If we connect more than one end what will happen?

Prabhu

• Aug 8th, 2011

If ct is having double earthing means, the ct secondary current will circulate between the two earthing point, not circulate the circuit, due to that always ct secondary is having single earthing only.

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What is the necessity of harmonics in electrical field?

Friend #1

• Aug 9th, 2011

I'm assuming you're talking about electromagnetic fields here. The harmonics in an electrical field has to deal with eddy currents at different frequencies (especially high ones). This is more easily ...

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Normally we represent the three phases, RED, YELLOW, BLUE for identify the phase shift of the phases.
Why not other colors, any reason for that? Or “R Y B” colors are the basic colors.

Ibrahim Baklawa

 Profile Answers by Ibrahim Baklawa Questions by Ibrahim Baklawa

• Aug 15th, 2011

According to The United Kingdom Electrical Code

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What is the distance between R, Y and B wires when the line is going from one sub-station to another sub-station?

SAUNAK NANDY

• Aug 31st, 2011

The distance between R,Y and B wire should be of 120 degree phase difference.

gowtham

• Aug 26th, 2011

55cm

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SHATAKSHI

• Sep 2nd, 2011

You should be able to fully explain whatever you have written in your CV.

veena_gyanchandani

 Profile Answers by veena_gyanchandani Questions by veena_gyanchandani

• Feb 24th, 2010

First of all You should be confident for yourself.You should know about the company profile in which you are going, and why you want to join that company, what is so interesting about that company?If ...

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Can anybody tell me that how to choose CT for a specific load? I have a 200kw induction motor, which ratio CT should be installed? Is there a formula or calculation that determines the CT ratio for a load?

Nishant Vadhavana

• Sep 5th, 2011

What is the voltage level of Motor--415 v or 11KV or 6.6 KV Based on that find its full load rating Check the application of CT - metering or protection as it defines its saturation limit Check what s...

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bharath

• Sep 8th, 2011

It is the unit of power and used to specify the rate of electrical energy is dissipated.

ramesh_1686

 Profile Answers by ramesh_1686 Questions by ramesh_1686

• Sep 7th, 2011

Watt is the unit of power.
1 watt= voltage x current x power factor

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vipul prajapati

• Sep 12th, 2011

It is the machine for the purpose of lapping.Lapping is a machining operation, in which two surfaces are rubbed together with an abrasive between them, by hand movement or by way of a machine.

sujay chavan

• Sep 9th, 2011

Lapping is a machining operation, in which two surfaces are rubbed together with an abrasive between them, by hand movement or by way of a machine.

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RAVI KUMAR

• Sep 14th, 2011

control panels are used in substations ... use is for monitoring of power system... controlling of real and reactive power flow is also done from the control panel... in case of occurrence of fault...

rahulr30

 Profile Answers by rahulr30 Questions by rahulr30

• Jun 8th, 2008

Control Panels literally help in controlling power supplied. It helps in protection and cntrols the various CBs and other protection Equipments. It hac Current relays etc to sense the current.I also helps to pinpoint the location of faults in feeders.

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What do you do if your DG Set is not taking load?

Dineshkumar

• Sep 17th, 2011

First check the AVR working properly or not if DG Have no Output means AVR is faulty.

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When a conductor placed in a rotating magnetic field, what is the action inside the conductor (basis of electrons /charge) ?

R.Shrikant

• Sep 22nd, 2011

When any conductor comes under rotating magnetic field , principle of induction satisfies which energies the electron of conductor and start flowing through it by process of conduction.

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Why the reactive componet is generated in power system?

bittu123

 Profile Answers by bittu123 Questions by bittu123

• Nov 10th, 2011

If alternator is Overexcited, it will deliver reactive power with lagging current while in Underexcited, it absorb reactive power with leading curreent But, it always(under or over-excited) deliver ...

Sagar_upadhyay

• Sep 25th, 2011

In most of the power stations, the generation takes place by synchronous generators. The synchronous generators are doubly excited in nature. When the rotor is fed with a DC field, power is generated....

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What are the various types of LT panels? Name them.

Nisar shaikh

• Sep 25th, 2011

Properly Earthing and Bus bar side some Gape and properly insulation
Total load Distribution system
Power factor properly Automation system
Properly switch system

psolinter

 Profile Answers by psolinter Questions by psolinter

• Jul 14th, 2009

Low tension control panelMCC and PCC

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what is lightning Arrester? what the use of this in substations?

rakshay sharma

• Oct 18th, 2011

LA-- nothing but a metallic conductor provided with grounding, to arrest natural lightnings, in order to protect electrical equipments.

mahesh

• Oct 14th, 2011

Lighting arrester are used at substation to protect the transformers from surge currents and pass the surge current to earth

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bittu123

 Profile Answers by bittu123 Questions by bittu123

• Nov 7th, 2011

I went through all answer, seems all are correct.... But lemme be more precise.. Except transformer..... 1. CHOPER: It is said to be DC equivalent of AC transformer, so can be used to increase and d...

santosh

• Nov 7th, 2011

We can step up and down dc voltage using chopper circuit

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What is the technical difference between earth fault and earth lekage relays ?

bittu123

 Profile Answers by bittu123 Questions by bittu123

• Nov 8th, 2011

Earth fault : If live wire gets touched to the earth, heavy current start flowing through this wrong path, causing short circuit and considered to be a kind of fault. Earth leakage relay: Instrument ...

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Why current coil and pressure coil of wattmeter is connected in different phases for reactive power meaurement?

bittu123

 Profile Answers by bittu123 Questions by bittu123

• Nov 8th, 2011

You have to draw a phasor diagram. then U will get it easily. Draw Vr, Vy, Vb with 120 degree displacement. Now draw Ir leading(lagging) Vr by some angle, Say 0. and Iy displaced 120 degree to Ir, sa...

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What is the difference between American and Indian distribution system? Which one is better and why?

bittu123

 Profile Answers by bittu123 Questions by bittu123

• Nov 8th, 2011

AMERICAN : frequency 60Hz House hold voltage: 120v and 240v Split phase 3 wire service INDIA: frequency 50 Hz House hold voltage : 230v and 4...

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Why Phase Advancer is not used in below 200kva machine?

bittu123

 Profile Answers by bittu123 Questions by bittu123

• Nov 8th, 2011

During starting or low load condition IM works on very lagging current which results in taking high current. This sudden high current may creats transient in power system, which is undesirable. Phase ...

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Why PNPN is used as thyristor NPNP is not used?

bittu123

 Profile Answers by bittu123 Questions by bittu123

• Nov 8th, 2011

Funny, what differences PNPN & NPNP makes? If you have PNPN thyristor, its kept on table, U are seeing PNPN, right? Now, keep its back in front, whats this now? NPNP......isn't that? its not transist...

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