Patent ID: 7451012

Claim:
A fault electric arc protection circuits system comprising a power source, wherein the circuits system comprising: signal sample device for sampling current signals simultaneously, and output the sampled signals; signal processing module for processing the sampled signals, and output processed results; arc detecting control device for receiving the processed results from the signal processing module, and detecting the results and determining whether to output control signals or not; and power supply cutting off module for cutting off the power supply according to the control signals from the arc detecting control device, wherein said signal sampling device comprising a matching resistor and a current transformer without iron core: said signal processing module comprising a rectifying tube and a voltage divider; said arc detecting control device is a single chip micyoco; said power cut-off module comprising a set of audion that orderly connected, and an actuator portion; one end of the current transformer is grounded and an other end is connected with the rectifying tube thus to connect to the single chip micyoco; the matching resistor is coordinately connected between the rectifying tube and the current transformer, and the voltage divider is coordinately connected between the rectifying tube and the single chip micyoco.