26th October 2019


Why the rating of transformer is in KVA?

Copper losses ( I²R)depends on Current which passing through transformer winding while Iron Losses or Core Losses or Insulation Losses depends on Voltage. So the Cu Losses depend on the rating current of the load so the load type will determine the powerfactor P.F ,Thats why the rating of Transformer in kVA,Not in kW.

What is the turns ratio of a transformer?

A transformer with a primary winding of 1000 turns and a secondary winding of 100 turns has a turns ratio of 1000:100 or 10:1. Therefore 100 volts applied to the primary will produce a secondary voltage of 10 volts.

What is the ratio of transformer?

Transformation ratio is the ratio of secondary voltage to the primary voltage and is equal to the ratio of the number of turns in the secondary winding to the number of turns in the primary winding, if leakage flux is neglected.
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