ABB REF542PLUS Feeder Terminal – Key Functions
1. Protection & Control
Overcurrent, earth fault, and thermal overload protection
Auto-reclosing (up to 4 shots) and synchrocheck
2. Grid & DER Support
Power quality monitoring (harmonics, voltage sags)
Islanding detection for renewable integration
3. Communication
IEC 61850 (GOOSE/MMS), Modbus, DNP3.0
Dual Ethernet (PRP/HSR redundancy)
4. Monitoring & Access
Local HMI (5.7″ LCD) & remote web interface
Circuit breaker condition monitoring
5. Robust Design
Compact 4U size, -40°C to +70°C operation
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