Vertical flat-mounted high-voltage load switch-fuse combination

Abstract

The present invention discloses a vertical flush-type high voltage load switch-fuse-combination unit. The vertical flush-type high voltage load switch-fuse-combination unit comprises a frame, an isolation switch, a load switch, an earth switch and a fuse. The upper pivot of the frame is provided with an isolated shaft, a load shaft and an earth shaft; an installation framework is arranged at the top of the frame; an installation hole is arranged on the installation framework; the load switch is provided with three epoxy polar columns which are projected towards the periphery of the load switch to form flanges; the flanges on the three epoxy polar columns are arranged side by side to commonly form an isolating partition matching the installation hole on the installation framework; each epoxy polar column is internally provided with a vacuum explosion chamber; and the upper end of the vacuum explosion chamber is connected with the isolation switch, the lower end of the vacuum explosion chamber is connected with the upper end of the fuse, and the lower end of the fuse is connected with the earth switch. The vertical flush-type high voltage load switch-fuse-combination unit employs a vertical flush-type mode to facilitate installation and improve the stability of a whole device; and moreover, after the flat stitching of the combination unit is completed, the vertical flush-type high voltage load switch-fuse-combination unit does not need individually made busbar chamber and a switch chamber and has high manufacture efficiency.

Description

technical field [0001] The invention relates to the technical field of electrical equipment, in particular to a vertical flat-mounted high-voltage load switch-fuse combined electrical appliance. Background technique [0002] Chinese patent document CN203312690U discloses a combined electrical appliance with functions of isolation, load, fusing, and grounding. One side is assembled and fixed on the side wall of the rack or the side wall of the switch cabinet. The existing switch cabinet is relatively wide, and the existing combined electrical appliances are relatively slender. Limited by the volume and height of the combined electrical appliances, the existing combined electrical appliances are usually only Side-mounted fixed installation can be adopted. This side loading method has the following disadvantages and deficiencies: [0003] 1. Since the existing combined electrical appliances are relatively slender as a whole, the gravity of the combined electrical appliances i...

AI Technical Summary

Problems solved by technology

[0002] Chinese patent document CN203312690U discloses a combined electrical appliance with functions of isolation, load, fusing, and grounding. One side is assembled and fixed on the side wall of the rack or the side wall of the switch cabinet. The existing switch cabinet is relatively wide, and the existing combined electrical appliances are relatively slender. Limited by the volume and height of the combined electrical appliances, the existing combined electrical appliances are usually only Can be installed side-mounted

[0003] 1. Since the existing combined electrical appliances are relatively slender as a whole, the gravity of the combined electrical appliances is relatively concentrated, and the side-mounted method will cause the combined electrical appliances to be concentrated on one side of the switch cabinet, which will cause uneven force distribution on the switch cabinet and affect the overall Device Stability

[0004] 2. Due to the heavy combined electrical appliances, the side-mounted combined electrical appliances will cause deformation of the switch cabinet, and the operating holes on the door of the switch cabinet and the operating holes on the operating mechanism cannot be matched accurately, so that the operation on the operating mechanism cannot be performed. The operating hole on the switch cabinet door cannot be used to control the combined electrical appliances. In the prior art, in order to align the operation hole on the switch cabinet door with the operation hole on the operating mechanism, the operation hole on the switch cabinet door is usually enlarged, which will Further reduce the strength of the switchgear door, which will reduce the strength and stability of the switchgear

[0006] 4. After the side installation of the combined electrical appliances is completed, it is necessary to make and install the insulating partitions of the busbar room and the switch room. The assembly process is complicated and the manufacturing efficiency is low.

[0007] In the above-mentioned Chinese patent document CN203312690U, a combined electrical appliance with isolation, load, fusing, and grounding functions is disclosed. The pole uses a solid sealing method to seal the vacuum interrupter in the pole. Complicated manufacture of combined electrical appliances and low manufacturing efficiency. On the other hand, the solid sealing process is difficult, which will cause unqualified solid sealing, which not only reduces the qualified rate of products, causes waste, but also brings safety hazards. In addition, the existing technology vacuum The interrupter also needs to be vulcanized, which further increases the difficulty of the operation and complicates the process

In addition, the use of solid sealing will make the vacuum interrupter slender, increase the height of the combined electrical appliances, and increase the volume of the switchgear. Since the upper and lower contacts of the vacuum interrupter are thin, it is not convenient to fuse The connection between the device and the isolating switch increases the difficulty of assembly

[0008] Chinese patent document CN203312690U discloses a combined electrical appliance with functions of isolation, load, fusing and grounding. The overall length of combined electrical appliances is long and the structure is loose, which will increase the volume of the switchgear. In addition, the fuse is connected to the frame through insulators. The connection method is complicated and the assembly is difficult.

[0009] Chinese patent document CN203312690U discloses a combined electrical appliance with isolation, load, fusing and grounding functions. In this technical solution, three fuse support bases 101 are respectively connected to the frame 1 through three insulators 102, and the three fuse support bases The lower end of 101 is equipped with a tool clip that matches the grounding knife switch 81. This method of using insulators to fix the fuse and the grounding tool clip has a complicated structure, and it will also increase the height, volume and weight of the combined electrical appliance, making assembly difficult.

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