FIELD OF INVENTION
The present invention relates to a compact insulator for gas filled equipment adaptable to electrical equipment /devices.
BACKGROUND OF THE INVENTION
Existing support insulators used in gas insulated electrical equipments/devices are generally molded from different grades of epoxies using dies and mould. Epoxy insulators are generally shaped mostly in the form of a single cone configuration. In few cases double cone (refer Fig. 1) configuration using only solid dielectric are used where the dielectrics properties of the epoxy and filler material decides the insulation strength for the insulator.
The molding process of the epoxy insulator plays a major role in the electrical performance of the said insulator. Blow hole formation during molding and improper distribution of epoxy/filler material are the major common defects in the molding process which contributes to inferior electrical performance of epoxy insulators.

OBJECTS OF THE INVENTION
Therefore, one of the objectives of the present invention is to propose a compact polymeric insulator for gas filled equipment which eliminates the disadvantages of prior art.
Another objective of the present invention is to propose a compact polymeric insulator for gas filled equipment which is used for application (Bus bar support, barrier insulator) in gas insulted electrical equipments/devices.
Yet another objective of the present invention is to propose a compact polymeric insulator for gas filled equipment with improved insulation strength by means of deployment of conical hollow chamber within the said polymeric insulator.
A further objective of the present invention is to propose a compact polymeric insulator for gas filled equipment where high electrical stresses from the relatively low dielectric strength solid insulating materials are transferred to a relatively high dielectric strength gaseous insulation.
A still further objective of the present invention is to propose a compact polymeric insulator for gas filled equipment where any change in the designed dimensions can be easily attained by machining out the insulator out of an extruded/molded rod unlike a molded insulator where any change in design dimension necessarily calls for change in modification in the die and mould.

BRIEF DESCRIPTION OF THE ACCOMPANYING DRAWING
Fig-1 shows a schematic diagram Art
Fig-2 shows a schematic diagram of polymetic insulator with gas filled conical hollow chamber as per invention
BRIEF SUMMARY OF THE INVENTION
The present invention is
1. Related to a compact polymeric insulator(Ref.l of Fig.2) with a conical
hollow chamber (Ref.2 of Fig.2) filled with the gas used in the gas filled
equipment/ device.
2. Effecting support to the HT bus bar (Ref.3 of Fig.2) at both ends of the
polymeric insulator.
3. Enforcing a gas insulation in the high electrical stress zone between the
H.T.support conductor and polymeric insulator.
4. Replacement of a part of the solid dielectric with a conical hollow
chamber of the polymeric insulator filled with gaseous dielectric.

5. Assists in obtaining improved high voltage withstand levels for the same dimensions of an epoxy insulator without conical hollow chamber.
KEY FEATURES
Reference Character Figure
Numbers
1. Polymetric insulator 2
2. Gas (Conical hollow chamber) 2
3. HT bus bar 2
4. LT 2

WE CLAIM
1. Compact polymetric insulator for gas filled equipment comprising :-
- an in-built conical hollow chamber (2) inside the polymetric
insulation;
- effective support to the H.T. busbar (3) at both ends of the
polymetric insulator (1);
- enforcing a gas insulation within the conical chamber between the
H.T. bus bar (3) and polymeric insulator (1)
2. Improved high voltage withstand capability of the polymeric insulator in
comparison to epoxy insulator with same overall dimensions and with
only solid dielectric used for insulation.
Dated this 21st day of May 2008
OF L.S.DAVAR & CO. APPLICANTS ' AGENT

The present invention is
1. Related to a compact polymeric insulator(Ref.1 of Fig.2) with a conical
hollow chamber (Ref.2 of Fig.2) filled with the gas used in the gas filled
equipment/ device.
2. Effecting support to the HT bus bar (Ref.3 of Fig.2) at both ends of the
polymeric insulator.
3. Enforcing a gas insulation in the high electrical stress zone between the
H.T.support conductor and polymeric insulator.
4. Replacement of a part of the solid dielectric with a conical hollow
chamber of the polymeric insulator filled with gaseous dielectric.
5. Assists in obtaining improved high voltage withstand levels for the same dimensions of an epoxy insulator without conical hollow chamber.