Polymer insulators, also known as composite insulators, are electrical insulators made from a combination of polymer materials and fiberglass reinforced rods. They are widely used in various electrical applications, including overhead power lines, substations, and electrical equipment. Here are some reasons why polymer insulators are preferred over porcelain insulators in certain applications: That being said, porcelain insulators still have some advantages over polymer insulators in certain applications. Porcelain insulators are highly resistant to ultraviolet (UV) radiation, making them suitable for outdoor installations exposed to direct sunlight. They also have lower thermal expansion coefficients, which may be advantageous in some specific …