Answer / maheshreddy

In Single Phase the Voltage or current will be Zero for
every Half Cycle

In Two Phase the Votage or current in one phase is zero and
at the same time other phase also zero and one phase get
peak and other also get peak becuase the phase diffrence is
180Dec. so here also no votage of current if one is zero.

In Three Phase the Phase diffrence between phases is 120Dec
so that if one phase is zero rest of two will get some
magnetude.So here we get Voltage or current if any one
phase is zero.

So there is no need to generate 4phase and 5phase systems

Answer / mohan raj

yes,we can also generator 4ph ,5ph,... AC but it very expensive
At the mean time transmission losses in india is above 27%
of power generation at 3ph AC.
let thick about losses,no.of conductor, generator &
transformer design & manufacturing cost all those thicks.
finally in india not possible generate 4ph ,5ph,...

Answer / vinay

i want to ask how we can generate 4 phase ac i think in 3 phase thr is equal phase difference between all the phases...how can we achieve this in 4 phase ac supply but yes we can produce 6 phase 9 phase...supply

Answer / dhiren

mostly we use 1ph and 3ph and 6ph , 3ph line we can use it
as a 1ph or 3ph and also as a 6ph . so as per requirement
mostly generation is been done 3ph .

yes , generation of any phase can be done but we generate
which we required.

3ph is suitable for all so ....

Answer / a.kossay

BECAUSE THE 3 PHASE SYSTEM FOUND TO BE THE MOST ECONOMICAL
FROM OTHER TRANSFOMATION , IN SINGLE PHASE THERE WILL
ALWAYS BE MAGNETIC FORCES TRANSFORMER WALL WILL ALWAYS BE
HEATED, IN 2 PHASE SYSTEM IF A WIRE BREAK HAPPENS HALF OF
THE LOAD WILL BE DISCONECTED NOT LIKE THE 3 PHASE, AND IN 5
OR 4 PHASE THERE WILL BE ALOT OF WIRES CONNECTION AND
ISOLATORS USED WICH IS NOT ECONOMICAL

Answer / sjf

yes,we can also generator 4ph ,5ph. But phase angle also
change like 90, 72 degrees.

hi friends ,iam working as genset AVR service engineer in electrical field from past 2 yrs throughout india . i plan to shift in some other job without travelling in same field because i con't travel,i dont know what i do for that so please guide me what job is suited for me,how i can serch the job please anybody helpme iam totally confused

4 Answers  

How to determine alternating current frequency?

0 Answers  

my 10 hp submersible pump is tripping when connected through ELCB.I have checked the megger value of the coil's with body.It was found to be 0.2mega ohm.that is leakage is there.But when connected to mccb it is not tripping.no leakage current in the motor.Is it safe to connect to mccb? what are the problem's will arise if future?also tell me in ELCB no neutral is connected to motor.than how ELCB was working?

1 Answers  

what is tesla ?

1 Answers  

What is the principal of motor?

0 Answers  

what is earth resistance? how to measured? and give values at power station and mcc area?

0 Answers   Essar,

why the secondary current transformer cannot left open

1 Answers  

how to select cable size according to ampere.

1 Answers  

what is Distance protection & how did it work

2 Answers  

why transformer is giving some humming noise .....?

11 Answers   Electrotherm, JSW,

IN 1000kva transformer where the oil and winding temperature sensors is connected

0 Answers   Cushman Wakefield,

differentiate between c curve and d curve MCBS?

1 Answers