ABB RELION 630 Series Product Manual page 39

Generator Protection and Control
REG630
Product version: 1.3
Table 66. Negative-sequence overvoltage protection (NSPTOV)
Characteristic
Operation accuracy
1)2)
Start time
Reset time
Reset ratio
Retardation time
Operate time accuracy in definite time mode
Suppression of harmonics
1) Negative-sequence voltage before fault = 0.0 × U
2) Includes the delay of the signal output contact
Table 67. Negative-sequence overvoltage protection (NSPTOV) main settings
Parameter
Start value
Operate delay time
Table 68. Residual overvoltage protection (ROVPTOV)
Characteristic
Operation accuracy
1)2)
Start time
Reset time
Reset ratio
Retardation time
Operate time accuracy in definite time mode
Suppression of harmonics
1) Residual voltage before fault = 0.0 × U
2) Includes the delay of the signal output contact
Table 69. Residual overvoltage protection (ROVPTOV) main settings
Parameter
Start value
Operate delay time
ABB
U = 1.1 × set Start value
Fault
Start value
U = 2.0 × set
Fault
, f = 50 Hz, negative-sequence overvoltage of nominal frequency injected from random phase angle
n n
Function
NSPTOV
NSPTOV
Start value
U = 1.1 × set
Fault
, f = 50 Hz, residual voltage with nominal frequency injected from random phase angle
n n
Function
ROVPTOV
ROVPTOV
Value
At the frequency f = f
n
±1.5% of the set value or ±0.002 × U
Typically 29 ms (± 15ms)
Typically 24 ms (± 15ms)
<40 ms
Typically 0.96
<35 ms
±1.0% of the set value or ±20 ms
DFT: -50 dB at f = n × f , where n = 2, 3, 4, 5,...
n
Value (Range)
0.010...1.000 pu
0.040...120.000 s
Value
At the frequency f = f
n
±1.5% of the set value or ±0.002 × U
Typically 27 ms (± 15 ms)
<40 ms
Typically 0.96
<35 ms
±1.0% of the set value or ±20 ms
DFT: -50 dB at f = n × f , where n = 2, 3, 4, 5,...
n
Value (Range)
0.010...1.000 pu
0.040...300.000 s
1MRS757583 C
n
Step
0.001
0.001
n
Step
0.001
0.001
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