These Electrical Engineering Interview Questions Answers are based on CG Power Transformers.
Learn these 7 Electrical Interview Questions for getting more knowledge in transformer maintenance and troubleshooting.
1.
Which Types of Faults Occurs in Transformer? There are basically nine types of faults occurs in transformer.
1.
Ground fault.
2.
Phase to Phase Faults.
3.
Inter turn faults.
4.
Core faults.
5.
Overload faults.
6.
External Short circuit faults.
7.
Magnetizing inrush faults.
8.
Ferro resonance faults.
2.
Which types of characteristic can detect transformer internal faults? There are three types of characteristic generally provide detection of transformer faults.
1.
An increase in phase currents.
2.
An increase in differential currents.
3.
Gas formation caused by fault arc.
3.
Explain Unit Protection & Non Unit Protection.
Unit protection are operated only for fault in the protected transformer.
Non unit protection are operated for a fault outside the transformer.
It is also called as back up protection of transformer.
4.
Why we need Biased or Percentage differential protection? Thanks for watching 7 Electrical Interview Questions Answers for CG Power Transformers.
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