| Feature | Old IEC 60815 (1986) | IEC 60815-2 (Current) | | :--- | :--- | :--- | | | I, II, III, IV (Light to Very Heavy) | a, b, c, d, e (Expanded range) | | Creepage Factor | Single value per class (e.g., 25 mm/kV for Class IV) | Range of values (e.g., 31-43 for Class d) | | AC/DC Mixing | Combined | Separated (Part 2 is strictly AC) | | Test Correlation | Weak link to salt fog tests | Direct link to solid layer and clean fog tests |
It provides specific guidelines for choosing the right size and shape of ceramic and glass insulators to prevent flashovers caused by environmental pollution (salt, dust, chemicals). iec 60815-2 pdf
Elena reached for her tablet and pulled up , the international standard specifically for selecting and dimensioning high-voltage insulators for polluted conditions. | Feature | Old IEC 60815 (1986) |
If you are looking for the actual document rather than a narrative, here is what it covers: These are almost always illegal, outdated, or corrupted
A quick internet search reveals hundreds of "free PDF" sites offering this document. These are almost always illegal, outdated, or corrupted with malware. The International Electrotechnical Commission (IEC) protects its copyright aggressively.
If an insulator profile is particularly efficient or inefficient, correction factors are applied to the base USCD to ensure the final design is robust. Why Engineers Seek the IEC 60815-2 PDF