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

Answer Posted / 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



Post New Answer       View All Answers


Please Help Members By Posting Answers For Below Questions

The loads are connected with phase and ground then why current flow as the loads ?

1472


What do you mean by per capita requirement of electrical energy in india

1647


what will be d.g. capacity to cater together for 14hp A.C. load & 3kw lighting load

1547


Why LED light has advantage of rapid reflection ,although other lights alse reflect.? and this light is considered to be best for transmission usage in case of Free optics

1578


What is the method of estamating of cable, CB,MCB ?

1670






What are the different types of LT Cables?

614


How to find out damper winding failure for synchronous machine?

993


Difference between HRG and NGR. Are they both the same thing

3639


for a 500 KVA connected load, I calculated 30% of capactor for power correction. Even after using 225 KVR capactor PF is not improving. What could be reason for low Phase correction factor?

1524


How to prepare electrical preventive maintenance plan & shedule of machine tools in manufacturing unit.

1705


physical identification of HT & LT panel

1200


when we have to use UPF wattmeter and LPF wattmeter? what is the difference between UPF and LPF wattmeter in terms of construction?

1917


How 48-relay (incomplete sequence) functions?

3544


which metal is use in shunt

5217


at work i have a genertor/alternater what is the easyest way to work out if it is dc or ac?

1373