@dpc - i believe a core balance transformer really only looks at zero-sequence currents (ground current). i remember reading somewhere that a CBCT would not detect asymmetrical/unbalance phase currents. so virtually if you have no connection or leakage to ground, you shouldn't see anything. so...
Hello - at our power plant, we have motor starters that use a CBCT (core balance current transformer) to measure zero sequence current on the motor phases. It's one of those window-type CTs with all three phase of the AC motor passing through the center. The CT ratio is 50:0.025 and it has a ge...
