Material and Structure
Core components: using zinc oxide valve plates, with nonlinear volt ampere characteristics and a response time of ≤ 25ns.
Shell material: silicone rubber or ceramic material, strong weather resistance (-40 ℃~85 ℃), suitable for outdoor high humidity and salt spray environments.
Sealing design: Some models are sealed with epoxy resin, with a protection level of IP65, to prevent moisture from entering
Core scenario:
Lightning overvoltage protection for 6kV distribution lines to reduce insulation wire breakage accidents caused by lightning strikes (in mining areas, coastal areas, and other areas with frequent lightning strikes);
Power frequency continuous current cutoff of substation switchgear, transformers and other equipment.
| Surge arrester rated voltage | Surge arrester system voltage | Nominal discharge current 20kA level | Nominal discharge current 10kA level | System nominal voltage | ||||||
Stee wave impulse current residual voltage | Lightning impulse current residual voltage | Operation impulse current residual voltage | 1 m A DC reference voltage | Stee wave impulse current residual voltage | Lightning impulse current residual voltage | Operation impulse current residual voltage | 1 m A DC reference voltage | |||
| Virtual value | (peak)≤ | ≥ | (peak)≥ | ≥ | Virtual value | |||||
| 17 | 13.6 | 57.5 | 50 | 42.5 | 25 | 10 | ||||
| 24 | 19.2 | 82.8 | 72 | 61.2 | 42 | 20 | ||||
| 36 | 28.8 | 124.2 | 108 | 91.8 | 47 | |||||
| 42 | 33.6 | 138 | 120 | 98 | 65 | 27.5 | ||||
| 51 | 40.8 | 154 | 134 | 114 | 73 | 35 | ||||
| 54 | 43.2 | 163 | 142 | 121 | 77 | |||||
| 96 | 75 | 288 | 250 | 213 | 140 | 66 | ||||
| 108 | 84 | 315 | 281 | 239 | 157 | 110 | ||||
| 114 | 89 | 341 | 297 | 252 | 165 | |||||
| 216 | 168 | 630 | 562 | 478 | 314 | 220 | ||||
| 312 | 237 | 847 | 760 | 643 | 442 | 330 | ||||
| 324 | 246 | 880 | 789 | 668 | 459 | |||||
| 444 | 324 | 1238 | 1106 | 907 | 597 | 1137 | 1015 | 900 | 597 | 500 |
| 468 | 330 | 1306 | 1106 | 956 | 630 | 1198 | 1070 | 950 | 630 | |
Level III polluted areas and areas with ice coverage ≤ 10mm require regular cleaning of surface pollution
The selection should be based on the system's short-circuit capacity, environmental pollution level, and protection level. For high corrosion areas, it is recommended to use fully sealed silicone rubber models
