Take HY5WS-17/50 as a example:H-compound coat in organism;Y-metle oxide lightning arrester;5-The mark calls to turn on electricity the electric current(KA);W- The W mean to have no cleft,The C means to establish the cleft;S-The S means to go together with the electricity,Z electricity stands;D electrical engineering type R electrical capacity type
17-avoidingthe thunder sun settles the electric voltage(KV)
50-The mark calls to turn on electricity electric current bottom biggest press(KV)


The zinc oxide arrester applies to protect the electrical equipment in AC power system against the resulted from atmospheres over-voltage ang operational over-voltage.