Answer Posted / annu

circuit bkrs. names related with arc quenching medium which
is used in breaker. mostly air ckt. bkr used for LT system
and arc quenching mwdium is only air but vaccume ckt. bkr.
used for HT system and arc quenching medium is vaccume
which is created in separate vaccume bottles where contacts
make and break .

what reactive how to maintain

1853

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what is cause of static electricity? I experience shock when i touch metal equipment in a room ,furher check shows earth leakage showing 80ma at the DB near to the 400 MCCB?

1915

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What kind of preventive maintenance are there for transformer?

2282

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What is float cum boost charging system?

2065

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Shall I use 40A semiconductor Fuses in 32 A SFU ? Frame size is same. What Happen if Fuses burn on SFU?

2127

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I'm generating a pulse of 3V with frequency 80Hz (12.5ms time period) and pulse duration 0.125ms and feeding it to a transformer since i want the pulse to get amplified around 60V. At the output amplification s happening but the pulse is changed to a spike, can you tell me what could be the reason? (an ordinary transformer 220V-12V stepdown transformer is reverse connected ie. now it is 12V-220V stepup and voltage amplification happens)

1903

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How many gap between finger contact in a.c.b. and v.cb.?

1294

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Define transfer function?

1175

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why swityard is necessrry requirement in any bis power distributin systems?

2381

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What is the simplest formula to calculate the rotor diameter of a synchronous generator?

2456

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is it value of power factor is more than unit. whats effects in the source supply

2089

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How we calculate DC inducation moter Amp? Sir pls give me formula......

1844

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Hello Guys !! i want to rrb section engineer electrical(signal) previous model papers? any body help me?

1913

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Explain what are inter-poles and why they are required in a dc machine.

1102

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explain transformer ct connection?

2072

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