ABB REG316 4 Series Operating Instructions Manual page 643

ABB Switzerland Ltd
Utility Automation
Numerical generator protection
Table 13: Directional definite time overcurrent protection (67)
· Directional overcurrent protection with detection of the power direction
· Backup protection for distance protection scheme
· Three-phase measurement
· Suppression of DC- and high-frequency components
· Definite time characteristic
· Voltage memory feature for close faults
Settings:
Current
Angle
Delay
tWait
Memory duration
Accuracy of pick-up setting (at f
Reset ratio
Accuracy of angle measurement
(at 0.94 to 1.06 f )
N
Voltage input range
Voltage memory range
Accuracy of angle measurement at voltage mem-
ory
Frequency dependence of angle measurement
at voltage memory
Max. Response time without delay
Table 14: Directional inverse time overcurrent function (67)
· Directional overcurrent protection with detection of the power direction
· Backup protection for distance protection scheme
· Three-phase measurement
· Suppression of DC- and high-frequency components
· Inverse time characteristic
· Voltage memory feature for close faults
Settings:
Current I-
Start
Angle
Inverse time characteristic
(acc. to B.S. 142 with extended setting range)
normal inverse
very inverse
extremely inverse
long-time earth fault
k -setting
1
t-min
IB-value
tWait
0.02 to 20 I
-180° to +180° in steps of 15°
0.02 s to 60 s in steps of 0.01 s
0.02 s to 20 s in steps of 0.01 s
0.2 s to 60 s in steps of 0.01 s
) ±5% or ±0.02 I
N
>94%
±5°
0.005 to 2 U
<0.005 U
N
±20°
±0.5°/Hz
60 ms
1...4 I
B
-180°...+180° in steps of 15°
t = k / ((I/I
1
c = 0,02
c = 1
c = 2
c = 1
0.01 to 200 s in steps of 0.01 s
0 to 10 s in steps of 0.1 s
0.04 to 2.5 I
0.02 s to 20 s in steps of 0.01 s
REG316*4
1MRK502004-Ben
in steps of 0.01 I
N N
N
N
in steps of 0.01 I
B
C
) - 1)
B
in steps of 0.01 I
N N
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