Answer / k.prakashchandra

22.5 is 4.5 % of 500

when voltage increases current decreases & vice versa why it is so?

3 Answers  

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Why transformer, generator, ups rating kva?

2 Answers  

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what is the first step of dg shycroning ?

2 Answers   ABB,

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Can anyone tell me how a 12v battery is transformed to 20,000v at the spark plug

6 Answers  

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what is the effect of higher value of GD???

0 Answers   VEPL,

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how we can calculate power factor without knowing current in 230v 100w load ?

10 Answers  

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what is the powerfactor

5 Answers   GVK,

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I have carried out wiring for lighting in a shed in Industrial area which contains Metal halide lamps & have balanced in 3ph.Now when we put all the lines on in the daytime the current taken at 3phases at MCB comes to be equal i.e.28,29,28Amps respectively but in the night time i.e between 7p.m.to 11p.m. at the same MCb the current is 52,59,62Amp, though I have fit 63A MCB it is tripping in the above period.What may be the reason.? Note: This industry is located in industrial area where majority of steel ingot manufacturing plants are there. Whether this may be due to harmonic? what should I do to overcome above problem.pl suggest urgently.

4 Answers  

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State the frequency for rc phase shift oscillator?

0 Answers  

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ASTM D 3455 - Standard Test Methods for Compatibility of Construction Material with Electrical Insulating Oil of Petroleum Origin has been used for Testing Transformer Oils with a product placed in it. Aged Control Oil has a Power Factor of 0.032% at 100°C. Aged Oil with a Test component has a Power Factor of 0.093% at 100°. Is this increase acceptable? If not why? How much increase is acceptable?

0 Answers  

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what is the preventing maintenance of transformer

1 Answers  

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What is icu and ics in Acb and how many time icu or ics passes from breaker?

0 Answers   Engineering Vision,

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