| Type |  | 20NF630 | 
| Material |  | Porcelain | 
| Glaze Color |  | Brown | 
| Nominal Creepage Distance (mm) |  | 475 | 
| Arcing Distance (mm) |  | 310 | 
| Number of Sheds |  | 3 | 
| Nominal Current (A) |  | 630 | 
| Power Frequency Flashover Voltage (kV) | Wet | 85 | 
| Dry | 120 | 
| Power Frequency Withstand Voltage (kV) | Wet | 70 | 
| Dry | 120 | 
| Weight (kg) |  | 5.5 |