ABB REF615 ANSI Feeder protection and control Application

The REF615 is a dedicated feeder protection and control relay perfectly

aligned for the protection, control,measurement and supervision of

utility substations and industrialpower systems.

REF615 is a member of ABB’s Relion® family and a part

of its 615 protection and control product series. The

615 series protection and control relays are character

ized 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 interoperabil

ity of substation automation devices.

Application

The REF615 provides main protection for overhead

lines, cable feeders, and busbar systems of distribu

tion substations. It can be applied for protection and

control of grounded and ungrounded distribution sys

tems. Flexible order coding allows for choosing cur

rent-only or current-and-voltage configurations to

best fit your distribution feeder application needs.

Protection and control

The REF615 is the most powerful, advanced and sim

plest feeder protection relay in its class, perfectly of

fering time and instantaneous overcurrent, negative

sequence overcurrent, phase discontinuity, breaker

failure, thermal overload, and voltage metering and

protection. The relay also features optional high im

pedance fault (HIZ) protection for grounded and un

grounded distribution systems. Also, the relay incor

porates a flexible three-phase multi-shot auto-reclose

function for automatic feeder restoration in tempo

rary faults on overhead lines.

Enhanced with safety options, the relay offers a

three-channel arc-fault detection system for supervi

sion of the switchgear.

The REF615 also integrates basic control functionality,

which facilitates the control of one circuit breaker via

the relay’s front panel human machine interface (HMI)

or remote control system. To protect the relay from

unauthorized access and to maintain the integrity of

information, the relay has been provided with a four

level, role-based user authentication system, with in

dividual passwords for the viewer, operator, engineer,

and administrator levels. The access control system

applies to the front panel HMI, embedded web

browser based HMI, and the PCM600 relay setting and

configuration tool.