Table 73. Negative-sequence overcurrent protection (NSPTOC) main settings
Parameter Function Value (Range) Step
Start value NSPTOC 0.01...5.00 × I
n
0.01
Time multiplier NSPTOC 0.025...15.000 0.005
Operate delay time NSPTOC 40...200000 ms 10
Operating curve type
1)
NSPTOC Definite or inverse time
Curve type: 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 17, 18, 19
1) For further reference, see the Operation characteristics table
Table 74. Phase discontinuity protection (PDNSPTOC)
Characteristic
Value
Operation accuracy Depending on the frequency of the measured current: f
n
±2 Hz
±2% of the set value
Start time <70 ms
Reset time Typically 40 ms
Reset ratio Typically 0.96
Retardation time <35 ms
Operate time accuracy in definite time mode ±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,…
Table 75. Phase discontinuity protection (PDNSPTOC) main settings
Parameter
Function Value (Range) Step
Start value PDNSPTOC 10...100% 1
Operate delay time PDNSPTOC 100...30000 ms 1
Min phase current PDNSPTOC 0.05...0.30 × I
n
0.01
Table 76. Residual overvoltage protection (ROVPTOV)
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
= 2 × set
Start value
48 ms 51 ms 54 ms
Reset time Typically 40 ms
Reset ratio Typically 0.96
Retardation time <35 ms
Operate time accuracy in definite time mode ±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) Residual voltage before fault = 0.0 × U
n
, f
n
= 50 Hz, residual voltage 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
1MRS759144 A
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