ABB RELION 630 Series Product Manual page 41

Generator Protection and Control
REG630
Product version: 1.3
Table 74. Underpower protection (DUPPDPR)
Characteristic
Operation accuracy
1)2)
Start time
Reset time
Reset ratio
Retardation time
Operate time accuracy
1) U = U , f = 50 Hz, results based on statistical distribution of 1000 measurements.
n n
2) Includes the delay of the signal output contact.
Table 75. Underpower protection (DUPPDPR) main settings
Parameter
Start value
Operate delay time
Disable time
Pol reversal
Table 76. 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
Table 77. Frequency gradient protection (DAPFRC) main settings
Parameter
Start value
Operate delay time
ABB
Function
DUPPDPR
DUPPDPR
DUPPDPR
DUPPDPR
Start value = 0.05 Hz/s
df/dt = ±1.0 Hz/s
FAULT
, f = 50 Hz
n n
Function
DAPFRC
DAPFRC
Value
At the frequency f = f
n
±3% of the set value or ±0.002 × S
Typically 20 ms (±15 ms)
<40 ms
Typically 0.94
<45 ms
±1.0% of the set value of ±20 ms
Value (Range)
0.01...2.00 pu
0.04...300.00 s
0.00...60.00 s
No
Yes
Value
df/dt < ±10 Hz/s: ±10 mHz/s
Undervoltage blocking: ±1.5% of the set value or ±0.002 × U
Typically 110 ms (±15 ms)
<150 ms
±1.0% of the set value or ±30 ms
DFT: -50 dB at f = n × f , where n = 2, 3, 4, 5,...
n
Value (Range)
-10.00...10.00 Hz/s
0.120...60.000 s
1MRS757583 C
n
Step
0.01
0.01
0.01
-
n
Step
0.01
0.001
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