ABB REG630 - Page 42

Table 78. Overfrequency protection (DAPTOF)
Characteristic Value
Operation accuracy At the frequency f = 35...66 Hz
±0.003 Hz
Start time
1)2)
f
Fault
= 1.01 × set Start value Typically <190 ms
Reset time <190 ms
Operate time accuracy in definite time mode ±1.0% of the set value or ±30 ms
Suppression of harmonics DFT: -50 dB at f = n × f
n
, where n = 2, 3, 4, 5,…
1) Frequency before fault = 0.99 × f
n
, f
n
= 50 Hz
2) Includes the delay of the signal output contact
Table 79. Overfrequency protection (DAPTOF) main settings
Parameter
Function Value (Range) Step
Start value DAPTOF 35.0...64.0 Hz 0.1
Operate delay time DAPTOF 0.170...60.000 s 0.001
Table 80. Underfrequency protection (DAPTUF)
Characteristic
Value
Operation accuracy At the frequency f = 35...66 Hz
±0.003 Hz
Start time
1)2)
f
Fault
= 0.99 × set Start value Typically <190 ms
Reset time <190 ms
Operate time accuracy in definite time mode ±1.0% of the set value or ±30 ms
Suppression of harmonics DFT: -50 dB at f = n × f
n
, where n = 2, 3, 4, 5,…
1) Frequency before fault = 1.01 × f
n
, f
n
= 50 Hz
2) Includes the delay of the signal output contact
Table 81. Underfrequency protection (DAPTUF) main settings
Parameter
Function Value (Range) Step
Start value DAPTUF 35.0...64.0 Hz 0.1
Operate delay time DAPTUF 0.170...60.000 s 0.001
Table 82. Low voltage ride through protection function (LVRTPTUV)
Characteristic
Value
Operation accuracy At the frequency f = f
n
±1.5% of the set value or ±0.002 × U
n
Start time Typically 40 ms
Reset time Based on maximum value of Recovery time setting
Operate time accuracy in definite time mode ±1.0% of the set value or ±40 ms
Suppression of harmonics DFT: -50 dB at f = n × f
n
, where n = 2, 3, 4, 5 and so on
Generator Protection and Control
1MRS757583 C
REG630
Product version: 1.3
42 ABB