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.

1 ton aircondition(AC)consume how much watt?

6 Answers   Indus Towers,

sir what is the purpose of SF6 in HT breaker and what is the pressure should be maintain in the breaker?

2 Answers   Kirloskar,

advantage of motor design on higher power factor . normally motors are designed for .8 power factor. what is advantage of designing at .88 power factor

0 Answers  

in ring main system we use the isolater b/w transfer bus and main bus if we r not use isolatar than wat will be the effect in our sys.

0 Answers  

why most of junction box vendors providing T5/T6 Temp class jb's for T3 area any special reason?

0 Answers  

why we used.c source in the field of the alternator , why not a.c source.

1 Answers  

Why is it not possible to operate a star-delta transformer in parallel with delta-delta transformer?

1 Answers  

what is the reason for indication of light in the earth lamps of main switchboard.if there is an earth why does one lamp get dim and the other two bright.

0 Answers  

3ph line voltage 220v, how can run a 220v single ph motor or Light?

2 Answers  

why transformer are rated in kva.

5 Answers   Dalkia, Nalco,

what is star&delta connections?

5 Answers  

how to do 'pole drop test' on AC generator?

1 Answers