Electric equipment arc fault protection device and electric equipment control system

Abstract

The invention provides an electric equipment arc fault protection device and an electric equipment control system. The device comprises a circuit breaking protector which is arranged on the power supply line of electric equipment; a current detection circuit which is used for detecting the working current of the electric equipment; and an arc detection microprocessor of which the input end is connected with the output end of the current detection circuit, wherein the output end of the arc fault detection microprocessor is connected with the control end of the circuit breaking protector. According to the device, the working current of the electric equipment is automatically sampled through a sampling circuit, the sampling current is transmitted to the arc fault detection microprocessor, and the arc fault detection microprocessor performs fault arc judgment according to the sampling current and controls the circuit breaking protector to be disconnected when the judgment result indicates the fault arc of the electric equipment so that disconnection protection can be performed on the electric equipment, and thus the fault arc of the electric equipment can be timely discovered and disconnection protection can be performed on the electric equipment.

Description

technical field [0001] The invention relates to the technical field of equipment working condition detection and protection, in particular to an arc fault protection device for electrical equipment and a control system for electrical equipment. Background technique [0002] With the improvement of the quality of life, electrical equipment such as air conditioners and refrigerators have gradually entered thousands of households. The internal circuits of these devices are complex. Due to aging circuits or substandard internal components, there may be poor electrical connections or internal circuits due to insulation. The problem of arc fault due to aging. Common causes of arc faults are as follows: [0003] 1. Sharp devices pierce the power cord and cause the insulation layer to be damaged; [0004] 2. Welding, loosening or oxidation of the middle line of the connecting line and the line joint, resulting in excessive contact resistance and high heat generation. [0005] 3. ...

AI Technical Summary

Problems solved by technology

[0003] 1. Sharp devices pierce the power cord and cause the insulation layer to be damaged;

[0004] 2. Welding, looseness or oxidation of the middle line of the connection line and the line joint, resulting in excessive contact resistance and high heat generation

[0005] 3. Failure to use correct protection devices, such as circuit breakers, etc.

[0006] 4. Aging of wire insulation leads to breakdown of insulation layer

[0007] The commonly used method to prevent arc fire is to install an air switch (such as a circuit breaker) to protect the electrical equipment. When the power supply data of the electrical equipment is abnormal, the air switch is controlled to be disconnected. The power supply current of the equipment protects the electrical equipment. When a fault current occurs in a certain device in the electrical equipment, the equipment cannot be protected immediately. Only when the fault current is reflected in the power supply current of the electrical equipment and makes the power supply Only when the current meets the set breaking condition can the device be protected against power failure. If the supply current does not meet the breaking condition, the circuit breaker cannot protect the electrical equipment. Therefore, the reliability of the traditional technical solution is poor. , it is impossible to guarantee timely power-off protection for the equipment when there is a fault arc in the electrical equipment

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