Connecting structure for vacuum arc-extinguishing chamber moving contact and conductive holder

Abstract

The invention discloses a connecting structure for a vacuum arc-extinguishing chamber moving contact and a conductive holder. The connecting structure is characterized in that the contact surface between the vacuum arc-extinguishing chamber moving contact (1) and the conductive holder adopts a tooth form meshing surface (3), so as to enlarge the contact area between the vacuum arc-extinguishing chamber moving contact and the conductive holder. The connecting structure disclosed by the invention has the advantages that the contact surface between the vacuum arc-extinguishing chamber moving contact and the conductive holder adopts the tooth form meshing surface, so that the contact area between the vacuum arc-extinguishing chamber moving contact and the conductive holder can be enlarged, the resistance of the conductive loop can be reduced, the carrying capacity of the conductive loop can be increased, meanwhile a large temperature rise allowance can be ensured in the actual practice, the service life of a vacuum circuit breaker can be prolonged, and the electrical performance of the vacuum circuit breaker can be ensured.

Description

technical field [0001] The invention relates to a connection structure between a moving contact of a vacuum interrupter and a conductive clip in a power distribution system. Background technique [0002] The vacuum interrupter uses epoxy resin as the insulating medium, and uses epoxy resin to seal the vacuum interrupter of the primary conductive part of the vacuum circuit breaker and the current-carrying components such as the upper and lower outlet terminals into one body, so that the insulation state of the vacuum interrupter is completely stable. Improved environmental resistance due to the influence of the external environment. However, there are still the following problems in the application process: the contact surface between the moving contact of the vacuum interrupter and the conductive clip adopts a planar contact structure, which easily leads to insufficient contact, which in turn leads to a large contact resistance of the conductive circuit and reduces the curre...

AI Technical Summary

Problems solved by technology

However, there are still the following problems in the application process: the contact surface between the moving contact of the vacuum interrupter and the conductive clip adopts a planar contact structure, which easily leads to insufficient contact, which in turn leads to a large contact resistance of the conductive circuit and reduces the current carrying capacity of the conductive circuit. , when in the process of operation, it is easy to generate heat due to the action of the electric field, which will cause the temperature rise to be too high, which may easily cause safety accidents. In serious cases, it may even affect the safety of personnel due to the protection of switchgear.

[0003] Assembling the movable contact of the vacuum interrupter with the conductive clip in the prior art: the assembly method is that the movable contact of the real-name interrupter on the real-name interrupter and the conductive clip adopt plane contact, and the conductive clip is fastened by standard parts to make the conductive clip Combined with the moving contact of the vacuum interrupter, the contact is made in the form of plane contact. Although the subsequent fastening is carried out through standard parts, there is point contact in the plane contact, which makes the contact surface unreliable, and the plane contact area is small. Under the action of high temperature, it is easy to generate high temperature and cause the vacuum interrupter to burn out

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