Seg WI Series - Ground (Earth) Overcurrent Protection

9.2.1.2 Ground (Earth) Overcurrent Protection
(Measurement of ground (earth) current is not available for all device variants.)
Ground (Earth) Current Protection
Stages IG>, IG>>
Accuracy
Pickup value »IG«
for measured ground (earth) current
and IG within 0.02 … 10 In:
±2% of the setting value or ±2% In.
Pickup value »IG«
for calculated ground (earth) current
and I within 0.35 … 10 In
*4)
• ±3% of the greatest phase current value or•
±9% of the setting value.
• with setting »Measuring method« = “True•
RMS”:
±15% of the setting value.
Dropout Ratio 95%
Ground (Earth) Current Protection
Stages IG>, IG>>
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
<40 ms
*1) *2) *3)
Ground (Earth) Current Protection
Stages IG>, IG>>
Inverse-Time / Characteristic curve
Accuracy
Start time (pickup time)
At testing current ≥ 2 times pickup value
<40 ms
*1) *2) *3)
Tripping delay
For testing current in the range 2 … 10
times pickup value
and I = 0.5 … 2 In
±9% or ±40 ms (according to the selected curve,
see ╚═▷ “11.2.2 Characteristics (IG>, IG>>)”)
Operate time = Start time + Tripping delay
*1)
These start / pickup times are only valid under the following conditions:
215WIC1WIC1-1.0-EN-MAN
9 Technical Data
9.2.1.2 Ground (Earth) Overcurrent Protection