Question

Why is it important to maintain high efficiency, of operation and low values of voltage regulation for power transformers?

Voltage regulation

It is referred to ‘DOWN’ of terminal voltage on load

And is expressed as

Voltage regulation

= No Load – Full Load Voltage / No Load x 100%

Typical value is ± 5%, lower the regulation better it is for power transformers.

This Voltage regulation is to be kept minimum as it is considerable to have too much variation in voltage for the running machinery

Lesser goes the voltage current increases

Leading to heating of circuit,

Efficiency = out put / input x 100%

Higher efficiency means lesser losses. We have to minimise losses and thereby increases the useful power.