Answer Posted / thota lokesh

Its ratio between insulation resistance(IR)i.e megger value
for 10min to insulation resistance for 1 min

it ranges from 5-7 for new motors & normally for motor to be
in good condition it should be >2.5 in case of PI value <2.5
over hauling should be conducted for motors and winding
should be thoroughly checked

What happened when capacitor connect series in ac circuit?

1467

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WHY NUTRAL GROUND SYSTEM USED IN 33KV SYSTEM

2191

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How to design inductive load for 3 phase 440v and maximum 5 amps for star or delta? Can we use a 15kW, 1450rpm motor for 15kW, 960rpm apllication?If yes.how......n.if thesame motor used what`s it`s sideeefect.

2398

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In cable sizing calculation (determining the max route length of cable) why we choose the shortest length between cable length of full load current Iflc & starting current Istart?

3300

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Briefly describe means used by electricity suppliers to influence the flow of active and reactive power in power networks (one for each type)?

1955

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please send 5yearje solved papers on my email himmatsinghnathawat@gmail.com

1900

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

2089

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What are the advantages of using distance protection schemes as opposed to normal overcurrent/ earth fault protection on high voltage feeders.

3570

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2. A current i=(10+10 sin t)amperes is passed through MI type ammeter. its reading will be.........

2313

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What difference between ref protection and differential protection ?

1829

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How we can recongnise the phase displacement of transformer connection between primary & scondary...plzzz explain it with example.........

2481

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Single line diagram for dbb (double bus bar)system.

1929

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distribution is maximum done by a)radial b)network c) parallel d)b & c

1993

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at work i have a genertor/alternater what is the easyest way to work out if it is dc or ac?

1868

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Define peak overshoot.

1249

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