A three-element structure indoor post insulator

Abstract

The invention relates to an indoor support insulator having a three-element structure, wherein an upper accessory system is arranged at an upper end of the insulator, and a lower accessory system is arranged at a lower end of the insulator; and the upper and lower accessory systems are composed of upper and lower insulating parts and upper and lower conductive parts, and the insulating parts are in close contact with the conductive parts. The insulating parts of the upper and lower accessory systems are in contact with the upper and lower ends of the insulator; and the conductive parts of the upper and lower accessory systems are divided into a first conducting ring and a second conducting ring, the first conducting ring is arranged on a horizontal side surface of the upper accessory system that is in contact with the upper end of the insulator, and the second conducting ring is arranged on a vertical side surface of the lower accessory system that is in contact with the lower end of the insulator. According to the invention, when the electrode generates corona discharge, the charges of the corona discharge can be absorbed to effectively improve the initial corona voltage and the dry flashover voltage of the insulator; when the electrode generates surface discharge, the movement track of the discharge charges can be guided to prolong the discharge path and effectively improve the dry flashover voltage of the insulator; and the leakage current of the pollution layer on the surface of the insulator, the creepage distance is increased, and the pollution flashover is effectively inhibited.

Description

technical field [0001] The invention relates to a high-voltage indoor post insulator, in particular to an indoor post insulator 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. According to the different shape structure and working conditions, it can be divided into two categories: outdoor and indoor. General indoor post insulators are composed of hollow or solid cylindrical porcelain parts and metal accessories. According to the different metal accessories and glue-mounting methods, indoor post insulators are divided into three types: outer glue-mounted, inner glue-mounted and inner-inner glued-mounted structures. [0003] The metal accessories of the outer glue-mounted insulator are glue-mounted outside the porcelain part, and the metal accessories of the inner glue-mounted insulator are glue-mounted inside the porcelain part. The inte...

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Problems solved by technology

However, the anti-fouling flashover coating is a product of on-site construction, and there are problems such as difficult quality assurance, high material and labor consumption, and high price, so it can only be used as a temporary and remedial measure

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