Why Transformer Rated in Kva and Not in Kw
Why the Transformer denoted and measure by Kva and Not in Kw?….
Transformer is to be used for Require output power or step up or step down.
Now any Electrical machine during running condition have rises the temperature.
Same as transformer happens,when switch on and supplied the load then result is rises the Temperature.
The two cause or 2 dis advantage of transformer in rising that is iron or core losses and second one is copper or winding losses.
It is depend for the flow of electric current to the Transformer.
iron or core losses.
It is depend to the applied voltage to the Transformer.
These two losses or factor cannot be effected to the Power Factor.
That way any Transformer is making and designed for rated voltage source and flow of free electron (Current), we can not predict the power factor while manufacturing process of Transformer.
When any manufactures of Transformer does not know and no have any idea that , which type of load can be used the load may be use for (Resisstive, Inductive, or Capacitive) they can only used rate the device according to it high current output that the conductors can securely carry at unit power factor and insulation rating of the wire voltage and temperature.
That’s why the device can be measure and denoted by Kva not in Kw.
- Any Transformer have depend core and copper losses.
- Core losses are depend on In coming electrical source.
- Copper losses are depend on flow of free electrons (current) flowing to the transformer windings.
- That way total losses are depend’s on electrical source in additional to current but not effect on power factor .
Thus, the rating of transformer is measure and denoted by Kva not in Kw