Interested to Buy Any Domain ? << Click Here >> for more details...
star delta connection used in reduce the starting current
at 3 times . how its reduce the current please explian .
- 7 Answers
- 27544 Views
- HP, I also Faced
- E-Mail Answers
Answer Posted / kumar
all of us know in star Vl=1.732Vp & Il=Ip, at start as current is limited to phase current, thats why motor dosent draw more current.and for delta it is normal cond. i.e.415v. get applied across each wdg. insted of 250(as in star) & line current is limited to 1.732 times phase current. Motor remains in str for 4-5 Sec only.Also power consumption in both cases remain same(can be proved).
But it is also possible that motor can draw more current in star position due application of reduced voltage,also the change in such vtg. will affect torque.
If possible try to find out derrivation for vtg. & current in star & delta connected resistance.
| Is This Answer Correct ? | 7 Yes | 5 No |
Post New Answer View All Answers
why the check zone and main zone are used for Busbar Protn. scheem?
what sort of general awareness questions are asked in o.n.g.c entrance exam?????????????????
Why does the Solid state Rectifiers for 3-ph brake motors sometimes have 2 & sometimes 3 output terminals?
What is method of calculating the fault current for a MDB, 50KW, 3PH, 415V, 50HZ?
2. What are the parameters of EHT sub-station?
Discuss about gear cutting machines.
what is the difference between transformer,converter and transducer
What determines the thickness of the lamination or stamping?
how to calculate the step resistance for slipring induction motor,how you deside the no of step for that?
How many types of electric motors are there?
What is the function of a neutral reactor.
Is there any specialised book to refer about fault level calculation both in MV and LV side??
Why Utility Distribution System in India is mainly at 11 kV? Why not Utility go for 33 kV?
What is control system?
What do you mean by screen of power cables?
