Indoor high-voltage alternating-current vacuum load switch-fuse combined electric appliance
By integrating the fuse barrel and high-pressure sensor in the vacuum load switch, the problems of complex structure and high cost in the prior art are solved, and better performance and lower costs are achieved.
Patent Information
- Application Number
- CN202422355134.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-26
- Publication Date
- 2025-08-15
- Estimated Expiration
- 2034-09-26
AI Technical Summary
The existing indoor high-voltage AC vacuum load switch-fuse combination electrical appliances have a complex structure and require three sets of external high-voltage sensors to connect to copper strips, which takes up a large space and is costly.
The fuse barrel is set in the insulator of the vacuum load switch, and the high-voltage sensor is integrated on the solid sealing pole column, eliminating the connection between external sensors and copper rows, and adopting an up and down layout of inlet and outlet lines, which conforms to the traditional switch cabinet layout and simplifies the structure.
Reduces manufacturing costs, reduces loop resistance, improves overall performance, and saves installation space and labor costs.
Smart Images
Figure CN223230301U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of switch equipment, in particular to an indoor high-voltage AC vacuum load switch-fuse combination appliance. Background Art
[0002] High-voltage load switches are primarily used to control high-current switching in circuits. They can be used in conjunction with fuses to quickly cut off circuits in the event of abnormal conditions, such as circuit overload or short circuit, to protect electrical equipment and personnel. However, high-voltage load switches can usually only operate for short periods of time and cannot withstand continuous operation below the rated current.
[0003] In the prior art, indoor high-voltage AC vacuum load switch-fuse combination electrical appliances include a mounting frame, an operating mechanism, a vacuum load switch, an isolating switch, a high-voltage sensor, and other components. The vacuum load switch is fixedly connected to the mounting frame, one end of the fuse is connected to the vacuum load switch, and the other end of the fuse is connected to the high-voltage sensor, which is then connected to the copper busbar at the incoming line. A disadvantage of this load switch structure is that a connecting copper busbar is required between the outgoing line of the fuse and the high-voltage sensor to connect the high-voltage sensor. Three such high-voltage sensors are required in the load switch, and correspondingly, three copper busbars are required for connection. This complex structure requires a large space and is costly to manufacture, thus requiring improvement. Summary of the Invention
[0004] The purpose of the present utility model is to provide an indoor high-voltage AC vacuum load switch-fuse combination electrical appliance that can solve the problems of the existing new indoor high-voltage AC vacuum load switch-fuse combination electrical appliance described in the background technology, which requires the installation of three sets of external epoxy resin-encapsulated cylindrical high-voltage sensors and the connection of copper bars between the high-voltage sensors and the emerging ends of the fuse barrel, resulting in a complex structure, the need to occupy a large space, and the high cost.
[0005] To achieve the above objectives, the present invention is implemented through the following technical solutions: an indoor high-voltage AC vacuum load switch-fuse combination electrical appliance, comprising a mounting frame, an operating mechanism, a vacuum load switch, a fuse cartridge, an isolating switch assembly and a grounding switch assembly. The vacuum load switch, the fuse cartridge, the isolating switch assembly and the grounding switch assembly are each provided in three groups. The operating mechanism, the vacuum load switch, the isolating switch assembly and the grounding switch assembly are respectively provided on the mounting frame, characterized in that: the fuse cartridge is semi-sealed in the insulator of the vacuum load switch, the end of the fuse cartridge located in the insulating shell is connected to the static contact of the vacuum load switch, and the end of the fuse cartridge located outside the insulating shell is connected to the connector on the copper busbar at the incoming line end. A mounting seat is provided in the middle of the vacuum load switch, and the vacuum load switch is fixedly connected to the mounting frame through the mounting seat. A high-voltage sensor is provided in the insulating layer of the vacuum load switch, and a wiring terminal is provided on the mounting seat. The wiring terminal is electrically connected to the high-voltage sensor, and the wiring terminal is used to connect external circuit components.
[0006] In this solution, the operating mechanism is horizontally positioned in the middle of the mounting frame, with the operating mechanism's main shaft, isolation operating shaft, and grounding operating shaft positioned along the mounting frame's front and rear directions. This arrangement creates a vertical layout for incoming and outgoing cables, with the incoming copper busbar positioned above the mounting frame and the outgoing copper busbar below. This configuration better aligns with the layout of traditional switchgear, facilitates switch installation, and reduces labor costs.
[0007] In the above solution, three sets of main shaft crank arms are provided on the main shaft, and the three sets of main shaft crank arms are movably connected to the moving contacts of the outlet end of the vacuum load switch through the first insulating pull rod and the connecting rod respectively.
[0008] In the above scheme, three groups of isolation crank arms are provided on the isolation operating shaft, and the three groups of isolation crank arms are movably connected to the connecting part in the middle of the isolation knife switch through the second insulating pull rod. One end of the isolation knife switch is movably connected to the copper busbar at the outgoing end of the vacuum load switch, and the other end of the isolation knife switch is the isolation opening and closing end, which corresponds to the outgoing end copper busbar set on the mounting frame. When the isolation switch is closed, the three groups of isolation knife switches rotate to the isolation opening and closing end and are electrically connected to the outgoing end copper busbar.
[0009] In the above scheme, three groups of grounding switches are connected to the grounding operating shaft, and the free ends of the three groups of grounding switches are provided with grounding opening and closing terminals. The grounding opening and closing terminals of the three groups of grounding switches respectively correspond to the copper busbars at the incoming line end. When the grounding switch is closed, the three groups of grounding switches rotate to be electrically connected to the copper busbars at the incoming line end.
[0010] In the above solution, the outlet copper bus is fixedly connected to the mounting frame via corresponding insulating mounting posts.
[0011] In the above solution, a shielding ring is further provided in the insulating layer of the vacuum load switch. The shielding ring can shield electromagnetic signals. The shielding ring is preferably provided in the middle of the vacuum load switch, near the mounting seat.
[0012] The utility model has positive effects: the indoor high-voltage AC vacuum load switch-fuse combination appliance of the utility model is provided with a high-voltage sensor inside the sealed pole of the vacuum load switch, and a wiring terminal is provided on the mounting base of the vacuum load switch, the wiring terminal is electrically connected to the high-voltage sensor, and the wiring terminal is used to connect external circuit components. With this arrangement, there is no need to install three separate high-voltage sensors, and the copper busbar for connecting the high-voltage sensors is omitted; a fuse barrel is provided on the sealed pole, and the fuse can be installed inside the sealed pole, and the fuse is directly connected to the vacuum interrupter of the vacuum load switch through the fuse base. This structure integrates the vacuum load switch, the high-voltage sensor, and the fuse barrel into one component, greatly reducing the manufacturing cost of the load switch, and this structure can greatly reduce the loop resistance, making the overall performance better. BRIEF DESCRIPTION OF THE DRAWINGS
[0013] Figure 1 This is a structural diagram of the load switch of the present utility model (grounded state).
[0014] Figure 2 This is a structural diagram of the load switch of the utility model (isolated state).
[0015] Figure 3 This is a schematic cross-sectional view of the vacuum load switch of the present invention.
[0016] The accompanying drawings are marked as follows: mounting frame 1, operating mechanism 2, vacuum interrupter 3, fuse 4, incoming copper busbar 5, connector 6, mounting base 7, high-voltage sensor 8, terminal 9, first insulating pull rod 10, moving contact 11, isolating arm 12, second insulating pull rod 13, isolating knife switch 14, outgoing copper busbar 15, insulating mounting column 16, grounding knife switch 17, shielding ring 18. DETAILED DESCRIPTION
[0017] The following examples clearly and completely describe the technical solutions of the present invention. Obviously, the examples described are only a portion of the embodiments of the present invention, not all of them. Based on the examples of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative effort are within the scope of protection of the present invention.
[0018] like Figure 1-2An indoor high-voltage AC vacuum load switch-fuse combination electrical appliance shown includes a mounting frame 1, an operating mechanism 2, a vacuum load switch, a fuse cartridge 4, an isolating switch assembly, and a grounding switch assembly. The vacuum load switch, fuse cartridge 4, isolating switch assembly, and grounding switch assembly are each arranged in three groups. The operating mechanism 2, vacuum load switch, isolating switch assembly, and grounding switch assembly are separately arranged on the mounting frame 1.
[0019] The vacuum load switch is an epoxy resin-sealed vacuum load switch, in which a vacuum interrupter 3 and a fuse tube 4 are arranged.
[0020] The fuse barrel 4 is semi-sealed in the insulator of the vacuum load switch. One end of the fuse barrel 4 located inside the insulating shell is connected to the static contact of the vacuum load switch, and the other end of the fuse barrel 4 located outside the insulating shell is electrically connected to the connector 6 on the copper bus 5 at the incoming line end.
[0021] like Figure 3 As shown, a mounting base 7 is provided in the middle of the vacuum load switch, and the vacuum load switch is fixedly connected to the mounting frame 1 through the mounting base 7. A high-voltage sensor 8 is provided in the insulating layer of the vacuum load switch, and a wiring terminal 9 is provided on the mounting base 7. The wiring terminal 9 is electrically connected to the high-voltage sensor 8 and is used to connect external circuit components.
[0022] A shielding ring 18 may also be provided in the insulating layer of the vacuum load switch. The shielding ring 18 can shield electromagnetic signals. The shielding ring 18 is preferably provided in the middle of the vacuum load switch, close to the position of the mounting seat 7.
[0023] The operating mechanism 2 can adopt the existing load switch operating mechanism, in which components such as a closing operating mechanism, an opening operating mechanism, and a three-position operating mechanism are set.
[0024] Preferably, the operating mechanism is horizontally arranged in the middle of the mounting frame 2 , and the main shaft, the isolation operating shaft and the grounding operating shaft of the operating mechanism 2 are respectively arranged along the front-to-back direction of the mounting frame 1 .
[0025] As attached Figure 1 As shown, the main shaft can be set at the lower left side of the operating mechanism 2 and at the left side of the vacuum load switch. Three sets of main shaft crank arms are provided on the main shaft. The three sets of main shaft crank arms are respectively movably connected to the moving contact 11 of the outlet end of the vacuum load switch through the first insulating pull rod 10 and the connecting rod.
[0026] The isolation operating shaft can be set at the lower right side of the operating mechanism. Three groups of isolation crank arms 12 are provided on the isolation operating shaft. The three groups of isolation crank arms 12 are movably connected to the connecting part in the middle of the isolation knife switch 14 through the second insulating pull rod 13. One end of the isolation knife switch 14 is movably connected to the copper busbar at the outgoing end of the vacuum load switch. The other end of the isolation knife switch 14 is the isolation opening and closing end. The isolation opening and closing end corresponds to the outgoing end copper busbar 15 set on the mounting frame 1. When the isolation switch is closed, the three groups of isolation knife switches rotate to the isolation opening and closing end and are electrically connected to the outgoing end copper busbar 15. The outgoing end copper busbar 15 is fixedly connected to the mounting frame 1 through the corresponding insulating mounting column 16.
[0027] The grounding operating shaft can be set in the upper middle position of the operating mechanism 2 and is located on the right side of the fuse barrel 4. Three groups of grounding switches 17 are connected to the grounding operating shaft. The free ends of the three groups of grounding switches 17 are provided with grounding opening and closing terminals. The grounding opening and closing terminals of the three groups of grounding switches respectively correspond to the incoming copper busbar 5. When the grounding switch is closed, the three groups of grounding switches rotate to be electrically connected to the incoming copper busbar 5.
[0028] The utility model of indoor high-voltage AC vacuum load switch-fuse combination electrical appliance, when in use, the copper bar 5 at the incoming line end and the copper bar 15 at the outgoing line end are respectively connected to the corresponding lines, the grounding knife switch is grounded, and the load switch can be manually operated to close or open or operate in three positions. The principle is the same as that of the load switch in the prior art and will not be described in detail here. The load switch of the utility model has an operating mechanism 2 horizontally arranged in the middle of the mounting frame 1, the incoming line end is arranged on the upper side of the operating mechanism, and the outgoing line end is arranged on the lower side of the operating mechanism. Through this arrangement, when installed in the switch cabinet, the layout is simple, and the incoming and outgoing lines are changed to an upper and lower structure. This arrangement is more in line with the layout of the traditional switch cabinet, is more conducive to the hoisting of the switch, and saves labor costs.
[0029] The utility model relates to an indoor high-voltage AC vacuum load switch-fuse combination appliance. A high-voltage sensor is provided inside the sealed pole of the vacuum load switch. A terminal block is provided on the mounting base of the vacuum load switch. The terminal block is electrically connected to the high-voltage sensor and is used to connect external circuit components. This arrangement eliminates the need to install three separate high-voltage sensors and eliminates the need for copper busbars for connecting the high-voltage sensors. A fuse cartridge is provided on the sealed pole. The fuse can be installed inside the sealed pole. The fuse is directly connected to the vacuum interrupter of the vacuum load switch through the fuse base. This structure integrates the vacuum load switch, high-voltage sensor, and fuse cartridge into one component, greatly reducing the manufacturing cost of the load switch. In addition, this structure can significantly reduce the loop resistance, resulting in better overall performance.
[0030] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the scope and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.
Claims
1. An indoor high-voltage AC vacuum load switch-fuse combination appliance, comprising a mounting frame, an operating mechanism, a vacuum load switch, a fuse cartridge, an isolating switch assembly, and a grounding switch assembly. The vacuum load switch, fuse cartridge, isolating switch assembly, and grounding switch assembly are each provided in three groups. The operating mechanism, vacuum load switch, isolating switch assembly, and grounding switch assembly are separately provided on the mounting frame. The invention is characterized in that: A fuse cartridge, a vacuum interrupter, and a high-voltage sensor are integrated in the vacuum load switch. The fuse cartridge is semi-sealed in the insulator of the vacuum load switch. One end of the fuse cartridge located in the insulating shell is connected to the static contact of the vacuum load switch, and the other end of the fuse cartridge located outside the insulating shell is connected to the connector on the copper busbar at the incoming line end. The high-voltage sensor is arranged in the insulating layer of the vacuum load switch. A mounting seat is provided in the middle of the vacuum load switch. The vacuum load switch is fixedly connected to the mounting frame through the mounting seat. A wiring terminal is provided on the mounting seat. The wiring terminal is electrically connected to the high-voltage sensor and is used to connect external circuit components.
2. The indoor high-voltage AC vacuum load switch-fuse combination electrical appliance according to claim 1, characterized in that: The operating mechanism is horizontally arranged in the middle of the mounting frame, and the main shaft, the isolation operating shaft and the grounding operating shaft of the operating mechanism are respectively arranged along the front and rear directions of the mounting frame.
3. The indoor high-voltage AC vacuum load switch-fuse combination electrical appliance according to claim 2, characterized in that: The main shaft is provided with three groups of main shaft crank arms, and the three groups of main shaft crank arms are respectively and movably connected to the moving contacts of the outlet end of the vacuum load switch through the first insulating pull rod and the connecting rod.
4. The indoor high-voltage AC vacuum load switch-fuse combination electrical appliance according to claim 2, characterized in that: Three groups of isolation crank arms are provided on the isolation operating shaft, and the three groups of isolation crank arms are movably connected to the connecting part in the middle of the isolation knife switch through the second insulating pull rod. One end of the isolation knife switch is movably connected to the copper busbar at the outgoing end of the vacuum load switch, and the other end of the isolation knife switch is the isolation opening and closing end, which corresponds to the outgoing end copper busbar set on the mounting frame. When the isolation switch is closed, the three groups of isolation knife switches rotate to the isolation opening and closing ends and are electrically connected to the outgoing end copper busbar.
5. The indoor high-voltage AC vacuum load switch-fuse combination electrical appliance according to claim 2, characterized in that: Three groups of grounding switches are connected to the grounding operating shaft. The free ends of the three groups of grounding switches are provided with grounding opening and closing terminals. The grounding opening and closing terminals of the three groups of grounding switches respectively correspond to the copper busbars at the incoming line end. When the grounding switch is closed, the three groups of grounding switches rotate to be electrically connected to the copper busbars at the incoming line end.
6. The indoor high-voltage AC vacuum load switch-fuse combination electrical appliance according to claim 4, characterized in that: The outlet copper bus is fixedly connected to the mounting frame via corresponding insulating mounting posts.
7. The indoor high-voltage AC vacuum load switch-fuse combination electrical appliance according to claim 1, characterized in that: A shielding ring is also provided in the insulating layer of the vacuum load switch.