| Insulator type | AC Anti-pollution type (tri-shed) | ||||||
| GB standard No. | XSP-70 | XSP-100 | XSP-160 | XSP-210 | XSP-240 | XSP-300 | |
| Specified mechanical load (kN) | 70 | 100 | 160 | 210 | 240 | 300 | |
| Class | U70BLP | U100BELP | U160BLP | U210BSP | U240BP | U300BP | |
| Nominal unit spacing (mm) | 146 | 155 | 170 | 170 | 170 | 195 | |
| Nominal diameter (mm) | 280 | 300 | 330 | 340 | 360 | 360 | |
| Nominal creepage distance (mm) | 450 | 545 | 545 | 545 | 545 | 550 | |
| Ball & socket size | 16 | 16 | 20 | 20 | 24 | 24 | |
| Electro mechanical failing load (kN) | 70 | 100 | 160 | 210 | 240 | 300 | |
| Mechanical routine test load (kN) | 35 | 50 | 80 | 105 | 120 | 150 | |
| Power frequency withstand voltage | Dry kV | 80 | 80 | 90 | 90 | 90 | 90 |
| Wet (kV) | 42 | 45 | 50 | 50 | 50 | 50 | |
| Lightning impulse withstand voltage (kV) | 120 | 125 | 130 | 130 | 130 | 130 | |
| Power frequency puncture voltage (kV) | 120 | 120 | 130 | 130 | 130 | 130 | |
| Radio interference voltage | Test voltage to ground (kV) | 10 | 10 | 10 | 10 | 10 | 10 |
| Max. RIV at 1MHz μV | 50 | 50 | 50 | 50 | 50 | 50 | |
| Weight (kg) | 7.1 | 9.2 | 11.8 | 14.0 | 15.0 | 17.1 | |
| Applicable standard: BG IEC BS IS | |||||||
