FORM2
THE PATENTS ACT, 1970
(39 of 1970)
&
The Patents Rules, 2003
COMPLETE SPECIFICATION
(See section 10; rule 13)
1. Title of the invention: IMPROVED SWITCH GEAR ASSEMBLY PROVIDING
FOR REDUCTION IN AC LOSSES
2. Applicant(s):
(a) NAME : LARSEN & TOUBRO LIMITED
(b) NATIONALITY : An Indian Company
(c) ADDRESS : L & T House, Ballard Estate, Mumbai 400 001, State
of Maharashtra,"India
o3. PREAMBLE TO THE DESCRIPTION
The following specification particularly describes the invention and the manner in which it is to be performed:

TECHNICAL FIELD OF THE INVENTION
This invention relates generally to a switch gear assembly. More particularly the present invention relates to an improved switch gear assembly providing for reduction in AC losses in conductor path of a switch gear for use in electric transmission and distribution networks.
BACKGROUND AND THE PRIOR ART
»
The present invention relates to electric switchgears which are used in electric transmission
and distribution networks. Switchgears are used for protection of electric network/circuit and-equipments. A switchgear consist of a outer enclosure in which switching (make/break) takes place, a current path which is connected to the main supply line and make/break electric supply, a mechanism which may be a combination of a number of mechanical links or may be any arrangement which stores energy and releases in mechanical form when required. The current path/conductor of switchgears is made of highly electric conductive materials to reduce the I2R losses. In current path mainly two types of losses takes place which are I2R losses (DC losses) and eddy current or AC losses (skin and proximity effect losses).
Currently ferromagnetic material plates or conducting material pates are used to provide magnetic shielding between adjacent conductors to reduce eddy current losses. This arrangement requires a large space between adjacent conductors to place ferromagnetic plate/ shield. The effectiveness of shielding is depends on the distance between conductor and shield. The medium between conductor and shield also affect the effectiveness.
AC losses can also be reduced by the use of hollow conductors and litz wires. These technologies mainly reduce the skin effect losses in conductors. Due to skin effect there is lesser current density at centre of conductor. The hollow conductors have the cross section where the current density is higher thus improves the effective use of conductor cross section. Hollow conductors may not be suitable for all kind of application. For higher current applications the size of hollow conductors will be very Jarge. Litz wires are the special arrangement of a number of conducting wires which designed for effective utilization of

cross section of individual wires. Since the effective resistance of whole conductor in litz wire due to internal insulations is higher than a solid conductor the use of litz wires is not preferred in low resistance applications.
Some patents which are closer to present field of invention, are as follows:
US 2010/0268207/A1 provides for the use of ferromagnetic plated wire in surgical equipment. This is used for separating tissue, tissue destruction etc.
US 715597 provide an improved fornTof fnagnetic"wire for use~in magnetic "storage devices. The improvement in wire properties is done by plating of magnetic\ferromagnetic material.
Nqne_of the prior arts provide for use of ferromagnetic plating in switchgears. The present invention provides a means to reduce the eddy current (AC losses) losses in the conductor path by the use of plating/coating of a ferromagnetic material on conductor. The present invention provides an efficient and easier means to reduce the AC losses in current path of switchgears. No extra space required and also there is less effect of surrounding medium on shielding properties.
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 a means to reduce the eddy current (AC losses) losses in the conductor path by the use of plating/coating of a ferromagnetic material on conductor.
Yet another object of the present invention is to prevent the use of extra space for shielding.

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
There is provided an improved switch gear assembly for reduction in AC losses in conductor path of a switch gear.
According to one embodiment of the present invention, there is provided improved switch gear assembly providing for reduction in AC losses in conductor path of a switch gear for use in electric transmission and distribution networks, wherein said assembly comprising a plurality of ferromagnetic material plated conductors; atleast a current path assembly comprising said conductors; atleast a flexible conductor (4) having one end welded to a conductor (3) at joint (9) and other end welded to a conductor (5) at joint (10); atleast a housing for assembling conductors; atleast a button (6) brazed with said conductor (5); atleast a strip (8) brazed on a conductor (2); and atleast a profile (7) provided for arc elongation.
BRIEF DESCRIPTION OF THE ACCOMPANYING DRAWINGS
Figure 1 illustrates an Outer enclosure/housing and current/conductor path assembly-Figure 2 illustrates a Current/conductor path assembly and its various components, joints and working.
Figure 3 illustrates another view of assembly.
Figure 4 illustrates a single terminal conductor of current/conductor path assembly with ferromagnetic plating.

DETAILED 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.
Reference is first invited to Fig 1 where the outer enclosure/housing and current/conductor path assembly is shown. It shows three adjacent conductor/current paths assembly.
Fig 2 shoVs the current path assembly of switchgear comprising of main terminals 2 and 3 which are made of a conductive material like copper, alurninum etc. Conductors 2 and 3 arc fixed on housing by some fixing mean.
Fig 3 shows a high conductive material button 6 is brazed with conductor 5 similarly a strip 8 of high conductive material is also brazed on conductor 2.
Fig 4 shows conductors 2 and 3.
The invented system is thus an improved switch gear assembly providing for reduction in AC losses in conductor path of a switch gear.
DETAILED DESCRIPTION OF THE INVENTION
Accordingly the present invention provides for the reduction of AC losses i.e. proximity effect and skin effect losses in conductor path of switchgear. This is achieved by use of ferromagnetic material coating on conductors. The used material for coating/plating may be alloys of Nickel and Iron (Ni-Fe) or any other high permeability material. The general construction of 3 phase switchgear is shown in Fig 1.

The complete current path is assembled in outer enclosure /housing 1 (for only one pole is shown in Fig 1). The current path assembly (Fig 2) of switchgear comprises of main terminals 2 and 3 which are made of a conductive material like copper, aluminum etc. conductors 2 and 3 are fixed on housing by some fixing mean. The one end of a flexible conductor 4 is pressure welded with conductor 3 at joint 9, the other end of flexible conductor is pressure welded with another conductive part 5 at joint 10. Any other means of joining may also be used instead of pressure welding. The flexible conductor 4 provides a free movement of conductor 5. A high conductive material burton 6 is brazed with conductor 5 similarly a strip 8 of high conductive material is also brazed on conductor 2. High conductive materials are used to reduce contact resistance at joint 11 when breaker closes. Profile 7 is provided for arc elongation when circuit breaks.
In existing