Bender CMD420 Manuals

T M Document NAE1038810 • 01.2013 • © Bender Inc. • Page 1/1 • Side 1/2 Bender Inc. • USA: 800.356.4266 / 610.383.9200 / [email protected] • Canada: 800.243.2438 / 905.602.9990 / [email protected] • www.bender.org US k1 l1 k2 L2 l2 k3 L3 l3 A1 11 12 14 K1 K2 21 22 24 A2 k1 l1 k2 k3 A1 A2 l3 l2 CMD420 / CMD421 Installation Bulletin / Reference Guide This document is intended as a reference guide for installing and using BENDER CMD420 and CMD421 three-phase AC current relays. This document includes installation, setup, and usage instructions. For complete details, including installation, setup, settings, and troubleshooting, refer to the CMD420 / CMD421 user manual, document number TGH1459en. This document is intended as a supplement and not a replacement to the complete user manual. Only qualified maintenance personnel shall operate or service this equipment. These instructions should not be viewed as sufficient for those who are not otherwise qualified to operate or service this equipment. This document is intended to provide accurate information only. No responsibility is as- sumed by BENDER for any consequences arising from use of this document. Installation Mounting CMD420 / CMD421 series devices may be DIN rail mounted, or screw mounted using the black clips located on the top and bottom of the device. Screw mounting requires an extra black clip (article number B98060008, sold separately). ! DANGER • Disconnect all power before servicing. • Observe all local, state, and national codes, standards, and regulations. HAZARD OF ELECTRIC SHOCK, EXPLOSION, OR ARC FLASH Wiring - General Refer to figure 1 for wiring the CMD420 or CMD421. When using the CMD420, a current transformer with 1 A secondary (x/1 type) is required. For CMD421 de- vices, a current transformer with a 5 A secondary (x/5 type) is required. Use minimum AWG 24, maximum AWG 12 size wire. Refer to CMD420 / 421 series user manual for complete technical details. 1. External supply voltage; 5A fuse required for internal device pro- tection 2. Connection to individual phase conductors via current transform- ers. Use x/1 type (1 A secondary) for CMD420 and x/5 type (5 A sec- ondary) for CMD421. 3. Alarm relay K1: SPDT contact 4. Alarm relay K2: SPDT contact Figure 1 - Common wiring diagram for CMD420 and CMD421 Front Panel Display 1. LED “ON” (green): Illuminates when power is applied to the device. Flashes when the CT connection alarm is active. 2. LED “AL1” (yellow): Illuminates when the prealarm is activated. Flashes when the CT connection alarm is active. 3. LED “AL2” (yellow): Illuminates when the main alarm is activated. Flashes when the CT connection alarm is active. 4. Backlit LCD display 5. TEST / UP button: Activates self-test / scrolls up inside main menu. 6. RESET / DOWN button: Resets device / scrolls down inside main menu. 7. MENU / ENTER button: Activates main menu / Confirms (momuntary push) or goes back a step (held > 1.5 s) inside main menu. 1 2 3 4 5 6 7 Dimensions Dimensions listed in inches (mm). Figure 2 - CMD420 / CMD421 front display 1.42” (36) 2.78” (70.5) 1.87” (47.5) 1.22” (31.1) 2.66” (67.5) 1.77” (45) 3.54” (90) 1 2 3 Menu Flow Chart for Common Settings Figure 4 through figure 8 on the reverse side of this document contain flow charts for modify- ing commonly used features and settings in the device’s main menu. Not all available features are listed in this document. For more information, consult the CMD420 / CMD421 user manual. R T Menu Legend MENU / ENTER button DOWN ARROW button UP ARROW button Momuntary button push < 1.5 s Hold button for at least 1.5 s, then release > 1.5 s Normally energized mode (N/E) Failsafe mode “N/C” in device settings menu Power ON, normal state (no alarms) Power OFF Power ON, alarm state 11-12 OPEN 11-14 CLOSED 11-12 CLOSED 11-14 OPEN 11-12 CLOSED 11-14 OPEN 21-22 OPEN 21-24 CLOSED 21-22 CLOSED 21-24 OPEN 21-22 CLOSED 21-24 OPEN Normally deenergized mode (N/D) Non-failsafe mode “N/O” in device settings menu Power ON, normal state (no alarms) Power OFF Power ON, alarm state 11-12 CLOSED 11-14 OPEN 11-12 CLOSED 11-14 OPEN 11-12 OPEN 11-14 CLOSED 21-22 CLOSED 21-24 OPEN 21-22 CLOSED 21-24 OPEN 21-22 OPEN 21-24 CLOSED Relay Operation Setting Device Alarm State K1 STATE K2 STATE Device Relay Conditions Wiring - Contacts Using a normally closed or normally open contact utilizes two factors: wiring out of the proper terminal, and setting the respective contact to normally energized or deenergized operation. Refer to the chart below for relay conditions. For changing the energized state of the contact, refer to “Figure 7 - Contact operation” on the reverse side of this document. The factory default is normally deenergized operation for relays K1 and K2. 4

Manual EN CMD420/421 Current monitoring device for monitoring of 3AC current with current transformer for overcurrent or undercurrent or in window mode for overcurrent and under current Software version CMD420: D287 V1.1x Software version CMD421: D294 V1.1x CMD42x_D00101_01_M_XXEN/10.2021

Manual EN CMD420 CMD421 Current monitoring device for monitoring of 3AC current with current transformer for overcurrent or undercurrent or in window mode for overcurrent and undercurrent Software version CMD420: D287 V1.1x Software version CMD421: D294 V1.1x CMD420-421_D00101_M_XXEN/07.2016