Residual current operated circuit breaker with self-checking function

Abstract

The invention discloses a residual current operated circuit breaker with a self-checking function. The residual current operated circuit breaker comprises a housing which is internally provided with aPCB control circuit assembly board, a residual current protection release, a zero sequence current transformer, an alarm indicating lamp, and a buzzer, wherein a main control chip and a silicon controlled rectifier connected with the main control chip are arranged on the PCB control circuit assembly board, the silicon controlled rectifier is simultaneously connected with the residual current protection release, and the zero sequence current transformer, the alarm indicating lamp and the buzzer are respectively connected with the main control chip. The residual current operated circuit breakeris advantaged in that, compared with the prior art, the residual current circuit breaker with the self-checking function can automatically perform periodic self-checking on whether faults exist or not without manual intervention, so power utilization safety of a user is further ensured, an electric connection state of the main circuit cannot be disconnected in the self-checking process, and powersupply continuity of related equipment can be ensured.

Description

technical field [0001] The invention relates to a circuit breaker, in particular to a residual current operated circuit breaker with self-checking function. Background technique [0002] The residual current operated circuit breaker has been widely used as an important protection device in the low-voltage power distribution system to prevent electric shock accidents and electrical equipment leakage damage. However, in practical applications, due to non-standard installation configuration, poor product quality and other reasons, the circuit breaker is damaged or the leakage protection function fails, which leads to personal injury accidents or equipment damage accidents. Therefore, in order to ensure that the leakage protection function of the circuit breaker is effective, the traditional inspection method requires manual intervention to operate a test button provided on the circuit breaker to verify the ability of the circuit breaker to respond to the ground fault. [0003]...

AI Technical Summary

Problems solved by technology

However, in practical applications, due to improper installation and configuration, poor product quality, etc., the circuit breaker is damaged or the leakage protection function fails, which leads to personal injury accidents or equipment damage accidents.

Therefore, in order to ensure that the leakage protection function of the circuit breaker is effective, the traditional inspection method requires manual intervention to operate the test button on the circuit breaker to verify the ability of the circuit breaker to respond to ground faults

[0003] However, in fact, most users will not regularly perform functional verification operations on circuit breakers because they think the operation is troublesome, and the manual operation of the test button will interrupt the continuity of power supply to the equipment, or cause economic losses to users

In addition, even if the user is willing to manually verify the function of the circuit breaker every month, the verification cycle in units of months is too long. If the leakage protection function of the circuit breaker fails within a month, it will bring great harm to the user's power consumption. electrical safety hazards

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