Release and circuit breaker including same

Abstract

The invention discloses a release and a circuit breaker including the same. The release includes a housing and a tripping mechanism disposed at the top of the housing. The tripping mechanism comprises an overload fault indicating rod rotatable between a normal operating position and an alarm position and a tripping rod rotatable between the normal operating position and a tripping position. The overload fault indicating rod and the tripping rod are installed coaxially and can rotating relatively, and when the overload fault indicating rod rotates from the normal operating position to the alarm position, the tripping rod remain at the normal operating position. Thus, according to the invention, through the simple coaxial structure, the functions of overload alarming without tripping and short circuit tripping are achieved, and an increase in the overall size of the release is not required.

Description

technical field [0001] The present invention generally relates to a circuit breaker, and in particular to a release with overload alarm but no tripping function and a circuit breaker including the release. Background technique [0002] Circuit breakers are commonly used safety protection devices in electrical circuits. Current circuit breakers generally trip when overload and short-circuit faults occur in the circuit, thereby cutting off the fault current in the circuit. However, in special places where continuous power supply is necessary, such as places related to fire protection, chemical industry and medical treatment, when the load of the main circuit is overloaded, the circuit cannot be cut off generally, but an alarm signal needs to be output; but when the load of the main circuit has a short-circuit fault , the circuit should be cut off immediately. At this time, the circuit breaker needs to have the function of overload alarm but not tripping. [0003] In order to...

AI Technical Summary

Problems solved by technology

[0006] However, the alarm mechanism in Patent Document 1 is an additional mechanism independent of the trip mechanism, thereby increasing the structural complexity and cost of the entire circuit breaker, and also increasing the overall size of the circuit breaker

The alarm mechanism of Patent Document 2 also needs to add an additional mechanism that allows the micro switch to rotate, and the weight and volume of the micro switch are relatively large, resulting in an increase in the weight to be pushed by the bimetallic strip, which reduces the sensitivity of the alarm mechanism. Similarly, The overall size of the circuit breaker increases due to the need to add a mechanism to turn the micro switch

In Patent Document 3, after the tripping mechanism is locked, even if a short circuit occurs, it will not trip and cause potential danger, and after the tripping mechanism is released, it no longer has the function of alarming and not tripping. In addition, in Patent Document 3, an alarm mechanism needs to be added to the trip bar, resulting in a complex structure, resulting in high cost and increasing the overall size of the circuit breaker

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