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. 

Write a note on RC operational amplifier as integrator

1 Answers  

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why diesel tank is earthed

1 Answers   ABB, NTPC,

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HOW TO CALCULATE HV CABLE SIZING?

0 Answers   KNPC, L&T,

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CALCULATE THE TOTAL VOLTAGE DROP AND SELECT THE CABLE SIZE IN MM-SQARE FOR A PANEL-262KW AT 110 METER FROM THE SOURCE SUPPLY , SUPPLY VOLTAGE 240/415

0 Answers   DEWA, Growth,

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define electrical field?

6 Answers   L&T,

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What are the protection used for alternator,transformers.

2 Answers   Adani,

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What is the role of power pack in substation protection system?

0 Answers   Facor,

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What is MSL designation of a motor and same may be provided in details.

0 Answers   DAE,

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what is meant by reactive power ,active power & real power ? thank you

2 Answers  

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What's the differs between voltage & current & emf.

1 Answers   CTS, NTPC, TCS,

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what is difference between power transformer and distribution transformers

1 Answers  

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why it is important to earth neutral of 3 phase transformer?

9 Answers   IBM, ITC Indian Tobacco Company, RRB, UDS,

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