Iec 60815-2 Pdf

The core formula provided in IEC 60815-2 for determining the required Unified Specific Creepage Distance ($L_us$) is generally expressed as:

Electrical insulation failure due to environmental pollution is a leading cause of power outages in high-voltage transmission and distribution systems. To mitigate this risk, the International Electrotechnical Commission (IEC) developed the IEC 60815 series. Specifically, IEC 60815-2 focuses on the selection and dimensioning of ceramic and glass insulators for alternating current (AC) systems operating under polluted conditions.

To successfully implement IEC 60815-2 during substation or transmission line design, follow this sequence:

2. Determination of the Unified Specific Creepage Distance (USCD)

Since I cannot provide a direct PDF download of the copyrighted standard, I have prepared a summarizing the key concepts, scope, and methodology defined in IEC 60815-2 . iec 60815-2 pdf

A common 146 mm/kV cap-and-pin unit has a creepage of ~320 mm. Number of units needed = 5510 / 320 = 17.2 → 18 units . A typical clean-air 132 kV string might use only 9-10 units. Pollution doubles the requirement.

Because IEC documents are protected by copyright, official copies must be purchased through authorized channels.

Geometric limits for standard, anti-pollution, and aerodynamic shed designs.

Note: These values are reference starting points. The standard provides curves and tables to adjust these based on specific insulator profiles. The core formula provided in IEC 60815-2 for

A significant update came with the , which replaced the 2008 version. Key technical revisions in the 2025 edition include:

Determining the minimum total creepage distance required based on the voltage and pollution class.

Ensuring the profile does not promote "shrouding," where dirt accumulates in tight, unwashed pockets. 4. Apply Correction Factors

is a critical technical specification that provides engineering guidelines for the selection and dimensioning of high-voltage ceramic and glass insulators intended for use in polluted outdoor AC environments . It serves as a practical bridge between environmental data—such as salt spray or industrial dust—and the physical design of electrical infrastructure. Overview of IEC TS 60815-2 To successfully implement IEC 60815-2 during substation or

Have you had a pollution flashover that could have been prevented by a higher creepage distance? Share your war stories in the comments below.

The IEC 60815 series of Technical Specifications includes several other parts that complement Part 2:

Based on the pollution class, the standard provides a table (Table 2 in the original document) that gives the (in mm/kV line-to-line voltage).

The copyright-protected IEC standard is a commercial document. Using an unofficial copy is a violation of intellectual property rights and may not be up-to-date. The official PDF can be purchased from several authorized sources. The cost can vary between vendors and by region, with a representative price of (as per ANSI Webstore) or £208.80 (as per a BSI-licensed vendor).

A: No legally free version exists. You can sometimes view previews (first 8-10 pages) on the IEC Webstore.

Before diving into the selection procedure, it is helpful to understand several key terms that appear throughout IEC 60815‑2.