Iec 60815-2 Pdf | 2026 |

Without this table, you are under-sizing your insulators by 30-40%, guaranteeing a flashover during the first dry fog season.

A key first step is to evaluate the at the proposed installation site. This involves assessing the expected level of pollution from sources like coastal salt, industrial emissions, desert dust, or agricultural sprays. The SPS is categorized into defined pollution classes (e.g., light, medium, heavy, very heavy).

These values assume a standard insulation profile. If using anti-fog (deep-rib) profiles, lower values may be permissible.

Typical cost: ~250–350 CHF (approx. $280–400 USD). iec 60815-2 pdf

): Evaluates how deeply corrugated the under-ribs of the porcelain or glass are. Deep ribs trap air pockets but can accumulate highly localized salt crusts in desert environments.

Older versions used "Nominal Specific Creepage Distance" based on phase-to-ground voltage. Modern versions use USCD based on phase-to-phase voltage. Mixing these up results in under-dimensioned insulation and imminent line flashovers.

No, this part is specifically for AC systems. Insulators for DC systems are covered by IEC TS 60815-4 and IEC TS 60815-5 . Without this table, you are under-sizing your insulators

: It prevents "over-engineering" where insulators are unnecessarily large and expensive, while ensuring they aren't so small that they risk frequent outages.

Simply meeting the required creepage distance is not enough. The physical shape—or profile—of the glass or ceramic sheds plays a massive role in how pollution accumulates and washes away. IEC 60815-2 outlines strict geometric parameters that engineers must evaluate, including: Shed Spacing (

To mitigate these risks, utility engineers and system designers rely on international standards to select the right insulator geometry and materials. The definitive standard for this process is , titled "Selection and dimensioning of high-voltage insulators intended for use in polluted conditions." The SPS is categorized into defined pollution classes (e

: High-density industrial zones, or coastal regions exposed to sea spray.

: Urban areas or regions close to heavy industrial plants.

The standard provides a structured, four-step objective to guide users through the selection process:

Obtaining the official IEC 60815-2 PDF is essential for execution because the standard contains critical calculation tools, including: : Graphs plotting the correction factor ( Ktcap K sub t ) against the average diameter ( Dmcap D sub m