Siemens SIPROTEC 5 Technical Data Manual page 58

Additional time delay
[dwloginv-300913, 3, en_US]
Figure 11-13
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
Instrument current transformer
Times
The maximum pickup time with operate delay = 0 ms Approx. 30 ms + OOT at 50 Hz
Extension of the operate time during operation with
inrush-current detection
Dropout time
Frequency Operating Range
0.9 ≤ f/f ≤ 1.1
rated
SIPROTEC 5, High-Voltage Bay Controller, Manual
C53000-G5040-C015-A, Edition 05.2018
Operate Curve of Logarithmic Inverse-Time Characteristic
11.11 Directional Overcurrent Protection, Ground
0.000 s to 60.000 s
15 mA sec. (I = 1 A) or
rated
75 mA sec. (I = 5 A)
rated
0.5 mA sec. (I = 1 A) or
rated
2.5 mA sec. (I = 5 A)
rated
Approx. 25 ms + OOT at 60 Hz
Approx. 10 ms
Approx. 20 ms + OOT
According to specified tolerances
Technical Data
Increments of 0.001 s
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