Question

what is transformer.difference between ct and pt

Answer 1

heyy dear ☺☺.

an apparatus for reducing or increasing the voltage of an alternating current.

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DIFFERENCE BETWEEN CT AND PT:>✓✓

While a potential transformer(PT) used to reduce the voltage to lower values and to provide isolation between high voltage power network and the relays and the other instruments that are connected to their secondaries. CT is used for current measurement and PTis used for voltage measurement




hope it's help uuu ☺☺❤

Answer 2

Hi frnd,

#Current Transformer:

*If the CT is under service the secondary of a C.T can not be open circuited on any condition.

*A CT can be regarded as a series transformer.

*The current in the primary side of a C.T is independent of the secondary also known as the burden.

The primary winding of the CT is connected in series with the line
carrying the current to be measured.

*Hence it carries of the full line current.

*With the help of CT, a 5A ammeter can be used measure a high current like 200A.

#Potential transformer

*The secondary of a P.T can be open circuited without any damage being caused either to the operator or the transformer.

*P.T may be considered as a parallel transformer.

*The primary current of a P.T depends upon the secondary circuit conditions (burden).

*The primary winding P.T is connected across the line of voltage to be measured. Hence the full line voltage is impressed across its terminal.

*With the help of P.T, a 120V voltmeter can be used to measure very high voltages like 11KV.

I hope it is helpful for you.........