TECHNICAL FIELD
[0001] The present disclosure relates, in general, to low tension (LT) panels, and more specifically, relates to an assembly of withdrawable module operated by a single handle and single multi-start racking screw with a single keyhole.

BACKGROUND
[0002] In an LT panel board, a module with a short circuit protection device, contactor, relay and the like are provided for operation, control and protection of loads like motor, pumps and the like. The module can be fixed type or withdrawable type and a racking mechanism is provided to move them from one position to another, i.e., service, test and isolate positions. The mechanism can be an open-door type or closed-door type. In the open-door type, all the operations are performed when the door is open. Hence, it affects the safety of the operator.
[0003] Currently, the closed-door design is most suitable for enhancing safety and it can be achieved within a withdrawable module by using various mechanisms. A few existing mechanisms known in the art include two key holes for test or service position which can increase the complexity of the structure and cannot perform interlocking in the existing mechanism. Further, constructional features of the existing mechanism involve a number of components that not only increases the complexities of the mechanism but also increases the manufacturing cost.
[0004] Therefore, it is desired to overcome the drawbacks, shortcomings, and limitations associated with existing solutions, and develop a simple, cost-effective, reliable and efficient module with a single multi-start racking screw for all module operations and interlocking are performed with a single handle operation with a single keyhole.

OBJECTS OF THE PRESENT DISCLOSURE
[0005] An object of the present disclosure relates, in general, to low tension (LT) panels, and more specifically, relates to an assembly of withdrawable module operated by a single handle and single multi-start racking screw with a single keyhole.
[0006] Another object of the present disclosure is to perform various interlocking and provide multi-position placement of withdrawable module with a single handle operation.
[0007] Another object of the present disclosure provides a simple, cost-effective, reliable and efficient withdrawable module.
[0008] Another object of the present disclosure is to provide a withdrawable module with simplified assembly, thereby requiring a smaller number of components.
[0009] Yet another object of the present disclosure is to provide an assembly of withdrawable module that ensures the full safety of the operator.

SUMMARY
[0010] The present disclosure relates, in general, to low tension (LT) panels, and more specifically, relates to an assembly of withdrawable module operated by a single handle and single multi-start racking screw with a single keyhole. The main objective of the present disclosure is to overcome the drawback, limitations, and shortcomings of the existing mechanism and solution, by providing an assembly of withdrawable module that is operated using a single rotating handle key, single multi-start racking screw and single key hole to move the withdrawable module from one position to another position and perform all interlocking operations at correspondent positions when power device is in OFF condition and door is in closed condition.
[0011] The present invention includes the assembly placed inside a sheet metal housing, provided for the closed-door operation of an electrical module in LT panel boards to ensure the full safety of the operator. The withdrawable module can include the panel door in a closed condition and includes a fixed partition tray. A door cut-out is provided at the door. The keyhole and multi-start racking screw are provided at the bottom plate of the withdrawable module. The keyhole is adapted to receive the rotating handle key through the door cut-out. The multi-start racking screw, upon rotation of the single rotating handle key, is adapted to move the withdrawable module from one position to another position and perform all interlocking operations at correspondent positions, i.e., isolate, test and service positions, thereby providing multi-position placement of withdrawable module with single handle operation. Further, the withdrawable module can be operated using the single rotating handle key and the single multi-start racking screw, facilitating simplified assembly, thereby requiring a smaller number of components.
[0012] Besides, the present disclosure includes an assembly that perform all operations and can be fit inside any type of sheet metal housing with a fixed width, depth and variable height up to 1200 mm, thereby avoiding a greater number of components and enabling an efficient, reliable, simple and cost-effective solution to perform interlocking operations at correspondent positions i.e., isolate, test and service positions.
[0013] Various objects, features, aspects, and advantages of the inventive subject matter will become more apparent from the following detailed description of preferred embodiments, along with the accompanying drawing figures in which like numerals represent like components.

BRIEF DESCRIPTION OF THE DRAWINGS
[0014] The following drawings form part of the present specification and are included to further illustrate aspects of the present disclosure. The disclosure may be better understood by reference to the drawings in combination with the detailed description of the specific embodiments presented herein.
[0015] FIG. 1A illustrates an exemplary view of withdrawable module inside the panel with door closed and shows keyhole, rotating handle from door cutout, in accordance with an embodiment of the present disclosure.
[0016] FIG. 1B illustrates an enlarged view of keyhole at the bottom plate of the withdrawable module to insert rotating handle key and also shows shutter is closed, in accordance with an embodiment of the present disclosure.
[0017] FIG. 1C illustrates an exemplary view of door cut-out to insert rotating handle and shutter is in open condition, in accordance with an embodiment of the present disclosure.
[0018] FIG. 1D illustrates an enlarged view of the keyhole at bottom plate of the withdrawable module and shutter is in open condition, in accordance with an embodiment of the present disclosure.

DETAILED DESCRIPTION
[0019] 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. 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.
[0020] 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.
[0021] The proposed assembly of withdrawable module disclosed in the present disclosure overcomes the drawbacks, shortcomings, and limitations associated with the conventional mechanism by providing the assembly having a single rotating handle key, single multi-start racking screw and single keyhole to move the withdrawable module from one position to another position and perform all interlocking operations at correspondent positions, i.e., isolate, test and service positions. The withdrawable module assembly provided inside a sheet metal housing provided for the closed-door operation of an electrical module in LT panel boards.
[0022] The present disclosure provides the panel door in a closed condition. A door cut-out is provided at the door. The keyhole and multi-start racking screw are provided at the bottom `plate of the withdrawable module. The keyhole is adapted to receive the rotating handle key through the door cut-out. The multi-start racking screw, upon rotation of the single rotating handle key, is adapted to move the withdrawable module from one position to another position i.e., isolate, test and service positions and perform all interlocking operations at correspondent positions, when the power device is in OFF condition and door is in closed condition. The present disclosure can be described in enabling detail in the following examples, which may represent more than one embodiment of the present disclosure.
[0023] The advantages achieved by the assembly of the withdrawable module of the present disclosure can be clear from the embodiments provided herein. The withdrawable module can be operated with the single handle and single multi-start racking screw with a single keyhole and perform various interlocking and ensures full safety of the operator. For example, the multi-start racking screw, upon rotation of the single rotating handle key, is adapted to move the withdrawable module from one position to another position, thereby providing multi-position placement of withdrawable module with single handle operation. Further, the withdrawable module can be operated using the single rotating handle key and single multi-start racking screw, facilitating simplified assembly, thereby requiring a smaller number of components. The present disclosure provides a simple, cost-effective, reliable and efficient withdrawable module. The description of terms and features related to the present disclosure shall be clear from the embodiments that are illustrated and described; however, the invention is not limited to these embodiments only. Numerous modifications, changes, variations, substitutions, and equivalents of the embodiments are possible within the scope of the present disclosure. Additionally, the invention can include other embodiments that are within the scope of the claims but are not described in detail with respect to the following description.
[0024] Referring to FIG. 1A to 1D, a withdrawable module 100 of low tension (LT) panels is disclosed. The present disclosure discloses mechanisms to provide a closed-door operation of the withdrawable module 100. The withdrawable module 100 may be a switch fuse unit (SFU), direct online (DOL), Reverse Direct OnLine starter (RDOL), Star-Delta starters, relay protection, Short Circuit Protection Device (SCPD), contactor, relay and the likes, which provided in a panel board for operation, protection and connection of loads. The withdrawable module 100 may be provided on the panel board using a sliding mechanism. The panel board may be provided with a door which is in a closed-door condition in accordance with an embodiment of the present disclosure.
[0025] The LT panel board is housed by the enclosure or housing having the withdrawable module 100 to control and protect loads such as motor, pumps and the like. The enclosure is formed from reinforced sheet metal. In an exemplary embodiment, the withdrawable module, as presented in the example can be, closed-door withdrawable module 100. The withdrawable module 100 can include a chassis and an assembly provided inside the chassis. In another exemplary embodiment, the assembly of the withdrawable module 100 can include a single keyhole 106 (also referred to as at least one keyhole 106, herein), bottom plate 108, multi-start racking screw 110 and a single rotating handle key 112 (also referred to as handle key 112, herein). The assembly can perform all the above operations and can be fit inside any type of sheet metal housing with a fixed width, depth and height that can be varied up to 1200 mm. The withdrawable module 100 is provided with static chassis and contains the multi- start racking screw 110 which can operate the module 100 at multi position, i.e., isolate, test and service positions and operate all related interlocking with the single handle 112 and the single keyhole 106.
[0026] The withdrawable module 100 can include the door panel 102 (also referred to as door 102, herein) in a closed condition and fixed partition tray 114 as shown in FIG. 1A. The fixed partition tray 114 is provided at the bottom portion of the door panel 102 to support a plurality of electrical equipment modules. The door 102 can include door cut-out 104 (also referred to as cut-out profile 104). The door cut-out 104 as presented in the embodiment is located at bottom section of door 102. As can be appreciated, the present disclosure may not be limited to this configuration but may be extended to other configurations. The keyhole 106 and multi-start racking screw 110 are provided at the bottom plate 108 of the withdrawable module. The keyhole 106 is adapted to receive the rotating handle key 112 through the door cut-out 104 and rotate the multi-start racking screw 110 from one position to another.
[0027] The proposed withdrawable module operated by the single handle can include the door panel 102 having the cut-out profile 104, the cut-out profile being spaced to form gap in the door panel. Atleast one keyhole 106 is provided at the bottom plate 108 of the cut-out profile 104, where the atleast one keyhole 106 being spaced to define an opening. Further, the multi-start racking screw 110 accommodated inside the atleast one keyhole 106, where the opening of the atleast one key hole 106 is being configured to receive the handle key 112 to couple with the multi-start racking screw 110 so as to rotate of the multi-start racking screw 110 at different positions facilitating multi-position placement of the withdrawable module with single handle operation.
[0028] Accordingly, the multi-start racking screw 110, upon rotation of the handle key 112, is adapted to move the withdrawable module 100 to different positions, where the different positions pertain to isolate, test and service positions. The multi-start racking screw 110, upon rotation of the handle key 112, is adapted to move the withdrawable module to different positions to enable and disable all interlocking operations at correspondent positions.
[0029] The handle key 112 is adapted to be inserted into the opening of the atleast one keyhole 106 to rotate the multi-start racking screw 110 from one position to another when the power device is in OFF condition. Similarly, the handle key 112 is adapted to be inserted into the opening of the atleast one keyhole 106 to rotate the multi-start racking screw 110 from one position to another when the door 102 is in closed condition. The atleast one keyhole, as presented in the example, can be of any shape, configuration and size and the handle key, as presented in the example, can be of any shape, configuration and size and couple with corresponding opening of the atleast one keyhole. The atleast one keyhole and the handle key of the present disclosure may include configurations such as round, square, oval, rectangular and the likes.
[0030] In an exemplary embodiment, the withdrawable module 100, as presented in the example, can include single keyhole 106 configured at bottom plate 108 of the withdrawable module 100. The rotating handle key 112 is adapted to be inserted inside the keyhole 106 to rotate the multi-start racking screw 110 from one position to another when the power device is in OFF condition and door 102 is in closed condition. The multi-start racking screw 110, upon rotation of the single rotating handle key 112, is adapted to move the withdrawable module 100 from one position to another position i.e., isolate, test and service positions and perform all interlocking operations at correspondent positions.
[0031] The rotating handle key 112 is shown in FIG. 1B can be inserted inside the module 100 through keyhole 106. The key hole 106 is shown at the bottom plate 108 of the withdrawable module 100 which allows the rotating handle key 112 to insert inside from door cut-out 104 as shown in FIG. 1C and perform all the rotary operations or rotate the multi-start racking screw 110 as shown in FIG. 1D from one position to another position i.e., from isolate to test position and test to service position and vice versa when power device is in OFF condition and door 102 is in the closed condition.
[0032] Accordingly, the single rotating handle key 112 can rotate the multi-start racking screw 110 and enable and disable all interlocking operations at correspondent positions, i.e., isolate, test and service positions. Thus, the present invention overcomes the drawbacks, shortcomings, and limitations associated with existing solutions, and provides a compact, cost-effective, and efficient module requiring a smaller number of components and ensures the safety of the operator.
[0033] It will be apparent to those skilled in the art that the assembly of the withdrawable module 100 of the disclosure may be provided using some or all of the mentioned features and components without departing from the scope of the present disclosure. While various embodiments of the present disclosure have been illustrated and described herein, 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 spirit and scope of the disclosure, as described in the claims.

ADVANTAGES OF THE PRESENT DISCLOSURE
[0034] The present disclosure provides an assembly of withdrawable module that can be operated with a single handle and single multi-start racking screw with a single keyhole.
[0035] The present disclosure performs various interlocking and provides multi-position placement of withdrawable module with single handle operation.
[0036] The present disclosure provides a simple, cost-effective, reliable and efficient withdrawable module.
[0037] The present disclosure provides an assembly of withdrawable module with simplified assembly, thereby requiring a smaller number of components.
[0038] The present disclosure provides an assembly of withdrawable module that ensures the full safety of the operator.

WE CLAIMS:

1. A withdrawable module (100) operated by a single handle, the withdrawable module comprising:
a door panel (102) having a cut-out profile (104), the cut-out profile (104) being spaced to form gap in the door panel (102);
atleast one keyhole (106) is provided at a bottom plate (108) of the cut-out profile (104), the atleast one keyhole (106) being spaced to define an opening;
a multi-start racking screw (110) accommodated inside the atleast one keyhole (106), wherein the opening of the atleast one keyhole (106) is being configured to receive a handle key (112) to couple with the multi-start racking screw (110) so as to rotate the multi-start racking screw (110) at different positions facilitating multi-position placement of the withdrawable module with single handle operation.
2. The withdrawable module as claimed in claim 1, wherein the multi-start racking screw (110), upon rotation of the handle key (112), is adapted to move the withdrawable module to different positions, wherein the different positions pertain to isolate, test and service positions.
3. The withdrawable module as claimed in claim 1, wherein the multi-start racking screw (110), upon rotation of the handle key (112), is adapted to move the withdrawable module to different positions to enable and disable all interlocking operations at correspondent positions.
4. The withdrawable module as claimed in claim 1, wherein the handle key (112) is adapted to be inserted into the opening of the atleast one keyhole (106) to rotate the multi-start racking screw (110) from one position to another when a power device is in OFF condition
5. The withdrawable module as claimed in claim 1, wherein the handle key (112) is adapted to be inserted into the opening of the atleast one keyhole (106) to rotate the multi-start racking screw (110) from one position to another when the door panel (102) is in closed condition.
6. The withdrawable module as claimed in claim 1, wherein the atleast one keyhole is of any shape, configuration and size.
7. The withdrawable module as claimed in claim 1, wherein the handle key (112) is of any shape, configuration and size, and the handle key couple with corresponding opening of the atleast one keyhole.
8. The withdrawable module as claimed in claim 1, wherein the withdrawable module located on a fixed partition tray (114), which is used to support a plurality of electrical equipment modules.