Seg WI Series - Tolerances; Accuracy - WIC1; Protection Elements Accuracy; Phase Overcurrent Protection

9.2 Tolerances / Accuracy – WIC1
NOTICE!
The tripping delay relates to the time between alarm and trip. The accuracy of the
operating time relates to the time between fault entry and the time when the protection
element is picked-up.
9.2.1
Protection Elements Accuracy
Reference conditions for all protection elements:
• sine wave at rated frequency (50 Hz / 60 Hz),•
• THD < 1%, measuring method: fundamental,•
•
Load current / supply:
•
◦ either: minimum current in 3 phases > 0.35⋅In
min
for at least 1 s,◦
◦ or: externally supplied (only WIC1‑4).◦
9.2.1.1
Phase Overcurrent Protection
Overcurrent Protection Stages
I>, I>>, I>>>
Accuracy
Pickup value
»I«
for I > 0.5 In
±5% of the setting value or ±5%
In.
Dropout Ratio 95%
Overcurrent Protection Stages
I>, I>>, I>>>
De󰈛nite time
»Char« = “DEFT”
Accuracy
Tripping delay
»t«
±1% or ±10 ms
Operate time (for
»t« = 0 ms)
at testing current ≥ 2 times pickup value
<30 ms
*1) *2) *3)
Operate time (for
»t« = 0 ms)
at testing current ≥ 2 times pickup value
and pickup value ≥ 1,1⋅In
22 ms typical
213WIC1WIC1-1.0-EN-MAN
9 Technical Data
9.2 Tolerances / Accuracy – WIC1