9.18 Lightning and surge protection for PV systems and solar ... - Dehn
9.18 Lightning and surge protection for PV systems and solar ... - Dehn
9.18 Lightning and surge protection for PV systems and solar ... - Dehn
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DNO<br />
a.c.<br />
output<br />
2<br />
~<br />
3<br />
=<br />
meter/main<br />
distribution<br />
SEB<br />
d.c.<br />
input<br />
kWh kWh<br />
1<br />
earthing<br />
conductor<br />
Fig. <strong>9.18</strong>.1.6 Surge <strong>protection</strong> concept <strong>for</strong> a <strong>PV</strong> system on a building without external lightning<br />
<strong>protection</strong><br />
Figure<br />
<strong>9.18</strong>.1.6<br />
L.v. supply<br />
1<br />
2<br />
Protection<br />
<strong>for</strong>...<br />
tion system to ensure its <strong>protection</strong><br />
against a direct lightning<br />
strike. By using suitable air-termination<br />
<strong>systems</strong>, like air-termination<br />
rods, <strong>for</strong> example, direct lightning<br />
strikes into the <strong>PV</strong> modules<br />
can be prevented. The necessary<br />
air-termination rods possibly to be<br />
installed additionally, must be<br />
arranged to prevent a direct strike<br />
into the <strong>PV</strong> module within their<br />
<strong>protection</strong> zone <strong>and</strong>, secondly, any<br />
casting of a shadow on the modules.<br />
It has to be considered that a separation<br />
distance s must be kept<br />
between the <strong>PV</strong> components <strong>and</strong><br />
metal parts like lightning <strong>protection</strong><br />
<strong>systems</strong>, rain gutters, skylights,<br />
<strong>solar</strong> cells or antenna <strong>systems</strong><br />
in compliance with IEC<br />
62305-3 (EN 62305-3). The separation<br />
distance has to be calculated<br />
according to IEC 62305-3 (EN<br />
62305-3)3. The <strong>PV</strong> system shown in<br />
Figure <strong>9.18</strong>.1.7 is located in the<br />
protective area of the external<br />
lightning <strong>protection</strong> system. Figure<br />
<strong>9.18</strong>.1.7 illustrates the concept of<br />
SPDs Part No.<br />
TN-C system DEHNguard M, DG M TNC 275<br />
DEHNguard M, DG M TNC 275 FM<br />
TN-S system DEHNguard M, DG M TNS 275<br />
DEHNguard M, DG M TNS 275 FM<br />
TT system DEHNguard M, DG M TT 275<br />
DEHNguard M, DG M TT 275 FM<br />
Ac output of the inverter/ac, inverter installed in the attic<br />
TN system DEHNguard M, DG M TN 275<br />
DEHNguard M, DG M TN 275 FM<br />
TT system DEHNguard M, DG M TT 2P 275<br />
DEHNguard M, DG M TT 2P 275 FM<br />
Dc input of the inverter<br />
2 x<br />
3 (each between plus<br />
<strong>and</strong> minus to earth)<br />
DEHNguard, DG <strong>PV</strong> 500 SCP<br />
DEHNguard, DG <strong>PV</strong> 500 SCP FM<br />
Table <strong>9.18</strong>.1.1 Selection of the <strong>surge</strong> protective devices <strong>for</strong> <strong>PV</strong> <strong>systems</strong> on buildings without external lightning <strong>protection</strong> system<br />
952 300<br />
952 305<br />
952 400<br />
952 405<br />
952 310<br />
952 315<br />
952 200<br />
952 205<br />
952 110<br />
952 115<br />
950 500<br />
950 505<br />
www.dehn.de LIGHTNING PROTECTION GUIDE 301
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