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in one of the hydro power project, i am having 3.3 KV generator which feeds to 33KV grid from 3.3/33KV trafo. i had a problem in PT secondary voltages which is used for synchronization. when we charge 3.3 KV bus from generator side at that time the PT secondary voltage is 110V between phases and 63 between phase and neutral. when we back charge the 3.3 KV bus from grid for synchronization purpose at that time same PT shows 110V between phases and 93V between phase and neutral. please resolve the quire why this is going to happen?
Thanks
Thanks