Answer Posted / suni

SF6 Vaccum circuit Breaker is used for 400KV substation
and above

2 v/500amp/hr to 1.80vpc at 20 degree celsious 2v/5ooamp/hr to 1.75 vpc at 77degree farren .this is the capacity of a battery .what is the meaning of this . can i get a detailed explenation

2307

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how is the incoming cable size calculated for a given current rating of a panel??

1947

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define displacement & magnitude ?

1848

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what are the parameters plays a major role in Potential transformer Burden calculation??

2212

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what is the meaning of 0.5ohm Resistance

1865

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What is the basis for selecting Vk/2 or Vk/4 for REF and Differential protection of Transformer and What is the significance of magnetising current

2410

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How to select the earthing transformer,for DELTA TO DELTA TRANSFORMER OR ALTERNATOR SIDE.Pls post your answers and calculation.

2385

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What is the unit of magnetic flux density?

1189

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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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can anybody send the rrb chennai &rrb bopal question papers of 2006&2007.My exam is on 12 oct 2008.Its urgent

2054

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in a silicon diode we can measure .7v in a voltmeter.but why we can't use this voltage for using?

1929

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Explain the operation carried out in thermal power stations?

1055

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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?

1880

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How to calculate Voltage regulation of 22 KV Over head Line.

1678

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Name the test signals used in control system

1299

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