Answer / abhishek tiwary

capacitor improves the pf

explain the application of reciprocity theorom

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hi can you give any body fault level calculation, generator fault level calculation,transformer fault level calculation for system fault level with equation? i have 3.3kv generation voltage three gas gen sets, one is 1.9MW,2nd is 2.5MW,& 3rd is 3.8MW & i have 11 kv generation voltage one gas gen sets is 3.8MW, we are step up to 22kv by transformer

3 Answers   Hindalco, Piramal Healthcare,

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What is ferro-resonance in electrical system? Why it occurs and what are measures to prevent it?

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1. what is the meaning of bus? 2. what is the dc transformer? How it work 3.what is the function of the serge absorber? 4.How the CT and PT rating calculate/

1 Answers  

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How to caluculate number of batteries to connect a three phase ups by KVA?

1 Answers  

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why capacitor using the induction motor?

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We have drive feeding an output contactor for a 5000 hp motor @ 5kV application. The motor FLA is 629amps x 1.25% service factor = 786.25 amps The cable that we current have in place between the drive and the output contactor is 350kcmil- MV-105 (parallel cables). Per the NEC table 310.60 (C) (69). This show the cable ampacity is at 615 amps per cable for a rating of 1230 amps. We have derated the cable for the cable tray and the multiple cables application and our calculations show that after the correction factor factor we are at 922amps. 1230 amps x .75% correction factor factor = 922.5 amps. The customer is driving us to then use another safety factor of .25% off of the already derated cable. Can you please provide a longhand calculation for your solution on this application?

0 Answers   Siemens,

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What should be the BDV value of a new transformer oil

3 Answers  

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how one can design armature winding bothh front and back connection

1 Answers  

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ELECtrical

2 Answers   Bahwan Engineering, Bhel, Electrosteel, NBCC, Qatar Airlines,

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i want to know that what is the eligibility critaria for ongc exam?

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in dc shunt motor if field winding is shorted then

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