: Before selecting an insulator, the Site Pollution Severity (SPS) must be determined (often categorized from "Very Light" to "Very Heavy").
Imagine you are a utility engineer tasked with replacing a failed glass insulator string on a 132 kV line running 8 km from a cement factory and 5 km from the coast. iec 60815-2 pdf
Areas close to industrialized cities or subjected to moderate coastal winds. : Before selecting an insulator, the Site Pollution
While the full text requires purchase, the document structure and key data points are known. It includes: While the full text requires purchase, the document
While Part 3 of the IEC 60815 series addresses polymeric (composite) insulators, Part 2 strictly governs cap-and-pin glass units, long-rod porcelain, and post porcelain insulators.
: It prevents "over-engineering" where insulators are unnecessarily large and expensive, while ensuring they aren't so small that they risk frequent outages.