Double line to ground fault

[Sthabik PE]

Graffeo Ex 53:



In this example, for Double line to ground fault current only Ib is considered here which is incorrect.

I think the fault current shall be "Ib+Ic" or "3 x Ia0" which will lead to the answer "j10.71".

Please correct me if i am wrong.

 

[eatsleep]

I believe you are right, my notes seem to agree with you. I couldn't find that problem in graffeo but i did find the below one. This looks correct.

 

[Sthabik PE]

@eatsleep: Thank you so much for your confirmation.