A leakage protection device with arc detection function and electrical equipment

Abstract

The invention discloses a leakage protection device and electrical equipment with arc detection function, which are provided with a power supply circuit, a controller, a switch circuit, a leakage detection circuit, a series arc detection circuit and a parallel arc detection circuit; The detection circuit, the series arc detection circuit and the parallel arc detection circuit detect the leakage fault and arc fault of the AC input power supply, and when any fault is detected, the control switch circuit cuts off the AC power supply line between the AC input power supply and the AC load, and implements failsafe. The leakage protection device of the present invention can realize the live detection of the shell and the ground wire, the reverse connection detection of the live wire and the ground wire, and the detection and protection of abnormal conditions such as series arcs and parallel arcs, etc. It provides comprehensive protection, solves the problem of accidental power-off of electrical equipment caused by misoperation of existing leakage protection products, and significantly improves the reliability of electrical equipment operation.

Description

technical field [0001] The invention belongs to the technical field of fault detection, and in particular relates to a circuit design for detecting and protecting leakage faults and arc faults of AC power supply lines. Background technique [0002] At present, the situation of my country's power grid is complex, and there are many potential safety hazards. Problems such as incorrect wiring of household electrical sockets, poor grounding, and low-quality wires will cause abnormalities in the AC power supply connected to household appliances, which in turn affects the use of household appliances. Electrical safety not only poses a fatal threat to the normal operation of home appliances, but even endangers the personal safety of users, leading to personal electric shock accidents. [0003] When household appliances are connected to the AC power grid, there are two most common power supply faults: one is arc fault; the other is leakage fault. The arc fault is usually caused by t...

AI Technical Summary

Problems solved by technology

[0009] In order to solve the problem of single function of the existing leakage protection device, the present invention proposes a leakage protection device with arc detection function, which can implement comprehensive detection and timely protection for arc faults and leakage faults that occur in the electrical environment of household appliances

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