An overexcited alternator gives current at which power factor?Why?

Tuleswar Patel

• Apr 15th, 2015

As it is driving current i.e graeater than the rated value the pf will be leading .

satyam

• Mar 21st, 2015

It will operate in leading power factor, it is also called synchronous condenser.

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abhishek

• Apr 12th, 2015

Neutral is the return path of the conductor through which current flows back to the system, however earth is used for protection against high fault currents. when the current is very high it flows through earth and bypass the equipment thus protecting it.

hari

• Mar 27th, 2015

We know about that the neutral and ground is almost same means but in this most difference is neutral may be earth but we didn't say that earth is neutral. neutral some current have as 0.0000001Amp bu...

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What is the diffrence between Altrnator & Generator? Outline its working principal.

satyaprakash sahu

• Apr 12th, 2015

As the main difference between alternator and generator is that field winding(poles) in a generator are present in stator i.e is fixed and armature winding is rotating whereas in a alternator the pole...

nimmala rakesh

• Mar 28th, 2012

Alternators and generators are the two devices which generates electricity.. the function of these are same but the construction of it is different. in alternators the armature is stationary and the m...

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abbasanwarali  

 Profile Answers by abbasanwarali Questions by abbasanwarali

• Member Since Oct-2008 | Oct 16th, 2008

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Actually there is no volt during normal condition. In case of any fault resistor will act as a low resistance path. because above mentioned components are high impedence components. so the huge fault (volt) will be grounded and the equipment remains safe.

HARESHKUMAR KHATRI

• Apr 4th, 2015

Absolutely there is no any voltage.

Rahulshelke

 Profile Answers by Rahulshelke Questions by Rahulshelke

• Jul 12th, 2010

The voltage is null or Zero.

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what is harmonic and how it is generated? Is it useful to us?

surendar

• Apr 1st, 2015

Harmonics are nothing but multiples of fundamental frequency components. they are not useful because the overall output deceases due to harmonics.

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We know synchronous machine run at a constant speed.Consider Synchronous motors, If you load the machine, will the speed reduce? If it does so, then it prohibits the property of synchronism. So Explain What is happening?

maverick

• Mar 28th, 2015

In synchronous machine speed always remains constant even when load on it changes. For increased load motor develops increased torque because of rotor falling out of phase by large angle delta; which...

bittu123

 Profile Answers by bittu123 Questions by bittu123

• Nov 10th, 2011

Even if you increase the load on synchronous motor upto specified limit, SPEED will NEVER fall down(unlike dc or induction motor), while maintains synchronous speed. BUT why??? It takes more current ...

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Difference between pi and pid controller

shreya

• Mar 28th, 2015

Pi is nothing but the proportional integrator controller.it is used improve steady state stability i.e used to reduced steady state error.and pid means proportional integrator and derivative controlle...

Rakesh

• Mar 23rd, 2015

Power system is technology to transporting the energy to industry and home .And the power system basically work on three principle Generation,Transmission,and distribution.

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Why induction motor rotates anticlockwise?
indetail

prakash perumandla

• Mar 23rd, 2015

In order to achieve minimum relative speed b/w rotor current and stator magnetic field induced.

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sandeep chauhan

• Mar 16th, 2015

There is no similarity in Neutral & Earth , i.e these are the two different topics.

However , Neutral is connected to Earth at the source to ground the unbalanced current in the electrical network mainly in distribution system

Karuppiah arumugam

• Feb 18th, 2015

In distribution t/f ?earth is acting as neutral?

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What is universal motor?

kvramana

• Mar 14th, 2015

A series motor operates on both ac and dc is known as universal motor

S.Rajendar

• Feb 3rd, 2015

The motor which work as a.c as well d.c

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panneer

• Mar 11th, 2015

Scott connections is used to convert either 3 phase to 2 phase and viceversa

p.srikanth reddy

• Jan 29th, 2015

It is used to convert 3-phase supply power to 2-phase power supply

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I am confused about the path of current in domestic loads . In the negative cycle does the current flow from neutral to the phase.wont the whole system get grounded then if we use a single phase ground return?

ashish gourav

• Feb 14th, 2015

friend,the supply you get at home is single phase i.e 1hot and1 neutral wire.3phase system has 3 live (hot)wire and 1 neutral.Under ?balanced condition there should be no current in neutral wire of 3...

S J DREYER

• Feb 8th, 2015

Electricity is quite the same as lightning and wants to discharge to the greater earth ,ie the core of earth. The N or neutral wire is also a earth that is insulated from all else so that a safe path...

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Why covered with alluminium on both end of the induction motors rotor? and what is the uses for it?

parshv

• Feb 12th, 2015

In the I.M. rotor consists of uninsulated copper or aluminium bars called rotor conductors. The bars are placed in the slots. The bars are permanently shorted at each end with the help of conducting c...

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Why three phase motors are designed for 415 Volt AC in place of 440 Volt AC

yaswanth kumar

• Jan 28th, 2015

If motor is designed to operate exactly at 440v during low voltages(i.e,below rated voltage)the motor will draw high currents which damages the winding.so,the motors are designed to 415v (nearer to rated voltage).motors are usually designed to withstand increase or decrease of rated voltage to 5%.

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Rakesh

• Jan 28th, 2015

There is no difference between the two. Perhaps the word potential was adopted as the capacity (force) to do work. The word voltage is perhaps in memory of great scientist "Volts. There is third word also. It is called EMF (Electro Motive Force). It is also same.

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How can we find u1,v1,w1 and u2,v2,w2 in three phase motor when operating in delta as we have on identification on motor lead which comes out from winding.

siddharth

• Jan 27th, 2015

P=VI,
V=I/R,
cu.losses=I*I*R

bineet

• Jan 4th, 2015

How to check the Windings of a 3-Phase AC motor The rotor of a squirrel-cage motor There are several different AC motor types, each one with different operating and mechanical characteristics. The mo...

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pralhad

• Jan 25th, 2015

At the time of British rules the standard equipments designed in India are for 50hz so the power is also generated at 50 hhz...and now its impossible to create new equipment which will run on other frequency

jyotsna

• Jan 15th, 2015

Because all the equipement based on 50hz frequecy na our country economical condition is not good and when we required more than 50hz frequecncy then all the equipment are failed

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What is static synchronization? when we use it?

JimmyBigballs

• Dec 22nd, 2014

Taking off a Woolley jumper to quickly!

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