is a technical specification titled "Selection and dimensioning of high-voltage insulators intended for use in polluted conditions – Part 2: Ceramic and glass insulators for a.c. systems" . It provides detailed guidance on choosing and sizing porcelain and glass insulators based on the specific pollution levels of their operating environment. Scope and Application
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