Introduction: In transducer the installation in controlling ark enters line lightning arrester. The lightning arrester that take a line can use power source to prevent thunder module, slideway installation, shunt-wound ground connection. Module of this lightning arrester is clearance discharge, pound S) of μ of 15kA(10/350 of discharge electric current, working voltage 250V. Also can use on power supply cord paralell connection is pressed quick resistor prevents thunder. Cent of be struck by lightning is hit thunder and inductive thunder continuously. Attack Lei Shilei report to fall on content of be struck by lightning directly continuously, the destruction of generation is the biggest the inductive maximum pressure that the electromagnetic wave that; induction thunder is thunder generation generates on conductor, make join the electric equipment to conductor passes to press and damage. On electrified wire netting, had installed multistage lightning arrester, but before the thunder induction voltage near the remaining voltage of class thunder or transducer still can be caused to transducer destroy. Solution: In transducer the installation in controlling ark enters line lightning arrester. The lightning arrester that take a line can use power source to prevent thunder module, slideway installation, shunt-wound ground connection. Module of this lightning arrester is clearance discharge, pound S) of μ of 15kA(10/350 of discharge electric current, working voltage 250V. Also can use on power supply cord paralell connection is pressed quick resistor prevents thunder. CNC Milling