Handle of oil-immersed fuse used for American-type box substation

Abstract

The invention discloses a handle of an oil-immersed fuse used for an American-type box substation, which can improve the sealing performance and increase the creepage distance. The oil-immersed fuse comprises a cylindrical base, a fuse holder and a fuse element, wherein the base comprises an outer shell, and two conducting rings and a mounting base which are arranged in the outer shell at intervals; the fuse holder comprises the handle, and two contact pins connected with two ends of the fuse element respectively; one of the two contact pins is connected with the handle; the handle comprises a connecting rod, a cover, a knob, a sealing structure and a sealing ring which are connected with one another in turn; the sealing structure is arranged on the connecting rod, is close to one end of the cover, is a section of cylinder which is formed by extending the surface of the connecting rod in the radial direction; the peripheral surface of the cylinder is provided with an annular groove inthe radial direction; the diameter of the sealing structure is matched with the inside diameter of the base; the sealing ring is embedded in the groove of the sealing structure; and the cross sectionof the connecting rod of the handle is round, and a plurality of layers of umbrella ridges are protruded on the peripheral surface of the handle in the radial direction at intervals along the length direction.

Description

technical field [0001] The invention relates to a handle used on an oil-immersed fuse of an American box-type substation. Background technique [0002] According to the installation form, the fuses are divided into plug-in type and oil-immersed busbar type, and according to the installation environment medium, there are atmosphere, transformer oil, etc. Generally, plug-in fuses are inserted vertically and installed in the atmosphere. The installation size is required to be large, resulting in a large overall size of the transformer. The oil-immersed busbar fuse needs to be replaced when the transformer box is opened and the transformer oil is extracted. The replacement is troublesome, and the insulation of the transformer oil is lost or reduced. Oil-immersed transformer overload protection high-voltage fuse is suitable for overload protection of power transformers in American box-type transformers, and is a very important electrical component in American-style box-type tran...

AI Technical Summary

Problems solved by technology

At present, the sealing performance of the fuse handle and the contact part of the base has not been well resolved, and most fuses have such safety hazards in the working process

In addition, the cross-section of the connecting rod 33 is cross-shaped, although it can meet the operating strength, but this structure makes the creepage distance of the fuse relative to the ground only limited to the length L of the connecting rod, so there is a defect that the insulation distance cannot be lengthened

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