High altitude indoor high voltage alternating current combined vacuum circuit breaker

Abstract

The invention provides a high altitude indoor high voltage alternating current combined vacuum circuit breaker. The high altitude indoor high voltage alternating current combined vacuum circuit breaker comprises a chassis, three sets of wiring boards and conducting bases are installed at the two sides of the chassis in an insulating mode respectively, the wiring boards are electrically connected to incoming line cables, the conducting bases are electrically connected with outgoing line cables, a touch knife, a wall penetrating polar column and a vacuum arc extinguish chamber are arranged between each set of wiring board and the conducting base in sequence, the chassis is further provided with an operating mechanism, first insulating pull rods are arranged between the operating mechanism and the touch knives, the operating mechanism is further provided with a second insulating pull rod in a linkage mode, the second insulating pull rod is provided with a drive rod in a linkage mode, thedrive rod is provided with a guide rod in a linkage mode, and the guide rod is connected with one end of the vacuum arc extinguishing chamber. The high altitude indoor high voltage combined vacuum circuit breaker has the advantages of being small in operating mechanism operation power, long in machine life, high in arc extinguishing capability, good in protecting effect and small in maintenance and can be more suitable for being used in a bad environment and a high altitude region.

Description

technical field [0001] The invention relates to the field of electric equipment, in particular to a vacuum circuit breaker. Background technique [0002] The wind power generator converts the wind energy into AC power (voltage 690V) through the rotating blades and the generator, and then sends it into the power system through the step-up transformer and 35KV switchgear in the 35KV box transformer. Generally, according to the principle of one machine, one transformer, each The fan is equipped with a 35KV box transformer, and each box transformer needs to be equipped with a 35KV switchgear. The switchgear can be a vacuum load isolating switch-fuse combination in which a load isolating switch and a fuse are integrated, or a high-voltage AC combined vacuum circuit breaker. [0003] Among them, Chinese patent CN201310306091 discloses a combination of vacuum load switch and fuse. The feature of this patent is that an electrical connection formed by a through-wall insulated conduc...

AI Technical Summary

Problems solved by technology

Due to the large mass of the isolating switch switch, the operating force of the operating mechanism is required to be large, and the impact during the operation is relatively large, which affects the operating life of the switch mechanism. At the same time, the closing current parameters of the load switch are not easy to increase.

In addition, although the cost of vacuum load switch and fuse combination is low, it has certain limitations, such as relatively weak arc extinguishing function, and the fuse needs to be replaced from time to time, etc.

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