Recent content by Gman

When we size the conductor for a single motor, do we always assume it is continuous duty and multiply full load amp by 125% even if the question does not call out continuous duty?

The question is about differential relay on a delta-wye transformer. I understand that the CTs need to be wye delta configuration to fix the phase shift. Therefore the CT secondary side current should be multiplied by sq root of 3 to get the relay current. On this PPI practice question the...

The answer key says A,B,D so that's wrong right? A is incorrect but B and D are?

Why is the zero-sequence current phasor equal in magnitude and displaced by 120 degree? Shouldn't it be same as zero-sequence for voltage phasors which are same in magnitude and in phase? Thank you in advance

Could someone please explain to me why the solution is calculating Van phase voltage using Wye connected formula? Isn't VAB=12.5KV the phase voltage for the delta connection?? Much appreciated