New Products

DEHNguard ® modular
Modular multipole surge arrester
Type 2 Surge Arresters
• Prewired complete unit consisting of a base
part and plug-in protection modules
• Energy coordination with other arresters of the
Red/Line product family
• High discharge capacity due to heavy-duty zinc
oxide varistors/spark gaps
• High reliability due to "Thermo Dynamic
Control" SPD monitoring device
• Easy replacement of protection modules without
tools due to module locking system with
module release button
• Vibration and shock-tested according to
EN 60068-2
For protecting low-voltage consumer’s installations against surges. For
installation in conformity with the lightning protection zones concept at
the boundaries from 0 B – 1 and higher.
Surge Arresters Type 2
DEHNguard M TNC ...: Modular surge arrester for use in TN-C systems
DEHNguard M TNS ...: Modular surge arrester for use in TN-S systems
DEHNguard M TT ...: Modular surge arrester for use in TT and TN-S systems ("3+1" circuit)
DEHNguard M TN ...: Modular surge arrester for use in single-phase TN systems
DEHNguard M TT 2P ...: Modular surge arrester for use in single-phase TT and TN systems ("1+1" circuit)
DEHNguard M WE ...: Modular surge arrester especially for use in wind turbines
DEHNguard M ... FM: With remote signalling contact for monitoring device (floating changeover contact)
The modular DEHNguard M ... surge arresters with their functional
Red/Line family design set new standards in terms of safety and userfriendliness.
The proven protective circuit with heavy-duty zinc oxide varistors
in combination with the dual "Thermo Dynamic Control" monitoring
device are characteristic of the DEHNguard technology.
A variety of features shows that both reliable surge protection and equipment
safety are key elements of the new modular DEHNguard surge
arresters. The application-based product designation, which makes it considerably
easier to choose the correct device for the relevant application,
as well as the unique module locking system stand for fulfilling the most
stringent safety requirements. The module locking system firmly fixes the
protection modules to the base part. Neither vibration during transport
nor the enormous electromagnetic forces of discharge can loosen the protection
modules. Nevertheless, they can be easily replaced without tools
by simply pressing the user-friendly module release button of the protection
modules. Each protective circuit of the multipole surge arresters and
each protection module are mechanically coded to ensure against
installing an incorrect module.
might be damaged. As with all DEHN surge arresters with "Thermo
Dynamic Control", the intensity of the discharge current and the surface
temperature of the heavy-duty varistor are evaluated. The visual indicator
with green and red indicator flags shows the availability of every protective
circuit. Apart from this standard visual indication, DEHNguard M ...
FM devices feature a three-pole remote signalling terminal.
With its floating changeover contact, the remote signal can be used as a
make or break contract according to the particular circuit concept. The
surge arresters of the multipole modular DEHNguard M family feature
multifunctional terminals on a standardised spacing of 1 module for the
connection of conductors and busbars, allowing easy wiring with other
DIN rail mounted devices. Thus, a wide range of applications can be easily
connected in series according to IEC 60364-5-53 for optimal protection.
The dual "Thermo Dynamic Control" monitoring device was not only
developed on the basis of national and international product standards,
but also stands for experience of decades in the world market of surge
protective devices and considers practical applications where arresters
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