Answer Posted / raj patel

no it is not necessary to have marshelling box in 200kva transformer because there are not much control equipment in small transformer like cooling fan, oil pump, etc. auxilaries provided to 200kva transformers are very less so providing marshelling box will increase cost and also affect design criteria of tranformer.

if the motor rated speed is 950rpm. how to change the above rated speed? is it possible?

1008

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What is the diffrence (Technical & Construction ) between CBCT & Normal CT?

1559

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why ten delta testing is carried out on power transformer

1361

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what is difference between elr and R eartl realy.

1896

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What is difference between Sample test and Routine test in safety standard?

1296

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Why 1/3 is used in symmetrical components?

1390

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How much inductance or resistance require as a starter in series with induction motor of specific capacity(e.g. 5 hp) ? What is formula for it ?

1500

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What is the efficiency during maximum power transfer?

691

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What is the drawback of class b amplifier? How is this minimized?

673

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In the formula : Knee point voltage = Burden X alf / class, Please inform what is alf? regards Shashidhar M.R.

3398

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The efficiency of a 100kva transformer is 0.98 at full load as well as half load , for this transformer what is the Copper loss at full load ?

1813

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In case of salient pole alternator when number of poles are 4 or more than 4 it helps the flux wave to be sinusoid as air gap length is increased from center to tip , but if the number of poles are 2 how does the flux wave is sinusoidal?

1531

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Why is tan-delta test and capacitor measurement done on alternator?

1689

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sir i applied for hpcl(electrical).i want to know from which subjects most of the technical que will b asked.and pattern of the written test.pls help me

1479

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What is reactance, reluctance,capistance, pls give answeer in hinglish and be simply Jo asani we smajh m aa jaye

1584

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