Novel air insulation vacuum circuit breaker

Abstract

The invention provides a novel air insulation vacuum circuit breaker, and belongs to the field of electric equipment. The novel air insulation vacuum circuit breaker comprises a circuit breaker shell,an operating mechanism, an arc extinguishing device, protection systems and a contact point system. Electromagnets, a permanent magnet slider and a mechanical slider are arranged in an arc extinguishing chamber of the arc extinguishing device, a lower contact point is fixedly mounted on the mechanical slider, the electromagnets and the permanent magnet slider can be matched with one another to drive the mechanical slider to slide in the left-right directions, accordingly, the lower contact point can be driven to move in the left-right directions, can be in contact with an upper contact pointand can be separated from the upper contact point, and the novel air insulation vacuum circuit breaker can be switched on and off; integral power systems are arranged in the vacuum arc extinguishing chamber, accordingly, the problem of influence on sealing due to internal and external transmission of existing vacuum arc extinguishing chambers and seal air chambers can be solved, the air tightnessof the novel air insulation vacuum circuit breaker can be improved, and the service life of the novel air insulation vacuum circuit breaker can be prolonged; the novel air insulation vacuum circuit breaker is good in air tightness, long in service life and convenient to maintain.

Description

technical field [0001] The invention belongs to the field of electrical equipment, in particular to a novel air-insulated vacuum circuit breaker. Background technique [0002] Circuit breakers are divided into high-voltage circuit breakers and low-voltage circuit breakers according to their scope of use. Low-voltage circuit breaker, also known as automatic switch, commonly known as "air switch", also refers to low-voltage circuit breaker. It is an electrical appliance that not only has the function of manual switch, but also can automatically protect against voltage loss, undervoltage, overload, and short circuit. It can be used to distribute electric energy, start asynchronous motors infrequently, protect power lines and motors, etc., and can automatically cut off the circuit when they have severe overload, short circuit and undervoltage faults. Its function is equivalent to a fuse switch and The combination of overheating and underheating relays, etc., and generally does ...

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Problems solved by technology

[0003] However, in the traditional vacuum circuit breaker, such as the circuit breaker provided by the invention patent with the patent number: 201410818595.1, it has a series of operating mechanisms combined with a vacuum interrupter, upper and lower contacts, etc. to realize the function of the circuit breaker. Connection and disconnection require the mechanical transmission of the operating structure, but the gap between the two parts that move relatively is usually sealed with soft insulation, but the relative movement is easy to cause damage to the soft sealing material and affect the sealing, resulting in reduced vacuum Service life of interrupter and gas chamber

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