Table 1 Volcanic ash contamination scenarios under moist conditions based on Wardman et al. (2014) and applied to both ANSI 52–3 insulator types (porcelain and glass) with ash from Cotopaxi-2015 and Tungurahua-2016 eruptions. Top and bottom refer to ash cover thickness on the bottom and top of the insulators
Ash-scenario | Top (mm) | Bottom (mm) |
|---|---|---|
1 | 1 | 0 |
2 | 3 | 0 |
3 | 6 | 0 |
4 | 1 | 1 |
5 | 3 | 1 |
6 | 6 | 1 |