Inrush-Current Detection
Setting Values
Operat.-range limit Imax 1 A @ 50 and 100 Irated 0.030 A to 35.000 A Increments of 0.001 A
5 A @ 50 and 100 Irated 0.15 A to 175.00 A Increments of 0.01 A
1 A @ 1.6 Irated 0.001 A to 1.600 A Increments of 0.001 A
5 A @ 1.6 Irated 0.005 A to 8.000 A Increments of 0.001 A
Content 2nd harmonic 10 % to 45 % Increments of 1 %
Duration of the crossblock function 0.03 s to 200.00 s Increments of 0.01 s
Times
Pre-arcing times Approx. 29 ms
Dropout Ratios
Harmonic: I
2nd harm
/I
1st harm
0.95
Dropout
The greater dropout differential (= | pickup value – dropout value |) of the following 2 criteria
applies:
Dropout differential derived from the parameter
Dropout ratio
If this parameter is not available, a dropout ratio of 95 % applies for overcurrent and of 105 % for undercur-
rent functionality.
Minimum absolute dropout differential
Protection-class current transformer 15 mA sec. (I
rated
= 1 A) or
75 mA sec. (I
rated
= 5 A)
Instrument current transformer 0.5 mA sec. (I
rated
= 1 A) or
2.5 mA sec. (I
rated
= 5 A)
Frequency Operating Range
0.9 ≤ f/f
rated
≤ 1.1 According to specified tolerances
10 Hz ≤ f < 0.9 f
rated
1.1 f
rated
< f ≤ 80 Hz
Slightly expanded tolerances
f < 10 Hz
f > 80 Hz
Inactive
Tolerances
Current measurement I
max
1 % of the setting value or 5 mA
Harmonic: I
2nd harm
/I
1st harm
1 % of the setting value with setting values
of I
2nd harm
/I
1st harm
Time delays 1 % of the setting value or 10 ms
12.10
Technical Data
12.10 Inrush-Current Detection
1462 SIPROTEC 5, Overcurrent Protection, Manual
C53000-G5040-C017-8, Edition 07.2017
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