Lightning Current Arrester
- Encapsulated creepage discharge spark gap without venting means
- RADAX Flow spark gap technology with high follow current limitation
- Energy coordination with other arresters of the Red/Line product family
- Can also be used upstream of meter panels due to its high insulation resistance
- Multifunctional terminal for connecting conductors and busbars
- Single-pole and three-pole version (lightning impulse currents up to 100 kA depending on the system configuration)
- Modular single-pole version also available
DEHNbloc 1 255 H: Single-pole lightning current arrester with high follow current limitation
DEHNbloc 3 255 H: Three-pole lightning current arrester with high follow current limitation
With a lightning current discharge capacity up to 50 kA (10/350 µs) per pole, DEHNbloc devices fulfil the highest national and international lightning protection and application standards.
The consistent improvement of the integration concept made the DEHNbloc devices even more efficient: With DEHNbloc H, the groundbreaking RADAX Flow spark gap technology for follow current extinction and limitation was integrated into the DEHNbloc family.
The RADAX Flow technology prevents that system operation is disrupted due to a tripped circuit breaker as soon as the arrester operates. In times where systems increasingly depend on a properly functioning electrical infrastructure, this is an indispensable product feature. Thanks to the patented RADAX Flow principle, even the amplitude of short-circuit currents in installations up to 50 kArms can be limited to approx. 500 A and extinguished after approximately 5 ms. This feature ensures selectivity even in case of low-current-rated fuses.
But the DEHNbloc H family concept also stands out due to other product features: With its double terminals on the phase and earth side, the single-pole DEHNbloc 1 255 H device offers various application options.
The DBH M 1 255 device with a new arrester design features the approved module release system that safely fixes the protection module to the base part even at maximum loads on the protection module. The module can be easily replaced without tools by simply pressing the module release button of the protection module.
By using the double terminals suitable for all conductors, even three-pole DEHNbloc 3 255 H arresters can be connected in series in a space-saving and cost-effective way up to nominal currents of 125 A as preferred by IEC 60364-5-53.
If DEHNbloc is to be used with other DIN rail mounted devices, the multifunctional terminals are ideally suited for providing connection for conductors and busbars.