Page 62 - Surge-Protection-E_0.pdf

Surge Arresters – Type 2
CIRCUIT INTERRUPTION
FUSE INTEGRATED
DEHNguard SE CI with Integrated Backup Fuse
• Arrester backup fuse integrated in the protection module
• For use in case of higher rated voltages
• Energy coordination with other arresters of the Red/Line
product family
• High discharge capacity
• High reliability due to "Thermo Dynamic Control" SPD
device monitoring
• Easy replacement of protection modules without tools due
to module locking system with module release button

For protecting low-voltage consumer installations against surges. For installation
in conformity with the lightning protection zone concept at the boundaries from
0B – 1 and higher.

DEHNguard SE CI 440 FM: Modular single-pole surge arrester with integrated backup fuse (floating changeover contact)
DEHNguard SE CI WE 440 FM: Modular single-pole surge arrester with integrated backup fuse particularly for use in wind turbines
(floating changeover contact)

The modular surge arrester of the DEHNguard SE CI product family for path is shown by means of a mechanical indicator with green and red
systems with higher rated voltages of 400 / 690 V is available as type indicator flags which does not cause operating currents. It also indicates
DG SE CI 440 FM and DG SE CI WE 440 FM. Type WE is equipped with a the activation of the “Thermo Dynamic-Control“ monitoring device and
varistor of 750 V rated voltage and therefore perfectly suited for convert- of the integrated arrester backup fuse.
er operation with voltage peaks, for example in wind turbines. In addition to this mechanical operating state / fault indication the ver-
With the already integrated arrester backup fuse, the user no longer has sions of the DEHNguard SE CI (WE) 440 FM devices feature a three-pole
to worry about arrester-specific dimensioning requirements such as back- remote signalling terminal. As the remote signalling contact is designed
up protection in the event of a short-circuit or impulse current carrying as a floating changeover contact, the remote signal can, depending on the
capability. circuit concept, be used as a make or break contact.
Highest system availability is even ensured in case of higher voltages due All benefits of the modular design of the DEHNguard family have been
to the ideal matching of SPD and integrated backup fuse. The integrated integrated into the new DEHNguard SE CI family.
fuse has been specially developed for this application. It is not designed The unique module locking system prevents the protection modules from
for continuous current, but specifically for impulse current and short-cir- working loose due to vibrations during transport or the enormous forces
cuit protection which ensures optimal performance. The fuse can only be of discharge.
tripped at the end of the SPD’s service life so that separate replacement
is never necessary. The pluggable protection modules are mechanically coded which is an
additional safety feature of these DEHN devices and guard against install-
Due to the “Thermo Dynamic Control“ monitoring device, the surface ing an incorrect protection module.
temperature of the heavy-duty varistor and the intensity of the discharge
current are used for evaluation. The operating state of each protective

Surge Arresters – Type 2

58 You will find detailed product information on our website Valid as of August 1, 2020