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We have a transformer for electric arc furnace 45MVA, 30Kv/1000v. The secondary is connected to the heating electrodes through bus bar, which is water cooled. And this bus bar is supported on some insulators for all three phases.
My problem is that when one day I checked open ckt voltage at secondary, it was 600/900/1000v with phase to phase in three phases.
What may be the reasons for this voltage imbalance?
My problem is that when one day I checked open ckt voltage at secondary, it was 600/900/1000v with phase to phase in three phases.
What may be the reasons for this voltage imbalance?