Table 81. Three-phase overvoltage variation protection (PHVPTOV) main settings
Parameter Function Value (Range) Step
Start value PHVPTOV 0.05...3.00 × U
n
0.01
Time interval PHVPTOV 1...120 min 1
Num of start phases PHVPTOV 1 = 1 out of 3
2 = 2 out of 3
3 = 3 out of 3
-
Voltage selection PHVPTOV 1 = phase-to-earth
2 = phase-to-phase
-
Table 82. Three-phase overvoltage protection (PHPTOV)
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)
Minimum Typical Maximum
U
Fault
= 1.1 × set
Start value
23 ms 27 ms 31 ms
Reset time Typically 40 ms
Reset ratio Depends on the set
Relative hysteresis
Retardation time <35 ms
Operate time accuracy in definite time mode ±1.0% of the set value or ±20 ms
Operate time accuracy in inverse time mode
±5.0% of the theoretical value or ±20 ms
3)
Suppression of harmonics DFT: -50 dB at f = n × f
n
, where n = 2, 3, 4, 5,…
1)
Start value
= 1.0 × U
n
, Voltage before fault = 0.9 × U
n
, f
n
= 50 Hz, overvoltage in one phase-to-phase with nominal frequency injected from random phase angle, results based on statistical
distribution of 1000 measurements
2) Includes the delay of the signal output contact
3) Maximum
Start value
= 1.20 × U
n
,
Start value
multiples in range of 1.10...2.00
Table 83. Three-phase overvoltage protection (PHPTOV) main settings
Parameter
Function Value (Range) Step
Start value PHPTOV 0.05...1.60 × U
n
0.01
Time multiplier PHPTOV 0.025...15.000 0.005
Operate delay time PHPTOV 40...300000 ms 10
Operating curve type
1)
PHPTOV Definite or inverse time
Curve type: 5, 15, 17, 18, 19, 20
1) For further reference, see the Operation characteristics table
1MRS759144 A
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