single phase for 230 then why three phase are 440 volt

Question Posted / guest

4 Answers
18319 Views
ACIL, I also Faced
E-Mail Answers

Answers were Sorted based on User's Feedback

single phase for 230 then why three phase are 440 volt..

Answer / viswanath

Single Phase voltage = Phase voltage / sqroot of 3

Is This Answer Correct ?

24 Yes

13 No

single phase for 230 then why three phase are 440 volt..

Answer / pankaj rana

Phase means voltage.In single phase we measure the potential
difference between phase wire and neutral wire which is 230
volts.while in three phase system voltage is measured
between two phase wires which is 220+220=440 volts.In three
phase system if we will measure voltage between phase wire
and neutral wire it will be 220 volts.

Is This Answer Correct ?

25 Yes

23 No

single phase for 230 then why three phase are 440 volt..

Answer / sudarshan

three phase 230v line to line is also available

Is This Answer Correct ?

1 Yes

3 No

single phase for 230 then why three phase are 440 volt..

Answer / sethuraman.v

we can measure the voltage through multimeter (i.e)in multimeter having only two probs. so we can measure only 2phases (i.e)440V to measure the 3 phase voltage we have to use the formulae of 3 phase power (root3 VI COSO)by applying this formula we can calculated as 440V

Is This Answer Correct ?

5 Yes

8 No

Post New Answer

More Electrical Engineering Interview Questions

why do harmonics generata?

1 Answers

On which side, taps are provided in tap changing transformers and why?

2 Answers

what is the relation bw voltage and F in capacitor?

3 Answers TATA, Tata Motors,

why the secondary current transformer cannot left open

1 Answers

Whether earthmat designning is done only for sub station or it can be done for multy residential complexes also? What is the size, type & arrangement of the earth grid to be done?

1 Answers

How to calculate cable sizes in sq.mm. with using motor KW? Any formula there?

18 Answers Aswani Properties, BRB Cable, Construction, Hitachi, L&T, Microcool Systems, Nahar, NWPF, Reliance, Renault, Saha Bright Polytech, SGH, TATA, Techno Electric and Engineering, TFIL, Thermax,

why neutral and earth should not be connected on 3 phase 440v/50c/s supply at consumer side. where as on 25kv/ac/50c/s railway traction substation neutral and earth will be connected and track at substation. and track will act as neutral and earth. Reasons for this is needed urgently

4 Answers

3 ph motor connected in star delta starter. when we start the motor it run in star but when in is going in delta it trips the main incoming supply. why?

3 Answers Bajaj Hindusthan,

why 3 phase motors are preferable over single phase motors ?

4 Answers

Can anyone tell me what will happen if AC & DC supply get mixed???

9 Answers

What are the application of filter?

0 Answers

when the motor was star position that is running ok but when the motor was delta it was tripped? why?

5 Answers Nimbus, SEL Manufacturing,

For more Electrical Engineering Interview Questions Click Here