Seg WI Series User Manual

Overcurrent Protection Stages
I>, I>>, I>>>
Inverse-Time / Characteristic curve
Accuracy
Start time (pickup time)
At testing current ≥ 2 times pickup value
<30 ms
*1) *2) *3)
Tripping delay
For testing current in the range 2 … 20
times pickup value
±5% or ±30 ms (according to the selected curve,
see ╚═▷ “11.2.1 Characteristics (I>, I>>, I>>>)”)
Operate time = Start time + Tripping delay
*1)
These start / pickup times are only valid under the following conditions:
• either: minimum current in 3 phases > 0.35⋅In
min
for at least 1 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. See also ╚═▷ “9.2.2 Measured Trip Times (fN =
50 Hz, 1‑/3‑phase)”.
*3)
if the protection stage is used together with Inrush Blocking it is necessary to set the
tripping delay to at least 30 ms.
214 WIC1 WIC1-1.0-EN-MAN
9 Technical Data
9.2.1.1 Phase Overcurrent Protection

Seg WI Series Specifications

General

Brand	Seg
Model	WI Series
Category	Relays
Language	English