Overview

REF601 is a dedicated feeder protection relay, intended for the protection

and control of utility substations and industrial power systems. 

The relay is compatible with the Rogowski coil sensor for current measurement. 

The feeder protection relay REF601 is designed to unleash the advantages of

current sensors for protection and control in medium voltage applications.

The REF601 features compact size and ease of use. 

The features include:

Sensor input for phase current measurement

Earth current measurement internally or externally through CBCT

Three-stage overcurrent protection

Two-stage earth-fault protection

Inrush detection for stability during transformer charging

Local and remote control of circuit breaker

Trip Circuit Supervision

Lockout function

100 event logs

Two analogue fault records

Non-resettable trip counter

On-line current measurements in primary value

Comprehensive local HMI

Universal auxiliary supply

Compact design suitable for circuit breaker or panel mounting

Optional MODBUS RTU communication

Non-volatile memory for setting and fault records

Self-supervision

User selectable rated frequency 50 / 60 Hz

Operation Functionality