CLIAMS:1. An encapsulated mould assembly for a vacuum contactor, said assembly comprising:
a mould housing having an insulating material;
a fuse means encapsulated in said mould housing;

at least two end shield cap (s) connected at the both end (s) of said fuse means for sealing high voltage zone from exterior zone, thereby protecting from the explosion of said fuse means;
a fuse adopter clamp for holding said fuse means in said mould housing, therefore, providing mechanical support to said fuse means;
an vacuum interrupter located in said mould housing for transferring current and carrying for defined time & interrupting the abnormal current;
an external mechanical arrangement for providing a drive mechanism to said vacuum interrupter;
an arc quenching device inside said mould housing;
at least three current carrying conductor (s) with a incoming terminal and an outgoing terminal for transferring current.
wherein said encapsulated mould assembly providing protection by collecting a hazards component obtained from continuous arching which causing implode of said vacuum interrupter.

2. The assembly as claimed in claim 1 wherein said fuse means is essentially a high rupturing capacity (HRC) fuse.

3. The assembly as claimed in claim 1 additionally comprising a seal acting as an end cover for said high rupturing capacity (HRC) fuse.

4. The assembly as claimed in claim 1 and claim 3 wherein said seal and said end shield cap (s) are fabricated by using said insulating material.

5. The assembly as claimed in claim 1, wherein said drive push cord mechanism providing an electrical signal with a limit switch(s) to said vacuum contactor for opening the tripping coils of said vacuum contactor , thereby indicating HRC fuse blown off.

6. The assembly as claimed in claim 1 and claim 4 wherein said insulating material is epoxy resin or the like.

7. The assembly as claimed in claim 1 further comprising an arrangement of a moulded bus bar for transferring current from one point to another point in said assembly.

8. The assembly as claimed in claim 1, wherein incoming terminal of said current carrying conductor (s) connected to said vacuum interrupter using a flexible conductor.

9. The assembly as claimed in claim 1, wherein said fuse adopter clamp connected to said vacuum interrupter at the top for providing the suitable electrical connection between said HRC fuse and said vacuum interrupter.

10. The assembly as claimed in claim 1, wherein top side of said arc quenching device connected to said fuse adopter clamp and other side of said arc quenching device connected to a flexible copper conductor.

11. The assembly as claimed in claim 1, wherein said flexible copper conductor connected to a current system.
,TagSPECI:TECHNICAL FIELD OF THE INVENTION

The present invention relates generally to a vacuum contactor with fuse assembly. More particularly, the present invention provides an encapsulated mould assembly for a vacuum contactor with encapsulated HRC fuses, therefore providing protection to human life with proper electrical and mechanical insulation.
BACKGROUND AND THE PRIOR ART
Vacuum contactors utilize vacuum Interrupter encapsulated contacts to quench the arc. This arc quenching capacity with excellent dielectric recovery of vacuum inside the vacuum interrupter allows the contacts to be much smaller and use less space. As the contacts are encapsulated, vacuum contactors are used fairly extensively in polluted atmospheric applications, such as mining.
Vacuum contactors are therefore very efficient at disrupting the energy of an electric arc and are used when relatively fast switching is required, as the maximum break time is determined by the periodicity of the AC waveform.
Vacuum contactors are compact electrical devices, which can open and close the circuits quite effectively and efficiently. In this type of arrangement the electrical contacts parts are enclosed in a vacuum, so there are no visible arcing parts, as a result of this, it is very user friendly.
Vacuum contactor is such a product which has grown in popularity, even with bigger size and complexity. With these grown popularity, it comes in a demand of more safety and high reliability of equipment with trouble free operations.
Therefore, present invention provides an encapsulated concept and it is in a protective and support insulating body with better electrical and mechanical insulation.

OBJECTS OF THE INVENTION
A basic object of the present invention is to overcome the disadvantages/drawbacks of the known art.
Another object of the present invention is to provide an encapsulated mould assembly for a vacuum contactor.
Another object of the present invention is to provide an encapsulated mould assembly which provides better electrical insulation, free from dust and mechanical support to vacuum contactor.
Another object of the present invention is to provide an encapsulation and protection to a high rupturing capacity (HRC) fuse, vacuum interrupter/arching component and corresponding current carrying part from high voltage.
Another object of the present invention is to provide an encapsulated mould assembly for preventing said assembly from the corona effect which is harmful for insulation body.
These and other advantages of the present invention will become readily apparent from the following detailed description read in conjunction with the accompanying drawings.

SUMMARY OF THE INVENTION
The following presents a simplified summary of the invention in order to provide a basic understanding of some aspects of the invention. This summary is not an extensive overview of the present invention. It is not intended to identify the key/critical elements of the invention or to delineate the scope of the invention. Its sole purpose is to present some concept of the invention in a simplified form as a prelude to a more detailed description of the invention presented later.

In an aspect of the present invention, there is provided an encapsulated mould assembly for a vacuum contactor, said assembly comprising:
a mould housing having an insulating material;
a fuse means encapsulated in said mould housing;
at least two end shield cap (s) connected at the both end (s) of said fuse means for sealing high voltage zone from exterior zone, thereby protecting from the explosion of said fuse means;
a fuse adopter clamp for holding said fuse means in said mould housing, therefore, providing mechanical support to said fuse means;
an vacuum interrupter located in said mould housing for transferring current and carrying current for defined period and interrupting the abnormal current;
an external mechanical arrangement for providing a drive mechanism to said vacuum interrupter;
an arc quenching device i.e. vacuum interrupter inside said mould housing;
at least three current carrying conductor (s) with a incoming terminal and an outgoing terminal for carrying normal & abnormal current & mechanically supporting said mould housing;
wherein said encapsulated mould assembly providing protection by collecting a hazards component obtained from continuous arching which caused by damage of said vacuum interrupter.
Other aspects, advantages, and salient features of the invention will become apparent to those skilled in the art from the following detailed description, which, taken in conjunction with the annexed drawings, discloses exemplary embodiments of the invention.

BRIEF DESCRIPTION OF THE ACCOMPANYING DRAWINGS
The following drawings are illustrative of particular examples for enabling methods of the present invention, are descriptive of some of the methods, and are not intended to limit the scope of the invention. The drawings are not to scale (unless so stated) and are intended for use in conjunction with the explanations in the following detailed description.
Figure.1 illustrates outer looks of vacuum contactor with mould structure.
Figure.2 illustrates basic structure of the present disclosed assembly.
Figure.3 illustrates exterior configuration of the mould/pole assembly of Vacuum contactor assembly
Figure.4 illustrates the interior construction of mould/pole housing.
Figure.5&6 illustrates arrangement of HRC fuse with vacuum interrupter.
Persons skilled in the art will appreciate that elements in the figures are illustrated for simplicity and clarity and may have not been drawn to scale. For example, the dimensions of some of the elements in the figure may be exaggerated relative to other elements to help to improve understanding of various exemplary embodiments of the present disclosure.
Throughout the drawings, it should be noted that like reference numbers are used to depict the same or similar elements, features, and structures.

DETAILED DESCRIPTION OF THE INVENTION
The following description with reference to the accompanying drawings is provided to assist in a comprehensive understanding of exemplary embodiments of the invention as defined by the claims and their equivalents. It includes various specific details to assist in that understanding but these are to be regarded as merely exemplary. Accordingly, those of ordinary skill in the art will recognize that various changes and modifications of the embodiments described herein can be made without departing from the scope and spirit of the invention. In addition, descriptions of well-known functions and constructions are omitted for clarity and conciseness.
The terms and words used in the following description and claims are not limited to the bibliographical meanings, but, are merely used by the inventor to enable a clear and consistent understanding of the invention. Accordingly, it should be apparent to those skilled in the art that the following description of exemplary embodiments of the present invention are provided for illustration purpose only and not for the purpose of limiting the invention as defined by the appended claims and their equivalents.
It is to be understood that the singular forms “a,” “an,” and “the” include plural referents unless the context clearly dictates otherwise.
By the term “substantially” it is meant that the recited characteristic, parameter, or value need not be achieved exactly, but that deviations or variations, including for example, tolerances, measurement error, measurement accuracy limitations and other factors known to those of skill in the art, may occur in amounts that do not preclude the effect the characteristic was intended to provide.
Accordingly, present invention provides an encapsulated mould assembly for a vacuum contactor, therefore providing protection to human life with proper electrical insulation.
In the present invention, a vacuum contactor with fuse is encapsulated in a body of insulation material e.g. epoxy resin. This encapsulated body provided more electrical insulation, free from dust & mechanical support for vacuum interrupter and fuse assembly. Encapsulated pole housing body has molded conductors with incoming and outgoing terminals. Incoming terminal connected with vacuum interrupter via flexible conductor and out top terminal of vacuum interrupter connect with fabricated copper terminals called as fuse adopter or fuse holder, this terminal connect with one termination of HT fuse, other end of the HRC fuse being connected with outgoing terminal.
Fuse holder is round clamp/ mechanical support system, which are capable of holding the HRC fuse and also transfer the current carry. The Fuse holder hold HRC fuse with a provision of replace arrangement, and providing the transfer of current from housing fixed top terminal to fuse.
The major portion of the current carrying path inside the pole housing of the vacuum contactor is made from material which expand and contract when exposed to temperature variation e.g. metallic material copper, nickel or stainless steel.
Fig-1 & fig-2 show the outer looks and basic enclosure for the product.
The figure-3 illustrates the exterior configuration of the pole assembly of Vacuum contactor assembly. As shown in the figure-3 HRC fuses(6) are generally cylindrical structure and normally used for open type configuration, but this invention is meant for the encapsulation of HRC fuse, vacuum interrupter/arcing(10) components and the corresponding current carrying part and protection from High voltage. High Rupturing Capacity (HRC) fuse encapsulated with molded resin cast housing with two end cap have made up of insulation material.
The figure-4 describes the interior construction of pole housing (1) and transfer of current from one point to another point. Current carrying conductor (7, 8&9) has supported in a mould structure and the body insulation material injects into the mould and makes insulation over that, excluding the contact area for current transfer zone. This housing made up of suitable insulation material & having 2 numbers of end shield caps (2 and 3) either or side, which is meant for sealed the high voltage zone from exterior area and protect from the explosion of HRC fuse(6). This suitable voltage insulation material is Epoxy resin. End caps have a provision for separate drive and limit switch mechanism which operate and gives an fuse blown off signal to the contactor control unit.
The insulating housing consists of arrangement of molded bus bar for current transfer from one point to another point in circuit.
Normally the vacuum contactor HRC (6) fuses are explosive type and there is an arrangement for indication of HRC high tension fuse blow-up by an external mechanical arrangement (13&14), it is provides an electrical signal with limit switch to the vacuum contactor and it sends open signal to the tripping coils. The encapsulated housing have two end caps provision for full proof sealing, also there is an additional sealed (12) which act as an end cover & it is made up of insulating material. HRC fuses (6) are clamped with an adopter at both ends with suitable current carrying conductive material to suitable rating. A further advantage of fuse adopter clamp (4&5) is that, they provide a rigid terminal transition on the periphery of the contact termination rod of HRC fuse, thereby preventing temperature rise & power losses.
Apart from of the HRC fuse, the arc quenching device also encapsulated inside the insulating mould body. Top side of arc quenching device is connected with HRC fuse holding clamp through a copper busbar and other side of the arc quenching device connected to a flexible copper conductor (11) and also support with the molded housing. Flexible conductor also connected with incoming/source side of the current system/source. Arcing chamber i.e. vacuum interrupter also locating on the same mould and doing the job of current transfer and interrupting the abnormal current, this will drive with a drive mechanism. Arcing phenomena happens inside the arcing chamber i.e. vacuum interrupter (10). This has been designed such a way that the arc initiated due to abnormal current gets quenched. As a result of this, the failure or damage of the arc quenching device is very minimal & rare. If the arcing phenomena continues for a long period for some different reason then it may not be absorbed, generates high temperature, therefore there can be damage to the vacuum interrupter. This invention will protect the contents coming out from blast such as: breaks ceramic pieces, metal parts and other contents. This hazards component will gathered inside the molded housing. As an advantages of this, contents will gathered inside and save the human life from dangerous arc flash & accident.