A three-element structure outdoor post insulator post

Abstract

The invention relates to an outdoor support insulating sub-column having a three-element structure. A high voltage electrode accessory system is arranged on a high voltage electrode of an upper insulator, an intermediate electrode accessory system is arranged at an electrode connecting site of the upper insulator and a lower insulator, a grounding electrode accessory system is arranged on a grounding electrode of the lower insulator, and a grounding electrode auxiliary system is arranged in the vicinity of the grounding electrode. The intermediate electrode accessory system is composed of an upper accessory system, an upper auxiliary system, a lower accessory system and a combination part accessory system arranged on a combination part of the upper and lower insulators. Each accessory system is composed of an insulating part and a conductive part, and the insulating part is in close contact with the conductive part. According to the invention, the probability of generating corona discharge is eliminated, and the initial corona voltage and the dry flashover voltage are improved; the direct irradiation of ultraviolet rays on the sheds are shielded, thereby delaying the ageing of the sheds; the rain water is shielded, thereby improving the wet flashover voltages of the insulators; the pollution accumulation is reduced, so the pollution flashover probability is reduced; and the pollution flashover voltages of the insulators are improved.

Description

technical field [0001] The invention relates to a high-voltage outdoor post insulator column, in particular to an outdoor post insulator column with a three-element structure. Background technique [0002] Post insulators are insulating posts that support high-voltage busbars and live parts of high-voltage electrical appliances. It is made of porcelain pillars and upper and lower metal accessories through cement glue. According to the different shape structure and working conditions, it can be divided into two categories: outdoor and outdoor. The post insulators of general outdoor installations adopt a large number of rod-shaped structures, that is, solid round porcelain columns with umbrellas. For 154kV and higher voltage levels, several post insulators are commonly used to assemble insulator posts. Figure 7 It is an insulator column assembled in series by two high-voltage outdoor post insulators. The lower electrode of the upper insulator and the upper electrode of the ...

AI Technical Summary

Problems solved by technology

[0009] The lightning impulse voltage of outdoor post insulators is also an important indicator of the external insulation level, and it is very difficult to increase the lightning impulse voltage of insulators after they leave the factory.

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