Circuit breaker and tripping device thereof

Abstract

The invention discloses a circuit breaker and a tripping device thereof. The tripping device comprises a tripping assembly and an indicating assembly, the indicating assembly is provided with an indicating piece capable of extending out through an indicating port in a shell of the circuit breaker, and the indicating piece is in linkage with a tripping pull rod and can move in the second direction so as to be switched between an extending working position and a retracting working position. The tripping device is configured as follows: when the tripping pull rod is located at the tripping working position, the indicating piece is switched to the extending working position; and when the tripping pull rod is located at the initial working position, the indicating piece is switched to the withdrawing working position. By applying the scheme, a maintainer can conveniently and quickly judge the under-voltage tripping state so as to effectively accelerate power supply recovery and provide a good technical guarantee for ensuring power utilization in production and living.

Description

technical field [0001] The invention relates to the technical field of electrical switches, in particular to a circuit breaker and a tripping device thereof. Background technique [0002] The circuit breaker is mainly used for the overcurrent protection of the line, and at the same time, it can monitor the abnormal power supply voltage through functional accessories, such as common undervoltage release accessories. Usually, the accessories of the undervoltage release are assembled inside the circuit breaker. When it is detected that the main circuit voltage is lower than the requirements of the accessories, the undervoltage release will act, drive the circuit breaker mechanism to unlock, and the circuit breaker will be disconnected to achieve the protection function. [0003] Usually, after the protection action of the existing undervoltage release is executed, it is generally difficult for maintenance personnel to immediately determine the cause of the tripping of the circu...

AI Technical Summary

Problems solved by technology

[0003] Usually, after the protection action of the existing undervoltage release is executed, it is generally difficult for maintenance personnel to immediately determine the cause of the tripping of the circuit breaker when they arrive at the scene

Based on the factors that lead to tripping, including line overload or short circuit, etc., it is necessary to analyze and judge to confirm the actual cause of tripping, which greatly prolongs the time for restoring power supply and adversely affects production and life.

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