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Table 49. Positive-sequence overvoltage protection (PSPTOV)
Characteristic
Value
Operation accuracy
At the frequency f = f
n
±1.5% of the set value or ±0.002 x U
n
Start time
1)2)
U
Fault
= 1.1 x set
Start value
U
Fault
= 2.0 x set
Start value
Typical: 29 ms (±15 ms)
Typical: 24 ms (±15 ms)
Reset time
< 40 ms
Reset ratio
Typical 0.96
Retardation time
< 35 ms
Operate time accuracy in definite time mode
±1.0% of the set value or ±20 ms
Suppression of harmonics
DFT: -50 dB at f = n x f
n
, where n = 2, 3, 4, 5,
…
1) Residual voltage before fault = 0.0 x U
n
, f
n
= 50 Hz, residual voltage with nominal frequency injected from
random phase angle
2) Includes the delay of the signal output contact
Table 50. Positive-sequence overvoltage protection (PSPTOV) main settings
Parameter
Function
Value (Range)
Step
Start value
PSPTOV
0.800...1.600 pu
0.001
Operate delay time
PSPTOV
0.040...120.000 s
0.001
Feeder Protection and Control
1MRS756380 A
REF630
Product version: 1.0
Issued: 15.09.2009
40
ABB
Summary of Contents for REF630
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