ABB REJ601, Product Manual, Page: 14 / 24

Feeder protection and control / Feeder protection 1MDB07221-YN
REF601 / REJ601
Product version: 2.2 FP2 Issued: 2017-05-09
Revision: A
14 ABB
18. Protection functions
Table 23. Low-set phase overcurrent protection, stage 3I> / 51
Parameter Value (Range)
Setting range of pick-up current ‘I >’ 0.5...2.5 x In in steps 0.001, infinite
Operation accuracy ± 5.0% of set value, ± 10.0% of set value for set value < 0.2
Operate time delay (DMT) ‘t >’ 0.04...64 s in steps of 0.01
Minimum IDMT Trip level 1.2 x setting of pick-up current “I >”
Operation time accuracy ± 5.0% of set value or ± 30 ms
Operating curve type 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
Time multiplier setting ‘k’ 0.02...1.6, in steps of 0.01
Operation time accuracy

IEC and ANSI characteristics

RI characteristics
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
Reset ratio IDMT : 0.96 and DT : 0.98
Table 24. High-set phase overcurrent protection, stage 3I>> / 50-1
Parameter Value (Range)
Setting range of pick-up current ‘I>>’ 0.5...25.0 x In in steps 0.001, infinite
Operation accuracy ± 5.0% of set
Operation mode Definite time, Instantaneous
Operate time delay (DMT) ‘t >>’ 0.04...64 s in steps of 0.01
Operation time accuracy ± 5.0% of set value or ± 30 ms
Reset ratio 0.98
Table 25. Very high-set phase overcurrent protection, stage 3I>>> / 50-2
Parameter Value (Range)
Setting range of pick-up current ‘I>>’ 0.5...25.0 x In in steps 0.001, infinite
Operation accuracy ± 5.0% of set
Operation mode Definite time, Instantaneous
Operate time delay (DMT) ‘t >>>’ 0.03...64 s in steps of 0.01
Operation time accuracy ± 5.0% of set value or ± 15 ms
Reset ratio 0.98