Answer Posted / mathhar

LOAD : 50kW , 415V , 0.8p.f
1- I = 28.75A
2- 28.75 * 1.2 = 34.5A
3- temp. factor * group factor = 0.75 "ex."
4- 34.5/.75 = 46A
5- choose 16mmsq
6- cal. Vd = (I * L(m) * delta(v)/ (V * 1000))*100%
its should less than 5%
7- short circuit temp. rise

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