Page 7 - DEHN-protects-photovoltaic-systems

Buildings with PV installations A Main distribution board Part No.

DEHNventil (depending on the system configuration) 951 315
With external lighting protection, without sufficient separation distance The combined arrester is mounted directly at the entrance point to the building. (TT)
It protects the electrical installation in the direct environment and, thanks to the 951 405
patented RADAX Flow Technology, offers high follow current limitation and thus (TNS)
maximum system availability. 951 305
(TNC)
B Data interface Part No.

BLITZDUCTOR XTU
The combined arrester protects balanced data interfaces (e.g. RS 485). 920 349
(Module)
Via the integrated actiVsense Technology the arrester automatically detects 920 300
the operating voltage of the useful signal and optimally adapts the voltage (Base Part)
protection level to it.
D B C
C PV installation Part No.
DEHNcombo YPV 900 075
This combined arrester was specially developed for use in PV installations and protects (1200 V)
C the DC side of the inverter against partial lightning currents and surges.
If the cable length between the PV system and the inverter is longer than 10 metres, 900 076
E an additional arrester is required in the roof area. (1500 V)
F
D AC side inverter Part No.

DEHNshield TNS Basic FM or DEHNshield TT Basic FM 941 406
If the cable length between the grid connection and the inverter is longer than 10 metres, (TNS)
an additional combined arrester is required at the inverter. This application-optimised combined
lightning current and surge arrester fulfils the requirements LPS class III at the point of installation 941 316
and thus protects the inverter against any partial lightning currents and surges. (TT)

E Equipotential bonding Part No.
UNI earthing clamps/saddle clamps 540 250
The clamps are suitable for integrating the mounting systems of PV installations
in the functional equipotential bonding / the functional earthing or the 365 250
lightning equipotential bonding.
F External lightning protection
Air-termination and down conductor system
Air termination rods and down conductors are required to protect the building
and the PV installation and any additional components against the effects of
A B direct lightning strikes.

If the separation distance “s” cannot be maintained,
lightning equipotential bonding is required.

If the separation distance calculated acc. to IEC 62305-2 If the lines between the arrester and the device to be
cannot be maintained, e.g, on metal roofs, lightning protected are longer than 10 metres, e.g., on the DC side
1)
equipotential bonding must be established . The metal between the inverter and PV modules, additional protective
components must be connected to the lightning protection devices should be installed. Supplement 5 of DIN EN
systems and the connections should be capable of carrying 62305-3 describes such additional type 1 arresters .
2)
lightning current.
At the same time, the lines leading into the building must be Further info on the topic of lightning and surge protection
for modern industrial buildings can be found on our website.
integrated in the lightning equipotential bonding. This is done
using type 1 combined arresters on the AC, DC and data side.  www.de.hn/pvip
1) IEC 62305-3: Protection against lightning - Part 3: Physical damage to
structures and life hazard We are here to support you with any technical queries:
2) DIN EN 62305-3 (VDE 0185-305-3) Supplement 5: Protection against light- Team Support
ning - Part 3: Physical damage to structures and life hazard – Supplement 5: Telephone: +49 9181 906 1750
Lightning and overvoltage protection for photovoltaic power supply systems E-Mail: [email protected]

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