Alternating-current null-line and firing-line reverse connection and ground line abnormality detection circuit

Abstract

The invention relates to an alternating-current null-line and firing-line reverse connection and ground line abnormality detection circuit. The alternating-current null-line and firing-line reverse connection and ground line abnormality detection circuit mainly comprises a null-line and firing-line reverse connection detection loop, a ground line abnormality detection loop and a signal output loop, wherein a signal output end of the null-line and firing-line reverse connection detection loop and an output end of the ground line abnormality detection loop are respectively connected with the signal output loop; a PE input end of the ground line abnormality detection loop is respectively connected with an L input end and an N input end, and the signal output loop is connected with a power consumption device controller. The null-line and firing-line reverse connection identification function and the ground line abnormality identification function are integrated, under the situation of the reverse connection of a null line and a firing line and / or abnormality of the ground line, a fault can be accurately judged, and a signal is outputted to the controller of the power consumption device, the controller can take measures to power off the power consumption device in time, the power consumption safety of users can be effectively guaranteed, and the personal injury and death accident can be reduced.

Description

technical field [0001] The invention relates to the technical field of detection circuits, in particular to a detection circuit for reversed connection of neutral and live wires of alternating current and abnormality of ground wires. Background technique [0002] In the modern life where household appliances are widely used, the current situation of my country's household electricity consumption environment is becoming more and more unoptimistic. Situations such as reverse connection of zero live wire and abnormal ground wire (including no grounding, unreliable grounding, and electrified ground wire) have become frequent occurrences. question. In this case, once the electric leakage of household appliances is used, the housing of the household appliances will be electrified, which will eventually cause electric shock and injury accidents. In the prior art, there is a circuit for separately judging the reverse connection of the zero and live wires or a circuit for separately ...

AI Technical Summary

Problems solved by technology

In this case, once the electric leakage of household appliances is used, the housing of household appliances will be charged, which will eventually cause electric shock and injury accidents.

In the prior art, there is a circuit for separately judging the reverse connection of the zero and live wires or a circuit for separately judging the abnormality of the ground wire. The two circuits output signals through different output modes, and the structure is complex and cannot detect multiple faults at the same time.

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