Page 45 - Surge-Protection-E_0.pdf

Coordinated Lightning Current Arresters – Type 1
WBF CIRCUIT INTERRUPTION
DEHN-FUNKENSTRECKEN-TECHNOLOGIE INSIDE
WELLENBRECHER-FUNKTION FUSE INTEGRATED
DEHNbloc Maxi S
• Spark-gap-based lightning current arrester with integrated
lightning current carrying backup fuse in a compact enclosure
• Directly mounted on the PEN / N busbar
• Low voltage protection level UP ≤ 2.5 kV
(including 80 cm connecting cable)
• Directly coordinated with DEHNguard surge protective device
without additional cable length
• Short-circuit withstand capability of 100 kArms (220 kApeak)
• High follow current extinguishing capability and limitation
due to RADAX Flow technology
• High lightning current discharge capacity
• With optical-fibre interface for SPD monitoring

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 1 255 S: Coordinated lightning current arrester with integrated backup fuse for busbar installation

DEHNbloc Maxi S can be easily integrated into the application environ- For 3+1 configurations, DEHNgap Maxi S provides a powerful creepage
ment of a low-voltage switchgear installation or distribution board. discharge spark gap with a discharge capacity of 100 kA (10/350 µs).
Thanks to its unique mechanical design, the coordinated DEHNbloc Maxi S DEHNbloc Maxi S also features patented RADAX Flow follow current lim- Lightning Current Arresters – Type 1
lightning current arrester can be directly mounted on the PEN / N busbar itation, thus ensuring selectivity even in case of low-current-rated fuses.
of a switchgear installation without the need for additional adapters. The ability to conduct lightning impulse currents without destruction and
With the backup fuse integrated in the device, no other separate backup to suppress mains follow currents without tripping upstream overcurrent
fuses need to be installed. protective devices ensures the availability of the switchgear installation
Installing DEHNbloc Maxi S directly into the connection panel of a switch- in the event of a lightning strike. This considerably reduces the risk of arc
gear installation upstream of the circuit breaker ensures short cable formation in the installation.
lengths of the arresters and a low voltage protection level for the instal- In conjunction with the DEHNsignal remote signalling system, the oper-
lation. In this environment, the VDE-tested DEHNbloc Maxi S can be used ating state of DEHNbloc Maxi S devices can be monitored at any time.
for short-circuit currents up to 100 kArms. Easy-to-implement optical fibre transmission to the DEHNsignal E 3 re-
With a discharge capacity of 25 kA (10/350 µs), DEHNbloc Maxi S fulfils mote signalling receiver module ensures safe electrical isolation between
the highest national and international lightning protection standards for the power circuit and the remote signalling circuit.
all three-phase current applications in TN and TT systems.

*) DEHNbloc Maxi S
DBM 1 255 S
**) DEHNgap Maxi S main circuit breaker main circuit breaker
DGPM 1 255 S
TT / TN-S
DSI E 3 TN-C
power supply DSI E 3
plastic LWL DSI
L1 plastic LWL DSI power supply
L2 L3 optical fibre cable L1 L2
max.6 m S N L L3 optical fibre cable
max.6 m S N L
without *) DEHNbloc Maxi S

wire DBM 1 255 S with
jumper N L wire
S/N
**) jumper
*) S/N N L
*) *)
*)
N busbar *) (PEN)
*)
PEN busbar
DEHNgap Maxi S
S N L
DGPM 1 255 S
PE busbar S N L
power supply equpotential bonding
F 230 V ~
L max.16 A gL/gG F power supply
equipotential bonding
9 ! N (C 16 A) ! L max.16 A gL/gG
230 V ~
N
(C 16 A)
All three optical fibre cables All three optical fibre cables

must be connected! must be connected!
3+1 application in a TT / TN-S system 3-0 application in a TN-C system
DEHNbloc Maxi 1 255 S 900 220 DBM 1 255 S
Coordinated single-pole lightning current arrester with integrated backup fuse for busbar installation in 230 / 400 V systems.
900 220 4013364106734 04 01 01 11 699 g
313,50 €
Type DBM 1 255 S
Part No. 900 220
SPD according to EN 61643-11 / IEC 61643-11 type 1 / class I
Max. continuous operating voltage (a.c.) (UC) 255 V (50 / 60 Hz)
Lightning impulse current (10/350 µs) (Iimp) 25 kA
Voltage protection level (UP) ≤ 2.5 kV (including 80 cm connecting cable)
Max. mains-side overcurrent protection not required
Operating state indication by optical fibre cables via DSI E 3
Valid as of August 1, 2020 You will find detailed product information on our website 41