High pressure insulators are equipped with Arcing Horns. The function of Arcing Horns is to protect the transformer against sudden voltage surges and transfer excess voltage to the ground through the grounded body of the transformer. The distance between the two poles of the Arcing Horns can be adjusted according to the amount of the largest shock voltage that can be tolerated and the height of the transformer installation from the sea level.

The metal used in this product is standardized plating to prevent rust.