Thytronic NV10B Manual 

T A B L E O F C O N T E N T S T A B L E O F C O N T E N T S 1 INTRODUCTION 5 Scope and liability ...........................................................................................................................................................................................5 Applicability ......................................................................................................................................................................................................5 Conformity ........................................................................................................................................................................................................5 Technical support ............................................................................................................................................................................................5 Copyright ...........................................................................................................................................................................................................5 Warranty ...........................................................................................................................................................................................................5 Safety recommendations ...............................................................................................................................................................................5 Insulation tests ................................................................................................................................................................................................5 Product identification .....................................................................................................................................................................................6 Environment .....................................................................................................................................................................................................6 Graphical conventions ...................................................................................................................................................................................6 Glossary/definitions ........................................................................................................................................................................................6 2 GENERAL 10 Preface ........................................................................................................................................................................................................... 10 Main features ................................................................................................................................................................................................ 10 Photo ...............................................................................................................................................................................................................11 3 TECHNICAL DATA 12 3.1 GENERAL ............................................................................................................................................................................................................12 Product standard for measuring relays .....................................................................................................................................................12 Mechanical data ...........................................................................................................................................................................................12 Insulation ........................................................................................................................................................................................................12 Voltage dip and interruption ........................................................................................................................................................................12 EMC tests for interference immunity .........................................................................................................................................................12 Emission ......................................................................................................................................................................................................... 13 Mechanical tests .......................................................................................................................................................................................... 13 Climatic tests ................................................................................................................................................................................................. 13 Safety ............................................................................................................................................................................................................. 13 Certifications ................................................................................................................................................................................................. 13 3.2 INPUT CIRCUITS ...............................................................................................................................................................................................14 Auxiliary power supply Uaux ......................................................................................................................................................................14 Voltage input circuits ....................................................................................................................................................................................14 Residual voltage input circuit ......................................................................................................................................................................14 Binary input circuits ......................................................................................................................................................................................14 3.3 OUTPUT CIRCUITS ............................................................................................................................................................................................14 Relays ..............................................................................................................................................................................................................14 3.4 MMI .....................................................................................................................................................................................................................14 3.5 COMMUNICATION INTERFACES ...................................................................................................................................................................15 Local port ........................................................................................................................................................................................................15 Remote ports ..................................................................................................................................................................................................15 3.6 GENERAL SETTINGS ........................................................................................................................................................................................16 3.7 PROTECTIVE FUNCTIONS ...............................................................................................................................................................................16 Thermal protection with Pt100 probes - 26 ...............................................................................................................................................16 Undervoltage - 27 ..........................................................................................................................................................................................16 Overvoltage - 59 .............................................................................................................................................................................................16 Residual overvoltage - 59N ..........................................................................................................................................................................17 Breaker failure - BF .......................................................................................................................................................................................17 3.8 CONTROL AND MONITORING ....................................................................................................................................................................... 18 Trip Circuit Supervision - 74TCS ................................................................................................................................................................. 18 Circuit Breaker supervision ........................................................................................................................................................................ 18 Oscillography (DFR) ..................................................................................................................................................................................... 18 PLC (Programmable Logic Controller) ...................................................................................................................................................... 18 3.9 METERING......................................................................................................................................................................................................... 19 Accuracy (type tests)................................................................................................................................................................................... 19 Measures ....................................................................................................................................................................................................... 19 4 FUNCTION CHARACTERISTICS 20 4.1 HARDWARE DESCRIPTION ............................................................................................................................................................................ 20 Power supply board ......................................................................................................................................................................................21 CPU board .......................................................................................................................................................................................................21 Input board .....................................................................................................................................................................................................21 MMI (keyboard, LED and display) ..............................................................................................................................................................21

4.2 SOFTWARE DESCRIPTION ..............................................................................................................................................................................22 Base software ................................................................................................................................................................................................22 Real-time operating system .........................................................................................................................................................................22 Task ..................................................................................................................................................................................................................22 Drivers ............................................................................................................................................................................................................ 23 Application Software ................................................................................................................................................................................... 23 Data Base ...................................................................................................................................................................................................... 23 Self test (Application) .................................................................................................................................................................................. 23 Development tools (Builder) ....................................................................................................................................................................... 23 4.3 I/O DESCRIPTION ..............................................................................................................................................................................................24 Metering inputs .............................................................................................................................................................................................24 Signal processing ..........................................................................................................................................................................................24 Conventions ....................................................................................................................................................................................................26 Use of measured values ...............................................................................................................................................................................27 Binary inputs ................................................................................................................................................................................................. 28 Output relays ..................................................................................................................................................................................................32 LED indicators ................................................................................................................................................................................................34 Communication interfaces ...........................................................................................................................................................................36 4.4 PROTECTIVE ELEMENTS .................................................................................................................................................................................37 Rated values ...................................................................................................................................................................................................37 Thermal protection with RTD thermometric probes - 26 ....................................................................................................................... 43 Undervoltage - 27 ..........................................................................................................................................................................................45 Overvoltage - 59 ............................................................................................................................................................................................ 49 Residual overvoltage - 59N ......................................................................................................................................................................... 53 Breaker failure - BF ...................................................................................................................................................................................... 58 4.5 CONTROL AND MONITORING ....................................................................................................................................................................... 60 Logical block - BLOCK1 ............................................................................................................................................................................... 60 Remote tripping .............................................................................................................................................................................................62 Frequency tracking ...................................................................................................................................................................................... 63 Trip circuit supervision - 74TCS...................................................................................................................................................................64 Circuit breaker supervision .........................................................................................................................................................................67 Oscillography ............................................................................................................................................................................................... 70 5 MEASURES, LOGIC STATES AND COUNTERS 71 Measures ........................................................................................................................................................................................................71 Protection .......................................................................................................................................................................................................71 Delayed inputs ...............................................................................................................................................................................................71 Internal states ................................................................................................................................................................................................71 Relays ..............................................................................................................................................................................................................71 Counters ..........................................................................................................................................................................................................71 Self test ...........................................................................................................................................................................................................72 Fault recording - SFR ....................................................................................................................................................................................72 Event recording - SER .................................................................................................................................................................................. 73 Oscillography - DFR ..................................................................................................................................................................................... 73 6 INSTALLATION 75 6.1 PACKAGING .......................................................................................................................................................................................................75 6.2 MOUNTING ........................................................................................................................................................................................................75 6.3 ELECTRICAL CONNECTIONS ......................................................................................................................................................................... 79 6.4 LED ALLOCATION ..............................................................................................................................................................................................85 6.5 FINAL OPERATIONS .........................................................................................................................................................................................85 7 PROGRAMMING AND SETTINGS 86 7.1 SW ThyVisor ......................................................................................................................................................................................................86 ThyVisor installation ......................................................................................................................................................................................86 ThyVisor use ...................................................................................................................................................................................................86 7.2 MMI (Man Machine Interface) ......................................................................................................................................................................87 Reading variables (READ) ............................................................................................................................................................................87 Setting modifying (SET) ................................................................................................................................................................................87 TEST ................................................................................................................................................................................................................ 89 COMMUNICATION ....................................................................................................................................................................................... 89 Circuit breaker commands ......................................................................................................................................................................... 90 Enable / block changes via keyboard - Password .................................................................................................................................. 90 7.3 MODULES MANAGEMENT .............................................................................................................................................................................91 7.4 MAINTENANCE .................................................................................................................................................................................................92 7.5 REPAIR ................................................................................................................................................................................................................92 7.6 PACKAGING .......................................................................................................................................................................................................92

8 APPENDIX 93 8.1 APPENDIX A1 - I/O Diagram ......................................................................................................................................................................... 93 8.2 APPENDIX A2 - Interfaces ..............................................................................................................................................................................94 8.3 APPENDIX A3 - Connection diagrams ..........................................................................................................................................................95 8.4 APPENDIX B - Dimensions ............................................................................................................................................................................. 99 8.5 APPENDIX C - Setting table ......................................................................................................................................................................... 100 8.6 APPENDIX D- EC Declaration of conformity ............................................................................................................................................. 118

1 I N T R O D U C T I O N 1 I N T R O D U C T I O N Scope and liability This document describes the functions, the technical data of NV10B devices; instructions for mount- ing, setting and commissioning are included. This manual has been checked out, however, devia- tions from the description cannot be completely ruled out, so that no liability in a legal sense for correctness and completeness of the information or from any damage that might result from its use is formally disclaimed. The information given in this document is reviewed regularly; any corrections and integration will be included in subsequent editions that are identified by the date of revision. We appreciate any suggestions for improvement. We reserve the right to make technical improvements without notice. Applicability This manual is valid for NV10B devices with firmware release 1.60 and following. Conformity The product complies with the CEE directives: • EMC Council Directives: 2014/30/EC • Low voltage Directives: 2014/35/EC Technical support Contact: Service tecnico THYTRONIC www.thytronic.it Copyright All right reserved; It is forbidden to copy, modify or store material (document and sw) protected by copyright without Thytronic consent. Warranty Thytronic warrants devices against defects in materials and workmanship under normal use for a period of ONE (1) YEAR from the date of retail purchase by the original end-user purchaser (“War- ranty Period”). Safety recommendations The warming contained in this document are all-important for safety; special attention must be paid to the following symbols: Installation and commissioning must be carried out by qualified person; Thytronic assumes no re- sponsibility for damages caused from improper use that does not comply all warning and caution in this manual. In particular the following requirements must be met: • Remove power before opening it. • Verify the voltage absence by means suitable instrumentation on relay connections; attention must be paid to all circuits supplied by external sources (binary input, CT, etc...) • Care must be taken when handling metal parts (front panel, connectors). Insulation tests After insulation tests, hazardous voltages (capacitor charges,...) may be arise; it is advisable to grad- ually reduce the test voltage avoiding to erase it abruptly. DANGER Death, severe personal injury or substantial property damage will result if proper precautions are not taken WARNING Death, severe personal injury or substantial property damage can result if proper precautions are not taken. CAUTION Minor personal injury or property damage can result if proper precautions are not taken CAUTION Settings must be established on the basis of a coordination study. Numerical values inside examples have educational purpose only; they don’t be used, in no way, for actual applications.

Product identification Each device is equipped with: • Identification label installed on the front side with following informations: code number, phase and residual nominal currents, auxiliary voltage range and CE mark: • Test label with following informations: data, serial number and test operator signature. Environment The NV10B device must be employed according to the environment conditions shown (see technical data). In case of different environment conditions, appropriate provisions must be provided (conditioning system, humidity control, etc...). If contaminants are present (dust, corrosive substances, etc...), filters must be provided. Graphical conventions The CEI/IEC and ANSI symbols is employed where possible: eg: 27 = ANSI code concerning the undervoltage element. Nel presente manuale sono utilizzati i seguenti formati tipografici: Following text formats are used: The ThyVisor[1] menu: Undervoltage - 27 The parameter description (measures, thresholds, operate time,...) and related value: U> element � � � � Definite�time U>def The display messages (MMI) are shown as: NV10 Notes are highlighted with cursive letters inside colored bar Note: Useful description note Glossary/definitions 27 Undervoltage ANSI code 59 Overvoltage ANSI code 59N Residual voltage ANSI code BF Breaker Failure 74VT VT monitoring 74TCS Trip Circuit Supervision DFR Digital Fault Recorder (Oscillography) SER Sequential Event Recorder SFR Sequential Fault Recorder ANSI American National Standard Institute IEEE Institute of Electrical and Electronics Engineers IEC International Electrotechnical Commission CENELEC Comité Européen de Normalisation Electrotechnique 52 o CB (Circuit Breaker) Circuit Breaker 52a Auxiliary contact in the breaker that is in the same position as the breaker. It can be assigned to a binary input to locate the CB posi- tion (Breaker failure and/or CB diagnostic functions). (52a open = CB open) 52b Auxiliary contact in the breaker that is in the opposite position as the breaker (52b open = CB closed) K1...K6...K10 Output relays Pulse Output relay with pulse operation tTR Output relay minimum pulse width Latched Output relay with latched operation (manual reset) Output relay with latched operation (automatic reset) No-latched Output relay with no-latched operation (automatic reset) CT Current Transformer P1 IEC nomenclature for primary polarity mark of CTs (as an alternative to a ANSI dot) P2 IEC nomenclature for primary polarity mark of CTs (as an alternative to a ANSI no-dot) S1 IEC nomenclature for secondary polarity mark of CTs (as an alternative to a ANSI dot) S2 IEC nomenclature for secondary polarity mark of CTs (as an alternative to a ANSI no-dot) Self test Diagnostic Note 1 The graphic interface and the operation of the ThyVisor software are described in the relative chapters

Start Leave an initial condition or reset condition (Pickup) Trip Operation (with operate time) Operating time Duration of time interval between the instant when the character- istic quantity in reset condition is changed, under specified condi- tions, and the instant when the relay operates Dropout ratio The ratio of a reset value to an operate value in well-specified con- ditions. The dropout ratio may be lower or greater than 1 according as an over or under element is considered Reset time Duration of the time interval between the instant when the charac- teristic quantity in operate condition is changed, under specified conditions, and the instant when the relay operates. The stated reset time is related to a step variation of characteristic quantity in operate condition to the reset condition. Overshoot time The critical impulse time for a relay which is in its reset condition, is the longest duration a specified change in the input energizing quantity(ies) (characteristic quantity), which will cause the relay to change to operate condition, can be applied without the relay switches. The overshoot time is the difference from the operate time and the critical impulse time. The declared values for the overshoot time are applicable with the lower setting value of the operation time. MMI (Man Machine Interface) Operator front panel ThyVisor Setting and monitoring software Log file A text file that lists actions that have occurred (ThyVisor). J2SE Java Platform Standard Edition Subnet Mask (Ethernet nomenclature) Sw Software Fw Firmware Upgrade Firmware upgrade XML eXtensible Markup Language

Symbols.ai Symbols I>> Start I>> BF_OUT IPh Block2 Logic internal signal (output); may be a logical state (e.g.I>> Start) or a numerical value It is available for reading (ThyVisor + communication interface) Logic external signal (intput); may be a command coming from a binary input or a sw command It is available for reading (ThyVisor + communication interface) Internal signal (e.g. Breaker Failure output state concerning to the 2nd threshold of the 50 element) It is not available for reading (missing arrow) AND and NAND logic gates OR and NOR logic gates Limit block (I>> threshold). Computation block (Max phase current) Threshold setting (e.g. pickup I>>). The value is available for reading and is adjustable by means ThyVisor + MMI. Switch ON delay timer with reset (tON delay) ON delay timer without reset (tON delay) OFF delay timer (dropout) without reset (tDROP delay) Curve type (definite/inverse time) 0 T I L3 Max[I L1 ,I L2 ,I L3 ] I L2 I L1 tON tON tON tON t RESET INPUT OUTPUT tDROP tON tON t INPUT OUTPUT tON tON tON t INPUT OUTPUT 0 T tON & & ≥1 ≥1 EXOR logic gate tDROP =1 I>> I I ≥ I>> tON RESET 0 T 0 T

Symbols1-en.ai t RESET INPUT OUTPUT tOFF tOFF tOFF tOFF Minimum pulse width operation for output relays (tTR) tTR t tTR INPUT OUTPUT tTR 0 T tTR t tTR INPUT OUTPUT Latched operating mode for output relays and LEDs Pulse operating mode for output relays t INPUT OUTPUT Latched tTR T 0 RESET OFF delay timer (dropout) with reset (tOFF delay)

2 G E N E R A L 2 G E N E R A L Preface The relay type NV10B can be typically used in HV, MV and LV distribution systems, on transformers or for electrical machines. It can be used for system decoupling, load shedding and loss of main (islanding) protection. In addition to the main protection element, the breaker failure (BF) , Trip Circuit Supervision (TCS) and programmable logic (PLC) are also provided are also provided. Following input circuits are available: • Three voltages (line-to-line or line-to-ground) with nominal voltages programmable in the range 50...130 V (UR=100V) or 200...520 V (UR = 400V) and one residual voltage input with nominal voltage programmable in the range 50...130 V (UER=100V). • Two binary inputs. Setting, programming and reading operations must be effected by means of Personal Computer with ThyVisor software or by means of remote communication interface (RS485 bus, Ethernet network and USB); all operations must be performed through MMI if enabled. According to the hardware configurations, the NV10B protection relay can be shipped in various case styles depending on the required mounting options: • Flush. • Projecting mounting. • Rack. • With separate operator panel. Other options are: • Auxiliary power supply operating range. • Communication protocols. Main features • Metallic case. • Backlight LCD 4x16 Display. • Eight LEDs that may be joined with matrix criteria to many and various functions. • RESET key to clear LED indications and latched output relays. • Two free settable binary inputs. • Independently settable for start, trip, self-test and control six output relay (K1...K6) Each output relay may be set with normally energized or normally de-energized operating mode and manual or automatic reset (latched/no-latched). • Rear Ethernet communication port, with MODBUS TCP/IP® protocol, with RJ45 (copper wires) or FX (optical fiber) connection. • Rear RS485 port, with ModBus protocol. • USB front serial port (local communication for ThyVisor). • Real time clock with super capacitor. NV10P-B-en.ai Protective elements

The most significant constructive features are: • Galvanically insulated input and output circuits (communication and binary circuits included). • Optimum filtering of input signals through combined use of analog and digital filters. • Traditional electromechanical-type final output contacts with continuous monitoring of control coil continuity. • Auxiliary supply comprising a switching-type voltage stabilizing circuit having a very wide working range and a very small power dissipation • Nominal frequency: 50 or 60 Hz. The most significant operating features are: • Programming of operating modes and parameters by means of the front keys and alphanumeric display, with a programming procedure based on carrying out guided selections and on explicit and immediate signalling of the operations being performed, so that such procedure can be carried out without coding tables or mnemonic informations. • The feature modification operations do not interrupt the normal functions of the relay. • Impossibility of programming unacceptable parameter values, thanks to the automatic limitation of top and bottom scale values for the relative setting ranges. • Currents are sampled 24 times per period and measured in the effective value (RMS) of the funda- mental component using the DFT (Discrete Fourier Transform) algorithm and digital filters. • The fault recorder (SFR) runs continuously capturing in circular mode the last twenty events upon trigger of binary input/output and/or element pickup (start-trip). • The event recorder (SER) runs continuously capturing in circular mode the last three hundred events upon trigger of binary input/output. • Digital fault recorder (DFR) in COMTRADE format (oscillography). Photo

3 T E C H N I C A L D ATA 3 T E C H N I C A L D ATA 3.1 GENERAL � Product standard for measuring relays Reference standards IEC 60255-1 Part 1: Common requirements � Mechanical data Mounting: • Flush. • Projecting. • Rack. • Separated operator panel. External dimensions (Flush mounting) 177 x 107 x 235 (high x width x depth) Terminals screw connection Mass (Flush mounting) 2.0 kg Reference standards EN 60529, EN 60529/A1 Degrees of protection provided by enclosures (IP Code) • Front IP52 • Terminals IP20 � Insulation Reference standards EN 60255-5, IEC 60255-27 High voltage test (50 Hz - 60 s) • Auxiliary power supply 2 kV • Input circuits 2 kV • Output circuits 2 kV • Output circuits (between open contacts) 1 kV • Comunication circuits 500 V Impulse voltage withstand test (1.2/50 µs): • Auxiliary power supply 5 kV (Common mode) - 2kV (Differential mode) • Input circuits 5 kV • Output circuits 5 kV • Output circuits (between open contacts) 1 kV Insulation resistance >100 MW � Voltage dip and interruption Reference standards EN 61000-4-29, IEC 60255-22-11 Voltage dips, short interruptions and voltage variations on dc input power port immunity tests • Interruption (UT=40%) 100 ms • Interruption (UT=0%) 50 ms • Voltage variations (UT=80...120%) 10 s � EMC tests for interference immunity Reference standards IEC 60255-26, EN 60255-26 Product standard for measuring relays Generic standards immunity for industrial environments EN 61000-6-2 • Electromagnetic compatibility requirements for measuring relays and protection equipment Apparati di automazione e controllo per centrali e stazioni elettriche • Compatibilità elettromagnetica - Immunità ENEL REMC 02 • Normativa di compatibilità elettromeccanica per apparati e sistemi ENEL REMC 01 Reference standards EN 60255-22-1 IEC 60255-22-1 EN 61000-4-12 EN 61000-4-12 Damped oscillatory wave • 0.1 MHz and 1 MHz common mode 2.5 kV • 0.1 MHz and 1 MHz differential mode 1.0 kV • Ring wave common mode 2.0 kV • Ring wave differential mode 1.0 kV Reference standards EN 60255-22-2 IEC 60255-22-2 EN 61000-4-2 IEC 61000-4-2 Electrostatic discharge • Contact discharge 6 kV • Air discharge 8 kV Reference standards EN 60255-22-3 IEC 60255-22-3 EN 61000-4-3 IEC 61000-4-3 Radiated radio-frequency fields • 80...1000 MHz AM 80% 10 V/m

• 900 MHz Pulse modulated 10 V/m Reference standards EN 60255-22-4 IEC 60255-22-4 EN 61000-4-4 IEC 61000-4-4 Fast transient burst (5/50 ns) • Auxiliary power supply 2 kV • Input circuits 4 kV Reference standards EN 60255-22-5 IEC 60255-22-5 EN 61000-4-5 IEC 61000-4-5 High energy pulse • Uaux (line-to-ground 10 ohm, 9 mF) 2 kV • Uaux (line-to-line 0 ohm, 18 mF) 1 kV • I/O ports (line-to-ground 40 ohm, 0.5 mF) 2 kV • I/O ports (line-to-line 40 ohm, 0.5 mF) 1 kV Reference standards EN 60255-22-6 IEC 60255-22-6 EN 61000-4-6 IEC 61000-4-6 Conducted radio-frequency fields • 0.15...80 MHz AM 80% 1kHz 10 V Reference standards EN 60255-22-7 IEC 60255-22-7 EN 61000-4-16 IEC 61000-4-16 Power frequency immunity tests • Dc voltage 30 V • 50 Hz continuously 30 V • 50 Hz 1 s 300 V • 0.015...150 kHz 30 V Reference standards EN 61000-4-8 IEC 61000-4-8 Magnetic field 50 Hz • 50 Hz continuously 100 A/m • 50 Hz 1 s 1 kA/m Reference standards EN 61000-4-10 IEC 61000-4-10 Damped oscillatory magnetic field • Damped oscillatory wave 0.1 MHz 30 A/m • Damped oscillatory wave 1 MHz 30 A/m � Emission Reference standards EN 60255-25 IEC 60255-25 EN 61000-6-4 IEC 61000-6-4 EN 55011 CISPR 11 Electromagnetic emission tests • Conducted emission auxiliary power supply 0.15...0.5 MHz 79 dB mV • Conducted emission auxiliary power supply 0.5...30 MHz 73 dB mV • Radiated emission 30...230 MHz 40 dB mV/m • Radiated emission 230...1000 MHz 47 dB mV/m � Mechanical tests Reference standards EN 60255-21-1 EN 60255-21-2 RMEC01 Vibration, shock, bump and seismic tests on measuring relays and protection equipment • EN 60255-21-1 Vibration tests (sinusoidal) Class 1 • EN 60255-21-2 Shock and bump test Class 1 � Climatic tests Reference standards IEC 60068-x ENEL R CLI 01 CEI 50 Environmental testing Ambient temperature -25...+70 °C Storage temperature -40...+85 °C Relative humidity 10...95 % Atmospheric pressure 70...110 kPa � Safety Reference standards IEC 60255-27 Safety requirements for electrical equipment for measurement, control and laboratory use Pollution degree 3 Reference voltage 250 V Overvoltage category III � Certifications Reference standards Product standard for measuring relays EN 50263 CE Conformity • EMC Directive 2014/30/EC • Low Voltage Directive 2014/35/CE Type tests IEC 60255-1

3.2 INPUT CIRCUITS � Auxiliary power supply Uaux Voltage Nominal value (range) 24...48 V~/- or 115...230 V~/110...220 V- Operative range (each one of the above nominal values) 19...60 V~/- 85...265 V~/75...300 V- Inrush current (max) • 24 V- 6 A, 5 ms • 48 V- 14 A, 5 ms • 110 V- 20 A, 1 ms • 230 V~ 50 A, 1 ms Frequency (for alternate voltage supply) 45...66 Hz Max distortion factor ( for alternating voltage supply) 15% Max alternating component (for dc voltage supply): • Full wave rectified sine wave 100 % • Sine wave 80 % Power consumption: • Maximum (energized relays, Ethernet TX) 10 W (20 VA) • Maximum (energized relays, Ethernet FX) 15 W (25 VA) � Voltage input circuits Relay phase to phase nominal voltage Un[1] 50...130 V (UR = 100 V) 200...520 V (UR = 400 V) Relay phase nominal voltage En = Un / √3 - Permanent overload 1.3 UR Thermal overload (1 s) 2 UR Rated consumption (for any phase) ≤ 0.5 VA � Residual voltage input circuit Relay residual nominal voltage UEn 50...130 V Permanent overload 130 V Thermal overload (1 s) 200 V Rated consumption ≤ 0.5 VA � Binary input circuits Quantity 2 Type optocoupler Operative range 24...265 V~/- Min activation voltage UDIGmin 18 V Max consumption, energized IDIG 3 mA 3.3 OUTPUT CIRCUITS � Relays Quantity 6 Type of contacts K1, K2 changeover (SPDT, type C) Type of contacts K3, K4, K5 make (SPST-NO, type A) Type of contacts K6 break (SPST-NC, type B) Nominal current 8 A Nominal voltage/max switching voltage 250 V~/400 V~ Breaking capacity: • Direct current (L/R = 40 ms) 50 W • Alternating current (l = 0,4) 1250 VA Make 1000 W/VA Short duration current (0,5 s) 30 A Minimum switching load 300 mW (5 V/ 5 mA) Life: • Mechanical 106 operations • Electrical 105 operations 3.4 MMI Display LCD alphanumeric 16x4 LEDs Quantity 8 • ON/fail (green) 1 • Start (yellow) 1 • Trip (red) 1 • Freely allocatable (red) 5 Keyboard 8 keys Note 1 UR = 100 V or UR = 400 V version must be selected at ordering

3.5 COMMUNICATION INTERFACES � Local port Connection USB Type B Protocol Modbus RTU® � Remote ports RS485 • Connection screw terminals • Baud rate 1200...57600 bps • Protocol ModBus®RTU IEC 60870-5-103 DNP3 Ethernet 100BaseT • Connection Optical fiber 1300 nm, ST 100 Base TX, RJ45 • Baud rate 100 Mbps • Protocol ModBus®TCP/IP

3.6 GENERAL SETTINGS Relay nominal frequency (fn) 50, 60 Hz Relay nominal voltage (Un) 50...130 V [1] (step 1 V) 200...520 V [2] (step 1 V) Relay residual nominal voltage (UEn) 50...130 V (step 1 V) Line VT primary nominal voltage (Unp) 50 V...500 kV 50...499 V (step 1 V) 500...4990 V (step 10 V) 5000...49900 V (step 100 V) 50000...500000 V (step 1000 V) Residual primary nominal voltage (phase-to-phase) ∙√3 (UEnp) 50 V...500 kV 50...499 V (step 1 V) 500...4990 V (step 10 V) 5000...49900 V (step 100 V) 50000...500000 V (step 1000 V) 3.7 PROTECTIVE FUNCTIONS � Thermal protection with Pt100 probes - 26[2] ThAL1...8 Alarm: Alarm threshold 26 PT1...PT8 (ThAL1...8) 0...200 °C Operating time ThAL1...8 (tThAL1...8) 0....100 s Th>1...8 Trip: Trip threshold 26 PT1...PT8 (Th>1...8) 0...200 °C Operating time ThAL1...8 (tTh>1...8) 0....100 s � Undervoltage - 27 Common configuration: 27 Operating logic (Logic27) AND/OR U< Element U< Curve type (U

U> Element U> Curve type (U>Curve) DEFINITE/INVERSE[1] Definite time 59 First threshold definite time (U>def) 0.50...1.50 Un/En (step 0.01 Un/En) U>def Operating time (tU>def) 0.03...100.0 s 0.03...9.99 s (step 0.01 s) 10.0...100.0 s (step 0.1 s) Inverse time 59 First threshold inverse time (U>inv) 0.50...1.50 Un/En (step 0.01 Un/En) U>inv Operating time (tU>inv) 0.10...100.0 s 0.10...9.99 s (step 0.01 s) 10.0...100.0 s (step 0.1 s) U>> Element Definite time 59 Second threshold definite time (U>>def) 0.50...1.50 Un/En (step 0.01 Un/En) U>>def Operating time (tU>>def) 0.03...100.0 s 0.03...9.99 s (step 0.01 s) 10.0...100.0 s (step 0.1 s) Pickup time ≤ 0.04 s Dropout ratio 0.95...0.98 Dropout time ≤ 0.04 s Overshoot time 0.03 s Pickup accuracy ± 1% ± 1% Un/En Operate time accuracy 5% or ± 10 ms � Residual overvoltage - 59N Common configuration: Residual voltage measurement type for 59N - direct/calculated (3VoType59N) UE /UEC UE> Element U> Curve type (U>Curve) DEFINITE/INVERSE[2] UE> Reset time delay (tUE>RES) 0.00...100.0 s 0.00...9.99 s (step 0.01 s) 10.0...100.0 s (step 0.1 s) Definite time 59N First threshold definite time (UE>def) 0.01...0.70 UEn (step 0.01 UEn) UE>def Operating time (tUE>def) 0.07...100.0 s 0.07...9.99 s (step 0.01 s) 10.0...100.0 s (step 0.1 s) Inverse time 59N First threshold inverse time (UE>inv) 0.01...0.50 UEn (step 0.01 UEn) UE>inv Operating time (tUE>inv) 0.10...100.0 s 0.10...9.99 s (step 0.01 s) 10.0...100.0 s (step 0.1 s) Element UE>> UE>> Reset time delay (tUE>>RES) 0.00...100.0 s 0.00...9.99 s (step 0.01 s) 10.0...100.0 s (step 0.1 s) Definite time 59N Second threshold definite time (UE>>def) 0.01...0.70 UEn (step 0.01 UEn) UE>>def Operating time (tUE>>def) 0.07...100.0 s 0.07...9.99 s (step 0.01 s) 10.0...100.0 s (step 0.1 s) Pickup time ≤ 0.04 s Dropout ratio 0.95...0.98 Dropout time ≤ 0.04 s Overshoot time 0.03 s Pickup accuracy ± 1% ± 1% UEn Operate time accuracy 5% or ± 10 ms � Breaker failure - BF BF Time delay (tBF) 0.06...10.00 s (step 0.01 s) Dropout ratio 0.95...0.98 Dropout time ≤ 0.05 s Operate time accuracy 5% or ± 10 ms Note 1 The mathematical formula for INVERSE curve is: t = (0.5 ∙ tU>inv) / [(U/U>inv) - 1] t = operating time (in seconds) tU>inv = operating time setting (in seconds) U = input voltage U>inv= threshold setting Note 2 The mathematical formula for INVERSE curve is t= (0.5 ∙ tUE>inv) / [(UE/UE>inv) - 1] t = operating time (in seconds) tUE>inv = operating time setting (in seconds) UE = residual input voltage (direct or calculated) UE>inv = threshold setting

3.8 CONTROL AND MONITORING � Trip Circuit Supervision - 74TCS Operate time: • One binary input supervision 40 s • Two binary inputs supervision 2 s Reset time delay: • One binary input supervision 6 s • Two binary inputs supervision 0.6 s � Circuit Breaker supervision Circuit breaker diagnostic Number of CB trips threshold (N.Open) 0...10000 (step 1) Circuit Breaker maximum allowed opening time (tbreak>) 0.05...1.00 s (step 0.01 s) � Oscillography (DFR)[1] Format COMTRADE Recording mode circular Sampling rate 24 samples / cycle Trigger setup: • Pre-trigger time 0.05...1.00 s (step 0.01 s) • Post-trigger time 0.05...60.00 s (step 0.05 s) Set sample channels: uL1, uL2, uL3, uE Set analog channels: Analog 1...Analog 12 Frequency, UL1, UL2, UL3, UE, UEC, df/dt T1...T8[2] Set digital channels: Digital 1...Digital 12 K1... K6, K7...K10, IN1, IN2, IN3...IN42[3] � PLC (Programmable Logic Controller)[4] Reference standard IEC 61131-3 Language[5] IL (Instruction List) Inputs: Binary inputs IN1, IN2 on board IN8...IN10 with MRI module IN11...IN26 with one MID16 module IN27...IN42 with two MID16 modules Delayed binary inputs[6] IN1, IN2 on board IN8...IN10 with MRI module IN11...IN26 with one MID16 module IN27...IN42 with two MID16 modules Start (all elements) Start U<, Start U<<,...etc Trip (all elements) Trip U<, Trip U<<,...etc Measures UL1, UL2,...ecc Temperature Pt100 Outputs: Relays K11...K6 on board K7...K10 with MRI module LEDs START, TRIP, L1...L6 on board L7...L10 with MRI module Current converter DAC Note 1 For the DFR function a licence is required; call Thytronic for purchasing. Note 2 The measures of temperature are available only when the MPT module on Thybus is enabled (eigth Pt100 inputs) Note 3 Output relay K7...K10 and binary input IN3...IN42 states are available only when the concerning I/O circuits are implemented (MRI and MID16 modules on Thybus) Note 4 For the PLC function a licence is required; call Thytronic for purchasing. Note5 With ThyVisor V3.4.3 release and compiler IEC 61131-3 V1.2.7 only the IL language is implemented (Instruction List); other languages, according with IEC 61131 standard (ST (Structured Text)), LD (Ladder Diagram), FBD (Function Block Diagram), SFC (Sequential Functional Chart), will be available soon Note 6 The input state is acquired downstream the tON and tOFF timers

3.9 METERING More data are available inside Section 5 - MEASURES, LOGIC STATES AND COUNTERS � Accuracy (type tests) MEASURE Reference values Accuracy Reference values Accuracy Phase voltage 0.1 Un 0.2% 1 Un 0.03% Measured residual voltage 0.01 UEn 0.02% 0.1 UEn 0.02% Calculated residual voltage 0.01 UECn 0.5% 0.1 UECn 0.3% Frequency 0.02 Un 3 mHz 1 Un 2 mHz Positive/Negative sequence voltage 0.01 Un 4% 0.15 Un 0.3% Pickup and operate time 1.5 x setting for fist element 5% ± 10 ms 2.5 x setting for other elements 5% ± 10 ms � Measures Direct Frequency (f ) RMS value of fundamental component of the input voltages (UL1, UL2, UL3) RMS value of fundamental component of the residual voltage (UE) Calculated Maximum voltage between UL1-UL2-UL3 (ULmax) Average voltage between UL1-UL2-UL3 (UL) Calculated residual voltage (UEC) Negative sequence voltage (U2) Third harmonic of residual voltage (UE-3rd) PT100 [1] Temperature PT1 (T1) Temperature PT2 (T2) Temperature PT3 (T3) Temperature PT4 (T4) Temperature PT5 (T5) Temperature PT6 (T6) Temperature PT7 (T7) Temperature PT8 (T8) Nota 1 La funzione 26 è disponibile nel momento in cui viene abilitato il modulo MPT collegato al relè su Thybus.

4 F U N C T I O N C H A R A C T E R I S T I C S 4 F U N C T I O N C H A R A C T E R I S T I C S 4.1 HARDWARE DESCRIPTION The following figure illustrates the basic structure of the relay. Printed boards hold the circuit components arranged according to a modular allocation of the main functions. hw.ai RTC EEprom Flash SRam SRam SPI CPU ETHERNET CPU BOARD POWER SUPPLY BOARD INPUT MODULE VTs DSP DUAL PORT ≈ ≈ ≈ ≈ EEprom Thybus RS485 RELAYS K1...K6 Output contacts USB MMI LCD LEDs BINARY INPUTS IN1 Input IN2 BLOCK I/O BLKIN Input BLKOUT POWER SUPPLY +5 V +10 V 0 V +24 V -10 V POWER FAIL RESET Uaux

Power supply board All the components necessary for conversion and stabilization functions are present. Two versions are envisaged suited to the input ranges 24...48 V and 115...230 V. The circuit provides stabilized voltages of +10 V and -10 V, required for the analogue measurement, +24V for relays and +5 V for supplying the digital circuits. The circuit board additionally comprises: • Two binary input circuits, with photo-couplers which provide for galvanic separation. • Six output relays (k1...K6). CPU board This circuit board contains all the circuits necessary for performing the analogue and digital pro- cessing of the signals. Analog processing The following are envisaged: • Anti aliasing filter circuits, • Amplifier circuits for conditioning the input signals, • Reference voltage adjustment circuits for the measurement A/D converter. The Pro-n relays use a DSP processor operating at 40 MHz; it performs all the processing on the analogue signals and furthermore coordinates management of the TX-RX signals to the CPU. The input currents are sampled at a frequency of 24 samples per period by means of a dual conver- sion system which allows the attainment of information pertaining to polarity and amplitude with high resolution. The measurement criterion allows precise measurement of even those signals having a unidirectional component, such as transient currents with overlapping exponential, which typically appear during faults. The circuit board also houses the output relays with the corresponding command and control cir- cuits, communication circuits, buttons, LCD display, LEDs and the key switch. CPU A 32 bit CPU is provided. The following are envisaged: • Real Time Clock circuits with oscillator and super capacitor, • USB communication port, • RS485 communication port, • Thybus communication circuits for external modules and MMI board, • Network communication circuits (optional Ethernet). Memories: • SRam: high speed static memory, used for data and cache, • Flash memory: used for fw storage and upgrade, • EEprom memory: used for calibration data storage, • Dual port Ram for data transfer between CPU and DSP. Input board • Three VTs committed for phase voltages acquisition, • One VT committed for residual voltage acquisition. MMI (keyboard, LED and display) The MMI module (Man Machine Interface) includes: • An eight keys 8 keyboard, • a backlight LCD display, • Eight signalling LEDs, The removable plug allows separation of the MMI module for free access to the CPU board when DIP-switch setting is required.

4.2 SOFTWARE DESCRIPTION The program which handles operation of the Pro-N relays is made up of three fundamental elements shown in the following block diagram. Base software Single modules are application independent with modular and scalable structure. The system can be assimilated to the PC BIOS (Basic Input-Output System); three main function are provided: • Start-up test execution; • RAM loading of the operating system; • Provide a suitable interface to access the relay hardware. Real-time operating system An embedded operative system is employed suitable for real-time applications (RTOS). A multithread preemptive structure is able to menage several task with multiple priority levels . The kernel represents the nucleus of the system: it includes the processing functions closest to the electronic circuits. In addition, the kernel manages a service communication protocol known as Basic Protocol (BP). Task The task (process e thread) are the base components. Example are: • Keyboard management • RTC (Real Time Clock) updating • RAM/EEPROM updating • Diagnostic • Input acquisition • Output relay management • MMI • I/O updating • DSP data processing sw.ai KEYS PC com Sync Binary inputs Output relays LEDs Fast devices EEPROM Slow devices RTC refresh EEPROM update Diagnostic DSP MMI task Oscillography Measures Drivers sampling RTOS timer SIMBOLOGIA Processo (task) Libreria funzionale (Drivers) Timer del sistema operativo Interrupt RTOS timer I/O I/O boards KEYS RTOS timer RAM/EPROM memory check RTOS timer RTOS timer DATA BASE TIMER Ethernet USB RS485 Counters Events Data Base Messages Thybus +

DSP Firmware By means of Discrete Fourier Transform calculation, based on 24 samples/period, information is de- duced in relation to the amplitude and phase of all the current measurements; these are constantly updated and at the disposal of all the protection and control application algorithms. Drivers Inside the driver library, all the specialized module for protection and control function are provided. They are the link from kernel and application layer. Examples are: • Data base management • PC messages management • TCP/IP messages management • Basic Protocol management • Counter management • Event and fault management • Measuring management • Oscillography management Application Software The software acts the specialization of the base system; all protective and control elements are inside it. The main modules ate: • Diagnostic function for application layer, • Input management (binary inputs), • Protective functions, • Event recording, • Output management (LEDs and relays) Each element (Kernel, Drivers and Application) may, in turn, be split into modules: Base protocol (kernel) The module known as the Basic Protocol (BP) manages the service communication between the kernel and the other modules through the communication buses with the following services: • Data and information exchange, • Calibration, • Upgrade fw DSP, • Upgrade application sw Communication (drivers) The ModBus TCP/IP protocol, with ethernet interface, the ModBus RTU, IEC 60870-5-103 and DNP3 protocol over RS485 interface and the ModBus RTU USB for ThyVisor are provided. MMI (drivers) The drivers deal with the menu management (MMi and/or communication messages). Data Base The data base is split into three main sections: • RAM for volatile data, • REE and PAR for non volatile data. Self test (Application) The main hw and sw function are permanently verified in background; no additional delay are intro- duced. In particular the following function are tested: • Reference voltages; • Output relays; • Sw flow with execution time monitoring; • REE and PAR data congruence. Development tools (Builder) For the development of the project, a CASE instrument has been developed, responsible for the opti- mized production of software code for the management of collaboration, the database and the MMI data and the Xml files used for communication. The automatic code generation criteria ensures the quality of the result in terms of the reusability, verifiability and maintainability of the software life cycle.

4.3 I/O DESCRIPTION Metering inputs The following inputs are provided: • Three phase voltage inputs with programmable nominal voltages within range 50...130 V (UR=100 V) or 200...520 V (UR = 400 V) to be select on order. The nominal voltages is user adjustable inside a wide setting range, so the relays can be employed on plants with TV different secondary voltages (50...130 V for versions with UR = 100 V and 200...520 V for versions with UR = 400 V). The version with UR = 400V allows a direct measure without interposing VTs for low voltage applications (200...520 V nominal voltage). • One residual voltage input, with programmable nominal voltage within range 50...130 V (UER=100 V); The input circuits are appropriately dimensioned in order to withstand the voltages which arise when a fault occurs, both in transient and steady state condition. Signal processing Various processing levels are involved: • Acquisition (base level). • Direct measures of physical channels (first level). • Calculated measures (second level). • Derived (third level). The measures concerning a level are based on data worked out in the previous level. For each level the required resources concerning the priority for tasks (conditioning circuits, DSP and CPU) are on hand. ACQUISITION (base level) The input signals are sampled 24 times per period: - uL1...uL3 Input voltage instantaneous values - uE Residual voltage instantaneous value From the sampled quantities, several measures are computed for protection, monitoring and meter- ing purposes. • Direct • Calculated Direct • Frequency. The measure of period is taken from voltage inputs. sensori-en.ai 3 line voltage inputs NV10 1 residual voltage input acquisizione-en.ai ACQUISITION INSTANTANEOUS MEASURES ≈ F.ai (Hz) uL1 uL2 UL1 UL2 ACQUISITION VT ≈ ≈ uL3 UL3 ≈ f T

Samples are processed by means DFT (Discrete Fourier Transform) algorithm and the phase and amplitude of fundamental are computed: • Input voltages UL1, UL2, UL3 • Residual voltage UE Calculated By means vector addition of direct measures the following are calculated (RMS value of fundamen- tal components): • Calculated residual voltage UEC • Negative sequence voltage: U2 Use of over-described measures is shown in the following tables. UL1-en.ai ACQUISITION uL1, uL2, uL3 DFT TV ≈ UL1, UL2, UL3 (En) UE-en.ai (UEn) (UEn) ACQUISITION uE DFT (fundamental) TV ≈ UE DFT (3rd harmonic) UE3H UEC.ai UL1 UEC = UL1 + UL2 + UL3 UEC UL3 UL2 (UEn) U2.ai UL1 U2 U2 = (UL1+ e-j120°UL2+ e+j120°UL3) UL3 UL2 e-j120°= - j √3 1 2 2 - e+j120°= - j √3 1 2 2 + (un)

Conventions Phase rotation direction The conventional rotation direction for the voltage phasors is counter-clockwise. Cyclic phase sequence order For three phase rotating voltages, a direct cyclic sequence is defined when the three phases are L1, L2, L3 ordered, while an inverse cyclic sequence is defined when the three phases are L1, L3, L2 ordered. fasori.ai fasori1.ai UL1 UL3 UL2 UL1 UL2 UL3 Direct sequence cyclic order Inverse sequence cyclic order

Use of measured values Usage of measured values for protection, control and monitoring. f uL1, uL2, uL3 UL1, UL2, UL3 U2 uE UE UEC Binary input IN1, IN2 Output Relay K1...K6 Start LED L1...L5 Trip LED L1...L5 Logic block (Block1) Breaker failure (BF) PROTECTION Undervoltage - 27       Overvoltage - 59       Residual overvoltage - 59N        Breaker failure - BF     CONTROL & MONITORING Trip Circuit Supervision (TCS)  Logic block (Block1)  Frequency tracking (IF)     Self EVENT RECORDING (SER) Event 0     Event 1     Event 2     Event ...     Event 299     FAULT RECORDING (SFR) Fault 0       Fault 1       Fault 2       Fault ...       Fault 19       DIGITAL FAULT RECORDER (OSCILLOGRAPHY) Record 1     Record 2     Record 3     Record ...    

Binary inputs Two binary inputs are available. The dry inputs must be powered with an external voltage, (usually the auxiliary power supply). The connections are shown in the schematic diagrams. The following settings can be used to configure each input: • Logic Active-ON (activated when powered), or Active-OFF (activated when power is turned off). • ON Timer (OFF-to-ON time delay) and OFF Timer (ON-to-OFF time delay). • Binary input allocation. Adjustable debounce timer allows any transient to decay avoiding false activation of the input; the positive transition is acquired if the input is permanently high for a time interval longer than the tON setting delay; similarly for the negative transitions, the negative transition is acquired if the input is permanently high for a time interval longer than the tOFF setting delay. In the above shown diagram, INTERNAL STATE represents the logical state of the binary input used in the following processing. Each binary input may be matched to one of the following default functions. FUNCTIONS Binary inputs IN1 IN2 Reset LEDs   Set profile (switching setting A and B)   Fault trigger (fault recording)   Block1 (logic block)   TCS1 (Trip Circuit Supervision)   TCS2 (Trip Circuit Supervision)   Trip ProtExt (trip from external protection relays)   Reset counters   Reset CB Monitor (clear CB monitoring data)   52a (CB auxiliary contact)   52b (CB auxiliary contact)   Open CB   Close CB   Remote trip   74VT ext. (74VT from external protection relays)   BINARY INPUT INTERNAL STATE tON tON tOFF tOFF t binary-timers.ai

Reset LEDs If the element tripped have gone back to rest condition, the latched LEDs and/or relays may be reset. Set profile Inside PRO-N devices, two independent setting profiles (A and B) are available. Whereas different settings are required, they are made in the setting profiles and stored in the non volatile memory of relay. Applicable setting profile is activated usually via a binary input; when the programmed input is activated, the profile B becomes operative as a replacement for the default profile A.[1] Fault trigger When the programmed input is activated, a trigger is issued for fault record SFR). Data storing takes place with the same procedure resulting from a trip of any protective elements. Note 1 To enable the profile switching the “Input-selected” parameter must be set inside the “Profile selection” submenu. If multiple setting groups are not required, Group A is the default selection Reset-led.ai TRIPPING MATRIX (LED+RELAYS) ≥ ≥ & & Set (ON≡turn on LED/relay) S Set-Reset latch R Reset (ON≡turn off LED/relay) Reset LEDs Binary input allocation for reset signalling (LEDs) T 0 INx t ON T 0 n.o. n.c. INx tON Logic INx tOFF INx t OFF Binary input INx (x=1, 2) Switch-profile.ai (A, B, from binary input) OFF≡Profile A, ON≡Profile B Binary input allocation for switching of setting profiles Profile A Profile B Profile A Profile selection Profile B Set profile T 0 INx t ON T 0 n.o. n.c. INx tON Logic INx tOFF INx t OFF Binary input INx (x=1, 2) Trigger-faults.ai Binary input allocation for fault recorder trigger Fault trigger T 0 INx t ON T 0 n.o. n.c. INx tON Logic INx tOFF INx t OFF Binary input INx (x=1,2) Fault recording Protection element UL1->UL1r UL2->UL2r ..... Inputs Outputs Fault cause info ≥1

Block1 A change in status of a binary input effects a block for a length of time equal to the activation of the input[1]; the element pickup that wish be blocked must be enabled (the Block1 parameter must be set to ON in the concerning menu).[2] The application of the IN1 binary input for the acquisition of the Block1 (logic block) coming from external signal is shown in the following figure; in the example the block signal is ORed with Block2 (selective block) to block the generic (xxx) element. TCS1 and TCS2 Trip Circuit Supervision. Supervision with one or two binary input can be performed. The exhaustive treatment of the TCS function is described in the concerning paragraph. Trip ProtExt The binary input detects a trip coming from an external protective relay: the information is available for the breaker failure function (BF). Reset counters A change in status of a binary input effects a reset of all start/trip partial counters.[3] Reset CB Monitor A change in status of a binary input effects a reset of all counters concerning the circuit breaker diagnostic: CB Open counter Note 1 The Block1 (logic block) keeps block of the protection for the whole time when the input is active. Note 2 The activation of one binary input produces indiscriminately a block of all protective elements programmed for being blocked from Block1 Note 3 The reset of the total counters is practicable by means ThyVisor command with Session Level 1 (available with password) Block1.ai xxxx Block1 Enable (ON≡Enable) Block1 input (ON≡Block) Block1 & Block1 Block1 Binary input IN1 Binary input allocation for logic block (Block1) Blocking T 0 IN1 t ON T 0 n.o. n.c. IN1 tON Logic IN1 tOFF IN1 t OFF TCS2.ai TRIP +UAUX Trip Circuit Supervision - 74TCS with two binary inputs -UAUX 52a 52b 52 TCS1 TCS2 74TCS logic 74TCS logic Binary input IN1 T 0 IN1 t ON 0 n.o. n.c. IN1 tON Logic IN1 tOFF IN1 t OFF Binary input IN1 T 0 IN1 t ON 0 n.o. n.c. IN1 tON Logic IN1 tOFF IN1 t OFF ExtProt.ai Breaker failure (BF) +UAUX -UAUX IN- IN+ Trip ProtExt Binary input IN1 T 0 IN1 t ON T 0 n.o. n.c. IN1 tON Logic IN1 tOFF IN1 t OFF Binary input allocation for trip acquisition from external protection device

52a-52b The CB position can be acquired by means of binary inputs connected to the auxiliary contacts: the information is used in the following functions: • CB position (open-closed) • CB diagnostic (N. of operations, trip time) • Breaker Failure (BF). Open CB Close CB The external acquisition of remote commands allows to drive CB remotely. Remote trip The input activation drives an expressly programmed output relay.. 74TV ext The external acquisition of 74TV allows to block or to change the operating mode of protective el- ements where the residual voltage is employed; the information is available for residual voltage protective elements (59N protections) that may operate inadvertently when an event cause a loss of one or more voltages. CB-pos.ai CB position CB diagnostic Breaker failure (BF) 52a 52 52b +UAUX -UAUX IN- IN+ 52a IN- IN+ 52b Binary input IN1 T 0 IN1 t ON T 0 n.o. n.c. IN1 tON Logic IN1 tOFF IN1 t OFF Binary input IN2 T 0 IN2 t ON T 0 n.o. n.c. IN2 tON Logic IN2 tOFF IN2 t OFF Binary input allocation for CB state acquisition CB-com.ai OPEN command CLOSE command +UAUX +UAUX -UAUX IN- IN+ Open CB IN- IN+ Binary input IN1 T 0 IN1 t ON T 0 n.o. n.c. IN1 tON Logic Close CB IN1 tOFF IN1 t OFF Binary input IN2 T 0 IN2 t ON T 0 n.o. n.c. IN2 tON Logic IN2 tOFF IN2 t OFF Binary input allocation for CB remote driving TRIPPING MATRIX (LED+RELAYS) -UAUX -UAUX 52 52a O I 52b Remote-trip.ai Remote trip +UAUX -UAUX Remote trip Binary input IN1, IN2 T 0 IN1 t ON T 0 n.o. n.c. IN1 tON Logic IN1 tOFF IN1 t OFF TRIPPING MATRIX (LED+RELAYS) Binary input allocation for remote trip

Output relays Six output relays are available (K1...K6)::[1] • K1 and K2 have two changeover contacts (SPDT, type C). • K3, K4 and K5 have one make contact (SPST-NO, type A).[2] • K6 has one break contact (SPST-NC, type B).[3] Each output relay may be programmed with following operating mode: • Operation MODE (No latched, Pulse, Latched). • Logic (Energized/De-energized). To each output relay a programmable timer is matched (Minimum pulse width parameter). All parameters are available inside the Set\Relays menu. Any change to the settings can be affected at any time, also with the relay on duty, separately for each relay. Notes: • When de-energized operating mode is set, the relay remains in rest condition if no trip command is in progress. • When energized operating mode is set, the relay remains in operating condition if no trip command is in progress and the auxiliary supply is powered on. • When no-latched operating mode is set (Operation MODE No latched), the output relay reset at the end of the trip condition. To each output relay a programmable timer is matched (minimum pulse width operation). • When latched operating mode is set (Operation MODE Latched), the output relay doesn’t reset at the end of the trip condition; it stays ON until a reset command is issued (RESET key, ThyVisor or communication command). • When pulse operating mode is set (Operation MODE Pulse), the output relay reset after a tTR programmable delay regardless of the trip condition. • It is advisable to make sure that the output contact technical data are suitable for load (Nominal current, breaking capacity, make current, switching voltage,...). Matching every output relay to any protective element is freely programmable inside the Setpoints submenus according a tripping matrix structure.[4][5] Note 1 Schematic diagram are shown inside APPENDIX B1. Note 2 K3 and K4 have a common terminal (A10) Note 3 K5 and K6 have a common terminal (A13) Note 4 Matching of the output relay to the protective and control functions can be defined so that any collision from other function is avoided. All output relay are unassigned in the default setting. Note 5 Self test relay: it is advisable to plan the following settings: - Energized operating mode, - No-latched , in order that it stays ON for normal conditions and the other way round it goes OFF if any fault is detected and/or the auxiliary supply turns OFF. Input No-latched operation Latched operation Pulse operation Output relay operation Minimum pulse width Relay-operation-timers.ai t Minimum pulse width tTR tTR

FUNCTION RELAYS K1 K2 K3 K4 K5 K6 Self-test relay       U< Start relays (U< ST-K)       U< Trip relays (U< TR-K)       U<< Start relays (U<< ST-K)       U<< Trip relays (U<< TR-K)       U> Start relays (U> ST-K)       U> Trip relays (U> TR-K)       U>> Start relays (U>> ST-K)       U>> Trip relays (U>>TR-K)       UE> Start relays (UE> ST-K)       UE> Trip relays (UE> TR-K)       UE>> Start relays (UE>> ST-K)       UE>> Trip relays (UE>>TR-K)       74TCS Start relays (74TCS-ST-K)       74TCS Trip relays (74TCS-TR-K)       BF Start relays (BF-ST-K)       BF Trip relays (BF-TR-K)       Number of CB trips diagnostic relays (N.Open-K)       Circuit breaker opening time diagnostic relays (tbreak-K)       Open CB command relays (CBopen-K)       Close CB command relays (CBclose-K)       Remote tripping relays (RemTrip-K)      

LED indicators Eight LEDs are available. • One green LED “ON”: if turned on it means that the device is properly working, if flashing the inter- nal self-test function has detected an anomaly. • One yellow LED “START” tagged for START of one or more protective elements.[1] • One red LED “TRIP” tagged for TRIP of one or more protective elements.[1] • Five red LEDs “1...5” for highlight the activation of one or more user defined function. Each output relay may be programmed with following operating mode: • No-latched: the LED reset at the end of the trip condition. • Latched: the LED doesn’t reset at the end of the trip condition; it stays ON until a manual reset command is issued (RESET key, ThyVisor or communication command). Any change to the settings can be affected at any time, also with the relay on duty, separately for each LED Programming and/or configuration changes can be carried out at any time, separately for each LED by setting the parameters inside the Set\Led menu. Free allocation of each LED may be set according to the matrix structure shown in the following page.[2] Note 1 The START and the TRIP LED are user assignable to any function; other than starting and tripping information can be assigned to them too, just the same for L1...L5 Note 2 All LEDs are unassigned in the default setting. Led CB Open CB Close

FUNCTIONS LED START TRIP 1 2 3 4 5 U< Start LEDs (U< ST-K)        U< Trip LEDs (U< TR-K)        U<< Start LEDs (U<< ST-K)        U<< Trip LEDs (U<< TR-K)        U> Start LEDs (U> ST-K)        U> Trip LEDs (U> TR-K)        U>> Start LEDs (U>> ST-K)        U>> Trip LEDs (U>>TR-K)        UE> Start LEDs (UE> ST-K)        UE> Trip LEDs (UE> TR-K)        UE>> Start LEDs (UE>> ST-K)        UE>> Trip LEDs (UE>>TR-K)        74TCS Start LEDs (74TCS-ST-K)        74TCS Trip LEDs (74TCS-TR-K)        BF Start LEDs (BF-ST-K)        BF Trip LEDs (BF-TR-K)        Number of CB trips diagnostic LEDs (N.Open-K)        Circuit breaker opening time diagnostic LEDs (tbreak-K)        Open CB command LEDs (CBopen-K)        Close CB command LEDs (CBclose-K)        Remote tripping LEDs (RemTrip-K)       

Communication interfaces Several communication ports are provided: • USB port on the front side of the NV10 device for local communication (ThyVisor). • RS485 port on the rear side of the NV10 device for bus communication. • Ethernet port on the rear side of the NV10 device for bus communication. USB to connect the local port USB can be used the L10042 cable ( USB type B - Type A) The serial port is the simplest access for setting by means the ThyVisor software. RS485 Several protocol are implemented[1]: • ModBus RTU. Modbus is a serial communications protocol. It is a de facto standard communica- tions protocol in industry, and is now the most commonly available means of connecting industrial electronic devices also inside electric utilities and substation. • IEC 60870-5. The IEC 60870-5 suite of protocol is used for communications from master station to substation, as well within the substation; the IEC 60870-5-103 (Protection equipment) is available together the Modbus protocol on some version of Pro-n devices (code NVxx#xxxxC x). Ethernet It is provided (optionally) a communication board useful for Ethernet communication with ModBus TCP/IP protocol.[2] Modbus/TCP basically embeds a Modbus frame into a TCP frame in a simple manner. This is a con- nection-oriented transaction which means every query expects a response. This query/response technique fits well with the master/slave nature of ModBus, adding to the de- terministic advantage that Switched Ethernet offers industrial users. In the same way as the RS485 base Modbus, every device is identified by a personal address and the communication goes in “client-server” mode with answering request from the recipient. The protective relay can be directly connect to the Ethernet network (no gateway, protocol converter are needed). Two port can be implemented: • 100BASE-TX with RJ45 connector (copper). • 100BASE-FX with FX connector (optical fiber)[2] For both modules no hw preset are required. Two LEDs are on board (RJ45): • LINK - (green): The LED lights up if the connection is active. • TX - (yellow): The LED lights up when data transmission is active. Note 1 The RS485 port is not implemented on the Pro-N devices endowed with Ethernet FX port Note 2 Information about the ModBus map may be find inside the “Remote programming manual” ethernet-sch.ai RX FX Ethernet (no RS485 port) TX 1 TX+ 2 TX- 3 RX+ 4 5 6 RX- 7 8 RJ45 Ethernet+RS485 ports RS485 F1 F2 F3 F4 F5 A+ B-

4.4 PROTECTIVE ELEMENTS Rated values Inside the Base menu the following parameters may be set: • Relay reference name. • Relay nominal voltages (phase and residual), to which the regulation are related. • Primary nominal values, employed for measures relative to primary values. • Measurements reading mode. Information for settings: • Relay reference name. Alphanumeric mnemonic string (max 16 characters) useful for identification of protected plant. • Relay nominal frequency fn This nominal value must be set same as the frequency of the grid. Example: grid frequency fn = 50 Hz Relay nominal frequency fn = 50 Hz • Relay nominal voltage Un Two reference voltage are available: UR=100 V and UR=400V The Un relay nominal voltage must be set to the value of relay input voltages at grid nominal volt- age. The Un value must calculated as: If VTs with primary nominal voltage is equal to the grid voltage divided by √3, the following stream- lined calculus may be used: Un = VTs secondary nominal voltage [V] x √3 Example 1 The relay nominal voltage may be set to: Un = Ung / √3 · KTV = 6000 /√3 · 60 = 100 /√3 = 58 V Voltage transformer ratio KTV Grid nominal voltage Ung where the VTs are included [V] Un = Es1-Un.ai KTV = / / V V 6000 3 100 3 = 60 Ung = 6.0 kV NV10B UL1 UL2 UL3 VOLTAGE INPUTS n a N A L1 L2 L3 Phase to ground VTs connection B5 B6 B3 B4 B1 B2

Example 2 The relay nominal voltage may be set to: Un = Ung /KTV = 6000 / 60 = 100 V Example 3 The relay nominal voltage may be set to: Un = Ung /KTV = 6000 / 60 = 100 V Example 4 The relay nominal voltage may be set to: Un = Ung = 400 V Es2-Un.ai KTV = / / V V 6000 3 100 3 = 60 Ung = 6.0 kV NV10B UL1 UL2 UL3 VOLTAGE INPUTS n a N A L1 L2 L3 B5 B6 B3 B4 B1 B2 Phase to phase VTs connection Es3-Un.ai KTV = V V 6000 100 = 60 Ung = 6.0 kV NV10B UL1 UL2 UL3 VOLTAGE INPUTS a a n n A A N N L1 L2 L3 B5 B6 B3 B4 B1 B2 Two VTs connection Es4-Un.ai Ung = 400 V NV10B UL1 UL2 UL3 VOLTAGE INPUTS L1 L2 L3 B5 B6 B3 B4 B1 B2

• Relay residual nominal voltage UEn Three instances are expected: A) residual voltage acquired with open delta VT. B) residual voltage measure by means VT connected from star-point and earth. C) residual voltage measure by vector calculus. Case A The residual nominal voltage UEn may be estimated by means of the following general formula (ef- fective for insulated neutral or impedance-ground connected grids): If open delta VT with primary nominal voltage balances to the grid voltage divided by √3, the follow- ing streamlined calculus may be used: UEn = 3 · VT open delta secondary nominal voltage [V] for insulated or impedance-ground neutral grids. Example A1 The relay residual nominal voltage UEn must be estimated by means of the following general for- mula: UEn = √3 · Ung /KVT = √3 · 6900 / (√3 · 100) = 69 V Example A2 The relay residual nominal voltage UEn must be indifferently estimated by means of the following general formula: UEn = √3 · Ung /KVT = √3 · 6000 / (√3 · 60) = 100 V or by means the following: UEn = 3 · Uns = 3 · 100 / 3 = 100 V Case B The relay residual nominal voltage UEn must be estimated by means of the following general for- mula: If a VT with primary nominal voltage equal to the grid voltage divided by √3 is connected from star neutral to ground, the following streamlined calculus may be used: UEn = VT secondary nominal voltage [V] VT ratio KVT UEn = Grid nominal voltage Ung where the VTs [V] x √3 are connected / Es1-UEn.ai KVT = / / V V 10000 3 100 3 3 = 100 · = 100 · 3 / / V V 10000 3 100 3 Grid nominal voltage Ung = 6.9 kV VT ratio: KVT = Insulated or impedance-ground neutral / Ung = 6.9 kV UEn 52 NV10B Es2-UEn.ai KVT = / V V 6000 3 100 / 3 3 = 60 · Insulated or impedance-ground neutral Unp = 6 kV UEn 52 NV10B = 60 · 3 / / V V 6000 3 100 3 Grid nominal voltage Ung = 6 kV VT ratio: KVT = / Voltage transformer ratio KTV Grid nominal voltage Ung where the VTs are included [V] / √3 UEn =

Example B1 The relay residual nominal voltage UEn may be estimated by means of the following general for- mula: UEn = (Ung /√3) /KVT = (10000 /√3) / (110/ √3) = 91 V Example B2 The relay residual nominal voltage UEn may be estimated by means of the following general for- mula: UEn = (Ung /√3) /KVT = (6000 /√3) / (60/ √3) = 100 V Case C The relay residual calculated nominal voltage UECn is estimated automatically by means of the for- mula: UECn = √3∙ Un Example C1 According with the example 2 where UEn = 100 V the relay residual calculated nominal voltage UECn is calculated inside the relay as: UECn = Un ∙ √3 = 100 ∙ √3 = 173 V • VTs Phase primary voltage Unp (phase-to-phase) This parameter affects the measure of the input voltages when the primary measurement reading mode is selected. If the formerly indications concerning the relay nominal voltage Un are complied (Phase to ground and phase-to-phase VTS connection diagrams), then the Unp setting must be adjusted to: Unp = grid nominal voltage [V]]. EsB1-UEn.ai KVT = / V V 11000 3 3 100 = 110 / KVT = / V V 11000 3 3 100 = 110 / Grid nominal voltage Ung = 10 kV Ratio of VT connected from star neutral to ground: Ung = 10 kV NV10B UEn EsB2-UEn.ai KVT = / V V 6000 3 3 100 = 60 / KVT = / V V 6000 3 3 100 = 60 / Grid nominal voltage Ung = 6kV Ratio of VT connected from star neutral to ground: Ung = 6 kV UEn NV10B Es4-UEn.ai KVT = / / V V 6000 3 100 3 = 60 / / V V 6000 3 100 3 = 60 Grid nominal voltage Ung = 6 kV Ratio of line VTs KVT = Unp /Uns = Ung = 6 kV Un, UECn 52 NV10B

Example 1 The Unp setting must be adjusted to: Unp = Ung = 6.0 kV Example 2 The Unp setting must be adjusted to: Unp = Ung = 6 kV Example 3 The Unp setting must be adjusted to: Unp = Ung = 400 V • Residual primary voltage UEnp This parameter affects the measure of the direct residual voltage when the primary measurement reading mode is selected. If the formerly indications concerning the relay nominal residual voltage UEn are complied, then the UEnp setting must be adjusted to (effective for insulated neutral or impedance-ground connected grids): UEnp = √3 ∙ grid nominal voltage [V]. Example 1 Es1-Ung.ai KTV = / / V V 6000 3 100 3 = 60 / / V V 6000 3 100 3 = 60 Grid nominal voltage Ung = 6.0 kV VTs ratio: KTV = Relay nominal voltage Un = 58 V Un = 58 V Ung = 6.0 kV 52 NV10B Es2-Ung.ai KVT = / / V V 6000 3 100 3 = 60 / / V V 6000 3 100 3 = 60 Grid nominal voltage Ung = 6 kV VTs ratio: KTV = Relay nominal voltage Un = 100 V Un = 100 V Ung = 6 kV 52 NV10B Es3a-Un.ai Ung = 400 V Un = 400 V 52 NV10B Es-UEnp.ai KVT = / / V V 10000 3 3 100 3 = 100 · / / V V 10000 3 3 100 3 = 100 · Grid nominal voltage Ung = 6.9 kV VT ratio: KVT = Relay residual nominal voltage UEn = 69 V UEn = 69 V / Ung = 6.9 kV 52 NV10B Insulated or impedance-ground neutral

The UEnp setting must be adjusted to: UEnp = √3 · Ung = √3 · 6900 V = 11900 V Example 2 The UEnp setting must be adjusted to: UEnp = √3 · Ung = √3 · 10000 V = 17300 V • Measurement reading mode Measures may be displayed according the following operating modes: - With RELATIVE setting all measures are related to the nominal value, - With PRIMARY setting all measures are related to the primary value. Es3-UEn.ai KVT = / V V 11000 3 3 100 = 110 / KVT = / V V 11000 3 3 100 = 110 / Grid nominal voltage Ung = 10 kV Ratio of voltage transformer connected from star neutral to ground: NV10B Ung = 10 kV UEn = 91 V

Thermal protection with RTD thermometric probes - 26 Preface The measure of temperature is acquired by means of Pt100 (RTD Resistive Temperature sensing Devices) probed, connected to the MPT module.[1] A direct thermal protection element with eight PT100 thermometric probes (RTD Resistive Thermal Device) provides protection against premature ageing or breakdown of the insulating materials through overheating. Thermal protection using thermometric probes offers greater reliability than Thermal overload-based indirect protection, since it is not influenced by inaccuracies in the time constant for the thermal model of the machinery and by variations in the surrounding temperature. For each thermometric probe an alarm (ThALx, where x=1...8 points one of the eight probes) and one trip adjustable threshold is provided (Th>x), with adjustable operating time (tThALx and tTh>x>);if the measured temperature overcomes the threshold, the relative alarm and/or trip is issued when the timer expires. The adjustments are operable in °C. The probes should be placed in strategic points around the machinery susceptible to the greatest overheating, such as for example: - near the generator stator windings, near the step-up transformer windings and/or in the oil, with the aim of detecting overheating produced by the overload currents, - near the generator bearings, with the aim of detecting localised overheating due to worn or non- lubricated bearings. The Pt100 probes detect the temperature in the range -50 °C...+250 °C (at 0 °C its resistance is 100 ohm); an alarm indicates any interruption or short-circuiting of the probe or related connections to the MPT module; the information is available inside the Read \ PT100 menu: • Ptx probe ON to point a measure inside the range • Ptx probe LOW to point a measure lower the range (short circuit of probe and/or wires) • Ptx probe HIGH ao point a measure higher the range (breaking of probe and/or wires). Self reset is performed when faults are cleared. The measure of each probe is updated at 2 s time intervals. Note 1 The 26 menu is available when the MPT module is enabled t-int-F26.ai T (°C) t General operation time characteristic for thermal protection with RTD thermometric probes (26) Th>x tTh>x tThALx TRIP all-F26.ai General logic diagram of the thermal elements - (26) Pt100 Thybus MPT AL ARM TRIP Trip Element Alarm Element ThALx enable Th>x enable ThALx Th>x t ThALx t Th>x Th>xBF Trip Th>x & Th>xBF t-refresh-F26.ai t Pt1...8 update Pt1 Pt2 Pt3 Pt4 Pt5 Pt6 Pt7 Pt8 Pt1 0.25s 0.25s 0.25s 0.25s 0.25s 0.25s 0.25s 0.25s 2.0s

All alarm and/or trip elements can be enabled or disabled by setting ON or OFF the ThALx Enable e Th>x Enable parameters inside the Set \ Profile A(or B) \ Thermal protection with RTD thermo- metric probes - 26 \ PTx Probe \ ThALx Alarm (ThALx Trip) where x = 1...8. Each trip threshold (Th>x) may be associated with the breaker failure (BF) function by setting ON the Th>xBF parameters inside the Set \ Profile A(or B) \ Thermal protection with RTD thermometric probes - 26 \ PTx Probe \ ThALx Trip where x = 1...8.[1] Note 1 The common settings concerning the Breaker failure protection are adjustable inside the Breaker Failure - BF menu. Fun-F26.ai Logic diagram for thermal protection with RTD thermometric probes (26) T° ≤ +245.0°C T° > Pt x> Ptx Pt1 Pt2 Pt3 Pt4 Pt5 Pt6 Pt7 Pt8 0 T TRIPPING MATRIX (LED+RELAYS) T° > ThALx Pt100-x Trip Pt100-xAlarm t Th>x t ThALx BF Enable (ON≡Enable) Pt100 OK Pt100 FAULT Th>xBF TOWARDS BF LOGIC Th>x BF_OUT TOWARDS DIAGNOSTIC Pt x> Diagnostic TRIP & & & T° ≥ -49.0°C 0 T ThALx-K ThALx-L Th>x-K Th>x-L ThALx Th>x t ThALx t Th>x

Undervoltage - 27 Preface Two operation thresholds, independently adjustable (U<, U<<) with adjustable delay (tU<, tU<<). The first one may be programmed with definite or inverse time, while the second threshold operates with definite time characteristic. Each threshold may be separately enabled or disabled. The first threshold trip (U<) may be inhibited by start of the second threshold (U<<). Operation and settings The fundamental frequency of the input voltages (UL1, UL2, UL3) are employed. Each of three voltages compared with the setting values (U<, U<<). The start and trip logic may be selected OR or AND. With OR selection, a start is issued when at least one of the three voltages goes down the adjust- able threshold (START); with AND selection, a start is issued when all the three voltages go down the adjustable threshold. After expiry of the associated operate time (tU<, tU<<) a trip command is issued; if instead the volt- ages exceed the threshold, the element is restored. The first threshold (U<) may be programmed with definite or inverse time according the following characteristic curve: t=0.75 tU

All undervoltage elements can produce the Breaker Failure output if the U< BF and U<< BF pa- rameters are set to ON. The parameters are available inside the Set \ Profile A(or B) \ Undervoltage - 27 \ U< Element (U<< Element) \ Setpoints menus.[1] All the named parameters can be set separately for Profile A and Profile B (Set \ Profile A(or B) \ Undervoltage - 27 \ U< Element (U<< Element) \ Setpoints menus). For every of the two thresholds the logic block can be set. Logical block (Block1) If the U

Fun-F27_S1.ai Logic diagram concerning the first threshold (U<) of the undervoltage element - 27 U< Inhibition (ON≡Inhibit) & U< Curve 0 T RESET tU< 0 T TRIPPING MATRIX (LED+RELAYS) tU

F_27-Char.ai Inverse time operating characteristic concerning the first threshold (U<) of the undervoltage element - 27 0.9 0.1 1 U /U

Overvoltage - 59 Preface Two operation thresholds, independently adjustable (U>, U>>) with adjustable delay (tU>, tU>>). The first one may be programmed with definite or inverse time, while the second threshold operates with definite time characteristic. Each threshold may be separately enabled or disabled. The first threshold trip (U>) may be inhibited by start of the second threshold (U>>). . Operation and settings The fundamental frequency of input voltages are utilized. Each of three voltages is compared with the setting values (U>, U>>). The start and trip logic may be selected OR or AND; with OR selection, a start is issued when at least one of the three voltages overcomes the adjustable threshold (START); after expiry of the as- sociated operate time (tU>, tU>>) a trip command is issued; if instead the voltages drops below the threshold, the element is restored. With AND selection, a start is issued when all the three voltages overcomes the adjustable thresh- old; after expiry of the associated operate time (tU>, tU>>) a trip command is issued; if instead the voltage drops below the threshold, the element is restored. The first threshold (U>) may be programmed with definite or inverse time according the following characteristic curve: t=0.5 tU>inv / [(U/U>inv) - 1] Where: t: operate time U>inv: threshold setting tU>inv: operate time setting For the inverse time characteristic, following data applies: • The operate time setting is referred to an input voltage equal to 1.5 of the pickup value. • Asymptotic reference value (minimum pickup value): 1.1 U>inv • Minimum operate time: 0.1 s • Range where the equation is valid: 1.1 ≤ U/U>inv ≤ 4 • If U>inv pickup ≥ 0.5 Un, the upper limit is 2 Un. The first overvoltage element can be programmed with definite or inverse time characteristic by setting the U>Curve parameter (DEFINITE, INVERSE) available inside the Set \ Profile A(or B) \ Overvoltage-59 \ U> Element \ Setpoints menu. Each element can be enabled or disabled by setting ON or OFF the U> Enable parameter inside the Set \ Profile A(or B) \ Overvoltage-59 \ U> Element \ Setpoints menu and/or the State parameter inside the Set \ Profile A(or B) \ Overvoltage-59 \ U>> Element \ Definite time. The operating logic (AND or OR) is adjustable inside the Set \ Profile A(or B) \ Overvoltage-59 \ Com- mon configuration menu by means the Logic59 parameter; the allowed settings are OR (at least one voltage larger than threshold) or And (all three voltage must be larger than threshold). The first threshold trip (U>) may be inhibited by start of the second threshold (U>>) by setting ON the U> Disabling by U>> start (U>disbyU>>) parameter available inside the Set \ Profile A(or B) \ Overvoltage-59 \ U>> Element \ Setpoints menu. t-int-F59.ai U U>> tU> tU>> U> t TRIP General operation time characteristic for the overvoltage elements - 59

Both overvoltage elements can produce the Breaker Failure output if the U> BF and U>>BF pa- rameters are set to ON. The parameters are available inside the Set \ Profile A(or B) \ Overvoltage - 59 \ U> Element (U>> Element) \ Setpoints menus.[1] All the named parameters can be set separately for Profile A and Profile B (Set \ Profile A(or B) \ Overvoltage - 59 \ U> Element (U>> Element) \ Setpoints menus). Note 1 The common settings concerning the Breaker failure protection are adjustable inside the Breaker Failure - BF menu. all-F59.ai General logic diagram of the overvoltage elements - 59 U U U> Element U>> Element Start U>> Start U>> Start U> Trip U> Trip U>> & U> disbyU>> U> inhibition tU> def tU> inv U>def tU>> def U>>def U> inv U> Curve U> Enable State Block1 BLK1U> & U>BLK1 Start U> & Block1 BLK1U>> & U>>BLK1 Start U>> & U>BF Trip U> & U>BF AND U UL1,UL2,UL3 OR Common configuration Logic59 Fun-F59_S1.ai U> Curve 0 T RESET tU> 0 T TRIPPING MATRIX (LED+RELAYS) tU>def tU>inv Start U> U>ST-K Start U> U>TR-K U>ST-L U>TR-L Trip U> Trip U> Trip U> BF Enable (ON≡Enable) U>BF towards BF logic & BLK1U> U> BF & & & Enable (ON≡Enable) Block1 input (ON≡Block) U>BLK1 Block1 Block1 Binary input INx (x=1...8-16) T 0 Logic INx t ON INx t ON INx t OFF T 0 n.o. n.c. INx t OFF U> Inhibition (ON≡Inhibit) & Logic59 ≥1 & UL1 UL2 UL3 ≥1 & State U>inv U ≥ U>def U ≥ U>inv U>def & State ON≡Enable U> overvoltage element U> Enable Logic diagram concerning the first threshold (U>) of the overvoltage element - 59

For every of the two thresholds the logic block can be set. Logical block (Block1) If the U>BLK1 and/or U>>BLK1 enabling parameters are set to ON and a binary input is designed for logical block (Block1), the protection is blocked off whenever the given input is active. The trip timer is held in reset condition, so the operate time counting starts when the input block goes down.[1] The enabling parameters are available inside the Set \ Profile A(or B) \ Overvoltage - 59 \ U> Element (U>> Element) \ Setpoints menus, while the Block1 function must be assigned to the selected binary input inside the Set \ Inputs \ Binary input IN1(x) menus (IN1 or INx matching). Note 1 The exhaustive treatment of the logical block (Block 1) function may be found in the “Logic Block” paragraph inside CONTROL AND MONITOR- ING section. Fun-F59_S2.ai RESET tU>> 0 T TRIPPING MATRIX (LED+RELAYS) tU>>def Start U>> Start U>> Trip U>> Trip U>> Trip U>> BF Enable (ON≡Enable) towards BF logic & U>> BF & & & Enable (ON≡Enable) Block1 input (ON≡Block) Block1 Block1 & (ON≡Inhibit) U> Inhibition U>disbyU>> Binary input INx (x=1...8-16) T 0 Logic INx t ON INx t ON INx t OFF T 0 n.o. n.c. INx t OFF U>>ST-K U>>TR-K U>>ST-L U>>TR-L U>>BF BLK1U> U>>BLK1 Logic59 ≥1 & UL1 UL2 UL3 & State U ≥ U>>def U>>def Logic diagram concerning the second threshold (U>>) of the overvoltage element - 59

F_59-Char.ai Inverse time operating characteristic concerning the first threshold (U>) of the overvoltage element - 59 1.1 2 3 4 U /U >inv t U>inv= 100 s t U>inv= 10 s t U>inv= 1 s t U>inv= 0.1 s 1.5 0.01 0.1 1 10 100 1000 10000 t [s] Note: match of operating and setting time takes place when U/U>inv = 1.5 t =tU>inv · [(U/U>inv) - 1] 0.5

Residual overvoltage - 59N Preface Two operation thresholds, independently adjustable (UE>, UE>>) with adjustable delay (tUE>, tUE>>). The fundamental component of the residual voltage is computed, therefore the element is insensitive to the third harmonic components. The first threshold (UE>) can be programmed with definite or inverse time, while the second thresh- old operates with definite time characteristic. Each threshold may be separately enabled or disabled. The first threshold trip (UE>) may be inhibited by start of the second threshold (UE>>). Operation and settings Two measuring criteria of the residual voltage are provided: • Direct • Calculated. For direct measure the fundamental component of the residual voltage input is used (UE), whereas, for calculated measure (UEC) the residual voltage comes from a vector sum of three phase voltage phasors. The residual voltage (UE or UEC) is compared with the setting values (UE>, UE>>); a start is issued when the residual voltage overcomes the adjustable threshold (START); after expiry of the associ- ated operate time (tUE>, tUE>>) a trip command is issued; if instead the voltage drops below the threshold, the element is restored. The first threshold (UE>) may be programmed with definite or inverse time according the following characteristic curve: t=0.5 tUE>inv / [(UE/UE>inv) - 1] or t=0.5 tUE> inv / [(UEC/UE>inv) - 1] Where: UE: measured residual voltage UEC: calculated residual voltage t: operate time UE>inv: pickup value tUE>inv: operate time setting For the inverse time characteristic, following data applies: • The operate time setting is referred to an input voltage equal to 1.5 of the pickup value. • Asymptotic reference value (minimum pickup value): 1.1 UE>inv • Minimum operate time: 0.1 s • Range where the equation is valid: 1.1 ≤ UE/UE>inv (UEC/UE>inv) ≤ 4 • If UE>inv pickup ≥ 0.5 UEn, the upper limit is 2 UEn. The first residual overvoltage element can be programmed with definite or inverse time character- istic by setting the UE> Curve parameter (DEFINITE, INVERSE) available inside the Set \ Profile A(or B) \ Residual overvoltage-59N \ UE> Element \ Setpoints menu. For definite time characteristic the upper limit is 2 UEn. Each element can be enabled or disabled by setting ON or OFF the UE> Enable parameter inside the Set \ Profile A(or B) \ Residual overvoltage-59N \ UE> Element \ Setpoints menu and/or the State parameter inside the Set\Profile A(or B) \ Residual overvoltage-59N \ UE>> Element \ Definite time. Selection of the measuring criteria of the residual voltage (direct measure or calculated measure) is available inside the Set \ Profile A(or B) \ Residual overvoltage-59N \ Common configuration menu; The 3Votype59N parameter may be select as UE (direct measure) or UEC (calculated measure). With UE setting (direct voltage measurement), the thresholds are in p.u. UEn, with UEC setting (cal- UEC=|UL1+UL2+UL3| t-int-F59N.ai UE UE>> tUE> tUE>> UE> t General operation time characteristic for the residual overvoltage elements - 59N TRIP

culated voltage measurement), the thresholds are in p.u. UECn. For both measuring criteria, a block of the UE> and UE>> threshold may be select when the 74VT function is active (external by binary input). The blocking enabling parameter 74VText59N is avail- able inside the Set \ Profile A(or B) \ Residual overvoltage-59N \ Common configuration menu.[1] The first threshold trip (UE>) may be inhibited by start of the second threshold (UE>>) by setting ON the UE> Disabling by UE>> start (UE>disbyUE>>) parameter available inside the Set \ Profile A(or B) \ Residual overvoltage-59N \ UE>> Element \ Setpoints menu. An adjustable reset time delay is provided for every threshold tUE>RES, tUE>>RES. Both residual overvoltage elements (UE>, UE>>) can produce the Breaker Failure output if the UE>BF and UE>>BF parameters are set to ON. The parameters are available inside the Set \ Profile A(or B)\Residual overvoltage - 59N \ UE> Element (UE>> Element) \ Setpoints menus.[2] All the named parameters can be set separately for Profile A and Profile B (Set \ Profile A(or B) \ Residual overvoltage - 59N \ UE> Element (UE>> Element) \ Setpoints menus). For every of the two thresholds the logic block can be set. Logical block (Block1) If the UE>BLK1 and/or UE>>BLK1 enabling parameters are set to ON and a binary input is de- signed for logical block (Block1), the protection is blocked off whenever the given input is active. The trip timer is held in reset condition, so the operate time counting starts when the input block goes down.[3] The enabling parameters are available inside the Set \ Profile A(or B) \ Residual over- voltage - 59N \ UE> Element (UE>> Element) \ Setpoints menus, while the Block1 function must be Note 1 The operating time must be adjusted to a greater value than the 74VT activation time (internal or binary input) Note 2 The common settings concerning the Breaker failure protection are adjustable inside the Breaker Failure - BF menu. Note 3 The exhaustive treatment of the logical block (Block 1) function may be found in the “Logic Block” paragraph inside CONTROL AND MONITOR- ING section. all-F59N.ai Logic diagram concerning the residual overvoltage element - 59N UE UE> Element UE>> Element Start U>> Start UE>> Start UE> Trip UE> Trip UE>> & UE> disbyUE>> U> inhibition tUE> def tUE> inv UE>def tUE>> def tUE>>RES tUE>RES UE>>def UE> inv UE> Curve UE> Enable State Block1 BLK1UE> & UE>BLK1 Start UE> & Block1 BLK1UE>> & UE>>BLK1 Start UE>> & UE>BF Trip UE> & UE>BF & UE & 74VText-Block 74VText-Block 74VText-Block & 74VText UE Common configuration 3Votype59 N 74VText59 N UE (direct measure) UEC (calculated measure) Timers-F59N.ai UE> Start UE> Trip tUE> tUE> RESET INPUT tUE>RES tUE>RES tUE>RES t Timers concerning the first element of residual overvoltage protection- 59N

assigned to the selected binary input inside the Set \ Inputs \ Binary input IN1(2) menus (IN1 or IN2 matching). Fun-F59N_S1.ai Logic diagram concerning the first threshold (UE>) of the residual overvoltage element - 59N ≥1 UE> Inhibition (ON≡Inhibit) & UE> Curve 0 T RESET tUE> 0 T TRIPPING MATRIX (LED+RELAYS) tUE>def tUE>inv Start UE> UE>ST-K UE>ST-L Start UE> Trip UE> UE>TR-K UE>TR-L Trip UE> Trip UE> BF Enable (ON≡Enable) UE>BF towards BF logic & Block1 UE> 74VT ext. UE> BF & & & Enable (ON≡Enable) Block1 input (ON≡Block) Block1 Block1 Binary input INx (x=1, 2) T 0 Logic INx t ON INx t ON INx t OFF T 0 n.o. n.c. INx t OFF 74VText. Binary input INx (x=1, 2) T 0 Logic INx t ON INx t ON INx t OFF T 0 n.o. n.c. INx t OFF t UE>RES T 0 t UE>RES ON≡Enable UE> residual overvoltage element UE> Enable UE UE>def UE>inv ≥1 & State UE ≥ UE>def UE ≥ UE>inv & State UE>BLK1

Fun-F59N_S2.ai Logic diagram concerning the second threshold (UE>>) of the residual overvoltage element - 59N & RESET tUE>> 0 T TRIPPING MATRIX (LED+RELAYS) tUE>>def Start UE>> UE>>ST-K UE>>ST-L Start UE>> Trip UE>> UE>>TR-K UE>>TR-L Trip UE>> Trip UE>> BF Enable (ON≡Enable) UE>>BF towards BF logic & Block1 UE>> 74VT ext. UE>> BF & & & Enable (ON≡Enable) Block1 input (ON≡Block) Block1 Block1 Binary input INx (x=1, 2) T 0 Logic INx t ON INx t ON INx t OFF T 0 n.o. n.c. INx t OFF 74VText. Binary input INx (x=1, 2) T 0 Logic INx t ON INx t ON INx t OFF T 0 n.o. n.c. INx t OFF t UE>>RES T 0 t UE>>RES UE UE>>def & State UE ≥ UE>>def & (ON≡Inhibit) UE> Inhibition UE>disbyUE>> UE>>BLK1

F_59N-Char.ai Inverse time operating characteristic concerning the first threshold (UE>) of the residual overvoltage element - 59N 1.1 2 3 4 t UE>= 100 s t UE>= 10 s t UE>= 1 s t UE>= 0.1 s 1.5 0.01 0.1 1 10 100 1000 10000 t [s] Note: match of operating and setting time takes place when UE /UE>inv = 1.5 or UEC /UE>inv = 1.5 t =tUE>inv · [(UE /UE>inv) - 1] 0.5 t =tUE>inv · [(UEC /UE>inv) - 1] 0.5 UE /UE>inv UEC /UE>inv

Breaker failure - BF Preface When the protection issues a trip command but, because an anomaly, the circuit breaker cannot open, the breaker failure protection issues a back-up trip command to trip adjacent circuit breakers. The breaker failure function may be started by internal protective function (if associated with BF) or by external protections. Operation and settings The starting of the timer occurs if both the following conditions are filled: A) Start and trip of internal protective elements (trip of elements matched with BF protection) or, trip of external protections acquired by means binary input, if enabled. 1) The CB is closed (the CB state may be acquired by means two binary inputs connected to the auxiliary contacts 52a and 52b). If both conditions are held along the set operate time tBF, the BF element trips at deadline, vice versa the timer is cleared and the function is restored. To the purpose to restore the BF element as quickly as possible, with start of the same protection (see A condition), additionally to the trip of some internal protections, their starts are required (start reset is faster than trip reset). The element may be enabled or disabled by setting ON the BF Enable parameter available inside the Set \ Profile A(or B) \ Breaker failure-BF menu. Logical block (Block1) If the BF-BLK1 parameter (BF logical block) is set to ON, and a binary input is designed for logical block (Block1), the breaker failure protection is blocked off whenever the given input is active. The trip timer is held in reset condition, so the operate time counting starts when the input block goes down.[1] The enabling parameter are available inside the Set \ Profile A(or B) \ Breaker failure-BF menu, while the Block1 function must be assigned to the selected binary input inside the Set \ Inputs \ Binary input IN1(x) menus (IN1 or INx matching). BF start from Circuit breaker If the CB Input parameter (BF Start from circuit breaker) is set to ON, and two binary inputs are designed for acquire the 52a and 52b auxiliary contacts[2], the control of the CB position is enabled. If the information concerning the CB position is not available, such control must be disabled by setting OFF the CB Input parameter. The parameter is available inside the Set \ Profile A(or B) \ Breaker failure-BF menu, the 52a and 52b function must be assigned to the selected binary inputs inside Set \ Inputs \ Binary input IN1(x) menus (IN1 or INx matching). To enable the breaker failure protection to operate with trips coming from external protections, one binary input must be designed to acquire the relative contacts. The TripProtExt function must be assigned to the selected binary input inside the Set \ Inputs\Binary input IN1(x) menus (IN1 or INx matching). Note 1 The exhaustive treatment of the logic block (Block 1) function may be found in the “Logic Block” paragraph inside CONTROL AND MONITORING section Note 2 Both auxiliary contact state 52a and 52b must be acquired (two binary inputs are required). all-FBF.ai General logic diagram of the breaker failure element - BF Block1 BLK1 BF 52a/52b Trip ProtExt Start BF Trip BF Block1 & BF-BLK1 BF Enable t BF

Fun-BF_Pro-n.ai TRIPPING MATRIX (LED+RELAYS) Start BF Trip BF Trip int-prot & & Block1 input (ON≡Block) BLK1 BF Trip Int/Ext Block1 ON≡CB Closed Start BF Trip BF & Trip ProtExt 52a & Block1 nable (ON≡Enable) BF-BLK1 Block1 52a RESET tBF 0 T t BF ≥1 ≥1 Binary input INx (x=1...8-16) T 0 Logic INx t ON INx t ON INx t OFF T 0 n.o. n.c. INx t OFF Binary input INx T 0 Logic INx t ON INx t ON INx t OFF T 0 n.o. n.c. INx t OFF Binary input INx T 0 Logic INx t ON INx t ON INx t OFF T 0 n.o. n.c. INx t OFF 52b Binary input INx T 0 Logic INx t ON INx t ON INx t OFF T 0 n.o. n.c. INx t OFF 52b Logic diagram concerning the breaker failure element -BF BF-ST-K BF-TR-K BF-TR-L BF-ST-L

4.5 CONTROL AND MONITORING Logical block - BLOCK1 To the purpose to block off the trip of one protection element, the logical block function (Block1) may be matched with binary inputs.[1] The binary-matching may be set inside the Inputs submenu; to the purpose the Block1 parameter must be selected for INx matching (x=1, 2) A protective element, where the logical block is enabled, is blocked off whenever the given input is ON. For a given protective element, the logical block state is reading available (ThyVisor and communi- cation interfaces); it is ON the following condition are at the same time observed: • Binary input ON, • Element start ON, • Element Trip OFF. The logical block it is not liable for any inhibition time-out, so the protective element is disabled for the whole time when the input is ON.[2] Note 1 In the following treatment, the logical block is defined as “Logical block” or “Block1” Note 2 The Block 1 signal forces a timer reset Blocco_L.ai RESET Operate time 0 T Generic protective element Measure Input TRIPPING MATRIX (LED+RELAYS) BLK1xxx Operate time Threshold Start Start Trip Trip & & & Enable (ON≡Enable) Block1 input (ON≡Block) Customized Block1 info Block1 info (internal state) xxxBLK1 Block1 Block1 Binary input INx T 0 Logic INx t ON INx t ON INx t OFF T 0 n.o. n.c. INx t OFF Logic block - Block1 Start Block1 (input) Block1 (output) Trip Operate time t Timers-Block1.ai Logic block timers - Block1 Activation of any binary input assigned ti logic block (Block1) function effects a block of all the protective elements where the logic block is enabled CAUTION

Block1_L.ai Start Trip & & & Enable (ON≡Enable) (ON≡element inhibition) Customized Block1 info Reset timers Block1 info (internal state) xxxBLK1 Block1 UBLK1 59 element U>>BLK1 59 element UE>BLK1 UE>>BLK1 59N element 59N element 74TCSBLK1 74TCS element BFLK1 BF element Block1 Binary input INx T 0 Logic INx t ON INx t ON INx t OFF T 0 n.o. n.c. INx t OFF Logic diagram concerning the logic block element -Block1

Remote tripping Preface Some output relays may be programmed for remote trip function resulting from a command coming from a binary input. If a binary input is designed for remote trip acquisition, an output relay allocated to the same function is triggered when the input (IN1 and/or IN2) is active. Operation and settings The Remote trip matching must be assigned to the selected binary inputs inside the Set \ Inputs \ Binary input1 or Set \ Inputs \ Binary inputx menus. When a binary input is programmed for remote trip acquisition, the IN1 tON, IN2 tON, IN1 tOFF and IN2 tOFF time delays must be reset to zero; the Logic parameters (ON/OFF) must be pro- grammed in the same way of the related circuit connected with-it. The RemTrip-K matching must be assigned to the selected output relays inside the Set \ Remote tripping submenu; the same for addressing the LED indicators (RemTrip-L). When output relays are programmed for remote tripping, the tTR time delays must reset to zero; the operation mode must be set with self reset (No-latched inside Set \ Relays submenu) and the Logic parameters (Energized/De-energized) must be programmed in the same way of the related binary input connected with-it. All the parameters are common for A and B Profiles. Fun-Remote-trip.ai Remote trip +UAUX -UAUX Remote trip Binary input INx RemTrip-K RemTrip-L T 0 INx t ON T 0 n.o. n.c. INx tON Logic INx tOFF INx t OFF TRIPPING MATRIX (LED+RELAYS) Remote trip Remote tripping logic diagram

Frequency tracking Within the frequency range 45...55 Hz (fn = 50 Hz). or 54...63 Hz (fn = 60 Hz), a frequency tracking al- gorithm adjusts the currents sampling frequency, so as to keep the number of samples in any given period constant. With 24 samples for periods the sampling rate is adjusted from 1.08 kHz with f = 45 Hz to 1.512 kHz with f= 63 Hz. For a frequency step change the tracking response time is 1 Hz/s. The frequency measure is based on the largest voltage input. • If the larger input voltage is lower than 1.5 % En the sampling frequency is fixed to fn (50 or 60 Hz). • If the measured frequency is outside the locking range, the sampling frequency is fixed to the lower or upper value (45 or 55 Hz with fn = 50 Hz, 54 or 63 Hz with fn = 63 Hz). All protective elements are always operative; accuracy is guaranteed inside locked frequency band. Displayed value Locked frequency Locked frequency (Displayed value) Frequency tracking U L1 U L2 U L3 Max U L1...L3 > 0.015 En IF.ai Frequency tracking 1.5% En 16 20 90 63 f (Hz) 50 Hz (0 Hz) Frequenza nominale fn = 50 Hz Max U L1...L3 16 Hz 20 Hz 90 Hz 63 Hz

Trip circuit supervision - 74TCS Preface The trip circuit can be monitored to signal possible anomalies that would lead to the missing opening of circuit breaker when trip and/or operator command are issued. Circuit interruption as well as missing of auxiliary voltage and/or coil faults are detected. Supervision with one or two binary inputs can be select; depending on association of binary inputs, the corresponding logic is automatically selected. For this purpose the TCS1 and TCS2 (if two binary input are used) matching must be assigned to the selected binary inputs inside the Set \ Inputs \ Binary input IN1 and Set \ Inputs \ Binary input INx menus. When a binary input is programmed for the TCS function, the IN1 tON, INx tON, IN1 tOFF and INx tOFF time delays must be reset to zero and the Logic parameter must be set to Active-ON inside the Set \ Inputs \ Binary input IN1 and Set \ Inputs \ Binary input INx menus. Operation and settings The 74TCS element may be enabled or disabled; to enable it, the 74TCS Enable parameter must be set to ON inside the Set \ Profile A(B) \ Trip circuit supervision-74TCS submenu. A logic block can be set from une binary input.[1] If the 74TCS-BLK1 parameter is set to ON, and a binary input is designed for logical block (Block1), the TCS supervision function is blocked off whenever the given input is active. The trip timer is held in reset condition, so the operate time counting starts when the input block goes down. The 74TCS- BLK1 parameter is available inside the Set \ Profile A(B) \ Trip circuit supervision-74TCS submenu. All the parameters can be set separately for Profile A and Profile B. Two inputs supervision With two binary input all malfunctions are detected (inclusive of mechanics faults). The binary inputs are connected to the trip and to the 52b contacts. The CB auxiliary voltage must be 36 V at least (twice the minimum threshold for every binary input). The faulty condition is detected occurs if both the following conditions are filled: A) The TRIP contact is closed (external protection relay tripped); B) The circuit breaker is closed (52a closed and 52b open). Because such conditions can arise with healthy circuit too (e.g. a trip command is issued by the protection relay but the CB opening time is still in progress), to avoid untimely operations the previ- ous condition are checked every 80 ms and the output is issued after a 2 s delay; outputs are reset to zero if at least the A or B condition become false after 0.6 s delay.[2] Note 1 Since two binary inputs are just used (TCS1 and TCS2), an external I/O module is required for the logic block function. The exhaustive treatment of the logic block (Block 1) function may be found in the “Logic Block” paragraph inside CONTROL AND MONITORING section Note 2 Following assumption are considered for the framework: Logic: ON, Timers tON and tOFF: reset to zero TRIP contact of the protection: DE-energized, No latched TCS2s.ai TRIP +UAUX Trip circuit supervision with two binary inputs - 74TCS -UAUX 52a 52b 52 PRO-N Binary input IN1 Binary input IN2 TCS1 TCS2 Towards 74TCS logic Towards 74TCS logic

One input supervision By means of the right sizing of a resistor, the trip circuit supervision may be performed even with lower control voltage (e.g. when the control voltage is less than 36 V required for driving of two binary inputs, typically UAUX = 24V). The binary input is connected to the trip and an external resistor must be connected the 52b auxiliary contact. The fault condition of the trip circuit is detected by binary input power down. With healthy circuit and TRIP contact closed, the binary input is feed across the 52a path (CB closed) or across the resistor R and 52b path (CB open). When the TRIP contact turns ON, the binary input becomes short-circuited; to avoid untimely opera- tions the previous condition are checked every 80 ms and the output is issued after a 40 s delay in order to allow the fault clearing and the consequent reset of the TRIP protection. Outputs are reset to zero after 6 s from the TRIP contact open.[1] Note 1 The trip contact (TRIP) of the protection relays must be set with automatic reset (No-latched operating mode). TCS1.ai TRIP R +UAUX -UAUX 52a 52b 52 Pro-N Binary input INx TCS1 Towards 74TCS logic Trip circuit supervision with one binary inputs - 74TCS Fun-74TCS2.ai 0 2 s T 0 0.6 s T & & Enable (ON≡Enable) 74TCS Enable RESET TRIPPING MATRIX (LED+RELAYS) Start 74TCS Trip 74TCS & & Block1 input (ON≡Block) BLK1 74TCS Block1 Start 74TCS 74TCS-ST-K 74TCS-ST-L 74TCS-TR-K 74TCS-TR-L Start 74TCS Trip 74TCS Trip 74TCS TCS1 TCS2 & Enable (ON≡Enable) 74TCS-BLK1 Block1 T Binary input INx T 0 Logic INx t ON INx t OFF INx t ON T 0 n.o. n.c. INx t OFF T Binary input INx T 0 Logic INx t ON INx t OFF INx t ON T 0 n.o. n.c. INx t OFF T Binary input INx T 0 Logic INx t ON INx t OFF INx t ON T 0 n.o. n.c. INx t OFF Logic diagram concerning the trip circuit supervision with two binary inputs - 74TCS

How to calculate resistance Both the following conditions must be filled: 1) The circuit breaker coil must no be powered when the CB is open and an open command is is- sued; 2) The binary input is energized when the trip contact open. 1) If the circuit breaker is just open an unnecessary excitation must be avoided; the most critical event arises when the TRIP contact is closed (e.g. manual or test command), so with minimal series resistance. To avoid an unwanted excitation the series resistance must be higher than a minimum value defined as: Rmin = RTC · (UAUX - UTCmin) / UTCmin where: UTCmin: minimum coil excitation voltage UAUX: auxiliary voltage RTC: coil resistance 2) To energize the binary input circuit when the TRIP contact and CB open, the series resistance must be lowerer than a maximum value defined as: Rmax = [(UAUX - UDIGmin) / IDIG] - RTC where: UDIGmin: minimum binary input excitation voltage (18 V) UAUX: auxiliary voltage RTC: coil resistance IDIG: binary input excitation current (0.003 A) To satisfy the above requirements, the R value must be chosen between the Rmin and Rmax values; typically the normalized value nearest the arithmetic mean: R = (Rmin + Rmax) / 2 The power dissipated by the R resistor is: PR = R · I 2 = R · [UAUX / (R + RTC)] 2 Example UAUX = 110 Vcc (auxiliary voltage) PTC = 50 W (coil power) RTC = UAUX2 / PTC = 242 Ω (coil resistance) UTCmin = 77 V (minimum coil excitation voltage = 70% UAUX ) UDIGmin = 18 V (minimum binary input excitation voltage) IDIG = 0.003 A (binary input excitation current) Rmin = RTC · (UAUX - UTCmin) / UTCmin = 242 · (110 - 77) / 77 = 103.7 Ω Rmax = [(UAUX - UDIGmin) / IDIG] - RTC = [(110 - 18) / 0.003] - 242 = 30425 Ω R = (Rmin + Rmax) / 2 = (103.7 + 30425) / 2 = 15264 Ω ~ 15 k Ω PR (Power dissipated by the R resistor) = UAUX2 /R = 1102 / 15000 = 0.8 W Fun-74TCS1.ai 0 40 s T 0 6 s T & Enable (ON≡Enable) 74TCS Enable RESET TRIPPING MATRIX (LED+RELAYS) & & Block1 input (ON≡Block) Block1 Start 74TCS Start 74TCS Trip 74TCS Trip 74TCS TCS1 & Enable (ON≡Enable) Block1 Binary input INx T 0 Logic INx t ON INx t ON INx t OFF T 0 n.o. n.c. INx t OFF Binary input INx T 0 Logic INx t ON INx t ON INx t OFF T 0 n.o. n.c. INx t OFF Start 74TCS Trip 74TCS BLK1 74TCS 74TCS-BLK1 74TCS-ST-K 74TCS-ST-L 74TCS-TR-K 74TCS-TR-L Logic diagram concerning the trip circuit supervision with one binary inputs - 74TCS

Circuit breaker supervision Preface Several diagnostic metering and monitoring function are available: • By means 52a and 52b auxiliary contacts, the CB position is acquired. Depending on such information the Open and/or Close commands can be safely issued by user. • An adjustable threshold can be set for a wear estimate of the breaker contacts; the current values (SI or SI2) are summed and compared to a user-adjustable threshold. When the threshold or the number of operations is exceeded the relay can activate an output relay. The function helps to adjust maintenance planning. • By means 52a and 52b auxiliary contacts, the opening time is calculated and compared to a user-ad- justable threshold. If the threshold is exceeded the relay can activate an output relay. Operation and settings According to the conventional contact position • 52a is the auxiliary contact that is in the same position as the circuit breaker, (52a open = CB open), • 52b is the auxiliary contact that is in the opposite position as the circuit breaker, (52a open = CB closed). To acquire the CB position, the 52a and 52b function must be set inside the Set\Inputs\Binary input 1 and Set\Inputs\Binary input 2 menus. The IN1 tON, IN2 tON, IN1 tOFF and IN2 tOFF time delays must be reset to zero and the Logic parameter must be set to Active-ON inside the Set\Inputs\Bi- nary input IN1 and Set\Inputs\Binary input IN2 menus. CIRCUIT BREAKER COMMANDS Two output relays can be set to command CB opening and closing; the CBopen-K and CBclose-K function must be set inside the Set\Circuit breaker supervision\LEDs-relays allocation menu; the CB position can be visualized by means two LEDs (CBopen-L and CBclosed-L parameters). All the parameters are common for Profile A and Profile B. CIRCUIT BREAKER DIAGNOSTIC Four different criteria can be select. 1) Number of CB trip mode (ModeN.Open ON). When the number of operations (N.Open) is ex- ceeded, an output relay and/or LED can be activated. 2) Cumulative CB currents mode (ModeSumI ON). When the per-phase value exceeds the thresh- old, an output relay and/or LED can be activated. 3) Cumulative CB I2t mode (ModeSumI^2t ON). The tripping energy I2t is calculated on the base of current measure at the time of the open command on the base of the circuit breaker opening time provided for I2t calculation (tbreak). When the per-phase value exceeds the threshold, an output relay and/or LED can be activated. 4) CB operating time mode (Mode-tOpen ON). The time interval between the trip command and the CB open acquisition is calculated on the base of a programmable relay (Ktrig-break). When the time interval (tbreak>) is exceeded, an output relay and/or LED can be activated. The four criteria can be contemporaneously or separately set. All the named parameters are available inside the Set\Circuit Breaker supervision\CB Diagnostic menu. Fun-CB-position.ai Logic diagram concerning the circuit breaker diagnostic function Towards CB diagnostic TRIPPING MATRIX (LED) 52a ON/OFF t mask 0 T t mask CB monitoring Opening transition 52b ON/OFF 52a 52 52b +UAUX -UAUX IN- IN+ 52a IN- IN+ 52b Binary input INx T 0 INx t ON T 0 n.o. n.c. INx tON Logic INx tOFF INx t OFF Binary input INx T 0 INx t ON T 0 n.o. n.c. INx tON Logic INx tOFF INx t OFF =1

Fun-CB-diagnostic.ai CB Diagnostic - Number of trips CB Diagnostic - CB operating time From CB position N.Open-K N.Open-L tbreak-K tbreak-L TRIPPING MATRIX (LED+RELAYS) TRIPPING MATRIX (LED+RELAYS) State N.Open t break Opening transition ≥ N.Open Mode-N.Open & From CB position Opening transition ≥ Mode-tOpen Ktrig-break & State tbreak

— Virtual I/O Preface By ThyVisor and ThyVisor software tools the type of operation and links between outputs (Virtual Output - VOUT1 ... 16) and virtual inputs (Virtual Inputs - VIN1 ... VIN32) may be defined using RPC or IEC 61850 communication protocols over Ethernet network. The system allows:[1] • Availability of sixteen inputs and thirty-two outputs independently programmable by the user • Simplify wiring using one channel as the Ethernet • Eliminate the need to install communication devices and / or external conversion • Significantly reduce costs • Dynamically change from sw connections and associated functions. Applications With Pro-N and Pro-XX relay the virtual I / O can be usefully employed for: • Transmit information between protections installed in significant distance where the traditional connections are critical in terms of reliability. • Making OR logic for opening control of multiple DDI (simultaneous control of all DDI operated by each SPI) in cases of multiple interface protections (Smart Grids) • Achieve accelerated logic discrimination in which some protection elements can be blocked by the activation of the downstream protection start; this allows to reduce the clearing time that, in time logic systems require trip time significantly long in correspondence of the power source. • Circuit breaker commands • Selection of setting profiles • Remote trip • Include I / O in the programmable logic (PLC) • etc. .. Note 1 For a detailed description please refer to the application notes - Funzioni di protezione e controllo 27 Minima tensione 27V1 Minima tensione di sequenza diretta 59 Massima tensione 59V2 Massima tensione di sequenza inversa 59N Massima tensione residua 59Uavg Massima tensione mediata 81O Massima frequenza 81U Minima frequenza 81R Derivata di frequenza BF Mancata apertura interruttore 74TCS Monitoraggio del circuito di apertura dell’interruttore ARF Richiusura automatica per fotovoltaico (opzionale) PROTECTION RELAY Pro-N & Pro-NX IN32 OUT1 OUT2 OUT... OUT16 IN... IN3 IN2 IN1 PROTECTION RELAY Pro-N & Pro-NX IN32 OUT1 OUT2 OUT... OUT16 IN... IN3 IN2 IN1 freely customizable connections

Oscillography Trigger Setup Following parameters, available inside the Set \ Oscillography \ Trigger Setup menu, are user-pro- grammable: • Pre-trigger time and Post-trigger time. • Element pickup trigger; the information recording starts when a state transition on any protec- tive element occurs if the parameter is set to ON. • Trigger from outputs; the information recording starts when a state transition on the selected output relay occurs if the parameter is set (K1...K6). • Binary input trigger; the information recording starts when a state transition on the selected binary input occurs if the parameter is set to ON. • Trigger from inputs; the information recording starts when a state transition on the selected binary input occurs if the parameter is set (IN1...INx). • 80% Buffer alarm; when the 80% of the buffer space is reached an alarm may be issued if the parameter is set to ON. Set sampled channels The desired sampled quantities may be select inside the Set \ Oscillography \ Set sampled channels menu (uL1, uL2, uL3, uE). Set analog channels The desired sampled quantities may be select inside the Set \ Oscillography \ Set analog channels menu. Everyone of twelve analog channel may be associated to one of the selected measures (Frequency, UL1, UL2, UL3, UE, UEC, df/dt, T1...T8[1]). Set digital channels The desired digital quantities may be select inside the Set \ Oscillography \ Set digital channels menu. Everyone of twelve digital channel may be associated to one of the selected I/O signal (K1... K6, K7... K10, IN1, IN2, IN3...IN42[2]). Nota 1 The 26 menu is available when the MPT module is enabled Nota 2 The output relay K7...K10 and binary input IN3...IN42 states is meaningful when the I/O circuits are present (MRI and MID16 modules) trigger.ai Trigger oscillography Trigger Time pre-trigger post-trigger

71 NV10B - Manual - 04 - 2022 5 M E A S U R E S , L O G I C S TAT E S A N D C O U N T E R S 5 M E A S U R E S , L O G I C S TAT E S A N D C O U N T E R S Measures Direct • Frequency (f ) • Phase voltages RMS value of fundamental component (UL1, UL2, UL3) • Residual voltage RMS value of fundamental component (UE) Calculated • Maximum voltage between UL1-UL2-UL3 (ULmax) • Average voltage between UL1-UL2-UL3 (UL) • Calculated residual voltage (UEC) • Negative sequence voltage (U2) • Third harmonic of residual voltage (UE-3rd) Protection For each protection threshold, the following data are available: • Start ON/OFF • Trip ON/OFF • Logic block (Block1) ON/OFF • Selective block (Block2) ON/OFF • Cold Load Pickup ON/OFF Delayed inputs The binary input states, acquired downstream the delay timers are available: • IN1 ON/OFF • IN2 ON/OFF Internal states The state of the functions assigned to binary inputs are available (Read\Internal states): • Reset LEDs ON/OFF • Profile selection ON/OFF • Fault trigger ON/OFF • Block1 ON/OFF • Tcs1 ON/OFF • Tcs2 ON/OFF • Trip External protections ON/OFF • Reset partial counters ON/OFF • Reset CB monitoring data ON/OFF • 52a ON/OFF • 52b ON/OFF • Open CB ON/OFF • Close CB ON/OFF • Thermal image presetting ON/OFF • Remote trip ON/OFF • 74VT ext. ON/OFF Relays For every output relay, the output operating state and diagnostic are available (Read \Relays menu): • K1 State ON/OFF • K1 Diagnostic OK/NOT OK • K2 State ON/OFF • K2 Diagnostic OK/NOT OK • ...... • K6 State ON/OFF • K6 Diagnostic OK/NOT OK Counters For every element two set of counters are available (Partial counters and Total counters); the partial counters can be cleared by the user level, while the Total counter reset can be achieved with pass- word (Session Level 1). Every partial counter is reset to zero when ten thousand count is passed. All partial counters can be cleared by means a single command; for this purpose the Reset partial counters command must be issued (Commands \ Reset submenu). • 27 - Counters • 59 - Counters • 59N - Counters • 74TCS - Counters • CB - Counters • BF - Counters

72 NV10B - Manual - 04 - 2022 Partial counters • xx Start partial counter (xx = I>, I>>,...) 0...9999 • xx Trip partial counter (xx = I>, I>>,...) 0...9999 • xx Block1 partial counter (xx = I>, I>>,...) 0...9999 • xx Block2 partial counter (xx = I>, I>>,...) 0...9999 Total counters • xx Start total counter (xx = I>, I>>,...) 0...9999 • xx Trip total counter (xx = I>, I>>,...) 0...9999 • xx Block1 total counter (xx = I>, I>>,...) 0...9999 • xx Block2 total counter (xx = I>, I>>,...) 0...9999 Self test Lower level diagnostic (MINOR) can be output or ignored; for this purpose the MINOR Fail alarm parameter can be set ON or OFF inside the Set\Self test relay submenu. Following anomalies (MINOR) are not relevant (the protective elements continue to work): • Errors concerning the digital fault recorder. • Internal bus. The self test information are: • Protection and controls ON SERVICE/OUT OF SERVICE • System diagnostic OK/NOT OK • Device diagnostic OK/NOT OK • Program diagnostic OK/NOT OK • Data-base boot OK/NOT OK • Data-base runtime OK/NOT OK • DSP boot OK/NOT OK • DSP run-time OK/NOT OK • Memory boot OK/NOT OK • Memory run-time OK/NOT OK • Data Bus heavy OK/NOT OK • Data Bus minor OK/NOT OK • Oscillography run-time OK/NOT OK • PLC boot OK/NOT OK • PLC run-time OK/NOT OK • Protection I/O assigned verify startup OK/NOT OK • Protection I/O assigned verify run-time major OK/NOT OK • Protection I/O assigned verify run-time minor OK/NOT OK • Total protection I/O assigned not-matching 0 • Protection I/O assigned not-matching • PLC I/O assigned not-matching OK/NOT OK • PLC I/O assigned not-matching run-time major OK/NOT OK • PLC I/O assigned not-matching run-time minor OK/NOT OK • Total PLC I/O assigned not-matching 0 • PLC I/O assigned not-matching • MMI module Boot OK/NOT OK • MMI module Run-time OK/NOT OK • MRI module Boot OK/NOT OK • MRI module Run-time OK/NOT OK • MID16-1 module Boot OK/NOT OK • MID16-1 module Run-time OK/NOT OK • MID16-2 module Boot OK/NOT OK • MID16-2 module Run-time OK/NOT OK • PT100 module Boot OK/NOT OK • PT100 module Run-time OK/NOT OK • Current loop module Boot OK/NOT OK • Current loop Run-time OK/NOT OK • Oscillography run-time OK/NOT OK The diagnostic alarms can be allocated to an output relay; for this purpose the Self-test relay pa- rameter can be set (K1...K6) inside the Set \ Self-test Relay submenu. Fault recording - SFR Recording is triggered by one or more causes (up to 8 simultaneous): • Activation (OFF-ON transition) of any relay programmed for trip of protection or control element • External trigger (binary input programmed as Fault trigger) Twenty events are recorded into a circular FIFO (First In, First Out) buffer.[1][2] Following information are stored in every record: • Fault counter[3] • Date and time • Fault cause (element trip) • Input voltages UL1r, UL2r, UL3r • Measured residual voltage UEr • Calculated residual voltage UECr Note 1 Fault 0 is the newest fault, while the Fault 19 is the oldest fault Note 2 Data are stored in non volatile memory; they are held in spite of power down Note 3 Counter is updated at any new record; it may be cleared by means ThyVisor

73 NV10B - Manual - 04 - 2022 • Frequency fr • Inputs • Outputs • Fault cause info (eg. faulted phase) Event recording - SER Recording is triggered by one or more causes: • Start and/or trip of any enabled protection or control element • Binary input activation (OFF-ON or ON-OFF transition) • Power-on or power-down (Auxiliary power supply) • Setting change. Three hundred events are recorded into a circular FIFO (First In, First Out) buffer.[2][1] Following information are stored in every record: • Event counter[2] • Date and time • Event cause (binary input/element trip/setting change) Oscillography - DFR Upon programmable trigger, the fault records are recorded in COMTRADE format; the sampled mea- sures (24 sample per cycle) are stored in a circular shift memory buffer. The fault record are self-triggered; they are stored in sequential order up the allocated memory is used up after which the oldest memory is overwritten. An operating procedure example for the digital fault recording is illustrated inside the ThyVisor sec- tion. Following parameters are user-programmable: • Pre-trigger and post-trigger time • Selected sampled quantities. • Analog channels (1...12) allocation. • Digital channels (1...12) allocation (output relay and/or binary inputs). • Trigger setup; the information storage starts when a state transition on the selected signal occurs. (protective element start and/or trip, output relay and/or binary input switching). • Alarm: when the 80% of the buffer space is reached an alarm may be issued. The system being of linear type, the records are back-to-back recorded to the end of available memory; the alarm out- put is a warning in order that the user may download data[3] to clear memory for new records. Following parameters are user-programmable: Sample channels • Instantaneous value for input voltages uL1, uL2, uL3 • Instantaneous value for residual voltage uE Analog channels • Frequency f • Fundamental component for input voltages UL1, UL2, UL3 • Fundamental component for measured residual voltage UE • Fundamental component for calculated residual voltage UEC Digital channels • Binary inputs • Output relays COMTRADE Records are recorded in COMTRADE format; (Common Format for Transient Data); This is a standard for the data exchange for various types of tests or simulation datas, etc, for power system applica- tions. The measurements are recorded in ASCII or BINARY format. COMTRADE files always come by pairs: • The “.CFG”-file describing the configuration: number of analog and digital channels, sampling rate, scale factors, etc. • The “.DAT”-file containing the data The COMTRADE is part of IEC 60255-24 standard. The recording can be analyzed by mean of ThyVisor sw or any other standard compliant viewer. Note 1 Event 0 is the newest event, while the Event 299 is the oldest event Note 2 Counter is updated at any new record; it may be cleared by means of ThyVisor Note 1 Data are stored into non-volatile memory; they are retained once power is turned off. trigger.ai Trigger oscillography Trigger Time pre-trigger post-trigger

74 NV10B - Manual - 04 - 2022 The record quantity is depending on settings of following parameters: • Pre-trigger and post-trigger times • Number of allocated channels. By means of the following formula the record quantity may be evaluated: where: • N record quantity • vi sampled measures • vRMS analog measures (RMS) • nB logic variables (2 up to 16 variables) • tpre pre-trigger time interval • tpost post-trigger time interval • f frequency Example 1 With the following setting: • Pre-trigger: 0.25 s • Post-trigger: 0.25 s • Sampled measures: uL1, uL2, uL3, uE • Analog measures: UL1, UL2, UL3, UE • Logic variables: K1, K2, K3, K4, K5, K6, IN1, IN2 up to 180 record can be stored if f = 50 Hz, since: Example 2 With following setting: • Pre-trigger: 0.5 s • Post-trigger: 0.5 s • Sampled data: uL1, uL2, uL3, uE • Analog measures: UL1, UL2, UL3, UE • Digital channels: K1, K2, K3, K4, K5, K6, IN1, IN2 up to 75 records can be stored if f = 60 Hz, since: N = int (34 + 20 vi + 4 vRMS + nB)· 12000 (tpre + tpost )(s) · f (Hz) 50 (Hz) = 180 (34 + 20 · 4 + 4 · 4 + 2) · (0.25 + 0.25) N = int 12000 · 50 (Hz) 50 (Hz) = 75 (34 + 20 · 4 + 4 · 4 + 2) · (0.50 + 0.50) N = int 12000 · 50 (Hz) 60 (Hz) thysetter37a.ai Phase/to/phase fault record

6 I N S TA L L AT I O N 6 I N S TA L L AT I O N 6.1 PACKAGING Packaging consists of a polystyrene foam packaging guaranteeing adequate protection for transport and storage under normal environmental conditions. The Pro_N protection relays must be stored within the required temperature limits; the relative hu- midity should not cause condensation or formation of frost. It is recommended that the devices are stored in their packaging; in the case of long storage, espe- cially in extreme climatic conditions. It is recommended that the packaging not be disposed of into the environment, but kept in case the relay should be moved at some later time. 6.2 MOUNTING The Pro_N protection relays are housed inside metal cases suitable for various kinds of assembly: • Flush mounting • Projecting mounting • With separate operator panel • 19 “ Rack. Removability is ensured to facilitate maintenance operations so that the electronic module can be replaced; this provides minimum downtime and maximum protection availability. Flush mounting The fixed case, fitted with special fastening brackets, is mounted on the front of electric control board, previously drilled as indicated in the drawing. In case of side-by-side mounting of several relays the minimum drilling distance is determined by the front dimensions indicated in the overall dimensions drawing, increased by 3 mm, to ensure an adequate tolerance and gasket space between adjacent relays. The depth dimension, as indicated in the drawing, must be increased by as much as needed to allow room for the wiring. F1 D1 RX TX F2 F3 F4 F5 A1 A2 A3 A4 A5 A6 A7 A8 A9 A10 A11 A12 A13 A14 A15 A16 A17 A18 A19 A20 A21 A22 B1 B2 B3 B4 B5 B6 B7 B8 C1 C2 C4 C3 C5 C6 C7 C8 E1 171 205 149 30 101 N.4 holes ø 3,5 102.5 ±0.3 70 161 154 Flush-mount.ai Flush mounting 107 177 ON 4 1 3 2 5 TRIP START NOTE Separation of fixed and removable parts is NOT required

• Remove the upper tile and open the little door to access the fastening screws. • The fixed case is fastened by means of four screws onto the panel as indicated in the drawing. Projecting mounting • Remove the ground screw and open the little door to access the fastening screws. In case of side-by-side mounting of several relays, the minimum fixing distance is determined by the dimensions of the mounting plate indicated in the overall dimensions drawing, increased horizontally and vertically by as much as needed to allow room for the wiring and to ensure an adequate toler- ance between the apparatus. Remove-tile.ai Removing tie to access the fastening screws Flush-mount1.ai Four screws Projecting mounting Projecting.ai ON 3 2 1 5 4 TRIP START 120 80 31 275

Separate operator panel The solution with projecting assembly and a separate operator panel is particularly suitable for limited in depth installations. Cutout dimension and mounting steps concerning the separate operator panel are the same for the flushing mounting (see previous pages). A standard direct shielded cable with RJ45 connectors must be used for connections. Separate-mount.ai Separate operator panel F1 D1 RX TX F2 F3 F4 F5 A1 A2 A3 A4 A5 A6 A7 A8 A9 A10 A11 A12 A13 A14 A15 A16 A17 A18 A19 A20 A21 A22 B1 B2 B3 B4 B5 B6 B7 B8 C1 C2 C4 C3 C5 C6 C7 C8 E1 128.5 110 200 168 20 30 5 15 25 212.5 170 107 177 ON 4 1 3 2 5 TRIP START N.4 holes ø 4,5 Separate-mount1.ai

Rack mounting For mounting inside a standardized 19-inch system (EIA 310-D, IEC 60297 and DIN 41494 SC48D), the MAR adapter is required (frame available on request). To allow opening of the keyboard door a one unit space must be provided when several rack are overlapping mounted. Rack-mount.ai Rack mounting 177 (4U) 101.6 482.6 465 ON 4 1 3 2 5 TRIP START ON 4 1 3 2 5 TRIP START ON 4 1 3 2 5 TRIP START ON 4 1 3 2 5 TRIP START

6.3 ELECTRICAL CONNECTIONS Electrical connections should be made by referring to the connection diagram; in cases where cer- tain of the circuits (communication, block, or others) are not used, the relevant connections must remain open. Examples of connection diagrams are reported on Appendix to this manual. A protective ground connection is required, which must be connected to the suitable screw with a separate lead of at least 2.5 mm2. Screw terminals are available for the connections, the use of terminals is recommended. For the A1...A22 connections, screw terminals with following characteristics are available: • Nominal cross section: 0.14...2.5 mm2 (AWG 26...16) for single conductor da 0.14 a 0.75 mm2 for two conductors with same cross section • Tightening torque: 0.5-0.6 Nm • Stripping length: 8 mm For the B1...B8 connections, screw terminals with following characteristics are available: • Nominal cross section: da 0.2 a 2.5 mm2 (AWG 24...12) for single conductor da 0.2 a 1.5 mm2 for two conductors with same cross section • Tightening torque: 0.5-0.6 Nm • Stripping length: 7 mm For the F1...F5 (RS485) connections, screw terminals with following characteristics are available: • Nominal cross section: da 0.2 a 2.5 mm2 (AWG 24...12) for single conductor da 0.2 a 1.5 mm2 for two conductors with same cross section • Tightening torque: 0.5-0.6 Nm • Stripping length: 10 mm. A protective ground connection is required, which must be connected to the suitable screw with a separate lead of at least 2.5 mm2. Devices must be installed by qualified personnel only. No liability is accepted from Thytronic due to improper use. CAUTION F1 D1 RX TX F2 F3 F4 F5 A1 A2 A3 A4 A5 A6 A7 A8 A9 A10 A11 A12 A13 A14 A15 A16 A17 A18 A19 A20 A21 A22 B1 B2 B3 B4 B5 B6 B7 B8 C1 C2 C4 C3 C5 C6 C7 C8 E1 RJ45 Ethernet plug RS485 RJ45 Thybus plug Voltmetric inputs UAUX A1 ≅ A2 A6 A7 A8 K2 A9 A10 A11 K3 K4 A3 A4 A5 K1 A12 A13 A14 K5 K6 A15 A16 A17 B- A+ A18 A19 IN2 IN1 A20 A21 A22 rear.ai Earthing Ground screw

The dry input circuits, despite being galvanically isolated, must preferably be supplied with the same auxiliary voltage of the control panel. The inputs are polarity free with wide voltage range. The optoisolated inputs are immune to transitory interferences, however the following recommenda- tion must be considered in high disturbed environments: • Position input wiring away from high energy sources. • Set a debounce timer (tON and/or tOFF) to alloy the transient to decay. • Use shielded cables with ground connection on only one end (preferably at the relay side. Output relays Six output relays are available. It is advisable to verify that the technical characteristic of the contacts be suitable for the applied load (about current, nominal voltage, make and break current , etc..). Output relay K1 and K2 have one change over contacts (SPDT, type C). Output relay K3 and K4 have one make contact (SPST-NO, type A) and a common reference (A10 terminal). Output relay K5 and K6 have one make contact (SPST-NO, type A for K5), one break contact (SPST- NC, type B for K6) and a common reference (A13 terminal). All contacts are shown in de-energized state for standard reference. For all diagrams the output contacts are shown in de-energized state for standard reference. USB port The link from PC and NV10 USB port must be established by the calbe L10042 (USB Type B - Type A) After installation, the same communication port must be selected to define the ThyVisor parameters (typically COM4, COM5,...). Binary-sch.ai Binary inputs +UAUX -UAUX A19 A20 IN1 A B A21 A22 IN2 It is advisable to verify that the technical characteristic of the contacts be suitable for the applied load (about current, nominal voltage, make and break current , etc..). CAUTION

Ethernet port One RJ45 (copper) or FX (optics fiber) port may be provided. Connections to the TX (RJ45) port must be made with shielded cable FTP Cat.5e category or higher. For testing a PC may be directly connect to the Ethernet port (D1) on the rear side. With TX interface a cross cable must be employed, while an Ethernet-optical fiber converter, suit- able for 100 Mb data rate must be employed if an FX port is implemented. The link must be enabled by means ThyVisor sw and USB connection: • Set the IP address (Host IP address e IP net mask) in order that the NA10 and PC parameters are matched; the parameters are inside the Communication \ Ethernet submenu. • Set to OFF the Autonegotiation parameter of NA10 device (Autonegotiation parameter inside Communication \ Ethernet submenu). For security reasons, a change of the Ethernet communication parameters become active only after ethernet-wiring.ai shielded cable - FTP Cat.5e TX connector (RJ45 copper) FX connector (optical fiber) RX TX

an hw reset. RS485 port RS485 communication circuit connections must be made using screened twisted pair cable observ- ing the polarities; screening must only be connected to the end terminating at the RS485 interface circuit pertaining to the monitoring unit. It is recommended to terminate the line at the extremities of the same; this must be performed on the RS485 line control unit and on the NV10 device placed at the furthest point connecting the specially provided resistor; termination can be made by means a jumper between the F2-F3 terminals. Termination resistors allow adjusting the impedance of the line, reducing the influence of the induc- RS485 120 Ω SUPERVISION UNIT UAUX A1 ≅ A2 E1 THYBUS D1 ETHERNET RS485 F1 F2 F3 F4 F5 A+ A+ B- B- BLOCK OUT BLOCK IN A15 BLOUT- BLOUT+ A16 BINARY INPUTS A19 A18 A17 IN1 IN2 A20 A21 A22 RS485 F1 F2 F3 F4 F5 A+ B- PRO-N PRO-N USB FRONT PANEL RS485-wiring.ai

tive components of the same, which might compromise good communication. Thybus port In order to extend I/O capability, the Pro_N relays can be customized through external auxiliary mod- ules; moreover 4...20 mA converter and temperature measuring modules are provided. The modules do not need external auxiliary supply. It is fed directly by Thybus port. The Thybus link must be carried out by means category 5 shielded cable with RJ45 connectors. THYBUS OUTPUT THYBUS INTPUT MRI BINARY INPUTS OUTPUT RELAYS 52 IN1 51 50 IN2 49 48 IN3 47 IN4 IN5 43 42 IN6 41 40 IN7 35 34 33 32 31 30 3 IN8 5 6 7 K1 11 12 13 K2 16 15 14 K3 22 21 20 K4 THYBUS OUTPUT THYBUS INTPUT MID16 BINARY INPUTS 52 IN1 51 50 IN2 49 48 IN3 47 IN4 IN5 43 42 IN6 41 40 IN7 35 34 33 32 31 30 3 IN8 5 IN9 6 7 IN10 8 11 IN11 12 IN12 IN13 13 14 IN14 15 16 IN15 20 21 22 23 24 25 IN16 Pro_N UAUX A1 ≅ A2 E1 THYBUS BLOCK OUT A15 BLOUT- BLOUT+ A16 BINARY INPUTS A19 IN1 IN2 A20 A21 A22 BLOCK IN A17 A18 USB FRONT PANEL 36 35 34 30 33 32 31 29 28 45 44 43 42 41 40 39 38 37 54 53 52 48 51 50 49 46 47 MODULO INGRESSI REMOTI INPUT OUTPUT ON RUN BUS 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 25 22 23 24 27 26 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 25 22 23 24 27 26 MID-16 36 35 34 30 33 32 31 29 28 45 44 43 42 41 40 39 38 37 54 53 52 48 51 50 49 46 47 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 25 22 23 24 27 26 MODULO INGRESSI REMOTI INPUT OUTPUT ON RUN BUS MID-16 36 35 34 30 33 32 31 29 28 45 44 43 42 41 40 39 38 37 54 53 52 48 51 50 49 46 47 MID8 MODULO INGRESSI REMOTI INPUT OUTPUT ON RUN BUS OUTPUT ON BUS RUN 1 2 3 4 5 MODULO 4 RELE’ + 8 INGRESSI DIGITALI 4 RELAYS + 8 BINARY INPUTS MODULE INPUT MRI PT1 MPT1 36 35 34 30 33 32 31 29 28 45 44 43 42 41 40 39 38 37 54 53 52 48 51 50 49 46 47 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 25 22 23 24 27 26 OUTPUT MPT ON BUS RUN MODULO PT100 PT100 MODULE INPUT PT2 MPT2 PT3 MPT3 PT4 MPT4 PT8 MPT8 PT7 MPT7 PT6 MPT6 PT5 MPT5 THYBU I S NPUT HYBU S OUTPUT T MPT 8 T1 PT1 PT8 MPT1 MPT8 PT7 MPT7 PT6 MPT6 PT5 MPT5 PT2 MPT2 PT3 MPT3 PT4 MPT4 T8 7 6 T7 T6 T5 11 T2 12 13 15 T3 16 17 20 T4 21 22 49 48 47 44 43 42 40 39 38 35 34 33

The maximum length of the Pro-N device - module link is: • 2 m for MRI module (max one module) • 20 m for MMOS-4 module (max one MMI module) • 30 m for MID16 and MPT modules • 2 m for MPT module (max one Pt100 module) • 2 m for MCI module (max one current converter module) For upgrading, that may be operated at any time with in service devices too, the following operations must be performed: • Turn OFF power supply • Connect the auxiliary modules to the Thybus port in daisy chain mode following the INPUT-OUTPUT sequence.[1] If two MID16 (binary inputs) are installed, the hardware address must be set to avoid communication collisions on the Thybus; for this purpose the default address must be changed on one module, by means of dip-switch on the top circuit board (front plate must be removed). • Turn on power • Go on to the sw setting (see SETTING section of instruction manual). Note 1 The insertion order is free. One MRI module, two MID16 modules, one MPT module, one MCI module and one MMI module (separate operator panel) can be connect at the same time to the Thybus port (maximum expansion). S1 1 8 OFF ON S1 1 8 OFF ON default address modified address (2nd MID16 module) DIP-MID16.ai MID16 hardware address setting

6.4 LED ALLOCATION Following indicator LEDs are available on the front panel: • LED ON (green): if no diagnostic anomalies are detected, the green LED is turned ON while any fault is highlighted by flashing. • LEDs 1...5 (red) are freely assignable from the user to any protective and/or control functions. • LED START (yellow) committed for start information of any protective functions. • LED TRIP (red) committed for trip information of any protective functions. 6.5 FINAL OPERATIONS Before energizing the electric board, it is advisable to check that: • The auxiliary voltage in the panel falls within the operative range of Pro_N relays. • The relay rated voltage (100 V or 400 V) corresponds to the Pro_N input voltages. • All wirings are correct. • All screws are tightly screwed. Led CB Open CB Close

86 NV10B - Manual - 04 - 2022 7 P R O G R A M M I N G A N D S E T T I N G S 7 P R O G R A M M I N G A N D S E T T I N G S All relay programming and adjustment operations may be performed through MMI (keyboard and display) or using a Personal Computer with the aid of the ThyVisor software. 7.1 SW ThyVisor The ThyVisor sw is a “browser” of data (setting, measure, etc..); it implements an engine that is afford to rebuild the menu set up and the relationships to data concerning all Thytronic protective relays by means of XML files. ThyVisor installation The latest release of ThyVisor can be downloaded free of charge from the www.thytronic.it site (Products - Software).[1] ThyVisor use Please refer to ThyVisor user manual for detailed instructions. The document is available on www.thytronic.it (Product / Sotware / ThyVisor - Download area). Note 1 Starting from the 3.5.9 release it is necessary to download and install not only the application setup but the Template setup also. In case off updating download and install only the new release. WARNING For safety reasons, a change of the following parameters become active only after an hw reset: - Relay nominal frequency (fn) - Ethernet communication parameters (IP host address, IP net mask, Autonegotiation).

87 NV10B - Manual - 04 - 2022 7.2 MMI (Man Machine Interface) On the front panel there are eight buttons which allow the user to perform all the settings, reading and modification operations.[1] The adjustment of the settings and the operation mode of the output relays must be performed while the unit is electrically powered; the alphanumeric display shows the necessary information with reference to the operations performed through the keyboard. One minute after the keyboard is not more in use, the display backlight switches automatically to OFF. All preset values are permanently stored in the nonvolatile memory. The buttons take the following operations: - (Up) move the cursor upwards to the preceding menu options - (Down) move the cursor downwards to the subsequent menu options - (Left) move the cursor upwards to the preceding menu options - (Right) move the cursor downwards to the subsequent menu options - (Enter) access to the selected menu with the option of modifying any given parameter - (Reset) abort the current changes and/or accessing the previous menu - Circuit breaker Open command - Circuit breaker Close command At power-up, the display shows the text: “THYTRONIC PRO-NA10-xxx-x serial number date and time: (01/01/2000 00:00” The ON green Led points out the auxiliary power supply voltage (permanent lighted) and possible faults (blink lighted). The display backlight is automatically activated when any key switch is set. By means of the Up or Down buttons, it is possible to cyclically browse through the menu options: READ, SET, COMMUNICATION, TEST Having identified the sub-menu of interest, it is possible to gain access by using the Right button and then analogously, run through the relevant options by using the Up or Down buttons. The full menu tree and some examples are showed in the following pages (numerical values and settings are pointed out as examples and does not agree with real situations. Reading variables (READ) All data (measure, settings, parameters, etc...) may be displayed: “SERIAL NUMBER >>” “INFO >>” “MEASURES >>” “ACTIVE PROFILE >>” “PROTECTIONS >>” “PLC >>” “CIRCUIT BREAKER SUPERVISION >>” “DELAYED INPUTS >>” “INTERNAL STATES >>” “RELAYS >>” “PARTIAL COUNTERS >>” “TOTAL COUNTERS >>” “SELF-TEST >>” “PILOT WIRE DIAGNOSTIC >>” “SELECTIVE BLOCK BLOCK2 >>” “FAULT RECORDING >>” “EVENTS RECORDING >>” Setting modifying (SET) Note 1 Setting changes are enabled when the La mEnabling setting by MMI parameter is set Led CB Open CB Close

88 NV10B - Manual - 04 - 2022 All changes in the setting parameters are carried out through MMI only if the Enable setting by MMI parameter is ON. (ENABLE SETTING BY MMI submenu inside the SET menu). To effect a change, having identified the parameter intended for change, the following procedure must be performed: • Select the parameter going through the menus by means the Up, Down and Right keys. • Press the Enter button for a few seconds; the modification in progress status is highlighted by flashing of the START and TRIP LEDs and by appearance of the pointer on the bottom. • Move the cursor over the parameter intended for change using the Enter button, • Change the parameter by means the Up (increment) or Down (decrement) buttons, • Press the Enter button to move the cursor over the last parameter in the display, • Press the Enter button once again; the cursor and the LED TRIP turn off (the LED START keeps flashing), • Press the Enter button for a few seconds; new message appears: “Confirm settings?” • Answer to the message ENTER: YES to confirm changes or RESET: NO to abort. The end of the START LED blinking points out the end of procedure; the changes become right now active. The abort command may be used to abandon changes (prior to use of the ENTER: YES); the same effect is achieved by removing the auxiliary power supply to the relay. As example, to set the operating mode of the K1 output relay as ENERGIZED, LATCHED, the following procedure must be issued: • By means Down button select the Set menu “SET >>”, • Press the Right button to enter; the following submenu title i displayed: “BASE >>” • Scroll menus by means Down button “INPUTS >>” “RELAYS >>” “LEDS >>” “SELF-TEST RELAY >>” “MMI >>” “PROFILE SELECTION >>” “PROFILE A >>” “PROFILE B >>” “PLC >>” “CIRCUIT BREAKER SUPERVISION 52 >>” “CT SUPERVISION 74CT >>” “REMOTE TRIPPING >>” “PILOT WIRE DIAGNOSTIC >>” “DEMAND MEASURES >>” • Select the Set menu “RELAYS >>”, the “K1 relay Setpoints >>” message is displayed, • Press the Right button to enter; the following messages are displayed: “Logic DE-ENERGIZED Mode NO LATCHED” • Press the Enter button for a few seconds; the modification in progress status is highlighted by the both START and TRIP flashing. • Move the cursor over the parameter intended for change using the Enter button, (in our case on the message “Logic DE-ENERGIZED”, • Change the parameters by means the Up (increment) or Down (decrement) buttons, “Logic EN- ERGIZED”, • Press the Enter button to move the cursor over the last parameter in the display, “Mode NO LATCHED”, • Change the parameters by means the Up (increment) or Down (decrement) buttons, “Mode LATCHED”, • Press the Enter button once again; the cursor and the LED TRIP turn off (the LED START keeps flashing), • Press the Enter button for a few seconds; new message appears: “Confirm settings?” • Answer to the message ENTER: YES to confirm changes or RESET: NO to abort. The end of the LED blinking points out the end of procedure.

89 NV10B - Manual - 04 - 2022 TEST The operational tests with command of the selected output relays may be activated. By means of Up or Down buttons it is possible to browse the main menu till the “TEST” message; to enter you must press the Right button.[1] The display message “Test state: OFF” shows the test state (OFF or test in progress). • Test K2 • Test K3 • Test K4 • Test K5 • Test K6 As example, to start the test of K1, the following procedure must be issued: • Select the Start test menu “Start test >>”. • Press the Right button to start; the test in progress status is highlighted by activation of all LEDs, • Come back by pressing the Left button and select the relay to be tested by means the Up or Down buttons until the message “Test K1 >>” is displayed. • Press the Right button to start the test. • To terminate the test, it is necessary to select the “Stop test >>” message and press the Right button to end the test. In any case the test will be automatically terminated after a delay of one minute. COMMUNICATION Inside the COMMUNICATION menu it is possible to read/modify the setting data of the RS485 Proto- col and Ethernet parameters. By means of Up or Down buttons it is possible to browse the main menu till the “RS485 Protocol >>” or “Ethernet parameters >>” message; to enter you must press the Right button. As example, to select the address 12 for the ModBus protocol, the following procedure must be issued: • Select the Communication menu “COMMUNICATION >>”. • By means Down button select the “RS485 Protocol >>”. • Press the Right button to enter; the following message is displayed: “Protocol MODBUS” “Address 1” “9600 baud” • Start the procedure to effect a change explained in the Setting modifying (SET) paragraph: • Press the Enter button for a few seconds; the modification in progress status is highlighted by the both START and TRIP flashing. • Move the cursor over the parameter intended for change using the Enter button, (in the example on the 1 address), • Change the parameters by means the Up (increment) button (up to 12 address), • Press the Enter button to move the cursor over the last parameter in the display, • Press the Enter button once again; the cursor and the LED TRIP turn off (the LED START keeps flashing), • Press the Enter button for a few seconds; new message appears: “Confirm settings?” • Answer to the message ENTER: YES to confirm changes or RESET: NO to abort. The end of the LED blinking points out the end of procedure. Note 1 Instantly all the relays are switched in rest state, including relays programmed as “normally energized”

90 NV10B - Manual - 04 - 2022 Circuit breaker commands By means of the Open command and Close command keys, the circuit breaker commands may be issued. The committed output relays must be enabled inside the Circuit Breaker supervision \ LEDs-relays allocation menu. Enable / block changes via keyboard - Password All parameters (measurements and settings) are available for reading from the operator panel (MMI), while the setting changes are enabled or disabled depending on possible operation modes: • Enable without password (factory setting) • Enable with password • Disabled The choice of operation modes is possible only through ThyVisor operating at the session level 1: • Connect the PC serial port to the relay socket on the RJ10 front panel • Run the ThyVisor sw (the latest version latest version available on the site is recommended). • Select the Preference - Session menu; when you start the session level is set to 0 as shown in the bottom of the window • Select the level 1. Prompted for a password (the default level1) to move to level 1. Confirm twice with “OK”. (Level 1, as shown in the bottom of the window). • Open the communication session by executing the menu command Communication - Open. Verify that inside the modality box Serial and Automatic are selected • ThyVisor will search automatically the relay from the template, regardless of what is selected in the device family. • Inside the Serial Configuration panel select the COM port (eg COM1, COM4 etc), give the Start command and wait for the opening of the new window • Save the file. Choose the location to save the file and give the Save command. The configuration data of the relay are transferred to the PC (the progress bar is displayed from 0 ... 100%). A folder on a yellow background with the name of the file is highlighted on the left side of the windows. The serial connection is operative, at the bottom of the screen the word ON-LINE is highlighted in green field. • Select the Set \ MMI folder (MMI stands for Man-Machine-Interface = keyboard). On the right side of the window (first row) select Parameter setting enable; with a “click” on the column value 3 options are available: - OFF = keyboard enabled only for reading - By password = keyboard enabled for reading and setting by means of password - ON = keyboard enabled for reading and setting without password To modify any parameter the calibration session must be open by means of Start setting command from the menu or directly by clicking on F4 key. the opening of the session setting is highlighted by its Programming state:Open on yellow field on the bottom bar. To save the monifiche it is necessary to send the command from the menu “IED / close” or directly by clicking on F5 key. Operation with Password If the By password mode is selected a new menu password is inserted at the top of the display menu. • Press the Right key the: password not ok >> message is displayed and any changes of parameters is disabled • Press the Right key; you can enter the password page enter password where you are prompted to enter the 4 characters password (the default password is 0000) • Press the Enter button for a few seconds; the modification in progress status is highlighted by flashing of the START and TRIP LEDs and by appearance of the pointer on the bottom • Change the parameters by means the Up (increment) or Down (decrement) buttons, using the Left and Right keys to move to the previous or next character

91 NV10B - Manual - 04 - 2022 • Press the Enter button; the cursor and the LED TRIP turn off (the LED START keeps flashing), • Press the Enter button for a few seconds; new message appears: Confirm settings? • Answer to the message ENTER: YES to confirm changes or RESET: NO to abort. • The message: password ok >> is displayed • To exit from password menu use Left or Up keys: if you press the Right button you go back in the password menu and the password must be entered. The parameter changes are enabled from the keyboard. After any confirming with (Enter) or abandoning the change (reset button) the password must be entered again. • The possibility of modifying the parameters from the keyboard is automatically disabled after about 3 minutes elapsed without pressing any button. If you do not want to wait three minutes of waiting, it must go back to the password menu and come out without input any data ( Left and Right until the the message password not ok >> is displayed. Changing the password Changing the password is possible only after entering the correct password (password ok >> message); press the Down key, a new menu is displayed change password that you access with the Right key. Inside this menu the password can be changed. • Press the Enter button for a few seconds; the modification in progress status is highlighted by flashing of the START and TRIP LEDs and by appearance of the pointer on the bottom • Change the parameters by means the Up (increment) or Down (decrement) buttons, using the Left and Right keys to move to the previous or next character • Press the Enter button; the cursor and the LED TRIP turn off (the LED START keeps flashing), • Press the Enter button for a few seconds; new message appears: Confirm settings? • Answer to the message ENTER: YES to confirm changes or RESET: NO to abort. Lost password If password is lost the data base of the device must be restored, proceed with the following steps: • Activate the session level 1 • Send Set default settings command available inside the Command \ Default settings menu. Following the Set default settings command the password is reset to 0000. 7.3 MODULES MANAGEMENT After installation, the modules must be enabled (working with level 1 session level). The Thybus modules may be set inside the Procedure menu (or by means a click on the icon). Following up any module configuration an automatic reset is issued and the I/O devices are included inside the device menu. [1] When two MID16 modules are enabled, the hardware address must be set; the dip-switch layout is showed inside the INSTALLATION section. Note 1 Binary inputs and output names (ThyVisor): Binary inputs for devices with two inputs onboard IN1, IN2 on board IN3...IN10 with MRI module IN11...IN26 with one MID16 module IN27...IN42 with two MID16 modules Binary inputs for devices with five inputs onboard IN1...IN5 on board IN6...IN13 with MRI module IN14...IN29 with one MID16 module IN30...IN45 with two MID16 modules Output relays K1...K6 on board K7...K10 with MRI module LEDs: ON, START, TRIP, L1...L5 on board L6...L10 with MRI module WARNING The command Set default settings restores the factory settings, all user- defined adjustments are cleared. Be carefully to enter the correct parameter ! The device serial number should be set to avoid IP address conflicts for devices connected to the Ethernet network.

92 NV10B - Manual - 04 - 2022 7.4 MAINTENANCE The Pro-N relays do not require any particular maintenance; all circuits use high quality static com- ponents, the subassembly products undergo dynamic checks on their functioning before the final assembling of the complete equipment. The dedicated circuits and the firmware for the self-test function continuously check the relay operation; the continuously operating auto-zeroing function dynamically corrects the measuring errors due to offset, heat dependent drifts, aging of compo- nents, etc. The processor is equipped with a watch-dog circuit which restores the correct operation of the firmware in case of fault. If the following criteria are properly implemented: • comprehensive functional tests at commissioning, • absence of significant modification on the protection system, • activation and permanent remote control of self-test alarms through supervision, • control of self-test undetectable failures (comparing of measures with the external instruments, auxiliary voltage control, etc ..) • analysis of the stored information (faults and events, and oscillographic records), periodic checks can be avoided. In the absence of some of the criteria listed above, it is advisable to perform periodic checks every five years. 7.5 REPAIR No repair of possible faults by the client is foreseen; if following to any irregularity of operation, the above tests confirm the presence of a fault, it will be necessary to send the relay to the factory for the repair and the consequent settings and checks. 7.6 PACKAGING The Pro-N devices must be stored within the required temperature limits; the relative humidity should not cause condensation or formation of frost. It is recommended that the devices are stored in their packaging; in the case of long storage, espe- cially in extreme climatic conditions, it is recommended that the device is supplied with power for some hours before the commissioning, in order to bring the circuits to the rating conditions and to stabilize the operation of the components.

8 A P P E N D I X 8 A P P E N D I X 8.1 APPENDIX A1 - I/O Diagram NV10P-I-O.ai UL1 UL2 UL3 B5 B6 B3 B4 B1 B2 NV10 UAUX A1 ≅ A2 OUTPUT RELAYS A9 A10 A11 A12 A13 A14 A3 A4 A5 A6 A7 A8 K2 K3 K4 K5 K6 K1 BINARY INPUTS A19 IN1 IN2 A20 A21 A22 USB FRONT PANEL D1 ETHERNET RS485 F1 F2 F3 F4 F5 A+ B- THYBUS E1 A17 A18 A15 A16 UE B7 B8 VOLTAGE INPUTS

8.2 APPENDIX A2 - Interfaces Interfaces.ai USB FRONT PANEL D1 ETHERNET HUB N.8 Pt100 E1 N.16 binary inputs N.8 binary inputs + 4 output relay RS485 F1 F2 F3 F4 F5 A+ B- Supervision unit 36 35 34 30 33 32 31 29 28 45 44 43 42 41 40 39 38 37 54 53 52 48 51 50 49 46 47 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 25 22 23 24 27 26 OUTPUT MPT ON BUS RUN MODULO PT100 PT100 MODULE INPUT OUTPUT MID16 ON BUS RUN MODULO INGRESSI REMOTI INPUT 36 35 34 30 33 32 31 29 28 45 44 43 42 41 40 39 38 37 54 53 52 48 51 50 49 46 47 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 25 22 23 24 27 26 36 35 34 30 33 32 31 29 28 45 44 43 42 41 40 39 38 37 54 53 52 48 51 50 49 46 47 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 25 22 23 24 27 26 MID8 MODULO INGRESSI REMOTI INPUT OUTPUT ON RUN BUS OUTPUT ON BUS RUN 1 2 3 4 5 MODULO 4 RELE’ + 8 INGRESSI DIGITALI 4 RELAYS + 8 BINARY INPUTS MODULE INPUT MRI THYBUS

8.3 APPENDIX A3 - Connection diagrams Note: Some typical connection diagram are shown. All diagram must be considered just as example; they cannot be comprehensive for real applications. For all diagrams the output contacts are shown in de-energized state for standard reference. Voltage inputs - phase-to-earth VTs star connections (*) ANTIFERRORESONANCE NV10P-sch2.ai NV10B L1 L2 L3 UE UL1 UL2 UL3 VOLTAGE INPUTS R (*) da dn n a N A B7 B8 B5 B6 B3 B4 B1 B2 59N 27 59

(*) ANTIFERRORESONANCE Voltage inputs - delta connections VTs NV10P-sch4.ai n a NV10B L1 L2 L3 UE UL1 UL2 UL3 VOLTAGE INPUTS R (*) da dn N A B7 B8 B5 B6 B3 B4 B1 B2 59N 27 59

Voltage inputs - “V” connections VTs (*) ANTIFERRORESONANCE NV10P-sch7.ai b n n a B A L1 L2 L3 B7 B8 B5 B6 B3 B4 B1 B2 R (*) da dn N N N A NV10B UE UL1 UL2 UL3 VOLTAGE INPUTS 59N 27 59

Voltage inputs - direct connection to a low voltage network with phase to phase measure with or without neutral (UR = 400 V versions) L1 L2 L3 B5 B6 B7 B8 B3 B4 B1 B2 NV10B UE UL1 UL2 UL3 VOLTAGE INPUTS N 27 59

8.4 APPENDIX B - Dimensions 120 F1 D1 RX TX F2 F3 F4 F5 A1 A2 A3 A4 A5 A6 A7 A8 A9 A10 A11 A12 A13 A14 A15 A16 A17 A18 A19 A20 A21 A22 B1 B2 B3 B4 B5 B6 B7 B8 C1 C2 C4 C3 C5 C6 C7 C8 E1 101 171 80 31 F1 D1 RX TX F2 F3 F4 F5 A1 A2 A3 A4 A5 A6 A7 A8 A9 A10 A11 A12 A13 A14 A15 A16 A17 A18 A19 A20 A21 A22 B1 B2 B3 B4 B5 B6 B7 B8 C1 C2 C4 C3 C5 C6 C7 C8 E1 128.5 110 200 168 20 205 149 30 5 30 107 177 ø 4.5 102.5 ±0.3 70 161 154 ø 4.5 ø 4.5 212.5 25 15 170 275 177 (4U) 101.6 482.6 465 RACK MOUNTING FLUSH MOUNTING CUTOUT SIDE VIEWS FRONT VIEWS ON 4 1 3 2 5 TRIP START ON 4 1 3 2 5 TRIP START ON 4 1 3 2 5 TRIP START ON 4 1 3 2 5 TRIP START ON 4 1 3 2 5 TRIP START ON 4 1 3 2 5 TRIP START REAR VIEWS FLUSH MOUNTING PROJECTING MOUNTING FLUSH MOUNTING PROJECTING MOUNTING (Separate operator panel) FLUSH MOUNTING SEPARATE OPERATOR PANEL PROJECTING MOUNTING PROJECTING MOUNTING (Stand alone) (Separate operator panel) N.4 holes ø 3.5

8.5 APPENDIX C - Setting table Notes: - The 26 element, the output relay and LEDs K7...K10, L6...L10 and the binary input IN3...IN42 settings are available only when the concerning I/O circuits are implemented (MPT, MRI and MID16 modules on Thybus) Description Parameter Unit Setting range Set Base Relay reference name Relay nominal frequency - fn Hz 50 ... 60 step = 10 Relay nominal voltage - Un V 50 ... 130 step = 1 200 ... 520 step = 1 Relay residual nominal voltage ( direct measurement ) - UEn V 50 ... 130 step = 1 Relay residual nominal voltage ( calculated measurement ) - UECN = 1.73 * Un Line VT primary nominal voltage - Unp V 50 ... 499 step = 1 500 ... 4990 step = 10 5000 ... 49900 step = 100 50000 ... 500000 step = 1000 Residual primary nominal voltage ( phase to phase ) * 1.73 - UEnp V 50 ... 499 step = 1 500 ... 4990 step = 10 5000 ... 49900 step = 100 50000 ... 500000 step = 1000 Measurements reading mode RELATIVE | PRIMARY Language English | Turkish | Russian Inputs Binary input IN1 IN1 Logic Active-ON | Active-OFF IN1 tON Value s 0.00 ... 9.99 step = 0.01 10.0 ... 100.0 step = 0.1 IN1 tOFF Value s 0.00 ... 9.99 step = 0.01 10.0 ... 100.0 step = 0.1 IN1 matching Reset LEDs | Set profile | Fault trigger | Block1 | TCS1 | TCS2 | Trip ProtExt | Reset counters | Reset CB Monitor | 52a | 52b | Open CB | Close CB | Remote trip | 74VT ext. | None Binary input IN2 IN2 Logic Active-ON | Active-OFF IN2 tON Value s 0.00 ... 9.99 step = 0.01 10.0 ... 100.0 step = 0.1 IN2 tOFF Value s 0.00 ... 9.99 step = 0.01 10.0 ... 100.0 step = 0.1 IN2 matching Reset LEDs | Set profile | Fault trigger | Block1 | TCS1 | TCS2 | Trip ProtExt | Reset counters | Reset CB Monitor | 52a | 52b | Open CB | Close CB | Remote trip | 74VT ext. | None Binary input IN3 Relays K1 Logic De-energized | Energized Operation MODE No-latched | Pulse | Latched Minimum pulse width ms 0 ... 500 step = 5 K2 Logic De-energized | Energized Operation MODE No-latched | Pulse | Latched Minimum pulse width ms 0 ... 500 step = 5 K3