ABB REX640 - Three-Phase Underexcitation Protection (UEXPDIS) Main Settings; Third Harmonic-Based Stator Earth-Fault Protection (H3 EFPSEF)

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