Question

Power factor of magnetizing component of a transformer is
A.Zero

B. Unity

C. 0.8 lagging

D. Always leading

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Answer 1

Answer:

Zero is correct from my point of view

Answer 2

The correct answer is option A (Zero)

The power factor of magnetizing component of transformer is zero.

• A transformer's insulation can be evaluated using power factor (PF).
• The most frequent number used to indicate that insulation is acceptable is 0.5% PF, which corresponds to designs for circular coil power transformers.

• The magnetising component will be in phase with the flux since it generates the magnetising flux as part of its function.
• The magnetising component of no-load current lags the applied voltage by 90°, as can be seen from the phasor.
• The flux is 90 degrees behind where the induced emf in the primary and secondary windings is.
• The primary side's power factor will be 0.95 lag.

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