ABB REG316 4 Series Operating Instructions Manual page 646

ABB Switzerland Ltd
Utility Automation
Technical Data Func-
Technical Data Func-
tions (cont'd)
tions (cont'd)
Numerical generator protection
Table 19: Instantaneous overcurrent (50)
Features:
· Maximum or minimum function (over- and undercurrent)
· Single- or three-phase measurements
· Wide frequency range (0.04 to 1.2 f
· Peak value evaluation
Settings:
Current
Delay
Accuracy of pick-up value (at 0.08 to 1.1 f
Reset ratio
Max. trip time with no delay (at f
Table 20: Voltage-controlled overcurrent (51-27)
Features:
· Maximum current value memorized after start
· Reset of function after voltage return or after trip
· Single- or three-phase measurement for current
· Positive-sequence voltage evaluation
Settings:
Current
Voltage
Delay
Hold time
Accuracy of pick-up value
Reset ratio
Starting time
Table 21: Inverse time-overcurrent function (51)
· Single or three-phase measurement with detection of the highest phase current
· Stable response to transients
Inverse time characteristic
(acc. to B.S. 142 with extended setting range)
normal inverse
very inverse
extremely inverse
long time inverse
or RXIDG characteristic
Settings:
Number of phases
Base current I
B
Pick-up current I
start
Min. time setting t
min
k setting
1
Accuracy classes for the operating time
according to BritishStandard 142
RXIDG characteristic
Reset ratio
)
N
0.1 to 20 I in steps of 0.1 I
N
0 to 60 s in steps of 0.01 s
) ±5% or ±0.02 I
N
>90% (for max. function)
<110% (for min. function)
) £30 ms (for max. function)
N
£60 ms (for min. function)
0.5 to 20 I in steps of 0.1 I
N
0.4 to 1.1 U
N
0.5 to 60 s in steps of 0.01 s
0.1 to 10 s in steps of 0.02 s
±5% (at f )
N
>94%
£80 ms
C
t = k / ((I/I )
1 B
c = 0.02
c = 1
c = 2
c = 1
t = 5.8 - 1.35 · In (I/I
1 or 3
0.04 to 2.5 I
N
1 to 4 I in steps of 0.01 I
B
0 to 10 s in steps of 0.1 s
0.01 to 200 s in steps of 0.01 s
E 5.0
±4% (1 - I/80 I
>94 %
REG316*4
1MRK502004-Ben
N
N
N
in steps of 0.01 U
N
- 1)
)
B
in steps of 0.01 I
N
B
)
B
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