Contactor position regulating interlock device and contactor assembly having the same

Abstract

The utility model relates to electrical equipment technical field, concretely relates to a contactor position adjusting interlock device and contactor assembly having it. Including first transmission part, the horizontal part of this first transmission part is used for with the interlock of first contactor department interaction, the second transmission part is formed with the connecting portion for with the first linkage shaft interaction on this second transmission part, the connecting portion is in horizontal direction and / or vertical direction and is offset to the horizontal part, first transmission part is in response to the attraction action of first contactor and vertically moves, second transmission part is in response to the movement of first transmission part and rotates, first linkage shaft is in response to the rotation of second transmission part and vertically moves and is higher than second linkage shaft, and then main interlock device restricts second contactor attraction. In the utility model, by setting the connecting portion and the horizontal part that are offset each other in vertical direction and / or horizontal direction, the problem of misalignment of the interlocking center position between the contactors is solved, and installation space is provided for the auxiliary contact.

Description

Technical Field

[0001] This utility model relates to the field of electrical equipment technology, specifically to a contactor position adjustment interlock device and a contactor assembly having the same. Background Technology

[0002] In electrical control systems, contactors, as the core component for controlling the on / off state of circuits, are widely used in industrial equipment, power systems, automated production lines, and other fields. To ensure safe circuit operation and prevent short circuits, equipment damage, or even safety accidents caused by two circuits being simultaneously active, an interlocking structure is usually required for two contactors of the same model. This interlocking structure mechanically or electrically restricts the moving iron cores of the two contactors from engaging simultaneously, ensuring that only one path in the circuit is active. This interlocking design has become a key safety guarantee in contactor applications.

[0003] Chinese utility model patent CN222838717U discloses an interlocking device. According to this document, the interlocking device has a first working state and a second working state, and includes a first linkage shaft and a second linkage shaft. The first linkage shaft interacts with a first contactor, and the second linkage shaft interacts with a second contactor. In the first working state, the first contactor is engaged, the first linkage shaft is higher than the second linkage shaft, and the interlocking device restricts the engagement of the second contactor. In the second working state, the second contactor is engaged, the second linkage shaft is higher than the first linkage shaft, and the interlocking device restricts the engagement of the first contactor. Furthermore, the interlocking device also has an idle state, in which the extension directions of the first and second linkage shafts are substantially the same. Because the extension directions of the first and second linkage shafts are substantially the same, the interlocking device is preferably suitable for two contactors of the same model. If the two contactors are of different models and their interlocking positions are not aligned, problems such as the interlocking device being unable to be installed with the two contactors or the bottom surfaces of the two contactors not being on the same plane after installation may occur. In addition, there is a significant space adaptation problem in actual installation scenarios: when the contactor and the interlocking device are assembled, the installation position of the interlocking device overlaps and conflicts with the preset installation space of the contactor auxiliary contacts, making it impossible to install them at the same time and affecting the realization of circuit control functions.

[0004] These problems severely impact installation efficiency, system stability, and functional expansion, necessitating an interlocking solution that can adapt to different models, avoid interference, and ensure stable installation. Utility Model Content

[0005] Therefore, the purpose of this utility model is to provide a contactor position adjustment interlock device to solve at least one of the above-mentioned problems.

[0006] This utility model provides a contactor position adjustment interlocking device, which is connected to a main interlocking device and a first contactor. The main interlocking device has a first working state and a second working state and includes a first linkage shaft and a second linkage shaft. The second linkage shaft interacts with the second contactor. In the first working state, the first contactor is engaged, the first linkage shaft is higher than the second linkage shaft, and a limiting structure within the main interlocking device restricts the engagement of the second contactor. In the second working state, the second contactor is engaged, the second linkage shaft is higher than the first linkage shaft, and a limiting structure within the main interlocking device restricts the engagement of the first contactor. The device includes: a first transmission member, the horizontal portion of which interacts with the interlocking portion of the first contactor; and a second transmission member. The second transmission member has a connecting portion for interacting with the first linkage shaft. The connecting portion extends in a direction opposite to the horizontal portion and is offset from the horizontal portion in the horizontal and / or vertical directions. The first transmission member moves vertically in response to the engagement of the first contactor, the second transmission member rotates in response to the movement of the first transmission member, and the first linkage shaft moves vertically and is higher than the second linkage shaft in response to the rotation of the second transmission member. Thus, the main interlocking device is in a first working state and restricts the engagement of the second contactor through the limiting structure. After the second contactor engages, the main interlocking device is in a second working state and restricts the engagement of the first contactor in sequence through the limiting structure, the first linkage shaft, the second transmission member, and the first transmission member.

[0007] Preferably, the device includes a third transmission member and a housing with an inner cavity, wherein the third transmission member and the second transmission member are at least partially located within the housing, the first transmission member includes a vertical portion connected to the horizontal portion, the vertical portion being fixed to the third transmission member by fasteners, and at least a portion of the horizontal portion extending outside the housing.

[0008] Preferably, the outer casing has a fixing post, the second transmission member has a first connecting hole for fitting onto the fixing post, the third transmission member has a first protrusion, the second transmission member has a second connecting hole for fitting onto the first protrusion, the connecting part is a third connecting hole, and the second connecting hole and the third connecting hole are generally located on both sides of the first connecting hole in the horizontal direction.

[0009] Preferably, the first protrusion moves vertically downward in response to the engagement of the first contactor, and the second transmission member rotates around the fixed post in response to the movement of the first protrusion, thereby causing the third connecting hole to rotate upward.

[0010] Preferably, the second connecting hole is an oblong hole.

[0011] Preferably, a reset member is included, wherein the third transmission member is biased downward in response to the engagement of the first contactor, and the reset member is reset in response to the disengagement of the first contactor.

[0012] Preferably, the third transmission member has a fourth protrusion for switching the auxiliary contact on and off in response to the on / off state of the first contactor.

[0013] Preferably, the housing includes a first housing and a second housing that are interlocked with each other, the first housing having a first clearance hole for the horizontal portion to extend out, the second housing having a second clearance hole for the connecting portion to extend out, and the housing having a connection structure for mounting to the first contactor and the main interlocking device.

[0014] In another aspect, this utility model provides a contactor assembly, including a first contactor, a second contactor, a main interlocking device, an auxiliary contact connected to the first contactor, and a contactor position adjustment interlocking device. The contactor position adjustment interlocking device is connected between the first contactor and the main interlocking device, and the main interlocking device is connected between the contactor position adjustment interlocking device and the second contactor.

[0015] In this invention, the horizontal portion of the first transmission member interacts with the interlocking portion of the first contactor, and the connecting portion of the second transmission member interacts with the first linkage shaft of the main interlocking device. After the first contactor engages, the first transmission member moves vertically, causing the second transmission member to rotate. This, in turn, causes the first linkage shaft to move vertically and become higher than the second linkage shaft, thus placing the main interlocking device in a first working state and restricting the engagement of the second contactor. After the second contactor engages, the main interlocking device is in a second working state and sequentially restricts the engagement of the first contactor through the limiting structure, the first transmission shaft, the second transmission member, and the first transmission member. The contactor position adjustment interlocking device in this invention solves the problems of inconsistent interlocking heights and misaligned interlocking centers between two contactors by setting connecting portions and horizontal portions that are offset from each other in the vertical and / or horizontal directions. This ensures that the bottom surfaces of the two interlocked contactors are on the same height plane, expanding the range of contactor models that require interlocking. Furthermore, the contactor position adjustment interlock device in this utility model provides an independent and compliant installation space for the auxiliary contacts without affecting the overall structural adaptability, thus resolving the spatial conflict between the interlock device and the auxiliary contacts and ensuring that both types of components can be assembled in a standardized manner and perform their intended functions. Attached Figure Description

[0016] The embodiments of this utility model will now be described in detail with reference to the accompanying drawings, wherein:

[0017] Figure 1This is a schematic diagram of the contactor assembly in this utility model;

[0018] Figure 2 This is a schematic diagram showing the connection of the contactor position adjustment interlock device and the main interlock device at one angle in this utility model;

[0019] Figure 3 yes Figure 2 A schematic diagram showing the separation of the intermediate contactor position adjustment interlock device from the main interlock device;

[0020] Figure 4 yes Figure 2 A schematic diagram showing the connection between the intermediate contactor position adjustment interlock device and the main interlock device from another angle;

[0021] Figure 5 This is an exploded view of the contactor position adjustment interlock device in this utility model;

[0022] Figure 6 This is a schematic diagram of the internal structure of the contactor position adjustment interlock device in this utility model;

[0023] Figure 7 This is a schematic diagram of the first transmission component in this utility model;

[0024] Figure 8 This is a schematic diagram of the second transmission component in this utility model;

[0025] Figure 9 This is a schematic diagram of one angle of the third transmission component in this utility model;

[0026] Figure 10 This is a schematic diagram of the third transmission component in this utility model from another angle.

[0027] Explanation of reference numerals in the attached figures

[0028] 10-Main interlock device; 11-First linkage shaft; 12-Second linkage shaft; 20-First contactor; 30-Second contactor; 40-Auxiliary contact; 50-Contactor position adjustment interlock device; 100-First transmission component; 110-Horizontal part; 120-Vertical part; 200-Second transmission component; 210-Connecting part; 220-First connecting hole; 230-Second connecting hole; 300-Third transmission component; 310-First protrusion; 320-Second protrusion; 330-Third protrusion; 340-Fourth protrusion; 400-Outer shell; 410-First housing; 411-First clearance hole; 412-Fixing post; 420-Second housing; 421-Second clearance hole; 422-Third clearance hole; 500-Reset component. Detailed Implementation

[0029] The present invention will be further described in detail below with reference to specific embodiments. The embodiments given are only for illustrating the present invention and are not intended to limit the scope of the present invention.

[0030] The schematic solutions of the technical solutions disclosed in this utility model are now described in detail with reference to the accompanying drawings. Although the drawings are provided to illustrate some embodiments of this utility model, the drawings are not necessarily drawn to the dimensions of the specific embodiments, and certain features may be enlarged, removed, or partially cut to better illustrate and explain the disclosure of this utility model. Some components in the drawings may be repositioned according to actual needs without affecting the technical effect. The phrase "in the drawings" or similar terms appearing in the specification do not necessarily refer to all drawings or examples.

[0031] Certain directional terms used in the description of the accompanying drawings below, such as “inner,” “outer,” “above,” “below,” and other directional terms, will be understood to have their normal meaning and refer to those directions as normally viewed in the accompanying drawings. Unless otherwise specified, the directional terms used in this specification are generally in accordance with the conventional directions understood by those skilled in the art.

[0032] The terms “first,” “first,” “second,” “second,” and similar terms used in this utility model do not indicate any order, quantity, or importance, but are used to distinguish one component from other components.

[0033] Figure 1 This is a schematic diagram of the contactor assembly in this utility model from one angle, showing the positional relationship of the main interlocking device 10, the first contactor 20, the second contactor 30, the auxiliary contact 40, and the contactor position adjustment interlocking device 50. Figure 2 for Figure 1 A schematic diagram showing the connection between the contactor position adjustment interlock device 50 and the main interlock device 10. Figure 3 for Figure 2 A schematic diagram showing the separation of the intermediate contactor position adjustment interlock device 50 from the main interlock device 10, wherein the first linkage shaft 11 of the main interlock device 10 is shown. Figure 4 for Figure 2 A schematic diagram of the connection between the intermediate contactor position adjustment interlock device 50 and the main interlock device 10 from another angle, showing the second linkage shaft 12 of the main interlock device 10. Figure 5 This is an exploded view of the contactor position adjustment interlock device 50 of the present invention, showing the internal structure of the contactor position adjustment interlock device 50. Figure 6 The second housing 40 in the contactor position adjustment interlock device 50 is hidden, making the internal structure of the contactor position adjustment interlock device 50 visible. Figure 7 This is a schematic diagram of one angle of the first transmission component 100. Figure 8 This is a schematic diagram of one angle of the second transmission component 200. Figure 9 This is a schematic diagram of one angle of the third transmission component 300. Figure 10 This is a schematic diagram of the third transmission member 300 from another angle, showing the third protrusion 330.

[0034] As described in the background section, the main interlocking device 10 in this utility model is the interlocking device disclosed in Chinese Utility Model Patent Publication No. CN222838717U. The main interlocking device 10 has a first operating state and a second operating state and includes a first linkage shaft 11 and a second linkage shaft 12. The second linkage shaft 12 interacts with a second contactor 30. In the first operating state, the first linkage shaft 11 is higher than the second linkage shaft 12, and a limiting structure within the main interlocking device 10 restricts the second contactor 30 from engaging. In the second operating state, the second linkage shaft 12 is higher than the first linkage shaft 11, and a limiting structure within the main interlocking device 10 restricts the first contactor 20 from engaging. The contactor position adjustment interlock device 50 of this utility model is connected to the main interlock device 10 and the first contactor 20 respectively, and includes a first transmission member 100. The horizontal portion 110 of the first transmission member 100 is used to interact with the interlocking portion of the first contactor 20. The second transmission member 200 has a connecting portion 210 formed on it for interacting with the first linkage shaft 11. The connecting portion 210 and the horizontal portion 110 extend in opposite directions to each other, and the connecting portion 210 is offset from the horizontal portion 110 in the horizontal direction and / or vertical direction. The first transmission member 100 moves vertically in response to the engaging action of the first contactor 20, and the second transmission member 200 rotates in response to the movement of the first transmission member 100. The first linkage shaft 11 moves vertically and is higher than the second linkage shaft 12 in response to the rotation of the second transmission member 200. Thus, the main interlock device 10 is in a first working state and restricts the engaging of the second contactor 30.

[0035] Combination Figures 2 to 4In this utility model, the horizontal part 110 of the first transmission member 100 interacts with the interlocking part of the first contactor 20, and the connecting part 210 of the second transmission member 200 interacts with the first linkage shaft 11 of the main interlocking device 10. After the first contactor 20 is engaged, the first transmission member 100 moves vertically, thereby causing the second transmission member 200 to rotate. Consequently, the first linkage shaft 11 moves vertically and is higher than the second linkage shaft 12, so that the main interlocking device 10 is in the first working state. Due to the limiting structure inside the main interlocking device 10, the second contactor 30 cannot be engaged after the first contactor 20 is engaged, thus realizing the interlocking of the first contactor 20 and the second contactor 30. After the second contactor 30 is engaged, the main interlocking device 10 is in the second working state, and the engagement of the first contactor 20 is restricted in sequence by the limiting structure inside the main interlocking device 10, the first linkage shaft 11, the second transmission member 200, and the first transmission member 100. The interlocking part of the first contactor 20 can be a support for the moving contact. The contactor position adjustment interlocking device 50 of this utility model solves the problems of inconsistent interlocking heights and misaligned interlocking centers between two contactors by setting a connecting part 210 and a horizontal part 110 that are offset from each other in the vertical and / or horizontal directions. This ensures that the bottom surfaces of the two interlocked contactors are on the same height plane, expanding the range of contactor models that require interlocking with the main interlocking device 10. Furthermore, the contactor position adjustment interlocking device 50, without affecting the overall structural adaptability, reserves independent and compliant installation space for the auxiliary contact 40, resolving the spatial conflict between the main interlocking device 10 and the auxiliary contact 40, and ensuring that both types of components can be assembled correctly and perform their intended functions.

[0036] Combination Figures 5 to 6 The contactor position adjustment interlock device 50 further includes a third transmission member 300 and a housing 400 having an inner cavity. The third transmission member 300 and the second transmission member 200 are at least partially located within the housing 400. The housing 400 includes a first housing 410 and a second housing 420 that are interlocked with each other. The first housing 410 has a fixing post 412. The first housing 410 has a first clearance hole 411 for the horizontal portion 110 to extend out, and the second housing 420 has a second clearance hole 421 for the connecting portion 210 to extend out. The first housing 410 and the second housing 420 respectively have connection structures for mounting to the first contactor 20 and the main interlock device 10.

[0037] Reference Figure 8The second transmission member 200 has a first connecting hole 220 for fitting onto the fixed post 412. The third transmission member 300 has a first protrusion 310. The second transmission member 200 has a second connecting hole 230 for fitting onto the first protrusion 310. The connecting portion 210 can be the third connecting hole. The first linkage shaft 11 is preferably inserted into the third connecting hole. The second connecting hole 230 and the third connecting hole are generally located on both sides of the first connecting hole 220 in the horizontal direction. The first protrusion 310 moves vertically downward in response to the engagement of the first contactor 20. The second transmission member 200 rotates around the fixed post 412 in response to the movement of the first protrusion 310, thereby causing the third connecting hole to rotate upward. The second transmission member 200 is... Figure 6 In the view shown, rotating clockwise upwards around the fixed column 412 causes the first linkage shaft 11 inserted into the third connection hole to move upwards, thereby putting the main interlocking device 10 into the first working state.

[0038] In a preferred embodiment, in order to facilitate the rotation of the second transmission member 200 in response to the vertical movement of the third transmission member 300, the second connecting hole 230 is preferably an oblong hole.

[0039] Reference Figure 7 The first transmission member 100 includes a vertical portion 120 connected to the horizontal portion 110. The vertical portion 120 is fixed to the third transmission member 300 by fasteners. At least a portion of the horizontal portion 110 extends outside the housing 400 to interact with the interlocking portion of the first contactor 20. In one embodiment, the first transmission member 100 and the third transmission member 300 may be an integral part.

[0040] Reference Figure 5 and Figure 6 The contactor position adjustment interlock device 50 includes a reset member 500. A third transmission member 300, in response to the engagement of the first contactor 20, biases the reset member 500 downwards. The reset member 500, in response to the disengagement of the first contactor 20, rebounds and resets the third transmission member 300. The reset member 500 is preferably a compression spring, and references... Figure 9 and Figure 10 The third transmission member 300 has a second protrusion 320 and a third protrusion 330 for connection with the compression spring, respectively.

[0041] In addition, refer to Figure 9 The third transmission member 300 may have a fourth protrusion 340 for switching the auxiliary contact 40 on and off in response to the on / off state of the first contactor 20, and the second housing 420 preferably has a third clearance hole 422 for avoiding interaction between the fourth protrusion 340 and the auxiliary contact 40.

[0042] Reference Figure 1 This utility model also provides a contactor assembly, including a first contactor 20, a second contactor 30, a main interlocking device 10, an auxiliary contact 40 connected to the first contactor 20, and the aforementioned contactor position adjustment interlocking device 50. The contactor position adjustment interlocking device 50 is connected between the first contactor 20 and the main interlocking device 10, and the main interlocking device 10 is connected between the contactor position adjustment interlocking device 50 and the second contactor 30. In a preferred embodiment, the moving contact of the first contactor 20 is located above the stationary contact. The moving contact support moves downward and drives the horizontal part 110 of the first transmission member 100 to move downward, causing the connecting part 210 of the second transmission member 200 to rotate upward. Thus, the main interlocking device 10 is in a first working state. Due to the limiting structure inside the main interlocking device 10, after the first contactor 20 is engaged, the second contactor 30 cannot be engaged, thereby achieving interlocking between the first contactor 20 and the second contactor 30. At the same time, the fourth protrusion 340 on the third transmission member 300 moves downward, causing the auxiliary contact 40 to connect or disconnect.

[0043] The moving contact of the second contactor 30 is located below the stationary contact. The moving contact bracket moves upward and drives the second connecting shaft 12 to move upward, so that the main interlocking device 10 is in the second working state. Due to the limiting structure inside the main interlocking device 10, the first contactor 20 cannot be engaged after the second contactor 30 is engaged, thus realizing the interlocking of the first contactor 20 and the second contactor 30.

[0044] Therefore, the contactor position adjustment interlock device 50 in this invention can also adapt to two contactors with different directions of movement (vertical direction) in the magnetic attraction system, enabling them to reliably interlock. Furthermore, the contactor position adjustment interlock device 50 provides space for installing the auxiliary contact 40 and provides a fourth protrusion 340 for driving the auxiliary contact 40 to open and close. The mechanical triggering method precisely controls the closing and opening of the auxiliary contact 40, achieving real-time feedback of the control signal without the need for additional drive components. This simplifies the overall structure and ensures the synchronization of the auxiliary contact 40 with the main circuit.

[0045] Furthermore, the contactor assembly in this invention has the same advantages as the contactor position adjustment interlock device 50 described above, and will not be repeated here.

[0046] It should be understood that although this specification describes various embodiments, not every embodiment contains only one independent technical solution. This way of describing the specification is only for clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

[0047] The above description is merely an illustrative embodiment of this utility model and is not intended to limit the scope of this utility model. Any equivalent changes, modifications, and combinations made by those skilled in the art without departing from the concept and principles of this utility model should fall within the protection scope of this utility model.

Claims

1. A contactor position adjustment interlock device, the position adjustment interlock device being connected to a main interlock device (10) and a first contactor (20), the main interlock device (10) having a first working state and a second working state and including a first linkage shaft (11) and a second linkage shaft (12), the second linkage shaft (12) interacting with a second contactor (30), in the first working state, the first contactor (20) is engaged, the first linkage shaft (11) is higher than the second linkage shaft (12), and a limiting structure within the main interlock device (10) restricts the engagement of the second contactor (30), in the second working state, the second contactor (30) is engaged, the second linkage shaft (12) is higher than the first linkage shaft (11), and a limiting structure within the main interlock device (10) restricts the engagement of the first contactor (20), characterized in that, include: A first transmission member (100) has a horizontal portion (110) for interacting with an interlocking portion of the first contactor (20); A second transmission member (200) has a connecting portion (210) formed thereon for interacting with the first linkage shaft (11). The connecting portion (210) extends in a direction opposite to the horizontal portion (110), and the connecting portion (210) is offset from the horizontal portion (110) in the horizontal direction and / or vertical direction. The first transmission member (100) moves vertically in response to the engaging action of the first contactor (20), the second transmission member (200) rotates in response to the movement of the first transmission member (100), and the first linkage shaft (11) moves vertically and is higher than the second linkage shaft (12) in response to the rotation of the second transmission member (200). Thus, the main interlock device (10) is in a first working state and the limiting structure restricts the engaging of the second contactor (30). After the second contactor (30) is engaged, the main interlock device (10) is in a second working state and sequentially restricts the engagement of the first contactor (20) through the limiting structure, the first linkage shaft (11), the second transmission member (200) and the first transmission member (100).

2. The contactor position adjustment interlock device according to claim 1, characterized in that, It also includes a third transmission member (300) and a housing (400) having an inner cavity, the third transmission member (300) and the second transmission member (200) being at least partially located within the housing (400), the first transmission member (100) including a vertical portion (120) connected to the horizontal portion (110), the vertical portion (120) being fixed to the third transmission member (300) by fasteners, and at least a portion of the horizontal portion (110) extending outside the housing (400).

3. The contactor position adjustment interlock device according to claim 2, characterized in that, The outer casing (400) has a fixing post (412), and the second transmission member (200) has a first connecting hole (220) for fitting onto the fixing post (412). The third transmission member (300) has a first protrusion (310), and the second transmission member (200) has a second connecting hole (230) for fitting onto the first protrusion (310). The connecting part (210) is the third connecting hole. The second connecting hole (230) and the third connecting hole are generally located on both sides of the first connecting hole (220) in the horizontal direction.

4. The contactor position adjustment interlock device according to claim 3, characterized in that, The first protrusion (310) moves vertically downward in response to the engagement of the first contactor (20), and the second transmission member (200) rotates around the fixed post (412) in response to the movement of the first protrusion (310), thereby causing the third connecting hole to rotate upward.

5. The contactor position adjustment interlock device according to claim 3, characterized in that, The second connecting hole (230) is an oblong hole.

6. The contactor position adjustment interlock device according to claim 2, characterized in that, Includes a reset member (500), the third transmission member (300) is biased downward in response to the engagement of the first contactor (20), and the reset member (500) is reset in response to the disengagement of the first contactor (20).

7. The contactor position adjustment interlock device according to claim 6, characterized in that, The reset member (500) is a compression spring, and the third transmission member (300) has a second protrusion (320) and a third protrusion (330) for connecting to the compression spring respectively.

8. The contactor position adjustment interlock device according to claim 2, characterized in that, The third transmission member (300) has a fourth protrusion (340) for switching the auxiliary contact (40) on and off in response to the on / off state of the first contactor (20).

9. The contactor position adjustment interlock device according to claim 2, characterized in that, The housing (400) includes a first housing (410) and a second housing (420) that are interlocked with each other. The first housing (410) has a first clearance hole (411) for the horizontal portion (110) to extend out, and the second housing (420) has a second clearance hole (421) for the connecting portion (210) to extend out. The housing (400) has a connection structure for mounting with the first contactor (20) and the main interlocking device (10).

10. A contactor assembly, characterized in that, It includes a first contactor (20), a second contactor (30), a main interlock device (10), an auxiliary contact (40) connected to the first contactor (20), and a contactor position adjustment interlock device (50) according to any one of claims 1-9, wherein the contactor position adjustment interlock device (50) is connected between the first contactor (20) and the main interlock device (10), and the main interlock device (10) is connected between the contactor position adjustment interlock device (50) and the second contactor (30).

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