I ncreasing probability of lightning strike and serious pollution induce more insulator flashovers to harm the safety and stable operation of power systems.To prevent insulator flashover accident

our research group developed a new type of arcing horn with an active arc-extinguishing device.A large number of tests show that the arcing horn can significantly restrain power frequency current to reliably extinguish arc for protecting insulators from damage due to flashover even if short circuit current flows through the air gap.