Why we use three phase world wide why not four phase or
five phase being used?

Answer Posted / hem

3phases are adequate
to produce rotating
magnetic flux in
induction&synchronous
motor and no need for
further phases as well
as economically

Is This Answer Correct ?    0 Yes 5 No



Post New Answer       View All Answers


Please Help Members By Posting Answers For Below Questions

if there are six generators (3 gas CATT, one Jenbacher o1 MW each, and two nos Diesel 01 no 01 mw other 0.65mw EDGs ( say), 3 CAtt gas set have identical pole pitch,01mw EDG and Jenbacher gas Set have different pole pitch, how their power connection can be done to connect a common bus bar during installation. in short, how different pole pitched generators power connection can be done to connect a common busbar system through generators incomer ACBs.

1248


UG cable sizes were specified in sqmm. But practically its not coming to mesure. What's the reason for that? And how they specify the size of the cable?

1578


How the frame size of a flange mounted AC induction motor is calculated?

1609


How can we convert 11 kv to 440 volt without using transformer ?

1085


Mention what are the types of semi-conductors?

826






Where I can get the sample question for post of Junior engineer electrical-II For RRB Bhubaneswar.

1804


Hi.. I am a BE GRaduate in E&E. I have 8.5 Experience in Tendering & Estimation field. I have done SAP SD course few years back. But due to some reason i failed to get job in that field and continued my own field. Now I am thinking of changing into SAP seriously. How should i go ahead???

1584


how oti and wti connections are different from each other?

1690


how we select ac fuse rating of an power inverter???

1495


What id difference between power and energy?

772


advantage and disadvantage of team work?

1354


How many points does a Circuit can have?

1533


working principles of cf lamp,incandescentlamp and f lamp?

1932


How to calculate the fuel consumption for 600kva DG genset which connecting with 25%load?

1806


WHat is the general checks required for Dry type transformers

1734