Why only 1ph,2ph,3ph supplies are universally used?? Why not 4ph or 5ph??

Why only 1ph,2ph,3ph supplies are universally used?? Why
not 4ph or 5ph??

Question Posted / jayakumar

4 Answers
7797 Views
I also Faced
E-Mail Answers

Answers were Sorted based on User's Feedback

Why only 1ph,2ph,3ph supplies are universally used?? Why not 4ph or 5ph??..

Answer / ibrahim hassib

When the generator is fitted with 3 windings equally spaced
at 120 degree, the resultant 3-ph electric power is 1.73
times the same electric power produced if you fit the
generator with one winding for the same rotation of the
machine. If we would add more windings the increase in
electrical power output will not yield a significant
increase in electric power to justify the cost of the
additional windings and the associated complexity of design.
So, it was universally agreed that fitting the generator
with three windings is the most economical solution and the
three phase power science was born from that point on ..

Is This Answer Correct ?

9 Yes

2 No

Why only 1ph,2ph,3ph supplies are universally used?? Why not 4ph or 5ph??..

Answer / brdganesh

Just my thought We cant make star and delta
conection correct?

Is This Answer Correct ?

0 Yes

0 No

Why only 1ph,2ph,3ph supplies are universally used?? Why not 4ph or 5ph??..

Answer / kcp

three phase supply only produce rotating magnetic field.then
only the operation occurs depending on electromagnetic
induction.and also if we use 4phase no. of conductors will
incresase and results in increased cost

Is This Answer Correct ?

0 Yes

0 No

Why only 1ph,2ph,3ph supplies are universally used?? Why not 4ph or 5ph??..

Answer / deepak

in case of 4 phase ,phase difference will of 90 degree
whose resultant value leads to zero.

Is This Answer Correct ?

0 Yes

6 No

Post New Answer

More Electrical Engineering Interview Questions

how the rotating magnetic fieldis produced in induction machines??? give the correct explanation.is there any mathematical expression for the same?

1 Answers

What is the funstion of buscoplure in LT panel? which propouse using the buscoplre

2 Answers

what is battery impedance testing and how we perform this test with four wires.

1 Answers Etimaad, MRF,

State the other types of Air Conditioners?

0 Answers HSL,

how choose conductor&depending upon load

0 Answers Ford, HCL,

I want to do a mini project. Now I'm studying in 6th semis tor EEE Engineering.

0 Answers

What is inverse definite minimum time lag relay? Where is it use?

0 Answers TATA,

what is use of stater and choke in tube light.?

2 Answers Aditya Birla,

How to calculate the current carrying capacity of electrical cables

16 Answers Barqaab, Grasim, Havells, HM Cables, Janapriya, Polycab,

How will you justify IR value and Charging voltage of any motor,transformer and Cables.......???? . . . . . . . . Plz tell me any body Baljeet Singh, engineer_89@refiff.com

0 Answers

Please mention available current rating for MCB,RCCB,MCCB in the market or any website

1 Answers ETCO,

A synchronous machines has higher capacity for (1) Leading power factor (2) Lagging power factor (3) Does not depend upon the power factor of machine (4) None of the above

2 Answers JSW,

For more Electrical Engineering Interview Questions Click Here