ABB REM630 - Page 46

Table 69. Frequency gradient protection (DAPFRC) main settings
Parameter Function Value (Range) Step
Start value DAPFRC -10.00...10.00 Hz/s 0.01
Operate delay time DAPFRC 0.120...60.000 s 0.001
Table 70. Overfrequency protection (DAPTOF)
Characteristic Value
Operation accuracy At the frequency f = 35 to 66 Hz
± 0.003 Hz
Start time
1)2)
f
Fault
= 1.01 × set
Start value
Typical < 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 71. 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 72. Underfrequency protection (DAPTUF)
Characteristic
Value
Operation accuracy At the frequency f = 35 to 66 Hz
± 0.003 Hz
Start time
1)2)
f
Fault
= 0.99 × set
Start value
Typical < 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
Motor Protection and Control 1MRS756977 D
REM630
Product version: 1.1 Issued: 2011-05-18
46 ABB