ABB Relion 630 Series RET630 Product Manual page 45

ABB
Transformer Protection and Control
RET630
Product version: 1.1
Table 54. Positive-sequence overvoltage protection (PSPTOV)
Characteristic
Operation accuracy
1)2)
Start time
Reset time
Reset ratio
Retardation time
Operate time accuracy in definite time mode
Suppression of harmonics
1) Positive-sequence voltage before fault = 0.0 x U
injected from random phase angle
2) Includes the delay of the signal output contact
Table 55. Positive-sequence overvoltage protection (PSPTOV) main settings
Parameter
Start value
Operate delay time
U = 1.1 x set
Fault
Start value
U = 2.0 x set
Fault
Start value
, f = 50 Hz, positive-sequence overvoltage of nominal frequency
n n
Function
PSPTOV
PSPTOV
Value
At the frequency f = f
n
±1.5% of the set value or ±0.002 x U
Typical: 29 ms (±15 ms)
Typical: 24 ms (±15 ms)
< 40 ms
Typical 0.96
< 35 ms
±1.0% of the set value or ±20 ms
DFT: -50 dB at f = n x f
n
...
Value (Range)
0.800...1.600 pu
0.040...120.000 s
1MRS756978 D
Issued: 2011-05-18
n
, where n = 2, 3, 4, 5,
Step
0.001
0.001
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