Page 5 - DEHN-protects-photovoltaic-systems

Buildings with PV installations A Main distribution board Part No.

941 306
DEHNshield Basic (depending on the system configuration) (TNC)
Without external lighting protection The combined arrester is mounted directly at the entrance point into the building. 941 406
It protects the electrical installations in the immediate vicinity. (TNS)
941 316
(TT)
alternatively: DEHNguard modular (depending on the system configuration) 952 400
This surge arrester protects against overvoltages from inductive couplings by distant lightning (TNS)
strikes and from switching overvoltages. It must be installed downstream of the electricity meter 952 381
which means that it does not protect the Smart Meter and Smart Meter Gateway. (TT)
C2 B Internet / telephone / broadband Part No.

DEHNbox TC180
E The combined arrester offers protection in the event of lightning strikes and overvoltages.
It secures telephone and DSL connections. Its compact design makes it quick to install in 922 210
new buildings and easy to retrofit in existing buildings.
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)
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
is necessary in the roof area. (1500 V)

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)
A D AC side inverter Part No.
B
C1 DEHNguard M TNS or DEHNguard M TT
D The surge arrester protects against overvoltages from inductive couplings by distant 952 405
(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
The clamps are suitable for integrating the mounting systems of PV installations 540 250
in the functional equipotential bonding / the functional earthing or the
lightning equipotential bonding. 365 250
Surge protective devices should be installed even
if there is no external lightning protection system.

The standards IEC 60364-7-712 and IEC 61643-32 describe The same applies to battery storage systems; If the storage
type 2 arresters as protective devices. DEHN recommends system is in the immediate proximity (less than 10 m) of
type 1 arresters because these protective devices can be the surge protective device, no further protective devices
installed upstream of the meter and offer additional are required.
protection against partial lightning currents. This provides
optimum protection for devices such as smart meters.
It is necessary to protect both the electrical components on
the AC and DC side and any data interfaces. The protective
devices should be installed as closely as possible to the
device to be protected, e.g., inverter. If the line between the
surge protective device and, e.g., the inverter is longer than
10 metres, an additional type 2 surge protective device is
required.
Further info on the topic of lightning and surge protection
for modern residential buildings can be found on our website.

 www.de.hn/pvrb

We are here to support you with any technical queries:
Team Support
Telephone: +49 9181 906 1750
E-Mail: [email protected]

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