Page 41 - Surge-Protection-E_0.pdf

Coordinated Lightning Current Arresters – Type 1
WBF CIRCUIT INTERRUPTION
DEHN-FUNKENSTRECKEN-TECHNOLOGIE INSIDE
WELLENBRECHER-FUNKTION FUSE INTEGRATED
DEHNbloc Maxi 1 CI 440 / 760 FM
• Spark-gap-based lightning current arrester with integrated
lightning current carrying backup fuse in a compact enclosure
• Extremely high lightning current discharge capacity of
35 kA (10/350 µs)
• Low voltage protection level (including backup fuse)
• High follow current extinguishing capability and limitation
thanks to RADAX Flow technology
• Energy coordination with other arresters of the Red/Line
product family
• Operating state / fault indication by green / red indicator
flag in the inspection window

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

DEHNbloc Maxi 1 CI 440 FM: Coordinated single-pole lightning current arrester with integrated backup fuse, high follow current extinguishing
capability and remote signalling contact for monitoring device (floating changeover contact) for UC = 440 V
DEHNbloc Maxi 1 CI 760 FM: Coordinated single-pole lightning current arrester with integrated backup fuse, high follow current extinguishing
capability and remote signalling contact for monitoring device (floating changeover contact) for UC = 760 V Lightning Current Arresters – Type 1

The coordinated DEHNbloc Maxi CI The integrated backup fuse is dimensioned to ensure maximum discharge
440 and 760 lightning current ar- capacity and optimal system protection. Consequently, the need to select
resters are specifically designed for and install an adequate arrester backup fuse is eliminated, ensuring short
higher system voltages, thus effi- connecting cable lengths as required in the IEC 60364-5-53 standard.
ciently protecting installations from The proven spark gaps with wave breaker function and RADAX Flow tech-
the effects of direct lightning strikes nology are the core of the coordinated DEHNbloc Maxi CI 440 and 760
and surges. The features of the prov- lightning current arresters. In case of spark-gap-based type 1 arresters, the
en DEHNbloc Maxi device series and full current flows through the type 1 arrester during the discharge process;
a lightning current carrying arrester similar to a wave breaker, the destructive energy is mitigated to a suffi-
backup fuse are combined in the ciently low level, thus considerably relieving the downstream SPDs and
compact enclosure with a width of the entire electrical installation. In addition to this wave breaker function,
three standard modules and there- the RADAX Flow technology reduces and extinguishes mains follow cur-
fore the devices require up to 60 % Flexible installation using mounting rents to such a low level that even a 32 A gG fuse does not trip. This en-
less space than a conventional solu- brackets sures high availability and longevity of the electrical installation.
tion. The new enclosure concept allows flexible installation. Due to the typical
Due to the increasingly compact design of system applications, the instal- installation environment, DEHNbloc Maxi CI is delivered with two mount-
lation of lightning current arresters in accordance with standards is be- ing brackets so that the arresters can also be directly fixed on a mounting
coming more and more difficult for the user. The DEHNbloc Maxi CI not plate. However, the arresters can, of course, also be mounted on a DIN rail.
only fulfils requirements in terms of the space-saving integration of a type
1 arrester, but also the protection requirements of modern switchgear The operating state / fault indication of DEHNbloc Maxi CI, which also
installations. includes the fuse monitoring, does not cause operating currents and in-
stantly shows the status of the devices. Apart from the standard visual
Typical fields of application of this arrester are industrial plants with com- indicator with green and red flags, the devices feature a three-pole remote
mon nominal voltages of 400 / 690 V, IT systems of the chemical industry signalling terminal. As the remote signalling contact is designed as a float-
with nominal voltages of 500 V a.c., protection of the transformer on the ing changeover contact, the remote signal can, depending on the circuit
low-voltage side of wind turbines and protection of the a.c. side of central concept, be used as a make or break contact.
inverters of photovoltaic systems.

Valid as of August 1, 2020 You will find detailed product information on our website 37