
Table 125. 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 126. Third harmonic-based stator earth-fault protection (H3EFPSEF)
Characteristic
Value
Operation accuracy
Depending on the frequency of the measured voltage:
f
n
±2 Hz
±5% of the set value or ±0.004 × U
n
Start time
1)2)
Typically 35 ms
Reset time
Typically 35 ms
Reset ratio
Typically 0.96 (differential mode)
Typically 1.04 (undervoltage mode)
Operate time accuracy
±1.0% of the set value of ±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 127. Third harmonic-based stator earth-fault protection (H3EFPSEF) main settings
Parameter
Function
Value (Range)
Step
Beta
H3EFPSEF
0.50...10.00
0.01
Voltage N 3.H Lim
H3EFPSEF
0.005...0.200 × U
n
0.001
Operate delay time
H3EFPSEF
20...300000 ms
10
Voltage selection
H3EFPSEF
1 = No voltage
2 = Uo
4 = Phase A
5 = Phase B
6 = Phase C
-
CB open factor
H3EFPSEF
1.00...10.00
0.01
1MRS759144 A
REX640
Product version: 1
ABB
69
Содержание RELION REX640
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