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.

why dc series moter is not started at no load?

5 Answers   IOCL,

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How can we do megger test of cable??

2 Answers  

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How can claculate to attain the desired PF in the line ( HOW Much KVAR is required ) Pls Give the formula? Equate Petrochemical 0 1 how to calculate sizing of NGTR (Transformer rating,Loading resistor value and Current rating of resistor) and what is the X/R ratio. Details : 11kV,Capacitance 1.73532 micro farads,40kA for 1sec. 0 1 What will happened. if we feed 3phase supplay to the stater with out insert the rotor. How much current will flow through the stater winnding? Equate Petrochemical 0 1 What is required of exietation to the alternater. 0 1 why star point of HT motor not earthed? Equate Petrochemical 0 1 Why we are getting low voltage in star connection? Equate Petrochemical 0 2 What's ND relay & it's functions? Equate Petrochemical 0 2 How instantanious short circuit current is calculated? its formula? Equate Petrochemical 0 2 What is servo Motor? What's the advantages of this motor over Induction motor? Equate Petrochemical 0 2 What is core CT & it's function? Equate Petrochemical 0 3 what is meant by star/delta voltages as 440/220 in a 3 phase induction motor, and why it should be connected on STAR IN 3 PHASE SUPPLY L & T 0 4 What is required of exietation to the alternater. KNB 1 23 what is the design voltage for 6.6KV 2000 KVAR HT capacitor? Consultancy 0 3 Pls explain about vfd control?Where it is used, Give some example? siemens 1 22 Please explain me abt PQ diagaram in the power sector. 0 9

0 Answers  

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How to check the specific gravity of the two 12 V batteries connected in series to a 24 V UPS and inverter ? will we have to disconnect all the connections and turn off the UPS and inverter or not ? will we have to check specific gravities in each cell of the two batteries ? what is the name of the instrument that is used to check the specific gravity and whats the procedure to check the specific gravity with it ? thanks

2 Answers  

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Why using synchronising methed in DG's sets?

0 Answers   Juniper Networks,

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what effect on electrical equipment if PF is gone over 0.996 in leading when provider say that its keep in minimum 0.996lagging

3 Answers   ABB,

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calculation of knee point voltage of current transformer?

2 Answers   TATA,

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What is principle of Floroscent tube 36watt.

0 Answers   Diamiller, NDPL, Trident Hilton,

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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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What happens to a line-frequency of high-frequency transformer when it is first energized/ re-energize?

0 Answers  

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what will happen when square wave is fed into input side of 3kva transformer and what you will get on output side.

3 Answers   Blue Star,

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How would you supply power to a village which is very far from a sub-station and has only a 11k?

4 Answers   Power Grid,

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