Answer / erharisheee51

instument transformers are used for metering and protection
purpose. like cureent transformers and pottential
transformers, which is upgraded with different cores

Answer / khilendra pant

the instrument transformers are

1. p.t.(pottential
transformers)= for voltage
2. CT (Current tranformer)=for current
we use instrument x-mer for protection purpose.

Answer / abdul wajid

Instrument Transformers are current tansformers and
potential transformers used for measuring as well as
protection purposes

Answer / mahesh-lanco

instrument transformers are used to measure high voltage
&current usually in transmision system.As the measuring
instruments are not up to larger values,for example if any
faul occurs KAmps of currentmay be generated there is no
equipment or measring meters are available.For this
Instrument transfrmers (potential Transforers,Current
Trasnsformers)are comes into picture.
Usually secondaries of the Current and Voltage transformers
standardised to 5Amps and 110Volts respectively.

Answer / tushar gawas

instrument transformers are used to measure high voltage
&current usually in transmision system.
range of certain instrument used for measuring are
limited if it increase beyond limit the instrument gets
damaged.
to avoid this for high voltage & current instrument
transformers are used.
they are ciassified in two types.
1.current transformer.
2.potential transformer.

Answer / sukhvinder

the instrument transformers are

1. CVT(Capacitive voltage transforme)

2. CT (Current tranformer)

First have three cores used for metering and protection
purpose in substation

Second have five cores and also used for protection and
metering in substation

kVA rating of ordinary transformer is increased when connected as an auto transformer because A transformation ratio increased B secondary voltage increased C energy is transferred both inductively and conductively D secondary current increased

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