Arc Protection
Setting Values
Threshold I> 1 A @ 100 Irated 0.030 A to 35.000 A Increments of 0.001 A
5 A @ 100 Irated 0.15 A to 175.00 A Increments of 0.01 A
Threshold 3I0>> 1 A @ 100 Irated 0.030 A to 35.000 A Increments of 0.001 A
5 A @ 100 Irated 0.15 A to 175.00 A Increments of 0.01 A
External trip initiation no
current
light
Operating mode light only
current and light
Sensor point sensor
line sensor
custom
Threshold light -28.00 dB to 0.00 dB Increments of 0.01
Channel Possible settings, application-dependent
Dropout
The larger dropout differential (= | pickup threshold – dropout threshold |) of the following 2
criteria is used:
Dropout differential derived from the parameter
Dropout ratio
If this parameter is not available, a dropout ratio of 90 % applies to the current threshold values.
Minimum absolute dropout differential
Protection-class current transformers 15 mA sec. (I
rated
= 1 A) or
75 mA sec. (I
rated
= 5 A)
Instrument transformers 0.5 mA sec. (I
rated
= 1 A) or
2.5 mA sec. (I
rated
= 5 A)
Times
Shortest operate time
Operating mode = light only
Approx. 2.6 ms + OOT
71
Shortest operate time
Operating mode = Current and light
Approx. 4.0 ms + OOT at 50 Hz
Approx. 3.8 ms + OOT at 60 Hz
11.28
71
OOT (Output Operating Time): Additional delay of the output medium used, for example, 5 ms with fast relay, see chapter
11.1.4 Relay Outputs
Technical Data
11.28 Arc Protection
978 SIPROTEC 5, Low-Impedance Busbar Protection, Manual
C53000-G5040-C019-C, Edition 04.2021
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