Feeder Protection Relay – ABB REF601

Main protection for overhead lines and cable feeders in solidly-earthed, resistance-earthed, or isolated networks ، Inrush current stabilization for distribution transformers ، Cold-load pickup function for feeder re-energization ، Compact and flexible design ، Fast commissioning using selective test functions ، Configurable binary inputs/outputs ، Extensive hardware and software self-supervision ، Enhanced safety with sensor variant and detachable terminals with CT shorting ، Press-fit mounting for fast installation ، Fewer variants, easier stock management ، Overcurrent, earth-fault, phase discontinuity, negative-phase sequence, thermal overload protection ، Inrush detection, circuit-breaker control, reclosing, measurements ، Universal power supply: 24–265 V AC/DC ، Local HMI or communication-based I/O configuration ، Selectable CT input (1A / 5A), Boolean logic & timers ، Supports Modbus RTU and IEC 60870-5-103 ، Front USB port for downloading events, faults, and disturbance records