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 do we prefer a 3-phase delta connected load rather than star connected?

4 Answers  

---

Can we step up a 230V supply to 400V using a single phase transformer??

2 Answers  

---

In Siemens S7-300 PLC, what is funtion and funtion block ? What is the difference between them ? When to use function and when to use function block

2 Answers  

---

What is the unit of charge and current?

0 Answers  

---

how to put cable sizing and cable glands size for respective cable & Cable Lug size in a DB sectors???

0 Answers  

---

Why does the rotor rotate?

1 Answers   Machino Polymers, OPTCL,

---

What is Annunciation?

0 Answers   Solare,

---

SIR, GIVE ME OPGW SAG CALCULATION FORMULA I AM DAE ELECTRICAL. THANKS

2 Answers  

---

why excitor coil of an alternator can fail

3 Answers  

---

Why the generating station rating is in KW though the rating of generators in KVA?

8 Answers   HAL,

---

When testing an earthing connection, we use a 60 or 100 candle bulb with a phase connected direct from supply and the other wire to the new earthing provided.If the bulb glows then the earth is ok.Else earth connection is not Ok. So, why dont we can use all the home appliances taking a single wire from the phase and the return connection to Earth instead of return connection to neutral?

2 Answers  

---

What happen if we have run 415 V,50Hz designed motor at on 480V,60HZ

8 Answers  

---