Optimized for limited space

With their compact size and unique technical features, the 

REF601 and REJ601 are ideal for retrofits, compact switchgear 

and switchgear with limited space. These relays have a small 

mounting depth and do not have any loose mounting accessories. 

Uniquely, the REF601 and REJ601 use a press-fit mounting 

arrangement, suitable for quick and easy installation on switchgear

Control 

The REF601 features control of one circuit breaker with dedicated push-buttons and guidance on local HMI for opening and closing. 

It includes two dedicated outputs for breaker control. 

The breaker control is also possible through optional MODBUS RTU or IEC 60870-5-103 communication.

Measurement 

All versions of the relay continuously measure phase currents 

and ground current. Ground current can be measured using an 

external zero sequence current transformer or can be calculated internally.

During operation, the default view of display shows the highest 

loaded phase current in primary terms (Amps) and the ground current. 

The values measured can be accessed locally via the 

user interface on the relay or remotely via the communication interface of the relay. 

These relays continuously measure negative sequence current, 

thermal level and counter values if these functions are supported as per application configurations.