ABB REF615 ANSI 5.0 FP1 Product Manual page 56

56 R E F 6 1 5 A N S I 5 . 0 F P 1 F E E D E R P R OT E C T I O N A N D C O N T R O L
Interconnection functions
—
Table 86. Directional reactive power undervoltage protection (DQPTUV )
Characteristic
Operation accuracy
Start time
1) 2)
Reset time
Reset ratio
Suppression of harmonics
1) Start value = 0.05 × S , reactive power before fault = 0.8 × Start value , reactive power overshoot 2 times, results based on statistical distribution of 1000 measurements
n
2) Includes the delay of the signal output contact
—
Table 87. Directional reactive power undervoltage protection (DQPTUV) main settings
Parameter
Voltage start value
Operate delay time
Min reactive power
Min Ps Seq current
Pwr sector reduction
—
Table 88. Low-voltage ride-through protection (LVRTPTUV)
Characteristic
Operation accuracy
Start time
1) 2)
Reset time
Operate time accuracy
Suppression of harmonics
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
Value
Depending on the frequency of the measured current and voltage:
f ±2 Hz
n
Reactive power range |PF| <0.71
Power:
±3.0% or ±0.002 × Q
Voltage:
±1.5% of the set value or ±0.002 × U
Typically 46 ms
< 50 ms
Typically 0.96
DFT: -50 dB at f = n × f
Function
DQPTUV
DQPTUV
DQPTUV
DQPTUV
DQPTUV
Value
Depending on the frequency of the measured voltage:
f ±2 Hz
n
±1.5% of the set value or ±0.002 × U
Typically 40 ms
Based on maximum value of Recovery time setting
±1.0% of the set value or ±20 ms
DFT: -50 dB at f = n × f
n
n
, where n = 2, 3, 4, 5,...
n
Value (range)
0.20...1.20 × U
n
100...300000 ms
0.01...0.50 × S
n
0.02...0.20 × I
n
0...10°
n
, where n = 2, 3, 4, 5,...
n
Step
0.01
10
0.01
0.01
1