Interconnection functions
Table 84. Directional reactive power undervoltage protection (DQPTUV )
Characteristic
Value
Operation accuracy
Depending on the frequency of the measured current and voltage:
f
n
±2 Hz
Reactive power range |PF| <0.71
Power:
±3.0% or ±0.002 × Q
n
Voltage:
±1.5% of the set value or ±0.002 × U
n
Start time
1)2)
Typically 46 ms
Reset time
<50 ms
Reset ratio
Typically 0.96
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,…
1)
Start value = 0.05 × S
n
, reactive power before fault = 0.8 ×
Start value, reactive power overshoot 2 times, results based on statistical distribution of 1000 measurements
2)
Includes the delay of the signal output contact
Table 85. Directional reactive power undervoltage protection (DQPTUV) main settings
Parameter
Function
Value (Range)
Step
Voltage start value
DQPTUV
0.20...1.20 × U
n
0.01
Operate delay time
DQPTUV
100...300000 ms
10
Min reactive power
DQPTUV
0.01...0.50 × S
n
0.01
Min Ps Seq current
DQPTUV
0.02...0.20 × I
n
0.01
Pwr sector reduction
DQPTUV
0...10°
1
Table 86. Low-voltage ride-through protection (LVRTPTUV)
Characteristic
Value
Operation accuracy
Depending on the frequency of the measured voltage:
f
n
±2 Hz
±1.5% of the set value or ±0.002 × U
n
Start time
1)2)
Typically 40 ms
Reset time
Based on maximum value of
Recovery time setting
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,…
1)
Tested for
Number of Start phases = 1 out of 3, results based on statistical distribution of 1000 measurements
2)
Includes the delay of the signal output contact
Generator and Interconnection Protection
1MRS758279 B
REG615
Product version: 5.0 FP1
52
ABB
