Vacuum switch with vacuum arc-extinguishing chamber

Abstract

The invention discloses a vacuum switch with a vacuum arc-extinguishing chamber. The vacuum switch comprises insulating housings which are internally provided with an intermediate shielding cover. Furthermore the intermediate shielding cover is internally provided with a corrugated pipe protecting cover. The corrugated pipe protecting cover is internally provided with a corrugated pipe. Furthermore the corrugated pipe is internally provided with a dynamic conductive rod. One end of the dynamic conductive rod is provided with a moving contact, and furthermore one side of the moving contact is provided with a static contact. One end of the static contact is connected with a static conductive rod. A static grading shield is arranged outside the static contact. The insulating housings are connected with each other through an intermediate sealing ring. According to the vacuum switch with the vacuum arc-extinguishing chamber, arc is extinguished in a sealed container, thereby realizing no leakage of arc and hot gases; small clearance between 1mm and 40mm is realized between the static contact and the moving contact; and furthermore the vacuum switch with the vacuum arc-extinguishing chamber has advantages of short arc combustion time, low arc voltage, low arc energy, low contact wearing, large number of allowed on-and-off times, small inertia of the dynamic conductive rod, high suitability for high-frequency operation, small size of the operating mechanism, small size of the vacuum switch, small weight and low control power.

Description

technical field [0001] The invention relates to the technical field of electric equipment, in particular to a vacuum switch containing a vacuum interrupter. Background technique [0002] With the development of China's power system, oil-free transformation and power equipment manufacturing technology, the use of vacuum switches has become more popular and popularized. Vacuum switches are characterized by their small size, low environmental pollution, good arc extinguishing performance, easy operation and maintenance, and reliability. The advantages of high performance, long mechanical and electrical life, etc. have been widely used in power supply systems such as domestic mines, large and medium-sized hydropower stations, and substations. Vacuum switches use vacuum as a circuit breaker for insulation and arc extinguishing. The degree of vacuum directly affects the vacuum The performance of the switch, if the vacuum degree of the vacuum switch cannot be controlled in time, it...

AI Technical Summary

Problems solved by technology

[0002] With the development of China's power system, oil-free transformation and power equipment manufacturing technology, the use of vacuum switches has become more popular and popularized. Vacuum switches are characterized by their small size, low environmental pollution, good arc extinguishing performance, easy operation and maintenance, and reliability. The advantages of high performance, long mechanical and electrical life, etc. have been widely used in power supply systems such as domestic mines, large and medium-sized hydropower stations, and substations. Vacuum switches use vacuum as a circuit breaker for insulation and arc extinguishing. The degree of vacuum directly affects the vacuum The performance of the switch, if the vacuum degree of the vacuum switch cannot be controlled in time, it may bring unimaginable consequences. Accidents caused by failure to control the vacuum degree of the vacuum switch in time have caused great losses. Most of the vacuum switch accidents are caused by vacuum Therefore, it is very important to use scientific means to monitor the vacuum degree of the vacuum switch on a regular or irregular basis, and to find out the signs of failure in time is of great significance to the safe and reliable operation of the vacuum switch and the entire power system. However, the current vacuum switch exists There are many deficiencies. Because the vacuum switch is installed with a relatively good quality vacuum interrupter, its electrical performance and mechanical performance have been significantly improved. On-site installation and maintenance are more complicated, but it often breaks down during use, and the vacuum The service life of the switch is short and the manufacturing cost is high. Therefore, a vacuum switch with a vacuum interrupter is proposed to solve the above problems.

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