Longitudinal movement type circuit breaker handcart

Abstract

The invention relates to a longitudinal movement type circuit breaker handcart which is provided with an upper isolating switch moving contact head and a lower isolating switch moving contact head that can be synchronously driven via a link mechanism; after the circuit breaker handcart is pushed into a circuit breaker cabinet, the upper isolating switch moving contact head and the lower isolating switch moving contact head can move in opposite directions while the link mechanism is driven; the upper isolating switch moving contact head and the lower isolating switch moving contact head can therefore be respectively inserted into an upper static contact head seat in an upper contact head box and a lower static contact head seat in a lower contact head box, an upper isolating cutter and a lower isolating cutter of a switch cabinet can be shut at the same time, and power delivery is realized after handcart circuit breaker closing operation is performed at last.

Description

technical field [0001] The invention belongs to the technical field of electrical equipment, and in particular relates to a handcart for a longitudinally removable circuit breaker. Background technique [0002] The current A, B, C three-phase contacts of the removable switchgear are generally arranged horizontally in the middle, defining relative to the operator, the A, B, C three-phase contacts of the circuit breaker are arranged longitudinally along the rear, middle and front directions , The three-phase contacts of circuit breakers A, B, and C are arranged horizontally along the left, middle, and right directions. [0003] Due to the existing circuit breaker handcart, the moving contacts electrically connected to the switch cabinet are all fixed. In order to ensure that the static contacts of the switch cabinet are not interfered in the process of detaching or pushing into the switch cabinet, A, B, C Three-phase moving contacts can only be arranged horizontally along the...

AI Technical Summary

Problems solved by technology

[0005] The disadvantage of this kind of circuit breaker handcart is that the horizontal arrangement of the three-phase main circuit of the high-voltage circuit breaker results in a large cabinet width, and the front and rear movement of the handcart requires a certain stroke, resulting in a deep cabinet, so it occupies a large area; The length of main busbar and branch busbar is large, the processing cost is high, and they are used as the main heat source, causing energy loss and affecting the safety of equipment work

At the same time, after the handcart of the circuit breaker is installed in the switch cabinet, it realizes and maintains the plugging of the dynamic and static contacts. The on-off of the circuit is controlled by the opening and closing operation of the handcart circuit breaker, and its safety performance is not high

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