Claims:1. A safety system for a withdrawable circuit breaker, the system comprising;
at least one moving plate positioned on a fixed unit of a withdrawable circuit breaker, the fixed unit comprising one or more electrical components associated with the withdrawable circuit breaker, wherein each the at least one moving plate comprises:
at least one first engaging means; and
one or more first holes adapted to allow movement of one or more plugs of a detachable unit of the withdrawable circuit breaker through the at least one moving plate;
at least one fixed plate configured over the at least one moving plate and coupled to the fixed unit, the at least one fixed plate comprising one or more second holes adapted to allow movement of the one or more plugs through the fixed plate; and
one or more actuating means coupled to the detachable unit and comprising at least one second engaging means adapted to engage with the at least one first engaging means when the detachable unit is attached to the fixed unit;
wherein the engagement of the at least one first engaging means with the at least one second engaging means enables movement of the at least one moving plate to a first position along the at least one fixed plate such the one or more first holes are in line with the one or more second holes and allows the one or more plugs to engage with one or more power contacts of the withdrawable circuit breaker; and
wherein the disengagement of the at least one first engaging means from the at least one second engaging means enables movement of the at least one moving plate to a second position along the at least one fixed plate such that the one or more second holes are closed and the one or more electrical components are inaccessible.
2. The system as claimed in claim 1, wherein the at least one moving plate is coupled to a housing of the fixed unit by one or more spring such that the one or more springs enables the at least one moving plate to move to the second position when the detachable unit is detached from the fixed unit.
3. The system as claimed in claim 2, wherein the housing of the fixed unit comprises one or more slots to accommodate the one or more springs.
4. The system as claimed in claim 1, wherein the at least one first engaging means is a first cam positioned at edges of the at least one moving plate, and the at least one second engaging means is a second cam.
5. The system as claimed in claim 1, wherein the at least one fixed plate is configured to cover an open side of the fixed unit, and wherein the open side corresponds to a side to which the detachable unit is attached.
6. The system as claimed in claim 1, wherein a housing of the fixed unit comprises one or more protrusions to accommodate the at least one moving plate and the fixed plate.
7. The system as claimed in claim 6, wherein the at least one moving plate comprises one or more third holes to guide and position the at least one moving plate on the one or more protrusions of the housing of the fixed unit.
8. The system as claimed in claim 6, wherein the at least one fixed plate comprises one or more fourth holes to guide and position the at least one fixed plate on the one or more protrusions of the housing of the fixed unit.
9. The system as claimed in claim 1, wherein the one or more electrical components comprising any or a combination of main power supply line, auxiliary power supply line, bus, and the one or more power contacts.
10. The system as claimed in claim 1, wherein the withdrawable circuit breaker is selected from a group comprising a molded case circuit breaker (MCCB), and an air circuit breaker (ACB).
, Description:TECHNICAL FIELD
[0001] The present disclosure relates to the field of circuit breaker protection system. More particularly, the present disclosure relates to a safety system for electrical components and power contacts 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] Circuit breakers are incorporated in electric power system to break a circuit to protect the electric power system and circuit in event of a dangerous situation such as a short circuit, an over current, and the like, and it is designed by utilizing breaking, insulating and arc-extinguishing mechanisms.
[0004] In general, circuit breakers are categorized into a withdrawable type circuit breaker and a fixed type circuit breaker. Fixed type circuit breakers consist only of a main body, which is fixed to a switch panel. The main body of the fixed type circuit breakers incorporates all the electrical components of the circuit breaker along with the power contacts connected to the main power supply.
[0005] Withdrawable type circuit breakers include a fixed body having the power contacts and power supply connections, and a detachable main body having the release mechanism and plugs to connect with the power contacts. The main body is configured to be attached to the fixed body such that power contacts and plugs comes into electrical contact, and detached from the fixed body to break an electrical connection between the power contacts and the plugs. The fixed body is configured to have an outer box known a cradle for facilitating the maintenance and repair of the circuit breaker so that a main body is retracted into or pulled out of the cradle.
[0006] One of the major drawbacks of the withdrawable type circuit breakers is the exposure of the power contacts and electrical connections when the main body is detached from the fixed body for maintenance or any other purposes. A front end of the fixed body remains open and exposed when the main body is detached from the fixed body. This opening of the fixed body exposes the electrical connection and power contacts to outside environment that causes degradation and fault in the electrical connection and power contacts.
[0007] In many scenarios, the exposed fixed body can attract fatal accidents during maintenance and other operations being performed on and near the circuit breaker. The electrical power flowing through the power contacts or the electrical connection is very high and life threatening for users working near such exposed circuit breaker.
[0008] Such exposure of users to the electrical connections and power contacts of the circuit breaker when the main body is detached from the fixed body are generally avoided by disconnecting the electrical power supply to the circuit breaker. However, this disconnection of the electrical power supply significantly affects the performance and operation of the circuit and power system (to which the circuit breaker is installed).
[0009] European Patent Application Number EP2887473B1 discloses a safety shutter for vacuum circuit breaker. The safety shutter includes a pair of operating levers that rotates by the contact pressure received from a main body, with one end rotatably attached to lower side plates of a cradle. The safety shutter further includes a pair of shutter guides that is made of a plate material and moves vertically, with the lower end connected to the operating levers; a pair of first shutter levers and a pair of second shutter levers that are rotatably mounted on the cradle and rotate with the movement of the shutter guides; a first shutter panel and a second shutter panel that are rotatably attached to one end of the first and second shutter levers to open or close a terminal part of the circuit breaker and have panel holders on either side; and a pair of return springs that raises the shutter guides when the main body is pulled out, with the upper end fixed to part of side plates of the cradle and the lower end attached to part of the operating levers. The cited prior art incorporates a combination of link and cams to operate the shutter and in turn it rotates to open and open to provide access to terminals of the circuit breaker.
[0010] United States Patent Application Number US20090000926A1 discloses a lockable shutter for withdrawable racks of low-voltage power circuit breakers. The lockable shutter includes a plate arrangement, including at least two plates arranged in parallel and movable with respect to one another, each including at least one opening. The at least one opening in a first plate of the at least two plates being covered, in a closed state, by a second of the at least two plates, and the at least one opening in each of the two plates being located one above the other in an open state. The shutter includes movement device for movement of the at least two plates relative to one another. The movement device being blockable such that the plates of the plate arrangement cannot be moved to the open state, and the movement device including pivoting elements, each pivotable about an axis parallel to the plates, to engage in one another in a blocking state, and thus block the movement device.
[0011] Further, United States Patent Application Number US8333600B2 discloses a shutter assembly for an electrical system. The electrical system being structured to include at least one withdrawable electrical apparatus and a number of electrical bus members, at least some of the number of electrical bus members each being structured to include a primary contact, the withdrawable electric apparatus being structured to include a number of protruding structures. The withdrawable electric apparatus being structured to be coupled with a corresponding primary contact to electrically connect together the at least one withdrawable electric apparatus and the electrical bus members. The shutter assembly includes a support apparatus structured to be situated adjacent at least a portion of a primary contact of a bus member of the number of bus members; and a cover apparatus comprising an electrically insulative first cover member disposed at a first end of the support apparatus and an electrically insulative second cover member disposed at a second end of the support apparatus, the first and second cover members being movable between a first position and a second position. In the first position at least a portion of the first and second cover members extending generally toward one another from the first and second ends of the support apparatus and being structured to overlie at least a portion of the primary contact. Further, in the second position at least a portion of the first and second cover members being structured to extend from the first and second ends of the support apparatus in a direction generally toward the primary contact. The cited prior art includes two simple plates which are hinged on both side like a double door concept which plates are overlapped on above other.
[0012] The above cited prior art documents incorporate shutter type opening mechanism for circuit breakers to protect user from accidental exposure to electrical connections and power contacts of the circuit breaker. However, such shutter type opening mechanism makes the circuit breaker prone to actuation by users, as the front face of the circuit breakers becomes accessible to users, thereby leading to exposure of the electrical connection and power contacts to outside environment that causes degradation and fault in the electrical connection and power contacts and in worst cases causing fatal accidents during maintenance and other operations being performed on and near the circuit breaker.
[0013] There is, therefore, a need to provide an automatic and reliable safety mechanism for electrical components and power contacts in a withdrawable type circuit breaker, which restricts exposure to the electrical components and the power contacts when the main body is detached from the fixed body of the withdrawable type circuit breaker.

OBJECTS OF THE PRESENT DISCLOSURE
[0014] Some of the objects of the present disclosure, which at least one embodiment herein satisfies are as listed herein below.
[0015] It is an object of the present disclosure to provide a safety system for electrical components and power contacts in a withdrawable circuit breaker.
[0016] It is an object of the present disclosure to provide a safety system for electrical components and power contacts in a withdrawable circuit breaker, which prevents exposure of the power contacts and the electrical components to outside environment.
[0017] It is an object of the present disclosure to provide a safety system for power contacts in a withdrawable circuit breaker, which prevents exposure of personnel from the power contacts and the electrical components.
[0018] It is an object of the present disclosure to provide a safety system for power contacts in a withdrawable circuit breaker, which covers the power contacts of a fixed body of the circuit breaker when a main body of the circuit breaker is detached from the fixed body.
[0019] It is an object of the present disclosure to provide a safety system for power contacts in a withdrawable circuit breaker, which facilitates connection of plugs of the main body to the power contacts when the main body is attached to the fixed body.
[0020] It is an object of the present disclosure to provide a safety system for power contacts in a withdrawable circuit breaker, which automatically covers the power contacts and the other electrical components of the fixed body of the circuit breaker once the main body of the circuit breaker is detached from the fixed body.

SUMMARY
[0021] The present disclosure relates to the field of circuit breaker protection system. More particularly, the present disclosure relates to a safety system for electrical components and power contacts in a withdrawable circuit breaker.
[0022] An aspect of the present disclosure pertains to a safety system for a withdrawable circuit breaker, the system comprising: at least one moving plate positioned on a fixed unit of a withdrawable circuit breaker, the fixed unit may comprise one or more electrical components associated with the withdrawable circuit breaker, wherein each the at least one moving plate may comprise: at least one first engaging means; and one or more first holes adapted to allow movement of one or more plugs of a detachable unit of the withdrawable circuit breaker through the at least one moving plate; at least one fixed plate configured over the at least one moving plate and coupled to the fixed unit, the at least one fixed plate comprising one or more second holes adapted to allow movement of the one or more plugs through the fixed plate; and one or more actuating means coupled to the detachable unit of the withdrawable circuit breaker and may comprising at least one second engaging means adapted to engage with the at least one first engaging means when the detachable unit is attached to the fixed unit; wherein the engagement of the at least one first engaging means with the at least one second engaging means may enable movement of the at least one moving plate to a first position along the at least one fixed plate such the one or more first holes may be in line with the one or more second holes and may allow the one or more plugs to engage with one or more power contacts of the withdrawable circuit breaker; and wherein the disengagement of the at least one first engaging means from the at least one second engaging means may enable movement of the at least one moving plate to a second position along the at least one fixed plate such that the one or more second holes may be closed and the one or more electrical components may be inaccessible
[0023] In an aspect, the at least one moving plate may be coupled to a housing of the fixed unit by one or more spring such that the one or more springs may enable the at least one moving plate to move to the second position when the detachable unit is detached from the fixed unit.
[0024] In an aspect, the housing of the fixed unit may comprise one or more slots to accommodate the one or more springs.
[0025] In an aspect, the at least one first engaging means may be a first cam positioned at edges of the at least one moving plate, and the at least one second engaging means may be a second cam.
[0026] In an aspect, the at least one fixed plate may be configured to cover an open side of the fixed unit, and wherein the open side may correspond to a side to which the detachable unit is attached.
[0027] In an aspect, a housing of the fixed unit may comprise one or more protrusions to accommodate the at least one moving plate and the fixed plate.
[0028] In an aspect, the at least one moving plate may comprise one or more third holes to guide and position the at least one moving plate on the one or more protrusions of the housing of the fixed unit.
[0029] In an aspect, the at least one fixed plate may comprise one or more fourth holes to guide and position the at least one fixed plate on the one or more protrusions of the housing of the fixed unit.
[0030] In an aspect, the one or more electrical components comprising any or a combination of main power supply line, auxiliary power supply line, bus, and the one or more power contacts.
[0031] In an aspect, the withdrawable circuit breaker may be selected from a group comprising a molded case circuit breaker (MCCB), and an air circuit breaker (ACB).

BRIEF DESCRIPTION OF THE DRAWINGS
[0032] 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.
[0033] In the figures, similar components and/or features may have the same reference label. Further, various components of the same type may be distinguished by following the reference label with a second label that distinguishes among the similar components. If only the first reference label is used in the specification, the description is applicable to any one of the similar components having the same first reference label irrespective of the second reference label.
[0034] FIG. 1 illustrates a front view of a fixed unit of a withdrawable circuit breaker of the proposed system when a detachable unit is detached from the fixed unit, in accordance with an exemplary embodiment of the present disclosure.
[0035] FIG. 2 illustrates an isometric view of a detachable unit of the withdrawable circuit breaker of the proposed system, in accordance with an exemplary embodiment of the present disclosure.
[0036] FIG. 3 illustrates a cross-sectional view of the withdrawable circuit breaker of the proposed system when the detachable unit is attached to the fixed unit, in accordance with an exemplary embodiment of the present disclosure.
[0037] FIG. 4 illustrates an isometric view of the fixed unit of the withdrawable circuit breaker of the proposed system, in accordance with an exemplary embodiment of the present disclosure.
[0038] FIG. 5 illustrates an exploded view of the fixed unit of the withdrawable circuit breaker of the proposed system, in accordance with an exemplary embodiment of the present disclosure.
[0039] FIG. 6 illustrates an exemplary illustration of a fixed plate of the proposed system, in accordance with an exemplary embodiment of the present disclosure.
[0040] FIG. 7 illustrates an exemplary illustration of a moving plate of the proposed system, in accordance with an exemplary embodiment of the present disclosure.
[0041] FIG. 8 illustrates an exemplary illustration of an actuating means of the proposed system, in accordance with an exemplary embodiment of the present disclosure.

DETAILED DESCRIPTION
[0042] 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 spirit and scope of the present disclosure as defined by the appended claims.
[0043] 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.
[0044] 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.
[0045] 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.
[0046] 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.
[0047] In the specification, reference may be made to the spatial relationships between various components and to the spatial orientation of various aspects of components as the devices are depicted in the attached drawings. However, as will be recognized by those skilled in the art after a complete reading of the present application, the devices, members, devices, etc. described herein may be positioned in any desired orientation. Thus, the use of terms such as “above,” “below,” “upper,” “lower,” or other like terms to describe a spatial relationship between various components or to describe the spatial orientation of aspects of such components should be understood to describe a relative relationship between the components or a spatial orientation of aspects of such components, respectively, as the device described herein may be oriented in any desired direction.
[0048] The present disclosure relates to the field of circuit breaker protection system. More particularly, the present disclosure relates to a safety system for electrical components and power contacts in a withdrawable circuit breaker.
[0049] According to an aspect, the present disclosure elaborates upon a safety system for a withdrawable circuit breaker, the system including: at least one moving plate positioned on a fixed unit of a withdrawable circuit breaker, the fixed unit can include one or more electrical components associated with the withdrawable circuit breaker, wherein each the at least one moving plate can include: at least one first engaging means; and one or more first holes adapted to allow movement of one or more plugs of a detachable unit of the withdrawable circuit breaker through the at least one moving plate; at least one fixed plate configured over the at least one moving plate and coupled to the fixed unit, the at least one fixed plate including one or more second holes adapted to allow movement of the one or more plugs through the fixed plate; and one or more actuating means coupled to the detachable unit of the withdrawable circuit breaker and can include at least one second engaging means adapted to engage with the at least one first engaging means when the detachable unit is attached to the fixed unit; wherein the engagement of the at least one first engaging means with the at least one second engaging means can enable movement of the at least one moving plate to a first position along the at least one fixed plate such the one or more first holes can be in line with the one or more second holes and can allow the one or more plugs to engage with one or more power contacts of the withdrawable circuit breaker; and wherein the disengagement of the at least one first engaging means from the at least one second engaging means can enable movement of the at least one moving plate to a second position along the at least one fixed plate such that the one or more second holes can be closed and the one or more electrical components can be inaccessible
[0050] In an embodiment, the at least one moving plate can be coupled to a housing of the fixed unit by one or more spring such that the one or more springs can enable the at least one moving plate to move to the second position when the detachable unit is detached from the fixed unit.
[0051] In an embodiment, the housing of the fixed unit can include one or more slots to accommodate the one or more springs.
[0052] In an embodiment, the at least one first engaging means can be a first cam positioned at edges of the at least one moving plate, and the at least one second engaging means can be a second cam.
[0053] In an embodiment, the at least one fixed plate can be configured to cover an open side of the fixed unit, and the open side can correspond to a side to which the detachable unit is attached.
[0054] In an embodiment, a housing of the fixed unit can include one or more protrusions to accommodate the at least one moving plate and the fixed plate.
[0055] In an embodiment, the at least one moving plate can include one or more third holes to guide and position the at least one moving plate on the one or more protrusions of the housing of the fixed unit.
[0056] In an embodiment, the at least one fixed plate can include one or more fourth holes to guide and position the at least one fixed plate on the one or more protrusions of the housing of the fixed unit.
[0057] In an embodiment, the one or more electrical components including any or a combination of main power supply line, auxiliary power supply line, bus, and the one or more power contacts.
[0058] In an embodiment, the withdrawable circuit breaker can be selected from a group including a molded case circuit breaker (MCCB), and an air circuit breaker (ACB).
[0059] FIG. 1 illustrates a front view of a fixed unit of a withdrawable circuit breaker of the proposed system when a detachable unit is detached from the fixed unit, in accordance with an exemplary embodiment of the present disclosure.
[0060] As illustrated, in an aspect, a fixed unit 100 (also referred to as cradle 100, herein) of a withdrawable circuit breaker (also referred to as circuit breaker, herein) can include a housing 102 (also referred to as main frame 102, herein) to accommodate at least one moving plate 104-1 and 104-2 (collectively referred to as moving plates 104, herein) at an opening of the housing 102. The fixed unit 100 can include electrical components that can be any or a combination of power contacts, main power supply lines, auxiliary power supply lines, and bus, but not limited to the likes. The moving plates 104 can be positioned and held on the fixed unit 100 by positioning and fixing at least one fixed plate 106-1 to 106-2 (also referred to as fixed plates 106, herein) over the moving plates 104, and securing the fixed plates 106 to the housing 102. The moving plates 104 can be configured to slide or move along a surface of the fixed plate 106.
[0061] In an embodiment, the moving plates 104 and the fixed plates 106 can be provided with holes having size as that of plugs of the circuit breaker. The moving plates 104 can be provided with at least one first engaging means 108-1 to 108-2 (collectively referred to as first engaging means 108, herein) at edges of the moving plates. The detachment of a detachable unit from the fixed unit 100 can enable movement of the moving plates 104 along the fixed plates 106 to a closed (second) position such that the holes of the moving plates 104 are closed by the fixed plates 106and the electrical components including the power components are secured and inaccessible from outside.
[0062] In an embodiment, the attachment of the detachable unit to the fixed unit 100 can actuate the first engaging means 104 to enable movement of the moving plates 104 along the fixed plates 106 to an open (first position) position such that the holes of the moving plates 104 are in line with the holes of the fixed plates 106 to allow movement of plugs 202 of the detachable unit 200 through the moving plates 104 and the fixed plates 106 to connect them with the power contacts.
[0063] Referring to section A of FIG 1, the holes of the moving plate 104 are not in line with the holes of the fixed plates 106 when the moving plate 104 is in second position. This can enable closing of the openings of the fixed unit 100, thereby securing and making the power contacts inaccessible form outside.
[0064] In an embodiment, the system can include springs configured to the moving plates 104 such that moving plates 104 can automatically return to the second (closed) position once the detachable unit 200 is detached from the fixed unit 100, thereby securing and making the power contacts inaccessible form outside.
[0065] FIG. 2 illustrates an isometric view of a detachable unit of the withdrawable circuit breaker of the proposed system, in accordance with an exemplary embodiment of the present disclosure.
[0066] As illustrated, in an embodiment, the detachable unit 200 of the proposed system can include one or more plugs 202 (also referred to as plugs 202, herein). The plugs 202 can be connectors for electrically coupling the circuit breaker to the power contacts and main power supply. The holes of the moving plates 104 and the fixed plates 106 can be cut in shape of the plugs 202 such that the plugs can pass through the holes without leaving any gap.
[0067] In an embodiment, the detachable unit 200 can include one or more actuating means 204 (also referred to as actuating means, 204 herein) positioned at suitable positions on the detachable unit 200. The actuating means 204 can include at least one second engaging means (also referred to as second engaging means) adapted to engage with the first engaging means 108 of the moving plates 104.
[0068] In an embodiment, the attachment of the detachable unit 200 to the fixed unit 100 can enable the engagement of the second engaging means of the actuating means with the first engaging means of the moving plates 104 to enable movement of the moving plates 104 along the fixed plates 106 to the open (first position) position such that the holes of the moving plates 104 are in line with the holes of the fixed plates 106 to allow movement of plugs 202 of the detachable unit 200 through the moving plates 104 and the fixed plates 106 to connect them with the power contacts.
[0069] In another embodiment, the detachment of the detachable unit 200 from the fixed unit 100 can enable disengagement of the second engaging means of the actuating means 202 with the first engaging means 108 of the moving plates 104 to enable movement of the moving plates 104 along the fixed plates 106 to the closed (second) position such that the holes of the moving plates 104 are closed by the fixed plates 106 and the electrical components including the power components are secured and inaccessible from outside.
[0070] In an exemplary embodiment, the detachable unit 200 can include a second frame 206 to facilitate attachment of the detachable unit 200 to the housing or main frame of the fixed unit 100.
[0071] FIG. 3 illustrates a cross-sectional view of the withdrawable circuit breaker of the proposed system when the detachable unit 200 is attached to the fixed unit 100, in accordance with an exemplary embodiment of the present disclosure.
[0072] As illustrated, in an embodiment, the attachment of the detachable unit 200 to the fixed unit 100 can enable the engagement of the second engaging means of the actuating means 204 with the first engaging means of the moving plates 104 to enable movement of the moving plates 104 along the fixed plates 106 to the open (first position) position such that the holes of the moving plates 104 are in line with the holes of the fixed plates 106 to allow movement of plugs 202 of the detachable unit 200 through the moving plate and the fixed plates 106 to connect them with the power contacts 302.
[0073] In an exemplary embodiment, the first engaging means can be a first cam, but not limited to the likes. The positioning of the moving plates 104 over each other can combine each first cams to form an entry cam. The second engaging means of the actuating means 204 can be a second cam. The attachment of the detachable unit 200 to the fixed unit 100 can enable the engagement of the second cam of the actuating means with the cam way of the moving plates 104 to enable movement of the moving plates 104 along the fixed plates 106 to the open (first position) position such that the holes of the moving plates 104 are in line with the holes of the fixed plates 106 to allow movement of plugs of the detachable unit 200 through the moving plate and the fixed plates 106 to connect them with the power contacts.
[0074] FIG. 4 illustrates an isometric view of the fixed unit of the withdrawable circuit breaker of the proposed system, in accordance with an exemplary embodiment of the present disclosure.
[0075] As illustrated, in an embodiment, the fixed unit 100 of the circuit breaker can be provided with one or more slots 404-1 to 404-4 (collectively referred to as slots 404, herein) positioned at suitable positions on the detachable unit 200. The slots 400 can be configured to accommodate one or more springs 402-1 to 402-4 (collectively referred to as springs 402, herein).
[0076] In an embodiment, the springs 402 and the slots 404 can be configured in proximity to the moving plates 104 and configured with the moving plates 104 such that the springs 402 can enable the moving plates 104 to automatically return to the second (closed) position once the detachable unit 200 is detached from the fixed unit 100, thereby securing and making the power contacts 302 inaccessible form outside. The springs 4023 can be configured to deform or compress when the moving plates 104 moves to the first position upon attachment of the detachable unit 200 to the fixed unit 100, and further configured to release the energy and bring the moving plates 104 to the second position.
[0077] In an embodiment, the attachment of the detachable unit 200 to the fixed unit 100 can enable the engagement of the second engaging means of the actuating means with the first engaging means of the moving plates 104 to enable movement of the moving plates 104 along the fixed plates 106 to the open (first position) position against the compressive force of the springs.
[0078] FIG. 5 illustrates an exploded view of the fixed unit of the withdrawable circuit breaker of the proposed system, in accordance with an exemplary embodiment of the present disclosure.
[0079] As illustrated, in an embodiment, the fixed unit 100 can be provided with a plurality of protrusions 502-1 to 502-4 (collectively referred to as protrusions 502, herein) positioned at predefined positions on the fixed unit 100. The protrusions 502 can facilitate guiding a user in positioning the moving plates 104 and the fixed plates 106 over the fixed unit 100. In an embodiment, the moving plates 104 and the fixed plates 106 can be secured to the fixed unit 100 using a plurality of screw or pins 504 (collectively referred to as screws/pins 504, herein).
[0080] In an embodiment, the moving plates 104 and the fixed plates 106 can be provided with another set of holes to allow the screws/pins 504 to pass through the moving plates 104 and the fixed plate 106, and secure the screws/pins 504 at the corresponding protrusions 502, thereby securing the moving plates 104 and the fixed plates 106 to the fixed unit 100.
[0081] FIG. 6 illustrates an exemplary illustration of a fixed plate of the proposed system, in accordance with an exemplary embodiment of the present disclosure.
[0082] As illustrated, in an embodiment, the fixed plate 106 of the proposed system can include one or more second holes 602-1 to 602-4 (collectively referred to as second holes 602, herein) of a suitable size as that of the plugs 202 such that the plugs 202 can easily pass through the fixed plate 106.
[0083] In another embodiment, the fixed plate 106 can be provided with one or more fourth holes 604-1 to 604-4 (collectively referred to as fourth holes 604, herein) of a suitable size such that the screws/pins 504 can easily pass through the fixed plate 106 and can be secured to the protrusions 502 of the fixed unit 100.
[0084] FIG. 7 illustrates an exemplary illustration of a moving plate of the proposed system, in accordance with an exemplary embodiment of the present disclosure.
[0085] FIG. 8 illustrates an exemplary illustration of an actuating means of the proposed system, in accordance with an exemplary embodiment of the present disclosure.
[0086] Referring to FIG.7, in an embodiment, the moving plate 104 of the proposed system can include one or more first holes 702-1 to 702-4 (collectively referred to as first holes 702, herein) of a suitable size as that of the plugs 202 such that the plugs 202 can easily pass through the moving plate 104.
[0087] In an embodiment, the moving plate 104 can include one or more first cams 704-1 to 704-4 (collectively referred to as first cam 704, herein) as the at least one first engaging means, positioned at the edges of the moving plate 104.
[0088] In an embodiment, the moving plate 104 can be provided with one or more third holes 706-1 to 706-4 (collectively referred to as third holes 706, herein) of a suitable size such that the screws/pins 504 can easily pass through the moving plate 104 and can be secured to the protrusions 502 of the fixed unit 100. Further, the size of the third holes 706 can be sufficient to allow the moving plates 104 to move between the first position and the second position even after securing the moving plate 104 to the fixed unit 100 by the screws/pins.
[0089] Referring to FIG. 8, in an embodiment, the actuating means 204 of the proposed system can include one or more second cams 802-1 to 802-2 (collectively referred to as second cams 802, herein) as the at least one second engaging means of the actuating means 204 of the system.
[0090] In an embodiment, the attachment of the detachable unit 200 to the fixed unit 100 can enable the engagement of the second cams 802 of the actuating means 204 with the first cam 704 of the moving plates 104 to enable movement of the moving plates 104 along the fixed plates 106 to the open (first position) position such that the first holes 702 of the moving plates 104 are in line with the second holes 602 of the fixed plates 106 to allow movement of plugs 202 of the detachable unit 200 through the moving plate 104 and the fixed plates 106 to connect them with the power contacts 302.
[0091] 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.
ADVANTAGS OF THE INVENTION
[0092] The present disclosure providesa safety system for power contacts in a withdrawable circuit breaker.
[0093] The present disclosure provides a safety system for power contacts in a withdrawable circuit breaker, which prevents exposure of the power contacts to outside environment.
[0094] The present disclosure provides a safety system for power contacts in a withdrawable circuit breaker, which prevents exposure of personnel from the power contacts.
[0095] The present disclosure provides a safety system for power contacts in a withdrawable circuit breaker, which covers the power contacts of a fixed body of the circuit breaker when a main body of the circuit breaker is detached from the fixed body.
[0096] The present disclosure provides a safety system for power contacts in a withdrawable circuit breaker, which facilitates connection of plugs of the main body to the power contacts when the main body is attached to the fixed body.
[0097] The present disclosure provides a safety system for power contacts in a withdrawable circuit breaker, which automatically covers the power contacts of the fixed body of the circuit breaker once the main body of the circuit breaker is detached from the fixed body.