ABB REM630 Product Manual page 44

Motor Protection and Control
REM630
Product version: 1.1
Table 64. 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) Residual voltage before fault = 0.0 × U
random phase angle
2) Includes the delay of the signal output contact
Table 65. Negative-sequence overvoltage protection (NSPTOV) main settings
Parameter
Start value
Operate delay time
44
U = 1.1 x set
Fault
Start value
U = 2.0 x set
Fault
Start value
, f = 50 Hz, residual overvoltage with nominal frequency injected from
n n
Function
NSPTOV
NSPTOV
Value
At the frequency f = f
n
±1.5% of the set value or ±0.002 × U
Typical 29 ms (± 15ms)
Typical 24 ms (± 15ms)
< 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...120.000 s
1MRS756977 D
Issued: 2011-05-18
n
, where n = 2, 3, 4, 5,
Step
0.001
0.001
ABB