Dehn Bloc Maxi 1 Lightning Current Arrester 255V – 900220

The DEHN DEHNbloc Maxi S is a single-pole, spark-gap-based lightning current arrester with an integrated backup fuse, suitable for industrial busbar systems. It offers a maximum continuous voltage of AC 255V and has a nominal discharge pulse current (8/20) of 25kA with a nominal AC voltage of 230V. This unit features a high follow current extinguishing capability and limitation due to RADAX Flow technology, designed for protecting low-voltage consumer installations against surges, including direct lightning strikes. It can be installed in line with the lightning protection zone concept at 0A – 1 boundaries.

Specifications

System configuration DC : No
System configuration IT : No
System configuration TN : Yes
System configuration TN-C : Yes
System configuration TN-C-S : Yes
System configuration TN-S : Yes
System configuration TT : Yes
System configuration other : No
Number of conductors (without earthing) : 1
Lightning impulse current (10/350 µs) (kA) : 25
Nominal discharge surge current (8/20) (kA) : 25
Max. continuous voltage AC (V) : 255
Nominal voltage AC (V) : 230
Voltage protection level (kV) : 2.5
Follow current extinguishing capability (kA) : 50
Specific energy (W/R) (kJ/Ohm) : 156.25
Mounting method : Busbar
With remote signalling contact : No
Exhausting : No
Signalling at the device : None
Category type 1 : Yes
Integrated backup fuse : No
Suitable for outdoor use : No