Electrical protection device for electric appliance and electric appliance

Abstract

The application provides an electrical protection device for an electric appliance and the electric appliance. The electrical protection device comprises a ground wire fault detection circuit, a zeroline and live wire fault detection circuit, a control unit, an electrical protection unit and a fault information processing unit, wherein the ground wire fault detection circuit is connected betweena ground wire and a zero line and used for detecting whether the ground wire has an electrical fault, the zero line and live wire fault detection circuit is connected between the zero line and a livewire and used for detecting whether the zero line and / or the live wire has the electrical fault, and when the ground wire fault detection circuit and / or the zero line and live wire fault detection circuit detect(s) the electrical fault, the control unit controls the electrical protection unit to turn off a power supply and controls the fault information processing unit to process electrical faultinformation. According to the scheme, when the electrical faults of the wire, the zero line and the live wire are detected, the power supply is controlled to be cut off, the fault information is processed, and troubleshooting is more timely and effective.

Description

technical field [0001] The present application relates to the field of electrical equipment, in particular to an electrical protection device and electrical equipment. Background technique [0002] According to the requirements of the national standard, electrical equipment (such as air conditioners, refrigerators, washing machines, etc.) must be grounded. When the insulation of electrical equipment products is damaged, the metal casing may be charged. Once the human body touches the metal casing, the human body will form a loop between the metal casing and the earth, that is, current will flow through the human body. If it is properly grounded, because the grounding resistance of the equipment is usually less than 0.1Ω, most of the current is bypassed by the grounding resistance to avoid electric shock damage caused by large current passing through the human body. [0003] However, the grounding resistance of the ground wire of the power supply grid is not ideal at present...

AI Technical Summary

Problems solved by technology

If people touch the metal shell of electrical equipment, it is easy to cause electric shock injury

In addition, the residential power grid in some rural areas is not grounded, which makes the grounding of electrical equipment invalid. If people touch the shell with strong current leakage, it will inevitably cause electric shock injury.

[0004] The current zero-fire electrical protection circuit usually only detects electrical faults in the neutral wire, live wire, and ground wire (including leakage, arc fault, overcurrent, poor electrical connection, aging line, insulation damage, live wire, grounding invalid, etc.) When the incident occurs, the countermeasures of cutting off the power supply are taken without further treatment, resulting in the failure to solve the accident in a timely and effective manner

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