Page 6 - 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 and 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
(TNS)
patented RADAX Flow Technology, offers high follow current limitation and thus 951 305
maximum system availability. (TNC)
B Data interface Part No.

BLITZDUCTOR XTU
The combined arrester protects balanced data interfaces (e.g. RS 485). 920 349
Via the integrated actiVsense Technology the arrester automatically detects (Module)
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.
DEHNguard M YPV 952 565
This type 2 arrester is specially designed for application in PV systems and protects (1170 V)
C the DC side of the inverter against surges from inductive couplings. If there is more
than 10 metres of cable between the PV system and the inverter, a further arrester 952 567
E is necessary in the roof area. (1500 V)
F
alternatively: DEHNcube YPV SCI 1000
Type 2 arrester DEHNcube YPV SCI provides comprehensive protection for a PV system in 900 910
(1 MPPT)
an enclosure. It is mounted directly upstream of the inverter and is available in two versions,
1 MPPT and 2 MPPT. If there is more than 10 metres of cable between the PV system and 900 920
the inverter, a further arrester is necessary in the roof area. (2 MPPT)
D AC side inverter Part No.
DEHNguard M TNS or DEHNguard M TT 952 405
The surge arrester protects against overvoltages from inductive couplings by distant (TNS)
lightning strikes and from switching overvoltages. If there is more than 10 metres of
cable between the service entrance box and the inverter, a further type 2 surge arrester 952 315
is required at the inverter. (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
A B lightning equipotential bonding.

F External lightning protection
HVI Conductor
With the high-voltage-resistant insulated down conductors it is possible
to make optimum use of the roof surface whilst still maintaining the
separation distance from conductive parts.

The PV modules must be located in the protected volume of the isolated
air-termination system – whilst also maintaining the separation distance “s”.

It is always advisable to favour a lightning protection system If the cable is longer than 10 metres, e.g., between the
which, taking the required separation distance into account, grid connection point and the inverter, additional type 2
has no direct connection with the PV power supply system. surge protective devices are required. Battery storage
The HVI Conductor by DEHN comes into its own here. systems which are less than 10 m away from the point

High-voltage-resistant insulated down conductors make it where the surge protective device is installed are also
possible to maintain an equivalent separation distance of, protected.
e.g., s ≤ 0.75 m (in air) and still make optimum use of the Further info on the topic of lightning and surge protection
for modern industrial buildings can be found on our website.
roof surface.
 www.de.hn/pvip
Type 2 arresters are used on the DC side to protect the
module and the inverter. The AC side is protected by a
combined arrester near the grid connection. On both the We are here to support you with any technical queries:
AC and DC sides, the protective devices are installed as Team Support
Telephone: +49 9181 906 1750
closely as possible to the device to be protected. E-Mail: [email protected]

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