Protection Functions - ABB REJ603 Product Manual

Self-powered feeder protection
REJ603
Product version: 3.0
Table 3. Application configurations and supported functions, continued
Functionality
Measurement
Three-phase current measurement
Residual current measurement
Thermal level
Disturbance recorder
● = Included, o = Optional at the time of ordering
3.

Protection functions

REJ603 offers three-stage overcurrent and two-
stage earth-fault protection functions. The
transformer inrush detector function is
incorporated to prevent unwanted tripping's due
to energizing of transformers.
The low-set stages for overcurrent and earth-
fault protection are equipped with selectable
characteristics – Definite time (DT) and Inverse
definite minimum time (IDMT). The relay features
standard IDMT characteristics according IEC
60255-151, Normal Inverse (NI), Very Inverse
(VI), Extremely Inverse (EI), Long-time Inverse
Figure 1. Functionality overview for REJ603
4
ANSI IEC
3I 3I
In I0
ϑ ϑ
(LI) and IDMT characteristics as per ANSI
C37.112 Moderate inverse, Normal Inverse, Very
inverse, Extremely inverse. The
special characteristics like RI, HR and FR fuse,
which allows better co-ordination with the rest of
the network.
Further relay offers thermal overload protection
for feeder, cable and transformer.
.
1MDB07217-YN
Issued: 2017-011-21
Revision: E
B
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relay also has
ABB