How many types of arc faults are there? Arc faults are usually common in the lighting and socket circuits of the final section of the line. The main types of faults include series arc, parallel arc of phase conductor to neutral conductor, parallel arc of phase conductor to ground conductor, and fault arc to ground. Among them, the grounding fault arc cannot be simply understood as a grounding fault and is protected by grounding fault protection appliances. The generation mechanism and characteristics of the grounding fault arc are fundamentally different from those of the grounding fault. Therefore, a specialized detection circuit for the arc fault protection appliance is needed to monitor and make protection tripping judgments. What is an arc fault protection appliance? Arc fault protection device is a type of device that constantly monitors the voltage and current waveforms of the fault arc in the circuit through an embedded detection system, and compares them with the set values. When the voltage and current waveforms that meet the requirements exceed the action value, the fault circuit is cut off, and the fault arc is extinguished before the fault arc causes a fire
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