Answer / subrat kumar das

Transformer noise is caused by a phenomenon called
magnetostriction. In very simple terms this means that if a
piece of magnetic sheet steel is magnetized it will extend
itself. When the magnetization is taken away. I goes back
to its original condition. A transformer is magnetically
excited by an alternating voltage and current so that it
becomes extended and contracted twice during a full cycle
of magnetization.

Answer / nimish

when A.C. supply is given to ferrite material there is a
change in its length this procedure is known as
magnetostriction and we know that transformer core is
consist of ferrite material and this change in length
causes humming during its running condition.

Answer / niranajn

Is because of humming sound which is an account of
magnetostriction

Answer / nani

Transformer noise is caused by a phenomenon called
magnetostriction. if we r not proporly revited iron
pieces

Answer / amresh marik

this is simply because of magnetostriction...when
A.C.excitation is supplied then due to change in its core
length a pecculier sound produced.

Answer / ajay rastogi

magnetostriction and we know that transformer core is
consist of ferrite material and this change in length
causes humming during its running condition

Answer / karthik

it indicates the oil which is used in tranaformer is less
and is insufficient for the windings

Answer / ravi chandra

transformer noise may be due to,
# Improper core insulation
# aging through continuous running condition which leads to
expansion of core material(Magnetostriction)

Generally if T/F is found noisy at full load conditions and
I think that cannot be avoided but minimized by applying
relevant lubricant over the core.

Answer / akr

DUE TO LAMINATED MAGNETICE CORE HUMING NOISE COMES IN TO
TRANSFORMERS

Answer / sanoj

While under working condition, stress is built up in the
cores and windings of the transformer. Due to these stresses
noise is produced.

Hi, I'm going to attend BHEL interview for exexutive trainee (ET ) on 22nd DEC . Till now if anyone attended the interview pls help me out regarding the interview. I'm an electrical engineer

3 Answers   Bhel,

How many kinds of E.L.C.B and how to work E.L.C.B

0 Answers   Accenture,

Sir if i have 2kv ups in which 17ah 8 battries load 600watts how much back up time i get and if i put 6kv ups with the same no of battries same amp can i get more back up time please give reply exactly what is the procedure to calculate back up time for different kv,s

3 Answers  

Hello friends i am facing one problem in lighting panel. Frequently neutral link near to MCCB is burning(firing. What may be the reason for this one. Please answer me.

5 Answers  

why rating in KVA and KVAR?

4 Answers  

phase clearance between phase to phase and earth

11 Answers  

ouestion for the post of section engineer

1 Answers   BSNL, RRB,

What do you mean by Frame 5 Gas Turbine as well as Mark II.

0 Answers  

what is the effect of constant power factor to the voltage regulation

1 Answers  

What is electrical earthing?

1 Answers  

what is the KVA formula of a three phase transformer

5 Answers  

explain in detail HV & LV bushing connection in power transformer (110 / 11 kv 16 MVA)

6 Answers   TNEB Tamil Nadu Electricity Board, wbsedcl,