| Insulator type | AC aerodynamic type | ||||
| GB standard No. | XMP-70 | XMP-80 | XMP-100 | XMP-120 | |
| Specified mechanical load (kN) | 70 | 80 | 100 | 120 | |
| Class | U70BL | U80BL | U100BL | U120BS | |
| Nominal unit spacing (mm) | 146 | 146 | 146 | 146 | |
| Nominal diameter (mm) | 350 | 330 | 360 | 360 | |
| Nominal creepage distance (mm) | 340 | 320 | 340 | 340 | |
| Ball & socket size | 16 | 16 | 160 | 16 | |
| Electro mechanical failing load (kN) | 70 | 80 | 100 | 120 | |
| Mechanical routine test load (kN) | 35 | 40 | 50 | 60 | |
| Power frequency withstand voltage | Dry kV | 70 | 70 | 70 | 70 |
| Wet (kV) | 40 | 40 | 40 | 40 | |
| Lightning impulse withstand voltage (kV) | 105 | 95 | 105 | 105 | |
| 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) | 6.0 | 5.7 | 7.2 | 7.2 | |
| Applicable standard: BG IEC BS IS | |||||
