Page 9 - dehn-surge-protection-PV

1 d.c. side (pv modules / inverter)

Building without external lightning protection
If a PV system is retrofitted and no external lightning
protection system is installed, the solution according to
the supplement 5 of the german version of the IEC/EN
62305-3 can be used. It recommends to install a type
2 surge protective device on the d.c. and a.c. side to
protect the PV system.

5

GJB
GJB
PC PC = ~ 6 mm² Cu
6 mm² Cu
4
DEHNguard M YPV SCI
®
M M
type 2 arrester
SEB
MEB
Multipole, modular surge arrester for PV
systems: The patented SCI technology
prevents fire damage caused by d.c.
Building with external lightning protection and switching arcs
sufficient separation distance
The PV modules must be located in the protection Type Part No. U
zone of the isolated air-termination system and the C
separation distance must be maintained. DG M YPV SCI 600 FM* 952 516 600 V
DG M YPV SCI 1000 FM* 952 515 1000 V
6 DG M YPV SCI 1200 FM* 952 517 1200 V
separation distance s
OK
_ > s
5

GJB
GJB
PC PC = ~ 6 mm² Cu
6 mm² Cu
4
M M
SEB
MEB

Building with external lightning protection
and insufficient separation distance
If the separation distance cannot be maintained,
for example in case of a metal roof, lightning DEHNlimit PV 1000 V2 FM type 1 combined
equipotential bonding must be implemented. lightning current and surge arrester
Multipole spark-gap-based
6
combined lightning current
and surge arrester capable of
separation distance s
not OK carrying lightning currents for
< s PV generator circuits with wave
5
breaker function
Type Part No.
GJB
GJB
16 mm²
PC PC = 16 mm² 900 345
Cu
Cu DLM PV 1000 V2 FM*
~
4
M M
SEB
MEB

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