Table 24. Transient/intermittent earth-fault protection (INTRPTEF)
Characteristic Value
Operation accuracy (Uo criteria with transient protection) Depending on the frequency of the measured current: fn ±2 Hz
±1.5% of the set value or ±0.002 × Uo
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 25. Transient/intermittent earth-fault protection (INTRPTEF) main settings
Parameter Function Value (Range) Step
Directional mode INTRPTEF 1 = Non-directional
2 = Forward
3 = Reverse
-
Operate delay time INTRPTEF 40...1200000 ms 10
Voltage start value INTRPTEF 0.05...0.50 × Un 0.01
Operation mode INTRPTEF 1 = Intermittent EF
2 = Transient EF
-
Peak counter limit INTRPTEF 2...20 1
Min operate current INTRPTEF 0.01...1.00 × In 0.01
Table 26. Negative-sequence overcurrent protection (NSPTOC)
Characteristic Value
Operation accuracy Depending on the frequency of the measured current: fn
±1.5% of the set value or ±0.002 × In
Start time
22, 23
IFault = 2 × set Start value
IFault = 10 × set Start value
Minimum Typical Maximum
24 ms
15 ms
27 ms
18 ms
29 ms
20 ms
Reset time Typically 40 ms
Reset ratio Typically 0.96
Retardation time <35 ms
Operate time accuracy in denite 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
24
Suppression of harmonics DFT: -50 dB at f = n × fn, where n = 2, 3, 4, 5,…
Table 27. Negative-sequence overcurrent protection (NSPTOC) main settings
Parameter Function Value (Range) Step
Start value NSPTOC 0.01...5.00 × In 0.01
Time multiplier NSPTOC 0.05...15.00 0.01
Operate delay time NSPTOC 40...200000 ms 10
Operating curve type
25
NSPTOC Denite or inverse time
Curve type: 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 17, 18, 19
Table 28. Phase discontinuity protection (PDNSPTOC)
Characteristic Value
Operation accuracy Depending on the frequency of the measured current: fn ±2 Hz
Start time <70 ms
Reset time Typically 40 ms
Reset ratio Typically 0.96
Retardation time <35 ms
Operate time accuracy in denite time mode ±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,…
22 Negative sequence current before fault = 0.0, fn = 50 Hz, results based on statistical distribution of 1000 measurements
23 Includes the delay of the signal output contact
24 Maximum Start value = 2.5 × In, Start value multiples in range of 1.5...20
25 For further reference, see the Operation characteristics table
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