Table 78. Three-phase underexcitation protection (UEXPDIS) main settings
Parameter Function Value (Range) Step
Diameter UEXPDIS 1...6000 %Z
n
1
Offset UEXPDIS -1000...1000 %Z
n
1
Displacement UEXPDIS -1000...1000 %Z
n
1
Operate delay time UEXPDIS 60...200000 ms 10
External Los Det Ena UEXPDIS 0 = Disable
1 = Enable
-
Table 79. Three-phase underimpedance protection (UZPDIS)
Characteristic
Value
Operation accuracy Depending on the frequency of the measured current and voltage: f
n
±2
Hz
±3.0% of the set value or ±0.2 %Zb
Start time
1)2)
Typically 50 ms
Reset time Typically 40 ms
Reset ratio Typically 1.04
Retardation time <40 ms
Operate time accuracy ±1.0% of the set value or ±20 ms
1) f
n
= 50 Hz, results based on statistical distribution of 1000 measurements
2) Includes the delay of the signal output contact
Table 80. Three-phase underimpedance protection (UZPDIS) main settings
Parameter
Function Value (Range) Step
Percentage reach UZPDIS 1...6000% Z
n
1
Operate delay time UZPDIS 40...200000 ms 10
Table 81. Out-of-step protection OOSRPSB
Characteristic
Value
Impedance reach Depending on the frequency of the measured current and voltage: f
n
±2
Hz
±3.0% of the reach value or ±0.2% of U
n
/(√3 ⋅ I
n
)
Reset time ±1.0% of the set value or ±40 ms
Operate time accuracy ±1.0% of the set value or ±20 ms
Suppression of harmonics DFT: -50 dB at f = n × f
n
, where n = 2, 3, 4, 5...
To Next Page
Loading...
