Isolation switch

Abstract

The invention discloses an isolation switch. The isolation switch comprises a static contact seat and an isolation switch body, wherein the static contact seat and the isolation switch body are arranged in a split way, and the isolation switch is flexible to assemble and is free from limitation of application equipment. The static contact seat is arranged in switch equipment, the isolation switchbody is arranged at a lower part of the static contact seat, the static contact seat comprises a T-type structure static contact piece and a support insulator, an upper side of the static contact piece is fixed on the support insulator, a lower side of the static contact piece is disconnected or connected with the isolation switch body, and the isolation switch body comprises a static contact piece assembly, a conductor, an insulation support and a support framework. The structure is simplified by the movable contact piece assembly, a traditional penetrating bolt fastening piece is eliminated,an upper group of pull spring and a lower group of pull spring are arranged, the charged body range is reduced, the insulation distance is shortened, the point discharging is reduced, the safety andthe reliability are improved, the assembly process is simplified, the contact pressure can be directly achieved by the upper group of pull spring and the lower group of pull spring, and the debuggingprocess is simplified.

Description

technical field [0001] The invention belongs to the technical field of switchgear for power transmission and distribution, in particular to an isolating switch. Background technique [0002] The main purpose of the isolating switch is to provide a visible fracture during the maintenance process to ensure safety and reliability. It is the most widely used electrical product in high-voltage switching appliances, and its structure is simple. However, there are many defects in the current isolating switches: [0003] (1) The volume is large, the structure is old-fashioned, and most of them use integrated switches, which leads to the overall large volume of the switchgear using the disconnector, which restricts the development of the miniaturization of the switchgear. [0004] (2) Defects in the design of the static contact seat: the current structure of the isolating switch is as follows: figure 1 As shown, the insulator is fixed on the support frame of the isolation switch, t...

AI Technical Summary

Problems solved by technology

[0003] (1) The volume is large, the structure is old-fashioned, and most of them use integrated switches, resulting in a large overall volume of the switchgear using the disconnector, which restricts the development of the miniaturization of the switchgear

[0004] (2) Defects in the design of the static contact seat: the current structure of the isolating switch is as follows: figure 1 As shown, the insulator is fixed on the support frame of the isolation switch, the contact surface of the moving knife is perpendicular to the lap surface of the busbar, and the connection between the main busbar and the static knife needs to increase the branch busbar (16), the upper and lower two sets of contact surfaces, and the static knife is fixed on the supporting insulator On, the insulator is connected to the bracket

The structure is old-fashioned and complicated, it is difficult to realize the separation of switchgear compartments, the protection level cannot be provided, there are many sharp corners and burrs, and a large insulation distance must be ensured

During the closing process, the moving knife and the static contact seat rigidly impact without buffering, which affects the mechanical life of the product; at the same time, the installation flexibility is limited

[0005] (3) Defects in the design of the movable contact knife: The disconnector generally includes a rotatable movable contact knife. The movable contact knife is generally composed of two or more pieces, one side of which is hinged to the inner conductor of the lower insulating bottom plate, and the other side is a free end. Through the action of the operating mechanism, the free end can be rotated and connected to the static contact and the grounding contact respectively to realize the closing and grounding of the circuit

The existing movable contact knife assembly adopts the bolts that pass through, and the spring is sandwiched in the middle to realize the assembly. This form increases the complexity of the assembly, increases the distance between the charged body, increases the phase spacing, and is affected by the machining accuracy of the fasteners. It is easy to produce tip discharge; the contact pressure needs to be adjusted many times during the debugging process, and the nut has a large error

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