Answer / deepa

it is used to prevent from shocks at fault.ie,for example
over cuttent occurs in the s/m means large amt of current
flowing,it will go to the s/m failer and shock.earthing
means the exessive current flow through neutral.

Answer / abdul wajid

Earthing is done for personel and equipment protection
purpose . Earthing provides the conducting path for fault
current through neutral to ground

Answer / nitin pulastya

Earthing is nothing but is used to remove unwanted/ harmful current/ Voltage by sending it to earth via. earth pit, either it come in the body of any instrument (washing machine, Freeze, AC or any lathe machines, electrical motors..) or in the shield of the signal cable via interference.
This is also known with different-2 names.
Like: Electronic earthing, panel earthing, system earthing, Instrument earthing, Shield earthing...... .

But the purpose is same....

This is not only to protect the Human and equipment but also for better communication in case of 4-20ma, 0-10V signals.... removed by using shielded cables with one end earthed.

Answer / chethan

it protech the human for elecric shock & equipmenent also

Answer / siva

actually earth use of leakage of current to eath pit

Answer / peer kafeel

Earthing connection is essential in all electrical installation bcoz it serves a purpose other than providing a protection against an electrical shock not only it ,it provides a safety for electrical equipments

Answer / nitin kumar

Earthing is used for balancing +ive and -ive charge. And its function is to protect faulty condition.

Answer / abhayraj

It is very simple........if u people who want to save your life and your electronic equipment and save your money the that is the reason behind earthing!!!

what is basic difference betmeen normal & flame proof motor??

0 Answers  

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1 Answers  

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1 Answers  

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Dear all, I just want to ask an expert on this forum for some insights. For the magnetic balance test, when applied voltage on a Delta-Star transformer e.g. Dyn11, the following relationships apply for HV side: 1.  H1-H2 = H2-H3 H3-H1 2.  H2-H3 = H3-H1 H1-H2 3.  H3-H1 = H1-H2 H2-H3 For the LV side also: 4.  X1-X0 = X2-X0 X3-X0 5.  X2-X0 = X3-X0 X1-X0 6.  X3-X0 = X1-X0 X2-X0 Is there a similar pattern for Y-d, Y-Y, D-d? And how about Y-z, D-z, Z-y transformers? I've tested a YNzn5 transformer and for LV side I don't see the pattern. In this particular case I got for LV side the following (see values below): H1-H0  H2-H0  H3-H0    X0-X1  X0-X2  X0-X3 128.0  119.9  7.2      29.2   13.3   15.8 70.7   128.4  59.2     23.4   22.0   3.6 7.2    120.1  128.1    13.4   29.3   15.8 What is the relationship here for LV? For row 1 I see the relationship, for row 3 I also see but it's shifted, but for row 2 I don't see such relationship. Any suggestions, answers, someone?

0 Answers  

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