ABB REM630 Product Manual page 43

ABB
Motor Protection and Control
REM630
Product version: 1.1
Table 62. Positive-sequence undervoltage protection (PSPTUV)
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 = 1.1 × U
random phase angle
2) Includes the delay of the signal output contact
Table 63. Positive-sequence undervoltage protection (PSPTUV) main settings
Parameter
Start value
Operate delay time
Voltage block value
U = 0.9 x set Start
Fault
value
, f = 50 Hz, residual voltage with nominal frequency injected from
n n
Function
PSPTUV
PSPTUV
PSPTUV
Value
At the frequency f = f
n
±1.5% of the set value or ±0.002 × U
Typical 28 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...1.200 pu
0.040...120.000 s
0.01...1.0 pu
1MRS756977 D
Issued: 2011-05-18
n
, where n = 2, 3, 4, 5,
Step
0.001
0.001
0.01
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