Phase Transformer Turns Ratio Tester

Guide to Transformer Resistance Testing 100406

• To detect damage to the transformer. • To determine if corrective action is necessary. • To establish priority of corrective action. • To determine if it is safe to re-energize. Many transformer faults or problems will cause a change in the DC resistance measured from the bushings (shorted turns, open turns, poor joints or contacts).

  Turn, Transformers