Protection Functions - ABB REJ601 Product Manual

Feeder protection and control / Feeder protection
REF601 / REJ601
Product version: 2.2 FP2

18. Protection functions

Table 23. Low-set phase overcurrent protection, stage 3I> / 51
Parameter
Setting range of pick-up current 'I >'
Operation accuracy
Operate time delay (DMT) 't >'
Minimum IDMT Trip level
Operation time accuracy
Operating curve type
Time multiplier setting 'k'
Operation time accuracy
 IEC and ANSI characteristics

RI characteristics
Reset ratio
Table 24. High-set phase overcurrent protection, stage 3I>> / 50-1
Parameter
Setting range of pick-up current 'I>>'
Operation accuracy
Operation mode
Operate time delay (DMT) 't >>'
Operation time accuracy
Reset ratio
Table 25. Very high-set phase overcurrent protection, stage 3I>>> / 50-2
Parameter
Setting range of pick-up current 'I>>'
Operation accuracy
Operation mode
Operate time delay (DMT) 't >>>'
Operation time accuracy
Reset ratio
14
Value (Range)
0.5...2.5 x In in steps 0.001, infinite
± 5.0% of set value, ± 10.0% of set value for set value < 0.2
0.04...64 s in steps of 0.01
1.2 x setting of pick-up current "I >"
± 5.0% of set value or ± 30 ms
IEC 60255-3:
Normal inverse, Very inverse, Extremely inverse, Long-time inverse
ANSI C37.112:
Moderate inverse, Normal Inverse, Very inverse, Extremely inverse
Special curves: RI inverse
0.02...1.6, in steps of 0.01
class E(5) or ± 30 ms, class E(7.5) or ± 30 ms for set value < 0.2
± 5.0% of set value or ± 30 ms
IDMT : 0.96 and DT : 0.98
Value (Range)
0.5...25.0 x In in steps 0.001, infinite
± 5.0% of set
Definite time, Instantaneous
0.04...64 s in steps of 0.01
± 5.0% of set value or ± 30 ms
0.98
Value (Range)
0.5...25.0 x In in steps 0.001, infinite
± 5.0% of set
Definite time, Instantaneous
0.03...64 s in steps of 0.01
± 5.0% of set value or ± 15 ms
0.98
1MDB07221-YN
Issued: 2017-05-09
Revision: A
ABB