| Insulator type | D.C. Anti-pollution type (Tri-shed) | |||
| GB standard No. | XZSP-160 | XZSP-210 | XZSP-300 | |
| Specified mechanical load (kN) | 160 | 210 | 300 | |
| Class | U160BL | U210BS | U300B | |
| Nominal unit spacing (mm) | 170 | 170 | 195 | |
| Nominal diameter (mm) | 340 | 350 | 400 | |
| Nominal creepage distance (mm) | 560 | 560 | 635 | |
| Ball & socket size | 20 | 20 | 24 | |
| Electro mechanical failing load (kN) | 160 | 210 | 300 | |
| Mechanical routine test load (kN) | 80 | 105 | 150 | |
| D.C. withstand voltage（±） | Dry kV | 140 | 140 | 145 |
| Wet (kV) | 55 | 55 | 60 | |
| Dry lightning impulse withstand voltage (kV) | 140 | 140 | 145 | |
| Power frequency puncture voltage（±） | Dry kV | 155 | 155 | 160 |
| Wet (kV) | 60 | 60 | 65 | |
| puncture voltage inSF6(+) kV | 210 | 210 | 220 | |
| Weigh (kg) | 11.6 | 12.4 | 19.5 | |
| Applicable standard: GB IEC IS | ||||
