Answer Posted / nagaraja bagi

Buchholz relay is used for Transformer Internal faults,bcoz
of over load or internal faults more heat will produce it
decomposes the oil and produces the gas and because of
transformer insulation gas will produce and it will try
move from main tank to conservator bcoz it is light in
weight then alarm float will operate and gives the alarm if
it exceeds then tripping float will operate and trip the
Breaker of Transformer.

Metal covered multiconductor cables shall employ a marker tape located within the cable running for its complete length in lieu of cable surface marking. Is it true or false?

2200

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What is real time power factor control panel(RTPFC)?

4257

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please send me last 5 year interview questions

2155

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how does grading rings & spacers in transmission line works? Working Principle?

2031

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is it possible to have dc motors on single chip

1776

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Why armature rheostat is kept in maximum position?

1053

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Is MEN and RCD related to each other ?? IF yes then how??

1826

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A 7 storey building has a floor area of 35,000sq.ft on each storey. On the ground floor 11KV electrical sub-station is to be erected. A load of 3kw for every 400sq.ft (p.f is 0.8) is proposed for each floor. fire pump 7.5hp, water pump 5hp, lift 2 nos, each 10hp and 20shop load of each shop is 5kw. calculate a. load each floor b. total load of building c. L.T feeders for aech floor and from transformer to main. d. distribution diagram e. capacity of sub-station/capacitor bank f. line diagram

2769

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Explain the different regions in frequency response?

1037

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Grid fault level [KA]?

2554

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Why have to use copper cable for local isolator to motor ?

2041

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Please send 110 kv sb station full single line drawing(sld)

2411

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how can calculation ate Amps for cabel. Ex-for 1sqmm wire hou many amps we can draw

2387

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What is marx circuit?

1074

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what will happen if frequency is below 50 hz?

1958

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