Double acting high voltage sf6 circuit breaker self energy interrupter

Abstract

The invention relates to a self-driven arc extinguishing chamber for a double acting type high voltage SF6 breaker. The self-driven arc extinguishing chamber comprises an upper contact system and a lower contact system which cooperate with each other, wherein in the upper contact system, a lever passing through an axle pin covers onto an upper contact support, one end of the lever is connected with a shifting fork on an upper arc contact rod through a lever pin, and an upper arc contact is electrically connected with the upper contact support; and in the lower contact system, a pull rod is connected with the transmission crankarm of an operating mechanism through an insulating pull rod, and a lower arc contact fixed at the top end of the pull rod is electrically connected with a lower contact support. The self-driven arc extinguishing chamber for the double acting type high voltage SF6 breaker enables the upper and lower contacts to move oppositely when being turned off, thereby increasing rigid separation speed, ensuring heavy-current turning-off, and simultaneously ensuring light-current turning-off without repeated breakdown. The operating power of a breaker only corresponds to 1 / 2 of the operating power of a single acting type breaker, thereby greatly reducing the operating power of the operating mechanism, such that the operating power of the double acting type high voltage SF6 breaker is reduced to be 1 / 9 of the operating power of a pneumatic breaker, thereby ensuring the turning-on and turning-off performance of the breaker.

Description

technical field [0001] The invention relates to a self-energy interrupter of a circuit breaker, in particular to a self-energy interrupter of a double-action high-voltage SF6 circuit breaker. Background technique [0002] High-voltage SF6 circuit breaker is a kind of SF6 gas as the insulation and arc extinguishing medium, which can close, carry and break the normal current of the operating circuit in the high-voltage transmission line, and can also close, carry and break the specified circuit within the specified time. Switching devices for short-circuit currents. It is mainly used for the control and protection of transmission lines. The arc extinguishing chamber is the core component of the high-voltage SF6 circuit breaker to realize the function. According to the arc extinguishing principle, there are compressed air type and self-energy type. [0003] When the compressed air interrupter is interrupted, it relies on compressing the SF6 gas in the compressed cylinder to ge...

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a double-action high-voltage SF6 circuit breaker self-energy arc extinguishing chamber, which can solve the problem that the operating work of the existing arc extinguishing chamber operating mechanism is relatively large, and greatly reduce the operating work of the operating mechanism. Guaranteed the closing and breaking performance of the circuit breaker

Images