ABB REM630 Product Manual page 45

ABB
Motor Protection and Control
REM630
Product version: 1.1
Table 66. 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
random phase angle
2) Includes the delay of the signal output contact
Table 67. Residual overvoltage protection (ROVPTOV) main settings
Parameter
Start value
Operate delay time
Table 68. Frequency gradient protection (DAPFRC)
Characteristic
Operation accuracy
1)2)
Start time
Reset time
Operate time accuracy in definite time mode
Suppression of harmonics
1) Frequency before fault = 1.0 × f
2) Includes the delay of the signal output contact
U = 1.1 x set
Fault
Start value
, f = 50 Hz, residual voltage with nominal frequency injected from
n n
Function
ROVPTOV
ROVPTOV
Start value = 0.05 Hz/
s
df/dt = ±1.0 Hz/s
FAULT
, f = 50 Hz
n n
Value
At the frequency f = f
n
±1.5% of the set value or ±0.002 × U
Typical 27 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 × f
n
...
Value (Range)
0.010...1.000 pu
0.040...300.000 s
Value
df/dt < ± 10 Hz/s: ±10 mHz/s
Undervoltage blocking: ±1.5% of the set
value or ±0.002 × U
n
Typical 110 ms (±15 ms)
< 150 ms
±1.0% of the set value or ±30 ms
DFT: -50 dB at f = n × f
n
...
1MRS756977 D
Issued: 2011-05-18
n
, where n = 2, 3, 4, 5,
Step
0.001
0.001
, where n = 2, 3, 4, 5,
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