Table 73. 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 74. Three-phase underexcitation protection (UEXPDIS)
Characteristic Value
Operation accuracy
1)
Depending on the frequency of the current
and voltage measured, f=fn ± 2 Hz
±3.0% of the set value or ±0.2 %Zb
Start time
2)3)
Typical 45 ms (±15ms)
Reset time < 50 ms
Reset ratio Typical 1.04
Retardation time Total retardation time when the impedance
returns from the operating circle < 40 ms
Operate time accuracy in definite-time mode ±1.0% of the set value of ±20 ms
1) Adaptive DFT measurement used.
2) fn = 50Hz, results based on statistical distribution of 1000 measurements.
3) Includes the delay of the signal output contact.
Table 75. Three-phase underexcitation protection (UEXPDIS) main settings
Parameter
Function Values (Range) Step
External Los Det Ena UEXPDIS 0-1 1
Diameter UEXPDIS 1 - 6000 1
Offset UEXPDIS -1000 - 1000 1
Displacement UEXPDIS -1000 - 1000 1
Operate delay time UEXPDIS 0.06 - 200.00 0.01
Motor Protection and Control 1MRS756977 D
REM630
Product version: 1.1 Issued: 2011-05-18
ABB 47
To Next Page
Loading...
