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| Standard | Title | |----------|-------| | | General principles, definitions, and pollution classes | | IEC 60815-3 | DC application for ceramic/glass insulators | | IEC 60815-4 | Polymeric insulators for AC/DC | | IEC 60507 | Artificial pollution tests (salt fog) | | IEC 60513 | Fundamental design considerations for HV insulators |
Once the SPS class is locked in, IEC 60815-2 provides a baseline USCD value (expressed in mm/kV). The creepage distance is the shortest path along the surface of the insulating material between two conductive parts.
: High-density industrial zones, or coastal regions exposed to sea spray.
Note: For very severe cases (>2.0 mg/cm² ESDD), custom dimensioning or mitigation (e.g., washing, coating) is required. iec 60815-2 pdf
Common principles and global guidelines for both AC and DC systems.
If you are working on a specific design project, please let me know:
Determine the environmental conditions (e.g., coastal salt, industrial dust, or desert sand). Determine SPS Class: | Standard | Title | |----------|-------| | |
Because they lack the hydrophobic (water-repelling) transfer properties of composite materials (covered in Part 3), glass and porcelain require:
IEC 60815-2 is the industry standard for selecting ceramic (porcelain) and toughened glass insulators for high-voltage AC systems. It replaces the older "creepage distance" approach (formerly found in IEC 60815:1986) with a more sophisticated .
$$L_us \ge L_ref \times K_ad \times K_cs \times \dots$$ Note: For very severe cases (>2
The standard introduces correction factors to adjust USCD based on:
Ensure the insulator profile and length can handle localized contamination without triggering an arc.