Circuit protection device for automatically monitoring operation disturbance

Abstract

The invention relates to a circuit protective device which automatically monitors operation faults; the circuit protective device comprises an interrupter protective device of a grounding fault circuit, a grounding fault test circuit, a drive module, a solenoid loop and a circuit module which automatically monitors the operation faults; the circuit module which automatically monitors the operation faults consists of a main control system, a monitoring system and an indicating system. The main-control system is connected on the N wire of a power; the monitoring system is connected on the anode of Q1 and the base electrode of Q3; the indicating system is connected on the two input power contact pins of the solenoid loop. The input end and the output end of the circuit module which automatically monitors the operation faults are connected with the output end of the interrupter protective device of the grounding fault circuit; the output end of the circuit module which automatically monitors the operation faults is connected with the input end of the interrupter protective device of the grounding fault circuit; the input end of the circuit module which automatically monitors the operation faults is connected with output end of the drive module; the main-control system can form a periodical clearance concussion pulse; the monitoring system forms an interlocking amplifier and a comparator.

Description

technical field [0001] The invention relates to a circuit protection device for automatic monitoring of operating faults, in particular to a ground fault circuit interrupter (Ground Fault Circuit Interrupter, GFCI), which can automatically monitor the normal operation of the ground fault circuit interrupter in the whole process, and A circuit protection device that issues a warning signal of an interrupter failure. Background technique [0002] The ground fault interrupter will sense the fault when it is short-circuited to the ground, or it will automatically trip when there is a ground leakage fault, and disconnect the input terminal contact from the load terminal, thereby avoiding the occurrence of life-threatening electric shock events. [0003] A number of reasons can cause a ground fault interrupter to malfunction, causing the electrical and mechanical components of the device to fail to open. For example, due to mechanical wear, corrosion of mechanical parts or overlo...

AI Technical Summary

Problems solved by technology

[0005] The disadvantage of this type of device is that the circuit breaker must be manually triggered periodically, which increases the work intensity

Especially in the presence of a large number of circuit breakers, the workload is very large

Second, there is still a shock hazard if the circuit breaker fails between triggering of the fault test

Third, if the circuit breaker has failed, it cannot send a warning signal before triggering the test

Fourth, the trigger test itself must interrupt the power supply between the power source and the load, causing inconvenience to the user of the load

Images