Insulating embedded vacuum circuit breaker for gas-filled tank

Abstract

The invention relates to a circuit breaker, in particular to an insulating embedded vacuum circuit breaker for a gas-filled tank. The insulating embedded vacuum circuit breaker comprises a circuit breaker shell, a circuit breaker body, an operating mechanism and a circuit control module, wherein a circuit breaker operating mechanism and an embedded pole are arranged in a box body; the embedded pole is connected with the breaker circuit operating mechanism; the embedded pole comprises an upper conductive frame and a lower conductive frame; a vacuum arc-extinguishing chamber and a fixed contact are arranged between the upper conductive frame and the lower conductive frame; the fixed contact is located in the vacuum arc-extinguishing chamber and is connected with the upper conductive frame; a moving contact capable of moving up and down is arranged in the vacuum arc-extinguishing chamber; the moving contact and the lower conductive frame are kept in connection; an embedded casting body coats the upper conductive frame, the lower conductive frame and the outer wall of the vacuum arc-extinguishing chamber; an air flow channel is arranged in the embedded casting body on the periphery of the vacuum arc-extinguishing chamber; and a cooling fin is arranged on the upper conductive frame. The embedded pole is modified through powder, so that the embedded pole has relatively good sealing stability; and the stability performance of the pole is improved.

Description

technical field [0001] The invention relates to a circuit breaker, in particular to a solid-sealed insulation vacuum circuit breaker for an inflatable cabinet. Background technique [0002] The circuit breaker equipped in the inflatable cabinet not only requires compact structure and small size, but also requires reasonable layout, uniform electric field distribution of live components, and convenient cabinet wiring. [0003] The vacuum circuit breaker adopts a vacuum interrupter, which uses vacuum as the interrupter and insulation medium, and has a very high degree of vacuum. When the moving and static contacts are charged and opened under the action of the operating mechanism, a vacuum arc will be generated between the contacts. The arc is maintained as a diffusion type, and the arc is evenly distributed on the surface of the contact to burn, and the arc voltage is maintained at a low level. When the current naturally crosses zero, the residual ions, electrons and metal v...

AI Technical Summary

Problems solved by technology

[0008] (2) The pole is an important component of the circuit breaker, and its reliability directly affects the performance of the circuit breaker, and the performance of the current pole needs to be strengthened urgently

[0009] (3) In the circuit breaker and the switch cabinet where it exists, there are many spring devices such as opening springs, extension springs, energy storage springs, etc., and once one of these springs falls off or relaxes, it will make the combination with it The function failure of the device will also cause the instability or failure of the circuit breaker. It can be seen that how to effectively monitor and judge whether the spring is in a normal working state is a problem that cannot be ignored in the use of circuit breakers.

[0010] (4) Many components are assembled in the switchgear. During the factory installation or maintenance and assembly of these components, there is a positioning problem. How to design a simple and efficient positioning aid to make the above-mentioned installation or assembly become handy

[0012] (6) The permanent magnet mechanism controller is the core control unit of the permanent magnet mechanism vacuum circuit breaker. The commonly used permanent magnet mechanism vacuum controller is not highly intelligent, and the line protection and monitoring functions are insufficient. The opening and closing bridge IGBT drive circuit Generally, it is photoelectrically isolated and driven and controlled by a digital signal processor (IGBT is an insulated gate bipolar transistor), while the energy storage capacitor is generally charged through a charging circuit. This design can save costs, but the driving signal is anti-interference and reliable. There are deficiencies in performance, which can easily lead to the unreliable turn-on and turn-off of IGBT units, which directly affects the operating performance of opening and closing.

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