A double isolation circuit breaker and a switchgear using the circuit breaker

Abstract

The invention relates to a double-isolation circuit breaker and a switch cabinet provided with the circuit breaker. The circuit breaker comprises an arc extinguishing chamber. An upper electrode and a lower electrode are arranged in the arc extinguishing chamber. The circuit breaker further comprises an upper isolated movable contact and a lower isolated movable contact, wherein the upper isolated movable contact and the lower isolated movable contact are movably assembled along the up-down guiding direction inside the arc extinguishing chamber and are in conduction with the upper electrode and the lower electrode correspondingly. The upper isolated movable contact is provided with an upper switching-on station and a lower isolation station, wherein the switching-on station and the isolation station are arranged along the up-down movement stroke. The lower isolated movable contact is provided with a lower switching-on station and an upper isolation station, wherein the switching-on station and the isolation station are arranged along the up-down movement stroke. The upper isolated movable contact, the upper electrode, the lower electrode and the lower isolated movable contact are sequentially arranged along the up-down vertical direction to form a vertical I-shaped linear structure. In this way, the size of the entire circuit breaker along the horizontal transverse direction is reduced maximally. Meanwhile, the overall size of the switch cabinet provided with the circuit breaker is also reduced.

Description

technical field [0001] The invention relates to a double isolation circuit breaker and a switchgear using the circuit breaker. Background technique [0002] Switchgear has gradually occupied the absolute market in the field of medium voltage and power distribution switches due to its advantages of high integration and small footprint. A significant factor in cabinet cost. Therefore, if the material usage of the main circuit can be reduced under the premise of satisfying the same function, it will have a great positive effect on reducing the cost of the switchgear. [0003] At present, there are various main circuit structures of switch cabinets in the market, but most of the main circuits have various "turning" phenomena due to the needs of the structure, that is to say, the arrangement from the incoming line to the outgoing line of the switch cabinet is not a straight line. . For example, the most widely used switchgear with three-phase main circuits arranged horizontall...

AI Technical Summary

Problems solved by technology

[0006] The present invention provides a double isolation circuit breaker to solve the problem that in the prior art, the upper and lower isolation movable contacts of the circuit breaker in the switch cabinet are correspondingly arranged on the left and right sides of the corresponding phase arc extinguishing chamber, so that the size of the circuit breaker in the left and right directions is relatively small. large technical problem; at the same time, the present invention also provides a switchgear using the above circuit breaker

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