34
200
14
（
4
）
22
（
6
）
35
（
10
）
90
（
27
）
Appendix
：
Prevent lightning strike, surge
The product adopt TVS plate lightning strike technology, can prevent damage to instantaneous lightning
strike, surge and so on kinds of pulse signal of lower than 1.5KW power efficiently. But, about install indoor,
should to do necessary defense measures under the premise of assuring electric safe
：
z
There must be at least 50 meters between signal transmission line and high pressure equipment or
high cables;
z
Routing indoor select go along eave to the best;
z
In empty skies, must adopt hermetic tube cover up in earth way to routing, and adopt one point, forbid
routing in air absolutely;
z
In strong thunderstorm or high inductive pressure area( such as high pressure transformer substation),
must adopt extra power equipment and install lightning rod and so on measures;
z
outdoor equipment and design on routing of defend thunder and earth should be considered uniformly,
connecting requirement on building defend thunder ;
z
system should earth equal to electric bit
，
earth equipment must satisfy the double requirements of
system anti-jamming and electric safe, and don’t short connect or mix connect with strong electric net
zero line. When system earth separately, earth resistance is no more than 4
Ω
,section squares of earth
lines must no more than 25mm
2
