Metal closed solid insulation pole-mounted vacuum switch

Abstract

The invention relates to a metal closed solid insulation pole-mounted vacuum switch. The metal closed solid insulation pole-mounted vacuum switch comprises a box body and three phase poles. A front wall plate and a rear wall plate of the box body are respectively provided with two phase bent outgoing line casing pipes and a phase straight outgoing line casing pipe. Each straight outgoing line casing pipe and each bent outgoing line casing pipe are respectively composed of an insulation sleeve and a conductive rod located at the center of the insulation sleeve. One end of each straight outgoing line casing pipe and one end of each bent outgoing line casing pipe are located in the box body and connected with the end portions of the poles. The other end of each straight outgoing line casing pipe and the other end of each bent outgoing line casing pipe are located on the outer sides of the wall plates of the box body. The middle of the straight outgoing line casing pipes and the middle of the bent outgoing line casing pipes are fixedly installed on the wall plates of the box body. The straight outgoing line casing pipes are connected with the phase pole in the middle. The center lines of the straight outgoing line casing pipes are straight. The bent outgoing line casing pipes are connected with two phase poles on the two sides, and the center lines located on the outer side portions of the box body are bent towards the direction away from the straight outgoing line casing pipes. According to the metal closed solid insulation pole-mounted vacuum switch, high insulation capacity is guaranteed, the environmental problem caused by SF6 gas insulation is solved, and the requirement for air tightness of the box body is reduced.

Description

technical field [0001] The invention relates to a power distribution switchgear in a power system, in particular to a metal-enclosed vacuum switch on a solid insulating post. Background technique [0002] In the distribution network, the overhead line is to install the switch on the pole. This type of switch is called a switch on the pole. At present, a variety of switches on the pole are used in the distribution network. With the development of power systems and the improvement of power supply reliability, the full insulation of overhead lines is a development trend. At present, miniaturized vacuum switches with metal sealing are being widely promoted and used. However, the existing small metal sealing Due to the small internal space of the vacuum switch on the column, SF6 gas is used as the insulating medium to enhance the internal insulation strength, which puts forward higher requirements on the sealing of the metal shell, so it is prone to insulation failure caused by S...

AI Technical Summary

Problems solved by technology

With the development of power systems and the improvement of power supply reliability, the full insulation of overhead lines is a development trend. At present, miniaturized vacuum switches with metal sealing are being widely promoted and used. However, the existing small metal sealing Due to the small internal space of the vacuum switch on the chemical column, SF6 gas is used as the insulating medium to enhance the internal insulation strength, which puts forward higher requirements on the sealing of the metal shell, so it is prone to insulation failure caused by SF6 gas leakage

On the other hand, SF6 gas is a greenhouse gas, and its leakage will cause environmental pollution, which limits the use of SF6 gas-insulated vacuum switchgear.

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