Page 43 - Surge-Protection-E_0.pdf

Coordinated Lightning Current Arresters – Type 1
WBF
DEHN-FUNKENSTRECKEN-TECHNOLOGIE INSIDE
WELLENBRECHER-FUNKTION
DEHNbloc Maxi 440 / 760
• Spark-gap-based lightning current arrester
• Extremely high lightning current discharge capacity
• High follow current extinguishing capability and limitation
due RADAX Flow technology
• Directly coordinated with DEHNguard surge protective
devices without additional cable length
• 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 1 440: Coordinated single-pole lightning current arrester with high follow current limitation for UC = 440 V
DEHNbloc Maxi 1 440 FM: With remote signalling contact for monitoring device (floating changeover contact)
DEHNbloc Maxi 1 760 FM: Coordinated single-pole lightning current arrester with high follow current limitation for UC = 760 V
With remote signalling contact for monitoring device (floating changeover contact) Lightning Current Arresters – Type 1

The coordinated DEHNbloc Maxi 440 and 760 lightning current arresters The operating state / fault indicator of the coordinated lightning current
are specifically designed for high system voltages. arresters does not cause operating currents and immediately shows the
For a large number of industrial applications, this makes effective protec- operating state of the devices. Apart from the standard visual indication
tion against direct and indirect lightning currents possible. with green and red indicator flags, DEHNbloc Maxi 1 ... FM features a
Be it in a wind turbine or a stand-alone low-voltage installation of an three-pole remote signalling terminal. As the remote signalling contact is
designed as a floating changeover contact, the remote signal can, depend-
industrial enterprise, DEHNbloc Maxi devices effortlessly fulfil the speci- ing on the circuit concept, be used as a make or break contact.
fied requirements.
Both the design of the protective circuit and the enclosure specifically
designed for this type of arrester are particularly adapted to high system
voltages.
The proven RADAX Flow technology is the core element of the coordinat-
ed DEHNbloc Maxi 440 and 760 lightning current arresters. What makes
these devices special is their ability to considerably limit mains follow
currents and extinguish them within just a few milliseconds.
The patented RADAX Flow follow current limitation ensures that low-val-
ue fuses are not tripped by follow currents.
The ability to discharge lightning currents without destruction and to sup-
press mains follow currents without tripping upstream overcurrent pro-
tective devices ensures a high degree of availability in electrical installa-
tions.

Valid as of August 1, 2020 You will find detailed product information on our website 39