if single phase is having 220v supply then why three phase is having 440v instea

if single phase is having 220v supply then why three phase is having 440v instead of 660v?

Question Posted / ranjanatwr9@gmail.com

4 Answers
8560 Views
C&S, NTPC, I also Faced
E-Mail Answers

Answers were Sorted based on User's Feedback

if single phase is having 220v supply then why three phase is having 440v instead of 660v?..

Answer / gaurav kumar

in case of 1 phase the voltage is measuered between one phase wire and another neutral. And called phase voltage. Whereas in 3 phase line voltage is measured and used

Is This Answer Correct ?

4 Yes

2 No

if single phase is having 220v supply then why three phase is having 440v instead of 660v?..

Answer / rinkesh

I phase = 220(I line) × 1.71 (root 3 )

Is This Answer Correct ?

1 Yes

1 No

if single phase is having 220v supply then why three phase is having 440v instead of 660v?..

Answer / sanjeev

voltage means potential difference between two points. In case of single phase potential difference between phase and neutral is 220v.
in case of three phase(R,Y,B) potential difference between R & Y is 220 and Y& B is 220

Hence the voltage offered by a three phase(LT) system is potential difference between Three phases i.e. 220+220=440 volts.

Is This Answer Correct ?

0 Yes

2 No

if single phase is having 220v supply then why three phase is having 440v instead of 660v?..

Answer / m.md rafi leo

In 3 phase supply any one line act as neutral

Is This Answer Correct ?

8 Yes

16 No

Post New Answer

More Electrical Engineering Interview Questions

If ac 230volts inputsupply to full wave rectifire what is D C output voltage.

3 Answers

if we convert Ampers into kva,which one formula use by us,pls tell me?

10 Answers ABB,

I have calculated load for an office building which is 1200 KW as all the load is single phase therefore its 1200 kw single phase. Now i have to design Transformer and Generator for this load Please kindly give me exact answer that how much capacity of Three Phase Transformer and Three Phase Generator is required for this load.

3 Answers

What is d role of reactive power in power system??How it produce & consume?

5 Answers ABB,

Why the cost of CT increases with the decreasing of its CT Ratio (Technical Reason)?

2 Answers Vedanta,

What Is Connection APFC Panel In Compony.

0 Answers

which network topology offers the greatest level of tolerance?

0 Answers

What is static Device & Mechanical device? Is transformer a static device?

5 Answers ABB, Emco,

why is power supplied in 3 phase only? why not in 2 or 4 phases?

11 Answers

railway exam in asst loco pilot old test paper

25 Answers Indian Railways, Loco Pilot, RRB, Southern Railways, TATA, Vimal,

WE know that for Inductor X=2pifL,In DC f=0,then X=0 so,V=IX=0;But In the DC excitation of rotor of AC generator,DC motor field coil which coils are inductor so why does not applying DC voltage short the rotor coil of AC generator and field coil of motor?If it would then DC source might be damaged but it is not happened. Why does the strand conductor of Electrical power transmission line make twist?

0 Answers

WHAT IS A DIFFERENCE BETWEEN A DC GEAR MOTOR AND STEPPER MOTOR.AND WHICH IS MORE APPROPRIATE TO USE FOR POSITION CONTROL PURPOSE?

1 Answers

For more Electrical Engineering Interview Questions Click Here