WHY HUMMING SOUND OCCURED IN HT TRANSMMISSION LINES?
Answer Posted / subhash tp
The humming sound is coming from transformer
at the time of working is due the magnetic expansion
and de-expansion at the ends of transformer cores.
At the time of working the transfomer core ends are
expanding when supply voltage occures its positive half cycle
and the transformer ends are de-expanding at the time of supply voltage occures its negative half cycle .This expansion &de-expansion is making humming sound,and also this wii continue during the transformer is working.
| Is This Answer Correct ? | 1 Yes | 6 No |
Post New Answer View All Answers
what is the formula for efficiency of francis turbine and generator for hydropower? what is best way to select francis turbine and generator?
what are the maximum available current, voltage ratings and switching speeds of the power electronic devices thyristor, power mosfet, igbt, and mct?
Can you explain about TEE protection scheme?
Iwould like to know barc interview questions
How Can you do Maintenance of ACB of 2000Amperes
What is the method for testing the differential protection stabilty in generator? When the time of starting What will happen if differentail protection connection wrong means?
why the making current is more than then the breaking current and if its true then its about a controling circuit or breaker power contact points
Sir 33kva 2 transformer load 900 amp calc 1800 amp mana jayega
full form of electrical?
How to decide DO set rating of Transformer?
how harmonics generated in induction furnance? how minimise it?
Name one of major transformer company in KSA ?
What the formula for calculating no.of earthings & size of earth strip for 100mX90m shop.
what is auto re-closer?
WHAT IS SHORT CIRCUIT STRENGTH OF 100 AMPS MCCB?