Protection Functions - ABB REJ603 Product Manual

Self-powered feeder protection
REJ603
Product version: 3.0

14. Protection functions

Table 22. Low-set phase overcurrent protection, stage I> / 51
Parameter
Setting range of pick-up current 'I >'
Operation accuracy
2)
Operate time delay (DMT) 't >'
Operation time accuracy definite mode
Operating curve type
Time multiplier setting 'k'
Operation time accuracy
2)
IEC, ANSI, RI, HR and FR
characteristics
Reset ratio
1) The relay's minimum powering current is 0.07 x In when currents in three phase and 0.18 x In when current in a single phase.
2) Operation time accuracy for protection functions when relay is in energised condition.
Table 23. High-set phase overcurrent protection, stage I>> / 50-1
Parameter
Setting range of pick-up current 'I >>'
Operation accuracy
1)
Operation mode
Operate time delay (DMT) 't >>'
Operation time accuracy
1)
Reset ratio
1) Operation time accuracy for protection functions when relay is in energised condition.
13
Value (Range)
0.1 ...32 x In in steps 0.001, infinite
1)
± 3.0% x In for value < 1.2 In , ± 3.0% x I for value ≥ 1.2 In
0.04...64 s in steps of 0.01
± 2.0% of set value or ± 30 ms
2)
IEC 60255-151:
Normal inverse, Very inverse, Extremely inverse, Long-time inverse
ANSI C37.112:
Moderate inverse, Normal Inverse, Very inverse, Extremely inverse
Special curves:
RI inverse, HR fuse, FR fuse
0.02...1.6, in steps of 0.01
class E(5) or ± 30 ms
class E(7.5) or ± 30 ms of theoretical value for I> set value < 0.2
IDMT : 0.96 and DT : 0.98
Value (Range)
0.2...32.0 x In in steps 0.001, infinite for CT variant
± 3.0% x In for value < 1.2 In , ± 3.0% x I for value ≥ 1.2 In
Definite time, Instantaneous
0.04...64 s in steps of 0.01
± 2.0% of set value or ± 30 ms
0.98
1MDB07217-YN
Issued: 2017-11-21
Revision: E
ABB