IEC 60815-2 is titled "Selection and dimensioning of high-voltage insulators intended for use in polluted conditions – Part 2: Ceramic and glass insulators for a.c. systems."
By following this rigorous methodology, engineers can avoid the costly consequences of under-specifying (leading to frequent flashovers) or over-specifying (leading to unnecessary material costs and taller support structures).
Adjustments for whether an insulator is mounted horizontally or vertically. Standard Evolution Previous Version: Replaced the older IEC/TR 60815 (1986). iec 60815-2 pdf
The Chinese version maintains the same logical structure (scope, terms, principles, site severity, RUSCD determination, profile selection, parameter checking, corrections, minimum creepage distance, test verification) but adapts the illustrative examples to reflect local insulator designs. This shows how a well‑crafted IEC document can be localised without losing its technical integrity.
The standard is structured to guide engineers through a systematic approach to insulator design. 1. Definition of Pollution Classes (SPS) IEC 60815-2 is titled "Selection and dimensioning of
It provides a uniform method that is recognized internationally, simplifying communication between design engineers, manufacturers, and utility operators.
): The horizontal distance the shed extends from the insulator core. The standard dictates that the ratio must be greater than or equal to for optimal self-cleaning via natural rainfall. Creepage-to-Clearance Ratio ( The standard is structured to guide engineers through
: Prevents electrical bridging between sheds during heavy rain.
): The vertical distance between two consecutive sheds. If sheds are too close, heavy rain can bridge the gap, shorting out the creepage path. Shed Projection (