Sealing type three-stations load switch and manufacturing method thereof

Abstract

The invention discloses a vacuum three-station load switch and the method for manufacturing, the same, wherein, a ground contact room(3) is arranged over an isolating contact room(5); a shield element (8) is arranged around an operation part(9) of an isolating switch; a link copper busbar(4) is arranged between the ground contact room(3) and the isolating contact room(5); a chain type conducting ring(12) is arranged at one end of the isolating contact room(5). The manufacturing method of the invention includes the following steps: the subassembly of the load switch is arranged in a mould after installed and linked; epoxy resin is used for die-casting the subassembly into an integrated body; a conductive silicon rubber layer (14) is coated or printed on the surface around an epoxy resin cover(2); after totally sulfurized, the silicon rubber (14), the surface resistance is from 5K ohm to 20 K ohm. The invention has the advantages of smaller size, convenient installation, stronger environment adaptability, good insulating performance, alternative insulating performance, safe and reliable operation, convenient maintenance and replacement.

Description

technical field [0001] The invention belongs to the technical field of electric equipment manufacture, and in particular relates to the design and manufacture of a solid-sealed three-position load switch used in a solid insulated switchgear and its manufacturing method. Background technique [0002] At present, in the high-voltage armored central cabinet, the isolating switch and the grounding switch are two independent parts, and their operations can only be completed by their respective mechanisms. The isolating switch only has two states of opening and closing, and the grounding is completed through the grounding switch. Both switches are conventional switches that are visible on the knife edge. These two switches are generally placed in the air and are insulated by air, so The required insulation distance will be very large, so that the overall size of the entire switchgear is relatively large, and higher requirements are placed on the installation space of the user. In...

AI Technical Summary

Problems solved by technology

The isolating switch only has two states of opening and closing, and the grounding is completed through the grounding switch. Both switches are conventional switches that are visible on the knife edge. These two switches are generally placed in the air and are insulated by air, so The required insulation distance will be very large, so that the overall size of the entire switchgear will be larger, and higher requirements will be placed on the user's installation space.

In addition, the switch relies on air insulation, and the metal shell is used to make a simple closed switch cabinet. The external environment can easily affect the operation of the entire switch cabinet, and the insulation performance and phase isolation are not ideal, making the safety and reliability of power transmission and distribution It is more important to research and manufacture new power load switchgear

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