Growatt MAX 80-150KTL3-X LV Series Installation & Operation Manual page 30

编号：GR-UM-C -00
Fig 6.10
1）It is generally recommended to install lightning protection devices (such as
lightning rods / lightning protection belts and down conductors) to prevent lightning
from hitting the PV array.
2） Lightning protection devices and down-conductors and related equipment in
photovoltaic systems (including photovoltaic panels, inverters, cables, power
distribution equipment) should maintain a safe separation distance S.
A. When the safety distance S is satisfied The position ①③ of the figure should be
equipped with a lightning protection module. In general, it is recommended to install
Type II in position ① and Type I in position ③.
B. When the safety and safety distance S is not met:
In addition to position 3, Type I lightning protection module should be installed in
Figure①②④.
3） The lightning down conductor and the equipment ground wire eventually sink at
a total ground point, but the two cannot share the wire. That is, the equipment
grounding wire should be pulled separately, and the wire diameter
requirement >6mm² when the safety interval distance S is satisfied.
4） About the above lightning protection lightning receptor system related design
reference GB/T 21714.3-2015 Suggested value of S: According to the general 5 storey
height (about 15m) building roof, S takes 2.5m enough, this distance can be
simplified according to the inverse relationship of the floor height.
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