Current Imbalance is a measure of the largest deviation in current between phases. A current imbalance may be indicative of a high resistance connection. A voltage and current imbalance together is a more reliable indicator. Test location determines whether both imbalances are present in the event of a high resistance connection. If the test is performed upstream of an anomaly, there will only be a current imbalance. If the test is downstream of the anomaly, both a current and voltage imbalance will exist. Parallel components such as power factor correction capacitors in the power circuit may also cause a current imbalance. Testing needs to be performed with and without the parallel components in the system being tested to eliminate them as the cause of the current imbalance.
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