New Products

DEHNguard ® S ... VA (FM)
Pluggable single-pole varistor-based arrester
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.
Type 2 Surge Arresters
• Multi-purpose surge arrester consisting of a
base part and plug-in protection module
• Leakage-current-free series connection of a
varistor and a spark gap in the pluggable protection
module
• High reliability due to "Thermo Dynamic
Control" SPD monitoring device
• Energy coordination with other arresters of the
Red/Line product family
• Easy replacement of protection modules without
tools due to module locking system with
module release button
• Narrow (modular) design according to
DIN 43880
• Multifunctional terminal for connecting conductors
and busbars
Surge Arresters Type 2
DEHNguard S ... VA: Modular single-pole surge arrester with a varistor and a spark gap connected in series in the pluggable protection
module
DEHNguard S ... VA FM: Modular single-pole surge arrester with a varistor and a spark gap connected in series in the pluggable protection
module; with remote signalling contact for monitoring device (floating changeover contact)
The single-pole DEHNguard S ... VA surge arresters are an ideal supplement
to the proven DEHNguard product families. The special series connection
of a spark gap and a varistor module in the protection module
opens up new fields of application. It is advisable to use DEHNguard S ...
VA devices to protect, for example, systems with permanent insulation
monitoring and the traction power supply of signal lines which have to
be free of leakage currents. DEHNguard S ... VA surge arresters are also
suited for protecting power line communication systems.
Multifunctional terminals allow almost unlimited flexibility in terms of
connection to one another, but also to other DIN rail mounted devices in
a distribution board. However, it is not only flexibility that characterises
the DEHNguard S ... VA family. Its distinctive performance parameters set
standards worldwide:
A high discharge capacity, complete absence of leakage currents, a low
voltage protection level and the dual "Thermo Dynamic Control" monitoring
and disconnection device describe the high degree of reliability.
It is the DEHN-specific "Thermo Dynamic Control" disconnector that
ensures that the arresters change into a safe, isolated state, even in case
of extreme overloads. For this purpose, the intensity of the discharge current
and the surface temperature of the heavy-duty varistor are evaluated.
In addition to the standard visual indication with red and green indicator
flags, the DEHNguard S VA ... FM devices feature a three-pole
remote signalling terminal. With its floating changeover contact, the
remote signal can be used as break or make contact according to the particular
protection concept.
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