Answer Posted / sudhakar g

If we Dc supply to primary side of the transformer means
the Flux doesn't change and it causes the winding of the
Transformer will burn....

sir i ve applied for hindustan petroleum and power grid india ltd..and the exams on feb 22.can you pls send model papers and tell how to prepare for those.i need to get into any of these for sure.....

2152

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Actually I have a doubt on neutral and earth.we use Ac power without taking neutral by connecting to earth,but at that time does it affects on efficiency of any electrical components or no? If yes how?

1372

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If the line voltage is reduced to 75% of its rated value then by what percentage current will reduce ?? 75% 25% 50% no change and why ?

2180

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electrical ques

2122

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Transformer how to maintaince a check b check c check d check

2071

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What is meant by vector group

2508

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how we arrange the hv side with delta connection in case 33/11kv of transformer.

1985

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1.ZEBRA conductor(large size) 2.KUNDHA conductor( small size ) 3.panther conductor(very small ) 4.lepard conductor (very very small)

2900

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In what cases (circumstances)we should apply P controller, PD controller, PI controller & PID controller ?

2163

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In ups static switch if i gives the supply at output end it will open the circuit in stactic switch or not if it will open then how it operates.

2281

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A 3-PHASE TRANSFORMER IS USED TO STEP-DOWN THE VOLTAGE OF A 3-PHASE, 11KV FEEDER LINE. PER-PHASE TURNS RATIO IS 12.FOR A PRIMARY LINE CURRENT OF 20A, CALCULATE THE SECOUNDRY LINE VOLTAGE, LINE CURRENT AND OUTPUT KVA FOR FOLLOWING.A)STAR- DELTA.B)DELTA-DELTA.

3036

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Why does the radius of armature is less than the radius of pole shoe?

2148

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we can run 2phase as 3phase .what will be the differnce with respect to phase angle, power, current between the two modes

2172

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what is the function and use of cable differential protection relay?

2883

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Why front mounted CT polarities are always towards breaker?

2013

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