| Insulator type | AC normal type | ||
| GB standard No. | XP-40C | XP-40 | |
| Fig | 1 | 2 | |
| Specified mechanical load (kN) | 40 | ||
| Class | U40C | U40BL | |
| Nominal unit spacing (mm) | 140 | 110 | |
| Nominal diameter (mm) | 190 | 175 | |
| Nominal creepage distance (mm) | 200 | 185 | |
| Ball & socket size | 11 | ||
| Electro mechanical failing load (kN) | 40 | 40 | |
| Mechanical routine test load (kN) | 20 | 20 | |
| Power frequency withstand voltage | Dry kV | 55 | 55 |
| Wet (kV) | 30 | 30 | |
| Lightning impulse withstand voltage (kV) | 75 | 75 | |
| Power frequency puncture voltage (kV) | 90 | 90 | |
| Radio interference voltage | Test voltage to ground (kV) | 7.5 | 7.5 |
| Max . RIV at 1MHz (μV) | 50 | 50 | |
| Weight (kg) | 2.5 | 2.3 | |
| Applicable standard: GB IEC AS BS IS | |||
