Home >>

Insulators Used for Conductor Sheathing - Oil, Varnish, Presspain, Chattertons Compound
Published By Gladis on 2011-10-22 94 Views


Several other types of insulating materials are

used in electrical work for purposes


other than those previously mentioned.

 The following materials can be classified under this heading:


Several other types of insulating materials are

used in electrical work for purposes


other than those previously mentioned.

 The following materials can be classified under this heading:

Oil. Certain mineral oils, which must he free form acid and alkali, posses~
excellent insulating properties. They are used in high tension switch gear to
quench the arc which forms when the switch is opened; in large transformers
they act not only as an insulating medium but also as a means of dispersing heat.
especially when used with an oil circulating system.

Varnislzes. lnsulating varnishes composed of resin, oil and thinners retain their
electrical properties over long periods under varying temperatures. They are used
for impregnating wound coils, thus protecting the insulation of the winding from
the effects of moisture; they also tend to bond together the individual turns and
give greater rigidity to the coil. Coils treated in this manner are usually baked
to expel moisture.

Varnislied Cambria. Cloth (usually closely—woven cotton) treated with insulating
varnish is extremely flexible and is used as tape to lap wound coils which are not
to be impregnated. It is also used in tubular Form, under the name of systoflex.
as insulating sleeving.

Presspa/in. This material consists of chemicallyireated paper and is used as
lining material For armature slots, field windings, etc. It is slightly Flexible, but
in due course of time becomes brittle: it has a tendency to warp and also to
absorb moisture.

Chattertons Compound. This is 21 mixture of Stockholm tar, resin and guttap
percha. lt has a low melting point and was originally used to seal the tops of
accumulators. More modern types ot` sealing compound have a bituminous base.
When required for use they are dissolved in petrol or carbon tetrachloride to
a workable consistency.


 

Post Comment Comments (0) Report This

More Articles Specially Recommended for You:

All Time Great PC Games, You Would Never Get Tired of Playing

Nowadays with personal computers becoming common in every house, the craze of PC games have mounted like never before. Even elders today are see

Written By : Gladis
How to Keep Heart Strokes at Bay

Major reasons of getting a "bad" heart   Depression: Signs of depression and full fledged depression can add to the ri

Written By : Gladis
How to Make a PWM Controller Using IC 4060

PWM means pulse width modulation, means controlling the width of the generated pulse through some means as required or desired. There are many w

Written By : Gladis
How to Make Steel Hard. how to Temper Steel

  Today whatever structure we see around us, all incorporate steel as their back bone of support. The present worlds woudn't

Written By : Gladis
How a Pyrometer Works

When treating steel for hardening it, the monitoring of the temperature becomes a prime factor. Basically a pyrometer is used for this.

Written By : Gladis
Muscle Cars Still Reign Supreme

During the 1950ís and 1960ís the big motor companies were in the middle of a car revolution. The nation was turned upside down with people buying musc

Written By :nikmahajan
Lost Planet 2 Playstation 3 (PS3) Version Confirmed

After lots of speculations, Lost Planet 2 Playstation 3 version is finally confirmed. There is no reason left now to deny Lost Planet 2 for PS3 as

Written By :nikmahajan
Lays Chips HARAAM: Propaganda or Truth?

Some days back I received on SMS and an Email saying that, Lays Chips (Masala Flavor) is HARAAM. On the back of the Lays chips “E631 Fat”

Written By :ubpl
VolksWagen Polo - The Same But Different

Despite the facts that the new VolksWagen Polo resembles the old one and that it is also similar to the VW Golf MkVI it is indeed an all new vehicle.

Written By :nikmahajan

COMMENTS



LogIn or SignUp! now to post your comments for this article.