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The ABB REM610 (also denoted as REM 610 or part of the RE_610 series) is a versatile motor protection relay from ABB's legacy Relion® 610 product family, designed for the protection, measurement, and supervision of medium-sized and large asynchronous low-voltage (LV) motors, as well as small to medium-sized high-voltage (HV) asynchronous motors. The ABB REM610 handles electrical faults during motor startup, normal running, idling, and standstill cooling in applications such as pumps, fans, mills, crushers, and other process/manufacturing equipment. The ABB REM610 provides comprehensive thermal and current-based protection, including overload, stall/startup supervision, short-circuit, unbalance, and earth-fault functions, with optional RTD/thermistor support for enhanced temperature monitoring. The ABB REM610 features a microprocessor-based design with self-supervision, disturbance recording, non-volatile memory, and flexible communication (SPA-bus, IEC 60870-5-103, Modbus). The ABB REM610 supports circuit-breaker or contactor-controlled drives and can also protect cables/transformers requiring thermal overload alongside overcurrent/earth-fault functions. Note: The ABB REM610 is a legacy product, no longer active since 2017, with spares and support still available for existing installations. Overall, the ABB REM610 offers reliable, multifunction motor protection in industrial environments.

Model / Product,REM610 (RE_610 series Motor Protection Relay)

Device Type,Multifunction numerical motor protection relay

Primary Application,"Protection of LV large motors and small/medium HV asynchronous motors (pumps, fans, mills, crushers, etc.)"

Protection Functions (IEC/ANSI),"Thermal overload (49M), Startup supervision (48/14), Overcurrent definite-time (51/14), Short-circuit instantaneous/definite-time (50/51), Undercurrent/loss of load (37), Earth-fault definite-time (50N/51N), Unbalance/negative-sequence (46), Phase reversal (46R), Cumulative startup counter & restart inhibit (66/37), CB failure (62BF), Temperature (RTD/PTC) (49/38), Emergency start"

Analog Inputs,"4 current inputs (1 A or 5 A rated, thermal withstand up to 500 A/1 s for 5 A variant)"

Binary I/O,"2 galvanically isolated digital inputs (standard); +3 on optional RTD module; multiple outputs (3 power NO contacts, 2 change-over signal, IRF)"

Communication,"Front: Optical (wireless/cable); Rear: Optional module (plastic/glass fiber, RS-485) for SPA-bus, IEC 60870-5-103, Modbus RTU/ASCII"

Power Supply Variants,High: 100–240 V AC / 110–250 V DC; Low: 24–60 V DC (burden<9 W quiescent / <13 W operating)

Operating Temperature,Typically -25 °C to +55 °C (industrial; refer to manual for exact)

Case / Mounting,"Flush/panel mount; 177 mm × 177 mm frame (4U height), case 164 × 160 × 149.3 mm; detachable plug-in unit"

HMI,"Alphanumeric LCD, push-buttons, 8 programmable LEDs, front optical port"

Additional Features,"Disturbance recorder (up to 80 s, 4 analog + 8 digital channels), Event recorder (100 events), Trip-circuit supervision, Self-supervision, Battery-backed RTC, 2 setting groups"

Enclosure Rating,"IP54 front, IP40/IP20 rear"

Country of Origin,Finland / Sweden (typical ABB)

Life Cycle Status,Legacy (inactive since 2017; spares/support available)

Mount the ABB REM610 in a panel/rack with proper ventilation/grounding; insert plug-in unit securely.

Connect auxiliary power (verify variant/range); green "ready" LED should illuminate on the ABB REM610 after power-up.

Wire CT inputs (phases L1/L2/L3, earth-fault if used), digital inputs (e.g., speed switch, emergency start), and outputs (trips, signals) per polarity/diagram.

Set rated frequency (50/60 Hz), CT ratios, motor parameters (e.g., full-load current, thermal time constants), and protection settings via HMI or PC tool (Relay Setting Tool).

Configure communication protocol (rear module if used) and time synchronization (via DI if needed).

Commission: Perform secondary injection tests for key functions (thermal, overcurrent, earth-fault); verify pickup/timing, startup supervision, and restart inhibit on the ABB REM610.

Monitor via HMI: Check measured currents, thermal status, events, and alarms during motor operation.

Only qualified personnel should install/service the ABB REM610, following ABB safety guidelines, IEC standards, and manuals (e.g., 1MRS752263 Technical Reference Manual).

Isolate power/CT circuits, lock out/tag out, short CT secondaries, discharge energy, and confirm zero voltage before wiring/handling the ABB REM610.

Use shielded cables for analogs, proper grounding (shields single-point), and avoid open CTs when energized to prevent hazards.

Ensure CT ratios/polarity match settings; verify auxiliary voltage matches variant (high/low) and ripple limits.

Mount in controlled environment (temperature/humidity/vibration per specs); use ESD protection during plug-in unit handling.

Do not modify hardware or exceed ratings; test trip-circuit supervision after wiring.

Check front HMI LEDs (green ready, yellow alarm, red trip) and display on the ABB REM610 each shift for healthy status or faults.

Monitor measured values (currents, thermal capacity, unbalance), events, and disturbance records via HMI for anomalies.

Inspect enclosure, cabling, terminals, and mounting for tightness, corrosion, dust, or damage affecting the ABB REM610.

Verify auxiliary power stability and battery charge (for RTC); note any self-supervision alarms/IRF indications.

Clean ventilation/display (power off first) to prevent overheating or visibility issues on the ABB REM610.

Review event logs and protection counters (e.g., starts, trips) periodically; backup settings if changes occur.

During planned outages, perform injection tests on critical functions (thermal, short-circuit, earth-fault) and contact ABB/Hitachi Energy support for legacy spares, firmware, or diagnostics on the ABB REM610.

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Who can I contact if I encounter any problems?

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