Overview
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | ABB REM620 |
| Brand | ABB |
| Series | Relion 620 Series |
| Product Type | Motor Protection and Control Relays |
| Origin | Finland |
| Auxiliary Voltage | 100-240 VAC (50/60 Hz), 110-250 VDC, or 24-60 VDC |
| Protection Class | IP54 front panel, IP20 rear terminals |
| Motor Protection Functions | Thermal overload, short circuit, earth fault, locked rotor, phase unbalance, voltage and frequency protection |
| Current Inputs | 1 A / 5 A phase current inputs and sensitive earth-fault current input options |
| Voltage Inputs | 100 V – 120 V nominal secondary voltage input range |
| Communication Interfaces | Ethernet, fiber optic options, IEC 61850, IEC 60870-5-103, Modbus RTU/TCP, DNP3 |
| Communication Standard | IEC 61850 Edition 1 and Edition 2 with GOOSE messaging |
| Construction Type | Withdrawable relay unit design |
ABB Industrial Control Communication and I/O Architecture
The ABB REM620 integrates industrial communication functions for protection system coordination and operational data exchange. It supports IEC 61850 communication with GOOSE messaging for direct peer-to-peer event transfer between protection devices. Additionally, the relay supports Modbus and DNP3 communication for integration with supervisory control systems.
The relay uses configurable binary inputs and outputs to execute motor control sequences and protection commands. Furthermore, the device supports optional RTD and mA inputs for direct monitoring of motor winding and bearing temperature signals.
ABB Relion protection devices use firmware-based configuration management through ABB PCM600 engineering tools. Therefore, engineers can configure protection logic, communication parameters, and control functions according to application requirements.
Frequently Asked Questions
Q: Does the ABB REM620 support IEC 61850 GOOSE communication?
A: Yes. The REM620 supports IEC 61850 communication, including GOOSE messaging for high-speed protection signal exchange between compatible devices.
Q: Can the REM620 monitor motor thermal conditions during operation?
A: Yes. The relay calculates thermal capacity usage through ANSI 49M thermal overload protection logic using configured motor heating and cooling characteristics.
Q: Does the REM620 support withdrawable installation?
A: Yes. The relay uses a withdrawable unit construction that allows removal and testing procedures while maintaining fixed secondary wiring connections.
Field Installation Guidelines
- Install the REM620 relay in a suitable protection panel with correct mechanical support for the withdrawable housing.
- Connect current transformer circuits using approved wiring methods and verify CT polarity before commissioning.
- Separate communication cables from high-current power conductors to reduce electromagnetic interference.
- Ground cable shields according to site protection standards and maintain a low-impedance grounding path.
- Verify auxiliary supply voltage compatibility before energizing the relay.
- Configure protection settings, binary I/O assignments, and communication parameters using the ABB PCM600 engineering environment.
- Perform functional testing for motor protection elements, trip outputs, and communication links before placing the relay into service.
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