Claims:
1. A circuit breaker comprising:
a plug contact (1); and
a cradle having one or more jaw contacts, each of the one or more jaw contacts comprising a plurality of contact fingers configured in the form of a pair of contact fingers (2), wherein said pair of contact fingers (2) comprises an entry chamfer (2a) and one or more profiles (2b) adapted to allow the plug contact (1) to engage and disengage with said pair of contact fingers (2) to establish an electrical connection, and wherein said pair of contact fingers (2) are separated using a spacer pin (8).

2. The circuit breaker as claimed in claim 1, wherein the spacer pin (8) is encapsulated inside a contact spring (10).

3. The circuit breaker as claimed in claim 1, wherein the spacer pin (8) comprises a first end and a second end, wherein said first end and said second end are adapted to rest on a leaf pair aligner guide (15) provided on the pair of contact fingers (2).

4. The circuit breaker as claimed in claim 3, wherein a leaf pair aligner plate (11) is assembled in between said contact leaf pair aligner guide (15) and said spacer pin (8).

5. The circuit breaker as claimed in claim 1, wherein said pair of contact fingers (2) is held together by a spring holder (9).

6. The circuit breaker as claimed in claim 5, wherein said spring holder (9) is mounted on a spring holder cavity (16) provided on each of contact finger from said pair of contact fingers (2) to held together said pair of contact fingers (2) forming a contact leaf pair assembly.

7. The circuit breaker as claimed in claim 6, wherein said contact leaf pair assembly is locked in a slot (14) provided on a jaw contact assembly holder (13).

8. The circuit breaker as claimed in claim 7, wherein jaw contact assembly holder (13) comprises a leaf pair aligner (19) to maintain a space between two individual contacts leafs as well as avoid tilting on one side of a leaf pair assembly.

9. The circuit breaker as claimed in claim 1, wherein said entry chamfer (2a) allows insertion of said plug contact (1) in said pair of contact fingers (2) and said one or more profiles (2b) are adapted to create obstacles for said plug contact (1) to restrict insertion in said pair of contact fingers (2).

, Description:
TECHNICAL FIELD
[0001] The present disclosure relates to the field of circuit breaker, and more specifically, relates to a modular jaw contacts assembly (or modular contact assembly) for adjusting/ maintaining gap/ spacing of contact jaws of a withdrawable circuit breaker.

BACKGROUND
[0002] Background description includes information that may be useful in understanding the present invention. It is not an admission that any of the information provided herein is prior art or relevant to the presently claimed invention, or that any publication specifically or implicitly referenced is prior art.
[0003] The invention will be illustrated with particular reference to a preferred application in a low-voltage electrical power distribution network, although this is not to be understood as limiting, and in any event the invention applies in general to both medium and low-voltage networks.
[0004] Electrical switching apparatus, such as circuit breakers, provide protection for electrical systems from electrical fault conditions such as, for example, current overloads, short circuits, abnormal voltage and other fault conditions. Typically, circuit breakers include an operating mechanism which opens electrical contact assemblies to interrupt the flow of current trough the conductors of an electrical system in response to such fault conditions. A circuit breaker is an automatically operated electrical switch designed to protect an electrical circuit from damage caused by overcurrent, typically resulting from an overload or short circuit. Its basic function is to interrupt current flow after a fault is detected. Unlike a fuse, which operates once and then must be replaced, a circuit breaker can be reset (either manually or automatically) to resume normal operation.
[0005] Circuit breaker is a switching device designed to make, carry and break the circuit. A circuit breaker is an automatically operated electrical switch designed to protect an electrical circuit from damage caused by overcurrent, typically resulting from an overload or short circuit. Circuit breakers are generally installed to protect equipment from overcurrent (than its rated current) situations, for example, when a short circuit or ground fault occurs in an electrical supply conductor. Upon the occurrence of any such overcurrent condition, electrical contacts inside circuit breaker get opened, and stop supply of electrical current to equipment. Designs for circuit breakers generally include accommodations for both high quiescent currents and high withstand currents. To maintain a high withstand current rating, the contacts must be locked closed at the current withstand rating and be able to withstand the large electrodynamics repulsion forces generated by the current flow. With the increase of industry size and automation, the requirement of protection devices has also increased.
[0006] Large circuit breakers that carry thousands of amps of current are oftentimes installed into metal-enclosed switchgear assemblies (also called “switchboards”). Switchgears have large electrical conductors called bus bars (sometimes referred to as “buss bars”) that carry current from a power source, such as a power utility, through the circuit breakers, to loads that are protected by the circuit breaker. These large circuit breakers, which can weigh hundreds of pounds, are typically lifted into the switchgear and racked by mounting the circuit breakers into a draw out cradle. A manually controlled or remotely operated handle mechanism is inserted into the cradle to turn a crank that racks the circuit breaker into the switchgear and completes an electrical circuit which is protected by the breaker.
[0007] A draw-out high voltage circuit-breaker has to meet different electrical and mechanical endurance requirements. The preponderant influence of electrodynamics forces must be taken into consideration for high performance circuit-breakers. It is standard practice to fit the draw-out circuit breaker support chassis with a notching and/or securing system designed to counteract the mechanical stresses due to electrodynamics forces, in order to avoid the disconnecting carriage recoil. In the engaged position, the disconnect contacts fitted at the ends of the connectors of each pole nevertheless remain under the influence of mechanical stresses resulting from the vertical component of electrodynamics forces that tend to lift the pin and the associated connector.
[0008] Conventionally, a plug-in base for a circuit breaker is mounted on a panel board or other base structure and is wired to circuitry on the base structure. A circuit breaker unit is installed in the plug-in base by inserting stabs protruding from the circuit breaker unit into jaws fixed to the plug-in base. The jaw/stab connection provides the primary electrical connection between the circuit breaker unit and the plug-in base. This connection may also mechanically retain the circuit breaker in the plug-in base. In conventional breakers, coupling and uncoupling between the fixed part and the movable part of the breaker currently occur with the aid of a C-shaped supporting structure which accommodates a plurality of mutually parallel laminae or plates arranged in a pack-like configuration, forming on the front side and on the rear side contact openings or jaws which allow electrical connection to the electric power supply and distribution bars. The individual plates or laminae, arranged in a pack-like configuration, are supported by a supporting frame so that they can oscillate; in order to give the laminae of the jaws an elastic preloading, there is provided a set of springs which act on the individual laminae.
[0009] However in the conventional circuit breaker, the jaw contact assembly is not stable and is very complex, which requires simultaneous operation to be performed for its working. Further, in the conventional circuit breakers, the contact leaf or jaw fingers are not aligned. Furthermore, in the existing circuit breaker implementing jaw contact assembly, initial opening of contact leaf/ jaw fingers is not maintained.
[00010] Whereas there is certainly nothing wrong with existing circuit breaker, nonetheless, there still exist a need to provide an efficient, effective, reliable, and improved of circuit breakers with a modular jaw contacts assembly (or modular contact assembly) for adjusting/ maintaining gap/ spacing between contact jaws. Further, there is a need of a withdrawable unit or device (Draw-out module) that is used to connect, test, and disconnect the breaker or MCCB to a main bus without unbolt or disturbing the termination. Furthermore, there is a need of circuit breaker in which initial gap between jaw fingers and alignment of jaw fingers is maintained by modular contact assembly or modular jaw contact assembly.
[00011] All publications herein are incorporated by reference to the same extent as if each individual publication or patent application were specifically and individually indicated to be incorporated by reference. Where a definition or use of a term in an incorporated reference is inconsistent or contrary to the definition of that term provided herein, the definition of that term provided herein applies and the definition of that term in the reference does not apply.
[00012] In some embodiments, the numbers expressing quantities of ingredients, properties such as concentration, reaction conditions, and so forth, used to describe and claim certain embodiments of the invention are to be understood as being modified in some instances by the term “about”. Accordingly, in some embodiments, the numerical parameters set forth in the written description and attached claims are approximations that can vary depending upon the desired properties sought to be obtained by a particular embodiment. In some embodiments, the numerical parameters should be construed in light of the number of reported significant digits and by applying ordinary rounding techniques. Notwithstanding that the numerical ranges and parameters setting forth the broad scope of some embodiments of the invention are approximations, the numerical values set forth in the specific examples are reported as precisely as practicable. The numerical values presented in some embodiments of the invention may contain certain errors necessarily resulting from the standard deviation found in their respective testing measurements.
[00013] As used in the description herein and throughout the claims that follow, the meaning of “a,” “an,” and “the” includes plural reference unless the context clearly dictates otherwise. Also, as used in the description herein, the meaning of “in” includes “in” and “on” unless the context clearly dictates otherwise.
[00014] The recitation of ranges of values herein is merely intended to serve as a shorthand method of referring individually to each separate value falling within the range. Unless otherwise indicated herein, each individual value is incorporated into the specification as if it were individually recited herein. All methods described herein can be performed in any suitable order unless otherwise indicated herein or otherwise clearly contradicted by context. The use of any and all examples, or exemplary language (e.g. “such as”) provided with respect to certain embodiments herein is intended merely to better illuminate the invention and does not pose a limitation on the scope of the invention otherwise claimed. No language in the specification should be construed as indicating any non-claimed element essential to the practice of the invention.
[00015] Groupings of alternative elements or embodiments of the invention disclosed herein are not to be construed as limitations. Each group member can be referred to and claimed individually or in any combination with other members of the group or other elements found herein. One or more members of a group can be included in, or deleted from, a group for reasons of convenience and/or patentability. When any such inclusion or deletion occurs, the specification is herein deemed to contain the group as modified thus fulfilling the written description of all groups used in the appended claims.

OBJECTS OF THE INVENTION
[00016] An object of the present disclosure is to provide a modular jaw contacts assembly for adjusting the spacing of contact jaws of a withdrawable circuit breaker.
[00017] Another object of the present disclosure is to provide a withdraw able-unit (external accessories) of circuit breakers, in assembling jaw contact (leaf contacts) for its stability and reliability.
[00018] Another object of the present disclosure is to provide a withdraw able-unit or device (Draw-out module) that is used to connect, test, disconnect the breaker or MCCB to a main bus without unbolt or disturbing the termination.
[00019] Another object of the present disclosure is to provide a circuit breaker in which initial gap between jaw fingers and alignment of jaw fingers is maintained by a modular jaw arrangement.
[00020] Another object of the present disclosure is to provide a modular contact assembly.
[00021] Another object of the present disclosure is to provide a modular contact assembly that assembles or holds individual contact leaf assembly /jaw fingers pairs in its place for “N’ no. of operation.
[00022] Another object of the present disclosure is to provide a modular contact assembly to align and eliminate the jiggling and juddering of individual contact leaf after assembly or during operation.
[00023] Another object of the present disclosure is to provide a modular contact assembly that act as bridge for connecting two contacts/ bus.

SUMMARY
[00024] The present disclosure relates to the field of circuit breaker, and more specifically relates to, a modular jaw contacts assembly or modular contact assembly for adjusting/ maintaining gap/ spacing of contact jaws of a withdrawable circuit breaker.
[00025] Embodiments of the present disclosure provide an efficient, effective, reliable, improved modular jaw contacts assembly or modular contact assembly. Further, a modular jaw contacts assembly or modular contact assembly for adjusting/ maintaining gap/ spacing of contact jaws of a withdrawable circuit breaker.
[00026] Accordingly, an aspect of the present disclosure relates to a circuit breaker. In an aspect, the circuit breaker can include a plug contact and a cradle. In another aspect, the cradle having one or more jaw contacts, each of the one or more jaw contacts can include a plurality of contact fingers each provided in the form of a pair of contact fingers. In another aspect, said pair of contact fingers can include an entry chamfer and one or more profiles adapted to allow the plug contact to engage and disengage with said pair of contact fingers to establish an electrical connection. In another aspect, pair of contact fingers can be separated using a spacer pin.
[00027] In an aspect, the spacer pin can be encapsulated inside a contact spring.
[00028] In an aspect, the spacer pin can include a first end and a second end, and said first end and said second end can be adapted to rest on a leaf pair aligner guide provided on the pair of contact fingers.
[00029] In an aspect, a leaf pair aligner can be assembled in between said contact leaf pair aligner guide and said spacer pin.
[00030] In an aspect, pair of contact fingers can hold together by a spring holder.
[00031] In an aspect, spring holder can be mounted on a spring holder cavity provided on each of contact finger from said pair of contact fingers to hold together said pair of contact fingers forming a contact leaf pair assembly.
[00032] In an aspect, contact leaf pair assembly can be locked in a slot provided on a jaw contact assembly holder.
[00033] In an aspect, entry chamfer can allow insertion of said plug contact in said pair of contact fingers and said one or more profiles can be adapted to create obstacles for said plug contact to restrict insertion in said pair of contact fingers.
[00034] In contrast to the conventional circuit breaker, the present disclosure provides an efficient, effective, reliable, and improved of circuit breakers with a modular jaw contacts assembly (or modular contact assembly) for adjusting/ maintaining gap/ spacing between contact jaws. Further, in contrast to the existing circuit breaker, the present invention provides a withdrawable unit or device (Draw-out module) that is used to connect, test, and disconnect the breaker or MCCB to a main bus without unbolt or disturbing the termination. Furthermore, in contrast to the existing circuit breaker, the present invention provides circuit breaker in which initial gap between jaw fingers and alignment of jaw fingers is maintained by modular contact assembly or modular jaw contact assembly.
[00035] Further, in contrast to the existing conventional circuit breaker, the present invention provides a modular jaw contacts assembly or modular contact assembly for adjusting/ maintaining gap/ spacing of contact jaws of a withdrawable circuit breaker.
[00036] Various objects, features, aspects and advantages of the inventive subject matter will become more apparent from the following detailed description of preferred embodiments, along with the accompanying drawing figures in which like numerals represent like components.

BRIEF DESCRIPTION OF THE DRAWINGS
[00037] The accompanying drawings are included to provide a further understanding of the present disclosure, and are incorporated in and constitute a part of this specification. The drawings illustrate exemplary embodiments of the present disclosure and, together with the description, serve to explain the principles of the present disclosure. The diagrams are for illustration only, which thus is not a limitation of the present disclosure, and wherein:
[00038] FIG. 1 illustrates a jaw contact assembly with plug and termination, in accordance with an exemplary embodiment of the present disclosure.
[00039] FIG. 2 illustrates an isometric view of jaw contact assembly, in accordance with another exemplary embodiment of the present disclosure.
[00040] FIG. 3 illustrates a cradle of the proposed invention, in accordance with another exemplary embodiment of the present disclosure.
[00041] FIG. 4 illustrates a draw-out circuit breaker, in accordance with another exemplary embodiment of the present disclosure.
[00042] FIG. 5A illustrates an exploded view of leaf Pair assembly, in accordance with another exemplary embodiment of the present disclosure.
[00043] FIG. 5B illustrates a leaf Pair assembly, in accordance with another exemplary embodiment of the present disclosure.
[00044] FIG. 6A illustrates leaf Pair assembly with aligner plate, in accordance with another exemplary embodiment of the present disclosure.
[00045] FIG. 6B illustrates an exploded view of jaw contact assembly, in accordance with another exemplary embodiment of the present disclosure.
[00046] FIG. 6C illustrates a jaw contact assembly, in accordance with another exemplary embodiment of the present disclosure.
[00047] FIG. 7A illustrates a jaw contact assembly with termination, in accordance with another exemplary embodiment of the present disclosure.
[00048] FIG. 7B illustrates a side view of jaw contact assembly with termination, in accordance with another exemplary embodiment of the present disclosure.
[00049] FIG. 8 illustrates a contact holder/case, in accordance with an exemplary embodiment of the present disclosure.
[00050] FIG. 9 illustrates a jaw contact assembly aligner, in accordance with an exemplary embodiment of the present disclosure.

DETAILED DESCRIPTION
[00051] The following is a detailed description of embodiments of the disclosure depicted in the accompanying drawings. The embodiments are in such detail as to clearly communicate the disclosure. However, the amount of detail offered is not intended to limit the anticipated variations of embodiments; on the contrary, the intention is to cover all modifications, equivalents, and alternatives falling within the scope of the present disclosure as defined by the appended claims.
[00052] If the specification states a component or feature “may”, “can”, “could”, or “might” be included or have a characteristic, that particular component or feature is not required to be included or have the characteristic.
[00053] As used in the description herein and throughout the claims that follow, the meaning of “a,” “an,” and “the” includes plural reference unless the context clearly dictates otherwise. Also, as used in the description herein, the meaning of “in” includes “in” and “on” unless the context clearly dictates otherwise.
[00054] Exemplary embodiments will now be described more fully hereinafter with reference to the accompanying drawings, in which exemplary embodiments are shown. These exemplary embodiments are provided only for illustrative purposes and so that this disclosure will be thorough and complete and will fully convey the scope of the invention to those of ordinary skill in the art. The invention disclosed may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Various modifications will be readily apparent to persons skilled in the art. The general principles defined herein may be applied to other embodiments and applications without departing from the scope of the invention. Moreover, all statements herein reciting embodiments of the invention, as well as specific examples thereof, are intended to encompass both structural and functional equivalents thereof. Additionally, it is intended that such equivalents include both currently known equivalents as well as equivalents developed in the future (i.e., any elements developed that perform the same function, regardless of structure). Also, the terminology and phraseology used is for the purpose of describing exemplary embodiments and should not be considered limiting. Thus, the present invention is to be accorded the widest scope encompassing numerous alternatives, modifications and equivalents consistent with the principles and features disclosed. For purpose of clarity, details relating to technical material that is known in the technical fields related to the invention have not been described in detail so as not to unnecessarily obscure the present invention.
[00055] Each of the appended claims defines a separate invention, which for infringement purposes is recognized as including equivalents to the various elements or limitations specified in the claims. Depending on the context, all references below to the "invention" may in some cases refer to certain specific embodiments only. In other cases it will be recognized that references to the "invention" will refer to subject matter recited in one or more, but not necessarily all, of the claims.
[00056] All methods described herein can be performed in any suitable order unless otherwise indicated herein or otherwise clearly contradicted by context. The use of any and all examples, or exemplary language (e.g., “such as”) provided with respect to certain embodiments herein is intended merely to better illuminate the invention and does not pose a limitation on the scope of the invention otherwise claimed. No language in the specification should be construed as indicating any non-claimed element essential to the practice of the invention.
[00057] Various terms as used herein are shown below. To the extent a term used in a claim is not defined below, it should be given the broadest definition persons in the pertinent art have given that term as reflected in printed publications and issued patents at the time of filing.
[00058] The present disclosure relates to the field of circuit breaker, and more specifically relates to, a modular jaw contacts assembly (or modular contact assembly) for adjusting/ maintaining gap/ spacing between contact jaws of a withdrawable circuit breaker.
[00059] Embodiments of the present disclosure provide an efficient, effective, reliable, improved modular jaw contacts assembly or modular contact assembly. Further, a modular jaw contacts assembly or modular contact assembly for adjusting/ maintaining gap/ spacing of contact jaws of a withdrawable circuit breaker.
[00060] Accordingly, an aspect of the present disclosure relates to a circuit breaker. In an aspect, the circuit breaker can include a plug contact and a cradle. In another aspect, the cradle having one or more jaw contacts, each of the one or more jaw contacts can include a plurality of contact fingers each provided in the form of a pair of contact fingers. In another aspect, said pair of contact fingers can include an entry chamfer and one or more profiles adapted to allow the plug contact to engage and disengage with said pair of contact fingers to establish an electrical connection. In another aspect, pair of contact fingers can be separated using a spacer pin.
[00061] In an aspect, the spacer pin can be encapsulated inside a contact spring.
[00062] In an aspect, the spacer pin can include a first end and a second end, and said first end and said second end can be adapted to rest on a leaf pair aligner guide provided on the pair of contact fingers.
[00063] In an aspect, a leaf pair aligner can be assembled in between said contact leaf pair aligner guide and said spacer pin.
[00064] In an aspect, pair of contact fingers can hold together by a spring holder.
[00065] In an aspect, spring holder can be mounted on a spring holder cavity provided on each of contact finger from said pair of contact fingers to hold together said pair of contact fingers forming a contact leaf pair assembly.
[00066] In an aspect, contact leaf pair assembly can be locked in a slot provided on a jaw contact assembly holder.
[00067] In an aspect, entry chamfer can allow insertion of said plug contact in said pair of contact fingers and said one or more profiles can be adapted to create obstacles for said plug contact to restrict insertion in said pair of contact fingers.
[00068] In contrast to the conventional circuit breaker, the present disclosure provides an efficient, effective, reliable, and improved of circuit breakers with a modular jaw contacts assembly (or modular contact assembly) for adjusting/ maintaining gap/ spacing between contact jaws. Further, in contrast to the existing circuit breaker, the present invention provides a withdrawable unit or device (Draw-out module) that is used to connect, test, and disconnect the breaker or MCCB to a main bus without unbolt or disturbing the termination. Furthermore, in contrast to the existing circuit breaker, the present invention provides circuit breaker in which initial gap between jaw fingers and alignment of jaw fingers is maintained by modular contact assembly or modular jaw contact assembly.
[00069] Further, in contrast to the existing conventional circuit breaker, the present invention provides a modular jaw contacts assembly or modular contact assembly for adjusting/ maintaining gap/ spacing of contact jaws of a withdrawable circuit breaker.
[00070] For the simplicity of understanding of the subject matter, following reference numerals are used for associated/corresponding feature/elements of the proposed circuit breaker:
1. Plug
2. Contact leaf
3. Fixed contact terminal Assembly
4. Contact leaf holder/case
5. Cradle/withdrawable unit
6. Jaw contact assembly in withdrawable unit
7. Draw-out circuit breaker
8. Encapsulated Spacer pin
9. Spring holder
10. Extension spring
11. Leaf pair aligner plate
12. Jaw Contact assembly aligner
13. Jaw contact assembly holder
14. Case locking slot
15. Leaf pair aligner guide
16. Spring holder cavity
17. Contact leaf stacked on either side and held with springs
18. Other elements (non-essential for understanding of the present subject matter seeking protection.)
19. Leaf pair aligner
[00071] In an embodiment, withdrawable unit (Draw-out module) can be an arrangement which is used to connect, test, and disconnect the breaker or MCCB to the main bus without unbolt or disturbing the termination. With the help of mechanism, the MCCB can be connected to main and auxiliary supplies. In draw-out module, the plug-in can be used as base which is having main contacts. Two types of supplies are in the switchboard. One is main supply or power supply and auxiliary supply or control supply. The main supply is for breaker and auxiliary supply is for auxiliaries like shunt release, UV release, etc... Three positions are in the draw-out to show the operator where the MCCB is present. They are ‘DISCONNECTION’ (both Aux. connections and power connections not connected) ‘TEST’ (Aux. connections only connected but not power supply) ‘CONNECTION’ (both Aux. connections and power connections established). In the ‘TEST’ position, the auxiliaries are able to be tested alone. The MCCB should be in tripped position so that safety operation is possible during draw-out operation. In accordance to the embodiment of the present invention, the plug contact in the circuit breaker can engage with jaw contacts of cradle which is connected to main supply. The each jaw contacts assembly can include plurality of jaw fingers or contact leafs (contact fingers). This invention pertains to jaw contact assembly having openings in which the male part called plug of circuit breaker engages and disengages from the main supply. The assembly of jaw contact can be reliable and the structure cannot be disturbed where in the connection is established by plug of the circuit breaker by opposing the contacts loaded with spring. The structurally stable and reliable assembly can be necessary as the connection and disconnection occurs ‘N’ no of times. The present invention of contact assembly structure can be very simple in basic and can be adapted to MCCB’s and ACB’s
[00072] FIG. 1 illustrates a jaw contact assembly with plug and termination, in accordance with an exemplary embodiment of the present disclosure.
[00073] In an embodiment, the circuit breaker can include the plug contact (1); and a cradle. The cradle having one or more jaw contacts, each of the one or more jaw contacts can include a plurality of contact fingers configured in the form of a pair of contact fingers (2). The pair of contact fingers (2) can include an entry chamfer (2a) and one or more profiles (2b) adapted to allow the plug contact (1) to engage and disengage with said pair of contact fingers (2) to establish an electrical connection.
[00074] In an embodiment, entry chamfer (2a) can allow insertion of said plug contact (1) in said pair of contact fingers (2) and said one or more profiles (2b) can be adapted to create obstacles for said plug contact (1) to restrict insertion in said pair of contact fingers (2).
[00075] FIG. 2 illustrates an isometric view of jaw contact assembly, in accordance with another exemplary embodiment of the present disclosure.
[00076] As shown in FIG. 2, the circuit breaker can include the plug contact (1); and a cradle. The cradle having one or more jaw contacts, each of the one or more jaw contacts can include a plurality of contact fingers configured in the form of a pair of contact fingers (2). FIG. 2 illustrates contact leaf stacked on either side and held with springs 17. The leaf pair assembly can be stacked according to the need.
[00077] FIG. 3 illustrates a cradle of the proposed invention, in accordance with another exemplary embodiment of the present disclosure. FIG.3 illustrates cradle or withdrawable unit 5 and jaw contact assembly in withdrawable unit 6.
[00078] FIG. 4 illustrates a draw-out circuit breaker, in accordance with another exemplary embodiment of the present disclosure. FIG. 4 illustrates other elements 18 to convert it to draw-out breaker.
[00079] FIG. 5A illustrates an exploded view of leaf Pair assembly, in accordance with another exemplary embodiment of the present disclosure. FIG. 5A illustrates the individual contact leaf (2) can be assembled to gather to form a contact leaf pair.
[00080] FIG. 5A shows the exploded view where the parts can be assembled and held together by an elastic member called contact spring (10). This is a sub system where the two pairs of contact leaf (2) can be separated by a spacer pin (8). The novelty of encapsulating spacer pin (8) in an extension spring. The spacer pin (8) end surface rests on a leaf pair aligner guide (15). The spring holder (9) firmly located on spring holder cavity (16) of two contact leaf (2). The two leaf pair can be hooked onto the contact spring forming a contact leaf pair assembly as shown in FIG. 5A.
[00081] In an embodiment, the spacer pin (8) can include a first end and a second end, wherein said first end and said second end can be adapted to rest on a leaf pair aligner guide (15) provided on the pair of contact fingers (2).
[00082] In an embodiment, a leaf pair aligner plate (11) can be assembled in between said contact leaf pair aligner guide (15) and said spacer pin (8).
[00083] In an embodiment, spring holder (9) can be mounted on a spring holder cavity (16) provided on each of contact finger from said pair of contact fingers (2) to held together said pair of contact fingers (2) forming a contact leaf pair assembly.
[00084] FIG. 5B illustrates a leaf Pair assembly, in accordance with another exemplary embodiment of the present disclosure. FIG. 5B illustrates the individual contact leaf (2) can be assembled to gather to form a contact leaf pair.
[00085] FIG. 5B shows the exploded view where the parts can be assembled and held together by an elastic member called contact spring (10). This is a sub system where the two pairs of contact leaf (2) can be separated by a spacer pin (8). The novelty of encapsulating spacer pin (8) in an extension spring. The spacer pin (8) end surface rests on a leaf pair aligner guide (15). The spring holder (9) firmly located on spring holder cavity (16) of two contact leaf (2). The two leaf pair can be hooked onto the contact spring forming a contact leaf pair assembly as shown in FIG. 5B.
[00086] In an embodiment, the spacer pin (8) can include a first end and a second end, wherein said first end and said second end can be adapted to rest on a leaf pair aligner guide (15) provided on the pair of contact fingers (2).
[00087] In an embodiment, a leaf pair aligner plate (11) can be assembled in between said contact leaf pair aligner guide (15) and said spacer pin (8).
[00088] In an embodiment, spring holder (9) can be mounted on a spring holder cavity (16) provided on each of contact finger from said pair of contact fingers (2) to held together said pair of contact fingers (2) forming a contact leaf pair assembly.
[00089] FIG. 6A illustrates leaf Pair assembly with aligner plate, in accordance with another exemplary embodiment of the present disclosure.
[00090] As shown in FIG. 6A, the leaf pair aligner plate (11) can be assembled in between the contact leaf pair aligner guide (15) and spacer pin (8) encapsulated by contact spring (10).
[00091] FIG. 6B illustrates an exploded view of jaw contact assembly, in accordance with another exemplary embodiment of the present disclosure.
[00092] In an embodiment, a leaf pair aligner plate (11) can be assembled in between said contact leaf pair aligner guide (15) and said spacer pin (8). The individual leaf pair assembly can be stacked according to the need to form jaw contact assembly as shown in FIG. 6B.
[00093] FIG. 6C illustrates a jaw contact assembly, in accordance with another exemplary embodiment of the present disclosure.
[00094] FIG. 7A illustrates a jaw contact assembly with termination, in accordance with another exemplary embodiment of the present disclosure. FIG. 7B illustrates a side view of jaw contact assembly with termination, in accordance with another exemplary embodiment of the present disclosure.
[00095] FIG. 8 illustrates a contact holder/case, in accordance with an exemplary embodiment of the present disclosure. As shown in FIG. 8, the leaf pair aligner plate (11) can be assembled in between said contact leaf pair aligner guide (15) and said spacer pin (8). The contact leaf pair assembly can be locked in a slot (14) provided on a jaw contact assembly holder (13).
[00096] In an embodiment, the leaf pair assembly can be stacked according to the requirement as there is no restriction in number of leaf pair assembly to be stacked accordingly the leaf pair aligner plate (11) length and contact leaf holder can be used.
[00097] In an embodiment, the jaw contact assembly holder (13) comprises a leaf pair aligner (19) to maintain a space between two individual contacts leafs as well as avoid tilting on one side of a leaf pair assembly as shown FIG. 7B.
[00098] FIG. 9 illustrates a jaw contact assembly aligner 11, in accordance with an exemplary embodiment of the present disclosure.
[00099] In an embodiment, the draw-out module can be an arrangement which is used to connect and disconnect circuit breakers (MCCB/ACB) with minimum effort to the main bus without unbolt or disturbing the panel board circuit. Draw-out can be categorized in two basic types as per construction, fixed part known as cradle 1, usually the jaw contact assembly which are spring loaded (socket) can be as part of, which is fixed in panel and removable part known as draw-out breaker (7) where plug is as part of. With the help of mechanism, the draw-out breaker can be moved in and out of cradle (5). Thus plug (1) can be inserted in and out of jaw contacts which are spring loaded the former to carry current for operation and later to isolate breaker for maintenance. The jaw contacts assembly is necessary to be structurally stable and reliable throughout its life apart from its electrical performance and this involves assembly of contact leafs in a right way. In order to assemble the contact leafs to gather with spring loaded and modular in construction, the construction is simplified in a novel way. The bygone method does have few cons like bulky with intricate assembly and manufacturing. The assembly can include a spacer pin (8) encapsulated by a contact spring (10), the contact leafs (2) are hooked on either side of the contact spring on both the ends with help of a plate called spring holder (9) rested on spring holder cavity (16) this arrangement helps to hold parts in place to perform their intended function. Now this assembly is called leaf pair assembly as shown in Fig. 5b. The individual leaf pair assembly can be stacked according to the need to form jaw contact assembly as shown In Fig 6B. The leaf pair aligner plate (11) can be assembled in between the contact leaf pair aligner guide (15) and spacer pin (8) encapsulated by contact spring (10) as shown in Fig 6A. The leaf pair aligner plate (11) can provide better ground for spacer pin (8) to maintain space between the leaf pairs. The maintaining of intended space is crucial as it directly affects the operating force. The leaf pair assembly can be stacked according to the need and finally the contact leaf holder is placed and locked in the slot (14) with (11). The feature (12) can be used to align or prevent it from skewing. The feature jaw contact assembly holder (13) can hold or cases the entire extreme contact leafs. This casing helps holding the entire assembly in place. It is like a shield or a case. Now the leaf pair assembly can be stacked according to the requirement as there is no restriction in number of leaf pair assembly to be stacked accordingly the leaf pair aligner plate (11) length and contact leaf holder shall be used. The system can be modular so that say instead a single long stack 20 leaf pairs of jaw contact assembly, four jaw contact assembly can be in place with each jaw contact assembly containing five stack of leaf pair assembly.
[000100] In an embodiment, the individual contact leaf (2) can be assembled to gather to form a contact leaf pair a shown in FIG 5B and FIG. 5A shows the exploded view how the parts are assembled and held together by an elastic member called contact spring (10). This is a sub system where the two pairs of contact leaf (2) are separated by a spacer pin (8). The novelty of encapsulating spacer pin in an extension spring. The spacer pin end surface rests on a leaf pair aligner guide (15). The spring holder (9) firmly located on spring holder cavity (16) of two contact leaf (2). The two leaf pair can be hooked onto the contact spring forming a contact leaf pair assembly as shown in FIG 5B and FIG. 5A.
[000101] In an embodiment, the individual leaf pair assembly can be stacked according to the need to form jaw contact assembly as shown in FIG. 6B. The leaf pair aligner plate (11) is assembled in between the contact leaf pair aligner guide (15) and spacer pin (8) encapsulated by contact spring (10) as shown in FIG. 6A. The leaf pair aligner plate (11) can provide better ground for spacer pin (8) to maintain space between the leaf pairs. The maintaining of intended space is crucial as it directly affects the operating force. The leaf pair assembly can be stacked according to the need and finally the contact leaf holder is placed and locked in the slot (14) with (11). The feature (12) can be used to align or prevent it from skewing. The feature jaw contact assembly holder (13) can hold or case the entire extreme contact leafs. This casing helps holding the entire assembly in place.
[000102] It may be appreciated that, this type of novel construction of contacts can be used in different applications such as in bus bar systems in connecting two bus bars in same plane and also in bus bar trunking system. Horizontal to vertical connection is also possible.
[000103] The foregoing description of the specific embodiments will so fully reveal the general nature of the invention that others can, by applying current knowledge, readily modify and/or adapt for various applications such specific embodiments without departing from the generic concept, and, therefore, such adaptations and modifications should and are intended to be comprehended within the meaning and range of equivalents of the disclosed embodiments. It is to be understood that the phraseology or terminology employed herein is for the purpose of description and not of limitation.
[000104] It should be apparent to those skilled in the art that many more modifications besides those already described are possible without departing from the inventive concepts herein. Moreover, in interpreting both the specification and the claims, all terms should be interpreted in the broadest possible manner consistent with the context. In particular, the terms “comprises” and “comprising” should be interpreted as referring to elements, components, or steps in a non-exclusive manner, indicating that the referenced elements, components, or steps may be present, or utilized, or combined with other elements, components, or steps that are not expressly referenced. Where the specification claims refers to at least one of something selected from the group consisting of A, B, C ….and N, the text should be interpreted as requiring only one element from the group, not A plus N, or B plus N, etc. The foregoing description of the specific embodiments will so fully reveal the general nature of the embodiments herein that others can, by applying current knowledge, readily modify and/or adapt for various applications such specific embodiments without departing from the generic concept, and, therefore, such adaptations and modifications should and are intended to be comprehended within the meaning and range of equivalents of the disclosed embodiments. It is to be understood that the phraseology or terminology employed herein is for the purpose of description and not of limitation. Therefore, while the embodiments herein have been described in terms of preferred embodiments, those skilled in the art will recognize that the embodiments herein can be practiced with modification within the scope of the appended claims.
[000105] While embodiments of the present disclosure have been illustrated and described, it will be clear that the disclosure is not limited to these embodiments only. Numerous modifications, changes, variations, substitutions, and equivalents will be apparent to those skilled in the art, without departing from the scope of the disclosure, as described in the claims.
[000106] In the description of the present specification, reference to the term "one embodiment," "an embodiments", "an example", "an instance", or "some examples" and the description is meant in connection with the embodiment or example described The particular feature, structure, material, or characteristic included in the present invention, at least one embodiment or example. In the present specification, the term of the above schematic representation is not necessarily for the same embodiment or example. Furthermore, the particular features structures, materials, or characteristics described in any one or more embodiments or examples in proper manner. Moreover, those skilled in the art can be described in the specification of different embodiments or examples are joined and combinations thereof.
[000107] All of the features disclosed in this specification (including any accompanying claims, abstract and drawings), and/or all of the steps of any method or process so disclosed, may be combined in any combination, except combinations where at least some of such features and/or steps are mutually exclusive.
[000108] Each feature disclosed in this specification (including any accompanying claims, abstract and drawings) may be replaced by alternative features serving the same, equivalent or similar purpose, unless expressly stated otherwise. Thus, unless expressly stated otherwise, each feature disclosed is one example only of a generic series of equivalent or similar features.
[000109] The invention is not restricted to the details of the foregoing embodiment(s). The invention extends to any novel one, or any novel combination, of the features disclosed in this specification (including any accompanying claims, abstract and drawings), or to any novel one, or any novel combination, of the steps of any method or process so disclosed.
[000110] While the foregoing describes various embodiments of the invention, other and further embodiments of the invention may be devised without departing from the basic scope thereof. The scope of the invention is determined by the claims that follow. The invention is not limited to the described embodiments, versions or examples, which are included to enable a person having ordinary skill in the art to make and use the invention when combined with information and knowledge available to the person having ordinary skill in the art.

ADVANTAGES OF THE INVENTION
[000111] The present disclosure provides a modular jaw contacts assembly to adjusting the spacing of contact jaws of a withdrawable circuit breaker.
[000112] The present disclosure provides a withdraw able-unit (external accessories) of circuit breakers, in assembling jaw contact (leaf contacts) for its stability and reliability.
[000113] The present disclosure provides a withdraw able-unit or device (Draw-out module) that is used to connect, test, disconnect the breaker or MCCB to a main bus without unbolt or disturbing the termination.
[000114] The present disclosure provides a circuit breaker in which initial gap between jaw fingers and alignment of jaw fingers is maintained by a modular jaw arrangement.
[000115] The present invention provides a modular contact assembly.
[000116] The present disclosure provides a modular contact assembly that assembles or holds individual contact leaf assembly /jaw fingers pairs in its place for “N’ no. of operation.
[000117] The present disclosure provides a modular contact assembly to align and eliminate the jiggling and juddering of individual contact leaf after assembly or during operation.
[000118] The present disclosure provides a modular contact assembly that act as bridge for connecting two contacts/ bus.
[000119] The present disclosure provides a solid support for the assembly to avoid collapsing due to juddering.
[000120] The present disclosure provides a modular contact assembly that maintains consistent (initial opening) gap between any pair of contact leafs in the assembly
[000121] The present disclosure provides a modular contact assembly that eliminates alignment issue on all direction.