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.
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