Claims:
1. A contact resetting assembly for a circuit breaker for contact resetting of a contact assembly of the circuit breaker, the contact resetting assembly comprising:
a fixed link configured with a cassette of the contact assembly;
a slider link configured to move between a first position and a second position relative to the fixed link; and
a pair of compression springs guided by a pair of pins comprising a cylinder pin and a guide pin configured between the fixed link and slider link, the pair of compression springs configured to enable movement of the slider link between the first position and the second position when the compression spring gets loaded and unloaded, respectively,
wherein the pair of compression springs are operatively coupled to a resetting pin that is coupled to a latch link of a mechanism assembly of the circuit breaker, and the latch link is operatively coupled to a moving contact of the contact assembly such that unloading of the pair of compression spring exert an upward force on the latch link to enable movement of the moving contact of the contact assembly form a flipped position to a normal position, thereby enabling contact resetting of the contact assembly.
2. The contact resetting assembly as claimed in claim 1, wherein the contact resetting assembly comprises a pair of rivets slidably configured with a pair of slots of the slider link to allow sliding of the slider link between the first position and the second position.
3. The contact resetting assembly as claimed in claim 1, wherein the fixed link is coupled to the cassette of the contact assembly with assistance of mounting pins.
4. A circuit breaker comprising:
a contact assembly having a moving contact which gets deflected to a flipped position from a normal position;
a mechanism assembly; and
a contact resetting assembly comprising:
a fixed link configured with a cassette of the contact assembly;
a slider link configured to move between a first position and a second position relative to the fixed link; and
a pair of compression springs guided by a pair of pins comprising a cylinder pin and a guide pin configured between the fixed link and slider link, the pair of compression springs configured to enable movement of the slider link between the first position and the second position when the pair of compression spring gets loaded and unloaded, respectively,
wherein the pair of compression springs are operatively coupled to a resetting pin that is coupled to a latch link of the mechanism assembly of the circuit breaker, and the latch link is operatively coupled to the moving contact of the contact assembly such that unloading of the pair of compression spring exert an upward force on the latch link to enable movement of the moving contact of the contact assembly form the flipped position to normal position, thereby enabling contact resetting of the contact assembly.
5. The circuit breaker as claimed in claim 5, wherein the contact resetting assembly comprises a pair of rivets slidably configured with a pair of slots of the slider link to allow sliding of the slider link between the first position and the second position.
6. The circuit breaker as claimed in claim 5, wherein the fixed link is coupled to the cassette of the contact assembly with assistance of mounting pins.
7. The circuit breaker as claimed in claim 5, wherein the contact assembly also comprises a shaft assembly, a compression spring, and a shaft centre pin.
8. The circuit breaker as claimed in claim 5, wherein the mechanism assembly also comprises an upper link, a trip plate, a latch bracket, a knob, a fork, and a main spring.
9. The circuit breaker as claimed in claim 8, wherein when the circuit breaker gets trip command the trip plate stars rotating in a clockwise direction, and once the trip plate gets fully rotated the latch bracket also start rotating in the clockwise direction by virtue of forces exerted on the latch link by means of backpressure of the contact assembly and the main spring force.
, Description:
TECHNICAL FIELD
[0001] The present disclosure relates generally to the field of circuit breakers. In particular, the present disclosure relates to a compression spring based contact resetting assembly for contact resetting of a contact assembly of a molded case circuit breakers to make the circuit breaker more efficient while tripping operation.

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] Circuit Breaker is an electro-mechanical switching device capable of making, carrying and breaking currents also known as over current protective device. Under normal circuit conditions it makes the circuit closed, carry current for a specified time and breaks the circuit under specified abnormal circuit conditions.
[0004] Circuit Breaker is employed for current interruption. More particularly molded case circuit breakers (MCCBs) are utilized to protect instruments from damage during adverse conditions prevailing during the operation of the circuit in which the molded case circuit breaker is employed. During adverse conditions like short circuit, the current rises to an alarmingly high level. This high current may cause damage to the parts in the electrical system. Hence during these conditions, the circuit has to be opened to protect the parts after the breaker.
[0005] A circuit breaker can be manually opened and closed, as well as automatically opened to protect conductors or equipment’s from damage caused by excessive heating due to over current in abnormal conditions such as overload or short-circuit. Circuit breakers are mainly designed based on requirements either to have high service breaking capacity or to have a short circuit withstand capacity. For example, a circuit breaker having high short circuit breaking capacity, the contact configuration is designed to act ultra-fast during the very high fault conditions in order to limit the damage due to the arc and also to limit the mechanical and temperature stresses induced in to the system during fault duration. So by virtue of the contact arrangement the contact configuration have very little ability to retain the contacts in the mating position against high fault current thus having very low withstand capacity. Once the contacts get flipped it is necessary to restore its position before the next closing cycle. A typical mechanism is used to take care of that but in some cases if the typical mechanism fails to do. So there is a need to provide an extra support mechanism in order to establish the contact resetting (i.e. restoring of rotary shaft/ moving contact).
[0006] There is, therefore a need in art to provide a simple and cost effective contact resetting assembly for a circuit breaker for contact resetting of a contact assembly of a circuit breaker to make the circuit breaker more efficient while tripping operation.
[0007] 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.
[0008] 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.
[0009] 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.
[0010] 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.
[0011] 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
[0012] A general object of the present invention is to provide an improved circuit breaker.
[0013] Another object of the present invention is to provide simple and cost effective contact resetting assembly for contact resetting of a contact assembly of a circuit breaker.
[0014] Another object of the present invention is to provide compression springs based booster mechanism for contact resetting of a contact assembly of a circuit breaker when the contact gets flipped due to short circuit.
[0015] Another object of the present invention is to provide a contact resetting assembly for a circuit breaker for contact resetting of a contact assembly of the circuit breaker to make the circuit breaker more efficient while tripping operation.

SUMMARY
[0016] The present disclosure relates generally to the field of circuit breakers. In particular, the present disclosure relates to a compression spring based contact resetting assembly for contact resetting of a contact assembly of a molded case circuit breaker to make the circuit breaker more efficient while tripping operation. The disclosed compression spring based contact resetting assembly gives an extra push to a mechanism in trip condition so that flipped contacts can restore its original position.
[0017] In an aspect, the present disclosure provides a contact resetting assembly for a molded case circuit breaker for contact resetting of a contact assembly. The contact resetting assembly can include a fixed link configured with a cassette of the contact assembly; a slider link configured to move between a first position and a second position relative to the fixed link; and a pair of compression springs guided by a pair of pins comprising a cylinder pin and a guide pin configured between the fixed link and slider link, the pair of compression springs configured to enable movement of the slider link between the first position and the second position when the compression spring gets loaded and unloaded, respectively.
[0018] In an embodiment, the pair of compression springs are operatively coupled to a resetting pin that is coupled to a latch link of a mechanism assembly of the circuit breaker, and the latch link is operatively coupled to a moving contact of the contact assembly such that unloading of the pair of compression spring exert an upward force on the latch link to enable movement of the moving contact of the contact assembly form a flipped position to a normal position, thereby enabling contact resetting of the contact assembly.
[0019] In an embodiment, the pair of compression spring gets loaded when the sliding link1B gets suppressed in down word direction by the reseting pin 2J when the breaker is reseted in reset position from trip position as shown in fig.1C.theresting pin is pushed downwards when the fork 2F pushes it .in this process the compression springs 1C gets compressed and restore the energy
[0020] In an embodiment, the pair of compression spring gets unloaded when when a trip command is given to the trip plate 2C.It rotates in clockwise direction and releases the latch bracket 2Dand it also starts moving in clockwise direction. hence the latch link 2A is released in upward direction as shown in fig.1D.the latch link moves in upward direction due to force release by compression springs 1C.which are compresed in reset condition
[0021] In an embodiment, the contact resetting assembly can include a pair of rivets slidably configured with a pair of slots of the slider link to allow sliding of the slider link between the first position and the second position.
[0022] In an embodiment, the fixed link is coupled to the cassette of the contact assembly with assistance of mounting pins.
[0023] In another aspect of the present disclosure provides a circuit breaker (also referred to as molded case circuit breaker hereinafter) can include a contact assembly having a moving contact which gets deflected to a flipped position from a normal position due to short-circuit; a mechanism assembly; and a contact resetting assembly.
[0024] In an embodiment, the contact resetting assembly can include a fixed link configured with a cassette of the contact assembly; a slider link configured to move between a first position and a second position relative to the fixed link; and a pair of compression springs guided by a pair of pins including a cylinder pin and a guide pin configured between the fixed link and slider link, the pair of compression springs configured to enable movement of the slider link between the first position and the second position when the pair of compression spring gets loaded and unloaded, respectively, wherein the pair of compression springs are operatively coupled to a resetting pin that is coupled to a latch link of the mechanism assembly of the circuit breaker, and the latch link is operatively coupled to the moving contact of the contact assembly such that unloading of the pair of compression spring exert an upward force on the latch link to enable movement of the moving contact of the contact assembly form the flipped position to normal position, thereby enabling contact resetting of the contact assembly.
[0025] In an embodiment, the contact resetting assembly can include a pair of rivets slidably configured with a pair of slots of the slider link to allow sliding of the slider link between the first position and the second position.
[0026] In an embodiment, the fixed link is coupled to the cassette of the contact assembly with assistance of mounting pins.
[0027] In an embodiment, the contact assembly can include a shaft assembly, a compression spring, and a shaft centre pin.
[0028] In an embodiment, the mechanism assembly can include an upper link, a trip plate, a latch bracket, a knob, a fork, and a main spring.
[0029] In an embodiment, when the circuit breaker gets trip command the trip plate stars rotating in a clockwise direction, and once the trip plate gets fully rotated the latch bracket also start rotating in the clockwise direction by virtue of forces exerted on the latch link by means of backpressure of the contact assembly and the main spring force.
[0030] In an embodiment, loading of the pair of compression springs can be occurred when the slider link gets suppressed in downward direction by the resetting pin when the breaker is reset in reset position from trip position. There resetting pin is pushed downwards by the fork. In this loading the compression springs get compressed and restore the energy.
[0031] In an embodiment, unloading of the pair of pair of compression springs can be occurred when a trip command is given to the trip plate. The trip plate starts rotating in clockwise direction and releases the latch bracket such that the latch bracket also starts moving in clockwise direction. Hence the latch link is released in upward direction. The latch link moves in upward direction due to force release by compression springs which are compressed in loading condition.
[0032] 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 DRAWINGS
[0033] 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:
[0034] FIGs. 1A to 1D illustrate exemplary front view representations of a circuit breaker with a contact assembly in flipped condition, in closed condition, in OFF condition, and in tripped condition, respectively, in accordance of embodiment of the present disclosure.
[0035] FIGs. 2A and 2B illustrate exemplary isometric view representations of a contact resetting assembly of a circuit breaker in loaded and unloaded condition, respectively, in accordance of embodiment of the present disclosure.
[0036] FIG. 3 illustrates an exemplary exploded view representation of the proposed contact resetting assembly of a circuit breaker, in accordance of embodiment of the present disclosure.
[0037] FIGs. 4A and 4B illustrate exemplary side view representations of a contact assembly of a circuit breaker in flipped condition and normal condition, respectively, in accordance of embodiment of the present disclosure.
[0038] FIG. 5 illustrates an exemplary representation of a circuit breaker with contact resetting assembly, in accordance of embodiment of the present disclosure.
DETAILED DESCRIPTION
[0039] 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.
[0040] 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.
[0041] 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.
[0042] 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.
[0043] 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.
[0044] 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.
[0045] 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.
[0046] The present disclosure relates generally to the field of circuit breakers. In particular, the present disclosure relates to a compression spring based contact resetting assembly for contact resetting of a contact assembly of a molded case circuit breaker to make the circuit breaker more efficient while tripping operation. The contact resetting assembly provides an extra force to achieve TRIP protection when contacts are flipped during short circuit or overload condition.
[0047] In an aspect, the present disclosure provides a contact resetting assembly for a molded case circuit breaker for contact resetting of a contact assembly of the circuit breaker. The contact resetting assembly can include a fixed link configured with a cassette of the contact assembly; a slider link configured to move between a first position and a second position relative to the fixed link; and a pair of compression springs guided by a pair of pins comprising a cylinder pin and a guide pin configured between the fixed link and slider link, the pair of compression springs configured to enable movement of the slider link between the first position and the second position when the compression spring gets loaded and unloaded, respectively.
[0048] In an embodiment, the pair of compression springs are operatively coupled to a resetting pin that is coupled to a latch link of a mechanism assembly of the circuit breaker, and the latch link is operatively coupled to a moving contact of the contact assembly such that unloading of the pair of compression spring exert an upward force on the latch link to enable movement of the moving contact of the contact assembly form a flipped position to a normal position, thereby enabling contact resetting of the contact assembly.
[0049] In an embodiment, the contact resetting assembly can include a pair of rivets slidably configured with a pair of slots of the slider link to allow sliding of the slider link between the first position and the second position.
[0050] In an embodiment, the fixed link is coupled to the cassette of the contact assembly with assistance of mounting pins.
[0051] In another aspect of the present disclosure provides a circuit breaker (also referred to as molded case circuit breaker hereinafter) can include a contact assembly having a moving contact which gets deflected to a flipped position from a normal position due to short circuit or overload; a mechanism assembly; and a contact resetting assembly.
[0052] In an embodiment, the contact resetting assembly can include a fixed link configured with a cassette of the contact assembly; a slider link configured to move between a first position and a second position relative to the fixed link; and a pair of compression springs guided by a pair of pins including a cylinder pin and a guide pin configured between the fixed link and slider link, the pair of compression springs configured to enable movement of the slider link between the first position and the second position when the pair of compression spring gets loaded and unloaded, respectively, wherein the pair of compression springs are operatively coupled to a resetting pin that is coupled to a latch link of the mechanism assembly of the circuit breaker, and the latch link is operatively coupled to the moving contact of the contact assembly such that unloading of the pair of compression spring exert an upward force on the latch link to enable movement of the moving contact of the contact assembly form the flipped position to normal position, thereby enabling contact resetting of the contact assembly.
[0053] In an embodiment, the contact resetting assembly can include a pair of rivets slidably configured with a pair of slots of the slider link to allow sliding of the slider link between the first position and the second position.
[0054] In an embodiment, the fixed link is coupled to the cassette of the contact assembly with assistance of mounting pins.
[0055] In an embodiment, the contact assembly can include a shaft assembly, a compression spring, and a shaft centre pin.
[0056] In an embodiment, the mechanism assembly can include an upper link, a trip plate, a latch bracket, a knob, a fork, and a main spring.
[0057] In an embodiment, when the circuit breaker gets trip command the trip plate stars rotating in a clockwise direction, and once the trip plate gets fully rotated the latch bracket also start rotating in the clockwise direction by virtue of forces exerted on the latch link by means of backpressure of the contact assembly and the main spring force.
[0058] FIGs. 1A to 1D illustrate exemplary side view representations of a circuit breaker with a contact assembly in flipped condition, in closed condition, in OFF condition, and in tripped condition, respectively, in accordance of embodiment of the present disclosure. As shown the circuit breaker (also referred to as molded case circuit breaker hereinafter) can include a contact resetting assembly (also referred to as booster mechanism hereinafter) 1, a mechanism assembly 2, and a contact assembly 3. In an embodiment, the contact resetting assembly 1 can include a fixed link 1A, a slider link 1B, a pair of compression springs 1C, a pair of rivets/slider pins 1D, a cylinder pin 1E, and a guide pin 1F (clearly shown in FIG. 2B).
[0059] In an embodiment, the mechanism assembly 2 can include a latch link 2A, an upper link 2B, a trip plate 2C, a latch bracket 2D, a knob 2E, a fork 2F, a main spring 2G, and a resetting pin 2J.
[0060] In an embodiment, the contact assembly 3 can include a cassette 3A, a moving contact 2B, a shaft assembly 3C, a compression spring 3D, a shaft centre pin 3E, and mounting pins 3F. In an embodiment, the moving contact 2B gets deflected to a flipped position from a normal position when the circuit breaker gets trip command.
[0061] In an embodiment, the contact resetting assembly 1 is mounted on the contact assembly 3. In an embodiment, the fixed link 1A is mounted on a cassette 3A of the contact assembly 3 with assistance of the mounting pins 3F. The slider link/rotating link 1B is configured to move/slide between a first position and a second position relative to the fixed link 1A.
[0062] In an embodiment, the pair of compression springs 1C are guided by the cylinder pin 1E and the guide pin 1F configured between the fixed link 1A and slider link 1B. The cylinder pin 1E and the guide pin 1F are rebated to the fixed link 1A.
[0063] In an embodiment, the pair of compression springs 1C are configured to enable movement of the slider link 1B between the first position and the second position when the compression springs 1C get loaded and unloaded, respectively, (clearly shown in FIG. 2A and 2B).
[0064] In an embodiment, the rivets 1D are coupled to the fixed link 1A. The rivets 1D are slidably configured with a pair of slots of the slider link 1B to allow sliding of the slider link between the first position and the second position. In an embodiment, the slider link 1B slides in upward and downward direction along axis of the compression springs when the compression springs 1C gets loaded and unloaded, respectively.
[0065] In an embodiment, as shown in FIG. 1A, the contact assembly along with the mechanism assembly are in flipped condition after short-circuit due to high current. Due to high current the magnetic forces repels the moving contacts 3B pivoted by pin 3E (as clearly shown in FIGs. 4A and 4B). A clear difference between the flipped and normal condition can be observed. The compression spring 3D gets flipped through the dead center.
[0066] In an embodiment, as shown in FIG. 1B, the moving contacts 3B is in closed condition hence the backpressure is generated in the latch link 2A in upward direction through a combination of links. The latch link 2A exerts force on latch bracket 2D in clockwise direction ultimately transferring the forces to trip plate 2C in closed condition. There is also an upward force on the latch link 2A due to main spring assembly 2G which is mounted on the upper link 2B and which is pivoted to the latch link 2A. In this position the compression springs 1C of contact resetting mechanism 1 is in loaded condition due to resetting pin 2J.
[0067] In an embodiment, the pair of compression springs 1C are operatively coupled to the resetting pin 2J that is coupled to the latch link 2A of the mechanism assembly 2. The latch link is operatively coupled to the moving contact 3B of the contact assembly 3 such that unloading of the pair of compression spring exert an upward force on the latch link 2A to enable movement of the moving contact 2B of the contact assembly 3 form the flipped position to the normal position for contact resetting of the contact assembly.
[0068] In an embodiment, loading of the pair of compression springs IC can be occurred when the slider link 1B gets suppressed in downward direction by the resetting pin 2J when the breaker is reset in reset position from trip position as shown in FIG.1C. There resetting pin 2J is pushed downwards by the fork 2F. In this loading condition the compression springs 1C gets compressed and restore the energy.
[0069] In an embodiment, unloading of the pair of pair of compression springs 1C can be occurred when a trip command is given to the trip plate 2C. The trip plate 2C starts rotating in clockwise direction and releases the latch bracket 2D such that the latch bracket 2D also starts moving in clockwise direction. Hence the latch link 2A is released in upward direction as shown in FIG. 1D. The latch link 2A moves in upward direction due to force release by compression springs 1C which are compressed in loading condition.
[0070] In an embodiment, when the TRIP command is issued by means of any accessories to the circuit breaker, the trip plate 2C which is part of mechanism assembly 2 starts rotating in clockwise direction. Once the plate 2C is fully moved the latch bracket 2D also starts rotating in similar direction by the virtue of the forces exerted on the latch link 2A by means of backpressure of contact assembly and the main spring force. In embodiment, when the tripping action is taking place the contact resetting assembly 1 also exert an upward force to the latch link 2A so that the moving contacts 3B of contact system gets restore its normal position.
[0071] In an embodiment, as shown in FIG. 1D, the contact assembly 3 along with mechanism assembly 2 are in tripped condition. Once the mechanism assembly is tripped, the mechanism assembly can be again reset by rotating the fork 2F in clockwise direction by applying forces through the knob 2E. Once the mechanism assembly 2 is reset the circuit breaker comes to OFF position as shown in FIG. 1C, and now the breaker is ready for the next operation. By comparing FIG.1A and FIG.1B it is clear that the contact assembly which is used as a part of the mechanism assembly 2 is exerting an extra force on the latch link 2A making the trip operation more efficiently. The contact resetting assembly 1 is giving an extra push during trip condition to clear fault like short circuit.
[0072] FIGs. 2A and 2B illustrate exemplary isometric view representations of a contact resetting assembly of a circuit breaker in loaded and unloaded condition, respectively, in accordance of embodiment of the present disclosure.
[0073] FIG. 3 illustrates an exemplary exploded view representation of the proposed contact resetting assembly of a circuit breaker, in accordance of embodiment of the present disclosure.
[0074] FIGs. 4A and 4B illustrate exemplary side view representations of a contact assembly of a circuit breaker in flipped condition and normal condition, respectively, in accordance of embodiment of the present disclosure. As shown, a clear difference between the flipped and normal condition of the contact assembly 3 can be observed. The compression spring 3D gets flipped through the dead center.
[0075] FIG. 5 illustrates an exemplary representation of a circuit breaker with a contact resetting assembly, in accordance of embodiment of the present disclosure.
[0076] Without departing from the spirit and concept of the present invention, any variations and modifications to the embodiments should be within the apprehension of those with ordinary knowledge and skills in the art, and therefore fall in the scope of the present invention which is defined by the accompanied claims. Though the present invention has been described on the basis of some preferred embodiments, those skilled in the art should appreciate that those embodiments should by no means limit the scope of the present invention. Without departing from the spirit and concept of the present invention, any variations and modifications to the embodiments should be within the apprehension of those with ordinary knowledge and skills in the art, and therefore fall in the scope of the present invention which is defined by the accompanied claims.
[0077] Only certain features of the invention have been specifically illustrated and described herein, and many modifications and changes will occur to those skilled in the art. The invention is not restricted by the preferred embodiment described herein in the description. It is to be noted that the invention is explained by way of exemplary embodiment and is neither exhaustive nor limiting. Certain aspects of the invention that not been elaborated herein in the description are well understood by one skilled in the art. Also, the terms relating to singular form used herein in the description also include its plurality and vice versa, wherever applicable. Any relevant modification or variation, which is not described specifically in the specification are in fact to be construed of being well within the scope of the invention. The appended claims are intended to cover all such modifications and changes which fall within the spirit of the invention.
[0078] 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.
[0079] 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 refer 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.
[0080] 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.
[0081] 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.
[0082] 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.
[0083] 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.
[0084] 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.
[0085] 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
[0086] The present disclosure provides an improved circuit breaker.
[0087] The present disclosure provides a simple and cost effective contact resetting assembly for contact resetting of a contact assembly of a circuit breaker.
[0088] The present disclosure provides compression springs based booster mechanism for contact resetting of a contact assembly of a circuit breaker when the contacts get flipped due to short circuit.
[0089] The present disclosure provides a contact resetting assembly for a circuit breaker for contact resetting of a contact assembly of the circuit breaker to make the circuit breaker more efficient.