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The following faults occur in transformer.

1. Temperature rise in winding

2. Temperature rise in oil

3. Overload

4. Insulation failure in oil

5. Earth fault

6. Short circuit

7. Failure of tap changing.

8. Open circuit

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13y ago
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11y ago

Lightning strikes take out many Transformers each year.

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Q: What are the main causes of electrical transformer failures?
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