where we use 1 phase & 3 phase supply ?what is major advantage using 3 pha

where we use 1 phase & 3 phase supply ?what is major
advantage using 3 phase over than single phase ?

Question Posted / kumar

3 Answers
6366 Views
I also Faced
E-Mail Answers

Answers were Sorted based on User's Feedback

where we use 1 phase & 3 phase supply ?what is major advantage using 3 phase over than single ..

Answer / subhamoy chandra

The major advantage of using 3ph over single phase is that
we can have more voltage and more power.

1ph is basically used in small rated machines.

Is This Answer Correct ?

9 Yes

1 No

where we use 1 phase & 3 phase supply ?what is major advantage using 3 phase over than single ..

Answer / mahavir jagdev

1. lesser current (hence smaller capacity wiring) for same load

2. balance load on the bus bar

Is This Answer Correct ?

3 Yes

3 No

where we use 1 phase & 3 phase supply ?what is major advantage using 3 phase over than single ..

Answer / b. salazar

Three phase requires less current than single phase. The more power, the more likely you will need to use three phase. The reason is the physics of the source of electricity. Basically, a single phase circuit experiences 0V for a very tiny amount of time in each half cycle. Building up from 0V takes energy and thus requires more current. Three phase phases individually experience a 0V period, but the other phases do not hit 0V at the same time. This means that there is no build up of power in every half cycle. This need for increased current is negligible for very small machines. The larges sing phase machine in the NEC is 10 HP which requires 50A at 230V, but 10 HP at 230V three phase only requires 28A.

Is This Answer Correct ?

0 Yes

0 No

Post New Answer

More Electrical Engineering Interview Questions

What is Load sharing of Transformer ?

0 Answers

10Hp, 3-phase, 415v, 50Hz induction motor. The above motor is to run on Star-Delta connection, so how do i make following hardware selection 1) MCB, 2) Contactor, 3) Wire Gage (Depending on P-P current or Line Current), 4) OLR, Please tell in detail how to do the above, so as to get the ans. of it even if the Hp rating changes.

1 Answers Engro,

WHAT IS M.P.C.B

3 Answers

what is the main purpose of line PT and bus PT?

11 Answers L&T,

how to calculate micom relay earth falt time and current sertting

0 Answers

What is best method of Calculating Short Circuit current in power system network.

1 Answers

What is the type of earth fault protection used in battery? explain.

0 Answers PSEB,

Why 11KV/440V distribution supply use for Domestic use?