Description
ABB REF542Plus — 2RCA029395
| Parameter | Specification |
|---|---|
| Brand | ABB |
| Product Category | Compact Feeder Protection and Control Terminal |
| Model | REF542Plus / 2RCA029395 |
| Auxiliary Supply | 48–250 V DC / 100–240 V AC |
| Operating Temperature | -25 °C to +70 °C |
| Protection Class | IP54 front / IP20 rear |
| Protection Functions | Overcurrent (50/51), Earth Fault (50N/51N), Thermal (49), Voltage (27/59) |
| Digital Inputs | 16 |
| Digital Outputs | 8 |
| Analog Inputs | 4 CT/VT |
| Communication | IEC 61850, Modbus TCP/RTU, Profibus DP |
| Trip Time | ≤ 20 ms typical |
| HMI | Graphical LCD + pushbuttons |
| Mounting | Panel / switchgear front |
| Compatibility | UniGear and similar MV switchgear |
| Warranty | One Year |
Overview: The ABB REF542Plus 2RCA029395 is an integrated protection, measurement, and control terminal designed for compact medium-voltage switchgear bay applications. It merges protection, metering, bay control, and HMI into a single panel-mount unit. Switchgear manufacturers, panel builders, and retrofit projects benefit from its reduced wiring, standardized form factor, and multi-protocol capability.
Key Functions:
- Feeder and Bay Protection: Phase and ground overcurrent, thermal overload, and undervoltage/overvoltage protection with selectable IEC/ANSI curves.
- Integrated Bay Control: Direct breaker disconnector/ground-switch control, interlocking logic, and synchrocheck—eliminating separate hardwired logic.
- Local and Remote Operation: Front-panel HMI enables local control and settings; IEC 61850 GOOSE/MMS provides full SCADA integration.
- Fast and Dependable Tripping: Protection decisions typically complete within 20 ms, limiting equipment damage and improving voltage quality during faults.
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