Schneider Electric REL52121
MPNREL52121
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Square D REL52121 Protection Relay|Square D REL52121 Protection Relay
$3,955.00Ref. price · indicative, final on quote
StockContact for availability
MOQ1 pcs
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Jul 2026
How we verify every order →Specifications
| Parameter | Value |
|---|---|
| Type | Differential current relay |
| Display type | LCD 128 x 128 pixels with single line diagram LCD 128 x 128 pixels with ANSI symbols |
| Range of product | PowerLogic P3 |
| Product or component type | Protection relay |
| Switchgear diagnosis type | CT/VT supervision Trip circuit supervision TCS |
| Climatic withstand | Exposure to dry heat Bd EN/IEC 60068-2-2 Exposure to cold Ad EN/IEC 60068-2-1 Exposure to damp heat in service Db EN/IEC 60068-2-30 Exposure to damp heat in service Cab EN/IEC 60068-2-78 |
| Power supply | 48...230 V AC/DC |
| IP degree of protection | IP54 front IEC 60529 |
| Communication ports | Front USB port 1 Rear RJ45 1 Rear RS485 1 |
| Communication protocols | IEC 61850 ed. 1 IEC 61850 ed. 2 IEC 60870-5-101 DNP3 TCP Modbus TCP EtherNet/IP IEC 60870-5-103 DNP3 Modbus RTU DeviceNet SPAbus |
| Time synchronisation protocol | SNTP |
| Mounting mode | Flush mounting |
All specifications
| Parameter | Value |
|---|---|
| Device mounting | Flush |
| Mounting case size | 30TE |
| Connections - terminals | Screw removable (digital input/output) Ring lugs fixed (current transformer) Pin removable (voltage transformer) |
| Relative humidity | 0...95 %, without condensation |
| Maximum operating altitude | 6561.68 ft (2000 m) |
| Depth | 9.06 in (230 mm) |
| Width | 10.6 in (270 mm) |
| Height | 6.9 in (176 mm) |
| Category | US1PL1S11405 |
| Web server | Embedded HTTP server |
| Cybersecurity | Password protection Port hardening |
| Number of key | 2 customizable |
| Software name | ESetup Easergy Pro virtual simulation test Easergy SmartApp |
| Local signalling | 2 LEDs 16 LEDs programmable |
| Logs and records | Event recording Disturbance recording Tripping context |
| Measuring inputs | 6 1/5 A CT phase current 2 5/1 A CT residual current 1 1/0.2 A CT residual current 4 100 V/110 V VT voltage |
| Control functions | Switchgear control and monitoring Programmable switchgear interlocking Local control on single-line diagram Local control with I/O keys Local/remote control 2 function keys Mobile application with Easergy SmartApp Web-server Programmable logic |
| Product reference | P3M32-CGG1A-AA1FA-BBAAB |
| Relay application | Motor |
| Operating threshold | 110 V AC/DC |
| Arc flash protection | No |
| Monitoring functions | Trip circuit supervision 74 Circuit breaker monitoring Relay self-monitoring |
| Protection functions | Synchro-check 25 Undervoltage 27 Directional active underpower 32 Phase undercurrent 37 Negative sequence overcurrent 46 Phase sequence 46 Excessive starting time, locked rotor 48/51LR Thermal overload protection 49 Earth fault overcurrent 50N/51N Phase overcurrent 50/51 Breaker failure 50BF Switch ON to fault (SOTF) Capacitor bank unbalance 51C Capacitor overvoltage 59C Overvoltage 59 Earth fault overvoltage 59N Stator earth fault 64S Restricted earth fault 64REF Motor restart inhibition 66 Directional phase overcurrent 67 Directional earth fault 67N Magnetising inrush detection 68F2 H5 detection 68H5 Underfrequency 81/81N Rate of change of frequency 81R Lockout relay 86 Machine differential 87M Programmable stages 99 8 Programmable curve Cold load pick-up CT supervision 60 VT supervision 60FL |
| Protective treatment | Conformal coating |
| Measurement functions | Current 3-phase Current zero sequence Current positive sequence Current negative sequence Current ratio of negative and positive Voltage phase to earth Voltage phase to phase Voltage zero sequence Voltage positive sequence Voltage negative sequence Voltage ratio of negative and positive Short circuit fault reactance Fault location current Earth fault reactance Frequency Active power RMS active power Reactive power RMS reactive power Apparent power RMS apparent power Active energy Reactive energy Cos φ Tan φ Power angle Power factor Voltage phasor diagram view Current phasor diagram view Current 2nd, 15th harmonics with THD Voltage 2nd, 15th harmonics with THD Condition monitoring CB wear Voltage interruption |
| Mechanical robustness | Vibrations class II) IEC 60255-21-1 VibrationsFc IEC 60068-2-6 Shocks class II) IEC 60255-21-2 ShocksEa IEC 60068-2-27 Seismic tests method A class II) IEC 60255-21-3 |
| Number of setting groups | 4 |
| Number of analogue inputs | 0 |
| Number of analogue outputs | 0 |
| Electromagnetic compatibility | Emission tests IEC/EN 60255-26 ed. 3 Emission tests class A CISPR 11 Emission tests class A CISPR 22 EMC immunity IEC/EN 60255-26 ed. 3 EMC immunity EN/IEC 61000-4-18 EMC immunity IEC 60255-22-1 EMC immunity level 4 EN/IEC 61000-4-2 EMC immunity IEC 60255-22-2 EMC immunity level 3 EN/IEC 61000-4-3 EMC immunity IEC 60255-22-3 EMC immunity level 4 EN/IEC 61000-4-4 EMC immunity IEC 60255-22-4 EMC immunity level 3 EN/IEC 61000-4-5 EMC immunity IEC 60255-22-5 EMC immunity level 3 EN/IEC 61000-4-6 EMC immunity IEC 60255-22-6 EMC immunity EN/IEC 61000-4-8 EMC immunity level 5 EN/IEC 61000-4-9 EMC immunity EN/IEC 61000-4-29 EMC immunity EN/IEC 61000-4-11 EMC immunity EN/IEC 61000-4-17 EMC immunity IEC 60255-27 EMC immunity class III IEC 60255-5 EMC immunity EN/IEC 60255-1 |
| Number of digital inputs | 12 |
| Number of digital outputs | 14 DO 1 watchdog |
| Controllable switchgear devices | 6 controlled + 6 displayed |
| Ambient air temperature for operation | -40...149 °F (-40...65 °C) |
MPN
REL52121