Seg WI Series User Manual

9.2.1.7 Thermal Overload Protection
Thermal Overload Stage ThR Accuracy
K⋅Ib ±5% of the setting value or ±5% In.
Tripping delay
according to the equation in ╚═▷ “Tripping
Time” in cold state (i. e. without previous
warming)
±5% of the calculated value or ±1 s.
Limiting error as multiple of assigned error
• I = 1.2 … 1.4 K⋅Ib:•
2.0 (±10%)
• I = 1.4 … 1.6 K⋅Ib:•
1.5 (±7,5%)
• I = 1.6 … 2.0 K⋅Ib:•
1.0 (±5%)
9.2.1.8 External Protection
External Protection Ipeak> Accuracy
Tripping delay
»t«
±1% or ±10 ms
Operate time (for
»t« = 0 ms)
•
If externally supplied (WIC1‑4), or if supplied via
•
CTs with I > 0.5 In:
<30 ms (typical 20 ms) in case of AC signaling
<20 ms (typical 8 ms) in case of DC signaling
• Triggered only via the Digital Input, without any•
additional supply:
<500 ms
(including the duration of a WIC1 restart in
self-powered mode)
*9)
*9)
For a cold restart of a WIC1, the operate time is mainly characterized by the charging
time of the capacitors for the trip pulse.
220 WIC1 WIC1-1.0-EN-MAN
9 Technical Data
9.2.1.7 Thermal Overload Protection

Seg WI Series Specifications

General

Brand	Seg
Model	WI Series
Category	Relays
Language	English