a circuit breaker

Abstract

The invention discloses a circuit breaker, which includes a mechanism box and an arc extinguishing chamber. A rack groove is provided at one end of the moving groove, and a rack is movably installed at one end of the rack groove. One end of the push gear is movably installed on one end of the push plate, and one end of the rack is movably installed with a rotating support rod. A limit screw is installed inside the rack slot through a threaded hole. A rectangular cylinder is fixedly installed in the middle, and a limit cylinder is installed movable inside the rectangular cylinder. A fixed screw is installed at one end of the rectangular cylinder through a threaded hole. Compared with the prior art, the beneficial effect of the present invention is that the arc can be quickly cut off, thereby achieving rapid extinguishment. The purpose of the arc is to improve the efficiency of arc extinguishing, and at the same time reduce the heat generated during arc extinguishing, prolong the service life of the circuit breaker, and effectively avoid the situation that the circuit breaker is burned due to high temperature of the circuit breaker.

Description

technical field [0001] The invention relates to the technical field of circuit breakers, in particular to a circuit breaker. Background technique [0002] A circuit breaker refers to a switching device that can close, carry and break current under normal circuit conditions and can close, carry and break current under abnormal circuit conditions within a specified time. Circuit breakers can be used to distribute electrical energy. Start the asynchronous motor frequently, protect the power line and the motor, and automatically cut off the circuit when they have severe overload, short circuit and undervoltage faults. Its function is equivalent to the combination of a fuse switch and an overheating relay. . [0003] In the current use of vacuum circuit breakers, the arc is extinguished directly through high-intensity vacuum, resulting in high temperature during the arc extinguishing process, which has a high temperature effect on the conductive rod and the moving contact, which...

AI Technical Summary

Problems solved by technology

[0004] The present invention provides a circuit breaker, which can effectively solve the above-mentioned background technology. During the use of the current vacuum circuit breaker, arc extinguishing is directly carried out through high-intensity vacuum, resulting in high temperature during the arc extinguishing process, which is harmful to the conductive rod and The high temperature impact caused by the moving contact affects the service life of the conductive rod and the moving contact and reduces the service life of the circuit breaker

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