Feeder protection relay REF615R

The most powerful, advanced, and simplest feeder protection relay in its class

REF615R is a dedicated feeder relay, perfectly aligned for protection, control, measurement, and supervision of utility substations and industrial power systems. The 19 inch rack mount form of ABB’s Relion® REF615 utilizes the same form and fit as the DPU2000R relay and provides exact wire-alike matching rear terminals, making the REF615R the ideal solution for upgrading to the industry’s latest technologies. Engineered from the ground up, the 615 series has been designed to unleash the full potential of the IEC 61850 standard for communication and interoperability of substation automation devices while providing Modbus and DNP simultaneously in one standard configuration.


  • Feeder protection for overhead lines, cable feeders, and busbar systems of distribution substations designed to upgrade DPU2000R and to be installed on 19” racks

Product benefits

  • Maximized capital by keeping assets working longer with designs that require less equipment and space
  • Enhanced safety by reducing hazards with safety-conscious designs
  • Increased reliability by maintaining vital operations with steady, high-quality power every minute of every day
  • Reduced operating costs with effective energy management and maintenance strategies
  • More flexible system upgrades without rewiring or changing components
  • Installation time savings

Product features

  • Drawout design
  • Underground, overhead cable fault detection (CFD)
  • High impedance (HIZ) fault detection
  • Arc flash detection (AFD)
  • Ring-lug terminals for all inputs and outputs
  • Large, easy-to-read LCD

Are you looking for support or purchase information?

Getting started

Loading documents

Related offering

Select region / language