Answer / suhas

after generating voltage, it has to be transmitted....to
transmit we use delta connection as it needs only 3 wires
which saves money...steppin up of voltage is done to
decrease losses in transmission...so step up transformer
has Y-del connection...in the receiving end(step down) we
can use del-del or del-Y...by using del-Y connection we hv
d flexibility of selecting the 3 phase and 1 phase
voltage... this method is done usually for
distribution...for further transmisssion, in swithing sub
stations, the step down trafo will be del-del....with
tertiary as star.....

what is the difference between control transformer and Potential transformer (PT)?

1 Answers  

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While testing the 33KV Busbar by using Hipot kit, what should be the test voltage we have to apply

2 Answers  

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flurescent bulb rating is to 230v,50HZ.now flurescent connected 230v,25HZ.whether nreduced frequency will affect the glowing properties of flurescent.

6 Answers  

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why generally transformer are in star to delta or delta to star used?

8 Answers   ABB,

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When geneartor is running in poor lagging side power factor its excitation current increases then it is running in improved lagging side.Kindly tell me when gen is running in leading side what will happen

3 Answers  

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why we use circuit breakers for switching instead of normal switching device?

0 Answers  

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Why used in layer by layer charcoal and salt used in earth pits.

11 Answers   CESC, HP,

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How to calculate busbar size & what is the procedure we make for determine that?

35 Answers   Auko Tex, Integra, PowerTech, Shadhin Group,

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What is the importance of counter based plan & how is it scheduled?

0 Answers   TATA,

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If a surge divertor is required to be protected by 32 amp C Curve Circuit breaker does this limit the amount of protection from surges that you will acheive

0 Answers  

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What is power factof?

21 Answers   RRB,

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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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