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

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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.

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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...
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# 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

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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

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Yes, it is called back-feeding and should only be done by a qualified electrician who has actual experience with this type of installation.   Look up buck and boost transfo

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You cannot connect transformers of different voltage in parallel. This is because circulating currents will be set up between the two transformers that may exceed their rated

# 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

# 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

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# 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

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The term, 'nominal', simply means 'named'. For example, the nominal supply voltage for a residence in the UK is 230 V. But this doesn't mean that the actual supply voltage is

# Difference between voltage transformer and capacitive voltage transformer?

Therotically there is no difference between VT and CVT , their fuction is same, But the difference is that in CVT , capacitors are used to step down the voltage and in VT, vo

# What is nominal line voltage?

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# Operation of a transformer?

Transforming a signal without changing its frequency.(amplitude can be changed)

# What is nominal ratio for a transformer?

Turns ratio of the transformer is equal to the ratio of the nominal rated voltages of its associated network sections.

# When 2 power transformers are operated in parallel what would be the net capacity Is it less than the total capacity of above transformer?

iT is above Transformer because The Two power Transformers are operaTed iT for The same shape buT cuT in half

# What is the difference between voltage transformer and capacitive voltage transformer?

A capacitor voltage transformer (CVT) is a transformer used in  power systems to step down extra high voltage signals and provide a  low voltage signal, for measurement or t

# What will happen if a transformer designed for operation on 50Hz is connected a 500Hz source of same voltage?

A; Less efficiency the other way around adios transformer

# When transformer voltage regulation will be zero it operate at?

A transformer will operate with a voltage regulation of zero when  it is not supplying a load.