I find solution for IT characteristic. this sample example given here. need c code
assume Overload current = 10A(user defined setting)
Over load current trip time =10s(user defined setting)
if curve 2C is selected
calculation are as below The relay should turn on 30% over load trip time i.e 13A
Trip_Time over_current
10 10
9 10.3
8 10.6
7 10.9
6 11.2
5 11.5
4 11.8
3 12.1
2 12.4
1 12.7
0 13
in code if the Nominal current exceeds overload current these are trip timing for relay. The timing and current will change as per user defined setting. can some one guide me C code.