Answer Posted / vinodkumarkkp

When dc to ac is converted , it is 12 v ac and t/f step up and due to this t/f does not step upto 220 v ,i.e. Nearby 220 v it is stepped up . But fans are not working properly below 220 volts a.c. I think this is also a reason.

Dear All we are having a problem in G120 BOP showing alarm A0503, F0052, F0060 we can not remove fault alarm ,Please any body help us. kowsar

1832

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Differentiate between digital phase converter and ordinary phase converter.

1239

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I have 2500KVA transformer delta/star,13.8KV/380V provided with LV 4000A breaker. Already I have 2300KW motor feeder with a full load 90%. Is it possible to connect another 1600A from that breaker? If so how the calculation is done?

3815

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WHATIS TIME CONSTANT? WHATIS ITS SIGNIFICANCE? ILLUSTRATE THROUGH EXAMLES.

2242

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How does a battary stores charge in it? please explain in simple manner and in detail.thanks

1984

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WHY IN AC DRIVES,INPUT PHASE CURRENT SHOW UNBALANCE?

2302

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How the over load setting for HT Motors calculated-provided in Numerical Relay

1820

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hi i will D.E.E.E.is completed pls send rrb diploma old qustion papaer sent in my e mail. i.d.

2333

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why the difference arise between HT reading & LT reading (submeters fixed in complexes, apartments etc)if the power factos exceed from 0.9 to 1 can the ht meter reads fast?

2969

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Explain the operation principle, advantages and disadvantages of the following converters: a) A 12 pulse converter b) A Switch-mode inverter c) A thyristor inverter

2055

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i need about 10 years of GATE solved papers in pdf format and even mock tests toooo

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How to select a contactor? How many types of contactors are available

3280

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how electrical earthing maintenance done in industry?

1627

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neutral earth resistance testing is it possible for transformer while in load condition

1949

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Differentiate between low pass, high pass and band pass filter?

1073

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