Answer / ashhad khan

reactive power is like heart for AC electricity without reactive power fans,motors cannot work .because until reactive power is generated in windings
energy cannot transfer from electrical energy to wind energy (in case of fans)
or generally in form of motion. one can think it as we switch on the fan before fan rotates reactive power is setup in the windings which will form magnetic effect which at-last force the rotor to move. so without reactive power all this is impossible. while in case of dc supply no such reactive power is required because in dc there is no such angle between current and voltage and whenever voltage is setup current will be in phase with voltage.

reactive power is generated whenever ac voltage is setup accross an inductance .moreover its not generated, its a part of power only as V*I*sin(theta).

why generator and t/f ratings given in kva?

2 Answers  

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raleigh method

0 Answers  

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In 1000KVA Transformer why does we connect HT with delta connection and LT with star connection.Illustrate by showing formula?

4 Answers   Tata Motors,

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Can any answer me ,What will be the range of C.T coil for L&T energy meter EM301 used for 180 kva DG set

0 Answers  

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difference between temperature sensor and temperature switch

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Explain about Leakage Test.

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What are safety device in vcb and acb?

0 Answers   IOCL, L Usine Fashion,

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can we use 220 volt 15 w a.c. lamp on 220 volt d.c.

11 Answers   Philips,

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suppose i have two single and three phase induction motor,thier have not any rating on its panel,anybody can tell me which motor is single or three phase?

1 Answers   Doon,

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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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Which contains in POLE ASSEMBLY of a 11KV Kirloskar-make SF6 (Model No-FP620A12)? Will u clarify with drawing?

0 Answers   Kirloskar,

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