Designed with a stress on high safety, this device has a built-in gas-charging surge arrestor element which discharges and grounds the surge at the moment the surge voltage exceeds a specified level. 1/4 wavelength short circuit principle for good protection effect. Simple structure, strong, easy installation. This device makes the actions of surge discharge and restoration as repeatedly as necessary. No replacement is practically needed . The coaxial construction of this device assures excellen
