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DEHNsecure protects
direct current applications

The use of direct current (d.c.) systems has considerably
increased over the last years. Apart from conventional
d.c. applications such as in the telecommunication and
railway sectors, new fields of application, for example in
the security sector, opened up. The latest electromobility
projects also extend the scope of application of d.c.
systems. In this context, requirements on surge protective
devices for use in d.c. systems have also increased. The
installation and product standards for surge protective
devices in low-voltage applications, however, only
include requirements on surge protective devices used in
alternating current (a.c.) systems.

When selecting and dimensioning surge protective
devices for direct current (d.c.) systems, not only
lightning protection requirements, but also d.c.-specific
system requirements must be met. As opposed to a.c.
applications, there is no natural current zero in d.c.
systems.

The coordinated DEHNsecure lightning current arrester is
ideally suited for all d.c. applications. This type 1 arrester in
voltage versions 60 V, 220 V and 242 V can be used in:

• Emergency power supply systems
• Safety lighting systems
• Direct current drives
• Power supply units for remote radio heads
• Aircraft warning lights

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