Incoming/outgoing line inflation casing tube for high-voltage switch gear

Abstract

The invention discloses a charging bushing for a standby inlet-outlet wire of a high voltage switch device which comprises an isolating tube penetrated with a central conductor; the upper end of the isolating tube is connected with an outer screen; the lower end of the isolating tube is connected with GIS or the insulating salver of a breaker; the lower end of the central conductor is connected with a contact component on the GIS or the isolating salver of the breaker; the upper end of the central conductor is connected with an external inlet-outlet wire to form a main conductive loop; a coaxial double-layered screening component is arranged between the radical directions of the central conductor and the insulating tube; the invention is characterized in that the double-layered screening component is an integral arc screening structure which is connected with the closed ring of the isolating tube; the contact component connected with the lower end of the central conductor is a self-supported contact device. As the integral arc screening structure is adopted in the invention, the middle screening height is greatly reduced; the rigidity of the screening component is increased and the distribution of an electric field at the tail end of the screen is improved. Simultaneously the self-supported contact device is adopted; the discharge current capability is greatly improved; the structure is very simple; the manufacture cost is reduced.

Description

technical field [0001] The invention relates to a component for high-voltage switchgear, which is an inflatable sleeve used for incoming and outgoing lines in tank circuit breakers and gas-insulated metal-enclosed switchgear (GIS), especially an inflatable sleeve for incoming and outgoing lines with a voltage level above 550kV Tube. Background technique [0002] Inlet and outlet gas bushings are components often used in tank circuit breakers and gas-insulated metal-enclosed switchgear (GIS), and their function is to introduce high voltage and high current into or out of related equipment through this component. [0003] In the past, the inner shielding design of the inflatable sleeve mainly has two forms: one is to use single-layer shielding (ground shielding), which is mainly used for low voltage levels; the other is to use double-layer shielding (ground shielding + intermediate shielding) , and the separation and connection between the two shields are realized through a s...

AI Technical Summary

Problems solved by technology

The problems with this structure are: first, when a large current is passed, it is difficult to design and manufacture; second, there are a large number and types of parts, and when a large current is passed, it usually involves 4 to 6 kinds of about 50 to 70 parts , production organization and assembly are difficult, low efficiency and high cost

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