How to distinguish between insulators and lightning arresters on poles and towers

Distinguish from the shape: the insulator is an umbrella shaped ceramic sleeve, which looks like a tower from below, and the lightning arrester is a needle-like metal rod.

Distinguish from the color: the insulator is installed 2-5 meters below the top of the pole tower, on both sides of the pole tower, each side of each phase has one; The lightning rod installation position is vertical at the top of the pole tower, and each pole tower is only one.

Arrester is a conductive material, arrester is installed in high-rise buildings and flammable objects above, the lightning current through the path to the ground, shunt.

An insulator is a non-conductive substance