ANNEX D - GROUNDING, BONDING AND LIGHTNING PROTECTION
17
3
LPS: LIGHTNING PROTECTION
Lightning protection guidelines.
CONSULT YOUR LIGHTNING PROTECTION SPECIALIST TO ANALYSE YOUR PROJECT.
Preferred application: Isolating lightning protection system (with Air-termination rods)
•
Determine the safe separation distance
(
S
)
according to NEN-EN-IEC 62305 (at least 0.5 metres).
•
Try to respect the separation distance between PV system (PV) and lightning protection system (LPS).
•
This way you’re able to keep PV system seperated from Lightning protection system to prevent unwanted lightning current in building.
If this is not possible, connect the PV system to LPS according to the applicable lightning protection level (LPL);
•
See table 1, use at least 16mm2 connections.
•
Check necessity additional overvoltage protection type 1 and/or type 2.
•
Make sure that the cable support systems are also grounded and connected to LPS. NB: Metal cable support systems also belong to the PV
system.
•
Make sure that the grounding cable is routed parallel to the DC cables.
IN BOTH CASES: CONSULT YOUR LIGHTNING PROTECTION SPECIALIST IN ADVANCE TO ANALYSE YOUR PROJECT AND TO PREVENT ANY UN-
WANTED SAFETY ISSUES. ESDEC IS IN NO CASE RESPONSIBLE FOR THE APPLICATION AND/OR COMBINATION WITH THE LIGHTNING PROTECTION
SYSTEM AT THE ROOF. USE THE EXPERTISE OF YOUR SPECIALIST AND MAKE SURE A SAFE INSTALLATION CAN BE GUARENTEED ACCORDING -
NEN-EN-IEC 62305 - NEN1010 (NPR5310 – deel 712 par. 6.3)
S
Mesh size
LPL level
PV System connect every..
5x5 metres
I
5 metres
10x10 metres
II
10 metres
15x15 metres
III
15 metres
20x20 metres
IV
20 metres
table 1
LPS = lightning installation
LPL = lightning protection level
