| Insulator type | Ground wire insulator for earthline | ||||
| GB standard No. | XDP-70CN | XDP-70C | XDP-100CN | XDP-100C | |
| Fig | 1 | 2 | 1 | 2 | |
| Specified mechanical load | 70 | 100 | |||
| Nominal unit spacing (mm) | 200 | 200 | 210 | 210 | |
| Nominal diameter (mm) | 160/170 | 160/170 | 170 | 170 | |
| Nominal creepage distance (mm) | 160/170 | 160/170 | 170 | 170 | |
| Wet power frequency withstand voltage (kV) | 30 | 30 | 30 | 30 | |
| Reted E&M failing load (kV) | 110 | 110 | 110 | 110 | |
| Power-freq.(dry or wet) flashover voltage | Upper limited value (kV) | 30 | 30 | 30 | 30 |
| Lower limited value (kV) | 8 | 8 | 8 | 8 | |
| Power arc extinguish current at 15mm gap 2500V (min.) | Inductio Current (A) | 35 | 35 | 35 | 35 |
| Capacity current (A) | 20 | 20 | 20 | 20 | |
| Pole are resistibility (min.) | Power-freq.current (kA) | 10 | 10 | 10 | 10 |
| Arcing duration (kA) | 0.2 | 0.2 | 0.2 | 0.2 | |
| Arcing time | 2 | 2 | 2 | 2 | |
| Weigh (kg) | 4.2/4.6 | 4.2/4.6 | 5.8 | 5.8 | |
| Applicable standard: JB/T 9680 | |||||
