Feeder Protection Relay – ABB REJ601
REJ601 is a dedicated feeder protection relay designed for utility and industrial power systems in primary and secondary distribution networks. It integrates optimized protection and monitoring functions in one compact unit, offering best-in-class performance and usability.In addition to the conventional CT-based variant, it also supports a Rogowski-sensor-based analog interface, enabling more compact MV switchgear designs with improved performance and standardization
Technical Specifications
Main protection for overhead lines and cable feeders in solidly-earthed, resistance-earthed, or isolated networks
Inrush current stabilization for distribution transformers
Compact, flexible, and easy to operate
Fast commissioning with selective test functions for protection, binary signals, and communication
Easily configurable binary I/O
Full hardware and software self-supervision
Enhanced safety using sensor variant and detachable terminals with CT shorting
Press-fit mounting for quick installation
Fewer variants, easier stock management
Overcurrent, earth-fault, phase discontinuity, negative-phase sequence, thermal overload protection
Inrush detection, reclosing, and measurement
Universal power supply: 24–265 V AC/DC
Configurable I/O via local HMI or communications
Selectable CT input (1A / 5A), Boolean logic, timers
Supports Modbus RTU & IEC 60870-5-103
Front USB port for downloading events, fault records, disturbance files
Inrush current stabilization for distribution transformers
Compact, flexible, and easy to operate
Fast commissioning with selective test functions for protection, binary signals, and communication
Easily configurable binary I/O
Full hardware and software self-supervision
Enhanced safety using sensor variant and detachable terminals with CT shorting
Press-fit mounting for quick installation
Fewer variants, easier stock management
Overcurrent, earth-fault, phase discontinuity, negative-phase sequence, thermal overload protection
Inrush detection, reclosing, and measurement
Universal power supply: 24–265 V AC/DC
Configurable I/O via local HMI or communications
Selectable CT input (1A / 5A), Boolean logic, timers
Supports Modbus RTU & IEC 60870-5-103
Front USB port for downloading events, fault records, disturbance files
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