Automatic change-over switch and dual-power supply system

Abstract

The utility model provides an automatic change-over switch and a dual-power supply system, and belongs to the technical field of electrical equipment. The utility model provides an automatic change-over switch. The automatic change-over switch comprises a shell and a contact system, an installation space is arranged in the shell, the shell is provided with a hollowed-out groove, and the hollowed-out groove is communicated with the installation space. The contact system is arranged in the installation space and comprises a rotating shaft. The hollowed-out groove is used for allowing an external testing fixture to extend into the installation space, so that the external testing fixture can abut against the rotating shaft to limit rotation of the rotating shaft. On the premise that the moving contact and the static contact do not need to be welded, the isolation function of the automatic change-over switch can be tested, the difficulty of the automatic change-over switch in the isolation function testing process can be reduced, and the isolation function testing cost of the automatic change-over switch can also be reduced.

Description

Technical Field

[0001] This application relates to the field of electrical equipment technology, and in particular to an automatic transfer switch and a dual power supply system. Background Technology

[0002] A dual-power supply system is a power supply system that provides power to a load through two independent power sources. Dual-power supply systems can improve power supply reliability and continuity. The installation of dual-power supply systems is particularly important in critical locations with extremely high requirements for power stability, such as hospitals, data centers, and defense facilities.

[0003] Automatic transfer switches are core devices in dual-power supply systems that ensure continuous power supply to critical loads. To guarantee the stable operation of the dual-power supply system, the isolation function of automatic transfer switches needs to be tested before leaving the factory. In existing technologies, the process of testing the isolation function of automatic transfer switches is quite difficult, resulting in high costs. Utility Model Content

[0004] This application provides an automatic transfer switch and a dual power supply system, which reduces the difficulty of testing the isolation function of the automatic transfer switch, thereby reducing the cost of testing the isolation function of the automatic transfer switch.

[0005] In a first aspect, this application provides an automatic transfer switch. The automatic transfer switch includes a housing and a contact system. The housing has an internal mounting space and a slot communicating with the mounting space. The contact system is disposed within the mounting space and includes a rotating shaft. The slot allows an external gauge to extend into the mounting space so that the external gauge can abut against the rotating shaft, restricting its rotation.

[0006] The above-described design incorporates a perforated slot that penetrates the housing and connects to the installation space, allowing the installation space to communicate with the outside environment. Since the contact system is located within the installation space, an external inspection fixture can extend into the space through the perforated slot and abut against the rotating shaft of the contact system. This external fixture can limit the rotation of the shaft, preventing it from turning, thus simulating the welded state between the moving and stationary contacts during the isolation function test of the automatic transfer switch. After the isolation function test of the automatic transfer switch is completed, the external fixture can be removed, allowing for free operation of the automatic transfer switch. This design enables the isolation function test of the automatic transfer switch without requiring welding between the moving and stationary contacts, preventing damage to them and reducing the difficulty and cost of testing the isolation function of the automatic transfer switch.

[0007] In one possible design, the housing includes a middle cover, and the mounting space includes a first receiving cavity located within the middle cover. A perforated slot includes a first perforated slot disposed on the middle cover and communicating with the first receiving cavity. A contact system portion is disposed within the first receiving cavity, and an external inspection tool can pass through the first perforated slot and abut against the rotating shaft.

[0008] With the above scheme, the first perforated slot communicates with the first receiving cavity, allowing the first receiving cavity to connect with the outside through the first perforated slot. Since a part of the contact system is located within the first receiving cavity, an external gauge can extend into the first receiving cavity through the first perforated slot and abut against the rotating shaft of the contact system. The external gauge can limit the rotation of the shaft, preventing it from rotating, thus simulating the welded state between the moving and stationary contacts during the isolation function test of the automatic transfer switch. After the automatic transfer switch completes the isolation function test, the external gauge can be removed, allowing free operation of the automatic transfer switch. This configuration allows for the isolation function test of the automatic transfer switch without requiring welding between the moving and stationary contacts.

[0009] In one possible design, the housing includes a top cover disposed on one side of the first cutout. The top cover is capable of shielding the first cutout.

[0010] Through the above design, the first perforated slot allows the interior of the automatic transfer switch to connect with the external environment. The top cover conceals the first perforated slot, reducing the likelihood of external dust or foreign objects entering the automatic transfer switch through it and damaging its internal components. This improves the reliability of the automatic transfer switch.

[0011] In one possible design, the middle cover has a first threaded hole on the side facing the upper cover, and the upper cover has a first mounting hole. The first mounting hole and the first threaded hole are positioned opposite each other, and a bolt can pass through the first mounting hole and the first threaded hole to fix the upper cover and the middle cover.

[0012] The above method, using bolts to fix the upper cover to the middle cover, not only ensures a more stable fixation of the upper cover, but also allows for easy removal of the upper cover from the middle cover by simply unscrewing the bolts when using the first perforated slot. This reduces the difficulty of removing the upper cover and lowers the challenges of testing the isolation function of the automatic transfer switch.

[0013] In one possible design, the middle cover has a first slot, and the upper cover has a first locking block. The first locking block corresponds to the position of the first slot, and the first locking block engages with the first slot.

[0014] The above solution utilizes the cooperation between the first locking block and the first locking slot to create a snap-fit ​​connection between the upper cover and the middle cover. This not only ensures a secure connection between the upper and middle covers but also facilitates easier installation and removal of the middle and upper covers. This reduces the difficulty of testing the isolation function of the automatic transfer switch and saves time during such testing.

[0015] In one possible design, the housing includes a base, and the mounting space includes a second receiving cavity located within the base. A second perforated slot is disposed on the base and communicates with the second receiving cavity. A contact system portion is disposed within the second receiving cavity, and an external inspection fixture can pass through the second perforated slot and abut against the rotating shaft.

[0016] With the above design, the second perforated groove penetrates the base and communicates with the second receiving cavity, allowing the second receiving cavity to connect with the outside through the perforated groove. Since part of the contact system is located within the second receiving cavity, an external gauge can extend into the second receiving cavity through the second perforated groove and abut against the rotating shaft of the contact system. The external gauge can limit the rotation of the shaft, preventing it from rotating, thus simulating the welded state between the moving and stationary contacts during the isolation function test of the automatic transfer switch. After the automatic transfer switch completes the isolation function test, the external gauge can be removed, allowing free operation of the automatic transfer switch. This configuration allows for the isolation function test of the automatic transfer switch without requiring welding between the moving and stationary contacts. Furthermore, during the isolation test of the automatic transfer switch, the gauge can be inserted into the installation space of the automatic transfer switch from either the middle cover or the base, reducing the steps required for position correction and thus reducing the difficulty of testing the isolation function, thereby lowering the cost of testing the isolation function of the automatic transfer switch.

[0017] In one possible design, the housing includes a base plate disposed on one side of the second cutout. The base plate is capable of shielding the second cutout.

[0018] Through the above design, the second perforated slot allows the interior of the automatic transfer switch to connect with the external environment. The base plate shields the second perforated slot, reducing the likelihood of external dust or foreign objects entering the automatic transfer switch through it and damaging its internal components. This improves the reliability of the automatic transfer switch.

[0019] In one possible design, the base has a second threaded hole on the side facing the base plate, and the base plate has a second mounting hole. The second mounting hole and the second threaded hole are positioned opposite each other, allowing bolts to pass through the second mounting hole and the second threaded hole to fix the base plate to the base.

[0020] The above method, which uses bolts to fix the base plate to the base, not only ensures a more stable fixation of the base plate, but also simplifies the removal of the base plate from the base by simply unscrewing the bolts when using the second perforated slot. This reduces the difficulty of disassembling the base plate and lowers the complexity of testing the isolation function of the automatic transfer switch.

[0021] In one possible design, the base has a second slot, and the base plate has a second locking block. The second locking block corresponds to the second slot. The second locking block engages within the second slot.

[0022] The above solution utilizes the cooperation between the second locking block and the second locking slot to create a snap-fit ​​connection between the base plate and the base. This not only ensures a stable connection between the base plate and the base but also facilitates easier installation and removal. This reduces the difficulty of testing the isolation function of the automatic transfer switch and saves time during such testing.

[0023] Secondly, this application provides a dual power supply system, which includes the automatic transfer switch mentioned in the first aspect above.

[0024] The beneficial effects of the dual power supply system provided in the second aspect above can be found in the first aspect and the beneficial effects of various possible implementations of the first aspect, and will not be repeated here. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the automatic transfer switch provided in an embodiment of this application from one viewpoint.

[0026] Figure 2 This is a cross-sectional view of an automatic transfer switch provided in an embodiment of this application.

[0027] Figure 3 This is a schematic diagram of the automatic transfer switch provided in this application embodiment after the top cover has been removed.

[0028] Figure 4 This is a schematic diagram of the automatic transfer switch provided in this application embodiment after the base plate has been removed.

[0029] Figure 5 This is a schematic diagram of the automatic transfer switch provided in an embodiment of this application from another perspective.

[0030] Explanation of reference numerals in the attached figures:

[0031] 100. Base; 110. Second hollowed-out groove;

[0032] 200. Contact system; 210. Rotating shaft; 220. Moving contact; 221. First end; 222. Second end; 230. First stationary contact; 240. Second stationary contact; 250. Third stationary contact;

[0033] 300. Middle cover; 310. First hollowed-out groove;

[0034] 400, top cover;

[0035] 500, base plate. Detailed Implementation

[0036] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0037] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used herein in the specification of the application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.

[0038] The terms "comprising" and "having," and any variations thereof, used in the specification, claims, and drawings of this application are intended to cover without excluding other meanings. The words "a" or "an" do not exclude the presence of multiples.

[0039] The term "embodiment" as used herein means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of the phrase "embodiment" in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0040] In this article, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, the character " / " in this article generally indicates that the preceding and following related objects have an "or" relationship.

[0041] The directional terms appearing in the following description refer to the directions shown in the figures and are not intended to limit the specific structure of this application. For example, in the description of this application, terms such as "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the figures. They are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0042] Furthermore, the terms "first," "second," etc., in the specification and claims of this application or in the aforementioned drawings are used to distinguish different objects rather than to describe a specific order, and may explicitly or implicitly include one or more of the features.

[0043] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, "connection" or "joining" in mechanical structures can refer to a physical connection. A physical connection can be a fixed connection, such as a connection secured by fasteners, such as a connection secured by screws, bolts, or other fasteners; a physical connection can also be a detachable connection, such as a snap-fit ​​or interlocking connection; a physical connection can also be an integral connection, such as a connection formed by welding, bonding, or integral molding. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0044] A dual-power supply system is a system that provides power to electrical equipment through two independent power sources. The core objective of a dual-power supply system is to ensure the continuity and reliability of power supply. A dual-power supply system includes an automatic transfer switch, which automatically switches to the backup power source when the main power source fails.

[0045] Automatic transfer switches typically undergo isolation function testing before leaving the factory. This is to verify the electrical isolation performance and operational reliability of the automatic transfer switch during power switching. In existing technology, testing the isolation function of automatic transfer switches requires welding the internal moving and stationary contacts together. This is not only difficult to operate but also can cause damage to the internal moving and stationary contacts, resulting in higher costs for testing the isolation function of automatic transfer switches.

[0046] To address the aforementioned problems, this application provides an automatic transfer switch and a dual power supply system. To enable those skilled in the art to better understand the solution of this application, the technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings.

[0047] Figure 1 This is a schematic diagram of the automatic transfer switch provided in an embodiment of this application from one viewpoint. Figure 2 This is a cross-sectional view of an automatic transfer switch provided in an embodiment of this application. Figure 3 This is a schematic diagram of the automatic transfer switch provided in an embodiment of this application after the top cover has been removed. Figures 1 to 3 As shown, the automatic changeover switch includes a housing and a contact system 200. The housing has an internal mounting space and a perforated groove communicating with the mounting space. The contact system 200 is disposed within the mounting space and includes a rotating shaft 210. The perforated groove allows an external inspection tool to extend into the mounting space, so that the external inspection tool can abut against the rotating shaft 210, restricting the rotation of the rotating shaft 210.

[0048] The housing includes a base 100 and a middle cover 300. The base 100 has a second receiving cavity and the middle cover 300 has a first receiving cavity. After the middle cover 300 and the base 100 are closed, the second receiving cavity and the first receiving cavity are connected to form an installation space. The contact system 200 of the automatic transfer switch can be installed in the installation space.

[0049] A perforated groove can be a through-slot structure created on the housing. The perforated groove can be integrally formed with the housing, or it can be added to the housing after it has been formed by grooving or engraving. The perforated groove allows the installation space of the automatic transfer switch to be connected to the outside environment.

[0050] The contact system 200 includes a rotating shaft 210, a moving contact 220, and a stationary contact. The rotating shaft 210 is rotatably disposed within the installation space, and the moving contact 220 is fixedly connected to the rotating shaft 210. The moving contact 220 includes a first end 221 and a second end 222 that are positioned opposite each other. The rotating shaft 210 is fixedly connected to the middle of the moving contact 220, and when the rotating shaft 210 rotates, the moving contact 220 can rotate together with the rotating shaft 210.

[0051] Automatic transfer switches commonly found on the market are classified by pole number as single-pole, double-pole, three-pole, and four-pole, etc. The number of stationary contacts also varies depending on the pole number of the automatic transfer switch, as shown in the appendix to this application. Figure 2Taking the automatic transfer switch shown as an example, there are three stationary contacts: a first stationary contact 230, a second stationary contact 240, and a third stationary contact 250. The first stationary contact 230 and the second stationary contact 240 can be located on one side of the installation space, and the third stationary contact 250 can be located on the other side of the installation space. The first stationary contact 230 can be mounted on the middle cover 300, and the second stationary contact 240 and the third stationary contact 250 can be mounted on the base 100. The first stationary contact 230 can be electrically connected to the main power supply, the second stationary contact 240 can be electrically connected to the backup power supply, and the third stationary contact 250 can be electrically connected to the load.

[0052] When the dual power supply system is in a power-off state, the moving contact 220 is not in contact with the stationary contact. When the dual power supply system is in the main circuit power supply state, the first end 221 of the moving contact 220 can contact the first stationary contact 230, and the second end 222 of the moving contact 220 can contact the third stationary contact 250. During the process of switching the dual power supply system from the main circuit power supply state to the standby circuit power supply state, the rotation of the shaft 210 can drive the moving contact 220 to rotate, causing the first end 221 to separate from the first stationary contact 230, and the second end 222 to separate from the third stationary contact 250. When the dual power supply system is in the standby circuit power supply state, the second end 222 of the moving contact 220 can contact the second stationary contact 240, and the first end 221 of the moving contact 220 can contact the third stationary contact 250.

[0053] When the dual power supply system is in the main circuit power supply state, or when the dual power supply system is in the standby circuit power supply state, an external inspection tool can enter the installation space through the cutout groove. The external inspection tool can be used to limit the rotating shaft 210, so that the rotating shaft 210 cannot rotate. This can simulate the state of welding between the moving contact 220 and the stationary contact when testing the isolation function of the automatic transfer switch.

[0054] In summary, the perforated slot penetrates the housing and communicates with the installation space, allowing the installation space to connect with the outside world. Because the contact system 200 is located within the installation space, an external inspection fixture can extend into the installation space through the perforated slot and abut against the rotating shaft 210 of the contact system 200. The external inspection fixture can limit the rotation of the shaft 210, preventing it from rotating. This simulates the welding state between the moving contact 220 and the stationary contact during the isolation function test of the automatic transfer switch. After the isolation function test of the automatic transfer switch is completed, the external inspection fixture can be removed, allowing free operation of the automatic transfer switch. This design allows for the isolation function test of the automatic transfer switch without requiring welding between the moving contact 220 and the stationary contact, thus preventing damage to the moving contact 220 and the stationary contact, reducing the difficulty of testing the isolation function of the automatic transfer switch, and consequently reducing the cost of testing the isolation function of the automatic transfer switch.

[0055] There are several ways to set up a hollow groove. Two of them are explained in detail below.

[0056] The first setting is as follows: Figures 1 to 3 As shown, the housing includes a middle cover 300, and the mounting space includes a first receiving cavity located within the middle cover 300. A perforated groove includes a first perforated groove 310, which is disposed on the middle cover 300 and communicates with the first receiving cavity. A contact system 200 is partially disposed within the first receiving cavity, and an external inspection tool can pass through the first perforated groove 310 and abut against the rotating shaft 210.

[0057] The first perforated groove 310 can be a through groove structure opened on the middle cover 300. The first perforated groove 310 can be integrally formed with the middle cover 300, or the first perforated groove 310 can be set on the middle cover 300 after the middle cover 300 is formed by grooving or carving. The first perforated groove 310 can connect the installation space of the automatic transfer switch with the outside.

[0058] Because the first perforated slot 310 penetrates the middle cover 300, it connects the installation space of the automatic transfer switch with the outside. In order to protect the internal components of the automatic transfer switch, such as... Figure 1 as well as Figure 3 As shown, the housing includes a top cover 400, which is disposed on one side of the first hollowed-out groove 310. The top cover 400 can cover the first hollowed-out groove 310.

[0059] The top cover 400 can be a plate-like structure. Since the first hollow groove 310 is located on the side of the middle cover 300 away from the base 100, in order to cover the first hollow groove 310, the top cover 400 can also be located on the side of the middle cover 300 away from the base 100.

[0060] The upper cover 400 and the middle cover 300 can be detachably connected. During normal use of the automatic transfer switch, the upper cover 400 can be installed on the middle cover 300 to cover the first perforated groove 310. When it is necessary to use an external gauge to limit the rotation shaft 210 by passing through the first perforated groove 310, the upper cover 400 can be removed from the middle cover 300. This avoids the upper cover 400 making the first perforated groove 310 unusable. When the upper cover 400 is installed on the middle cover 300, the side of the upper cover 400 facing the middle cover 300 can contact the side of the middle cover 300 away from the base 100, ensuring that the upper cover 400 and the part of the middle cover 300 without the first perforated groove 310 are flush. This not only improves the aesthetics of the automatic transfer switch but also reduces the probability of the automatic transfer switch being bumped or knocked during use due to the upper cover 400 protruding from the middle cover 300.

[0061] In summary, the first perforated slot 310 allows the interior of the automatic transfer switch to communicate with the external environment. The top cover 400 can shield the first perforated slot 310, thus reducing the probability of external dust or foreign objects entering the automatic transfer switch through the first perforated slot 310 and damaging its internal components. This improves the reliability of the automatic transfer switch.

[0062] There are several ways to connect the top cover 400 and the middle cover 300. The following describes two of these connection methods in detail with reference to the attached diagram.

[0063] The first connection method is as follows: Figure 1 and Figure 3 As shown, the middle cover 300 has a first threaded hole on the side facing the upper cover 400, and the upper cover 400 has a first mounting hole. The first mounting hole and the first threaded hole are opposite each other, and bolts can pass through the first mounting hole and the first threaded hole to fix the upper cover 400 and the middle cover 300 together.

[0064] The first threaded hole can be a blind hole structure arranged along the alignment direction of the middle cover 300 and the base 100, and the opening of the first threaded hole can face the upper cover 400. There can be one or more first threaded holes. The first threaded hole can be integrally formed with the middle cover 300, or the first threaded hole can be set on the middle cover 300 by means of an opening after the middle cover 300 is formed.

[0065] Accordingly, there can be one first mounting hole or multiple first mounting holes. The first mounting hole can be a through hole structure provided on the upper cover 400 along the arrangement direction of the middle cover 300 and the base 100. The first mounting hole can be integrally formed with the upper cover 400, or the first mounting hole can be provided on the middle cover 300 by means of opening after the upper cover 400 is formed.

[0066] When the upper cover 400 is mounted on the middle cover 300, the first mounting hole and the first threaded hole are aligned. At this time, by first passing a bolt through the first mounting hole and then threading it into the first threaded hole, the upper cover 400 can be fixed to the middle cover 300. When an external inspection tool needs to enter the automatic changeover switch through the first perforated slot 310, the upper cover 400 can be removed from the middle cover 300 after unscrewing the bolt.

[0067] When the first connection method is selected, the upper cover 400 is fixed to the middle cover 300 with bolts, which not only makes the fixation of the upper cover 400 more stable, but also, when using the first hollow slot 310, the upper cover 400 can be removed from the middle cover 300 simply by removing the bolts. This makes the removal of the upper cover 400 easier and reduces the difficulty of testing the isolation function of the automatic transfer switch.

[0068] Please refer to the second connection method. Figure 1 and Figure 3 As shown, the middle cover 300 is provided with a first slot, and the upper cover 400 is provided with a first locking block. The first locking block corresponds to the position of the first slot, and the first locking block is engaged in the first slot.

[0069] The first slot can be a recessed structure on the middle cover 300. The first slot can be a blind slot or a through slot. There can be one or more first slots. The first slot can be integrally formed with the middle cover 300, or it can be set on the middle cover 300 after it has been formed by carving or grooving.

[0070] The first locking block can be a protruding structure on the side of the upper cover 400 facing the middle cover 300, or the first locking block can be a hook structure on the side of the upper cover 400 facing the middle cover 300. There can be one or more first locking blocks. It should be noted that the number of first locking blocks should correspond to the number of first locking slots to avoid interference problems when the upper cover 400 is installed on the middle cover 300.

[0071] When the first slot is a blind slot, the first locking block can be a protruding structure. When the upper cover 400 is mounted on the middle cover 300, the first locking block is located within the first slot, and the first locking block and the first slot can be an interference fit. When the first slot is a through slot, the first locking block can be a hook structure. When the upper cover 400 is mounted on the middle cover 300, the hook of the first locking block can pass through the first slot and hook onto the side of the middle cover 300 opposite to the upper cover 400.

[0072] When the second connection method is selected, the engagement between the first locking block and the first locking slot allows the upper cover 400 and the middle cover 300 to form a snap-fit ​​connection. This not only ensures a secure connection between the upper cover 400 and the middle cover 300, but also makes the installation and removal of the middle cover 300 and the upper cover 400 more convenient. This reduces the difficulty of testing the isolation function of the automatic transfer switch and saves time costs during the isolation function test.

[0073] Because the base 100 of the automatic transfer switch may face the tester during isolation function testing, the switch's orientation needs to be corrected before the isolation test can be performed, making the process cumbersome. To address this issue, this application improves the base 100 of the isolation switch. The base 100 mentioned in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings.

[0074] Figure 4 This is a schematic diagram of the automatic transfer switch provided in an embodiment of this application after removing the base plate. The second configuration is as follows... Figures 2 to 4 As shown, the housing includes a base 100, and the mounting space includes a second receiving cavity located within the base 100. A perforated groove includes a second perforated groove 110, which is disposed on the base 100 and communicates with the second receiving cavity. A contact system 200 is partially disposed within the second receiving cavity, allowing an external inspection tool to pass through the second perforated groove 110 and abut against the rotating shaft 210.

[0075] The second hollow groove 110 has the same structure as the first hollow groove 310. The first hollow groove 310 has been described above, so the second hollow groove 110 will not be described again here.

[0076] In summary, when performing isolation tests on automatic transfer switches, the gauge can be inserted into the installation space of the automatic transfer switch from either the middle cover 300 or the base 100, reducing the steps required for position calibration of the automatic transfer switch. This reduces the difficulty of testing the isolation function of the automatic transfer switch and consequently lowers the cost of testing its isolation function.

[0077] As described above, the first stationary contact 230 can be installed on the middle cover 300, and the second stationary contact 240 and the third stationary contact 250 can be installed on the base 100. To facilitate the installation of the arc-extinguishing chamber, at least two first perforated slots 310 can be provided on the middle cover 300, and these two slots can be arranged opposite each other. That is, one first perforated slot 310 can be located on the side of the middle cover 300 near the first stationary contact 230, and the other first perforated slot 310 can be located on the side of the middle cover 300 near the third stationary contact 250. Correspondingly, at least two second perforated slots 110 can also be provided on the base 100, and these two second perforated slots 110 can be arranged opposite each other. That is, one second perforated slot 110 can be located on the side of the base 100 near the first stationary contact 230, and the other second perforated slot 110 can be located on the side of the base 100 near the third stationary contact 250.

[0078] Taking the above description as an example, two first hollow slots 310 can be a group, and two second hollow slots 110 can be a group. In actual use, automatic transfer switches usually connect multiple loads, which requires setting up multiple main power supplies and backup power supplies. In this case, each group of main power supplies and backup power supplies can be equipped with a group of first hollow slots 310 and a group of second hollow slots 110.

[0079] This configuration allows external gauges to be inserted into the installation space of the automatic transfer switch from either the first slot 310 or the second slot 110 of either the main power supply or the backup power supply to limit the rotation shaft 210, thereby improving the flexibility of the automatic transfer switch during isolation function testing. Furthermore, multiple external gauges can be used to extend into the installation space of the automatic transfer switch from multiple sets of the first slot 310 or the second slot 110 of the main power supply or the backup power supply to limit the rotation shaft 210. This enhances the effectiveness of the external gauges in limiting the rotation shaft 210, reduces the probability of contact failure between the external gauges and the rotation shaft 210, and improves the reliability of the automatic transfer switch during isolation function testing.

[0080] Figure 5 This is a schematic diagram of the automatic transfer switch provided in an embodiment of this application from another perspective. Because the second slot 110 penetrates the base 100, connecting the installation space of the automatic transfer switch to the outside, in order to protect the internal components of the automatic transfer switch, such as... Figure 2 as well as Figure 5 As shown, the housing includes a base plate 500, which is disposed on one side of the second cutout groove 110. The base plate 500 can shield the second cutout groove 110.

[0081] The base plate 500 can be a plate-shaped structure. Since the second hollow groove 110 is located on the side of the base 100 away from the middle cover 300, in order to cover the second hollow groove 110, the base plate 500 can also be located on the side of the base 100 away from the middle cover 300.

[0082] The base plate 500 and the base 100 can be detachably connected. During normal use of the automatic changeover switch, the base plate 500 can be installed on the base 100 to shield the second cutout groove 110. When it is necessary to use an external gauge to limit the rotation shaft 210 by passing through the second cutout groove 110, the base plate 500 can be removed from the base 100. This avoids the base plate 500 making the second cutout groove 110 unusable.

[0083] When the base plate 500 is mounted on the base 100, the side of the base plate 500 facing the base 100 can contact the side of the base 100 away from the middle cover 300. Furthermore, to facilitate the installation of the automatic transfer switch, when the base plate 500 is mounted on the base 100, the side of the base plate 500 away from the base 100 is flush with the portion of the base 100 without the second perforated groove 110. This not only improves the aesthetic appearance of the automatic transfer switch but also reduces the probability of the automatic transfer switch being bumped or knocked during use due to the base plate 500 protruding from the base 100.

[0084] In summary, the second perforated slot 110 allows the interior of the automatic transfer switch to connect with the external environment. The base plate 500 shields the second perforated slot 110, reducing the probability of external dust or foreign objects entering the automatic transfer switch through the slot and damaging its internal components. This improves the reliability of the automatic transfer switch.

[0085] There are several ways to connect the base plate 500 and the base 100. The following describes two of these connection methods in detail with reference to the attached diagram.

[0086] The first connection method is as follows: Figure 2 as well as Figure 5 As shown, the base 100 has a second threaded hole on the side facing the base plate 500, and the base plate 500 has a second mounting hole. The second mounting hole and the second threaded hole are opposite each other, and bolts can pass through the second mounting hole and the second threaded hole to fix the base plate 500 to the base 100.

[0087] The second threaded hole has the same structure as the first threaded hole, and the second mounting hole has the same structure as the first mounting hole. The first threaded hole and the first mounting hole have been described above and will not be repeated here.

[0088] When the base plate 500 is mounted on the base 100, the second mounting hole and the second threaded hole are aligned. At this time, the base plate 500 is fixed to the base 100 by first passing a bolt through the second mounting hole and then threading it into the second threaded hole. When an external inspection tool needs to enter the automatic selector switch through the second slot 110, the base plate 500 can be removed from the base 100 by unscrewing the bolt.

[0089] When using the first connection method, the base plate 500 is fixed to the base 100 with bolts, which not only makes the fixing of the base plate 500 more stable. When using the second hollow slot 110, the base plate 500 can be removed from the base 100 simply by removing the bolts. This makes the removal of the base plate 500 easier and reduces the difficulty of testing the isolation function of the automatic transfer switch.

[0090] Please refer to the second connection method. Figure 2 and Figure 5 As shown, the base 100 has a second slot, and the base plate 500 has a second locking block. The second locking block corresponds to the second slot. The second locking block engages with the second slot.

[0091] The second slot can be a groove structure provided on the base 100. The second slot can be a blind slot or a through slot. There can be one or more second slots. The second slot can be integrally formed with the base 100, or it can be set on the base 100 after it has been formed by carving or grooving.

[0092] The second locking block can be a protruding structure on the side of the base plate 500 facing the base 100, or it can be a hook structure on the side of the base plate 500 facing the base 100. There can be one or more second locking blocks. It should be noted that the number of second locking blocks should correspond to the number of second locking slots to avoid interference problems when the base plate 500 is installed on the base 100.

[0093] When the second slot is a blind slot, the second locking block can be a protruding structure. When the base plate 500 is mounted on the base 100, the second locking block is located within the second slot, and the second locking block and the second slot can be an interference fit. When the second slot is a through slot, the second locking block can be a hook structure. When the base plate 500 is mounted on the base 100, the hook bend of the second locking block can pass through the second slot and hook onto the side of the base 100 facing away from the base plate 500.

[0094] When the second connection method is selected, the cooperation between the second locking block and the second locking slot allows the base plate 500 and the base 100 to form a snap-fit ​​connection. This not only ensures a stable connection between the base plate 500 and the base 100, but also makes the installation and removal of the base plate 500 and the base 100 more convenient. This reduces the difficulty of testing the isolation function of the automatic transfer switch and saves time costs during the isolation function test.

[0095] like Figures 2 to 4 As shown, the automatic transfer switch also includes an arc-extinguishing chamber. The arc-extinguishing chamber is snapped into the first slot 310 and / or the second slot 110.

[0096] The arc-extinguishing chamber can be snapped into the first hollowed-out groove 310 and / or the second hollowed-out groove 110. When the arc-extinguishing chamber is snapped into the first hollowed-out groove 310, the upper cover 400, which is mounted on the middle cover 300, will not interfere with the arc-extinguishing chamber. When the arc-extinguishing chamber is snapped into the second hollowed-out groove 110, the bottom plate 500, which is mounted on the base 100, will also not interfere with the arc-extinguishing chamber.

[0097] In summary, the contact system 200 of the automatic transfer switch generates an electric arc when it is disconnected. The arc extinguishing chamber can accelerate the extinguishing of the arc, thereby improving the reliability of the automatic transfer switch.

Claims

1. An automatic transfer switch, characterized in that, include: The housing has an internal installation space, and the housing has a hollowed-out groove that communicates with the installation space; A contact system is disposed within the installation space, and the contact system includes a rotating shaft; The hollowed-out groove is used to allow external inspection tools to extend into the installation space so that the external inspection tools can abut against the rotating shaft and restrict the rotation of the rotating shaft.

2. The automatic transfer switch according to claim 1, characterized in that, The housing includes a middle cover, and the mounting space includes a first receiving cavity located within the middle cover; The hollowed-out groove includes a first hollowed-out groove, which is disposed on the middle cover and communicates with the first receiving cavity; The contact system is partially disposed within the first receiving cavity, and an external inspection tool can pass through the first hollowed-out groove and abut against the rotating shaft.

3. The automatic transfer switch according to claim 2, characterized in that, The housing includes a top cover, which is disposed on one side of the first hollowed-out groove; The top cover can cover the first hollowed-out groove.

4. The automatic transfer switch according to claim 3, characterized in that, The middle cover has a first threaded hole on the side facing the upper cover, and the upper cover has a first mounting hole; The first mounting hole and the first threaded hole are positioned opposite each other, and the bolt can pass through the first mounting hole and the first threaded hole to fix the upper cover and the middle cover.

5. The automatic transfer switch according to claim 3, characterized in that, The middle cover is provided with a first slot, and the upper cover is provided with a first block; The first card block corresponds to the position of the first card slot, and the first card block is engaged in the first card slot.

6. The automatic transfer switch according to claim 1, characterized in that, The housing includes a base, and the mounting space includes a second receiving cavity, which is located within the base; The hollowed-out groove includes a second hollowed-out groove, which is disposed on the base and communicates with the second receiving cavity; The contact system is partially disposed within the second receiving cavity, and an external inspection tool can pass through the second hollowed-out groove and abut against the rotating shaft.

7. The automatic transfer switch according to claim 6, characterized in that, The housing includes a bottom plate, which is disposed on one side of the second hollowed-out groove; The base plate can cover the second hollowed-out groove.

8. The automatic transfer switch according to claim 7, characterized in that, The base has a second threaded hole on the side facing the bottom plate, and the bottom plate has a second mounting hole; The second mounting hole and the second threaded hole are positioned opposite each other, and the bolt can pass through the second mounting hole and the second threaded hole to fix the base plate to the base.

9. The automatic transfer switch according to claim 7, characterized in that, The base is provided with a second slot, and the bottom plate is provided with a second locking block; The second card block corresponds to the position of the second card slot, and the second card block is engaged in the second card slot.

10. A dual-power supply system, characterized in that, The automatic transfer switch includes any one of claims 1 to 9.

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