Seg WI Series - Page 216

• either: minimum current in 3 phases > 0.5⋅In
min
for at least 0.5 s,•
•
or: externally supplied (only WIC1‑4).
•
*2)
While being CT-supplied, the start times might be longer because the WIC1 has to collect
enough electrical energy for a trip pulse.
*3)
if the protection stage is used together with Inrush Blocking it is necessary to set the
tripping delay to at least 30 ms.
*4)
The calculated ground current values are released if there is at least 0.25⋅In
min
in all 3
phases or at least 0.35⋅In
min
in one phase, otherwise the value is assumed as 0.
216 WIC1 WIC1-1.0-EN-MAN
9 Technical Data
9.2.1.2 Ground (Earth) Overcurrent Protection