| Arrester type(10KA) | Rated voltage | MCOV(KV) | Steep current impulse 1/10ms | lighting impulse 8/20ms | Switching current impulse 30/60ms | 2000ms rectangular current withstand(A) | 4/10ms high current impulse | Dimesion(Total length)mm | Dimension(insulator part)mm | No. of sheds | Creepage distance(mm) |
| HDA1-10/6 | 6 | 4.8 | 20.7 | 18 | 15.3 | 250 | 100 | 250 | 125 | 3 | 210 |
| HDA1-10/9 | 9 | 7.2 | 31.0 | 27 | 23.0 | 250 | 100 | 280 | 155 | 4 | 280 |
| HDA1-10/11 | 11 | 8.8 | 37.9 | 33 | 28.1 | 250 | 100 | 310 | 185 | 5 | 350 |
| HDA1-10/12 | 12 | 9.6 | 41.5 | 36 | 30.6 | 250 | 100 | 310 | 185 | 5 | 351 |
| HDA1-10/15 | 15 | 12.0 | 52.0 | 45 | 38.3 | 250 | 100 | 340 | 215 | 6 | 419 |
| HDA1-10/18 | 18 | 14.4 |
62.0 |
54 | 46.0 | 250 | 100 | 370 | 245 | 7 | 487 |
| HDA1-10/21 | 21 | 16.8 | 72.5 | 63 | 53.5 | 250 | 100 | 400 | 275 | 8 | 555 |
| HDA1-10/24 | 24 | 19.2 | 82.5 | 72 | 61.2 | 250 | 100 | 430 | 305 | 9 | 622 |
| HDA1-10/27 | 27 | 21.6 | 93.2 | 81 | 69.0 | 250 | 100 | 460 | 335 | 10 | 690 |
| HDA1-10/30 | 30 | 24.0 | 103.5 | 90 | 76.5 | 250 | 100 | 520 | 395 | 12 | 760 |
| HDA1-10/33 | 33 | 26.4 | 113.8 | 99 | 84.2 | 250 | 100 | 550 | 425 | 13 | 894 |
| HDA1-10/36 | 36 | 28.8 | 124.2 | 108 | 91.8 | 250 | 100 | 550 | 425 | 13 | 894 |
Polymer Housed Metal-Oxide Surge Arrester
the best advantage protection against over-voltage
1.Series 1-Polymer housed metal-oxide surge arrester
2.Series 2-Polymer housed metal-oxide surge arrester
3.Series 3-Porcelain Housed metal-oxide surge arrester
4.Series 3-station class surge arresters
Operating principle
1.Metal-oxide surge arrester provides the most advanced protection against over-voltage in the world,since MOA' resistors are made up of zinc oxide films.
2.MOA has a good voltage-ampere characteristics as compared with silicone carbide arrester,its volt/ampere characteristic is much superior and results in much better performance.
3.A micro ampere level current flows while MOA is operating under normal voltage,but the amount of the current will be thousands amperes when MOA is subjected to over-voltage,because of MOA has a good non-linear characteristics,Hence MOA provide excellent protection for the HV equipment,especially the transformer,cables and switchgear.
Application
Metal-oxide surge arrester which applies to protect the power equipment link transformers against system overvoltage and lighting surges.
Service conditions
1.Ambient temperature:-40degrees to +40degrees
2.Height about sea level:<=1000m
3.Power supply frequency:48-62HZ
4.Earthquake intensity:Not exceed richter 7.0 grade
5.Maximum wind veiocity:<=35m/s
6.The long-term power running voltage should not over the continus operating voltage
7.The altiplano or contaminated area should be indicated