ravs42

 Profile Answers by ravs42 

• Aug 6th, 2010

 

It occurs mainly due to laminations and winding i.e. mechanically rattling of the 2. Also presence of DC components supports it.

raviiisc

 Profile Answers by raviiisc 

• Sep 8th, 2010

 

The humming in transformer is mainly due to the phenomena of Magnetostriction which occurs due to poor core staggering means some gaps in between the laminations of core .

ravikaurase

 Profile Answers by ravikaurase Questions by ravikaurase

• Nov 10th, 2010

 

TF wdg is on core. If the cores are having little bit space, then while flowing current these cores get vibrate which causes transformer humming.

bittu123

 Profile Answers by bittu123 Questions by bittu123

• Nov 9th, 2011

 

Humming sound caused by magnetostriction phenomenon. Magnetostriction is change in physical dimension of material because of change in magnetic field.

Since, there is varying magnetic field in transformer causes vibration of core in gap available due to bad insulation. and starts soud hum

Krishna Kant Gupta

• Mar 13th, 2012

 

Humming sound in the transformer is due to the stray losses in the transformer due to the leakage flux.this flux produce eddy currents in the nearby conductive areas.The humming sound is the result of stray fields causing components of the tank to vibrate and is also from the magnetostriction vibration of the core.