REF601 is a numerical feeder protection relay, designed for the protection and control of utility and industrial power systems, in primary and secondary distribution network. REF601 is a member of ABB’s Relion® product family and a part of its 605 product series.
The relay provides an optimized composition of protection, monitoring and control functionality in one unit, with the best performance usability in its class.
The relay uses Rogowski current sensors or conventional current transformer for measurement.