Overview
The ABB REM620E_1G, part of the REM620 motor protection relay series, processes motor current and voltage measurements to execute protection, monitoring, and control functions. The relay supports motor thermal supervision, start-up monitoring, phase overcurrent protection, and configurable communication with compatible protection and control systems. Exact hardware specifications depend on the installed order code and configuration.
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | REM620E_1G |
| Base Model | REM620 |
| Brand | ABB |
| Product Type | Motor Protection and Control Relays |
| Series | Relion 620 Series |
| Protection Application | Motor protection and control |
| Rated Frequency | 50 / 60 Hz, configuration dependent |
| Rated Current | 1 A or 5 A, according to current input configuration |
| Voltage Measurement | Configuration dependent |
| Protection Functions | Thermal overload, motor start-up supervision, phase overcurrent, and earth-fault protection, subject to configuration |
| Communication | IEC 61850 and other supported protocols, depending on hardware and firmware |
| Configuration Software | ABB PCM600 with compatible connectivity package |
Protection Logic and Industrial Communication
The REM620 uses configured protection functions to evaluate motor electrical measurements and initiate alarms or trip commands when programmed operating criteria are met.
- Thermal protection: Uses a thermal model to estimate motor heating under operating and overload conditions.
- Start-up supervision: Evaluates motor starting conditions and supports protection against prolonged starts and locked-rotor conditions.
- Current protection: Supports configured phase overcurrent and earth-fault functions.
- Communication: Compatible communication interfaces and protocols depend on the installed hardware and firmware revision. IEC 61850 functions must be verified against the applicable product configuration.
- Engineering: PCM600 supports parameter configuration, application logic engineering, and disturbance record analysis when the appropriate connectivity package is installed.
For integration into a protection network, verify the relay’s communication interface, protocol edition, firmware compatibility, and configured data points before commissioning.
Frequently Asked Questions (FAQ)
Q: Can the REM620 be replaced while the switchgear remains energized?
A: Do not assume that energized replacement is permitted. Verify the specific relay construction, withdrawable-unit design, switchgear interlocks, and manufacturer safety instructions before removing the device.
Q: Can a REM620 configured for 1 A current inputs be connected directly to 5 A current transformers?
A: The current transformer secondary rating must match the relay’s installed current input configuration. Verify the hardware order code and wiring diagram before connecting the secondary circuits.
Q: Does every REM620 configuration support IEC 61850 and PRP/HSR redundancy?
A: Do not assume that every configuration supports every communication or redundancy feature. Confirm the installed communication hardware, firmware revision, and applicable product documentation.
Field Installation Guidelines
- Verify the complete order code, hardware revision, auxiliary supply rating, and current and voltage input ratings before installation.
- Isolate the relevant circuits and follow the switchgear manufacturer’s safety procedures before wiring or removing the relay.
- Wire current transformer secondary circuits according to the approved schematic. Never open an energized current transformer secondary circuit.
- Connect voltage measurement circuits and binary inputs and outputs according to the terminal diagram for the installed variant.
- Separate low-level signal wiring from power conductors where practicable. Apply cable shielding and grounding according to the manufacturer’s instructions and site EMC requirements.
- Confirm auxiliary power polarity and voltage compatibility before energizing the device.
- Load the approved protection settings using compatible engineering software. Verify trip logic, alarm assignments, communication mapping, and time synchronization during commissioning.
- Record the firmware revision, configuration files, and tested protection settings in the commissioning documentation.
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