Answer Posted / dd

As per Industrial practice, it is mandatory to run motors
greater than 200kW at medium voltages. These motors are
star connected to reduce voltage across each phase winding
to 1/root3. This reduces burden on the winding insulation
as starting time is longer.

current transformer balance the power level on both sides. e.g in case of step up, at secondary side voltage rise but current decrease and vice versa in case of step down transformer. but how this power level remains same in case of current transformer and voltage transformer

1554

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Define the three phase formula fuse.

1816

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draw the restricted earth fault protection circuit install on power transformer and identify its parameters and draw C/C curve of it

2669

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I am apply the AAI. So i want electrical sample question paper in technical with answer my id is vijayjobsmart@gmail.com

2635

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Why star delta starter is preferred with induction motor?

1067

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What is the difference between isolators and electrical circuit breakers? What is bus-bar?

1102

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Explain difference between stand by earth fault and residual earth fault protection?

1940

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How many sprinklers should be in one pipe line?

1908

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What do you mean by reach and reach the point of the relay?

1210

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i have faced a problem in ro plant grunfos make bm30type pump it is 22kw pump. We start this pump using siemens 3rw 4423-ibc44, 30kw softstarter but this soft starter will frequently failier so we planed to change dol starter. So pls tell anybudy its possible or not.

1875

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how mass curve differs from hydrograph.

1720

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what is meant by re-rolling motor? how it differs from standard motor?

1947

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what is destructive and non-destructive testing of welding

1626

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If two Transformers are connected in parallel having impedance of 50KA in both transformers will the impedance increase or decrease after connecting transformers in parallel?

1992

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On 400 amp factory load how kvarh capacitors provide

1655

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