Circuit breaker trolley, switch cabinet and interlocking device

Abstract

The invention relates to a circuit breaker trolley, a switch cabinet and an interlocking device of the circuit breaker trolley. The circuit breaker trolley comprises an arc extinguishing chamber and an opening push rod which is arranged on the outer side of the arc extinguishing chamber and can move in a reciprocating mode; the opening push rod has a first position corresponding to a closing stateof a circuit breaker and a second position corresponding to an opening state of the circuit breaker in a moving process; the circuit breaker trolley is further provided with an interlocking transmission mechanism; the interlocking transmission mechanism comprises a rotating piece which is driven by the opening push rod to rotate in a reciprocating mode; the rotating piece is provided with a pushing part; when the opening push rod is positioned in the second position, the pushing part is positioned in an unlocking position where the pushing part can be matched with the stress end of a lockingmechanism of the interlocking device in a pushing mode to unlock the locking mechanism; and when the opening push rod is in the first position, the pushing part is located above or below the height ofthe unlocking position to avoid the stress end, and then transmission force can be led out from the opening push rod, so that the unlocking and locking of the interlocking device are realized, and the problems of few transmission parts in the circuit breaker and high design difficulty of the interlocking device are solved.

Description

technical field [0001] The invention relates to a circuit breaker trolley, a switch cabinet and an interlocking device thereof. Background technique [0002] In the traction power supply system of urban rail transit, electric energy is transmitted from the static feeder line and catenary of the traction substation to the electric train, and then flows back to the traction substation from the electric train through the rail and the return line. The power supply network consisting of feeder lines, catenary, track loops and return lines is called a traction network. Domestic rail transit subway catenary adopts DC 1500V power supply. The 1500V power supply system consists of positive pole incoming cabinet, negative pole cabinet, feeder cabinet and rail potential limiting device. The feeder cabinet is installed between the positive busbar and the catenary, and is a switch device for direct protection of rail vehicles. The feeder cabinet is equipped with positive busbar, DC fas...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a circuit breaker trolley to solve the problem in the prior art that the design of the interlock device is difficult due to the lack of mechanical transmission parts of the circuit breaker; the purpose of the present invention is also to provide a switch cabinet; The purpose of the invention is also to provide a kind of interlocking device in this switchgear

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