Type classification: 11kV lightning arresters are mainly distribution type and power station type zinc oxide lightning arresters. Zinc oxide surge arresters have become mainstream due to their nonlinear volt ampere characteristics and high response speed.
Execution standard: Must comply with the national standard GB/T 18802.1, export models compatible with IEC 60099-4 standard, emphasizing the matching of rated voltage, residual voltage and other parameters with the 11kV system
Core component: mainly composed of zinc oxide valve plates, achieving fast response through nonlinear characteristics.
Shell material: silicone rubber, weather resistance can cover -40 ℃~85 ℃, some models use epoxy resin sealing to enhance moisture resistance (IP65)
| 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 | |
Lightning overvoltage protection for 11kV distribution lines and substation equipment to reduce lightning trip rates;
Power frequency continuous current cutoff is used to protect the insulation of equipment such as transformers and switchgear.
Grade III polluted areas require regular cleaning of surface pollution;
It is recommended to use lightning protection clamps or controllable discharge lightning rods in areas with multiple thunderstorms (such as active lightning triggering structures)
