The Chinese National Standard GB
50343-2004 recommends 80kA I-peak. Why then does MCG recommend 200kA?
The answer to this question also resolves the issue of why 7 to 10% of SPD
installations in China fail to protect the equipment they are meant to
protect. The reason is that lightning currents are larger than
80kA. if you want to protect your equipment you need to install SPDs
with higher current-handling capabilities.
Many studies across the world agree that the size of lightning currents
make 80kA surge protectors inadequate to fully protect electronic equipment
from lightning's damaging effects. Five of these studies
标准:
o
FAA
Std. 019d1
o
Mil
Std 419A
o
BS
6651
o
IEEE
1100 Emerald Book
o
NOAA
- National Oceanic & Atmospheric Administration
国家雷电监控网（National
Lightning Detection Network-NLDN）
很多研究包括
NLDN
对6000万（60,000,000）雷闪的研究,
对雷电I-peak值域研究的结果大致相通.
Almost all major installations in North America specify surge protectors
with a minimum current handling ability of 200kA. The reason is best
shown in this data taken from BS 6651.