Answer / rambabu

above is correct but the ct is current transformer for
measuring current and pt is measuring voltage in
sub-stations.these are using in HT sub stations only 1100v
and above.

Answer / kbonn

For example u have 100MVA transformer 66KV line
your CT ration 100,000,000/1.7320x66,000=874.77
so you can used CT ration 1000/1A

Answer / chandu

Current Transformers (CT’s) and Potential Transformers
(PT’s) are suitable located for supply to metering and
indicating instruments and relay circuits. CT’s are
connected at the terminals of each circuit breaker and PT’s
are connected right on the point where the line is terminated.

Can I use less voltage cable for neutral, since the voltage of return path is zero ideally?

3 Answers   Vijai Electricals,

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What are the test involved in DG auto synchronizing panel before in manufacturing place before dispatch.

2 Answers   L&T, TCS,

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what is the effect of constant power factor to the voltage regulation

1 Answers  

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what happens when series resonance occurs?

0 Answers  

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why two over current realy used in vcb.

2 Answers   BSES, Wipro,

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Could the power factor on electrical system can affect the registration of the kwhr meter or the CT/PT? 

0 Answers  

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WORKING PRINCIPLE OF VACCUM CKT BREAKER ?

2 Answers  

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what is R Core Transformer. how it differs from normal transformers. dont search in net and post the answer.

0 Answers  

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How can calculat the lode of transformer?

2 Answers   Maruti Suzuki,

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What is the difference between isolators and electrical circuit breakers?

0 Answers  

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Why frequency changes due to load variation in power system ? i.e why when load increases frequency decreases?

0 Answers   Madina Group,

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What will happen if the voltage in my house drops from 220V to any lower voltage?

0 Answers  

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