Application; Optimised For Limited Space - ABB REJ601 Product Manual

Feeder protection and control / Feeder protection
REF601 / REJ601
Product version: 2.2FP2
Figure 1. Functionality overview for REF601 standard configuration E with current transformer inputs
4.

Application

The REF601/REJ601 is a protection relay aimed
at protection and control of incoming and
outgoing feeders in MV distribution substations.
The relay can be applied for the short-circuit,
over current and earth-fault protection of
overhead lines and cable feeders of distribution
and sub-distribution network.
The inrush current stabilization function allows
the relay to be used as main protection of
distribution transformers.
The relay with application configuration E offers,
non-directional over current and earth-fault
protection. The residual current for the earth-
fault protection is derived from the phase
currents. When applicable, the core-balance
current transformers can be used for measuring
the residual current, especially when sensitive
earth-fault protection is required.
5
The relay additionally offers thermal overload
protection for feeders, cables and transformers,
phase discontinuity (signle phasing) protection
and circuit breaker failure protection.
The relay provides highest functionality with
incorporation of negative phase sequence
protection and multi shot auto-reclose
functionality making relay suitable for overhead
line feeders.
5.

Optimised for limited space

With its compact size and unique technical
features, REF601/REJ601 is an ideal relay for
retrofits, compact switchgears and switchgear
with limited space. The relay has small mounting
depth and does not have any loose mounting ac-
cessories, while the press-fit mounting
arrangement makes it suitable for quick and
easy installation on switchgear
1MDB07221-YN
Issued: 2017-05-09
Revision: A
ABB