A lightning arrestor or Surge Arrestor is a device to protect electrical equipment from over voltage transients caused by External (Lightning) or Internal (Switching) Events.
The typical lightning arrestor has a high voltage terminal and a ground terminal. At normal voltages the MOV (Metal Oxide Varister) disc is an insulator and will not conduct current. But at higher voltages caused by lightning it becomes a conductor and helps to pass the voltage to earth via its ground terminal
|S.No||Product Rating||Arrester Rating||Current Rating||Class of Arrester|
|1||11 kv||9 kv||5 KA||Distribution|
|2||22 kv||18 kv||5 KA||Distribution|
|3||33 kv||30 kv||5 KA||Distribution|