| Insulator type | AC normal type | ||||
| GB standard No. | XP-100 | XP-120 | XP-125 | XP-125 | |
| Fig | 1 | 1 | 1 | 2 | |
| Specified mechanical load (kN) | 100 | 120 | 125 | 125 | |
| Class | U100BL | U120BS | U125BS | U125BL | |
| Nominal unit spacing (mm) | 146 | 146 | 146 | 178 | |
| Nominal diameter (mm) | 255/280 | 255 | 255 | 280/292 | |
| Nominal creepage distance (mm) | 295/340 | 295/320 | 295 | 324/356 | |
| Ball & socket size | 16 | 16 | 20 | 20 | |
| Electro mechanical failing load (kN) | 100 | 120 | 125 | 125 | |
| Mechanical routine test load (kN) | 50 | 60 | 62.5 | 62.5 | |
| Power frequency withstand voltage | Dry kV | 70 | 70 | 70 | 70 |
| Wet (kV) | 40 | 40 | 40 | 40 | |
| Lightning impulse withstand voltage (kV) | 100 | 100 | 100 | 100 | |
| Power frequency puncture voltage (kV) | 110 | 110 | 110 | 110 | |
| Radio interference voltage | Test voltage to ground (kV) | 10 | 10 | 10 | 10 |
| Max . RIV at 1MHz (μV) | 50 | 50 | 50 | 50 | |
| Weight (kg) | 5.7/6.1 | 5.7 | 5.8 | 8.0 | |
| Applicable standard: GB IEC AS BS IS | |||||
