Cram for Exam Vol. 3 Question 26 - Grounding bank providing current to load?

[akyip]

Hey guys,

I have a question while re-practicing the Cram for Exam questions.

How does a grounding bank provide current to a load? See the attached problem 26 from Cram for Exam Vol. 3.

I see their explanation that the grounding bank doesn't provide any power to the 1-phase load, but it still doesn't explain how the load gets 1/3 of its total current from the grounding bank...

Does anyone know an explanation to this?

Thanks for any input on this!

 

[Dothracki PE]

I think It's just a KCL exercise with an unbalanced system since the load is a single phase load connected to A leg. The ground bank is basically an inductor in parallel with the source so there is no real power change. Based on KCL the current is only in AB, CA, and the ground bank inductance. Could be wrong but just my interpretation with the solution.