Universal case for molded case circuit breaker, molded case circuit breaker and residual current circuit breaker

Abstract

The invention relates to a universal case for a molded case circuit breaker, the molded case circuit breaker and a residual current circuit breaker. According to the structure of the universal case for the molded case circuit breaker, the external dimensions and the mounting dimensions of the structures of the molded case circuit breaker and the residual current circuit breaker are consistent, and the part universality reaches over 95 percent, namely the size increase is avoided, and the development cost and the die cost are lowered. Moreover, the molded case circuit breaker and the residual current circuit breaker are conveniently arranged and replaced by a user. Unified external dimensions and unified appearance are adopted for the residual current circuit breaker and the molded case circuit breaker with the structure. Arc extinction systems, contact systems and operation systems in the residual current circuit breaker and the molded case circuit breaker are completely consistent, and release structures of the residual current circuit breaker and the molded case circuit breaker are different.

Description

technical field [0001] The invention relates to a general molded case circuit breaker shell, a molded case circuit breaker and an earth leakage circuit breaker, in particular to a general plastic case circuit breaker and a molded case earth leakage circuit breaker that can be replaced by simple parts replacement. A shell circuit breaker shell belongs to the technical field of application of low-voltage electrical appliances. Background technique [0002] The function of the molded case circuit breaker is to protect the circuit and power supply from damage in the event of overload, short circuit and undervoltage. The role of the molded case leakage circuit breaker is: to provide indirect contact protection for fatal electric shocks, and to prevent fires and other disasters caused by electrical equipment insulation damage. Due to the difference in the above functions between the circuit breaker and the leakage circuit breaker, the two are not universal. [0003] According to...

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is that the circuit breaker and leakage circuit breaker in the prior art have complex structure or high cost when they are interchanged, so as to provide a circuit breaker and leakage circuit breaker that can facilitate the interchange of circuit breakers and leakage circuit breakers without adding circuit breakers. Universal molded case circuit breaker case using space, and a molded case circuit breaker utilizing the case and an earth leakage circuit breaker utilizing the case

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