REF615E-1G HBFDACADABC1BNN21G CONTROL RELAY

The REF615 is a dedicated feeder IED perfectly aligned for the protection, control, measurement and supervision of
utility substations and industrial power systems. REF615 is a member of ABB’s Relion® family and a part of its 615
protection and control product series. The 615 series IEDs are characterized by their compactness and withdrawable
design. 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.
Unique REF615 ANSI features
• Four setting groups
• Drawout design
• High impedance (HIZ) fault detection
• Arc flash detection (AFD)
• Thermal overload protection of feeder cable
• Ring-lug terminals for all inputs and outputs
• Large, easy to read LCD screen
• Environmentally friendly design with RoHS compliance

REF615E-1G

Application
The REF615 provides main protection for overhead lines, cable feeders, and busbar systems of distribution substations. It can
be applied for protection and control of grounded and ungrounded distribution systems. Flexible order coding allows for
choosing current-only or current-and-voltage configurations to best fit your distribution feeder application needs.
Protection and control
REF615 is the most powerful, advanced and simplest feeder protection relay in its class, perfectly offering time and
instantaneous overcurrent, negative sequence overcurrent, phase discontinuity, breaker failure, thermal overload, and

voltage metering and protection. The relay also features optional high impedance fault (HIZ) and sensitive earth fault (SEF) protection
for grounded and ungrounded distribution systems. Also, the relay incorporates a flexible three-phase multi-shot auto-reclose
function for automatic feeder restoration in temporary faults on overhead lines.