Why is power factor of a single-phase induction motor low?

The low power factor of a single-phase induction motor is mainly due to the large magnetizing current which ranges between 60% to 70% of a full-load current. Consequently, even at n0-load, these motor reach temperatures close to the full-load temperature.

source: books of V K Mehta

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What is the most common fault in a power system?

The most common fault in a power system is single-line-to-ground fault. Experience shows that between 70% and 80% of the faults that occur in the power system are single-line-to-ground fault.

source: books of V K Mehta

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