Table 72. 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 = Measured Uo
3 = Calculated Uo
4 = Phase A
5 = Phase B
6 = Phase C
-
CB open factor
H3EFPSEF
1.00...10.00
0.01
Table 73. Underpower protection (DUPPDPR)
Characteristic
Value
Operation accuracy
1)
Depending on the frequency of the measured current and voltage:
f
n
±2 Hz
Power measurement accuracy ±3% of the set value or ±0.002 × S
n
Phase angle: ±2°
Start time
2)3)
Typically 45 ms
Reset time
Typically 30 ms
Reset ratio
Typically 1.04
Operate time accuracy
±1.0% of the set value of ±20 ms
Suppression of harmonics
-50 dB at f = n × f
n
, where n = 2, 3, 4, 5,…
1)
Measurement mode = “Pos Seq” (default)
2)
U = U
n
, f
n
= 50 Hz, results based on statistical distribution of 1000 measurements
3)
Includes the delay of the signal output contact
Table 74. Underpower protection (DUPPDPR) main settings
Parameter
Function
Value (Range)
Step
Start value
DUPPDPR
0.01...2.00 × S
n
0.01
Operate delay time
DUPPDPR
40...300000 ms
10
Pol reversal
DUPPDPR
0 = False
1 = True
-
Disable time
DUPPDPR
0...60000 ms
1000
Generator and Interconnection Protection
1MRS758279 B
REG615
Product version: 5.0 FP1
48
ABB
