David,
Okay, that seems to be the reason. We also did the spicing for the one phase of the cable and which could also make little change in the impedance for each phase of the loop.
Yes, the two source lines are electrically connected and fed from a Utility 15KV switchgear with Tie closed.
What are the factors that change the impedance of each phase? We are using the same cable size and model.
How much unbalance is acceptable on the Main breakers?
Please see the attached for the reference.
So we observed Phase current Imbalance in our 13.8KV Main Incoming CBs when our Tiebreaker is closed condition. The maximum difference we observed between IA and IC is 36.9A. But when we Open out Tiebreaker, all three phases become balance.
As our...
