Three-Phase Underimpedance Protection - ABB REG615 Product Manual

Generator and Interconnection Protection
REG615
Product version: 5.0 FP1
Table 78. Three-phase underexcitation protection (UEXPDIS) main settings
Parameter
Diameter
Offset
Displacement
Operate delay time
External Los Det Ena
Table 79. Three-phase underimpedance protection (UZPDIS)
Characteristic
Operation accuracy
Start time 1)2)
Reset time
Reset ratio
Retardation time
Operate time accuracy
1) f = 50 Hz, results based on statistical distribution of 1000 measurements
n
2) Includes the delay of the signal output contact
Table 80. Three-phase underimpedance protection (UZPDIS) main settings
Parameter
Percentage reach
Operate delay time
Table 81. Out-of-step protection OOSRPSB
Characteristic
Impedance reach
Reset time
Operate time accuracy
Suppression of harmonics
50
Function
UEXPDIS
UEXPDIS
UEXPDIS
UEXPDIS
UEXPDIS
Function
UZPDIS
UZPDIS
Value (Range)
1...6000 %Z
n
-1000...1000 %Z
n
-1000...1000 %Z
n
60...200000 ms
0 = Disable
1 = Enable
Value
Depending on the frequency of the measured current and voltage: f
Hz
±3.0% of the set value or ±0.2 %Zb
Typically 50 ms
Typically 40 ms
Typically 1.04
<40 ms
±1.0% of the set value or ±20 ms
Value (Range)
1...6000% Z
n
40...200000 ms
Value
Depending on the frequency of the measured current and voltage: f
Hz
±3.0% of the reach value or ±0.2% of U
±1.0% of the set value or ±40 ms
±1.0% of the set value or ±20 ms
DFT: -50 dB at f = n × f , where n = 2, 3, 4, 5...
n
1MRS758279 B
Step
1
1
1
10
-
Step
1
10
/(√3 ⋅ I )
n n
±2
n
±2
n
ABB