ABB REM620E-1G | Motor Protection and Control Relay

ABB REM620E-1G – Motor Protection and Control Relay

Product Overview

The ABB REM620E-1G is a dedicated motor management relay from the Relion® 620 series, designed for the protection, control, measurement, and supervision of medium- and large-sized asynchronous and synchronous motors-17-3. As a member of ABB’s 620 protection and control product family, this relay addresses the critical industrial challenge of safeguarding valuable motor assets against electrical faults, thermal overload, and mechanical stress-17.

The REM620E-1G is typically deployed with circuit-breaker or contactor-controlled medium-voltage motors and contactor-controlled low-voltage motors in continuous and intermittent duty applications, including pumps, conveyors, crushers, mixers, agitators, fans, and aerators-16. Its core differentiator is integrated differential protection—a feature essential for detecting stator winding short circuits in large motors where conventional overcurrent protection alone is insufficient-16-.

Engineered for demanding industrial environments, the REM620E-1G delivers comprehensive motor protection during start-up, normal running, and fault conditions-. With native support for IEC 61850 Edition 1 and 2 communication standards, including GOOSE messaging, HSR, and PRP redundancy protocols, this relay integrates seamlessly into modern digital substation architectures-17-4.

Technical Specifications

Parameter	Specification
Product Model	REM620E-1G
Manufacturer	ABB (Finland / Sweden)
Product Type	Motor Protection and Control Relay
Series	Relion® 620 Series
Protection Object	Medium- and large-sized asynchronous / synchronous motors
Current Rating (In)	5 A (1 A optional)-
Auxiliary Supply Voltage	85–264 V AC/DC (wide-range)–1
Rated Frequency	50 / 60 Hz-1
Operating Temperature	-40°C to +70°C-2
Communication Protocols	IEC 61850 Ed1/Ed2, GOOSE, HSR, PRP, IEC 61850-9-2 LE, Modbus, DNP3, IEC 60870-5-103-4-17
Time Synchronization	IEEE 1588 V2 Precision Time Protocol-4
Display	Large graphical LCD with customizable SLDs-3-4
Mounting	Withdrawable plug-in unit-17
Weight	Approx. 2.5 kg-
Certifications	CE, UL, IEC 60068
Compliance	IEC 61850, IEEE C37.2, ANSI

ABB REM620E-1G

Key Features and Benefits

• Comprehensive Differential Protection — Provides stabilized and instantaneous differential protection, with an alternative high-impedance/flux-balance based differential option for sensitive stator winding fault detection-1-16.
• Advanced Thermal Management — Dual time-constant thermal overload model with RTD input support for direct temperature measurement of motor bearings and stator windings, preventing premature aging-1-16.
• Full-Spectrum Motor Protection — Covers block rotor, long start, frequent start inhibition, phase loss/unbalance, loss of synchronism (for synchronous motors), over/under voltage, frequency anomalies, reverse power, and loss of excitation-1.
• Flexible Measurement Inputs — Supports both conventional instrument transformers (CTs/VTs) and sensor-based phase current and voltage measurement, with RTD and mA inputs for extended supervision-17-16.
• IEC 61850 Native Communication — Full compliance with Editions 1 and 2, including HSR and PRP redundancy for communication fault tolerance, GOOSE messaging for fast peer-to-peer data exchange, and IEC 61850-9-2 LE process bus for reduced wiring-4-16.
• Withdrawable Plug-In Design — Enables swift installation, testing, and replacement without decommissioning the entire panel, minimizing maintenance downtime-17-4.
• Intuitive HMI with SLD — Large graphical display shows customizable single-line diagrams with switching device position indication, accessible locally or via web browser-based HMI-16-4.
• Dual Communication Protocol Support — Capable of running two communication protocols simultaneously; redundant Ethernet with two optical or galvanic interfaces available-16.

Related Models

REF620 — Feeder protection and control relay from the same 620 series, designed for utility and industrial distribution networks-.

RET620 — Transformer protection and control relay within the Relion 620 family for power transformer applications-.

REM620A_F — Variant of the motor protection relay with arc flash detection (AFD) functionality-.

SPA-ZC 302 — Protocol adapter that enables Profibus DPV1 connectivity for the REM620 series-16.

Installation and Maintenance

The REM620E-1G features a withdrawable plug-in unit design that simplifies installation and testing-17. The relay mounts into a standard 19-inch rack or panel cutout with the associated case and backplane connector—no additional cabling is required for internal communication. Ensure the operating environment remains within -40°C to +70°C and observe proper clearance for the large graphical display and front-panel push buttons-2.

Routine maintenance includes periodic inspection of LED status indicators, terminal connections, and display functionality. The relay supports online configuration changes and firmware updates via Protection and Control IED Manager PCM600, ABB’s engineering tool-. The comprehensive self-supervision functions monitor relay health, trip circuit integrity, and circuit breaker condition, providing basic information for scheduling maintenance-. For redundant communication setups, the dual Ethernet interfaces enable seamless failover without disrupting protection functionality-16.