Self-powered feeder protection
1MDB07217-YN
REJ603
Product version: 3.0
Issued: 2017-011-21
Revision: E
4
ABB
Table 3.
Application configurations and supported functions, continued
Functionality
ANSI
IEC
B
Measurement
Three-phase current measurement
3I
3I
●
Residual current measurement
In
I0
●
Thermal level
ϑ
ϑ
●
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
(LI) and IDMT characteristics as per ANSI
C37.112 Moderate inverse, Normal Inverse, Very
inverse, Extremely inverse. The
relay also has
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.
.
Figure 1. Functionality overview for REJ603
