TECHNICAL FIELD
[0001] The present disclosure relates, in general, to low tension (LT) panels, and more specifically, relates to an assembly to unlock the shutter and allow multi-start racking screw movement to operate the withdrawable module.

BACKGROUND
[0002] In a 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 the open-door type or closed-door type. In open-door type, all the operations are performed when the door is open. Hence, it affects the safety of the operator.
[0003] In view of the above, the closed-door withdrawable module came into existence. The existing mechanism known in the art provides a shutter for handle insertion. The shutter provided for both the keyholes for key insertion. Further, they used a sliding mechanism, i.e., to slide the knob and then the shutter gets open to insert the key inside. However, the existing mechanisms suffer from limitations that 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 cost-effective, and efficient assembly for the withdrawable module that unlocks the shutter and allows the multi-start racking screw to rotate when the panel door is in closed condition and power device is in OFF condition.

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 with stay mechanism to unlock the shutter and allow multi-start racking screw movement to operate the withdrawable module.
[0006] Another object of the present disclosure is to provide a withdrawable module with multi-interlocking assemblies which are interrelated to one another and allow the withdrawable module to perform operations at suitable conditions effectively.
[0007] Another object of the present disclosure is to provide a withdrawable module with multi-interlocking assemblies that allow the user to operate the withdrawable module when the power device is in OFF state and the door is in the closed condition, thereby ensuring the safety of the operator.
[0008] Another object of the present disclosure that adopts universal switchgear.
[0009] Yet another object of the present disclosure is to provide simple, cost-effective and reliable assembly for the withdrawable module.

SUMMARY
[0010] The present disclosure relates, in general, to low tension (LT) panels, and more specifically, relates to an assembly to unlock the shutter and allow multi-start racking screw movement to operate the withdrawable module. The main objective of the present disclosure is to overcome the drawback, limitations, and shortcomings of the existing mechanism and solution, by providing a withdrawable module with a push mechanism and interlocking assembly, which allows the shutter to open and multi-start racking screw to rotate when the panel door is in closed condition and power device is in OFF condition. The interlocking assembly can include a push-button, which can be activated only when the door is closed and the power device is in OFF conditions. The multi-start racking screw, upon insertion of the handle, can be moved to different positions, i.e., isolate, test and service positions by rotating the handle. The push-button can be pressed only when the door is closed and the power device is in OFF condition that opens the shutter to insert the rotating handle key. Once the handle key is inserted, the withdrawal module can be moved to different positions by rotating the handle. This interlocking assembly have the stay assembly which allow the push button to be remain in pressed position until it moves from one position to another, the shutter assembly to insert the rotating handle and a stopper assembly to lock the multi-start racking screw. The interlocking assembly does not work even if one of the conditions is not satisfied, i.e., first, the door should be closed or second the power device should be OFF.
[0011] The present disclosure provides a push mechanism with multi-interlocking sub-assemblies that are connected with an sliding profile operated with the manual push button. The multi-interlocking sub-assemblies can include a latch assembly, a door stopper assembly, a stay assembly, a shutter assembly and a multi-start racking screw stopper assembly. The latch assembly interlock with power device does not allow the push button to operate the withdrawable module when the power device is in ON condition, hence, ensuring the safety of the operator as the user needs to switch OFF the power supply of device to operate the withdrawable module from one position to another. The door stopper assembly does not allow the push button to be operated when the door is in open condition, thereby ensuring the safety of the operator and the user can operate the withdrawable module in closed door condition only.
[0012] In addition, the sliding profile can include cut-outs for power device interlocking and studs for pushing stay assembly, shutter assembly and stopper assembly coupled to the bottom face of the sliding profile. When the door is in closed condition and the power device is in OFF condition, the push button can be pressed, and in effect of that stay mechanism pin travel and locked in contour slit, and simultaneously the sliding profile slides with that one stud of the sliding profile pushes L- plate of the shutter assembly due to which it shifts, and together with shutter clamp of the shutter assembly also shifts and get open and simultaneously another stud of the sliding profile pushes one end of the profile plate which results that a locking rod comes out of the racking chassis cut-out of the stopper assembly and free the multi-start racking screw for movement. The shutter assembly is opened to insert the handle key inside and the stopper assembly unlocks the multi-start racking screw to rotate the handle key from one position to another position i.e., isolate, test and service position to increase the safety of the operator. Accordingly, the withdrawable module with vertical bus bar arrangement at back side, contains universal switchgears and also provide full ease of operation with maximum safety.
[0013] Besides, the present disclosure includes various types of assemblies together perform all operations and can be fit inside any type of sheet metal housing with fixed width and 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 that has possibility to fit components from many manufacturers.
[0014] 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
[0015] 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.
[0016] FIG. 1A illustrates exemplary view of a power device latching assembly of the withdrawable module, in accordance with an embodiment of the present disclosure.
[0017] FIG. 1B illustrates exemplary bottom view of the withdrawable module in OFF condition shows that push button can be operated, in accordance with an embodiment of the present disclosure.
[0018] FIG. 1C illustrates exemplary bottom view of the withdrawable module in ON condition shows that push button cannot be operated, in accordance with an embodiment of the present disclosure.
[0019] FIG. 2A illustrates exemplary view of a door stopper assembly of the withdrawable module with door in open condition shows that push button cannot be operated, in accordance with an embodiment of the present disclosure.
[0020] FIG. 2B illustrates exemplary view of a door stopper assembly of the withdrawable module with door in close condition shows that push button can be operated, in accordance with an embodiment of the present disclosure.
[0021] FIG. 3A illustrates exemplary view of stay mechanism when push button is in normal condition, in accordance with an embodiment of the present disclosure.
[0022] FIG. 3B illustrates exemplary view of stay mechanism when push button is in pressed condition, in accordance with an embodiment of the present disclosure.
[0023] FIG. 4A illustrates exemplary view of a withdrawable module inside a panel board with shutter and stopper assembly and its front view indicating isolate position when the push button is not pressed, in accordance with an embodiment of the present disclosure.
[0024] FIG. 4B illustrates a sectional view of module inside a panel board and its front view indicating isolate position when the push button is pressed and ready to operate, in accordance with an embodiment of the present disclosure.
[0025] FIG. 4C illustrates a sectional view of module inside the panel board and its front view indicating test position when push button is came to its normal position, in accordance with an embodiment of the present disclosure.
[0026] FIG. 4D illustrates a sectional view of module inside the panel board and its front view indicating test position when the push button is pressed again to move toward next position, in accordance with an embodiment of the present disclosure.
[0027] FIG. 4E illustrates a sectional view of module inside the panel board and its front view indicating service position when push button is again came to its normal position, and also rotating handle key is removed and shows with that all interlocks get locked in accordance with an embodiment of the present disclosure.
[0028] FIG. 4F illustrates a sectional view of module inside a panel board and its front view indicating service position when the push button is pressed again to move towards test position, in accordance with an embodiment of the present disclosure.
DETAILED DESCRIPTION
[0029] 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.
[0030] 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.
[0031] The proposed assembly of the withdrawable module disclosed in the present disclosure overcomes the drawbacks, shortcomings, and limitations associated with the conventional mechanism by providing a withdrawable module with a push and stay mechanism and interlocking assembly, which allows the shutter to open and multi-start racking screw to rotate when the panel door is in closed condition and power device is in OFF condition. The push and stay mechanism with multi-interlocking sub-assemblies is connected with a sliding profile operated with a push-button. The multi-interlocking assembly can include a latch assembly, a door stopper assembly, a stay assembly, a shutter assembly and a multi-start racking screw stopper assembly. The latch assembly interlocking with power device does not allow the push button to operate the withdrawable module when the power device is in ON condition. The door stopper assembly does not allow the push button to be operated when the door is in open condition. In addition, when the door is in closed condition and the power device is in OFF condition, the push button can be pressed, wherein the effect that the stay mechanism pin travel and stay inside the contour slit other end and keep push button in pressed condition till next position reached. When the push button is in pressed position, the shutter assembly is opened to insert the handle key inside and the stopper assembly unlocks the multi -start racking screw to rotate the handle key from one position to another position i.e., isolate, test and service position. The power device can be switched ON at any of the position i.e., isolate - test - service even when the rotating handle key is inside, but to move from one position to another the power device switch should be in OFF 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.
[0032] In an aspect, the withdrawable module 100 to unlock the shutter and allow multi-start racking screw movement, the withdrawable module can include a latch assembly 102 having a pinion 108-1 and a rack 108-2 mounted on an L-clamp 112 fixed on a bottom plate 116 of the withdrawable module, the L-clamp 112 adapted to receive a rod 110 of a power device, wherein the rod 110 is movable, upon activation or deactivation of the power device, to shift the rack 108-2 vertically to lock and unlock a sliding profile 118 coupled to a push button 120-1 operable at isolate, test, and service positions.
[0033] At the deactivation state of the power device, the rod 110 moves which rotates the pinion 108-1 and due to which the rack 108-2 shifts up to unlock the sliding profile 118, wherein the handle key 402 is inserted inside the withdrawable module 100 and allow the movement of the multi-start racking screw 122 from isolate, test, service positions. Similarly, at the activation state of the power device, the rod 110 moves which rotates the pinion 108-1 and due to which the rack 108-2 shifts down to lock the sliding profile 118, wherein the handle key 402 is unable to be inserted inside the withdrawable module 100 and restricts the movement of the multi -start racking screw 122 irrespective of the position. The latch assembly 102 interlocks with any type of power device and restrict the push button 120-1 to operate the withdrawable module 100, when the power device is in ON condition and allow the push button 120-1 to operate the withdrawable module 100 when the power device is in OFF condition thereby ensuring the safety of the operator.
[0034] In another aspect, the door stopper assembly 200 of a door 202 having a profile clamp 204 that is bent from one corner which is coupled to the sliding profile 118, the door interlocking assembly 200 restrict and allow the movement of the sliding profile 118, upon opening and closing of the door respectively, to operate the push button 120-1 at isolate, test, and service positions. The stopper assembly 200 having the profile clamp 204 whose another corner is coupled to one end of an interlocking rod 208 and the other end of the interlocking rod 208 is coupled to a push button 120-2, wherein the stopper assembly 200 restrict the movement of the sliding profile 118 to restrict the push button 120-1 to be operated when the door 202 is in open condition, and allow to operate the push button 120-1 by pushing the door push button 120-2 mounted with the interlocking rod 208 using a door pin 216 fixed on the door 202 creating movement of the sliding profile 118 to operate the push button 120-1 in closed door condition, thereby ensuring the safety of the operator.
[0035] In another aspect, the sliding profile 118 slides freely with the help of cut-outs (126-1 to 126-3) on studs (128-1 to 128-3) fixed on the bottom plate 116 for the linear motion of the sliding profile 118.
[0036] In another aspect, a stay assembly 300 having a contour slit part 316 in which a stay pin 314 movable between a lock and unlock state to hold and release the push button 120-1 operable at isolate, test, and service positions. The stay assembly 300 comprises a profile 318 coupled to the sliding profile 118, wherein one end of profile 318 is connected with a spring 320 which is in tension to balance the other end where the stay pin 314 is mounted, wherein the stay pin 314 is fixed in the contour slit which hold the push button 120-1 in pressed condition, upon rotation of the handle key 402, the stay pin 314 comes out of contour slit groove so as to release the push button 120 -1.
[0037] In another aspect, a shutter assembly 302 having a shutter clamp 304-1 riveted with a L-plate 304-2 is coupled to the sliding profile 118, the shutter assembly is opened and closed, upon movement of the sliding profile 118, to insert and remove a handle key 402 to rotate a multi-start racking screw 122. The shutter clamp 304-1 riveted with the L-plate 304-2 is coupled to the sliding profile 118 through a stud 128-4, wherein upon operation of the push button 120-1, the stud 128-4 pushes the L- plate 304-2 to open the shutter clamp 304-1 to insert and remove the handle key 402.
[0038] In another aspect, a stopper assembly 306 having a profile plate 308-1 fixed on the bottom plate 116, one end of the profile plate 308-1 coupled to the sliding profile 118, the stopper assembly 306, upon the movement of the sliding profile 118, adapted to lock and unlock a racking chassis 312 to allow and restrict the movement of the multi -start racking screw 122 to operate the withdrawable module at isolate, test, and service positions.
[0039] The stopper assembly 306 having one end of the profile plate 308-1 coupled to a stud 128-5 of the sliding profile 118 and other end of the profile plate 308-1 is coupled to a locking rod 308-3 that is operable to be locked and unlocked with racking chassis cut-outs 310-1 to 310-3 of the racking chassis 312 to allow and restrict the movement of the multi-start racking screw 122. When the door is in closed condition and the power device is in OFF condition, the push button 120-1 is pressed, such that the shutter assembly 302 is opened to insert the handle key 402 and the stopper assembly 306 unlocks the racking chassis 312 and allow the movement of the multi-start racking screw 122 using the handle key 402, on rotating from isolate, test and service position to increase the safety of the operator.
[0040] The advantages achieved by the withdrawable module of the present disclosure can be clear from the embodiments provided herein. The present disclosure ensures safety of the operator, thereby avoiding a greater number of components and enables an efficient, reliable, simple and cost-effective solution. The withdrawable module with vertical bus bar arrangement at back side, contains universal switchgears and also provide full ease of operation with maximum safety. The assembly of withdrawable module can perform interdependent locking operations such as closed-door operation locking, power device locking, stay mechanism, shutter locking, racking screw locking and central push button locking. 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.
[0041] In an embodiment, an assembly is disclosed to provide a closed-door operation of the withdrawable module. The withdrawable module may be a switch fuse unit (SFU), direct on line (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 invention.
[0042] 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 module, as presented in the example can be, closed-door withdrawable module 100. In an exemplary embodiment, the withdrawable module 100 can include multi-interlocking assemblies which are interrelated to one another and allow the withdrawable module 100 to perform operations at suitable conditions. The multi-interlocking assemblies can include first assembly, second assembly, third assembly and fourth assembly.
[0043] In an embodiment, referring to FIG. 1A to 1C, the first assembly is a latch assembly 102, where the latch assembly 102 interlocks with any type of power device and does not allow push button 120-1 to operate the withdrawable module 100 when the power device is in ON condition, hence, ensures the safety of the operator as the user needs to switch OFF the power supply of device to operate the withdrawable module 100.
[0044] The second assembly is a door stopper assembly 200, where the door stopper assembly 200 is shown in FIG. 2A and FIG.2B respectively, and does not allow the push button 120-1 to be operated when the door 202 is in open condition, thereby ensuring the safety of the operator and the user can operate the withdrawable module 100 in closed door condition only.
[0045] The third assembly is a stay assembly 300, where a contour slit part 316 mounted on bottom plate 116 in which the stay pin 314 travels and responsible for locking and unlocking of push button 120-1. A profile 318 which is mounted with a sliding profile 118 and one end of profile 318 is connected with spring 320 and other is mounted with stay pin 314. The special design of racking chassis 312 guides the stay pin 314 such that to free the push button 120-1 after reaching respective positions, i.e., at isolate – test – service position.
[0046] Finally, the fourth assembly can be having two sub-assemblies namely shutter assembly 302 and multi-start racking screw stopper assembly 306 shown in FIG. 4A. When the door is in closed condition and the power device is in OFF condition, the push button can be pressed, wherein the effect of that the shutter assembly 302 is opened to insert the handle key 402 inside and the stopper assembly 306 unlocks racking chassis 312 and allow the movement of the multi -start racking screw 122 using the handle key 402, on rotating from one position to another position i.e., isolate, test and service position to increase the safety of the operator. Accordingly, the present disclosure relates to the assembly to unlock the shutter 302 and allow multi-start racking screw movement by pressing push button 120-1 only when the door is closed, and the power device is in off condition.
[0047] As illustrated in FIG.1A, the latching assembly 102 is mounted inside module 100. The latching assembly 102 can include a housing component 104 and cover 106 which holds the pinion 108-1 and rack 108-2 arrangement. A rod 110 of the power device is affixed inside the latch assembly 102, which is mounted on an L-clamp 112, fixed on bottom plate 116. A first cut-out 114-1 on the L-clamp 112 and a second cut-out 114-2 on the bottom plate 116 are provided for the vertical motion of rack 108-2.
[0048] In an embodiment, when the power device is in OFF condition, as depicted in FIG. 1B or when it is operated from ON to OFF condition, the rod 110 moves which also rotates the pinion 108-1 and due to which the rack 108-2 shifts up and unlock the sliding profile 118 at the cut-out 126-4. At this position, a push-button 120-1 can be operated when door 202 is closed. Therefore, in OFF condition, rotating handle key 402 can be inserted inside module 100 and allow the movement of multi-start racking screw 122 irrespective of the position, i.e., from isolate to service positions and vice-versa.
[0049] In another embodiment, as depicted in FIG. 1C, when the power device is in ON condition or when the power device is operated from OFF to ON condition, the rod 110 moves which also rotates the pinion 108-1 and due to which rack 108-2 shifts down and locks the sliding profile 118 at the cut-out 126-4. At this position, the push button 120-1 cannot be operated as the rack 108-2 locks the motion of the sliding profile 118 when door 202 is closed. Therefore, in ON condition, the rotating handle key 402 is unable to be inserted inside the module 100 and restricts the movement of multi -start racking screw 122 irrespective of the position, i.e., from isolate to service positions and vice-versa. Accordingly, at closed-door conditions, module 100 can be operated from isolate to service positions only if the power device is in OFF condition.
[0050] Referring to FIG. 2A, the second assembly is door stopper assembly 200 (also interchangeably referred to as door interlocking assembly, 200 herein) described below. FIG. 2A depicts module 100 inside the panel board and the door 202 is in open condition with a door pin 216 and also a bottom sectional view of module 100 inside the panel. The door interlocking assembly 200 have a profile clamp 204 mounted with rivet screw 206, which is fixed on the bottom plate 116. The profile clamp 204 is bent from one corner and another corner is mounted with one end of interlocking rod 208 fixed with circlip. The other end of interlocking rod 208 coupled with door push button 120-2 that is coming out of bush 210 affixed with a supporting clamp 205 mounted on the bottom plate 116. A spring 212 is affixed with the profile clamp 204 and stud 214, which is mounted on the bottom plate 116 to hold the assembly in its by default locked position as shown.
[0051] In an embodiment, when door 202 is in open condition, the door interlocking assembly 200 restrict the movement of the sliding profile 118 by locking its position as it is unable to press the push button 120-1 even if the power device is in OFF condition. Hence, the operations on module 100 are not performed, when door 202 is in open condition.
[0052] In another embodiment, when door 202 is in a closed state as shown in FIG. 2B, the door pin 216 fixed on door 202 pushes the door push button 120-2 mounted with interlocking rod 208 with on one end of profile clamp 204, which creates tension in spring 212 due to which the bent end of the profile clamp 204 shifts and the sliding profile 118, which is free to move, upon pressing the push button 120-1 when power device is in OFF condition. Therefore, operations on withdrawable module 100 can be performed if the door 202 is closed, i.e., in closed-door condition only. Accordingly, in closed-door operation, the operator can only be allowed to operate withdrawable module 100 only if the door is in closed condition.
[0053] Referring to FIG. 3A, the third assembly is a stay assembly 300 which shows exemplary view of stay mechanism when the push button 120-1 is in its normal position. A stay assembly comprises a contour slit part 316 mounted on bottom plate 116 in which the stay pin 314 is at its normal position of push button 120-1. A profile 318 which is mounted with the sliding profile 118 and one end of profile 318 is connected with spring 320 which is in tension to balance the other end where the stay pin 314 is mounted.
[0054] Referring to FIG. 3B, the stay assembly 300 which shows exemplary view of stay mechanism when the push button 120-1 is in pressed and unlocked position until it reached to next position, where a contour slit part 316 mounted on bottom plate 116 in which the stay pin 314 is locked in the contour slit groove at other end and keep the related shutter assembly 302 and stopper assembly 306 in unlock condition till the push button 120-1is pressed. A profile 318 which is mounted with the sliding profile and one end of profile 318 is connected with spring 320 which gets compressed to balance the other end where the stay pin 314 is mounted and fixed in the contour slit which hold push button 120-1 in pressed condition. On rotation of handle key 402, when the next position reached due to the special design of racking chassis 312, the stay pin 314 comes out of contour slit groove such that it free the push button 120 -1 when reached at respective positions, i.e., isolate – test – service position.
[0055] Referring to FIG. 4A, the fourth assembly is push button 120-1 with shutter assembly 302 and multi-start racking screw stopper assembly 306. FIG. 4A, shows a sectional view of module 100 inside the panel board and its front view indicating isolate position, when the push button is not pressed and also shows sub-assemblies in detail. The first sub-assembly can include the bottom plate 116 of the withdrawable module 100 that contain the push button 120-1, mounted inside a hole on the bottom plate 116, which is further connected with sliding profile 118, which is designed in such a way that it slides freely with the help of cut-outs (126-1 to 126-3) on studs (128-1 to 128-3) fixed on the bottom plate 116 for the linear motion of the sliding profile 118. The sliding profile 118 with the cut-out 126-4 configured for power device interlocking and the stud 128-4 for pushing shutter assembly 302 and the stud 128-5 for pushing stopper assembly 306 mounted on bottom face of the sliding profile 118.
[0056] The second sub-assembly is shutter assembly 302, which includes a shutter clamp 304-1 riveted with a L-plate 304-2 which is mounted with rivet screw 304-3 fixed on bottom plate 116. A spring 304-4 from one side fixed with L-plate 304-2 and another side on stud 304-5 fixed on the bottom plate 116 of withdrawable module 100 to hold shutter clamp 304-1 in the closed position by default. The one end of the L- plate 304-2 is in front of stud 128-4 of the sliding profile 118.
[0057] The third sub-assembly is stopper assembly 306 working as lever have a profile plate 308-1 mounted with rivet screw 308-2 which is fixed on bottom plate 116 of withdrawable module 100. One end of a locking rod 308-3 is fixed with profile plate 308-1 with a stud and the other is by default locked with racking chassis cut-outs (310-1 to 310-3) with respect to module 100 position i.e., isolate, test and service. The locking rod 308-3 is mounted inside a clamp 308-4 to fix its position. The other end of profile plate 308-1 is in front of stud 128-5 of the sliding profile 118. The profile plate 308-1 is connected with a spring 308-5 fixed on clamp 308-4 to hold the locking rod 308-3 in locked positions by default.
[0058] Now, at the isolate position, the door 202 is closed and the power device is OFF; the push button 120-1 is not pressed indicating shutter assembly 302 is closed and multi-start racking screw 122 is locked by stopper assembly 306. Hence, at this position the module 100 is ready to operate.
[0059] FIG. 4B shows a sectional view of module 100 inside a panel board and its front view indicating an isolate position when the push button 120-1 is pressed. When the power device is in OFF condition and door 202 is closed, then, the push button 120-1 is pressed and stay at its position due to stay mechanism 300 and simultaneously sliding profile 118 slides and with that the stud 128-4 pushes L- plate 304-2 due to which it shifts and together with the shutter clamp 304-1 also shifts and get open while creating tension in spring 304-4, now, the rotating handle key 402 can be inserted inside the module 100 through round key hole 404 and simultaneously the stud 128-5 pushes one end of the profile plate 308-1 which results that the locking rod 308-3 comes out of the racking chassis cut-out 310-1 and free the multi-start racking screw 122 for movement. Hence, at the isolate position, the rotating handle key 402 can be inserted inside the module 100 and rotate the racking screw 122.
[0060] FIG. 4C shows a sectional view of module 100 inside the panel board and its front view indicating the test position when push button 120-1 is not pressed, i.e., after two clockwise rotations, module 100 shifts from isolate to test position. As the push button 120-1 is released back to its normal position due to special design of racking chassis 312 and stay assembly 300, so, at the test position, the sliding profile 118 move to its normal condition i.e., the shutter clamp 304-1 does not close as the rotating handle key 402 is still inside the module 100. However, on the other hand, racking chassis 312 is locked by stopper assembly 306 as locking rod 308-3 is locked at racking chassis cut-out 310-2.
[0061] Further as illustrated in FIG. 4D a sectional view of module 100 inside the panel board and its front view indicating test position when the push button 120-1 is pressed. Again to move from test to service position; at test position, when the power device is in OFF condition and door 202 is closed, then, the push button 120-1 is pressed and in the effect of that sliding profile 118 slides and with that the stud 128-4 pushes L- plate 304-2 due to which it shift and together with the shutter clamp 304-1 also shift and get open and simultaneously stud 128-5 pushes one end of the profile plate 308-1 which results that the locking rod 308-3 comes out of the racking chassis cut-out 310-2. Hence, the handle 402 can be rotated inside module 100, to move further.
[0062] FIG. 4E depicts a sectional view of module 100 inside the panel board and its front view indicating service position when push button 120-1 is not pressed. After one clockwise rotation, the module shifts from the test to the service position. As the push button 120-1 is released back to its normal position due to special design of racking chassis 312 and stay assembly 300, so, at service position, the sliding profile 118 move to its normal position i.e., the shutter clamp 304-1 does not close as the rotating handle key 402 is still present inside module 100. However, on the other hand, racking chassis 312 is locked as locking rod 308-3 is locked at racking chassis cut-out 310-3.
[0063] The handle 402 can be removed from module 100 at isolate & service position. Hence, at service position, as the rotating handle 402 comes out of the module 100, the shutter clamp 304-1 gets closed.
[0064] FIG. 4F shows a sectional view of module 100 inside a panel board and its front view indicating the service position and again, to move from service to test position, the push button 120-1 is pressed to insert handle key 402 and take one anticlockwise rotation. Further, as the push button 120-1 release, the shutter assembly 302 and stopper assembly 306 lock at the test position and to move from test to isolate position, the push button 120-1 is pressed again and takes two anticlockwise rotations. Now, again at isolate position the push button 120-1 released, and the stopper assembly 306 locks at isolate position and as we remove the rotating handle 402 the shutter assembly 302 also gets locked automatically.
[0065] Hence, when door 202 is closed and the power device is OFF, then only it is allowed to press the push button 120-1 so that shutter assembly 302 opens and handle 402 fits inside the module 100 and perform operations and also multi-start racking screw 122 is free to move from one position to another as stopper assembly 306 is unlocked to perform the racking operations.
[0066] Thus, the present invention overcomes the drawbacks, shortcomings, and limitations associated with existing solutions, and provides the withdrawable module with multi-interlocking assemblies which are interrelated to one another and allow the withdrawable module to perform operations at suitable conditions effectively. The withdrawable module with multi-interlocking assemblies that allow the user to operate the withdrawable module when the power device is in OFF state and the door is in the closed condition, thereby ensuring the safety of the operator. Further, the module adopts universal switchgear and provide simple, cost-effective and reliable assembly for the withdrawable module.
[0067] It will be apparent to those skilled in the art that the assembly of the withdrawable module 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
[0068] The present disclosure provides a withdrawable module with multi-interlocking assemblies which are interrelated to one another and allow the withdrawable module to perform operations at suitable conditions effectively.
[0069] The present disclosure provides a withdrawable module with multi-interlocking assemblies that allow the user to operate the withdrawable module when the power device is in OFF state and the door is in the closed condition, thereby ensuring the safety of the operator.
[0070] The present disclosure adopts universal switchgear
[0071] The present disclosure provides a simple, cost-effective and reliable assembly for the withdrawable module.

WE CLAIMS:

1. A withdrawable module to unlock the shutter and allow multi-start racking screw movement, the withdrawable module comprising:
a latch assembly (102) having a pinion (108-1) and a rack (108-2) mounted on an L-clamp (112) fixed on a bottom plate (116) of the withdrawable module, the L-clamp (112) adapted to receive a rod (110) of a power device, wherein the rod (110) is movable, upon activation or deactivation of the power device, to shift the rack (108-2) vertically to lock and unlock a sliding profile (118) coupled to a push button (120-1) operable at isolate, test, and service positions;
a door stopper assembly (200) of a door (202) having a profile clamp (204) that is bent from one corner which is coupled to the sliding profile (118), the door interlocking assembly (200) restrict and allow the movement of the sliding profile (118), upon opening and closing of the door respectively, to operate the push button (120-1) at isolate, test, and service positions;
a stay assembly (300) having a contour slit part (316) in which a stay pin (314) movable between a lock and unlock state to hold and release the push button (120-1) operable at isolate, test, and service positions;
a shutter assembly (302) having a shutter clamp (304-1) riveted with a L-plate (304-2) is coupled to the sliding profile (118), the shutter assembly is opened and closed, upon movement of the sliding profile (118), to insert and remove a handle key (402) to rotate a multi-start racking screw (122); and
a stopper assembly (306) having a profile plate (308-1) fixed on the bottom plate (116), one end of the profile plate (308-1) coupled to the sliding profile (118), the stopper assembly (306), upon the movement of the sliding profile (118), adapted to lock and unlock a racking chassis (312) to allow and restrict the movement of the multi -start racking screw (122) to operate the withdrawable module at isolate, test, and service positions.
2. The withdrawable module as claimed in claim 1, wherein at the deactivation state of the power device, the rod (110) moves which rotates the pinion (108-1) and due to which the rack (108-2) shifts up to unlock the sliding profile (118), wherein the handle key (402) is inserted inside the withdrawable module (100) and allow the movement of the multi-start racking screw (122) from isolate, test, service positions.

3. The withdrawable module as claimed in claim 1, wherein at the activation state of the power device, the rod (110) moves which rotates the pinion (108-1) and due to which the rack (108-2) shifts down to lock the sliding profile (118), wherein the handle key (402) is unable to be inserted inside the withdrawable module (100) and restricts the movement of the multi -start racking screw (122) irrespective of the position.

4. The withdrawable module as claimed in claim 1, wherein latch assembly (102) interlocks with any type of power device and restrict the push button (120-1) to operate the withdrawable module (100) when the power device is in on condition and allow the push button (120-1) to operate the withdrawable module (100) when the power device is in off condition thereby ensuring the safety of the operator.

5. The withdrawable module as claimed in claim 1, the sliding profile (118) slides freely with the help of cut-outs (126-1 to 126-3) on studs (128-1 to 128-3) fixed on the bottom plate (116) for the linear motion of the sliding profile (118).

6. The withdrawable module as claimed in claim 1, wherein the door stopper assembly (200) having the profile clamp (204) whose another corner is coupled to one end of an interlocking rod (208) and the other end of the interlocking rod (208) is coupled to a push button (120-2), wherein the door stopper assembly (200) restrict the movement of the sliding profile (118) to restrict the push button (120-1) to be operated when the door (202) is in open condition, and allow to operate the push button (120-1) by pushing the door push button (120-2) mounted with the interlocking rod (208) using a door pin (216) fixed on the door (202) creating movement of the sliding profile (118) to operate the push button (120-1) in closed door condition, thereby ensuring the safety of the operator.

7. The withdrawable module as claimed in claim 1, wherein the stay assembly (300) comprises a profile (318) coupled to the sliding profile (118), wherein one end of the profile (318) is connected with a spring (320) which is in tension to balance the other end where the stay pin (314) is mounted, wherein the stay pin (314) is fixed in the contour slit which hold the push button (120-1) in pressed condition, upon rotation of the handle key (402), the stay pin (314) comes out of contour slit groove so as to release the push button (120 -1);

8. The withdrawable module as claimed in claim 1, wherein the shutter clamp (304-1) riveted with the L-plate (304-2) is coupled to the sliding profile (118) through a stud (128-4), wherein upon operation of the push button (120-1), the stud (128-4) pushes the L- plate (304-2) to open the shutter clamp (304-1) to insert and remove the handle key (402).

9. The withdrawable module as claimed in claim 1, wherein the stopper assembly (306) having one end of the profile plate (308-1) coupled to a stud (128-5) of the sliding profile (118) and other end of the profile plate (308-1) is coupled to a locking rod (308-3) that is operable to be locked and unlocked with racking chassis cut-outs (310-1 to 310-3) of the racking chassis (312) to allow and restrict the movement of the multi-start racking screw (122).

10. The withdrawable module as claimed in claim 1, wherein when the door is in closed condition and the power device is in off condition, the push button (120-1) is pressed, such that the shutter assembly (302) is opened to insert the handle key (402) and the stopper assembly (306) unlocks the racking chassis (312) and allow the movement of the multi-start racking screw (122) using the handle key (402), on rotating from isolate, test and service position to increase the safety of the operator.