Insulators on transmission lines are used to support conductors as well as separate them electrically from the towers and poles. Insulators used in Transmission Lines must avoid current flow to the ground are exposed to high levels of voltage stress, and must support the mechanical stresses due to the weight of the conductors as well

Although pin insulators and post insulators support and insulate conductors, they serve different purposes. Pin insulators are typically used on poles in low and medium voltage distribution lines. In contrast, post insulators are used when greater mechanical strength and higher voltage levels are needed. Therefore, post insulators are usually found in switchyards and substations, where

Insulators made out of porcelain or polymer are both commonly used in power systems, but polymer vs porcelain insulator comparison is important to use their best  advantages. Porcelain insulators were built with high mechanical strength and have long service life and have high proven performance over a number of decades. In comparison, polymer insulators have