The AS Series of Arrester blocks is primarily designed to be used as the surge suppression element within a lightning arrester assembly. These arrester blocks provide the high peak surge current and energy ratings required for the protection of high voltage AC power utility distribution systems. Typically, these devices are placed within a special arrester housing provided by the customer, and stacked to achieve the necessary continuous working voltage ratings for the specific application. (See the CA or NA series of Varistor discs for lower voltage and energy applications.)