ABB REF601 Product Manual page 9

ABB
Feeder Protection
REF601 IEC
Product Version: 1.0
Protection functions
Three-phase non-directional overcurrent protection
Low-set stage I > Setting range of pick-up
current
Setting range of time multipler
' k '
Operate time at DT mode t >
Inverse time characteristics
Accuracy of pick-up current
Accuracy of operate time
DMT and RI characteristic
IDMT characteristic
Reset ratio
High-set stage I >> Setting range of pick-up
current
Operation mode
Operate time t >>
Accuracy of pick-up current
Accuracy of operate time
Reset ratio
Very High-set stage Setting range of pick-up
I >>> current
Operation mode
Operate time t >>>
Accuracy of pick-up current
Accuracy of operate time
Reset ratio
1MDB07207-YN C
0.2...1 x In in step of 0.025, infinite
0.1...1.6, in step of 0.1
0.1...1.6 sec in steps of 0.1 for B=1
0.5...8.0 sec in steps of 0.5 for B=5
IEC 60255-3:
Normal inverse, Extremely inverse,
Very inverse, Long time inverse
Special curves:
RI inverse time
± 5% of set value
± 5% of set value or ± 30 msec
class E(5) or ± 30 msec
IDMT : 0.96 and DT : 0.98
1.0...2.75 x In in step of 0.25, infinite
Definite time
0.1...0.45 in step of 0.05
± 5% of set value
± 5% of set value or ± 30 msec
0.98
2.0...15 x In in step of 1.0, infinite
Instantaneous
30 msec
± 5% of set value
± 15 msec
0.98
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