Answer / guest

In star connection voltage/phase=line voltage/1.73 and emf induced in generator is directly proportional to number of turns. So in star connection we have to use less number of turns & insulation.star connection is most economical than delta

Answer / ajay

Delta have 3rd harmonics which maintain circulating current in closed delta which cause heating effect. 
Y connection provide neutral for installing relays and circuit breakers which are connected in per phase manner.

Answer / narahari

in delta line voltage=phase voltage,but in star connection line voltage=root3*phase voltage then it gives more voltage than in star

Answer / nitin khatana

generator are always connected in star to prevent 3rd harmonics circulating current.another reason is in star connection (v line/root 3 =vph) so insulation thickness requirement is less in star in the given space and slot.

wat is d first thing to be seen 2 lay a cable in a particular area??

1 Answers  

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what is reactive poower

3 Answers  

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how to find three phase complex power in per unit and MVA?

0 Answers  

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why the current leads voltage in the case of a capasitor

9 Answers   Infosys,

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0 Answers  

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which pump used in WTP explain the function of VFD how to dtermine capacitorbank of capacity one plant

0 Answers   Dalkia,

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Please tell me the formulaes while designing a substation for power Calculations in designing a 33 KV Substation?????

0 Answers  

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when elecromagnatic waves are propogated in a wave guide?

0 Answers  

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What do you understand by oldham's coupling ?

0 Answers   Godrej,

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why motor run slow speed in star connection?explain how?

3 Answers  

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what is the maximum rating(KVA) of transformer can be used in distribution side..(11KV/440v) and why??

1 Answers   Jindal,

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A 15 kw squirrel cage motor having a maximum efficiency of 90% on a continuous full load has temperature rise of 42 degrees celcius after 30 min and 52 degrees celcius after 1 hr under the above operation conditions. a) calculate its final steady state temperature rise on continuous load and the heating time constatnt. b) if the motor is operated on a short load for 9 min estimate its temperature rise. c) calculate the maximum overload that can be applied on a short, 9 min rating so that the temperature rise is the same as the final steady state temperature rise on continuous load.

0 Answers  

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