Assume a typical 75 KVA transformer feeding a branch circuit panel board is balanced between the three load side phase conductors. Even with this balanced condition, I am told that the neutral current can be as much as 1.73 times as high as the phase conductors if the transformer is feeding a great deal of harmonic producing load. My questions are:
1) Is this condition made worse if the phase conductors are not balanced, or even very much out of balance?
2) What is the effect of this condition on the line side of the transformer...that is, are conductors, panels, and switchgear upstream of the transformer effected?
1) Is this condition made worse if the phase conductors are not balanced, or even very much out of balance?
2) What is the effect of this condition on the line side of the transformer...that is, are conductors, panels, and switchgear upstream of the transformer effected?