Patent ID: 7518839

Claim:
An arc discharge protection apparatus operating in a current detection mode to prevent arc discharge caused by an abnormal condition in a high voltage output zone which has a power supply unit to provide power supply, a control unit to provide voltage distribution signals, a driving unit to receive the power supply and the voltage distribution signals and transform voltage, a step-up transformer to receive and transform the transformed voltage to a higher voltage, and a load connecting to a high voltage output end of the step-up transformer, comprising: a current signal sampling unit connecting to the high voltage output zone to receive an arc discharge current signal generated in the high voltage output zone, the current signal sampling unit being a linear, coil resistance circuit connecting to the high voltage output zone and the current signal sampling unit is further connected to a deviation DC isolating circuit; an interpretation unit to receive the arc discharge current signal and provide a determination level to sift out an abnormal current frequency signal; a commutation unit to receive the abnormal current frequency signal from the interpretation unit and perform rectification and output an arc DC signal; and a touch control unit driven by the arc DC signal to stop operation of the high voltage output zone to prevent the arc discharge.