What would you like to do?

Why is it not good to operate a transformer above its nominal voltage?

already exists.

Would you like to merge this question into it?

already exists as an alternate of this question.

Would you like to make it the primary and merge this question into it?

exists and is an alternate of .

Overexcited Transformer.
Operation above the rated supply voltage causes the ferromagnetic core to enter saturation; this means that the primary inductance is reduced and since the primary current is limited by primary resistance +inductance then the primary current will increase and possibly cause the primary winding current capacity to be exceeded. Also the iron core hysteresis loss will likely increase and cause the core temperature to rise. We have not considered eddy currents in the core, probably these are less than the hysteresis core loss.

<><><><><><><>

Addition:
also the stresses that caused by increasing the voltage will over heat the transformer by mean the life time is redused, for example: if the life time for a transformer is 20 years this number will decrease due to operating the transformer on a higher voltages than the rated...
Thanks for the feedback!

What is voltage transformer?

its also named as potential transformers...it is one type of instrument transformers used to measure high range voltages using low range volt meters. basically it is used to e

What is meant by nominal current or nominal voltage?

The word nominal means the lowest possible safe amount. So, nominal  current or nominal voltage is the lowest amount necessary to  perform an electrical function like keepin

What is nominal voltage?

It is the rated voltage of an electric equipment. It is the voltage at which the device is designed to operate. Another Answer Nominal means 'named'. So a nominal voltage is

Will transformer operate if a battery is used for the input voltage across the primary?

Transformers only work on a.c. This is because it's necessary to have a changing primary current in order to induce a voltage into the secondary winding. If you connect a batt

What is the theory of operation of voltage transformer?

A voltage transformer (VT) is used on alternating current (AC) systems to provide a standardised equivalent or representatative voltage compared to that of a higher voltage (H

What is the Difference between nominal voltage and operating voltage?

Nominal voltage is the 'named' voltage -for example, the nominal supply voltage in the UK is 230 V. But this is not necessarily the actual voltage at a particular time. A nomi

What happens when a transformer is operated at no load with high voltage?

It depends on how much voltage you have applied. If you apply rated voltage nothing happens only core losses will be there on the transformer nothing will happen apart from t