Compact molded case circuit breaker with thermomagnetic adjustable alarm non-tripping function

Abstract

The invention relates to a compact molded case circuit breaker with a thermomagnetic adjustable alarm non-tripping function, which comprises a base, a contact arc extinguishing module, a middle cover, an operating mechanism, an upper cover, a controller cover, an overload adjustable alarm non-tripping current protection module and a wiring terminal assembly, wherein the overload adjustable alarm non-tripping current protection module is matched with the operating mechanism, and when the current exceeds the rated current by a certain multiple, the overload adjustable alarm non-tripping current protection module sends out an overload alarm signal; when short-circuit current occurs in the circuit, the overload adjustable alarm non-tripping current protection module directly acts to push the operating mechanism to enable the circuit breaker to be tripped to disconnect the circuit. Compared with the prior art, the circuit breaker is compact in structure, and can realize short-circuit protection, overload alarm and adjustable functions.

Description

technical field [0001] The invention relates to the technical field of circuit breakers, in particular to a compact molded case circuit breaker with thermomagnetically adjustable alarm non-tripping function. Background technique [0002] People's requirements for electricity safety are becoming increasingly strict, and plastic case circuit breakers with current protection action are widely used because of their compact structure, small size and high cost performance. The release is an important mechanism in the circuit breaker. The function of the release is to convert electrical energy into mechanical action, and make the molded case circuit breaker open when receiving the trip signal. Traditional releases are divided into electronic releases and thermal magnetic releases, etc., which are generally installed inside the circuit breaker and cooperate with the drawbar of the molded case circuit breaker to realize the tripping action. [0003] At present, the tripper of the mo...

AI Technical Summary

Problems solved by technology

[0005] At present, for the 63A frame molded case circuit breaker, due to the small size of the 63A frame molded case circuit breaker, often the 63A frame thermal magnetic molded case circuit breaker does not have the overload adjustable function, or the circuit breaker with the overload adjustable function The overall volume of the release is relatively large, and the existing release modules are difficult to meet the requirements, or it is difficult to realize short-circuit protection, overload alarm and adjustable functions at the same time

[0006] In addition, in the existing circuit breaker structure, inserts or nuts are usually placed in the center of the arc extinguishing module, and there are mounting holes at the bottom of the base. When the module is fixed, the module is fixed on the base by screws. Part of the space of the module or base, which increases the overall height of the circuit breaker to a certain extent

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