Answer / r.k. gupta

We are using IGBT & SCR in UPS system because these are high frequency switching with high current devices. which are used in UPS for inverting the supply from DC to Ac during battery backup of UPS. 

what are the electrical components required for run the motor pump including safety components plz explain it how we can use such components .

2 Answers  

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What happen if transformer neutral path get removed ?

1 Answers  

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what is power factor ?

12 Answers   KSEB,

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what is the breakdown voltage value in BDV test in transformers?

6 Answers   Siva, TATA,

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hello if any one have papers vof hpcl or sail, plz send me

0 Answers  

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what are factors to be consider to design a HT & LT motor?

1 Answers  

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State four advantages of hydro power station over nuclear power station.

1 Answers  

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What, in the construction of a transformer, controls KVA? For example 600/208/120 V transformer can be 10kVA or 45kVA!!! What do we change in the construction of a Transformer in order to change the rating but not the voltage.

1 Answers  

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What is the difference between earth fault and restricted earth fault protection?

1 Answers  

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If ac 230volts inputsupply to full wave rectifire what is D C output voltage.

3 Answers  

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why we provided electrical earthing?

5 Answers   CPCL,

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what is the effect of PF on alternator sizing?

2 Answers   Siemens,

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