Answer / nilkanth tailor

Basically, we used ferromagentic material in core...when
magnetic flux linked with thid core..thier is some
physically expand and contract slightly with each cycle of
the magnetic field...and that effect known as
magnetostriction..(Magnetostriction is a property of
ferromagnetic materials that causes them to change their
shape or dimensions during the process of magnetization...
it was first identified in 1842 by James Joule when
observing a sample of nickel)...due to this effect causes
fluctuating forces between the primary and secondary
windings. These incite vibrations within nearby metalwork,
adding to the humming noise, and consuming a small amount
of power.

Answer / yasir wani

coz of eddy currents flowing in the core , and leakage
currents from leakage inductance to ground

Answer / srikrishna

the ansr given by mr.nilkanth is only the right ansr.
gud wrk pal.

Answer / neeraj

it is cause due to losses in winding

Answer / nishant2110

Nilkanth Tailor's answer is correct

Answer / hardip dodiya

Nilkanth Tailor's answer is 100 % correct. Gudwork Nilkanth. continue your sharing which give us confidence in Transformer Field

Answer / hemant kumar

the reason of this type of noise is due to harmonics
genrated in transformer.

Answer / ghanshyam singh

i think it is due to mechanical fault which arose while
manufacturing the transformer
due to the small gaps in the core

auto reclosing scheme for radial ehv feeder is to be implemented or not?

1 Answers   State Board,

How to check phase R,Y,B

3 Answers  

Do u know any one? how to find out in motor rated amps? formula?

0 Answers   Banking, ET,

How power factor of electric system improved?

6 Answers   Nalco,

Types of tempering of energy meter?

1 Answers   Nespak,

what are carbondioxide and dcp used in fire extinguishers

0 Answers  

What will be advantage if we put some load in neutral of grounded star transformer & loadshortcircuit current,rated current of cable & MCB with example?

0 Answers  

What is the need for checking knee point voltage for CT's?

1 Answers  

In a Impedance Based Distance Relay (Quad Characteristics) - Could there be two different Line Angle(RCA) for Ph-Ph & Ph-Gnd? If So Kindly Let me Know.. Where, What are the advantages of the same?

0 Answers  

What are the Steps for Testing of 20MVA (make:-CGL) Transformer? How many Test we have to do?

2 Answers   BSL,

what is effect of brush shift in machine?

1 Answers  

What is an Automatic Voltage Regultor & what is its use? What are the general componets we use to design an Automatic Voltage Regulator..What are the factors to be considered for its design?

3 Answers