Transformers

21. Which of the following is not a routine test on transformers?

Core insulation voltage test
Impedance test
Radio interference test
Polarity test

Detailed SolutionWhich of the following is not a routine test on transformers?

22. Two transformers operating in parallel will share the load depending upon their

leakage reactance
per unit impedance
efficiencies
ratings

Detailed SolutionTwo transformers operating in parallel will share the load depending upon their

23. Which of the following is the most likely source of harmonics in a transformer?

poor insulation
Overload
loose connections
Core saturation

Detailed SolutionWhich of the following is the most likely source of harmonics in a transformer?

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