Seg WIC1-3 User Manual

9.2.1.5 Inrush Blocking
Inrush Blocking IH2 Accuracy
Pickup value »IH2 / IH1«
*6) *7)
for I within the range 0.5 … 2 In
±2% absolute
Blocking of the Inrush Blocking based on a
short-circuit current
Starting threshold »Imax«
*8)
±15% of the setting value
Time limit of the blocking
Timer »IH2 . tmax«
±5% or ±30 ms
*6)
The tripping delay must be at least 30 ms for all overcurrent stages that shall be
stabilized by the Inrush Blocking.
*7)
The measuring value IH2 / IH1 is released under the conditions IH1 > 0,3 In and
IH2 > 0,03 In, otherwise it is assumed as 0.
*8)
If the limit current »Imax« is used then the threshold should be at least 15% below
the current threshold of the protection stage that shall not be blocked in case of a short-
circuit current.
9.2.1.6
Switch Onto Fault (SOTF)
The accuracy and tripping times depend on the protection function that triggers the SOTF.
In case of the smallest possible setting values and SOTF tripping delay »t« = 0 ms, it is
possible to reach the following accuracy for switching onto a 3-pole short-circuit when the
WIC1 is self-powered:
Switch Onto Fault SOTF Accuracy
Tripping delay
»t«
±1% or ±10 ms
Operate time (for
»t« = 0 ms)
at testing current ≥ 5 times minimum
pickup value
(including the duration of a WIC1 restart
in self-powered mode)
<30 ms
15 ms typical
219WIC1WIC1-1.0-EN-MAN
9 Technical Data
9.2.1.5 Inrush Blocking

Seg WIC1-3 Specifications

General

Brand	Seg
Model	WIC1-3
Category	Relays
Language	English