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.

What do we use in Motor core laminations..???CRGO or CRNGO..and why..????

1 Answers  

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how do prepare ongc exam.how is it question model.i am electrical. which part covering in electrical.tell me

0 Answers   ME,

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tell me some type of questions throught which i can prepare for exam and do my best

0 Answers   Jindal,

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Dear all, Can anybody tell me that how to choose CT for a specific load? I have a 200kw induction motor, which ratio CT should be installed? Is there a formula or calculation that determines the CT ratio for a load? Regards.

2 Answers  

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How would u describe the function of a generator & motor?

5 Answers  

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why CT ratio stand for 50/5, 100/5, 25/5.

11 Answers   ABB, Ramky,

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What is meant by CFL & PL lamps

1 Answers  

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what is the different beetween kva and kwh?

4 Answers  

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we have a 2000kva step down transformer at our site. The HT side is charged from 22000V. So the primary current will be 52.48A. So why the HT breaker(SF6 ABB) is rated of 1250Amps ?

2 Answers  

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In AC if the direction of current keeps reversing every half cycle, how does it propogate through the transmission lines?

0 Answers  

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What is duty cycle for HT motors? How many start permitted if mentioned as 01 for hot and 02 for cold per duty cycle?

1 Answers   GVK,

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The ohm is the unit of:(a) Charge(b) Resistance(c) Power(d) Current

2 Answers  

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