Where are polymer insulators most commonly located?

Polymer insulators are most commonly located at dead end structures due to their lightweight properties and high performance in varying weather conditions. Dead end structures experience significant tension and mechanical stress, as they must support the weight of the conductors while also resisting the pull from the tensioned lines on either side. Polymer insulators, which often utilize materials like silicone rubber or other composites, offer flexibility, resistance to cracking, and reduced risk of breakage compared to traditional ceramic or glass insulators. This makes them particularly well-suited for the rigorous demands of dead end structures, where they effectively maintain insulation integrity while also facilitating the necessary physical strength required for support.

In contrast, while polymer insulators can be utilized at transmission lines, junction boxes, and distribution poles, they are not as specialized for these applications as they are for dead end structures. Each of those other locations may have different requirements or use a variety of other insulator types based on factors like voltage levels, environment, and structural needs.