Description:

TECHNICAL FIELD
The present disclosure relates to a switching devices for the circuit, electrical panel, switch disconnector, double break arrangement for the switching devices, circuit breakers and the like. More particularly, it relates to a quad break contact system used in switch disconnector. The present invention is a quad break sliding-rotary contact system for switching devices with or without fuse integration thereof.
BACKGROUND
The electrical switching devices consist of sets of contacts that open and close when the device is activated. The electrical switching devices are used to protect the electrical circuit and its components from the circuit break due to overload, fault condition etc. There are one set of contacts for each line, phase or part of the circuit that are designed to switch wherein the ON position the contacts are closed and in OFF position contacts are open. For instance, a simple circuit breaker in a domestic distribution board have a single set of internal contacts similar to the bedside lamp switch. A contactor is an electrical device that is used for switching an electrical circuit ON or OFF.The switch disconnector isolate the power to the equipment by cutting off the electrical flow from the primary input or at the main output. There are various types of electrical switching devices in the market with fixed and moving contacts such as magnetic circuit breaker, thermal breaker, thermal magnetic circuit breaker etc. The moving contacts complete the circuit by coupling with fixed contacts. These type of switching devices are used in various applications where there is a need for a reliable switching device with long electrical life.

Further, double break arrangement in switching devices of the electrical circuit involves two breaks. The electrical switching devices are used to protect the electrical circuit from damage and some time these double break arrangements are limited in their performance based on the size of the rotating moving contact that increases for improving performance leading to a bulky contact system.

Reference is being made to some of the prior arts listed below:
A: US4778961A discloses an enclosure of a compact electric safety switch including a rotatable mounted double contact blade assembly. The cited document is basically a switching device with double break arrangement. Double break arrangement of switch provides good performance and life for a switching device due to breaking current in two different places. Heavy duty compression springs are positioned under the blade assembly for rapid make and break connection between opposing line and load contact stabs. A pair of contact springs directs the contact blade during transit between the line and load contact stabs and serves to increase the contact pressure between the contact blade and the contact stabs when the contact blade is inserted therein.

B: US10896789B2 discloses an electrical switch comprises at least one fixed contact, a movable contact contacting the fixed contact, and at least one extinguishing apparatus positioned after the fixed contact in an opening direction of the movable contact. A permanent magnet is further positioned after the extinguishing apparatus in the opening direction of the movable contact. The invention relates to an improved electrical switch.

C: US4910485A discloses a breaking device for a low voltage circuit breaker comprises in each pole a switching bar, a pair of stationary contacts connected to the connection terminals, a double-break rotary contact extending in a housing of the bar, and two arc chutes disposed on each side of the bar. Two contact pressure springs ensure elastic positioning of the rotary contact along the longitudinal direction of the pole. Pivoting of the rotary contact takes place around a fictitious axis mounted floating with respect to the fixed rotation axis of the bar.

D: US8350168B2 discloses an arrangement for a fast-acting Quad break switch with bumper/butt contacts. This contact arrangement is usually only suitable for lower current rating switching devices. The cited document D is an interrupter includes at least four pairs of contacts. Each pair of contacts includes a stationary contact positioned to about a corresponding moveable contact. The moveable contacts are coupled to a rotating member. The rotating member is coupled to a driving member via a biasing member. The driving member is rotated causing all four pairs of contacts to separate and open a circuit quickly.

The existing-state-of-the-art involves bulky system with lower current rated switches without proposing the integration of fuse for short circuit protection. The solution D is not suitable to withstand Short-circuit currents which is a requirement for co-ordination in higher rated switches nor does it provide any option of fuse integration. Moreover, the solutions disclosed in above prior art publications A, B and C describe a switching device with double break arrangement. Double break arrangement of switch provides good performance and life for a switching device due to breaking current in two different place, but double break arrangement is limited in its performance because to improve performance the size of rotating moving contact needs to be increased, resulting in a bulky contact system. Increasing moving contact size is also disadvantageous due to a sharp increase in moment of inertia and resultant requirement of higher operating torque and a larger mechanism resulting in a product which is bulky and cumbersome to operate.

Therefore, in the light of the above facts, there is a need for an efficient quad break switching devices from the protection of the short circuit and other fault damages. The present invention provides a Quad break switch with Knife/Blade contacts which is suitable for any current rating. Since breaking of current happens at 4 different locations, it provides better reliability and electrical life in compact size compared to a double break device. It also provides features to withstand high current which is required for co-ordination and provides arrangement for integration of fuse to add short-circuit protection.

SUMMARY OF THE INVENTION
The following disclosure 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.

An object of the present invention is to address and remove all the above limitations.

Another object of the present invention is to provide a quad break switching devices with knife/blade contacts suitable for withstanding high currents.

Yet another object of the present invention is to provide a compact size system with or without fuse integration to protect the short circuit breakdown using lower number of components.

Yet still another object of the present invention is to provide a design for quad break rotary switching device suitable for all current ratings, having ability to withstand abnormal/high currents and provide arrangement for fuse Integration.

Yet another object of the present invention is to provide improved performance of the device during making and breaking operations and result in a more reliable and longer life of switching device.

Yet another object of the present invention is to provide a quad break sliding-rotary contact system switching devices with magnetic cladding ensuring better short time withstand performance during abnormal conditions such as short circuit.

First aspect of the present invention is to provide a quad break sliding-rotary contact system for a switching devices, the system comprises at least one rotor assembly assembled with one or more components placed at the center of switching device, at least one contact pole assembly connected with a fuse of the switching device and a device assembly stacked with the pole assembly along with a mechanism together in the switching device wherein the system operates in ON-OFF, OFF-ON switch position to provide features withstanding high current with the integrated arrangement of fuse for short-circuit protection of the switching devices.

Second aspects of the present invention is to provide a rotor assembly of a quad break sliding-rotary contact system for switching devices, the assembly comprises at least one leaf springs inserted into a slots available in a top rotor unit wherein one or more leaf pins dropped in to fix the leaf onto the slots at least one top rotor unit having oblong and circular holes present wherein the mechanism drives adjacent to the contact system pole through oblong holes, at least two moving contacts inserted along with claddings into the top rotor unit wherein the moving contacts comprises first moving contacts and second moving contacts and at least one bottom rotor unit placed on the cladding of at least two moving contacts namely third and fourth twisted slightly to lock with the top rotor unit wherein the bottom rotor unit consists of at least one pin to transfer force.

Third aspects of the present invention is to provide a contact pole assembly of a quad break sliding-rotary contact system for switching devices, the assembly comprises at least three fixed contacts dropped into a housing on the switching device wherein a de-ion plates, nut dropped in a slots provided into the housing, at least one fixed contact assembled with a cover inserted into moving contacts gaps of the rotor assembly of the system and a shorting link replaced in the pole assembly with one or more fuse holders using a fuse springs wherein the shorting link placed on the top surface of the housing and cover using one or more screws to tightened the nuts for fixing said link with the third and fourth fixed contacts performed in rotor assembly.

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 above and other aspects, features and advantages of the embodiments of the present disclosure will be more apparent in the following description taken in conjunction with the accompanying drawings, in which:

Figure 1 illustrates a general view of a 3 Pole Front operated Switch which comprises of Contact system poles (A), Mechanism (B) and Handle (C) and the Switch shows OFF position in accordance with the present invention.

Figure 2 illustrates a general view of a 3 Pole Front operated Switch along with fuse which comprises of Contact system poles (A), Fuse (B), Mechanism (C) and Handle (D) and the Switch shows OFF Position in accordance with the present invention.

Figure 3 illustrates a general view of 1 modular pole of contact which is referred to as a switching device. It consists First fixed contact (1), Second Fixed contact (2), Housing (3), Cover (4), Shorting Link (5), M6 Screw (6), Top Rotor (10) in accordance with the present invention.

Figure 4 illustrates a general view of switching device without Cover (4). It comprises of Third Fixed contact (11), Fourth Fixed contact (12), M6 Nut (13), De-ion plate (14) – 12 Numbers, Leaf spring holding pins (15), Leaf spring (16) in accordance with the present invention.

Figure 5 illustrates a cross-section view of switching device comprising of First moving contact (19), Second Moving contact (20), Magnetic cladding (23) – 4 Numbers, Bottom Rotor (24) in accordance with the present invention.

Figure 6 illustrate a cross-section view of switching device in ON position in accordance with the present invention.

Figure 7 illustrates an exploded view of Switching device showing the drop in type of assembly in accordance with the present invention.

Figure 8 illustrates an exploded view of Rotor assembly (25) in accordance with the present invention.

Figure 9 illustrates a general view of Rotor assembly (25) and highlights the gaps in Moving contact in accordance with the present invention.

Persons skilled in the art will appreciate that elements in the figures are illustrated for simplicity and clarity and may not have 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
The following description with reference to the accompanying drawings is provided to assist in a comprehensive understanding of various embodiments of the present disclosure 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 various embodiments described herein can be made without departing from the scope and spirit of the present disclosure. In addition, descriptions of well-known functions and constructions may be 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 present disclosure. Accordingly, it should be apparent to those skilled in the art that the following description of various embodiments of the present disclosure is provided for illustration purpose only and not for the purpose of limiting the present disclosure 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. Thus, for example, a reference to “a component surface” includes a reference to one or more of such surfaces.

All terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which various embodiments belong. Further, the meaning of terms or words used in the specification and the claims should not be limited to the literal or commonly employed sense but should be construed in accordance with the spirit of the disclosure to most properly describe the present disclosure.

The terminology used herein is for the purpose of describing particular various embodiments only and is not intended to be limiting of various embodiments. As used herein it is understood that the terms “comprises” and/or “comprising” used herein specify the presence of stated features, integers, steps, operations, members, components, and/or groups thereof, but do not preclude the presence or addition of one or more other features, integers, steps, operations, members, components, and/or groups thereof. Also, expressions such as “at least one of,” when preceding a list of elements, modify the entire list of elements and do not modify the individual elements of the list.

The present invention will now be described more fully with reference to the accompanying drawings, in which various embodiments of the present disclosure are shown. The present disclosure may, however, be embodied in many different forms and should not be construed as being limited to the various embodiments set forth herein, rather, these various embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the present disclosure. Furthermore, a detailed description of other parts will not be provided not to make the present disclosure unclear. Like reference numerals in the drawings refer to like elements throughout.

Embodiments discloses a quad break sliding-rotary contact system for switching devices suitable for all current ratings and having ability to withstand abnormal/high currents and provide arrangement for fuse integration. The present invention provides a switching device with at least four points of breaking. The increase in number of breaks improves the performance of the device during making and breaking operations due to an increase in arc voltage which is advantageous as a higher arc voltage result in faster arc quenching and subsequently result in a more reliable and longer life of switching device. Further, the present invention embodiments provide a Quad break switch with Knife/Blade contacts which is suitable for any current rating. It has a blade type of contacts with magnetic cladding ensuring better short time withstand performance during abnormal conditions such as short circuit. Also, it provides a better reliability and electrical life in compact size compared to a double break device.

The present invention discloses a quad break sliding-rotary contact system for switching devices with fuse integration or without fuse in a short circuit breaker system. It discloses an efficient and improvised design system for the switch disconnector to provide better electrical life and compact size to the switching devices for commercial distribution and building electrical segments to make, carry and break currents under normal circuit conditions and specified overload conditions. The one of the objective of the present invention is to design and achieve a quad break sliding-rotary switching device suitable for all current ratings having ability to withstand abnormal or high currents with the arrangement of fuse integration into the system.

The present invention discloses operating principle in a non-limiting operating condition.

1. During OFF - ON or ON - OFF operation, the Mechanism (B) drives its adjacent contact system pole through Oblong Holes (18) present in Top rotor (10). This Contact system pole in turn drives the next pole through Circular holes/Projections (17) present in Top rotor (10). Bottom rotor (24) consists of appropriate Projections/pins to transfer the force.

In ON position: The first moving contact (19), Second moving contact (20), Third moving contact (21) and fourth moving contact (22) are held between Top Rotor (10) and Bottom rotor (24) such that their movement with respect to Top and Bottom rotor (10,24) is restricted in XY Plane. Moving contacts are held in Z plane by leaf springs (16) ensuring relative motion while generating contact pressure when switched ON.

In OFF position, first moving contact (19) and second moving contact (20) have a gap (25,26) between them at both ends. This gap (25) is less than Fixed Contacts (1,2) thickness. Similar arrangement is provided for Third and Fourth moving contact (21,22) and Fixed Contacts (11,12).

2. During OFF - ON the rotor assembly (25) along with all four moving contacts rotate in clockwise direction for an Angle A1. During this operation, fixed contacts (1,2,11,12) are inserted into the Moving Contact Gaps (25,26,27,28). During insertion the moving contact (19) moves in Z direction whereas the moving contact (20) moves in -Z direction, proper chamfers are provided for easy movement, this movement compresses the leaf springs (16) generating required contact pressure.

3. During ON - OFF operation, the Rotor assembly (25) moves in Anti-clockwise direction. The current flowing through the Circuit breaker is broken at 4 places (25,26,27,28). This results in a higher Arc Voltage. De-ion plates (14) are placed at all these four break points to further increase Arc Voltage. Chamber separation between all four chambers is provided and Venting is provided at appropriate places to ensure Arc entering Arc Chutes (14A,14B,14C,14D). Higher Arc voltage leads to faster extinguishing of ARC. This increases the life of the switch since erosion is reduced. This also reduces the erosion of Contacts and spreads any erosion particles in various chambers in Housing (3) ensuring better reliability of product.

4. During short time withstand (Switch in ON position, Short circuit Current Flowing through switch), first moving contact (19) and second moving contact (20) are attracted towards each other due to Lorentz force. Addition of magnetic cladding (23) generates a force of magnetic attraction between cladding of First moving contact (19) and cladding of Second moving contact (20). This force of Attraction is in turn transferred to moving contacts further increasing the attraction force. These attraction forces enable the moving contacts to maintain a positive contact with the fixed contacts. In the absence of these forces of attraction, moving contacts would repel open due to Holms(repulsion) force at area of contact. Thus, these additional attraction forces aid in achieving a Higher Short time withstand current and duration by ensuring that the attraction force on Moving contact towards fixed contact is always higher than the repulsion force. The compact quad break arrangement with sliding and rotary moving contacts helps to achieve compact size by maintaining a general V-shape profile of moving contacts.

In a non-limiting embodiment, the present invention provides a quad break sliding-rotary contact system for a switching devices, the system comprising at least one rotor assembly (25) assembled with one or more components placed at the center of switching device, at least one contact pole assembly (A) connected with a fuse of the switching device and a device assembly stacked with the contact pole assembly along with a mechanism (B) together in the switching device wherein the system operates in ON-OFF, OFF-ON switch position to provide features withstanding high current with the integrated arrangement of fuse for short-circuit protection of the switching devices.

In another non-limiting embodiment, the present invention provides the rotor assembly (25) as claimed in claim 1, the said assembly (25) comprises at least one leaf springs inserted into a slots (30) available in a top rotor unit (10) wherein one or more leaf pins (15) dropped in to fix the leaf onto the slots (30), at least one top rotor unit (10) having oblong and circular holes present wherein the mechanism (B) drives adjacent to the contact system pole through oblong holes, at least two moving contacts inserted along with claddings into the top rotor unit (10) wherein the moving contacts comprises first moving contacts (19) and second moving contacts (20) and at least one bottom rotor unit (24) placed on the cladding of at least two moving contacts namely third and fourth (20,22) twisted slightly to lock with the top rotor unit (10) wherein the bottom rotor unit (24) consists of at least one pin or projection (17) to transfer force between the rotor assembly (25) of the one contact system pole (A) to the next adjacent contact system pole after receiving the force from the mechanism (B) or an adjacent contact system pole (A).

In a non-limiting embodiment, the present invention provides the rotor assembly (25) along with the all four moving contacts rotate in clockwise direction for a predefined angle A1 at 50 degrees in OFF-ON position of the switching devices. The angle of the moving contacts is predefined at angle A1 and may not limited thereto..

In a non-limiting embodiment, the present invention provides the rotor assembly (25) along with the all four moving contacts rotate in anti-clockwise direction in ON-OFF position of the switching devices.

In a non-limiting embodiment, the present invention provides the rotor assembly involving the first moving contact (19) moves in Z direction and the second moving contact (20) moves in –Z direction during insertion of at least four fixed contacts (1,2,11,12).

In a non-limiting embodiment, the present invention provides the rotor assembly designed in a way that assembling male and female pieces together along with all other components (Moving Contacts, Claddings) in between makes a rotor assembly as a simple drop design ensuring faster assembly time. This ensures quick assembly due to simple drop in design ensuring faster assembly time. Locking of cantilever/leaf spring inside rotor with pins is designed for easy assembly. This complete rotor assembly is quick and easy, leading to a reduction in assembly time. Therefore, leading to a reduction in the production cycle.

In yet another non-limiting embodiment, the present invention provides the contact pole assembly (A) comprising at least three fixed contacts (1,2 11) dropped into a housing (3) on the switching device wherein a de-ion plates (14), nut (13) dropped in a slots provided into the housing (3), at least one fixed contact (12) assembled with a cover (4) inserted into moving contacts gaps (25,26,27,28) of the rotor assembly of the system and a shorting link (5) replaced in the pole assembly (A) with one or more fuse holders using a fuse springs wherein the shorting link (5) placed on the top surface of the housing (3) and cover (4) using one or more screws (6) to tightened the nuts for fixing said link (5) with the third and fourth fixed contacts (11,12) performed in rotor assembly (25).

In a non-limiting embodiment, the present invention provides the device assembly tightened to hold the poles along with the mechanism (B) by inserting at least one long screws into a slots (9) of the switching device wherein the mechanism (B) in turn transfer the user applied force to rotor assembly (25) using pin/projections (17) in ON-OFF and/or OFF-ON position of the switching devices. The mechanism (B) may be operated by user to toggle the switch position from ON-OFF and vice versa condition.

In a non-limiting embodiment, the present invention provides the quad break sliding-rotary contact system comprising plurality of breaks increases Holms force (Repulsion force) leading to faster Arc quenching resulting into higher electrical life for the switching devices. With quad break sliding-rotary contact system, quench arc faster is achieved by way of increasing number of breaks leads to faster Arc quenching due to increase in arc voltage. This is advantageous as a faster arc quenching may result in higher electrical life making the switch reliable and long lasting.

In a non-limiting embodiment, the present invention provides the moving contacts and fixed contacts having V-shaped profile to achieve higher blow-out force on ARC enabling to generate higher ARC voltage for improving electrical life of the switching devices with having compact size.

In a non-limiting embodiment, the present invention provides the V-shaped of the moving contacts, fixed contacts, magnetic cladding ensuring higher attraction force enabling to claim higher short withstand current for a longer duration of V-profile magnetic cladding.

In a non-limiting embodiment, the present invention provides the strategical presence of the projections in moving contact able to achieve higher Lorentz force of attraction between two moving contacts without increasing the size of the moving contacts resulting into better short time withstand performance. Having two V-shape moving contacts in parallel ensuring higher attraction forces between the contacts and the magnetic cladding. As the number of breaks increases, Holms force (Repulsion force) increases but by creating a parallel path to increase Lorentz force it ensure higher attraction force enabling to claim higher short time withstand current for a longer duration.

In a non-limiting embodiment, the present invention provides the design of the quad break arrangement with sliding-rotary moving contacts suitable for the fuse integrated into the system or without the fuse undergoing no change in the system molded, press and/or parts based on a user’s choice. The design of a quad break arrangement with sliding-rotary moving contacts which is both suitable for use with or without a fuse without any change in molded or press parts. There is a need for at least one additional component required to convert the product from switching device with fuse to switching device without fuse. The same can be changed at customer’s/user end with a single tool.

In a non-limiting embodiment, the present invention provides wiping nature of a plurality of blade contacts of the system helps to achieve better contact surface area to clean the erosion deposits during ON-OFF operation of the switching devices.

In a non-limiting embodiment, the present invention provides wherein more than 80% isolation distance achieved resulting into improvised di-electric properties of the switching device. In quad break sliding-rotary contact system, 80% more isolation distance is achieved than the equivalent double break rotary system. Higher isolation distance result in an improvement in di-electric properties of switching device. In an exemplary embodiment, when there is a double break system with similar dimensions, the present invention involving quad break sliding-rotary system will provide 80% higher isolation distance than the existing system.

Referring to the brief description of the drawings stated above all Figures. The Figure 1 illustrates a general view of a 3 Pole Front operated Switch which comprises of Contact system poles (A), Mechanism (B) and Handle (C) and the Switch shows OFF position in accordance with the present invention. The Figure 1 discloses a switching device along with mechanism (B). In a non-limiting embodiment, Figure 1 involves the contact pole assembly (A), Mechanism (B) and Handle (C) assembled on the quad break sliding-rotary system.

Figure 2 illustrates a general view of a 3 Pole Front operated Switch along with fuse which comprises of Contact system poles (A), Fuse (D), Mechanism (B) and Handle (C) and the Switch shows OFF Position in accordance with the present invention. The Figure 2 discloses a switching device with Fuse (D) along with mechanism (B). The design of a quad break arrangement with sliding-rotary moving contacts which is both suitable for use with or without a fuse without any change in molded or press parts. Only one additional component is required to convert the product from switching device with fuse (D) to switching device without fuse (D). The same can be changed at customer’s /user’s end with a single tool.

Figure 3 illustrates a general view of 1 modular pole of contact which is referred to as a switching device. It consists First fixed contact (1), Second Fixed contact (2), Housing (3), Cover (4), Shorting Link (5), M6 Screw (6), Top Rotor (10) in accordance with the present invention. The Figure 3 discloses one modular pole of switch. The general V-shape profile of Moving contact and V-shape profile of Fixed Contacts, it achieves a net higher blow-out force on ARC enabling us to generate higher Arc voltage quickly. This improves Electrical life of Switching device. Having Two V-shape moving contacts in parallel ensuring higher attraction forces between them. As the number of breaks increases, Holms force (Repulsion force) increases but by creating a parallel path to increase Lorentz force ensure higher Attraction force enabling to claim Higher Short time withstand current for a longer duration.

Figure 4 illustrates a general view of switching device without Cover (4). It comprises of Third Fixed contact (11), Fourth Fixed contact (12), M6 Nut (13), De-ion plate (14) – 12 Numbers, Leaf spring holding pins (15), Leaf spring (16) in accordance with the present invention. The Figure 4 discloses a pole/Switching device internal view. Locking of cantilever/leaf spring inside rotor with pins designed for easy assembly. This complete rotor assembly (25) quickly and in easy manner, leading to a reduction in assembly time. Therefore, there is a decrease in production cycle. The compact size is achieved for quad break sliding-rotary system by maintaining a general V-shape profile of Moving Contacts.

Figure 5 illustrates a cross-section view of switching device comprising of First moving contact (19), Second Moving contact (20), Magnetic cladding (23) – 4 Numbers, Bottom Rotor (24) in accordance with the present invention. The Figure 5 discloses a system switching device in OFF position. V-shape profile of Magnetic Cladding is provided such that the magnetic cladding increases magnetic attraction force, ensuring higher Attraction force enabling to claim Higher Short time withstand current for a longer duration.

Figure 6 illustrate a cross-section view of switching device in ON position in accordance with the present invention. The Figure 6 discloses a system switching device in ON position. In ON position of the switching device, additional attraction forces aid in achieving a Higher Short time withstand current and duration by ensuring that the Attraction force on Moving contact towards fixed contact is always higher than the repulsion force.

Figure 7 illustrates an exploded view of switching device showing the drop in type of assembly in accordance with the present invention. The Figure 7 discloses a switching device exploded view. The exploded view of the quad break sliding-rotary system discloses the embodiments in separation and clarifies their position in connection to each other as an assembly.

Figure 8 illustrates an exploded view of rotor assembly (25) in accordance with the present invention. The rotor assembly (25) along with the all four moving contacts rotate in anti-clockwise direction in ON-OFF position of the switching devices. Rotor assembly (25) exploded view disclosing its embodiments with arrangement such as top rotor (!0), moving contact (20), bottom rotor (24) etc. as shown in the Figure 8.

Figure 9 illustrates a general view of Rotor assembly (25) and highlights the gaps in moving contact in accordance with the present invention. During OFF - ON the rotor assembly (25) along with all four moving contacts rotate in clockwise direction for an Angle A1 at 50 degrees. During this operation, fixed contacts (1,2,11,12) are inserted into the moving contact Gaps (25,26,27,28). The embodiments of the rotor assembly (25) are assembled in such a way that all components/embodiments are dropped in and no special tools are required. Leaf/Cantilever springs are inserted into the Slots (30) available in the Top rotor (10) and Leaf spring pins (15) are dropped in to fix them. Moving Contacts (19,20) along with claddings are inserted into the Top Rotor (10). Bottom rotor (24) is then placed on Claddings of Moving Contacts (20,22) and slightly twisted to lock with the Top Rotor (10).

As used herein, circuit breaker primary function is to disrupt the electrical flow to the connected electrical device upon detecting a dangerously higher voltage, thus protecting it from any lasting electrical damage.

As used herein, an Arc quenching relates to the stoppage of the arc and/or metal transfer. If there is a break of high voltages care must be advised to minimize the amount of current flowing at the time of contact opening to minimize the metal transfer. Minimizing the current will prolong the life of the contacts. At low current as the current increases, the arc voltage decreases.

As used herein, Holms force relates to a repulsive force between surfaces in contact with each other. As the current increases the repulsive force gets bigger and bigger.

As used herein, Lorentz force relates to the combination of the magnetic and electric force on a point charge due to electromagnetic fields. It is used in electromagnetism and is also known as electromagnetic force.

As used herein, magnetic cladding provides reduction of magnetic flux leakage and provide an enhanced magnetic field in a controlled manner.

Henceforth, the present invention proposes a novel and inventive system for quad break sliding-rotary contact system for switching devices with or without integration of fuse. The unique design of a quad break arrangement with sliding-rotary moving contacts which is both suitable for use with or without a fuse without any change in molded or press parts. There is a requirement of at least one additional component to convert the product from switching device with fuse to switching device without fuse in the present invention. The present invention achieves the objective of providing a quad break contact system with sliding rotary suitable for all currents rating with an ability to withstand the abnormal or high current into the electrical circuits.

The present invention offers multiple technical advantages out of which few have been enumerated below for ease of understanding:
• The present invention provides better reliability and electrical life in compact size compared to a double break device. It also provides features to withstand high current which is required for co-ordination and provides arrangement for integration of fuse to add short-circuit protection.
• The present invention provides a Quad break switch with Knife/Blade contacts which is suitable for any current rating. Since breaking of current happens at four different locations.
• The present invention provides a quad break switching device with fuse using lower number of components with a compact size of the switching devices with the integration of the fuse.
• The present invention provides a reduction in the erosion of contacts and spreads any erosion particles present in various chambers ensuring better reliability of product.
• The present invention provides a quick assembly due to simple drop in design and ensure faster assembly time. This leads to a decrease in production cycle.

The foregoing description of the present invention has been presented for purposes of illustration and description. It is not intended to be exhaustive or to limit the invention to the precise form or forms disclosed, and other modifications and variations may be possible in light of the above teachings wherein those of skill in the art will recognize certain modifications, permutations, additions and sub combinations thereof.
, Claims:
1. A quad break sliding-rotary contact system for a switching devices, the system comprising:
- at least one rotor assembly (25) assembled with one or more components and placed at the center of switching device;
- at least one contact pole assembly (A) connected with a fuse of the switching device; and
- a device assembly stacked with the pole assembly along with a mechanism (B) together in the switching device,
wherein the system operates in ON-OFF, OFF-ON switch position to provide features withstanding high current with the integrated arrangement of fuse for short-circuit protection of the switching devices.

2. The rotor assembly (25) as claimed in claim 1, the said assembly (25) comprising:
- at least one leaf springs inserted into a slots (30) available in a top rotor unit (10), wherein one or more leaf pins (15) dropped in to fix the leaf onto the slots (30);
- at least one top rotor unit (10) having oblong and circular holes present, wherein the mechanism (B) drives adjacent to the contact system pole through oblong holes;
- at least two moving contacts inserted along with claddings into the top rotor unit (10), wherein the moving contacts comprises first moving contacts (19) and second moving contacts (20); and
- at least one bottom rotor unit (24) placed on the cladding of at least two moving contacts namely third and fourth (20,22) twisted slightly to lock with the top rotor unit (10) , wherein the bottom rotor unit (24) consists of at least one pin or projection (17) to transfer force between the rotor assembly (25) of the one contact system pole (A) to the next adjacent contact system pole after receiving the force from the mechanism (B) or an adjacent contact system pole (A).

3. The rotor assembly (25) as claimed in claim 2, wherein the rotor assembly (25) along with the all four moving contacts rotate in clockwise direction for a predefined angle A1 at 50 degrees in OFF-ON position of the switching devices.

4. The rotor assembly (25) as claimed in claim 2, wherein the rotor assembly (25) along with the all four moving contacts rotate in anti-clockwise direction in ON-OFF position of the switching devices.

5. The rotor assembly (25) as claimed in claim 2, wherein the first moving contact (19) moves in Z direction and the second moving contact (20) moves in –Z direction during insertion of at least four fixed contacts (1,2,11,12).

6. The rotor assembly (25) as claimed in claim 2, wherein said assembly designed in such a way that assembling male and female pieces together along with all other components (Moving Contacts, Claddings) in between makes a rotor assembly as a simple drop design ensuring faster assembly time.

7. The contact pole assembly (A) as claimed in claim 1, the said assembly(A) comprising:
- at least three fixed contacts (1,2 11) dropped into a housing (3) on the switching device, wherein a de-ion plates (14), nut (13) dropped in a slots provided into the housing (3);
- at least one fixed contact (12) assembled with a cover (4) inserted into moving contacts gaps (25,26,27,28) of the rotor assembly of the system; and
- a shorting link (5) replaced in the pole assembly (A) with one or more fuse holders using a fuse springs,
wherein the shorting link (5) placed on the top surface of the housing (3) and cover (4) using one or more screws (6) to tightened the nuts for fixing said link (5) with the third and fourth fixed contacts (11,12) performed in rotor assembly (25).

8. The system as claimed in claim 1, the device assembly tightened to hold the poles along with the mechanism (B) by inserting at least one long screws into a slots (9) of the switching device wherein the mechanism (B) in turn transfer the user applied force to rotor assembly (25) using pin/projections (17) in ON-OFF and/or OFF-ON position of the switching devices.

9. The system as claimed in claim 1, wherein the quad break sliding-rotary contact system comprising plurality of breaks increases Holms force (Repulsion force) leading to faster Arc quenching resulting into higher electrical life for the switching devices.

10. The system as claimed in claim 1, wherein the moving contacts and fixed contacts having V-shaped profile to achieve higher blow-out force on ARC enabling to generate higher ARC voltage for improving electrical life of the switching devices with having compact size.

11. The system as claimed in claim 10, wherein the V-shaped of the moving contacts, fixed contacts, magnetic cladding ensuring higher attraction force enabling to claim higher short withstand current for a longer duration of V-profile magnetic cladding.

12. The system as claimed in claim 11, wherein the strategical presence of the pin/projections in moving contact able to achieve higher Lorentz force of attraction between two moving contacts without increasing the size of the moving contacts resulting into better short time withstand performance.

13. The system as claimed in claim 1, wherein the design of the quad break arrangement with sliding-rotary moving contacts suitable for the fuse integrated into the system and/or without the fuse undergoing no change in the system molded, press and/or parts based on a user’s choice.

14. The system as claimed in claim 1, wherein wiping nature of a plurality of blade contacts of the system helps to achieve better contact surface area to clean the erosion deposits during ON-OFF operation of the switching devices.

15. The system as claimed in claim 1, wherein more than 80% isolation distance achieved resulting into improvised di-electric properties of the switching device.