Pollution Levels Classification IEC 60815
IEC Technical Specification 60815-1 :2008
Selection and dimensioning of high-voltage insulators intended for use in polluted conditions
- Part 1: Definitions, information and general principles
Pollution levels
Pollution level | Creepage distance Phase - Ground voltage mm/kV | Creepage distance (Old) Phase - Phase voltage mm/kV |
a - Very light | 22.0 | - |
b - Light | 27.8 | 16 |
c - Medium | 34.7 | 20 |
d - Heavy | 43.3 | 25 |
e - Very Heavy | 53.7 | 31 |