| Insulator type | AC Anti-pollution type (double-shed) | ||||
| GB standard No. | XWP1-70 | XWP2-70 | XWP2-70C | XWP3-70 | |
| Fig | 1 | 1 | 2 | 1 | |
| Specified mechanical load (kN) | 70 | ||||
| Class | U70BEL | U70BL | U70C | U70BELP | |
| Nominal unit spacing (mm) | 160 | 146 | 146 | 160 | |
| Nominal diameter (mm) | 255 | 255 | 255 | 280 | |
| Nominal creepage distance (mm) | 400 | 400 | 400 | 450 | |
| Ball & socket size | 16 | 16 | 16C | 16 | |
| Electro mechanical failing load (kN) | 70 | 70 | 70 | 70 | |
| Mechanical routine test load (kN) | 35 | 35 | 35 | 35 | |
| Power frequency withstand voltage | Dry kV | 80 | 80 | 80 | 80 |
| Wet (kV) | 42 | 42 | 42 | 42 | |
| Lightning impulse withstand voltage (kV) | 120 | 120 | 120 | 120 | |
| Power frequency puncture voltage (kV) | 120 | 120 | 120 | 120 | |
| Radio interference voltage | Test voltage to ground (kV) | 10 | 10 | 10 | 10 |
| Max . RIV at 1MHz (μV) | 50 | 50 | 50 | 50 | |
| Weight (kg) | 5.9 | 5.9 | 6.0 | 7.0 | |
| Applicable standard: GB IEC AS BS IS | |||||
