• Skip to primary navigation
  • Skip to main content
  • Skip to primary sidebar

How Engineering Works

  • Home
  • MCQ
    • Electrical MCQ
    • Civil MCQ
    • Mechanical MCQ
  • Interview Questions
  • About Us
  • Privacy Policy
  • Disclaimer
  • Contact Us

What is the difference between single phase and three phase?

February 5, 2018 by Olive

DWQA Questions › Category: Switchgear and Protection › What is the difference between single phase and three phase?
0 Vote Up Vote Down
Olive asked 5 years ago
2 Answers
0 Vote Up Vote Down
admin Staff answered 5 years ago

Single phase and three phase are the parameters in electricity… Single phase has a voltage rating of 220-230v wit 50 Hz freq in India. And three phase is 415v wit 50 Hz freq India.

Well in single phase there is one phase and one neutral i.e. P and N while in three phase there are three phases i.e.R,Y,B and a neutral both are dislaced by 120°each.

This is the main difference between single and three phase. And in three phase there are two ways to connect the three phases one is star and another one is delta. In star each phases of one end are connected at one point which forms neutral. In delta each phase is connected to end of other phases so thus it forms a closed path with no neutral.

Three phase is economical in operation and used in transmission and large machineries,while house holds use single phase.

You can also Read :
Interview Questions
MCQ or objective

0 Vote Up Vote Down
admin Staff answered 5 years ago

One of the major difference between the single phase and the three phase is that the single phase consists one conductor and one neutral wire whereas the three phase supply uses three conductors and one neutral wire for completing the circuit.

You are welcome to read more Important Interview Questions and MCQs.

Primary Sidebar

Related Questions

  • What is Buchholz relay? Which equipment is protected by it? asked by admin
  • Why is the earth pin on a three pin plug made longer and bigger than the others? asked by admin
  • Why are overhead transmission lines not insulated? asked by admin
  • What is an autorecloser in electric power distribution? asked by

INTERVIEW QUESTIONS

MCQ or Objective


Recommended Post

Electrical energy

MCQs on Electrical Circuit Theory

MCQs on Special Motor

MCQ on Engineering Materials – 4

MCQs on Transformer

Categories



Join Our Whatsapp Group


About Us | Privacy Policy | Disclaimer


Copyright@ Since-2017