Arc extinguishing chamber and residual current operated circuit breaker

Abstract

An arc extinguishing chamber comprises a plurality of arc chutes arranged between two side walls at intervals and in a stacked way. A gap is left between every two arc chutes. The arc extinguishing chamber further comprises a laminated arc guide plate mechanism arranged between the two side walls. The laminated arc guide plate mechanism comprises a plurality of grid sheets laminated together and an arc guide plate connected with the grid sheets. Because the arc extinguishing chamber of the invention is provided with the laminated arc guide plate mechanism, quick arc striking can be realized through the laminated grid sheets and the arc guide plate, moving and static contacts can be prevented from burnout, and the effects of arc striking and arc extinguishing can be achieved. The invention further provides a residual current operated circuit breaker which has the advantages of compact structure, strong arc striking and extinguishing capacity, and high reliability.

Description

technical field [0001] The invention belongs to the field of low-voltage electrical appliances, and relates to an arc extinguishing chamber of a circuit breaker and a residual current operated circuit breaker. Background technique [0002] With the increase of low-voltage power grid capacity, the demand for low-voltage circuit breakers is increasing rapidly. At the same time, the requirements for circuit breakers are getting higher and higher, and the market competition is becoming more and more fierce. The current overall requirements for low-voltage circuit breakers are: high short-circuit breaking capacity and small size. Therefore, in order to extinguish the arc energy generated by large short-circuit currents, the size of the arc extinguishing chamber cannot be arbitrarily increased, that is, it must be in a certain arc extinguishing chamber. Under volume, study the best arc extinguishing function. [0003] In order to improve the short-circuit breaking capacity, the f...

AI Technical Summary

Problems solved by technology

The production cycle of potting 704 silica gel is slow, not suitable for mass production, and it is not conducive to repair, and it is not easy to detect problems on the production site; unilaterally paint insulating varnish or conformal paint, if the product is used in a humid environment, the insulating paint will be damaged after a long time. Or once the three-proof paint is aged, it will completely lose the moisture-proof barrier, which will easily cause a short circuit inside the electronic component board, causing the electronic component board to burn out.

Images