Table 81. Low-voltage ride-through protection (LVRTPTUV)
Characteristic Value
Operation accuracy Depending on the frequency of the measured
voltage: fn ±2 Hz
±1.5% of the set value or ±0.002 × Un
Start time
64, 65
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 × fn, where n = 2, 3, 4, 5,…
Table 82. Low-voltage ride-through protection (LVRTPTUV) main settings
Parameter Function Value (Range) Step
Voltage start value LVRTPTUV 0.05...1.20 × Un 0.01
Num of start phases LVRTPTUV 4 = Exactly 1 of 3
5 = Exactly 2 of 3
6 = Exactly 3 of 3"
-
Voltage selection LVRTPTUV 1 = Highest Ph-to-E
2 = Lowest Ph-to-E
3 = Highest Ph-to-Ph
4 = Lowest Ph-to-Ph
5 = Positive Seq
-
Active coordinates LVRTPTUV 1...10 1
Voltage level 1 LVRTPTUV 0.00...1.20 ms 0.01
Voltage level 2 LVRTPTUV 0.00...1.20 ms 0.01
Voltage level 3 LVRTPTUV 0.00...1.20 ms 0.01
Voltage level 4 LVRTPTUV 0.00...1.20 ms 0.01
Voltage level 5 LVRTPTUV 0.00...1.20 ms 0.01
Voltage level 6 LVRTPTUV 0.00...1.20 ms 0.01
Voltage level 7 LVRTPTUV 0.00...1.20 ms 0.01
Voltage level 8 LVRTPTUV 0.00...1.20 ms 0.01
Voltage level 9 LVRTPTUV 0.00...1.20 ms 0.01
Voltage level 10 LVRTPTUV 0.00...1.20 ms 0.01
Recovery time 1 LVRTPTUV 0...300000 ms 1
Recovery time 2 LVRTPTUV 0...300000 ms 1
Recovery time 3 LVRTPTUV 0...300000 ms 1
Recovery time 4 LVRTPTUV 0...300000 ms 1
Recovery time 5 LVRTPTUV 0...300000 ms 1
Recovery time 6 LVRTPTUV 0...300000 ms 1
Recovery time 7 LVRTPTUV 0...300000 ms 1
Recovery time 8 LVRTPTUV 0...300000 ms 1
Recovery time 9 LVRTPTUV 0...300000 ms 1
Recovery time 10 LVRTPTUV 0...300000 ms 1
17. Power quality functions
Table 83. Voltage variation (PHQVVR)
Characteristic Value
Operation accuracy ±1.5% of the set value or ±0.2% of reference voltage
Reset ratio Typically 0.96 (Swell), 1.04 (Dip, Interruption)
Table 84. Voltage unbalance (VSQVUB)
Characteristic Value
Operation accuracy ±1.5% of the set value or ±0.002 × Un
Reset ratio Typically 0.96
64 Tested for Number of Start phases = 1 out of 3, results based on statistical distribution of 1000 measurements
65 Includes the delay of the signal output contact
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