On-column vacuum circuit breaker

Abstract

The invention discloses a pole-mounted vacuum circuit breaker via which limiting poles can be changed conveniently A pole-mounted vacuum circuit breaker is disclosed and comprises a base seat and a pole rod; a switch-on power device, a switch-off power device, a transmission device and a switch on-off device are arranged in the base seat; the transmission device comprises a support rack fixedly connected to the base seat, the support rack is provided with first waist-shaped track holes and waist-shaped second track holes that form an included angle, the transmission device also comprises a main shaft, a first limiting pole of which two ends are clamped in the first track holes are arranged on the main shaft in a penetrating manner, and the first limiting pole is provided with a first locking mechanism used for preventing the first limiting pole from axial movement; positions, arranged at two sides of the main shaft, of the first limiting pole are provided with rotating rods that are connected with the first limiting pole in a rotating manner; a second limiting pole of which two ends are clamped in the second track holes is arranged on one end, facing away from the first limiting pole, of each rotating rod in a penetrating manner; the second limiting pole is provided with a second locking mechanism used for preventing the second limiting pole from axial movement.

Description

technical field [0001] The invention relates to a circuit breaker, in particular to a column-mounted vacuum circuit breaker. Background technique [0002] The utility model patent with the authorized announcement number CN201289816Y discloses an outdoor high-voltage permanent magnet vacuum circuit breaker. In the invention, the movement of the main shaft along the waist-shaped hole in the horizontal direction on the base drives the movement of the insulating pull rod to control opening and closing. [0003] However, this utility model has the following problems: when the driving arm or the opening spring drives the main shaft to move, the force exerted on the main shaft is not exactly in the horizontal direction, and the main shaft is limited by the waist-shaped hole and the limit post on the side of the main shaft. The direction of movement, so every time the switch is opened and closed, the inner wall of the limit post and the waist hole will be worn. After the wear reach...

AI Technical Summary

Problems solved by technology

[0003] However, this utility model has the following problems: when the driving arm or the opening spring drives the main shaft to move, the force exerted on the main shaft is not exactly in the horizontal direction, and the main shaft is limited by the waist-shaped hole and the limit post on the side of the main shaft. The direction of movement, so every time the switch is opened and closed, the inner wall of the limit column and the waist hole will be worn. After the wear reaches a certain level, the main shaft will become unstable when it moves. At this time, the main shaft needs to be replaced.

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