Single-fracture can-type vacuum circuit breaker

Abstract

A single-fracture can-type vacuum circuit breaker overcomes the defects that in the prior art, an existing vacuum circuit breaker is complex in structure, large in size, poor in heat dissipation performance and high in manufacturing cost. The single-fracture can-type vacuum circuit breaker is characterized in that a steel can, a left supporting insulator and a right supporting insulator form a vacuum chamber, a left sleeve, a bend-type left can and the left supporting insulator form a left wiring chamber, a right sleeve, a bend-type right can and the right supporting insulator form a right wiring chamber, the axis of a movable electric conductor is perpendicular to the axis of the steel can, the movable electric conductor penetrates through an electric conduction sleeve and form a single fracture with a fixed electric conductor, and clean and dry compressed air or other gas is filled into the left wiring chamber and the right wiring chamber to serve as an insulating medium or be used for keeping a vacuum state. The single-fracture can-type vacuum circuit breaker has the advantages that the structure is simple and compact, due to the fact that the movable electric conductor is directly and perpendicularly arranged in the vacuum chamber and the influence of the gravity on a movable electric conductor contact terminal is eliminated, the coaxiality of the movable electric contactor contact terminal and a fixed electric conductor contact terminal can be guaranteed, and due to the fact that an arc extinguish chamber porcelain bushing is omitted, the heat dissipation performance is good and the manufacturing cost of an arc extinguish chamber and the manufacturing cost of the vacuum circuit breaker are reduced.

Description

technical field [0001] The invention belongs to the technical field of high-voltage electrical appliances, and in particular relates to a single-break tank type vacuum circuit breaker. Background technique [0002] Circuit breakers are important electrical components in high-voltage power transmission and distribution, and play a very important role in the entire power transmission and distribution system. The circuit breakers in the prior art include porcelain bottle type circuit breakers and tank type vacuum circuit breakers. The porcelain bottle type circuit breakers are equipped with an arc extinguishing chamber in the porcelain bottle. The arc extinguishing chamber has a porcelain sleeve, and a moving conductor and a The static conductor, the moving conductor and the static conductor are respectively connected to the metal flanges at both ends of the porcelain bottle. Since the metal flange is charged, the surface of the porcelain bottle connected to it cannot be touche...

AI Technical Summary

Problems solved by technology

The circuit breakers in the prior art include porcelain bottle type circuit breakers and tank type vacuum circuit breakers. The porcelain bottle type circuit breakers are equipped with an arc extinguishing chamber in the porcelain bottle. The arc extinguishing chamber has a porcelain sleeve, and a moving conductor and a The static conductor, the moving conductor and the static conductor are respectively connected to the metal flanges at both ends of the porcelain bottle. Since the metal flange is charged, the surface of the porcelain bottle connected to it cannot be touched, and the porcelain bottle itself has poor shock resistance and heat dissipation. The porcelain bottle is filled with hexafluoride Sulfur gas insulates and pollutes the environment; while the tank-type vacuum circuit breaker interrupter also installs a moving conductor and a static conductor in the porcelain sleeve, and then installs the arc-extinguishing chamber with the porcelain sleeve horizontally in the metal tank, due to gravity The contact part of the moving conductor is easy to tilt downward, which affects the coaxiality of the moving conductor contact and the static conductor contact, and produces a large friction force on the guide sleeve of the moving conductor, so the guide sleeve Surface roughness, wear resistance and length have high requirements, high manufacturing cost and short service life

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