What is the difference between earthing and grounding
When should I use any of both? Thanks

boe

• Aug 8th, 2013

Ground and earth is basically the same thing. Its all about providing the least path of resistance to the earth mass. Neutral is connecting the star point of three phase equipment out which serves as a return path for the flow of electricity.

jayashree priyadarsini

• Aug 4th, 2013

1.grounding means connecting the live parts of the equipment to the earth where as earthing means connecting the dead parts of the equipment to the earth. 2.grounding provides return path for the f...

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if i generate 1 volt a.c. and with a 1:240 transformer , i step up it to 240 volts then can i lit a 100 watts (240 volts , rated) bulb at its full intensity, from the output terminals?
if not then why?. What are the parameters limiting this to happen? the windings,?wires?,source? or what? plz help

i don't have a new transformer, but tried this with a rusting transformer (10:400),...

boe

• Aug 8th, 2013

You should have stepped it up to a higher voltage level then finally stepped it down to this desired voltage level, because stepping up to the actual voltage you need may give u a lower voltage level due to losses in the transformer, and losses in the wires you used in connecting

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Why isolation tranformer used in mcc panel?

Niaz

• Jul 14th, 2013

Isolation transformer at MCC are usually Y-Delta connected, so a fault on low voltage Y side would not travel towards high voltage delta circuit, so providing isolation to HV side

Raman Jain

 Profile Answers by Raman Jain Questions by Raman Jain

• Dec 3rd, 2012

To reduce the fault level.

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What is Earthing Resistance?

farhan

• Jun 27th, 2013

Question:- what is earth risistance.explain the earth risistance with the diagram

sushree16

 Profile Answers by sushree16 Questions by sushree16

• Feb 1st, 2009

It is used to reduce the damage on an earth fault. It capture the fault current when fault occur so that the extra current will not flow in the equipment in this way equipment is protected.

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Why capacitors are used in 1 phase induction motors?

SONY RANJAN MAHAPATRA

• Jun 25th, 2013

Basically function of capacitor is to improve the power factor and make the single phase motor self start having made split phase between both the winding(starting & running winding)

shaik sharif

• Jun 5th, 2013

In generally capacitors are playing main role in electrical system.And also power factor improvement done by capacitors so therefore capacitors mainly using for increase the starting torque of the motor.

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nishchay shakti

• May 14th, 2013

In transformer emf is induced in primary or secondary due to self inductance & mutual inductance.flux is due to the self inductance is known as leakage flux,because it doesn't participate in transfer the energy from primary winding to secondary winding .

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pratap

• May 11th, 2013

As the transformer rating depends on cooling system and better cooling system gives higher rating of transformer. Heat caused by the losses occurred in the transformer and losses depends on both volt...

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SONI RANJAN MAHAPATRA

• Apr 23rd, 2013

As we know the main function of transformer is to transfer power from one ckt to another ..so ratio will same on both side of transformer..it only change the ratio of voltage and current .

praveen kumar

• Mar 8th, 2013

Power is same, so the ratio is 1:1

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What is the difference between Earthing and Grounding?

soni ranjan mahapatra

• Apr 10th, 2013

actually there are no such difference between earthing and grounding. Earthing word we use with our installation equipments in domestic as well as in substation,grid etc. And if due to some fault occu...

Dayo

• Mar 26th, 2013

Like bttu said, there is no difference between them and you can also add bonding to the group. earthing is basically used in britain and few commonwealth countries while grounding is used in america.

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manohar

• Mar 29th, 2013

The maximum voltage applied on transformer so that it can withstand without any damage (insulation, winding breakage etc.)

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Why do not we use salient pole alternators in thermal power stations?

umeshprabhu

• Mar 11th, 2013

The Salient pole alternator because of its large diameter and short axial length takes more time to complete one revolution for a pair of poles under a coil, so the frequency of induced emf which is p...

cmallick1201

 Profile Answers by cmallick1201 Questions by cmallick1201

• Jan 8th, 2013

Salient pole rotor has larger diameter than cylindrical rotor. In thermal power plant rotor should rotate in high speed so that salient pole will unstable due to larger diameter so that we cant use salient pole in thermal power plant.

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soomnath paul

• Feb 2nd, 2013

High resistance is connected in order to make the voltage appeared across the pressure coil in phase with the applied one.

mahmoudp1

 Profile Answers by mahmoudp1 Questions by mahmoudp1

• May 1st, 2012

We connect more resistance in series to make the total resistance is high so that it wont absorb any power (amperes) for the circuit so i wont affect on the true reading and also the series coil to me...

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Can the transformer be operated on current source instead of voltage source ??if ,, what will happen ?

somnath paul

• Feb 2nd, 2013

In case of an ideal current source , it will deliver same current irrespective of the load connected to the secondary terminals thus proper transformation will not take place in order to maintain constant flux.

S.Ghosh

• May 23rd, 2012

I assume that by current source you mean constant current source. In such case the primary and secondary voltage of the transformer will depend on the impedance of the transformer and the load. The lo...

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Why people say that "When we want to send information (transfer from one pint to another) we modulate the signal below or above the center point (reference point)?1) By modulation we mean what?2. Why it is necessary to modulate signal for information center.3) Why more the modulation more informative can be send?

Eng. Maged saber

• Jan 17th, 2013

Modulation methods used because of when I need to transmit signal with low frequency it need long antenna as frequency inverse proportion with wave length and Wave length is in direct proportion with ...

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What are the flowmeter?

vikas gupta

• Jan 13th, 2013

It is the device which is used to measure the flow. Flow may be such as; mechanical optical, turbine, thermal, ultrasonic, vortex and electromagnet.

anilsabaji

• Mar 11th, 2012

Meter used to measure the flow (of liquids)

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Two electrically operated Vibro Motors are fixed in parallel direction in vibrating feeder. What is the direction of both Vibro Motors?

Padlock

 Profile Answers by Padlock Questions by Padlock

• Jan 11th, 2013

Maybe I wasnt clear on my first answer, if you have two 3 phase vibrators on say a ore feed bin they both operate in different direction ( normally indicated) the wiring connection is different how e...

linu mohan

• Dec 30th, 2012

Both motors direction is same only the counter weight mounted on shaft its angle changes. if opposite direction motor connection done then it will break foundation.

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If rotor speed will more than synchronous speed , slip will negative. and induction motor will now working as a induction generator. But how this negative slip can be maintain during its generation from IG and suggest me in details regarding operation of Induction Generator.

cmallick1201

 Profile Answers by cmallick1201 Questions by cmallick1201

• Jan 8th, 2013

Any shaft of the rotor is connect with a prime mover which is able to move the rotor greater than its synchronous speed, then negative slip can be maintained.

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sudhakar srivastava

• Jan 6th, 2013

In AC, phase is present but in DC, negative and positive terminal is present.

vishal rana

• Nov 5th, 2012

Alternating current which magnitude change with time and D.C is magnitude dose not change with time its always same.

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what is capacitor bank. Where it is used & why it is used

mrtelco1948

• Jan 6th, 2013

It is a proven fact that Capacitor banks cause an a.c. humm on copper telephone lines. In some cases, power companies have agreed to remove the capacitor banks when they caused this problem in entire neighborhoods. This was discovered by Bell Labs Noise mitigation experts many years ago.

gaurav vinayak

• Aug 23rd, 2011

capacitor banks are basically used for power factor improvement. they are used by companies distributing power, due to induction load at homes and industries, power factor lags and to correct it and b...

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What determines touch potential

Lokesh M

 Profile Answers by Lokesh M Questions by Lokesh M

• Jan 3rd, 2013

You create a low-impedance path by bonding the metal parts of the electrical system and the grounded (neutral) conductor. You can achieve a touch potential of < 50v by reducing the resistance between...

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