Novel insulator device for isolated-phase bus and enclosed bus

Abstract

A novel insulator device for an isolated-phase bus comprises a support insulator and a bottom plate, the mounting surface of the support insulator is a special-shaped end surface, and the support insulator is fixedly arranged on the bottom plate through the special-shaped end surface. According to the structural design, a metal insert in a traditional insulator supporting structure is removed, meanwhile, the bottom plate is designed to be an insulating bottom plate, the insulator is installed on the bottom plate through the special-shaped end face of the insulator, and the assembly structure of the insulator is completely insulated, so that the creepage distance of the insulator can be increased, the insulating performance of the whole insulator device can be enhanced, and the partial discharge amount can be reduced. Compared with an original structure, hardware fittings used for fixing the insulator and sealing rings used for sealing are reduced, the structure cost can be reduced, and the assembly efficiency can be improved. The invention further provides an enclosed bus, the enclosed bus is provided with the novel insulator device for the isolated-phase enclosed bus, the insulation height of the insulator is increased, the insulation performance of the bus is improved, and the reliability of safe operation of the bus is improved.

Description

technical field [0001] The invention relates to the technical field of power systems, and more specifically relates to a novel insulator device for an isolated-phase enclosed busbar and an enclosed busbar. Background technique [0002] Enclosed metal busbars can be divided into isolated-phase enclosed busbars and shared-box enclosed busbars. Isolated-phase enclosed busbars are widely used in the outgoing line circuits of 50MW and above generators and branch circuits for companies. Phase-off enclosed busbars include a packaging enclosure within which conductors (busbars) are secured by an insulator support structure. [0003] Please refer to figure 1 , figure 1 It is a structural schematic diagram of an insulator support structure in the prior art. [0004] In the prior art, a typical supporting structure of an insulator is as follows: including supporting insulator a, elastic block b, mushroom head fitting c, base plate d and other parts; the supporting insulator is fixed...

AI Technical Summary

Problems solved by technology

[0005] The traditional insulator support structure has the following problems: 1. The bottom plate, mushroom head fittings and bolts are all made of metal materials, especially the use of mushroom head fittings and bolts will reduce the creepage distance of the supporting insulator and reduce the insulation performance of the insulator. 2. The busbar is supported by the mushroom head fittings, and the busbar is in contact with the mushroom head fittings. The isolated-phase closed busbar will inevitably vibrate during operation. This vibration will cause friction between the mushroom head fittings and the busbar and produce metal fragments Metal debris will also reduce the insulation of the insulator; 3. A sealing ring is set between the support insulator and the bottom plate, so that the sealing surface will increase, which puts forward higher requirements for installation

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