Answer / ziyad

there is no engineering reason for that.
the reason is economical.
since they start generating by three phase and the following
designs was based on the first models, and it is difficult
to change the system that already exist so they continue to
design three phase generators and transmission systems.

Answer / ben

IN CASE OF 3PHASE SYSTEM,LENGTH OF CONDUCTOR NEEDED IS LESSER,,ALSO REGULATION IS GOOD IF WE USE 3PHASE..

Answer / manikandan

3 phase system generating & transmission is economical,all
the machinerys are working in 3 phase supply ,so why to
generate 4 phse& 5 phase,if generate 4phase the
transmission &distribution is very difficult

Answer / srikant

DEEPAK sir
what r d reasons 4 it being highly efficient.pls ellaborate

Answer / ganesh

because the 3 phase
tends the 120 deg
phase sequence to
the high loads

Answer / ashok mishra

because it is easy as generate as of 120 degree angle

Answer / deepak24

it is because three phase system is most efficient system.

why AC cannot to be stored and DC cannot be transmitted?

11 Answers   IBM,

In my 3 phase 4 wire electrical system N to earth voltage is 0.08 is it ok What is standard for it ?

1 Answers   Kay Bee,

The ohm is the unit of:(a) Charge(b) Resistance(c) Power(d) Current

2 Answers  

What is synchro?

0 Answers  

How much costly in percentage wise is sandwich busduct costly than air insulated busduct of any rating?

0 Answers  

why the secondary winding of the transformer is not open circuited ?

5 Answers   Nepal Electricity Authority, Torrent Pharma,

how one can know the charging time, discharging time of a 12 VDC battery ? If i have a battery of 12 VDC , 4.0 AH , how long will it take to charge from a charger (power supply) of input 220 V , Output 15 V and output current of 3000 mA and how long will it take to discharge whether using or not ? How much backup will it give ?

1 Answers   ONGC,

Name of Hydrocarbon gases.

1 Answers  

How will earthing is making for Aeroplane?

5 Answers  

what is the rating of boiler?

4 Answers  

Why we cant store an ac power. If we coo store in which device we can?

0 Answers   Jindal,

How to resolve if Diesel generator stop while running ?

0 Answers   Toyota,