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...
Generator and Interconnection Protection
1MRS758279 B
REG615
Product version: 5.0 FP1
50
ABB
Содержание RELION REG615
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