ABB RELION 630 Series Product Manual page 42

Generator Protection and Control
REG630
Product version: 1.3
Table 78. Overfrequency protection (DAPTOF)
Characteristic
Operation accuracy
Start time 1)2)
Reset time
Operate time accuracy in definite time mode
Suppression of harmonics
1) Frequency before fault = 0.99 × f
n
2) Includes the delay of the signal output contact
Table 79. Overfrequency protection (DAPTOF) main settings
Parameter
Start value
Operate delay time
Table 80. Underfrequency protection (DAPTUF)
Characteristic
Operation accuracy
1)2)
Start time
Reset time
Operate time accuracy in definite time mode
Suppression of harmonics
1) Frequency before fault = 1.01 × f
n
2) Includes the delay of the signal output contact
Table 81. Underfrequency protection (DAPTUF) main settings
Parameter
Start value
Operate delay time
Table 82. Low voltage ride through protection function (LVRTPTUV)
Characteristic
Operation accuracy
Start time
Reset time
Operate time accuracy in definite time mode
Suppression of harmonics
42
f = 1.01 × set Start value
Fault
, f = 50 Hz
n
Function
DAPTOF
DAPTOF
Start value
f = 0.99 × set
Fault
, f = 50 Hz
n
Function
DAPTUF
DAPTUF
Value
At the frequency f = 35...66 Hz
±0.003 Hz
Typically <190 ms
<190 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)
35.0...64.0 Hz
0.170...60.000 s
Value
At the frequency f = 35...66 Hz
±0.003 Hz
Typically <190 ms
<190 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)
35.0...64.0 Hz
0.170...60.000 s
Value
At the frequency f = f
n
±1.5% of the set value or ±0.002 × U
Typically 40 ms
Recovery time setting
Based on maximum value of
±1.0% of the set value or ±40 ms
DFT: -50 dB at f = n × f , where n = 2, 3, 4, 5 and so on
n
1MRS757583 C
Step
0.1
0.001
Step
0.1
0.001
n
ABB