Three-Phase Underexcitation Protection (Uexpdis) Main Settings; Third Harmonic-Based Stator Earth-Fault Protection (H3Efpsef) - ABB REX640 Product Manual

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