Vacuum switch on metal enclosed column of straight outgoing line sleeve

Abstract

The invention relates to a vacuum switch on a metal enclosed column of a straight outgoing line sleeve. The vacuum switch comprises a box body and a three-phase pole post, wherein two phase bending outgoing line sleeves and a phase straight outgoing line sleeve are arranged on each of a front wall plate and a rear wall plate of the box body, the straight outgoing line sleeve and the bending outgoing line sleeves respectively comprises an insulation sleeve and a conductive rod, the conductive rod is arranged in the center of the insulation sleeve, one end of the straight outgoing line sleeve and one end of each bending outgoing line sleeve are arranged in the box body and are connected with an end part of the pole post, the other ends of the straight outgoing line sleeve and the bending outgoing line sleeves are arranged at an outer side of a wall plate of the box body, middle parts of the straight outgoing line sleeve and the bending outgoing line sleeves are fixedly arranged on the wall plate of the box body, the straight outgoing line sleeve is connected with a one-phase pole post at a middle part, a central line of the straight outgoing line sleeve is a straight line, the bending outgoing line sleeves are connected with two phase pole posts at two sides, and a central line arranged at a part of an outer side of the box body is bent towards a direction deviating from the straight outgoing line sleeve. By the vacuum switch, relatively high insulation capability is ensured, the problem of environmental protection brought by SF6 gas insulation is prevented, and the airtightrequirement on the box body is also reduced.

Description

technical field [0001] The invention relates to a power distribution switchgear in a power system, in particular to a vacuum switch on a straight-out line bushing metal closed column. 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 ca...

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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