Description

The ABB REF 615 is a feeder protection and control relay (IED) from ABB’s Relion 615 series, providing overcurrent, earth fault, voltage, frequency, and autoreclosure protection for medium-voltage feeders. It supports IEC 61850, DNP3, and Modbus communication protocols for substation automation integration. The REF 615 is part of ABB’s modern standardised protection relay platform used globally in distribution substations.