ABB relion REF615 Applications Manual

Issued: 04.03.2009 Revision: D Product version: 2.0 © Copyright 2009 ABB. All rights reserved

permission from ABB, and the contents thereof must not be imparted to a third party, nor used for any unauthorized purpose. The software or hardware described in this document is furnished under a license and may be used, copied, or disclosed only in accordance with the terms of such license. Trademarks ABB is a registered trademark of ABB Group. All other brand or product names mentioned in this document may be trademarks or registered trademarks of their respective holders. Guarantee Please inquire about the terms of guarantee from your nearest ABB representative. ABB Oy Distribution Automation P.O. Box 699 FI-65101 Vaasa, Finland Telephone: +358 10 2211 Facsimile: +358 10 22 41094 http://www.abb.com/substationautomation

or product description and are not to be deemed as a statement of guaranteed properties. All persons responsible for applying the equipment addressed in this manual must satisfy themselves that each intended application is suitable and acceptable, including that any applicable safety or other operational requirements are complied with. In particular, any risks in applications where a system failure and/or product failure would create a risk for harm to property or persons (including but not limited to personal injuries or death) shall be the sole responsibility of the person or entity applying the equipment, and those so responsible are hereby requested to ensure that all measures are taken to exclude or mitigate such risks. This document has been carefully checked by ABB but deviations cannot be completely ruled out. In case any errors are detected, the reader is kindly requested to notify the manufacturer. Other than under explicit contractual commitments, in no event shall ABB be responsible or liable for any loss or damage resulting from the use of this manual or the application of the equipment.

on the approximation of the laws of the Member States relating to electromagnetic compatibility (EMC Council Directive 2004/108/EC) and concerning electrical equipment for use within specified voltage limits (Low-voltage directive 2006/95/ EC). This conformity is the result of a test conducted by ABB in accordance with Article 10 of the directive in agreement with the product standards EN 50263 and EN 60255-26 for the EMC directive, and with the product standards EN 60255-6 and EN 60255-27 for the low voltage directive. The IED is designed in accordance with the international standards of the IEC 60255 series.

Section 1 Introduction.......................................................................7 This manual........................................................................................7 Intended audience..............................................................................7 Product documentation.......................................................................8 Product documentation set............................................................8 Document revision history.............................................................9 Related documentation................................................................10 Document symbols and conventions................................................10 Safety indication symbols............................................................10 Document conventions................................................................11 Functions, codes and symbols....................................................11 Section 2 REF615 overview...........................................................15 Overview...........................................................................................15 Product version history................................................................16 PCM600 and IED connectivity package version..........................16 Operation functionality......................................................................16 Standard configurations...............................................................16 Optional functions........................................................................18 Physical hardware............................................................................19 LHMI.................................................................................................21 LCD.............................................................................................21 LEDs............................................................................................22 Keypad........................................................................................22 WHMI................................................................................................23 Authorization.....................................................................................24 Communication.................................................................................25 Section 3 REF615 variants.............................................................27 REF615 variant list...........................................................................27 Presentation of standard configurations...........................................27 Standard configurations...............................................................28 Connection diagrams...................................................................31 Standard configuration A including directional earth-fault protection..........................................................................................34 Applications.................................................................................34 Functions.....................................................................................35 Default I/O connections..........................................................36 Functional diagrams....................................................................36 Functional diagrams for protection.........................................37 Table of contents REF615 1 Application Manual

circuit supervision...................................................................42 Functional diagrams for control and interlocking....................43 Standard configuration B including directional earth-fault protection and CB condition monitoring............................................45 Applications.................................................................................45 Functions.....................................................................................45 Default I/O connections..........................................................46 Functional diagrams....................................................................47 Functional diagrams for protection.........................................47 Functional diagram for disturbance recorder and trip circuit supervision...................................................................53 Functional diagrams for control and interlocking....................54 Standard configuration C including non-directional earth-fault protection..........................................................................................58 Applications.................................................................................58 Functions.....................................................................................58 Default I/O connections..........................................................59 Functional diagrams....................................................................60 Functional diagrams for protection.........................................60 Functional diagram for disturbance recorder and trip circuit supervision...................................................................65 Functional diagrams for control and interlocking....................66 Standard configuration D including non-directional earth-fault protection and CB condition monitoring............................................68 Applications.................................................................................68 Functions.....................................................................................68 Default I/O connections..........................................................69 Functional diagrams....................................................................70 Functional diagrams for protection.........................................70 Functional diagram for disturbance recorder and trip circuit supervision...................................................................75 Functional diagrams for control and interlocking....................76 Standard configuration E including directional earth-fault protection with phase-voltage measurement....................................80 Applications.................................................................................80 Functions.....................................................................................80 Default I/O connections..........................................................81 Functional diagrams....................................................................82 Functional diagrams for protection.........................................82 Functional diagram for disturbance recorder and trip circuit supervision...................................................................88 Functional diagrams for control and interlocking....................89 Standard configuration F including directional overcurrent protection with voltage protection.....................................................93 Table of contents 2 REF615 Application Manual

Functional diagrams....................................................................96 Functional diagrams for protection.........................................96 Functional diagram for disturbance recorder and trip circuit supervision.................................................................102 Functional diagrams for control and interlocking..................104 Section 4 Basic functions.............................................................111 General parameters........................................................................111 Self-supervision..............................................................................126 Internal faults.............................................................................127 Warnings...................................................................................128 Time synchronization......................................................................129 Parameter setting groups...............................................................130 Section 5 Protection functions......................................................133 Three-phase current protection......................................................133 Three-phase non-directional overcurrent protection PHxPTOC..................................................................................133 Identification.........................................................................133 Functionality.........................................................................133 Application............................................................................133 Three-phase directional overcurrent protection DPHxPDOC...............................................................................140 Identification.........................................................................140 Functionality.........................................................................140 Application............................................................................140 Three-phase thermal overload protection for overhead lines and cables T1PTTR...................................................................143 Identification.........................................................................143 Functionality.........................................................................143 Application............................................................................144 Earth-fault protection......................................................................145 Non-directional earth-fault protection EFxPTOC.......................145 Identification.........................................................................145 Functionality.........................................................................145 Application............................................................................145 Directional earth-fault protection DEFxPDEF............................146 Identification.........................................................................146 Functionality.........................................................................146 Directional earth-fault principles...........................................146 Application............................................................................152 Table of contents REF615 3 Application Manual

Identification.........................................................................154 Functionality.........................................................................155 Application............................................................................155 Unbalance protection......................................................................158 Negative phase-sequence current protection NSPTOC............158 Identification.........................................................................158 Functionality.........................................................................159 Application............................................................................159 Phase discontinuity PDNSPTOC...............................................159 Identification.........................................................................159 Functionality.........................................................................160 Application............................................................................160 Arc protection ARCSARC...............................................................162 Identification..............................................................................162 Functionality..............................................................................162 Application.................................................................................162 Voltage protection...........................................................................166 Overvoltage protection PHPTOV...............................................166 Identification.........................................................................166 Functionality.........................................................................167 Application............................................................................167 Undervoltage protection PHPTUV.............................................167 Identification.........................................................................167 Functionality.........................................................................168 Application............................................................................168 Residual overvoltage protection ROVPTOV..............................169 Identification.........................................................................169 Functionality.........................................................................169 Application............................................................................169 Negative sequence overvoltage protection NSPTOV................170 Identification.........................................................................170 Functionality.........................................................................170 Application............................................................................170 Positive sequence undervoltage protection PSPTUV...............171 Identification.........................................................................171 Functionality.........................................................................171 Application............................................................................171 Section 6 Protection related functions..........................................181 Three-phase inrush detector INRPHAR.........................................181 Identification..............................................................................181 Functionality..............................................................................181 Application.................................................................................181 Table of contents 4 REF615 Application Manual

Identification..............................................................................182 Functionality..............................................................................182 Application.................................................................................183 Protection trip conditioning TRPPTRC...........................................184 Identification..............................................................................184 Functionality..............................................................................184 Application.................................................................................185 Section 7 Supervision functions...................................................187 Trip circuit supervision TCSSCBR..................................................187 Identification..............................................................................187 Functionality..............................................................................187 Application.................................................................................187 Current circuit supervision CCRDIF...............................................194 Identification..............................................................................194 Functionality..............................................................................194 Application.................................................................................195 Fuse failure supervision SEQRFUF...............................................199 Identification..............................................................................199 Functionality..............................................................................199 Application.................................................................................200 Section 8 Condition monitoring functions.....................................201 Circuit breaker condition monitoring SSCBR..................................201 Identification..............................................................................201 Functionality..............................................................................201 Application.................................................................................201 Section 9 Measurement functions................................................205 Basic measurements......................................................................205 Three-phase current CMMXU...................................................205 Identification.........................................................................205 Three-phase voltage VMMXU...................................................205 Identification.........................................................................205 Neutral current RESCMMXU.....................................................205 Identification.........................................................................205 Residual voltage RESVMMXU..................................................205 Identification.........................................................................205 Sequence current CSMSQI.......................................................206 Identification.........................................................................206 Phase sequence voltage VSMSQI............................................206 Identification.........................................................................206 Three-phase power and energy PEMMXU................................206 Table of contents REF615 5 Application Manual

Disturbance recorder......................................................................208 Functionality..............................................................................208 Application.................................................................................208 Section 10 Control functions..........................................................211 Circuit breaker control CBXCBR....................................................211 Identification..............................................................................211 Functionality..............................................................................211 Application.................................................................................211 Disconnector DCSXSWI and earthing switch ESSXSWI...............212 Identification..............................................................................212 Functionality..............................................................................212 Application.................................................................................213 Interaction between control modules..............................................213 Auto recloser DARREC..................................................................214 Identification..............................................................................214 Functionality..............................................................................214 Application.................................................................................214 Shot initiation........................................................................215 Sequence.............................................................................217 Configuration examples........................................................218 Delayed initiation lines..........................................................221 Shot initiation from protection start signal............................223 Fast trip in Switch on to fault................................................223 Section 11 Requirements for measurement transformers..............225 Current transformers......................................................................225 Current transformer requirements for non-directional overcurrent protection................................................................225 Current transformer accuracy class and accuracy limit factor....................................................................................225 Non-directional overcurrent protection.................................226 Example for non-directional overcurrent protection..............227 Section 12 Glossary.......................................................................229 Table of contents 6 REF615 Application Manual

per function. The manual can be used to find out when and for what purpose a typical protection function can be used. The manual can also be used when calculating settings. 1.2 Intended audience This manual addresses the protection and control engineer responsible for planning, pre-engineering and engineering. The protection and control engineer must be experienced in electrical power engineering and have knowledge of related technology, such as communication and protocols. 1MRS756378 D Section 1 Introduction REF615 7 Application Manual

Planning & purchase Engineering Installing Commissioning Operation Maintenance Decommissioning deinstalling & disposal Application manual Operation manual Installation manual Service manual Engineering manual Commissioning manual Communication protocol manual Technical manual Planning & purchase Engineering Installing Commissioning Operation Maintenance Decommissioning deinstalling & disposal Planning & purchase Engineering Installing Commissioning Operation Maintenance Decommissioning deinstalling & disposal Application manual Application manual Operation manual Operation manual Installation manual Installation manual Service manual Service manual Engineering manual Engineering manual Commissioning manual Commissioning manual Communication protocol manual Communication protocol manual Technical manual Technical manual en07000220.vsd IEC07000220 V1 EN Engineering Manual contains instructions on how to engineer the IEDs. The manual provides instructions on how to use the different tools for IED engineering. It also includes instructions on how to handle the tool component available to read disturbance files from the IEDs on the basis of the IEC 61850 definitions. It further introduces the diagnostic tool components available for IEDs and the PCM600 tool. Installation Manual contains instructions on how to install the IED. The manual provides procedures for mechanical and electrical installation. The chapters are organized in chronological order in which the IED should be installed. Commissioning Manual contains instructions on how to commission the IED. The manual can also be used as a reference during periodic testing. The manual provides procedures for energizing and checking of external circuitry, setting and configuration as well as verifying settings and performing directional tests. The chapters are organized in chronological order in which the IED should be commissioned. Section 1 1MRS756378 D Introduction 8 REF615 Application Manual

service once it has been commissioned. The manual can be used to find out how to handle disturbances or how to view calculated and measured network data to determine the cause of a fault. Service Manual contains instructions on how to service and maintain the IED. The manual also provides procedures for de-energizing, de-commissioning and disposal of the IED. Application Manual contains application descriptions and setting guidelines sorted per function. The manual can be used to find out when and for what purpose a typical protection function can be used. The manual can also be used when calculating settings. Technical Manual contains application and functionality descriptions and lists function blocks, logic diagrams, input and output signals, setting parameters and technical data sorted per function. The manual can be used as a technical reference during the engineering phase, installation and commissioning phase, and during normal service. Communication Protocol Manual describes a communication protocol supported by the IED. The manual concentrates on vendor-specific implementations. Point List Manual describes the outlook and properties of the data points specific to the IED. The manual should be used in conjunction with the corresponding Communication Protocol Manual. All manuals are not available yet. 1.3.2 Document revision history Document revision/date Product version History A/20.12.2007 1.0 First release B/08.02.2008 1.0 Content updated C/02.07.2008 1.1 Content updated to correspond to the product version D/04.03.2009 2.0 Content updated to correspond to the product version Download the latest revision of the document from the ABB web site http://www.abb.com/substationautomation. 1MRS756378 D Section 1 Introduction REF615 9 Application Manual

Document ID Modbus Communication Protocol Manual 1MRS756468 DNP 3.0 Communication Protocol Manual 1MRS756709 IEC 60870-5-103 Communication Protocol Manual 1MRS756710 Installation Manual 1MRS756375 Operation Manual 1MRS756708 Technical Manual 1MRS756377 1.4 Document symbols and conventions 1.4.1 Safety indication symbols This publication includes icons that point out safety-related conditions or other important information. The electrical warning icon indicates the presence of a hazard which could result in electrical shock. The warning icon indicates the presence of a hazard which could result in personal injury. The caution icon indicates important information or warning related to the concept discussed in the text. It might indicate the presence of a hazard which could result in corruption of software or damage to equipment or property. The information icon alerts the reader to relevant facts and conditions. The tip icon indicates advice on, for example, how to design your project or how to use a certain function. Although warning hazards are related to personal injury, it should be understood that operation of damaged equipment could, under certain operational conditions, result Section 1 1MRS756378 D Introduction 10 REF615 Application Manual

comply fully with all warning and caution notices. 1.4.2 Document conventions • Abbreviations and acronyms in this manual are spelled out in Glossary. Glossary also contains definitions of important terms. • Push button navigation in the LHMI menu structure is presented by using the push button icons, for example: To navigate between the options, use and . • HMI menu paths are presented in bold, for example: Select Main menu/Configuration/HMI. • Menu names are shown in bold in WHMI, for example: Click Information in the WHMI menu structure. • LHMI messages are shown in Courier font, for example: To save the changes in non-volatile memory, select Yes and press . • Parameter names are shown in italics, for example: The function can be enabled and disabled with the Operation setting. • Parameter values are indicated with quotation marks, for example: The corresponding parameter values are "On" and "Off". • IED input/output messages and monitored data names are shown in Courier font, for example: When the function starts, the START output is set to TRUE. 1.4.3 Functions, codes and symbols All available functions are listed in the table. All of these may not be applicable to all products. Table 1: Functions included in standard configurations Function IEC 61850 IEC 60617 IEC-ANSI Three-phase non-directional overcurrent protection PHLPTOC1 3I> 51P-1 PHHPTOC1 3I>> (1) 51P-2 (1) PHHPTOC2 3I>> (2) 51P-2 (2) PHIPTOC1 3I>>> 50P/51P Three-phase directional overcurrent, low stage DPHLPDOC1 3I> → (1) 67-1 (1) DPHLPDOC2 3I> → (2) 67-1 (2) Three-phase directional overcurrent, high stage DPHHPDOC1 3I>> → 67-2 Arc protection ARCSARC1 ARC (1) 50L/50NL (1) ARCSARC2 ARC (2) 50L/50NL (2) ARCSARC3 ARC (3) 50L/50NL (3) Table continues on next page 1MRS756378 D Section 1 Introduction REF615 11 Application Manual

EFLPTOC1 I0> (1) 51N-1 (1) EFLPTOC2 I0> (2) 51N-1 (2) EFHPTOC1 I0>> 51N-2 EFIPTOC1 I0>>> 50N/51N Directional earth-fault protection DEFLPDEF1 I0> → (1) 67N-1 (1) DEFLPDEF2 I0> → (2) 67N-1 (2) DEFHPDEF1 I0>> → 67N-2 Transient/Intermittent earth-fault protection INTRPTEF1 I0> → IEF 67NIEF Non-directional (cross-country) earth fault, using calculated I0 EFHPTOC1 I0>> 51N-2 Negative-sequence overcurrent protection NSPTOC1 I2> (1) 46 (1) NSPTOC2 I2> (2) 46 (2) Phase discontinuity PDNSPTOC1 I2/I1> 46PD Residual overvoltage protection ROVPTOV1 U0> (1) 59G (1) ROVPTOV2 U0> (2) 59G (2) ROVPTOV3 U0> (3) 59G (3) Three-phase undervoltage protection PHPTUV1 3U< (1) 27 (1) PHPTUV2 3U< (2) 27 (2) PHPTUV3 3U< (3) 27 (3) Three-phase overvoltage protection PHPTOV1 3U> (1) 59 (1) PHPTOV2 3U> (2) 59 (2) PHPTOV3 3U> (3) 59 (3) Positive-sequence undervoltage PSPTUV1 U1< 47U+ Negative-sequence overvoltage NSPTOV1 U2> 47O- Three-phase inrush detector INRPHAR1 3I2f> 68 Three-phase thermal protection for feeders, cables and distribution transformers T1PTTR1 3Ith>F 49F Autoreclosure DARREC1 O → I 79 Circuit breaker failure protection CCBRBRF1 3I>/I0>BF 51BF/51NBF Master Trip TRPPTRC1 Master Trip (1) 94/86 (1) TRPPTRC2 Master Trip (2) 94/86 (2) Trip circuit supervision TCSSCBR1 TCS (1) TCM (1) TCSSCBR2 TCS (2) TCM (2) Fuse failure supervision SEQRFUF1 FUSEF 60 Disturbance recorder RDRE1 - - Circuit breaker condition monitoring SSCBR1 CBCM CBCM Three-phase current measurement CMMXU1 3I 3I Sequence current measurement CSMSQI1 I1, I2, I0 I1, I2, I0 Table continues on next page Section 1 1MRS756378 D Introduction 12 REF615 Application Manual

RESCMMXU1 I0 In Residual voltage measurement RESVMMXU1 U0 Vn Three-phase voltage measurement VMMXU1 3U 3U Sequence voltage measurement VSMSQI1 U1, U2, U0 U1, U2, U0 Three-phase power and energy measurement PEMMXU1 P, E P, E 1MRS756378 D Section 1 Introduction REF615 13 Application Manual

overcurrent and earth-fault protection. It is applicable to all types of radial isolated neutral networks, resistant earthed networks and compensated networks. REF615 is part of a product family that will cover many protection applications for utility and industry customers. The IED features draw-out-type design, compact size and ease of use. Depending on the IED variant, the protection functions may include: • Three-phase non-directional overcurrent protection, 4 stages • Three-phase directional overcurrent, 3 stages • Directional earth-fault protection, 3 stages • Non-directional (cross-country) earth fault, using calculated I0 • Non-directional earth fault, 3 stages • Transient/intermittent earth-fault protection • Non-directional sensitive earth fault • Negative-sequence overcurrent protection, 2 stages • Phase discontinuity • Three-phase overvoltage protection, 3 stages • Positive-sequence undervoltage protection • Negative-sequence overvoltage protection • Residual overvoltage protection, 3 stages • Three-phase undervoltage protection, 3 stages • Three-phase transformer inrush detector • Three-phase thermal overload, lines and cables • Circuit-breaker failure protection • Electrically latched lockout relay Depending on the IED variant, the optional functions may include: • Auto-reclose • Arc protection, three lens sensors for arc detection 1MRS756378 D Section 2 REF615 overview REF615 15 Application Manual

IED version Release date Product history 1.0 20.12.2007 Product released 1.1 02.07.2008 • IRIG-B • Support for parallel protocols added: IEC 61850 and Modbus • X130 BIO added: optional for variants B and D • CB interlocking functionality enhanced • TCS functionality in HW enhanced • Non-volatile memory added 2.0 04.03.2009 • Support for DNP 3.0 serial or TCP/IP • Support for IEC 60870-5-103 • Voltage measurement and protection • Power and energy measurement • New standard configurations E and F • Disturbance recorder upload via WHMI • Fuse failure supervision 2.1.2 PCM600 and IED connectivity package version Supported tools: • Protection and Control IED Manager PCM600 Ver. 2.0 SP2 or later • REF615 Connectivity Package Ver. 2.0 • Parameter Setting Tool • Disturbance Handling Tool • Signal Monitoring Tool • Signal Matrix Tool • Communication Management Tool • Firmware Update Tool • IED Configuration Migration Tool (ICM) • Lifecycle Traceability Tool Download connectivity packages from the ABB web site http:// www.abb.com/substationautomation 2.2 Operation functionality 2.2.1 Standard configurations The IED is available with six alternative standard configurations. The table indicates the functions supported by the different IED configurations. Section 2 1MRS756378 D REF615 overview 16 REF615 Application Manual

A and B Non-directional overcurrent and non-directional earth-fault protection C and D Non-directional overcurrent and directional earth-fault protection with phase-voltage based measurements E Directional overcurrent and earth-fault protection with phase-voltage based measurements, undervoltage and overvoltage protection F Table 3: Supported functions Functionality A B C D E F Protection Three-phase non-directional overcurrent, low-set stage ● ● ● ● ● - Three-phase non-directional overcurrent, high-set stage, instance 1 ● ● ● ● ● - Three-phase non-directional overcurrent, high-set stage, instance 2 ● ● ● ● ● - Three-phase non-directional overcurrent, instantaneous stage ● ● ● ● ● ● Three-phase directional overcurrent, low-set stage, instance 1 - - - - - ● Three-phase directional overcurrent, low-set stage, instance 2 - - - - - ● Three-phase directional overcurrent, high-set stage - - - - - ● Directional earth-fault, low-set stage, instance 1 ● ● - - ● ● Directional earth-fault, low-set stage, instance 2 ● ● - - ● ● Directional earth-fault, high-set stage ● ● - - ● ● Non-directional (cross country) earth fault, using calculated Io ● ● - - ● ● Transient/intermittent earth fault ● ● - - ● ● Non-directional earth fault, low-set stage - - ● ● - - Non-directional earth fault, high-set stage - - ● ● - - Non-directional earth fault, instantaneous stage - - ● ● - - Non-directional sensitive earth fault - - ● ● - - Negative-sequence overcurrent, instance 1 ● ● ● ● ● ● Negative-sequence overcurrent, instance 2 ● ● ● ● ● ● Phase discontinuity ● ● ● ● ● ● Thermal overload ● ● ● ● ● ● Circuit-breaker failure ● ● ● ● ● ● Three-phase overvoltage, instance 1 - - - - - ● Three-phase overvoltage, instance 2 - - - - - ● Three-phase overvoltage, instance 3 - - - - - ● Positive-sequence undervoltage - - - - - ● Negative-sequence overvoltage - - - - - ● Residual overvoltage, instance 1 - - - - - ● Residual overvoltage, instance 2 - - - - - ● Residual overvoltage, instance 3 - - - - - ● Table continues on next page 1MRS756378 D Section 2 REF615 overview REF615 17 Application Manual

- - - - - ● Three-phase undervoltage, instance 2 - - - - - ● Three-phase undervoltage, instance 3 - - - - - ● Three-phase inrush current detection ● ● ● ● ● ● Arc protection with three sensors ￮ ￮ ￮ ￮ ￮ ￮ Control Circuit breaker control with basic interlocking1) ● ● ● ● ● ● Circuit breaker control with extended interlocking2) - ● - ● ● ● Auto-reclosing of one circuit breaker ￮ ￮ ￮ ￮ ￮ ￮ Supervision and monitoring Fuse failure supervision - - - - ● ● Current circuit supervision - - - - ● ● Circuit breaker condition monitoring - ● - ● ● ● Trip-circuit supervision of two trip circuits ● ● ● ● ● ● Disconnector position indication - ● - ● ● ● Earthing switch position indication - ● - ● ● ● Measurement Transient disturbance recorder ● ● ● ● ● ● Three-phase current ● ● ● ● ● ● Current sequence components ● ● ● ● ● ● Three-phase voltage - - - - ● ● Voltage sequence components - - - - ● ● Residual current ● ● ● ● ● ● Residual voltage ● ● - - ● ● Power, including power factor - - - - ● ● Energy - - - - ● ● ● = Included,○ = Optional at the time of the order 1) Basic interlocking functionality: Closing of the circuit breaker can be enabled by a binary input signal. The actual interlocking scheme is implemented outside the IED. The binary input serves as a “master interlocking input” and when energized it will enable circuit breaker closing. 2) Extended interlocking functionality: The circuit breaker interlocking scheme is implemented in the IED configuration, based on primary equipment position information (via binary inputs) and the logical functions available. The signal matrix tool of PCM600 can be used for modifying the interlocking scheme to suit your application. 2.2.2 Optional functions The optional functions available in the IED are: Section 2 1MRS756378 D REF615 overview 18 REF615 Application Manual

• IEC 60870-5-103 • DNP 3.0 TCP/IP or serial 2.3 Physical hardware The IED consists of two main parts: plug-in unit and case. The plug-in unit content depends on the ordered functionality. Table 4: Plug-in unit and case Main unit Slot ID Content options Plug-in unit - HMI Small (4 lines, 16 characters) Large (8 lines, 16 characters) X100 Auxiliary power/BO module 48-250 V DC/100-240 V AC; or 24-60 V DC 2 normally-open PO contacts 1 change-over SO contacts 1 normally open SO contact 2 double-pole PO contacts with TCS 1 dedicated internal fault output contact X110 BI/O module Only with configurations B, D, E and F: 8 BIs 4 SO contacts X120 AI/BI module Only with configurations A and B: 3 phase current inputs (1/5 A) 1 residual current input (1/5 A or 0.2/1 A)1) 1 residual voltage input (100, 110, 115 or 120 V) 3 BIs Only with configurations C, D, E and F: 3 phase current inputs (1/5 A) 1 residual current input (1/5 A or 0.2/1 A)1) 4 BIs Case X130 AI/BI module Only with configurations E and F: 3 phase voltage inputs (100, 110, 115 or 120 V) 1 residual voltage input (100, 110, 115 or 120 V) 4 BIs Optional BI/O module Only with configurations B and D: 6 BIs 3 SO contacts X90 Optional communication module See technical manual for details about different type of communication modules. 1) The 0.2/1 A input is normally used in applications requiring sensitive earth-fault protection and featuring core-balance current transformers. The rated input levels are selected in the IED software for phase current, residual current and residual voltage. The binary input thresholds 18...176 V DC are selected by adjusting the IED's parameter settings. 1MRS756378 D Section 2 REF615 overview REF615 19 Application Manual

See the Installation Manual for more information about the case and the plug-in unit. Table 5: Number of physical connections in standard configurations Conf. Analog channels Binary channels CT VT BI BO A 4 1 3 6 B 4 1 11 (17)1) 10 (13)1) C 4 - 4 6 D 4 - 12 (18)1) 10 (13)1) E 4 52) 16 10 F 4 52) 16 10 1) With optional BIO module 2) One of the five channels reserved for future applications Section 2 1MRS756378 D REF615 overview 20 REF615 Application Manual

Figure 1: LHMI The LHMI of the IED contains the following elements: • Display • Buttons • LED indicators • Communication port The LHMI is used for setting, monitoring and controlling. 2.4.1 LCD The LHMI includes a graphical LCD that supports two character sizes. The character size depends on the selected language. The amount of characters and rows fitting the view depends on the character size: 1MRS756378 D Section 2 REF615 overview REF615 21 Application Manual

Characters on row Small, mono-spaced (6x12 pixels) 5 rows 10 rows with large screen 20 Large, variable width (13x14 pixels) 4 rows 8 rows with large screen min 8 The display view is divided into four basic areas: 1 2 3 4 A070705 V2 EN Figure 2: Display layout 1 Header 2 Icon 3 Content 4 Scroll bar (displayed when needed) 2.4.2 LEDs The LHMI includes three protection indicators above the display: Ready, Start and Trip. There are also 11 matrix programmable alarm LEDs on front of the LHMI. The LEDs can be configured with PCM600 and the operation mode can be selected with the LHMI and PST. 2.4.3 Keypad The LHMI keypad consists of push-buttons which are used to navigate in different views or menus. With push-buttons you can give open or close commands to one primary object, for example, a circuit breaker, disconnector or switch. The push- buttons are also used to acknowledge alarms, reset indications, provide help and switch between local and remote control mode. Section 2 1MRS756378 D REF615 overview 22 REF615 Application Manual

Figure 3: LHMI keypad with object control, navigation and command push- buttons and RJ-45 communication port 2.5 WHMI The WHMI enables the user to access the IED via a web browser. The supported web browser version is Internet Explorer 7.0 or later. WHMI is disabled by default. WHMI offers the following functions: • Alarm indications and event lists • System supervision • Parameter settings • Measurement display • Disturbance records • Phasor diagram The menu tree structure on the WHMI is almost identical to the one on the LHMI. 1MRS756378 D Section 2 REF615 overview REF615 23 Application Manual

Figure 4: Example view of the WHMI The WHMI can be accessed: • Locally by connecting your laptop to the IED via the front communication port. • Remotely over LAN/WAN. 2.6 Authorization The user categories have been predefined for the LHMI and the WHMI, each with different rights and default passwords. The default passwords can be changed with Administrator user rights. User authorization is disabled by default but WHMI always uses authorization. Section 2 1MRS756378 D REF615 overview 24 REF615 Application Manual

Username User rights VIEWER Read only access OPERATOR • Selecting remote or local state with (only locally) • Changing setting groups • Controlling • Clearing alarm and indication LEDs and textual indications ENGINEER • Changing settings • Clearing event list • Clearing disturbance records • Changing system settings such as IP address, serial baud rate or disturbance recorder settings • Setting the IED to test mode • Selecting language ADMINISTRATOR • All listed above • Changing password For user authorization for PCM600, see PCM600 documentation. 2.7 Communication The IED supports different communication protocols: IEC 61850-8-1, DNP 3.0, IEC 60870-5-103 and Modbus®. Operational information and controls are available through these protocols. However, some communication functionality, for example, horizontal communication between the IEDs and parameters setting, is only enabled by the IEC 61850 communication protocol. The IEC 61850 communication implementation supports all monitoring and control functions. Additionally, parameter setting and disturbance file records can be accessed using the IEC 61850-8-1 protocol. Further, the IED can send and receive binary signals from other IEDs (so called horizontal communication) using the IEC61850-8-1 GOOSE profile, where the highest performance class with a total transmission time of 3 ms is supported. The IED can simultaneously report to five different IEC 61850-8-1 clients. The IED can support five simultaneous clients. If PCM600 reserves one client connection, only four client connections are left, for example, for IEC 61850 and Modbus. All communication connectors, except for the front port connector, are placed on integrated optional communication modules. The IED can be connected to Ethernet- based communication systems via the RJ-45 connector (100BASE-TX) or the fibre- 1MRS756378 D Section 2 REF615 overview REF615 25 Application Manual

RS-232/RS-485 communication. Section 2 1MRS756378 D REF615 overview 26 REF615 Application Manual

REF615 is intended for protection and control mainly in MV feeder applications. The product has a number of standard configurations covering a wide range of primary circuit configurations in distribution networks based on different system earthing methods. Some of the functions included in the IED's standard configurations are optional at the time of placing the order. The description of standard configurations covers the full functionality including options, presenting the functionality, flexibility and external connections of REF615 with a specific configuration as delivered from the factory. 3.2 Presentation of standard configurations Functional diagrams The functional diagrams describe the IED's functionality from the protection, measuring, condition monitoring, disturbance recording, control and interlocking perspective. Diagrams show the default functionality with simple symbol logics forming principle diagrams. The external connections to primary devices are also shown, stating the default connections to measuring transformers. The positive measuring direction of directional protection functions is towards the outgoing feeder. The functional diagrams are divided into sections which each constitute one functional entity. The external connections are also divided into sections. Only the relevant connections for a particular functional entity are presented in each section. Protection function blocks are part of the functional diagram. They are identified based on their IEC 61850 name but the IEC based symbol and the ANSI function number are also included. Some function blocks, such as PHHPTOC, are used several times in the configuration. To separate the blocks from each other, the IEC 61850 name, IEC symbol and ANSI function number are appended with a running number, that is an instance number, from one upwards. If the block has no suffix after the IEC or ANSI symbol, the function block has been used, that is, instantiated, only once. The IED’s internal functionality and the external connections are separated with a dashed line presenting the IED’s physical casing. 1MRS756378 D Section 3 REF615 variants REF615 27 Application Manual

With SMT the user can modify the standard configuration according to the actual needs. The IED is delivered from the factory with default connections described in the functional diagrams for BI's, BO's, function to function connections and alarm LEDs. SMT has a number of different page views, designated as follows: • Binary input • Binary output • Functions The functions in different page views are identified by the IEC 61850 names with analogy to the functional diagrams. 3.2.1 Standard configurations The IED is available with six alternative standard configurations. The table indicates the functions supported by the different IED configurations. Table 7: Standard configurations Description Std. conf. Non-directional overcurrent and directional earth-fault protection A and B Non-directional overcurrent and non-directional earth-fault protection C and D Non-directional overcurrent and directional earth-fault protection with phase-voltage based measurements E Directional overcurrent and earth-fault protection with phase-voltage based measurements, undervoltage and overvoltage protection F Table 8: Supported functions Functionality A B C D E F Protection Three-phase non-directional overcurrent, low-set stage ● ● ● ● ● - Three-phase non-directional overcurrent, high-set stage, instance 1 ● ● ● ● ● - Three-phase non-directional overcurrent, high-set stage, instance 2 ● ● ● ● ● - Three-phase non-directional overcurrent, instantaneous stage ● ● ● ● ● ● Three-phase directional overcurrent, low-set stage, instance 1 - - - - - ● Three-phase directional overcurrent, low-set stage, instance 2 - - - - - ● Three-phase directional overcurrent, high-set stage - - - - - ● Directional earth-fault, low-set stage, instance 1 ● ● - - ● ● Directional earth-fault, low-set stage, instance 2 ● ● - - ● ● Directional earth-fault, high-set stage ● ● - - ● ● Non-directional (cross country) earth fault, using calculated Io ● ● - - ● ● Transient/intermittent earth fault ● ● - - ● ● Non-directional earth fault, low-set stage - - ● ● - - Table continues on next page Section 3 1MRS756378 D REF615 variants 28 REF615 Application Manual

- - ● ● - - Non-directional earth fault, instantaneous stage - - ● ● - - Non-directional sensitive earth fault - - ● ● - - Negative-sequence overcurrent, instance 1 ● ● ● ● ● ● Negative-sequence overcurrent, instance 2 ● ● ● ● ● ● Phase discontinuity ● ● ● ● ● ● Thermal overload ● ● ● ● ● ● Circuit-breaker failure ● ● ● ● ● ● Three-phase overvoltage, instance 1 - - - - - ● Three-phase overvoltage, instance 2 - - - - - ● Three-phase overvoltage, instance 3 - - - - - ● Positive-sequence undervoltage - - - - - ● Negative-sequence overvoltage - - - - - ● Residual overvoltage, instance 1 - - - - - ● Residual overvoltage, instance 2 - - - - - ● Residual overvoltage, instance 3 - - - - - ● Three-phase undervoltage, instance 1 - - - - - ● Three-phase undervoltage, instance 2 - - - - - ● Three-phase undervoltage, instance 3 - - - - - ● Three-phase inrush current detection ● ● ● ● ● ● Arc protection with three sensors ￮ ￮ ￮ ￮ ￮ ￮ Control Circuit breaker control with basic interlocking1) ● ● ● ● ● ● Circuit breaker control with extended interlocking2) - ● - ● ● ● Auto-reclosing of one circuit breaker ￮ ￮ ￮ ￮ ￮ ￮ Supervision and monitoring Fuse failure supervision - - - - ● ● Current circuit supervision - - - - ● ● Circuit breaker condition monitoring - ● - ● ● ● Trip-circuit supervision of two trip circuits ● ● ● ● ● ● Disconnector position indication - ● - ● ● ● Earthing switch position indication - ● - ● ● ● Measurement Transient disturbance recorder ● ● ● ● ● ● Three-phase current ● ● ● ● ● ● Current sequence components ● ● ● ● ● ● Three-phase voltage - - - - ● ● Voltage sequence components - - - - ● ● Residual current ● ● ● ● ● ● Table continues on next page 1MRS756378 D Section 3 REF615 variants REF615 29 Application Manual

- - - - ● ● Energy - - - - ● ● ● = Included,○ = Optional at the time of the order 1) Basic interlocking functionality: Closing of the circuit breaker can be enabled by a binary input signal. The actual interlocking scheme is implemented outside the IED. The binary input serves as a “master interlocking input” and when energized it will enable circuit breaker closing. 2) Extended interlocking functionality: The circuit breaker interlocking scheme is implemented in the IED configuration, based on primary equipment position information (via binary inputs) and the logical functions available. The signal matrix tool of PCM600 can be used for modifying the interlocking scheme to suit your application. Section 3 1MRS756378 D REF615 variants 30 REF615 Application Manual

Figure 5: Connection diagram for configurations A and B (overcurrent and directional earth-fault protection) [1] [1] Additional BIO-module (X110 in the diagram) is included in the IED variant B 1MRS756378 D Section 3 REF615 variants REF615 31 Application Manual

Figure 6: Connection diagram for configurations C and D (overcurrent and non-directional earth-fault protection) [2] [2] Additional BIO-module (X110 in the diagram) is included in the IED variant D Section 3 1MRS756378 D REF615 variants 32 REF615 Application Manual

Figure 7: Connection diagram for configurations E and F (directional overcurrent and earth-fault protection with phase-to-phase voltage measurement) 1MRS756378 D Section 3 REF615 variants REF615 33 Application Manual

Figure 8: Connection diagram for configurations E and F (directional overcurrent and earth-fault protection with phase-to-earth voltage measurement) 3.3 Standard configuration A including directional earth- fault protection 3.3.1 Applications The standard configuration for directional earth-fault protection is mainly intended for cable and overhead line feeder applications in isolated and resonant-earthed distribution networks. The IED with this standard configuration is delivered from the factory with default settings and parameters. The end-user flexibility for incoming, outgoing and internal signal designation within the IED enables this configuration to be further adapted to different primary circuit layouts and the related functionality needs by modifying the internal functionality using PCM600. Section 3 1MRS756378 D REF615 variants 34 REF615 Application Manual

protection Function IEC 61850 IEC ANSI Three-phase non-directional overcurrent protection, low stage PHLPTOC1 3I> 51P-1 Three-phase non-directional overcurrent protection, high stage, instance 1 PHHPTOC1 3I>> (1) 51P-2 (1) Three-phase non-directional overcurrent protection, high stage, instance 2 PHHPTOC2 3I>> (2) 51P-2 (2) Three-phase non-directional overcurrent protection, instantaneous stage PHIPTOC1 3I>>> 50P/51P Arc protection ARCSARC1 ARCSARC2 ARCSARC3 ARC (1) ARC (2) ARC (3) 50L/50NL (1) 50L/50NL (2) 50L/50NL (3) Directional earth-fault protection, low stage, instance 1 DEFLPDEF1 I0> → (1) 67N-1 (1) Directional earth-fault protection, low stage, instance 2 DEFLPDEF2 I0> → (2) 67N-1 (2) Directional earth-fault protection, high stage DEFHPDEF1 I0>> → 67N-2 Transient/intermittent earth-fault protection INTRPTEF1 I0> → IEF 67NIEF Non-directional earth-fault protection, high stage, calculated I0 current (Double earth-fault protection) EFHPTOC1 I0>> 51N-2 Negative-sequence overcurrent protection, instance 1 NSPTOC1 I2> (1) 46 (1) Negative-sequence overcurrent protection, instance 2 NSPTOC2 I2> (2) 46 (2) Phase discontinuity PDNSPTOC1 I2/I1> 46PD Three-phase inrush detector INRPHAR1 3I2f> 68 Three-phase thermal protection for feeders, cables and distribution transformers T1PTTR1 3Ith> 49F Autoreclosure DARREC1 O → I 79 Circuit breaker failure protection CCBRBRF1 3I>/I0>BF 51BF/51NBF Master Trip TRPPTRC1 TRPPTRC2 Master Trip (1) Master Trip (2) 94/86 (1) 94/86 (2) Trip circuit supervision, instance 1 TCSSCBR1 TCS (1) TCM (1) Trip circuit supervision, instance 2 TCSSCBR2 TCS (2) TCM (2) Disturbance recorder RDRE1 - - Three-phase current measurement CMMXU1 3I 3I Sequence current measurement CSMSQI1 I1, I2, I0 I1, I2, I0 Residual current measurement RESCMMXU1 I0 In Residual voltage measurement RESVMMXU1 U0 Vn 1MRS756378 D Section 3 REF615 variants REF615 35 Application Manual

Binary Input Default usage Connector-Pins X120-BI1 Blocking of Overcurrent Instantaneous Stage X120-1,2 X120-BI2 Circuit Breaker Closed position indication X120-3,2 X120-BI3 Circuit Breaker Open position indication X120-4,2 Binary Output Default usage Connector-Pins X100-PO1 Close Circuit Breaker X100-6,7 X100-PO2 Circuit Breaker Failure protection trip to upstream breaker X100-8,9 X100-PO3 Open Circuit Breaker / trip coil 1 X100-16,17,18,19 X100-PO4 Open Circuit Breaker / trip coil 2 X100-20,21,22,23 X100-SO1 General Start Indication X100-10,11,12 X100-SO2 General Operate Indication X100-13,14,15 LED Default usage 1 Non-Directional Overcurrent Operate 2 Directional/Intermittent Earth fault Operate 3 Double (Cross country) Earth fault Operate 4 Negative Seq. Overcurrent/Phase Discontinuity Operate 5 Thermal Overload Alarm 6 Breaker Failure Operate 7 Disturbance Recorder Triggered 8 Not connected 9 Trip Circuit Supervision Alarm 10 ARC Protection Operate 11 Auto Reclose in Progress 3.3.3 Functional diagrams The functional diagrams describe the default input, output, alarm LED and function to function connections. The default connections can be viewed with SMT and changed according to the application requirements, if necessary. The analog channels, measurements from CTs and VTs, have fixed connections towards the different function blocks inside the IED’s standard configuration. Exceptions from this rule are the 12 analog channels available for the disturbance recorder function. These channels are freely selectable and a part of the disturbance recorder’s parameter settings, thus not included in the SMT functionality. Section 3 1MRS756378 D REF615 variants 36 REF615 Application Manual

diagrams. The common signal marked with 3I represents the three phase currents. The signal marked with I0 represents the measured residual current via a core balance CT. The signal marked with U0 represents the measured residual voltage via open delta connected VTs. The EFHPTOC protection function block for double (cross-country) earth-faults uses the calculated residual current originating from the measured phase currents. 3.3.3.1 Functional diagrams for protection The following functional diagrams describe the IED’s protection functionality in detail and according to the factory set default connections in SMT. A071316 V3 EN Figure 9: Overcurrent protection 1MRS756378 D Section 3 REF615 variants REF615 37 Application Manual

instantaneous stage (PHIPTOC1) can be blocked by energizing the binary input 1 (X120:1-2). Two negative sequence overcurrent stages (NSPTOC1 and NSPTOC2) are offered for phase unbalance protection. The inrush detection block’s (INRPHAR1) output BLK2H caters the possibility to either block the function or multiply the active settings for any of the shown protection function blocks. All operate signals are connected to the Master Trip and also to the alarm LEDs. LED 1 is used for overcurrent and LED 4 for negative sequence overcurrent protection operate indication. LED 4 is also used for phase discontinuity protection operate indication. There are four IED variant specific setting groups. Parameters can be set independently for each setting group. The active setting group (1...4) can be changed with a parameter. The change of an active setting group can also be made via a binary input if the binary input is enabled for this. To enable the change of the active setting group via a binary input, connect a free binary input with SMT to the ActSG input of the SGCB-block. Table 10: Binary input states and corresponding active setting groups BI State Active setting group OFF 1 ON 2 The active setting group defined by a parameter is overridden when a binary input is enabled for changing the active setting group. Section 3 1MRS756378 D REF615 variants 38 REF615 Application Manual

Figure 10: Directional earth-fault protection Three stages are offered for directional earth-fault protection. In addition, there is a dedicated protection stage (INTRPTEF) either for transient based earth-fault protection or for cable intermittent earth-fault protection in compensated networks. A dedicated non-directional earth-fault protection block (EFHPTOC) is intended for protection against double earth-fault situations in isolated or compensated networks. This protection function uses the calculated residual current originating from the phase currents. All operate signals are connected to the Master Trip and also to the alarm LEDs. LED 2 is used for directional earth-fault and LED 3 for double earth-fault protection operate indication. 1MRS756378 D Section 3 REF615 variants REF615 39 Application Manual

Figure 11: Phase discontinuity, thermal overload and circuit breaker failure protection The phase discontinuity protection (PDNPSTOC1) provides protection for interruptions in the normal three-phase load supply, for example, in downed conductor situations. The thermal overload protection (T1PTTR1) provides indication on overload situations. The operate signal of the phase discontinuity protection is connected to the Master Trip and also to an alarm LED. LED 4 is used for the phase discontinuity protection operate indication, the same as for negative sequence overcurrent protection operate indication, and LED 5 is used for the thermal overload protection alarm indication. The breaker failure protection (CCBRBRF1) is initiated via the start input by a number of different protection stages in the IED. The breaker failure protection function offers different operating modes associated with the circuit breaker position and the measured phase and residual currents. The breaker failure protection has two operating outputs: TRRET and TRBU. The TRRET operate output is used for re- tripping its own breaker through the Master Trip 2. The TRBU output is used to give a back-up trip to the breaker feeding upstream. For this purpose, the TRBU operate output signal is connected to the output PO2 (X100: 8-9). LED 6 is used for back-up (TRBU) operate indication. Section 3 1MRS756378 D REF615 variants 40 REF615 Application Manual

Figure 12: Arc protection ARC protection (ARCSARC1-3) and autoreclosing (DARREC1) are included as optional functions. The ARC protection offers individual function blocks for three ARC sensors that can be connected to the IED. Each ARC protection function block has two different operation modes, with or without the phase and residual current check. Operate signals from the ARC protection function blocks are connected to the Master Trip and also to the alarm LED 10 as a common operate indication. The autorecloser is configured to be initiated by operate signals from a number of protection stages through the INIT1-5 inputs. It is possible to create individual autoreclose sequences for each input. The autoreclose function can be blocked with the INHIBIT_RECL input. As a default, the operation of selected protection functions are connected to this input. A control 1MRS756378 D Section 3 REF615 variants REF615 41 Application Manual

function via the CBXCBR-selected signal. The circuit breaker availability for the autoreclosure sequence is expressed with the CB_RDY input in DARREC1. In the configuration, this signal is not connected to any of the binary inputs. As a result, the function assumes that the breaker is available all the time. The autoreclose sequence in progress indication is connected to the alarm LED 11. 3.3.3.2 Functional diagrams for disturbance recorder and trip circuit supervision PHLPTOC1-start PHHPTOC1-start PHHPTOC2-start PHIPTOC1-start NSPTOC1-start NSPTOC2-start DEFLPDEF1-start DEFLPDEF2-start DEFHPDEF1-start INTRPTEF1-start EFHPTOC1-start PDNSPTOC1-start T1PTTR1-start CCRBRF1-trret CCRBRF1-trbu OR PHLPTOC1-operate PHHPTOC1-operate PHHPTOC2-operate PHIPTOC1-operate LED7 (DR TRIGGERED) OR OR INTRPTEF1-operate EFHPTOC1-operate PDNSPTOC1-operate INRPHAR1-blk2h T1PTTR1-operate OR ARCSARC1-operate ARCSARC2-operate ARCSARC3-operate DARREC1-inpro OR NSPTOC1-operate NSPTOC2-operate ARCSARC1-fault_arc_det ARCSARC2-fault_arc_det ARCSARC3-fault_arc_det DEFLPDEF1-operate DEFLPDEF2-operate DEFHPDEF1-operate DARREC1-close cb DARREC1-unsuc_recl BI 1 (Blocking) BI 2 (CB Closed) BI 3 (CB Open) DISTURBANCE RECORDER TCSSCBR1 ALARM BLOCK TCSSCBR2 ALARM BLOCK OR OR TRPPTRC1- trip TRPPTRC2- trip LED9 (TCS ALARM) TRIP CIRCUIT SUPERVISION RDRE1 TRIGGERED BI#1 BI#2 BI#3 BI#4 BI#5 BI#6 BI#7 BI#8 BI#9 BI#10 BI#11 BI#12 BI#13 BI#14 BI#15 BI#16 BI#17 BI#18 BI#19 BI#20 BI#21 BI#22 BI#23 BI#24 BI#25 BI#26 BI#27 BI#28 BI#29 BI#30 BI#31 BI#32 A071324 V4 EN Figure 13: Disturbance recorder The disturbance recorder has 64 digital inputs, of which 32 are connected as default. All start and operate signals from the protection stages are routed to trigger the disturbance recorder or alternatively only to be recorded by the disturbance recorder depending on the parameter settings. Additionally, the selected autorecloser, the ARC protection signals and the three binary inputs from X120 are also connected. Section 3 1MRS756378 D REF615 variants 42 REF615 Application Manual

and TCSSCBR2 for PO4 (X100:20-23). Both functions are blocked by the Master Trip and the circuit breaker open position signal. The TCS alarm indication is connected to LED 9. 3.3.3.3 Functional diagrams for control and interlocking A071326 V4 EN Figure 14: Master trip The operate signals from the protections described above are connected to the two trip output contacts PO3 (X100:16-19) and PO4 (X100:20-23) via the corresponding Master Trips TRPPTRC1 and TRPPTRC2. The open control commands to the circuit breaker from local or remote CBXCBR1-exe_op or from the auto-recloser DARREC1-open_cb are connected directly to the output PO3 (X100:16-19). The TRPPTRC1 and 2 blocks provide the lockout/latching function, event generation and the trip signal duration setting. If the lockout operation mode is selected, one binary input can be re-assigned to the RST_LKOUT input of the Master Trip to enable external reset with a push button. 1MRS756378 D Section 3 REF615 variants REF615 43 Application Manual

Figure 15: Circuit breaker control The ENA_CLOSE input, that is, enable the closing of the circuit breaker, in the breaker control function block CBXCBR is a combination of the status of the Master Trip. The open operation is always enabled. If the ENA_CLOSE signal is completely removed from the breaker control function block CBXCBR with SMT, the function assumes that the breaker close commands are allowed continuously. A071330 V3 EN Figure 16: Alarm indication The signal outputs from the IED are connected to give dedicated information on: • start of any protection function SO1 (X100:10-12) • operation (trip) of any protection function SO2 (X100:13-15). Section 3 1MRS756378 D REF615 variants 44 REF615 Application Manual

outputs. There are four generic timers (TPGAPC1..4) available in the IED. The remaining ones not described in the functional diagram are available in SMT for connection where applicable. 3.4 Standard configuration B including directional earth- fault protection and CB condition monitoring 3.4.1 Applications The standard configuration for directional earth-fault protection is mainly intended for cable and overhead line feeder applications in isolated and resonant-earthed distribution networks. The IED with this standard configuration is delivered from the factory with default settings and parameters. The end-user flexibility for incoming, outgoing and internal signal designation within the IED enables this configuration to be further adapted to different primary circuit layouts and the related functionality needs by modifying the internal functionality using PCM600. 3.4.2 Functions Table 11: Functions included in the REF615 standard configuration with directional earth-fault protection Function IEC 61850 IEC ANSI Three-phase non-directional overcurrent protection, low stage PHLPTOC1 3I> 51P-1 Three-phase non-directional overcurrent protection, high stage, instance 1 PHHPTOC1 3I>> (1) 51P-2 (1) Three-phase non-directional overcurrent protection, high stage, instance 2 PHHPTOC2 3I>> (2) 51P-2 (2) Three-phase non-directional overcurrent protection, instantaneous stage PHIPTOC1 3I>>> 50P/51P Arc protection ARCSARC1 ARCSARC2 ARCSARC3 ARC (1) ARC (2) ARC (3) 50L/50NL (1) 50L/50NL (2) 50L/50NL (3) Directional earth-fault protection, low stage, instance 1 DEFLPDEF1 I0> → (1) 67N-1 (1) Directional earth-fault protection, low stage, instance 2 DEFLPDEF2 I0> → (2) 67N-1 (2) Directional earth-fault protection, high stage DEFHPDEF1 I0>> → 67N-2 Transient/intermittent earth-fault protection INTRPTEF1 I0> → IEF 67NIEF Non-directional earth-fault protection, high stage, calculated I0 current (Double earth-fault protection) EFHPTOC1 I0>> 51N-2 Negative-sequence overcurrent protection, instance 1 NSPTOC1 I2> (1) 46 (1) Table continues on next page 1MRS756378 D Section 3 REF615 variants REF615 45 Application Manual

instance 2 NSPTOC2 I2> (2) 46 (2) Phase discontinuity PDNSPTOC1 I2/I1> 46PD Three-phase inrush detector INRPHAR1 3I2f> 68 Three-phase thermal protection for feeders, cables and distribution transformers T1PTTR1 3Ith> 49F Autoreclosure DARREC1 O → I 79 Circuit breaker failure protection CCBRBRF1 3I>/I0>BF 51BF/51NBF Master Trip TRPPTRC1 TRPPTRC2 Master trip (1) Master trip (2) 94/86 (1) 94/86 (2) Trip circuit supervision, instance 1 TCSSCBR1 TCS (1) TCM (1) Trip circuit supervision, instance 2 TCSSCBR2 TCS (2) TCM (2) Disturbance recorder RDRE1 - - Circuit breaker condition monitoring SSCBR1 CBCM CBCM Three-phase current measurement CMMXU1 3I 3I Sequence current measurement CSMSQI1 I1, I2, I0 I1, I2, I0 Residual current measurement RESCMMXU1 I0 In Residual voltage measurement RESVMMXU1 U0 Vn 3.4.2.1 Default I/O connections Binary Input Default usage Connector-Pins X110-BI2 Directional Earth Fault Protection's Basic Angle Control X110-3,4 X110-BI3 Circuit Breaker low Gas Pressure indication X110-5,6 X110-BI4 Circuit Breaker Spring Charged indication X110-6,7 X110-BI5 CB Truck in (Service position) indication X110-8,9 X110-BI6 CB Truck out (Test position) indication X110-10,9 X110-BI7 Earthing Switch Closed indication X110-11,12 X110-BI8 Earthing Switch Open indication X110-13,12 X120-BI1 Blocking of Overcurrent Instantaneous Stage X120-1,2 X120-BI2 Circuit Breaker Closed indication X120-3,2 X120-BI3 Circuit Breaker Open indication X120-4,2 Binary Output Default usage Connector-Pins X100-PO1 Close Circuit Breaker X100-6,7 X100-PO2 Circuit Breaker Failure protection trip to upstream breaker X100-8,9 X100-PO3 Open Circuit Breaker / trip coil 1 X100-16,17,18,19 X100-PO4 Open Circuit Breaker / trip coil 2 X100-20,21,22,23 X100-SO1 General Start Indication X100-10,11,12 X100-SO2 General Operate Indication X100-13,14,15 Table continues on next page Section 3 1MRS756378 D REF615 variants 46 REF615 Application Manual

X110-14,15,16 X110-SO2 Overcurrent Operate Alarm X110-17,18,19 X110-SO3 Earth fault Operate Alarm X110-20,21,22 LED Default usage 1 Non-Directional Overcurrent Operate 2 Directional/Intermittent Earth fault Operate 3 Double (Cross country) Earth fault Operate 4 Negative Seq. Overcurrent/Phase Discontinuity Operate 5 Thermal Overload Alarm 6 Breaker Failure Operate 7 Disturbance Recorder Triggered 8 Circuit Breaker Condition Monitoring Alarm 9 Trip Circuit Supervision Alarm 10 ARC Protection Operate 11 Auto Reclose in Progress 3.4.3 Functional diagrams The functional diagrams describe the default input, output, alarm LED and function- to-function connections. The default connections can be viewed with SMT and changed according to the application requirements, if necessary. The analog channels, measurements from CTs and VTs, have fixed connections towards the different function blocks inside the IED’s standard configuration. Exceptions from this rule are the 12 analog channels available for the disturbance recorder function. These channels are freely selectable and a part of the disturbance recorder’s parameter settings, thus not included in the SMT functionality. The analog channels are assigned to different functions as shown in the functional diagrams. The common signal marked with 3I represents the three phase currents. The signal marked with I0 represents the measured residual current via a core balance CT. The signal marked with U0 represents the measured residual voltage via open delta connected VTs. The EFHPTOC protection function block for double (cross-country) earth-faults uses the calculated residual current originating from the measured phase currents. 3.4.3.1 Functional diagrams for protection The following functional diagrams describe the IED’s protection functionality in detail and according to the factory set default connections in SMT. 1MRS756378 D Section 3 REF615 variants REF615 47 Application Manual

Figure 17: Overcurrent protection Four overcurrent stages are offered for overcurrent and short-circuit protection. The instantaneous stage (PHIPTOC1) can be blocked by energizing the binary input 1 (X120:1-2). Two negative sequence overcurrent stages (NPSTOC1 and NPSTOC2) are offered for phase unbalance protection. The inrush detection block’s (INRPHAR1) output BLK2H caters the possibility to either block the function or multiply the active settings for any of the shown protection function blocks. All operate signals are connected to the Master Trip and also to the alarm LEDs. LED 1 is used for overcurrent and LED 4 for negative sequence overcurrent protection operate indication. LED 4 is also used for phase discontinuity protection operate indication. The upstream blocking from the start of the overcurrent second high stage (PHHPTOC2) is connected to the output SO1 (X110:14-16). This output is used for sending a blocking signal to the relevant overcurrent protection stage of the IED at the infeeding bay. Section 3 1MRS756378 D REF615 variants 48 REF615 Application Manual

independently for each setting group. The active setting group (1...4) can be changed with a parameter. The change of an active setting group can also be made via a binary input if the binary input is enabled for this. To enable the change of an active setting group via a binary input, connect a free binary input with SMT to the ActSG input of the SGCB-block. Table 12: Binary input states and corresponding active setting groups BI State Active setting group OFF 1 ON 2 The active setting group defined by a parameter is overridden when a binary input is enabled for changing the active setting group. I > (1) DEFLPDEF1 START OPERATE I0 U0 ENA_MULT 67N-1 (1) 0 RCA_CTL BLOCK I > (2) DEFLPDEF2 START OPERATE I0 U0 ENA_MULT 67N-1 (2) 0 RCA_CTL BLOCK I >> DEFHPDEF START OPERATE I0 U0 ENA_MULT 67N-2 0 RCA_CTL BLOCK LED2 (DEF OPERATE) OR DIRECTIONAL OR INTERMITTENT EARTH FAULT PROTECTION DOUBLE (CROSS COUNTRY) EARTH FAULT PROTECTION LED3 (NEF OPERATE) I >> EFHPTOC1 START OPERATE I0 BLOCK ENA_MULTI 51N-2 0 Calculated Io X110 3 4 BI 2 (BACTRL) INTRPTEF1 START OPERATE U0 BLOCK BLK_EF 67NIEF I > 0 I0 A071334 V4 EN Figure 18: Directional earth-fault protection 1MRS756378 D Section 3 REF615 variants REF615 49 Application Manual

dedicated protection stage (INTRPTEF) either for transient based earth-fault protection or for cable intermittent earth-fault protection in compensated networks. A dedicated non-directional earth-fault protection block (EFHPTOC) is intended for protection against double earth-fault situations in isolated or compensated networks. This protection function uses the calculated residual current originating from the phase currents. The binary input 2 (X110:3-4) is intended for directional earth-fault protection blocks’ Relay Characteristic Angle (RCA: 0°/-90°) or operation mode (I0Sinφ/ I0Cosφ) change. All operate signals are connected to the Master Trip and also to the alarm LEDs. LED 2 is used for directional earth-fault and LED 3 for double earth- fault protection operate indication. A071320 V4 EN Figure 19: Phase discontinuity, thermal overload and circuit breaker failure protection The phase discontinuity protection (PDNSPTOC1) provides protection for interruptions in the normal three-phase load supply, for example, in downed conductor situations. The thermal overload protection (T1PTTR1) provides indication on overload situations. The operate signal of the phase discontinuity protection is connected to the Master Trip and also to an alarm LED. LED 4 is used for the phase discontinuity protection operate indication, the same as for negative sequence overcurrent protection operate indication, and LED 5 is used for the thermal overload protection alarm indication. Section 3 1MRS756378 D REF615 variants 50 REF615 Application Manual

number of different protection stages in the IED. The breaker failure protection function offers different operating modes associated with the circuit breaker position and the measured phase and residual currents. The breaker failure protection has two operating outputs: TRRET and TRBU. The TRRET operate output is used for re- tripping its own breaker through the Master Trip 2. The TRBU output is used to give a back-up trip to the breaker feeding upstream. For this purpose, the TRBU operate output signal is connected to the output PO2 (X100: 8-9). LED 6 is used for back-up (TRBU) operate indication. A071338 V5 EN Figure 20: Arc protection ARC protection (ARCSARC1-3) and autoreclosing (DARREC1) are included as optional functions. 1MRS756378 D Section 3 REF615 variants REF615 51 Application Manual

be connected to the IED. Each ARC protection function block has two different operation modes, with or without the phase and residual current check. Operate signals from the ARC protection function blocks are connected to the Master Trip and also to the alarm LED 10 as a common operate indication. The autorecloser is configured to be initiated by operate signals from a number of protection stages through the INIT1-5 inputs. It is possible to create individual autoreclose sequences for each input. The autoreclose function can be blocked with the INHIBIT_RECL input. As a default, the operation of some selected protection functions are connected to this input. A control command to the circuit breaker, either local or remote, also blocks the autoreclose function via the CBXCBR-selected signal. The circuit breaker availability for the autoreclosure sequence is expressed with the binary input 4 (X110:6-7) by connecting the input signal to the CB_RDY input. In case this signal is completely removed from the autoreclose function block with SMT, the function assumes that the breaker is available all the time. The autoreclose sequence in progress indication is connected to the alarm LED 11. Section 3 1MRS756378 D REF615 variants 52 REF615 Application Manual

PHLPTOC1-start PHHPTOC1-start PHHPTOC2-start PHIPTOC1-start NSPTOC1-start NSPTOC2-start DEFLPDEF1-start DEFLPDEF2-start DEFHPDEF1-start INTRPTEF1-start EFHPTOC1-start PDNSPTOC1-start T1PTTR1-start CCRBRF1-trret CCRBRF1-trbu OR PHLPTOC1-operate PHHPTOC1-operate PHHPTOC2-operate PHIPTOC1-operate LED7 (DR TRIGGERED) OR OR INTRPTEF1-operate EFHPTOC1-operate PDNSPTOC1-operate INRPHAR1-blk2h T1PTTR1-operate OR ARCSARC1-operate ARCSARC2-operate ARCSARC3-operate DARREC1-inpro OR NSPTOC1-operate NSPTOC2-operate ARCSARC1-fault_arc_det ARCSARC2-fault_arc_det ARCSARC3-fault_arc_det DEFLPDEF1-operate DEFLPDEF2-operate DEFHPDEF1-operate DARREC1-close cb DARREC1-unsuc_recl BI 1 (Blocking) BI 2 (CB Closed) BI 3 (CB Open) DISTURBANCE RECORDER TCSSCBR1 ALARM BLOCK TCSSCBR2 ALARM BLOCK OR OR TRPPTRC1- trip TRPPTRC2- trip LED9 (TCS ALARM) TRIP CIRCUIT SUPERVISION RDRE1 TRIGGERED BI#1 BI#2 BI#3 BI#4 BI#5 BI#6 BI#7 BI#8 BI#9 BI#10 BI#11 BI#12 BI#13 BI#14 BI#15 BI#16 BI#17 BI#18 BI#19 BI#20 BI#21 BI#22 BI#23 BI#24 BI#25 BI#26 BI#27 BI#28 BI#29 BI#30 BI#31 BI#32 A071324 V4 EN Figure 21: Disturbance recorder The disturbance recorder has 64 digital inputs, of which 32 are connected as default. All start and operate signals from the protection stages are routed to trigger the disturbance recorder or alternatively only to be recorded by the disturbance recorder depending on the parameter settings. Additionally, the selected autorecloser, the ARC protection signals and the three binary inputs from X120 are also connected. Two separate TCS functions have been included: TCSSCBR1 for PO3 (X100:16-19) and TCSSCBR2 for PO4 (X100:20-23). Both functions are blocked by the Master Trip (TRPPTRC1 and TRPPTRC2) and the circuit breaker open position signal. The TCS alarm indication is connected to LED 9. 1MRS756378 D Section 3 REF615 variants REF615 53 Application Manual

A071326 V4 EN Figure 22: Master trip The operate signals from the protections described above are connected to the two trip output contacts PO3 (X100:16-19) and PO4 (X100:20-23) via the corresponding Master Trips TRPPTRC1 and TRPPTRC2. Open control commands to the circuit breaker from local or remote CBXCBR1-exe_op or from the auto-recloser DARREC1-open_cb are connected directly to the output PO3 (X100:16-19). The TRPPTRC1 and 2 blocks provide the lockout/latching function, event generation and the trip signal duration setting. If the lockout operation mode is selected, one binary input can be re-assigned to the RST_LKOUT input of the Master Trip to enable external reset with a push button. Section 3 1MRS756378 D REF615 variants 54 REF615 Application Manual

Figure 23: Circuit breaker control There are three disconnector status blocks (DCSXSWI1…3) available in the IED. The remaining two not described in the functional diagram are available in SMT for connection where applicable. The binary inputs 5 and 6 of the additional card X110 are used for busbar disconnector (DCSXSWI1) or circuit breaker truck position indication. Primary device position Input to be energized Input 5 (X110:8-9) Input 6 (X110:10-9) Busbar disconnector closed X Busbar disconnector open X CB truck in service position X CB truck in test position X The binary inputs 7 and 8 (X110:11-13) are for the position indication of the line side earthing switch. The circuit breaker closing is enabled when the ENA_CLOSE input is activated. This can be done by the configuration logic, which is a combination of the disconnector or breaker truck and earthing switch position statuses and the statuses of the master 1MRS756378 D Section 3 REF615 variants REF615 55 Application Manual

output from the DCSXSWI block defines if the disconnector or breaker truck is definitely either open/in test position or close/in service position. This, together with the open earthing switch and non-active trip signals, activates the close-enable signal to the circuit breaker control function block. The open operation is always enabled. The auto-recloser close command signals are directly connected to the output contact PO1 (X100:6-7). If the ENA_CLOSE signal is completely removed from the breaker control function block CBXCBR with SMT, the function assumes that the breaker close commands are allowed continuously. The ITL_BYPASS input can be used, for example, to always enable the closing of the circuit breaker when the circuit breaker truck is out in the test position, despite of the interlocking conditions being active when the circuit breaker truck is closed in service position. The circuit breaker condition monitoring function (SSCBR) supervises the circuit breaker status based on the binary input information connected and measured current levels. The function introduces various supervision methods. The corresponding supervision alarm signals are routed to LED 8. Section 3 1MRS756378 D REF615 variants 56 REF615 Application Manual

Figure 24: Alarm indication The signal outputs from the IED are connected to give dedicated information on: • start of any protection function SO1 (X100:10-12) • operation (trip) of any protection function SO2 (X100:13-15) • operation (trip) of any stage of the overcurrent protection function SO2 (X110:17-19) • operation (trip) of any stage of the earth-fault protection function SO3 (X110:20-22). The two TPGAPC blocks 1 and 2 are timers and used for setting the minimum pulse length for the outputs. There are four generic timers (TPGAPC1..4) available in the IED. The remaining ones not described in the functional diagram are available in SMT for connection where applicable. 1MRS756378 D Section 3 REF615 variants REF615 57 Application Manual

earth-fault protection 3.5.1 Applications The standard configuration for non-directional earth-fault protection is mainly intended for cable and overhead line feeder applications in directly or resistance earthed distribution networks. The IED with this standard configuration is delivered from the factory with default settings and parameters. The end-user flexibility for incoming, outgoing and internal signal designation within the IED enables this configuration to be further adapted to different primary circuit layouts and the related functionality needs by modifying the internal functionality with SMT and PST. 3.5.2 Functions Table 13: Functions included in the REF615 standard configuration with non-directional earth- fault protection Function IEC 61850 IEC ANSI Three-phase non-directional overcurrent protection, low stage PHLPTOC1 3I> 51P-1 Three-phase non-directional overcurrent protection, high stage, instance 1 PHHPTOC1 3I>> (1) 51P-2 (1) Three-phase non-directional overcurrent protection, high stage, instance 2 PHHPTOC2 3I>> (2) 51P-2 (2) Three-phase non-directional overcurrent protection, instantaneous stage PHIPTOC1 3I>>> 50P/51P Arc protection ARCSARC1 ARCSARC2 ARCSARC3 ARC (1) ARC (2) ARC (3) 50L/50NL (1) 50L/50NL (2) 50L/50NL (3) Non-directional earth-fault protection, low stage EFLPTOC1 I0> (1) 51N-1 (1) Non-directional earth-fault protection, low stage (Non-directional sensitive earth-fault) EFLPTOC2 I0> (2) 51N-1 (2) Non-directional earth-fault protection, high stage EFHPTOC1 I0>> 51N-2 Non-directional earth-fault protection, instantaneous stage EFIPTOC1 I0>>> 50N/51N Negative-sequence overcurrent protection, instance 1 NSPTOC1 I2> (1) 46 (1) Negative-sequence overcurrent protection, instance 2 NSPTOC2 I2> (2) 46 (2) Phase discontinuity PDNSPTOC1 I2/I1> 46PD Three-phase inrush detector INRPHAR1 3I2f> 68 Three-phase thermal protection for feeders, cables and distribution transformers T1PTTR1 3Ith> 49F Autoreclosure DARREC1 O → I 79 Circuit breaker failure protection CCBRBRF1 3I>/I0>BF 51BF/51NBF Table continues on next page Section 3 1MRS756378 D REF615 variants 58 REF615 Application Manual

Master Trip (2) 94/86 (1) 94/86 (2) Trip circuit supervision, instance 1 TCSSCBR1 TCS (1) TCM (1) Trip circuit supervision, instance 2 TCSSCBR2 TCS (2) TCM (2) Disturbance recorder RDRE1 - - Three-phase current measurement CMMXU1 3I 3I Sequence current measurement CSMSQI1 I1, I2, I0 I1, I2, I0 Residual current measurement RESCMMXU1 I0 In 3.5.2.1 Default I/O connections Binary Input Default usage Connector-Pins X120-BI1 Blocking of Overcurrent Instantaneous Stage X120-1,2 X120-BI2 Circuit Breaker Closed indication X120-3,2 X120-BI3 Circuit Breaker Open indication X120-4,2 X120-BI4 Reset of Master Trip Lockout X120-5,6 Binary Output Default usage Connector-Pins X100-PO1 Close Circuit Breaker X100-6,7 X100-PO2 Circuit Breaker Failure protection trip to upstream breaker X100-8,9 X100-PO3 Open Circuit Breaker / trip coil 1 X100-16,17,18,19 X100-PO4 Open Circuit Breaker / trip coil 2 X100-20,21,22,23 X100-SO1 General Start Indication X100-10,11,12 X100-SO2 General Operate Indication X100-13,14,15 LED Default usage 1 Non-Directional Overcurrent Operate 2 Non-Directional Earth fault Operate 3 Sensitive Earth fault Operate 4 Negative Seq. Overcurrent/Phase Discontinuity Operate 5 Thermal Overload Alarm 6 Breaker Failure Operate 7 Disturbance Recorder Triggered 8 Not connected 9 Trip Circuit Supervision Alarm 10 ARC Protection Operate 11 Auto Reclose in Progress 1MRS756378 D Section 3 REF615 variants REF615 59 Application Manual

to-function connections. The default connections can be viewed with SMT and changed according to the application requirements, if necessary. The analog channels, measurements from CTs and VTs, have fixed connections towards the different function blocks inside the IED’s standard configuration. Exceptions from this rule are the 12 analog channels available for the disturbance recorder function. These channels are freely selectable and a part of the disturbance recorder’s parameter settings, thus not included in the SMT functionality. The analog channels are assigned to different functions as shown in the functional diagrams. The common signal marked with 3I represents the three phase currents. The signal marked with I0 represents the measured residual current via a summation connection of the phase current transformers. 3.5.3.1 Functional diagrams for protection The following functional diagrams describe the IED’s protection functionality in detail and according to the factory set default connections in SMT. Section 3 1MRS756378 D REF615 variants 60 REF615 Application Manual

Figure 25: Overcurrent protection Four overcurrent stages are offered for overcurrent and short-circuit protection. The instantaneous stage (PHIPTOC1) can be blocked by energizing the binary input 1 (X120:1-2). Two negative sequence overcurrent stages (NPSTOC1 and NPSTOC2) are offered for phase unbalance protection. The inrush detection block’s (INRPHAR1) output BLK2H caters the possibility to either block the function or multiply the active settings for any of the shown protection function blocks. All operate signals are connected to the Master Trip and also to the alarm LEDs. LED 1 is used for overcurrent and LED 4 for negative sequence overcurrent protection operate indication. LED 4 is also used for phase discontinuity protection operate indication. There are four IED variant specific setting groups. Parameters can be set independently for each setting group. The active setting group (1...4) can be changed with a parameter. The change of an active setting group can also be made via a binary input if the binary input is enabled 1MRS756378 D Section 3 REF615 variants REF615 61 Application Manual

a free binary input with SMT to the ActSG input of the SGCB-block. Table 14: Binary input states and corresponding active setting groups BI State Active setting group OFF 1 ON 2 The active setting group defined by a parameter is overridden when a binary input is enabled for changing the active setting group. LED2 (EF OPERATE) OR EARTH FAULT PROTECTION SENSITIVE EARTH FAULT PROTECTION LED3 (SEF OPERATE) I > EFLPTOC1 START OPERATE I0 BLOCK ENA_MULT 51N-1 0 I > EFLPTOC2 START OPERATE I0 BLOCK ENA_MULT 51N-1 0 I >> EFHPTOC1 START OPERATE I0 BLOCK ENA_MULT 51N-2 0 I >>> EFIPTOC1 START OPERATE I0 BLOCK ENA_MULT 50N 0 A071350 V4 EN Figure 26: Non-directional earth-fault protection Four stages are offered for non-directional earth-fault protection. One stage is dedicated to sensitive earth-fault protection. All operate signals are connected to the Master Trip and also to the alarm LEDs. LED 2 is used for directional earth-fault and LED 3 for the sensitive earth-fault protection operate indication. Section 3 1MRS756378 D REF615 variants 62 REF615 Application Manual

Figure 27: Phase discontinuity, thermal overload and circuit breaker failure protection The phase discontinuity protection (PDNSPTOC1) provides protection for interruptions in the normal three-phase load supply, for example, in downed conductor situations. The thermal overload protection (T1PTTR1) provides indication on overload situations. The operate signal of the phase discontinuity protection is connected to the Master Trip and also to an alarm LED. LED 4 is used for the phase discontinuity protection operate indication, the same as for negative sequence overcurrent protection operate indication, and LED 5 is used for the thermal overload protection alarm indication. The breaker failure protection (CCBRBRF1) is initiated via the start input by a number of different protection stages in the IED. The breaker failure protection function offers different operating modes associated with the circuit breaker position and the measured phase and residual currents. The breaker failure protection has two operating outputs: TRRET and TRBU. The TRRET operate output is used for re- tripping its own breaker through the Master Trip 2. The TRBU output is used to give a back-up trip to the breaker feeding upstream. For this purpose, the TRBU operate output signal is connected to the output PO2 (X100: 8-9). LED 6 is used for back-up (TRBU) operate indication. 1MRS756378 D Section 3 REF615 variants REF615 63 Application Manual

Figure 28: Arc protection ARC protection (ARCSARC1...3) and autoreclosing (DARREC1) are included as optional functions. The ARC protection offers individual function blocks for three ARC sensors that can be connected to the IED. Each ARC protection function block has two different operation modes, with or without the phase and residual current check. Operate signals from the ARC protection function blocks are connected to the Master Trip and also to the alarm LED 10 as a common operate indication. The autorecloser is configured to be initiated by operate signals from a number of protection stages through the INIT1-5 inputs. It is possible to create individual autoreclosing sequences for each input. The autoreclosing function can be blocked with the INHIBIT_RECL input. As a default, the operation of some selected protection functions are connected to this Section 3 1MRS756378 D REF615 variants 64 REF615 Application Manual

the autoreclose function via the CBXCBR-selected signal. The circuit breaker availability for the autoreclosure sequence is expressed with the CB_RDY input in DARREC1. In the configuration, this signal is not connected to any of the binary inputs. As a result, the function assumes that the breaker is available all the time. The autoreclose sequence in progress indication is connected to the alarm LED 11. 3.5.3.2 Functional diagram for disturbance recorder and trip circuit supervision PHLPTOC1-start PHHPTOC1-start PHHPTOC2-start PHIPTOC1-start NSPTOC1-start NSPTOC2-start EFLPTOC1-start EFHPTOC1-start EFIPTOC1-start EFLPTOC2-start PDNSPTOC1-start T1PTTR1-start CCRBRF1-trret CCRBRF1-trbu OR PHLPTOC1-operate PHHPTOC1-operate PHHPTOC2-operate PHIPTOC1-operate LED7 (DR TRIGGERED) OR OR EFLPTOC2-operate PDNSPTOC1-operate INRPHAR1-blk2h T1PTTR1-operate OR ARCSARC1-operate ARCSARC2-operate ARCSARC3-operate DARREC1-inpro OR NSPTOC1-operate NSPTOC2-operate ARCSARC1-fault_arc_det ARCSARC2-fault_arc_det ARCSARC3-fault_arc_det EFLPTOC11-operate EFHPTOC1-operate EFIPTOC1-operate DARREC1-close cb DARREC1-unsuc_recl BI 1(Blocking) BI 2 (CB Closed) BI 3 (CB Open) DISTURBANCE RECORDER TCSSCBR1 ALARM BLOCK TCSSCBR2 ALARM BLOCK OR OR TRPPTRC1- trip TRPPTRC2- trip LED9 (TCS ALARM) TRIP CIRCUIT SUPERVISION RDRE1 TRIGGERED BI#1 BI#2 BI#3 BI#4 BI#5 BI#6 BI#7 BI#8 BI#9 BI#10 BI#11 BI#12 BI#13 BI#14 BI#15 BI#16 BI#17 BI#18 BI#19 BI#20 BI#21 BI#22 BI#23 BI#24 BI#25 BI#26 BI#27 BI#28 BI#29 BI#30 BI#31 BI#32 A071356 V3 EN Figure 29: Disturbance recorder The disturbance recorder has 64 digital inputs, of which 32 are connected as default. All start and operate signals from the protection stages are routed to trigger the disturbance recorder or alternatively only to be recorded by the disturbance recorder depending on the parameter settings. Additionally, the selected autorecloser, the ARC protection signals and the three binary inputs from X120 are also connected. Two separate TCS functions are included: TCSSCBR1 for PO3 (X100:16-19) and TCSSCBR2 for PO4 (X100:20-23). Both functions are blocked by the Master Trip 1MRS756378 D Section 3 REF615 variants REF615 65 Application Manual

alarm indication is connected to LED 9. 3.5.3.3 Functional diagrams for control and interlocking A071358 V4 EN Figure 30: Master trip The operate signals from the protections described above are connected to both of the two trip output contacts PO3 (X100:16-19) and PO4 (X100:20-23) via the corresponding Master Trips TRPPTRC1 and TRPPTRC2. The open control commands to the circuit breaker from local or remote CBXCBR1-exe_op or from the auto-recloser DARREC1-open_cb are connected directly to the output PO3 (X100:16-19). The TRPPTRC1 and 2 blocks provide the lockout/latching function, event generation and the trip signal duration setting. In case the lockout operation mode is selected, the binary input 4 (X120:5-6) is assigned to the RST_LKOUT input of the Master Trip to enable external reset with a push button. Section 3 1MRS756378 D REF615 variants 66 REF615 Application Manual

Figure 31: Circuit breaker control The ENA_CLOSE input, that is, enable the closing of the circuit breaker, in the breaker control function block CBXCBR is a combination of the status of the Master Trip. The open operation is always enabled. If the ENA_CLOSE signal is completely removed from the breaker control function block CBXCBR with SMT, the function assumes that the breaker close commands are allowed continuously. A071362 V3 EN Figure 32: Alarm indication The signal outputs from the IED have been connected to give dedicated information on: • start of any protection function SO1 (X100:10-12) • operation (trip) of any protection function SO2 (X100:13-14). 1MRS756378 D Section 3 REF615 variants REF615 67 Application Manual

length for the outputs. There are four generic timers (TPGAPC1..4) available in the IED. The remaining ones not described in the functional diagram are available in SMT for connection where applicable. 3.6 Standard configuration D including non-directional earth-fault protection and CB condition monitoring 3.6.1 Applications The standard configuration for non-directional earth-fault protection is mainly intended for cable and overhead line feeder applications in directly or resistance earthed distribution networks. The IED with this standard configuration is delivered from the factory with default settings and parameters. The end-user flexibility for incoming, outgoing and internal signal designation within the IED enables this configuration to be further adapted to different primary circuit layouts and the related functionality needs by modifying the internal functionality with SMT and PST. 3.6.2 Functions Table 15: Functions included in the REF615 standard configuration with non-directional earth- fault protection Function IEC 61850 IEC ANSI Three-phase non-directional overcurrent protection, low stage PHLPTOC1 3I> 51P-1 Three-phase non-directional overcurrent protection, high stage, instance 1 PHHPTOC1 3I>> (1) 51P-2 (1) Three-phase non-directional overcurrent protection, high stage, instance 2 PHHPTOC2 3I>> (2) 51P-2 (2) Three-phase non-directional overcurrent protection, instantaneous stage PHIPTOC1 3I>>> 50P/51P Arc protection ARCSARC1 ARCSARC2 ARCSARC3 ARC (1) ARC (2) ARC (3) 50L/50NL (1) 50L/50NL (2) 50L/50NL (3) Non-directional earth-fault protection, low stage EFLPTOC1 I0> (1) 51N-1 (1) Non-directional earth-fault protection, low stage (Non-directional sensitive earth-fault) EFLPTOC2 I0> (2) 51N-1 (2) Non-directional earth-fault protection, high stage EFHPTOC1 I0>> 51N-2 Non-directional earth-fault protection, instantaneous stage EFIPTOC1 I0>>> 50N/51N Negative-sequence overcurrent protection, instance 1 NSPTOC1 I2> (1) 46 (1) Negative-sequence overcurrent protection, instance 2 NSPTOC2 I2> (2) 46 (2) Phase discontinuity PDNSPTOC1 I2/I1> 46PD Table continues on next page Section 3 1MRS756378 D REF615 variants 68 REF615 Application Manual

INRPHAR1 3I2f> 68 Three-phase thermal protection for feeders, cables and distribution transformers T1PTTR1 3Ith> 49F Autoreclosure DARREC1 O → I 79 Circuit breaker failure protection CCBRBRF1 3I>/I0>BF 51BF/51NBF Master trip TRPPTRC1 TRPPTRC2 Master Trip (1) Master Trip (2) 94/86 (1) 94/86 (2) Trip circuit supervision, instance 1 TCSSCBR1 TCS (1) TCM (1) Trip circuit supervision, instance 2 TCSSCBR2 TCS (2) TCM (2) Disturbance recorder RDRE1 - - Circuit breaker condition monitoring SSCBR1 CBCM CBCM Three-phase current measurement CMMXU1 3I 3I Sequence current measurement CSMSQI1 I1, I2, I0 I1, I2, I0 Residual current measurement RESCMMXU1 I0 In 3.6.2.1 Default I/O connections Binary Input Default usage Connector-Pins X110-BI2 Auto Reclose External Start Command X110-3,4 X110-BI3 Circuit Breaker low Gas Pressure indication X110-5,6 X110-BI4 Circuit Breaker Spring Charged indication X110-6,7 X110-BI5 CB Truck in (Service position) indication X110-8,9 X110-BI6 CB Truck out (Test position) indication X110-10,9 X110-BI7 Earthing Switch Closed indication X110-11,12 X110-BI8 Earthing Switch Open indication X110-13,12 X120-BI1 Blocking of Overcurrent Instantaneous Stage X120-1,2 X120-BI2 Circuit Breaker Closed indication X120-3,2 X120-BI3 Circuit Breaker Open indication X120-4,2 X120-BI4 Reset of Master Trip Lockout X120-5,6 Binary Output Default usage Connector-Pins X100-PO1 Close Circuit Breaker X100-6,7 X100-PO2 Circuit Breaker Failure protection trip to upstream breaker X100-8,9 X100-PO3 Open Circuit Breaker / trip coil 1 X100-16,17,18,19 X100-PO4 Open Circuit Breaker / trip coil 2 X100-20,21,22,23 X100-SO1 General Start Indication X100-10,11,12 X100-SO2 General Operate Indication X100-13,14,15 X110-SO1 Upstream Overcurrent Blocking X110-14,15,16 X110-SO2 Overcurrent Operate Alarm X110-17,18,19 X110-SO3 Earth fault Operate Alarm X110-20,21,22 1MRS756378 D Section 3 REF615 variants REF615 69 Application Manual

2 Non-Directional Earth fault Operate 3 Sensitive Earth fault Operate 4 Negative Seq. Overcurrent/Phase Discontinuity Operate 5 Thermal Overload Alarm 6 Breaker Failure Operate 7 Disturbance Recorder Triggered 8 Circuit Breaker Condition Monitoring Alarm 9 Trip Circuit Supervision Alarm 10 ARC Protection Operate 11 Auto Reclose in Progress 3.6.3 Functional diagrams The functional diagrams describe the default input, output, alarm LED and function- to-function connections. The default connections can be viewed with SMT and changed according to the application requirements, if necessary. The analog channels, measurements from CTs and VTs, have fixed connections towards the different function blocks inside the IED’s standard configuration. Exceptions from this rule are the 12 analog channels available for the disturbance recorder function. These channels are freely selectable and a part of the disturbance recorder’s parameter settings, thus not included in the SMT functionality. The analog channels are assigned to different functions as shown in the functional diagrams. The common signal marked with 3I represents the three phase currents. The signal marked with I0 represents the measured residual current, via a summation connection of the phase current transformers. 3.6.3.1 Functional diagrams for protection The following functional diagrams describe the IED’s protection functionality in detail and according to the factory set default connections in SMT. Section 3 1MRS756378 D REF615 variants 70 REF615 Application Manual

Figure 33: Overcurrent protection Four overcurrent stages are offered for overcurrent and short-circuit protection. The instantaneous stage (PHIPTOC1) can be blocked by energizing the binary input 1 (X120:1-2). Two negative sequence overcurrent stages (NPSTOC1 and NPSTOC2) are offered for phase unbalance protection. The inrush detection block’s (INRPHAR1) output BLK2H caters the possibility to either block the function or multiply the active settings for any of the shown protection function blocks. All operate signals are connected to the Master Trip and also to the alarm LEDs. LED 1 is used for overcurrent and LED 4 for negative sequence overcurrent protection operate indication. LED 4 is also used for phase discontinuity protection operate indication. The upstream blocking from the start of the overcurrent second high stage (PHHPTOC2) is connected to the output SO1 (X110:14-16). This output is used for sending a blocking signal to the relevant overcurrent protection stage of the IED at the infeeding bay. There are four IED variant specific setting groups. Parameters can be set independently for each setting group. 1MRS756378 D Section 3 REF615 variants REF615 71 Application Manual

active setting group can also be made via a binary input if the binary input is enabled for this. To enable the change of an active setting group via a binary input, connect a free binary input with SMT to the ActSG input of the SGCB-block. Table 16: Binary input states and corresponding active setting groups BI State Active setting group OFF 1 ON 2 The active setting group defined by a parameter is overridden when a binary input is enabled for changing the active setting group. LED2 (EF OPERATE) OR EARTH FAULT PROTECTION SENSITIVE EARTH FAULT PROTECTION LED3 (SEF OPERATE) I > EFLPTOC1 START OPERATE I0 BLOCK ENA_MULT 51N-1 0 I > EFLPTOC2 START OPERATE I0 BLOCK ENA_MULT 51N-1 0 I >> EFHPTOC1 START OPERATE I0 BLOCK ENA_MULT 51N-2 0 I >>> EFIPTOC1 START OPERATE I0 BLOCK ENA_MULT 50N 0 A071350 V4 EN Figure 34: Non-directional earth-fault protection Four stages are offered for non-directional earth-fault protection. One stage is dedicated to sensitive earth-fault protection. All operate signals are connected to the Master Trip and also to the alarm LEDs. LED 2 is used for directional earth-fault and LED 3 for the sensitive earth-fault protection operate indication. Section 3 1MRS756378 D REF615 variants 72 REF615 Application Manual

Figure 35: Phase discontinuity, thermal overload and circuit breaker failure protection The phase discontinuity protection (PDNSPTOC1) provides protection for interruptions in the normal three-phase load supply, for example, in downed conductor situations. The thermal overload protection (T1PTTR1) provides indication on overload situations. The operate signal of the phase discontinuity protection is connected to the Master Trip and also to the alarm LEDs. LED 4 is used for the phase discontinuity protection operate indication, the same as for negative sequence overcurrent protection operate indication, and LED 5 is used for the thermal overload protection alarm indication. The breaker failure protection (CCBRBRF1) is initiated via the start input by a number of different protection stages in the IED. The breaker failure protection function offers different operating modes associated with the circuit breaker position and the measured phase and residual currents. The breaker failure protection has two operating outputs: TRRET and TRBU. The TRRET operate output is used for re- tripping its own breaker through the Master Trip 2. The TRBU output is used to give a back-up trip to the breaker feeding upstream. For this purpose, the TRBU operate output signal is connected to the output PO2 (X100: 8-9). LED 6 is used for back-up (TRBU) operate indication. 1MRS756378 D Section 3 REF615 variants REF615 73 Application Manual

Figure 36: Arc protection ARC protection (ARCSARC1-3) and autoreclosing (DARREC1) are included as optional functions. The ARC protection offers individual function blocks for three ARC sensors that can be connected to the IED. Each ARC protection function block has two different operation modes, with or without the phase and residual current check. Operate signals from the ARC protection function blocks are connected to the Master Trip and also to the alarm LED 10 as a common operate indication. The autorecloser is configured to be initiated by operate signals from a number of protection stages through the INIT1-5 inputs. The INIT6 input in the autorecloser function block is controlled by a binary input 2 (X110:3-4) enabling the use of the Section 3 1MRS756378 D REF615 variants 74 REF615 Application Manual

each input. The autoreclose function can be blocked with the INHIBIT_RECL input. As a default, the operation of some selected protection functions are connected to this input. A control command to the circuit breaker, either local or remote, also blocks the autoreclose function via the CBXCBR-selected signal. The circuit breaker availability for the autoreclosure sequence is expressed with the binary input 4 (X110:6-7) by connecting the input signal to the CB_RDY input. In case this signal is completely removed from the autoreclose function block with SMT, the function assumes that the breaker is available all the time. The autoreclose sequence in progress indication is connected to the alarm LED 11. 3.6.3.2 Functional diagram for disturbance recorder and trip circuit supervision PHLPTOC1-start PHHPTOC1-start PHHPTOC2-start PHIPTOC1-start NSPTOC1-start NSPTOC2-start EFLPTOC1-start EFHPTOC1-start EFIPTOC1-start EFLPTOC2-start PDNSPTOC1-start T1PTTR1-start CCRBRF1-trret CCRBRF1-trbu OR PHLPTOC1-operate PHHPTOC1-operate PHHPTOC2-operate PHIPTOC1-operate LED7 (DR TRIGGERED) OR OR EFLPTOC2-operate PDNSPTOC1-operate INRPHAR1-blk2h T1PTTR1-operate OR ARCSARC1-operate ARCSARC2-operate ARCSARC3-operate DARREC1-inpro OR NSPTOC1-operate NSPTOC2-operate ARCSARC1-fault_arc_det ARCSARC2-fault_arc_det ARCSARC3-fault_arc_det EFLPTOC11-operate EFHPTOC1-operate EFIPTOC1-operate DARREC1-close cb DARREC1-unsuc_recl BI 1(Blocking) BI 2 (CB Closed) BI 3 (CB Open) DISTURBANCE RECORDER TCSSCBR1 ALARM BLOCK TCSSCBR2 ALARM BLOCK OR OR TRPPTRC1- trip TRPPTRC2- trip LED9 (TCS ALARM) TRIP CIRCUIT SUPERVISION RDRE1 TRIGGERED BI#1 BI#2 BI#3 BI#4 BI#5 BI#6 BI#7 BI#8 BI#9 BI#10 BI#11 BI#12 BI#13 BI#14 BI#15 BI#16 BI#17 BI#18 BI#19 BI#20 BI#21 BI#22 BI#23 BI#24 BI#25 BI#26 BI#27 BI#28 BI#29 BI#30 BI#31 BI#32 X110 3 4 BI 2 (AR ext. start) A071372 V4 EN Figure 37: Disturbance recorder The disturbance recorder has 64 digital inputs, of which 32 are connected as default. All start and operate signals from the protection stages are routed to trigger the disturbance recorder or alternatively only to be recorded by the disturbance recorder depending on the parameter settings. Additionally, the selected autorecloser, the ARC 1MRS756378 D Section 3 REF615 variants REF615 75 Application Manual

as the autorecloser external start command from the binary input 2 (X110:3-4). Two separate TCS functions are included: TCSSCBR1 for PO3 (X100:16-19) and TCSSCBR2 for PO4 (X100:20-23). Both functions are blocked by the Master Trip (TRPPTRC1 and TRPPTRC2) and the circuit breaker open position signal. The TCS alarm indication is connected to LED 9. 3.6.3.3 Functional diagrams for control and interlocking A071358 V4 EN Figure 38: Master trip The operate signals from the protections described above are connected to the two trip output contacts PO3 (X100:16-19) and PO4 (X100:20-23) via the corresponding Master Trips TRPPTRC1 and TRPPTRC2. The open control commands to the circuit breaker from local or remote CBXCBR1-exe_op or from the auto-recloser DARREC1-open_cb are connected directly to the output PO3 (X100:16-19). The TRPPTRC1 and 2 blocks provide the lockout/latching function, event generation and the trip signal duration setting. If the lockout operation mode is selected, the binary input 4 (X120:5-6) is assigned to the RST_LKOUT input of the Master Trip to enable external reset with a push button. Section 3 1MRS756378 D REF615 variants 76 REF615 Application Manual

Figure 39: Circuit breaker control There are three disconnector status blocks (DCSXSWI1…3) available in the IED. The remaining two not described in the functional diagram are available in SMT for connection where applicable. The binary inputs 5 and 6 of the additional card X110 are used for busbar disconnector (DCSXSWI1) or circuit breaker truck position indication. Primary device position Input to be energized Input 5 (X110:8-9) Input 6 (X110:10-9) Busbar disconnector closed X Busbar disconnector open X CB truck in service position X CB truck in test position X The binary inputs 7 and 8 (X110:11-13) are for the position indication of the line side earthing switch. The circuit breaker closing is enabled when the ENA_CLOSE input is activated. This can be done by the configuration logic, which is a combination of the disconnector or breaker truck and earthing switch position statuses and the statuses of the master 1MRS756378 D Section 3 REF615 variants REF615 77 Application Manual

output from the DCSXSWI block defines if the disconnector or breaker truck is definitely either open/in test position or close/in service position. This, together with the open earthing switch and non-active trip signals, activates the close-enable signal to the circuit breaker control function block. The open operation is always enabled. The auto-recloser close command signals are directly connected to the output contact PO1 (X100:6-7). If the ENA_CLOSE signal is completely removed from the breaker control function block CBXCBR with SMT, the function assumes that the breaker close commands are allowed continuously. The ITL_BYPASS input can be used, for example, to always enable the closing of the circuit breaker when the circuit breaker truck is out in the test position, despite of the interlocking conditions being active when the circuit breaker truck is closed in service position. The circuit breaker condition monitoring function (SSCBR) supervises the circuit breaker status based on the binary input information connected and measured current levels. The function introduces various supervision methods. The corresponding supervision alarm signals are routed to LED 8. Section 3 1MRS756378 D REF615 variants 78 REF615 Application Manual

Figure 40: Alarm indication The signal outputs from the IED are connected to give dedicated information on: • start of any protection function SO1 (X100:10-12) • operation (trip) of any protection function SO2 (X100:13-14) • operation (trip) of any stage of the overcurrent protection function SO2 (X110:17-19) • operation (trip) of any stage of the earth fault protection function SO3 (X110:20-22). The two TPGAPC blocks 1 and 2 are timers and used for setting the minimum pulse length for the outputs. There are four generic timers (TPGAPC1..4) available in the IED. The remaining ones not described in the functional diagram are available in SMT for connection where applicable. 1MRS756378 D Section 3 REF615 variants REF615 79 Application Manual

fault protection with phase-voltage measurement 3.7.1 Applications The standard configuration for directional earth-fault protection is mainly intended for cable and overhead line feeder applications in isolated and resonant-earthed distribution networks. The IED with this standard configuration is delivered from the factory with default settings and parameters. The end-user flexibility for incoming, outgoing and internal signal designation within the IED enables this configuration to be further adapted to different primary circuit layouts and the related functionality needs by modifying the internal functionality using PCM600. 3.7.2 Functions Table 17: Functions included in the REF615 standard configuration including directional earth- fault protection with phase voltage measurement Function IEC 61850 IEC ANSI Three-phase non-directional overcurrent protection, low stage PHLPTOC1 3I> 51P-1 Three-phase non-directional overcurrent protection, high stage, instance 1 PHHPTOC1 3I>> (1) 51P-2 (1) Three-phase non-directional overcurrent protection, high stage, instance 2 PHHPTOC2 3I>> (2) 51P-2 (2) Three-phase non-directional overcurrent protection, instantaneous stage PHIPTOC1 3I>>> 50P/51P Arc protection ARCSARC1 ARCSARC2 ARCSARC3 ARC (1) ARC (2) ARC (3) 50L/50NL (1) 50L/50NL (2) 50L/50NL (3) Directional earth-fault protection, low stage, instance 1 DEFLPDEF1 I0> → (1) 67N-1 (1) Directional earth-fault protection, low stage, instance 2 DEFLPDEF2 I0> → (2) 67N-1 (2) Directional earth-fault protection, high stage DEFHPDEF1 I0>> → 67N-2 Transient/intermittent earth-fault protection INTRPTEF1 I0> → IEF 67NIEF Non-directional earth-fault protection, high stage, calculated I0 current (Double earth-fault protection) EFHPTOC1 I0>> 51N-2 Negative-sequence overcurrent protection, instance 1 NSPTOC1 I2> (1) 46 (1) Negative-sequence overcurrent protection, instance 2 NSPTOC2 I2> (2) 46 (2) Phase discontinuity PDNSPTOC1 I2/I1> 46PD Three-phase inrush detector INRPHAR1 3I2f> 68 Three-phase thermal protection for feeders, cables and distribution transformers T1PTTR1 3Ith> 49F Table continues on next page Section 3 1MRS756378 D REF615 variants 80 REF615 Application Manual

79 Circuit breaker failure protection CCBRBRF1 3I>/I0>BF 51BF/51NBF Master Trip TRPPTRC1 TRPPTRC2 Master trip (1) Master trip (2) 94/86 (1) 94/86 (2) Trip circuit supervision, instance 1 TCSSCBR1 TCS (1) TCM (1) Trip circuit supervision, instance 2 TCSSCBR2 TCS (2) TCM (2) Disturbance recorder RDRE1 - - Circuit breaker condition monitoring SSCBR1 CBCM CBCM Three-phase current measurement CMMXU1 3I 3I Sequence current measurement CSMSQI1 I1, I2, I0 I1, I2, I0 Residual current measurement RESCMMXU1 I0 In Residual voltage measurement RESVMMXU1 U0 Vn Three-phase voltage measurement VMMXU1 3U 3U Voltage sequence components measurement VSMSQI1 U1, U2, U0 U1, U2, U0 Power and energy measurement PEMMXU1 P, E P, E 3.7.2.1 Default I/O connections Binary input Default usage Connector pins X110-BI1 MCB open X110-1,2 X110-BI2 Directional Earth Fault Protection's Basic Angle Control X110-3,4 X110-BI3 Circuit breaker low gas pressure alarm X110-5,6 X110-BI4 CB spring charged indication X110-7,6 X110-BI5 CB Truck in (Service position) indication X110-8,9 X110-BI6 CB Truck out (Test position) indication X110-10,9 X110-BI7 Earthing switch closed indication X110-11,12 X110-BI8 Earthing switch open indication X110-13,12 X120-BI1 Blocking of overcurrent instantaneous stage X120-1,2 X120-BI2 Circuit Breaker Closed indication X120-3,2 X120-BI3 Circuit Breaker Open indication X120-4,2 X120-BI4 Lock-out reset X120-5,6 Binary output Default usage Connector pins X100-PO1 Close circuit breaker X100-6,7 X100-PO2 Breaker failure backup trip to upstream breaker X100-8,9 X100-SO1 General Start indication X100-10,11,(12) X100-SO2 General Operate indication X100-13,14 X100-PO3 Open Circuit Breaker/trip coil 1 X100-15-19 Table continues on next page 1MRS756378 D Section 3 REF615 variants REF615 81 Application Manual

X100-20-24 X110-SO1 Upstream Overcurrent Blocking X110-14,15 X110-SO2 Over current operate Alarm X110-17,18 X110-SO3 Earth fault operate Alarm X110-20,21 LED Default usage 1 Non-directional overcurrent protection operated 2 Directional earth-fault protection operated 3 Non-directional earth-fault protection operated 4 Negative-sequence overcurrent or phase discontinuity protection operated 5 Thermal overload protection operated 6 Circuit-breaker failure protection backup protection operated 7 Disturbance recorder triggered 8 Circuit-breaker condition monitoring alarm 9 Supervision alarm 10 Arc fault detected 11 Autoreclose in progress 3.7.3 Functional diagrams The functional diagrams describe the default input, output, alarm LED and function- to-function connections. The default connections can be viewed with SMT and changed according to the application requirements, if necessary. The analog channels, measurements from CTs and VTs, have fixed connections towards the different function blocks inside the IED’s standard configuration. Exceptions from this rule are the 12 analog channels available for the disturbance recorder function. These channels are freely selectable and a part of the disturbance recorder’s parameter settings, thus not included in the SMT functionality. The analog channels are assigned to different functions as shown in the functional diagrams. The common signal marked with 3I represents the three phase currents. The signal marked with I0 represents the measured residual current via a core balance CT. The signal marked with U0 represents the measured residual voltage via open delta connected VTs. The EFHPTOC protection function block for double (cross-country) earth-faults uses the calculated residual current originating from the measured phase currents. 3.7.3.1 Functional diagrams for protection The following functional diagrams describe the IED’s protection functionality in detail and according to the factory set default connections in SMT. Section 3 1MRS756378 D REF615 variants 82 REF615 Application Manual

instantaneous stage (PHIPTOC1) can be blocked by energizing the binary input 1 (X120:1-2). Two negative-sequence overcurrent stages (NSPTOC1 and NSPTOC2) are available for phase unbalance protection. The inrush detection block’s (INRPHAR1) output BLK2H enables either blocking the function or multiplying the active settings for any of the shown protection function blocks. GUID-37D627C4-6097-4322-BACC-161CC6039EC5 V1 EN Figure 41: Overcurrent protection and inrush indication All operate signals are connected to the Master Trip and also to the alarm LEDs. LED1 is used for overcurrent and LED 4 for negative sequence overcurrent protection operate indication. LED 4 is also used for phase discontinuity protection operate indication. The upstream blocking from the start of the overcurrent second high stage (PHHPTOC2) is connected to the output SO1 (X110:14-16). This output is used for sending a blocking signal to the relevant overcurrent protection stage of the IED at the infeeding bay. There are four IED variant specific setting groups. Parameters can be set independently for each setting group. The active setting group (1...4) can be changed with a parameter or via a binary input if the binary input is enabled for this. To enable the change of an active setting group 1MRS756378 D Section 3 REF615 variants REF615 83 Application Manual

SGCB-block. Table 18: Binary input states and corresponding active setting groups BI state Active setting group OFF 1 ON 2 The active setting group defined by a parameter is overridden when a binary input is enabled for changing the active setting group. Three stages are offered for directional earth-fault protection. In addition, there is a dedicated protection stage (INTRPTEF) either for transient based earth-fault protection or for cable intermittent earth-fault protection in compensated networks. A dedicated non-directional earth-fault protection block (EFHPTOC) is intended for protection against double earth-fault situations in isolated or compensated networks. This protection function uses the calculated residual current originating from the phase currents. The binary input 2 (X110:3-4) is intended for directional earth-fault protection blocks’ Relay Characteristic Angle (RCA: 0°/-90°) or operation mode (I0Sinφ/ I0Cosφ) change. All operate signals are connected to the Master Trip and also to the alarm LEDs. LED 2 is used for directional earth-fault and LED 3 for double earthfault protection operate indication. Section 3 1MRS756378 D REF615 variants 84 REF615 Application Manual

Figure 42: Earth-fault protection The phase discontinuity protection (PDNSPTOC1) provides protection for interruptions in the normal three-phase load supply, for example, in downed conductor situations. The thermal overload protection (T1PTTR1) provides indication on overload situations. The operate signal of the phase discontinuity protection is connected to the Master Trip and also to an alarm LED. LED 4 is used for the phase discontinuity protection operate indication, the same as for negative sequence overcurrent protection operate indication, and LED 5 is used for the thermal overload protection alarm indication. The breaker failure protection (CCBRBRF1) is initiated via the start input by a number of different protection stages in the IED. The breaker failure protection function offers different operating modes associated with the circuit breaker position and the measured phase and residual currents. The breaker failure protection has two operating outputs: TRRET and TRBU. The TRRET operate output is used for retripping its own breaker through the Master Trip 2. The TRBU output is used to give a back-up trip to the breaker feeding upstream. For this purpose, the TRBU operate output signal is connected to the output PO2 (X100: 8-9). LED 6 is used for back-up (TRBU) operate indication. 1MRS756378 D Section 3 REF615 variants REF615 85 Application Manual

Figure 43: Phase discontinuity, thermal overload and circuit breaker failure protection ARC protection (ARCSARC1...3) and autoreclosing (DARREC1) are included as optional functions. The ARC protection offers individual function blocks for three ARC sensors that can be connected to the IED. Each ARC protection function block has two different operation modes, with or without the phase and residual current check. Operate signals from the ARC protection function blocks are connected to the Master Trip and also to the alarm LED 10 as a common operate indication. Section 3 1MRS756378 D REF615 variants 86 REF615 Application Manual

Figure 44: Arc protection The autorecloser is configured to be initiated by operate signals from a number of protection stages through the INIT1-5 inputs. It is possible to create individual autoreclose sequences for each input. The autoreclose function can be blocked with the INHIBIT_RECL input. As a default, the operation of some selected protection functions are connected to this input. A control command to the circuit breaker, either local or remote, also blocks the autoreclose function via the CBXCBR-selected signal. The circuit breaker availability for the autoreclosure sequence is expressed with the binary input 4 (X110:6-7) by connecting the input signal to the CB_RDY input. In case this signal is completely removed from the autoreclose function block with SMT, the function assumes that the breaker is available all the time. 1MRS756378 D Section 3 REF615 variants REF615 87 Application Manual

3.7.3.2 Functional diagram for disturbance recorder and trip circuit supervision GUID-4BE45287-D708-41F3-851A-084A9AC3265E V1 EN Figure 45: Disturbance recorder The disturbance recorder has 64 digital inputs, of which 35 are connected as default. All start and operate signals from the protection stages are routed either to trigger the disturbance recorder or to be recorded by the disturbance recorder, depending on the parameter settings. Additionally, the selected autorecloser, the ARC protection signals and the three binary inputs from X120 are also connected. Two separate TCS functions are included: TCSSCBR1 for PO3 (X100:16-19) and TCSSCBR2 for PO4 (X100:20-23). Both functions are blocked by the Master Trip (TRPPTRC1 and TRPPTRC2) and the circuit breaker open position signal. The TCS alarm indication is connected to LED 9. Section 3 1MRS756378 D REF615 variants 88 REF615 Application Manual

measurement circuits. Failures, such as open miniature circuit breaker, are detected and the alarm is connected to the supervision alarm LED 9. Failures in current measuring circuits are detected by the current measuring circuit supervision function CCRDIF. When a failure is detected, the blocking signal is activated in current protection functions measuring calculated sequence component currents, and unnecessary operation can be avoided. The alarm signal is connected to supervision alarm LED 9. GUID-48DD2A49-CF29-4088-914B-7AE1629E18CA V1 EN Figure 46: Trip circuit supervision 3.7.3.3 Functional diagrams for control and interlocking The operate signals from the protections are connected to the two trip output contacts PO3 (X100:16-19) and PO4 (X100:20-23) via the corresponding Master Trips TRPPTRC1 and TRPPTRC2. Open control commands to the circuit breaker from local or remote CBXCBR1-exe_op or from the autorecloser DARREC1-open_cb are connected directly to the output PO3 (X100:16-19). 1MRS756378 D Section 3 REF615 variants REF615 89 Application Manual

Figure 47: Master trip The TRPPTRC1 and 2 blocks provide the lockout/latching function, event generation and the trip signal duration setting. If the lockout operation mode is selected, one binary input can be re-assigned to the RST_LKOUT input of the Master Trip to enable external reset with a push button. There are three disconnector status blocks (DCSXSWI1…3) available in the IED. The remaining two not described in the functional diagram are available in SMT for connection where applicable. Section 3 1MRS756378 D REF615 variants 90 REF615 Application Manual

Figure 48: Circuit breaker control The binary inputs 5 and 6 of the additional card X110 are used for busbar disconnector (DCSXSWI1) or circuit breaker truck position indication. Table 19: Device positions indicated by binary inputs 5 and 6 Primary device position Input to be energized Input 5 (X110:8-9) Input 6 (X110:10-9) Busbar disconnector closed X Busbar disconnector open X CB truck in service position X CB truck in test position X The binary inputs 7 and 8 (X110:11-13) are for the position indication of the line side earthing switch. The circuit breaker closing is enabled when the ENA_CLOSE input is activated. The input can be activated by the configuration logic, which is a combination of the disconnector or breaker truck and earthing switch position statuses and the statuses of the master trip logics and gas pressure alarm and circuit breaker spring charging. The OKPOS output from the DCSXSWI block defines if the disconnector or breaker truck is definitely either open/in test position or close/in service position. This, 1MRS756378 D Section 3 REF615 variants REF615 91 Application Manual

enable signal to the circuit breaker control function block. The open operation is always enabled. The autorecloser close command signals are directly connected to the output contact PO1 (X100:6-7). If the ENA_CLOSE signal is completely removed from the breaker control function block CBXCBR with SMT, the function assumes that the breaker close commands are allowed continuously. The ITL_BYPASS input can be used, for example, to always enable the closing of the circuit breaker when the circuit breaker truck is out in the test position, despite of the interlocking conditions being active when the circuit breaker truck is closed in service position. The circuit breaker condition monitoring function (SSCBR) supervises the circuit breaker status based on the binary input information connected and measured current levels. The function introduces various supervision methods. The corresponding supervision alarm signals are routed to LED 8. GUID-572DA8CC-7A7D-4F9F-87C5-272A4283FB3E V1 EN Figure 49: Alarm indication The signal outputs from the IED are connected to give dedicated information on: Section 3 1MRS756378 D REF615 variants 92 REF615 Application Manual

• Operation (trip) of any protection function SO2 (X100:13-14) • Operation (trip) of any stage of the overcurrent protection function SO2 (X110:17-19) • Operation (trip) of any stage of the earth-fault protection function SO3 (X110:20-22) The two TPGAPC blocks 1 and 2 are timers and used for setting the minimum pulse length for the outputs. There are four generic timers (TPGAPC1..4) available in the IED. The remaining ones not described in the functional diagram are available in SMT for connection where applicable. 3.8 Standard configuration F including directional overcurrent protection with voltage protection 3.8.1 Applications The standard configuration for directional overcurrent protection is mainly intended for cable and overhead line feeder applications in isolated and resonant-earthed distribution networks, where directional protections are necessary to improve the selectivity of the fault detection. The standard configuration includes phase voltage and residual voltage protection and measurement and also power and energy measurement. The IED with this standard configuration is delivered from the factory with default settings and parameters. The end-user flexibility for incoming, outgoing and internal signal designation within the IED enables this configuration to be further adapted to different primary circuit layouts and the related functionality needs by modifying the internal functionality with SMT and PST. 3.8.2 Functions Table 20: Functions included in the REF615 standard configuration including directional overcurrent protection with voltage protection Function IEC 61850 IEC ANSI Three-phase directional overcurrent protection, low stage, instance 1 DPHLPDOC1 3I> → (1) 67-1 (1) Three-phase directional overcurrent protection, low stage, instance 2 DPHLPDOC2 3I> → (2) 67-1 (2) Three-phase directional overcurrent protection, high stage DPHHPDOC1 3I>> → 67-2 Three-phase non-directional overcurrent protection, instantaneous stage PHIPTOC1 3I>>> 50P/51P Arc protection ARCSARC1 ARCSARC2 ARCSARC3 ARC (1) ARC (2) ARC (3) 50L/50NL (1) 50L/50NL (2) 50L/50NL (3) Table continues on next page 1MRS756378 D Section 3 REF615 variants REF615 93 Application Manual

instance 1 DEFLPDEF1 I0> → (1) 67N-1 (1) Directional earth-fault protection, low stage, instance 2 DEFLPDEF2 I0> → (2) 67N-1 (2) Directional earth-fault protection, high stage DEFHPDEF1 I0>> → 67N-2 Transient/intermittent earth-fault protection INTRPTEF1 I0> → IEF 67NIEF Non-directional earth-fault protection, high stage, calculated I0 current (Double earth-fault protection) EFHPTOC1 I0>> 51N-2 Negative-sequence overcurrent protection, instance 1 NSPTOC1 I2> (1) 46 (1) Negative-sequence overcurrent protection, instance 2 NSPTOC2 I2> (2) 46 (2) Phase discontinuity PDNSPTOC1 I2/I1> 46PD Three-phase inrush detector INRPHAR1 3I2f> 68 Three-phase undervoltage protection PHTUV1 PHTUV2 PHTUV3 3U< (1) 3U< (2) 3U< (3) 27 (1) 27 (2) 27 (3) Three-phase overvoltage protection PHTOV1 PHTOV2 PHTOV3 3U> (1) 3U> (2) 3U> (3) 59 (1) 59 (2) 59 (3) Residual overvoltage protection ROVPTOV1 ROVPTOV2 ROVPTOV3 U0> (1) U0> (2) U0> (3) 59G (1) 59G (2) 59G (3) Positive-sequence undervoltage protection PSPTUV U1< 47U+ Negative-sequence overvoltage protection NSPTOV U2> 47O- Three-phase thermal protection for feeders, cables and distribution transformers T1PTTR1 3Ith> 49F Autoreclosure DARREC1 O → I 79 Circuit breaker failure protection CCBRBRF1 3I>/I0>BF 51BF/51NBF Master Trip TRPPTRC1 TRPPTRC2 Master trip (1) Master trip (2) 94/86 (1) 94/86 (2) Trip circuit supervision, instance 1 TCSSCBR1 TCS (1) TCM (1) Trip circuit supervision, instance 2 TCSSCBR2 TCS (2) TCM (2) Disturbance recorder RDRE1 - - Circuit breaker condition monitoring SSCBR1 CBCM CBCM Three-phase current measurement CMMXU1 3I 3I Sequence current measurement CSMSQI1 I1, I2, I0 I1, I2, I0 Residual current measurement RESCMMXU1 I0 In Residual voltage measurement RESVMMXU1 U0 Vn Three-phase voltage measurement VMMXU1 3U 3U Voltage sequence components measurement VSMSQI1 U1, U2, U0 U1, U2, U0 Power and energy measurement PEMMXU1 P, E P, E Section 3 1MRS756378 D REF615 variants 94 REF615 Application Manual