Claims:1. A racking mechanism (100) for a circuit breaker (120), the racking mechanism (100) comprising:
a cradle (102) having one or more slots (108);
a first member (104), having one or more legs (106) corresponding to the one or more slots (108), configured on a first side of the cradle (102), wherein the first member (104) is slidably configured to move in a first direction such that on moving the first member (104), the one or more legs (106) are configured to be passed through the one or more slots (108);
a locking assembly (110) configured on a second side, opposite to the first side, of the cradle (102) and first member (104), wherein the locking assembly (110) is configured with the first member (104) such that when the one or more legs (106) are passed through the one or more slots (108), the locking assembly (110) is moved by the one or more legs (106) from a first position to a second position, wherein the locking assembly (110) is engaged with the cradle (102) when the locking assembly (110) is at the first position, and the locking assembly (110) is disengaged with the cradle (102) when the locking assembly (110) is at the second position;
a lead screw assembly (112), on the second side, operatively configured with the locking assembly (110), wherein the lead screw mechanism (112) is operatively engaged with the locking assembly (110) when the locking assembly (110) is at the first position such that rotational motion of the lead screw mechanism (112) facilitates a translational motion of the cradle (102), in a second direction, through the locking assembly (110) for facilitating racking of the cradle (102).
2. The racking mechanism (100) as claimed in claim 1, wherein the racking mechanism (100) comprised a locking member (114) movably configured with the cradle (102) and configured to lock the locking assembly (110) at the first position.
3. The racking mechanism (100) as claimed in claim 2, wherein the locking member (114) is operatively configured with the first member (104) such that when the one or more legs (106) are passed through the one or more slots (108), the one or more legs (106) are configured to move the locking member (114) from a third position to a fourth position facilitating the movement of the locking assembly (110) from the first position to the second position.
4. The racking mechanism (100) as claimed in claim 3, wherein the locking member (114) is engaged with the cradle (102) using one or more engaging members (116) configured on the second surface of the cradle (102).
5. The racking member (100) as claimed in claim 4, wherein at least one of the one or more engaging member (116) comprised a slot (126) for accommodating corresponding to a protrusion (128) of the locking member (114) for accommodating the protrusion (128) when the locking member (114) is at the third position.
6. The racking mechanism (100) as claimed in claim 5, wherein when the locking member (114) is at the third position, the protrusion (128) is accommodated by the one or more engaging members (16) such that the protrusion is allowed to slide, through the slot (126), over the locking assembly (110) restricting the movement of the locking assembly (110) to the second position.
7. The racking mechanism (100) as claimed in claim 1, wherein the first member (104) is configured on the first side of the cradle (102) through one or more first elastic members (122) facilitating retraction of the first member in a third direction opposite to the first direction.
8. The racking mechanism (100) as claimed in claim 1, wherein the locking assembly (110) is configured on the second side through one or more second elastic members (124) facilitating retraction of the locking member (110) to the first position.
9. The racking mechanism (100) as claimed in claim 1, wherein the first direction is perpendicular to the cradle (102) and the second direction is along a longitudinal axis of the cradle (102).

Description:TECHNICAL FIELD
[0001] The present disclosure relates to the field of switchgear. More particularly the present disclosure relates to a racking mechanism for circuit breaker in the switchgear.

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] Racking is the operation of sliding circuit breaker in or out of the switchgear to act as a withdrawable switch between the input and output of the switchgear. Breaker has two main configurations with regards to the electrical contacts such as close & open. In Closed configuration the breaker will conduct electricity from its input (I/P) to output (O/P), while in Open configuration the contact between input (I/P) & output (O/P) is broken ensuring no transmission. The breaker is designed to withhold the high voltage across its contacts when in open configuration. When the breaker is racked into its service position while it is in closed configuration, there is high risk of electrical fault to occur.
[0004] There is, therefore, a need of an improved racking method or mechanism for racking the circuit breakers with respect to the switchgear.

OBJECTS OF THE PRESENT DISCLOSURE
[0005] Some of the objects of the present disclosure, which at least one embodiment herein satisfies are as listed herein below.
[0006] It is an object of the present disclosure to provide a racking mechanism for circuit breaker which avoids inadvertent racking of the circuit breaker.
[0007] It is an object of the present disclosure to provide a circuit breaker for circuit breaker which is cost effective.
[0008] It is an object of the present disclosure to provide a racking mechanism for circuit breaker which is easy to use.
[0009] It is an object of the present disclosure to provide a racking mechanism for circuit breaker which requires less maintenance.

SUMMARY
[0010] The present disclosure relates to the field of switchgear. More particularly the present disclosure relates to a racking mechanism for circuit breaker in the switchgear.
[0011] An embodiment of the present disclosure pertains to a circuit breaker racking mechanism for a circuit breaker. The racking mechanism includes a cradle having one or more slots; a first member, having one or more legs corresponding to the one or more slots, configured on a first side of the cradle. The first member is slidably configured to move in a first direction such that on moving the first member, the one or more legs are configured to be passed through the one or more slots. A locking assembly configured on a second side, opposite to the first side, of the cradle and first member. The locking assembly is configured with the first member such that when the one or more legs are passed through the one or more slots, the locking assembly is moved by the one or more legs from a first position to a second position. The locking assembly is engaged with the cradle when the locking assembly is at the first position, and the locking assembly is disengaged with the cradle when the locking assembly is at the second position. A lead screw assembly, on the second side, operatively configured with the locking assembly. The lead screw mechanism is operatively engaged with the locking assembly when the locking assembly is at the first position such that rotational motion of the lead screw mechanism facilitates a translational motion of the cradle, in a second direction, through the locking assembly for facilitating racking of the cradle.
[0012] In an embodiment, the racking mechanism may comprise a locking member movably configured with the cradle and configured to lock the locking assembly at the first position. The locking member may be operatively configured with the first member such that when the one or more legs are passed through the one or more slots, the one or more legs may be configured to move the locking member from a third position to a fourth position facilitating the movement of the locking assembly from the first position to the second position. The locking member may be engaged with the cradle using one or more engaging members configured on the second surface of the cradle. At least one of the one or more engaging member may comprise a slot for accommodating corresponding to a protrusion of the locking member for accommodating the protrusion when the locking member is at the third position.
[0013] In an embodiment, when the locking member is at the third position, the protrusion may be accommodated by the one or more engaging members such that the protrusion may be allowed to slide over the locking assembly restricting the movement of the locking assembly to the second position. The first member may be configured on the first side of the cradle through one or more first elastic members facilitating retraction of the first member in a third direction opposite to the first direction. The locking assembly may be configured on the second side through one or more second elastic members facilitating retraction of the locking member to the first position. The first direction may be perpendicular to the cradle and the second direction may be along a longitudinal axis of the cradle.
[0014] Various objects, features, embodiments 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
[0015] 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.
[0016] 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.
[0017] FIG. 1 illustrates an exemplary top view of circuit breaker racking mechanism, in accordance with an embodiment of the present disclosure.
[0018] FIG. 2 illustrates an exemplary integration of racking mechanism in circuit breaker, in accordance with an embodiment of the present disclosure.
[0019] FIG. 3 illustrates an exemplary top view of circuit breaker racking mechanism having first member and locking assembly, in accordance with an embodiment of the present disclosure.
[0020] FIG. 4 illustrates an exemplary bottom view of circuit breaker racking mechanism, in accordance with an embodiment of the present disclosure.
[0021] FIG. 5A illustrates an exemplary representation of engaging members and locking assembly of circuit breaker racking mechanism, in accordance with an embodiment of the present disclosure.
[0022] FIG. 5B illustrates an exemplary representation of engaging locking assembly, engagement members, and the cradle when the locking assembly is at first position, in accordance with an embodiment of the present disclosure.

DETAILED DESCRIPTION
[0023] 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.
[0024] In the following description, numerous specific details are set forth in order to provide a thorough understanding of embodiments of the present invention. It will be apparent to one skilled in the art that embodiments of the present invention may be practiced without some of these specific details.
[0025] The present disclosure relates to the field of circuit breaker. More particularly the present disclosure relates to a racking mechanism for circuit breaker in the circuit breaker.
[0026] The present disclosure elaborates upon a racking mechanism for a circuit breaker. The racking mechanism includes a cradle having one or more slots; a first member, having one or more legs corresponding to the one or more slots, configured on a first side of the cradle. The first member is slidably configured to move in a first direction such that on moving the first member, the one or more legs are configured to be passed through the one or more slots. A locking assembly configured on a second side, opposite to the first side, of the cradle and first member. The locking assembly is configured with the first member such that when the one or more legs are passed through the one or more slots, the locking assembly is moved by the one or more legs from a first position to a second position. The locking assembly is engaged with the cradle when the locking assembly is at the first position, and the locking assembly is disengaged with the cradle when the locking assembly is at the second position. A lead screw assembly, on the second side, operatively configured with the locking assembly. The lead screw mechanism is operatively engaged with the locking assembly when the locking assembly is at the first position such that rotational motion of the lead screw mechanism facilitates a translational motion of the cradle, in a second direction, through the locking assembly for facilitating racking of the cradle.
[0027] In an embodiment, the racking mechanism can comprise a locking member movably configured with the cradle and configured to lock the locking assembly at the first position.
[0028] In an embodiment, the locking member can be operatively configured with the first member such that when the one or more legs are passed through the one or more slots, the one or more legs can be configured to move the locking member from a third position to a fourth position facilitating the movement of the locking assembly from the first position to the second position.
[0029] In an embodiment, the locking member can be engaged with the cradle using one or more engaging members configured on the second surface of the cradle.
[0030] In an embodiment, at least one of the one or more engaging member can comprise a slot for accommodating corresponding to a protrusion of the locking member for accommodating the protrusion when the locking member is at the third position.
[0031] In an embodiment, when the locking member is at the third position, the protrusion can be accommodated by the one or more engaging members such that the protrusion can be allowed to slide over the locking assembly restricting the movement of the locking assembly to the second position.
[0032] In an embodiment, the first member can be configured on the first side of the cradle through one or more first elastic members facilitating retraction of the first member in a third direction opposite to the first direction.
[0033] In an embodiment, the locking assembly can be configured on the second side through one or more second elastic members facilitating retraction of the locking member to the first position.
[0034] In an embodiment, the first direction can be perpendicular to the cradle and the second direction may be along a longitudinal axis of the cradle.
[0035] FIG. 1 illustrates an exemplary top view of circuit breaker racking mechanism, in accordance with an embodiment of the present disclosure.
[0036] FIG. 2 illustrates an exemplary integration of the racking mechanism with circuit breaker, in accordance with an embodiment of the present disclosure.
[0037] FIG. 3 illustrates an exemplary top view of circuit breaker racking mechanism having first member and locking assembly, in accordance with an embodiment of the present disclosure.
[0038] FIG. 4 illustrates an exemplary bottom view of circuit breaker racking mechanism, in accordance with an embodiment of the present disclosure.
[0039] As illustrated, a circuit breaker racking mechanism 100 for a circuit breaker 120 can include a cradle 102 having one or more slots 108. A first member 104 having one or more legs 106 corresponding to the one or more slots 108 can be configured on a first side (also referred as side A, herein) of the cradle 102. The first member 104 can be slidably configured to move in a first direction (perpendicular to the cradle 102) such that on moving the first member 104, the one or more legs 106 can be configured to be passed through the one or more slots 108. A locking assembly 110 can be configured on a second side (also referred as side B, herein), opposite to the first side, of the cradle 102. The locking assembly 110 can be operatively configured with the first member 104 and the cradle 102 such that when the one or more legs 106 are passed through the one or more slots 108, the locking assembly (110) can be moved by the one or more legs 106 from a first position to a second position.
[0040] In an embodiment, the first position can be referred to a position when the locking assembly can be proximate to the cradle 102 and is engaged with the cradle. The second position can be referred to a position when the locking assembly is away from the cradle 102 and is disengaged from the cradle. A lead screw assembly 112, can be configured on the second side, and can be operatively configured with the locking assembly 110. The lead screw mechanism 112 can be operatively engaged with the locking assembly 110 when the locking assembly 110 is at the first position such that rotational motion of the lead screw mechanism 112 can facilitate a translational motion of the cradle 102 along longitudinal axis (also referred as second direction, herein) of the cradle 102, through the locking assembly 110 for facilitating racking in or racking out of the cradle 102 from the circuit breaker 120 based on a direction of rotation of the lead screw.
[0041] In an embodiment, sliding operation of the first member 104 can be selected on the basis when to allow racking operation of the circuit breaker with respect to the switchgear. For example, when the circuit breaker 120 is in closed configuration the sliding operation of the first member can be performed manually or automatically so that the locking assembly 110 is disengaged from the cradle 102 and the lead screw assembly 112. In this case, even if we rotate the lead screw the rotation motion of the lead screw assembly 112 would not lead to translation motion, through the locking assembly 110, of the cradle 102. In another case, when the circuit breaker 120 is in open configuration, the sliding motion of the first member 104 can be restricted and the locking assembly 110 can be engaged with the lead screw assembly 112 and the cradle 102 and the rotation of the lead screw can lead to the translational movement, through the locking assembly 110 of the cradle 102.
[0042] FIG. 5A illustrates an exemplary representation of engaging members and locking assembly of circuit breaker racking mechanism, in accordance with an embodiment of the present disclosure.
[0043] FIG. 5B illustrates an exemplary representation of engaging locking assembly, engagement members, and the cradle when the locking assembly is at first position, in accordance with an embodiment of the present disclosure.
[0044] As illustrated, the racking mechanism 100 can include a locking member 114 that can be movably configured with the cradle 102. The locking member 114 can be configured to lock the locking assembly 110 at the first position. The locking member 114 can be operatively configured with the first member 104 such that when the one or more legs 106 are passed through the one or more slots 108, the one or more legs 106 can be configured to move the locking member 114 from a third position to a fourth position facilitating the movement of the locking assembly 110 from the first position to the second position. The locking assembly 110 can be engaged with the cradle 102 through one or more engaging members 116 that can be configured on the second surface of the cradle 102.
[0045] In an embodiment, the third position can be referred to a position when the locking member 114 can be slide away, along the longitudinal direction of the cradle 102, from the engaging members 116. The fourth position can be referred to a position when the locking member can be slide towards, along the longitudinal axis of the cradle, the engaging members 116. At least one of the one or more engaging members 116 can include a slot 126 for accommodating corresponding to a protrusion 128 of the locking member 114. The protrusion 128 can be accommodated by the slod when the locking member is slide at the third position. When the locking member 114 is at the third position, the protrusion 128 is accommodated by the one or more engaging members 116 such that the protrusion 128 is allowed to slide, through the slot 126, over the locking assembly 110 restricting the movement of the locking assembly 110 to the second position.
[0046] In an embodiment, the first member 104 can be configured on the first side of the cradle 102 through one or more first elastic members 122 facilitating retraction of the first member in a third direction opposite to the first direction. The one or more first elastic members 122 can include but without limiting to any or combination of spring, and bolt. The elasticity of the first elastic members can facilitate retraction of the first member 104 to an initial position such that the one or more legs 106 slides out of the one or more slots 108 when the circuit breaker 120 is in open configuration to allow racking operation of the cradle 102. The locking assembly 110 can be configured on the second side through one or more second elastic members 124 facilitating retraction of the locking member 110 to the first position. The one or more second elastic members can include but not limited to any or combination of spring, and bolt. The elastic property of the second elastic members can facilitate retraction of the locking assembly 110 to the first position when the one or more legs 106 slides out of the one or more slots 108.
[0047] Moreover, in interpreting the specification, 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.
[0048] 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
[0049] The proposed invention provides a racking mechanism for circuit breaker which avoids inadvertent racking of the circuit breaker.
[0050] The proposed invention provides a racking mechanism for circuit breaker which is cost effective.
[0051] The proposed invention provides a racking mechanism for circuit breaker which is easy to use.
[0052] The proposed invention provides a racking mechanism for circuit breaker which requires less maintenance.