Advantages and disadvantages of three phase system, Physics

Assignment Help:

Advantages and disadvantages of three phase system over single phase System

A) In a single phase circuit the power delivered is pulsating. In three phase system the total power delivered is stable if the loads are balanced by the power of any one phase or circuit might be negative. So three - phase system is highly desirable mainly for power loads.

B) The rating of a given machine enhances with enhance in number of phases. For example the output of a three phase motor is 1.5 times the output of one phase motor of the similar size.

c) Single -phase induction motors, have no initial torque and so it is essential to give these motors with an auxiliary means of starting, but in case of three phase motors except synchronous motors there is no requirement of providing an auxiliary means for starting.

D) Power factor of single phase motor is lower than that of three phase motor of the similar rating (output & speed).

 

 


Related Discussions:- Advantages and disadvantages of three phase system

Determine displacement current, Show that the displacement current flowing ...

Show that the displacement current flowing between the two plaes of the capacitor is similar to the conduction current utilized in charging the capacitor.

Force, Ask An elevator cable can withstand a maximum tension of 19,500N bef...

Ask An elevator cable can withstand a maximum tension of 19,500N before breaking. The elevator has a mass of 490 kg and a maximum acceleration of 2.24 m/s2 . Engineering safety sta

Calculate the mass of a proton, The mass of a proton and of an antiproton i...

The mass of a proton and of an antiproton is 1.00728 u. Recall that the conversion of exactly 1 u into energy yields 931.5 MeV. a. Measure the mass used up when a proton and

Motion, a rocket is projected upwards with a velocity of 490. find te time ...

a rocket is projected upwards with a velocity of 490. find te time taken to reach the ground

What is the name of this phenomenon, The index of refraction of a particula...

The index of refraction of a particular medium is nearly the same for all wavelengths hence we often associate a single value the average value of the index of refraction to the me

Inductor construction, An inductor is generally constructed as a coil of co...

An inductor is generally constructed as a coil of conducting material, characteristically copper wire, wrapped around a core either of air or a ferromagnetic material. Core materia

Explain the elementary particles and particle accelerators, Explain the Ele...

Explain the Elementary Particles and Particle Accelerators More than 100 particles smaller than the proton, electron and neutron have been discovered and are referred to as eleme

How greatly does automotive oil weigh, Q. How greatly does automotive oil w...

Q. How greatly does automotive oil weigh? Answer:- As a rough guide engine oil typically weighs about 0.87 kg/litter or about 7.2 pounds per US gallon. Regrettably a rough

What is a light guide, What is a light Guide? While a number of single ...

What is a light Guide? While a number of single fibers are grouped together to create a larger diameter light conductor the resulting structure is termed as a light guide. Occa

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd