Overload alarm non-tripping device of molded case circuit breaker

Abstract

A molded case circuit breaker overload alarm non-tripping device, which includes a transmission mechanism bracket (1), a support shaft (2) is installed on the movement mechanism bracket (1), a short circuit protection drawbar (3) and an overload alarm drawbar ( 4) are set on the support shaft (2) and can rotate around the support shaft (2) without interfering with each other. The overload alarm drawbar (4) is linked with the adjustable touch piece (5), and can be activated by the adjustable touch piece (5) Pushing to rotate around the support shaft (2), the overload alarm drawbar (4) can trigger the alarm signal collection and output device (6) during the rotation process, and the adjustable touch piece (5) is installed on the bimetallic sheet (7) On the top, the bimetal (7) is installed together with the heating element (8), and the heating of the heating element (8) can deform the bimetal (7) to drive the adjustable touch piece (5) to push the overload alarm drawbar (4) Rotation; in the present invention, the overload alarm drawbar is installed inside the short circuit protection drawbar, which reduces the installation space of a drawbar, makes the structural space more compact, meets the structural needs of small molded case circuit breakers, and is simple and easy to assemble.

Description

technical field [0001] The invention belongs to the technical field of low-voltage electrical equipment, and specifically relates to an overload alarm device for a molded case circuit breaker, in particular to a non-tripping device for an overload alarm device for a molded case circuit breaker. Background technique [0002] Molded case circuit breaker is a low-voltage circuit protection device with overload, short circuit and undervoltage protection functions. There are many types of circuit breakers, among which molded case circuit breakers are more commonly used, and the outer casing is made of plastic insulators, which are used to isolate the conductor and the grounding metal part. When the current exceeds the set value, the molded case circuit breaker can automatically cut off the current to protect the load. However, in specific applications, the circuit breaker needs to provide a special protection function in some special applications, that is, when the distribution ...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide an overload alarm non-tripping device for molded case circuit breakers, aiming at the technical defect that the existing overload alarm non-tripping device of molded case circuit breaker occupies a large space and cannot be applied to small molded case circuit breakers. The overload alarm drawbar is installed inside the short-circuit protection drawbar, reducing the installation space of a drawbar, making the structural space more compact, saving space, meeting the structural needs of small molded case circuit breakers, and being simple and easy to assemble

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