Answer Posted / raj

subersible pump & 25 HP centrifugal pump are more suitable
and economical for lifting water from 300 meter borewell.

what happen if the load connected to the induction motor is taken away? the same question for synchoronous generator in synch i think that the the exitation voltage will appear on the terminal only if so plz answer me

1947

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A 400 V, 50 Hz, Δ connected synchronous generator has a field reactance of 0.1 Ω and armature resistance of 0.015 Ω. At full load, the machine supplies 1200 A at 0.8 pf lagging. Under full-load conditions, the friction and windage losses are 40 KW and the core losses are 30 KW. What is the machine’s overall efficiency? Ignore any field circuit losses.

1821

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What is negative sequence over voltage element?

1897

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what will happen reduce the transformer voltage from 415v to 406v, is it save the energy,? are this methodis good to reduce the energy.?

1465

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If we need4× 50mm sq cable but it's not available so we can pull 4×25mm sq 2cables

1397

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how to store the thunder power?

4390

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can anybody send me syllabus of rrb section engg (electrical). and also send previous question pepar...

1942

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sugest any typical project ?

1757

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Can any body tell me the different types of LT cables & their application.

2061

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how to measure dc earth leakage current?

3086

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What are the disadvantages of autotransformer?

1070

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What is meant by vector group

2443

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if negative of DC supply used and positive is grounded through EGB, and if ELCB used in the system then is it sense the positive volatge and get tripped is it possible?

1778

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What is difference between safe PLC and normal PLC

1534

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Which type of a.c motor is used in the fan (ceiling fan, exhaust fan, pedestal fan, bracket fan etc) which are find in the houses ?

983

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