| Insulator type | AC anti-pollution type | ||||
| GB standard No. | XHP-120 | XHP1-120 | XHP2-120 | XHP3-120 | |
| Fig | 1 | 1 | 1 | 2 | |
| Specified mechanical load (kN) | 120 | ||||
| Class | U120BLP | U120BSP | U120BSP | U120BSP | |
| Nominal unit spacing (mm) | 160 | 146 | 146 | 146 | |
| Nominal diameter (mm) | 280 | 280 | 255 | 320 | |
| Nominal creepage distance (mm) | 430 | 450 | 432 | 555 | |
| Ball & socket size | 16 | 16 | 16 | 16 | |
| Electro mechanical failing load (kN) | 120 | 120 | 120 | 120 | |
| Mechanical routine test load (kN) | 60 | 60 | 60 | 60 | |
| Power frequency withstand voltage | Dry kV | 80 | 80 | 80 | 80 |
| Wet (kV) | 45 | 45 | 42 | 55 | |
| Lightning impulse withstand voltage (kV) | 120 | 120 | 120 | 135 | |
| Power frequency puncture voltage (kV) | 120 | 120 | 120 | 130 | |
| Radio interference voltage | Test voltage to ground (kV) | 10 | 10 | 10 | 10 |
| Max . RIV at 1MHz (μV) | 50 | 50 | 50 | 50 | |
| Weight (kg) | 7.9 | 7.6 | 7.9 | 11.0 | |
| Applicable standard: GB IEC AS BS IS | |||||
