Vacuum circuit breaker and load switch

Abstract

The invention discloses a vacuum circuit breaker and a load switch. The vacuum circuit breaker and the load switch solve the problems that in the prior art, the size is large, power supply continuity is poor, and the environment is polluted by SF6 gas. The vacuum circuit breaker and the load switch comprise a mini-type modularized polar column and an operating mechanism. The vacuum circuit breaker and the load switch are characterized in that the polar column comprises a vacuum arc-extinguishing chamber, a chain contact finger connecting base, a fixed contact, an electric conduction flexible connection and an insulation pulling rod, the vacuum arc-extinguishing chamber, the chain contact finger connecting base, the fixed contact, the electric conduction flexible connection and the insulation pulling rod are packaged inside an outer shell insulation cavity, the operating mechanism comprises a polar column installation rack and a mechanism body, the part standardization degree of the mechanism body is high, the mechanism is easily assembled, disassembled and replaced, the manual operation and the electric operation can be achieved by adjusting an energy storage motor or a switch-on electromagnet or a switch-off electromagnet or an energy pre-storage switch-off spring or an energy pre-storage switch-on spring and replacing the parts like the vacuum arc-extinguishing chamber, the conversion of switching on and switching off is completed, and the conversion of the circuit breaker and the load switch is completed. The vacuum circuit breaker and the load switch are compact in structure, reasonable in design, high in insulation strength and good in interchangeability, facilitate field installation and debugging, have the switch-on capacity and switch-off capacity of different breaking currents, can achieve the rapid and stable switching on and switching off, are safe and reliable in use, and remarkably prolong the service life.

Description

technical field [0001] The invention relates to a unit for solid insulated switchgear, in particular to a small modular all solid insulated vacuum circuit breaker and a load switch suitable for use in a 12-24Kv, 50Hz three-phase AC power grid. It is mainly suitable for constituting a solid combination unit for a modular solid insulated ring network cabinet. Background technique [0002] At present, vacuum circuit breakers have been used in solid-insulated ring network cabinets of three-phase AC power grids such as urban buildings, shopping malls, public utilities, airports, railways, transportation, coal, chemicals, steel, industrial and mining enterprises, transmission substations and power plants. Wide range of applications. Existing vacuum circuit breakers can be divided into air, gas and solid insulation according to the insulation medium. The primary electrical components and conductive circuits of air-insulated switchgear are exposed to the air, which is large in siz...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a small modular vacuum circuit breaker and load switch with full solid insulation, which solves the problems of large volume, poor power supply continuity and SF6 gas pollution of the existing circuit breaker and load switch, and has a compact structure. , the design is reasonable, the components are easy to achieve small modularization, the insulation strength is high, the interchangeability is good, it is convenient for on-site installation and debugging, it has the ability to open and close with different breaking currents, it can realize fast and stable opening and closing, and it is safe and reliable to use , significantly prolonging the service life

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