DEHNbloc®
|  For protecting low-voltage consumer’s installations against surges and even direct lightning strikes. For installation in conformity with the lightning protection zones concept at the boundaries from 0A – 1. |
Details
 | DEHNbloc H M 1 255: Modular single-pole lightning current arrester with high follow current limitation 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 |
The spark gaps of the DEHNbloc lightning current arresters allow a compact configuration of low-voltage distribution boards. When using pressurised, encapsulated creepage discharge spark gaps, no safety distance from busbars and no special flameproof enclosures are necessary. With a lightning current discharge capacity up to 50 kA (10/350 µs) per pole, DEHNbloc devices fulfil the most stringent requirements of 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 follow current limitation was integrated into the DEHNbloc family. The RADAX Flow technology prevents that system operation is disrupted due to a tripped line protection as soon as the arresters operate. In times where all systems increasingly depend on a properly functioning electrical infrastructure, this is an indispensable product feature. Thanks to the patented RADAX Flow principle, even the amplitudes of short circuits in installations up to 50 kArms can be limited to approx. 500 A and extinguished after approximately 5 ms. This feature ensures selectivity of the arrester even in case of low-value 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 and gives the necessary support and safely fixes the protection module to the base part even at maximum loads on the protection module. The modules can be easily replaced without tools by simply pressing the user-friendly module release button of the protection module. The devices incorporate double terminals suitable for all conductors, allowing series connection of even three-pole DEHNbloc 3 255 H arresters in a space-saving and cost-effective way according to IEC 60364-5-53 requirements for nominal currents up to 125 A. If DEHNbloc is to be used with other DIN rail mounted devices, multifunctional terminals are ideally suited for providing connection for conductors and busbars. |
Further Models / Accessory:
 DEHNbloc H |  DEHNbloc ... 255 H |  DEHNbloc NH00 255 H |  Accessories |
DEHNbloc H
|  Basic circuit diagram DBH M 1 255 |  Dimension drawing DBH M 1 255 |
Modular single-pole lightning current arrester with high follow current limitation for UC = 255 V
- Encapsulated non-exhausting creepage discharge spark gap
- RADAX Flow spark gap technology with high follow current limitation
- Can also be used upstream meter panels due to high insulation resistance
| Type | ||
|---|---|---|
| Part No. | ||
| SPD according to EN 61643-11 | ||
| SPD according to IEC 61643-1 | ||
| Nominal a.c. voltage | UN | V |
| Max. continuous operating a.c. voltage | UC | V |
| Lightning impulse current (10/350 µs) | Iimp | kA |
| Nominal discharge current (8/20 µs) | IN | kA |
| Voltage protection level | UP | kV |
| Follow current extinguishing capability a.c. | Ifi | kArms |
| Follow current limitation / Selectivity | ||
| Response time | tA | ns |
| Max. backup fuse (L) up to IK = 50 kArms (ta ≤ 0.2 s) | A gL/gG | |
| Max. backup fuse (L) up to IK = 50 kArms (ta ≤ 5 s) | A gL/gG | |
| Max. backup fuse (L) for IK > 50 kArms | A gL/gG | |
| Max. backup fuse (L-L') | A gL/gG | |
| Temporary overvoltage (TOV) | UT | V / 5 sec. |
| TOV characteristic | ||
| Operating temperature range (parallel connection) | TUP | |
| Operating temperature range (series connection) | TUS | |
| Number of ports | ||
| Cross-sectional area (L/N, L'/N', N/PE(N)) | min. | |
| Cross-sectional area (L/N, N/PE(N)) | max. | |
| Cross-sectional area (L'/N') | max. | |
| For mounting on | ||
| Enclosure material | ||
| Place of installation | ||
| Degree of protection | ||
| Capacity | module(s), DIN 43880 | |
| Amount | ||
| Further Pictures | ||
| Options |
| DBH M 1 255 |
|---|
| 961 122 |
| Type 1 |
| Class I |
| 230 |
| 255 |
| 50 |
| 50 |
| ≤ 4 |
| 50 |
| no tripping of a 32 A gL/gG fuse up to 50 kArms (prosp.) |
| ≤ 100 |
| 500 |
| 315 |
| 200 |
| 125 |
| 440 |
| withstand |
| -40°C...+80°C |
| -40°C...+60°C |
| 1 |
| 10 mm2 solid/flexible |
| 50 mm2 stranded/35 mm2 flexible |
| 35 mm2 stranded/25 mm2 flexible |
| 35 mm DIN rails acc. to EN 60715 |
| thermoplastic, red, UL 94 V-0 |
| indoor |
| IP 20 |
| 2 |
pc(s)  |
   |
| Further Information |
DEHNbloc ... 255 H
|  Basic circuit diagram DB 1 255 H / DB 3 255 H |  Dimension drawing DB 1 255 H / DB 3 255 H |
Single-pole and three-pole lightning current arrester with high follow current limitation
- Encapsulated non-exhausting creepage discharge spark gap
- RACAX Flow spark gap technology with high follow current limitation
- Can also be used upstream of meter panels due to its high insulation resistance
| Type | ||
|---|---|---|
| Part No. | ||
| SPD according to EN 61643-11 | ||
| SPD according to IEC 61643-1 | ||
| Nominal a.c. voltage | UN | V |
| Max. continuous operating a.c. voltage | UC | V |
| Lightning impulse current (10/350 µs) | Iimp | kA |
| Specific energy | W/R | |
| Lightning impulse current (10/350 µs) [L-N/PEN] | Iimp | kA |
| Specific energy [L-N/PEN] | W/R | |
| Lightning impulse current (10/350 µs) [L1+L2+L3-N/PEN] | Itotal | kA |
| Specific energy [L1+L2+L3-N/PEN] | W/R | |
| Nominal discharge current (8/20 µs) | IN | kA |
| Voltage protection level | UP | kV |
| Follow current extinguishing capability a.c. | Ifi | kArms |
| Follow current limitation / Selectivity | ||
| Response time | tA | ns |
| Max. backup fuse up to IK = 50 kArms (ta ≤ 0.2 s) | A gL/gG | |
| Max. backup fuse up to IK = 50 kArms (ta ≤ 5 s) | A gL/gG | |
| Max. backup fuse for IK > 50 kArms | A gL/gG | |
| Max. backup fuse (L-L') | A gL/gG | |
| Temporary overvoltage (TOV) | UT | V / 5 sec. |
| TOV characteristic | ||
| Operating temperature range (parallel connection) | TUP | |
| Operating temperature range (series connection) | TUS | |
| Number of ports | ||
| Cross-sectional area (L, L', N/PEN, N'/PEN) | min. | |
| Cross-sectional area (L, N/PEN) | max. | |
| Cross-sectional area (L', N'/PEN) | max. | |
| Cross-sectional area (L1, L1', L2, L2', L3, L3', N/PEN, N'/PEN) | ||
| Cross-sectional area (L1, L2, L3, N/PEN) | ||
| Cross-sectional area (L1', L2', L3', N'/PEN) | ||
| For mounting on | ||
| Enclosure material | ||
| Place of installation | ||
| Degree of protection | ||
| Capacity | module(s), DIN 43880 | |
| Approvals | ||
| Amount | ||
| Options |
| DB 1 255 H | DB 3 255 H |
|---|---|
| 900 222 | 900 120 |
| Type 1 | Type 1 |
| Class I | Class I |
| 230 | 230/400 |
| 255 | 255 |
| 50 | |
| 625.00 kJ/ohms | |
| 50 | |
| 625.00 kJ/ohms | |
| 100 | |
| 2.50 MJ/ohms | |
| 50 | 50 / 100 |
| ≤ 4 | ≤ 4 |
| 50 | 50 |
| no tripping of a 32 A gL/gG fuse up to 50 kArms (prosp.) | no tripping of a 32 A gL/gG fuse up to 50 kArms (prosp.) |
| ≤ 100 | ≤ 100 |
| 500 | 500 |
| 315 | 315 |
| 200 | 200 |
| 125 | 125 |
| 335 | 335 |
| withstand | withstand |
| -40°C...+80°C | -40°C...+80°C |
| -40°C...+60°C | -40°C...+60°C |
| 1 | 1 |
| 10 mm2 solid/flexible | |
| 50 mm2 stranded/35 mm2 flexible | |
| 35 mm2 stranded/25 mm2 flexible | |
| 10 mm2 solid/flexible | |
| 50 mm2 stranded/35 mm2 flexible | |
| 35 mm2 stranded/25 mm2 flexible | |
| 35 mm DIN rails acc. to EN 60715 | 35 mm DIN rails acc. to EN 60715 |
| thermoplastic, red, UL 94 V-0 | thermoplastic, red, UL 94 V-0 |
| indoor | indoor |
| IP 20 | IP 20 |
| 2 | 6 |
| KEMA, VDE | KEMA, VDE |
pc(s) | pc(s) |
| Further Information | Further Information |
DEHNbloc NH00 255 H
|  Basic circuit diagram DB NH00 255 H |  Dimension drawing DB NH00 255 H |
Single-pole lightning current arrester in NH design, size 00, with high follow current limitation
- Lightning current arrester in NH 00 design with a discharge capacity of 25 kA
- Encapsulated RADAX Flow spark gap with high follow current limitation
- "Wavebreaker function" allows energy coordination with downstream varistor-based surge arresters, e.g. DEHNguard and/or the device to be protected
- Can also be used upstream of meter panels due to its high insulation resistance
- Double terminals for series connection
| Type | ||
|---|---|---|
| Part No. | ||
| SPD according to EN 61643-11 | ||
| SPD according to IEC 61643-1 | ||
| Max. continuous operating a.c. voltage | UC | V |
| Lightning impulse current (10/350 µs) | Iimp | kA |
| Specific energy | W/R | |
| Nominal discharge current (8/20 µs) | IN | kA |
| Voltage protection level | UP | kV |
| Follow current extinguishing capability a.c. | Ifi | kArms |
| Follow current limitation / Selectivity | ||
| Response time | tA | ns |
| Max. backup fuse up to IK = 50 kArms (ta ≤ 0.2 s) | A gL/gG | |
| Max. backup fuse up to IK = 50 kArms (ta ≤ 5 s) | A gL/gG | |
| Max. backup fuse for IK > 50 kArms | A gL/gG | |
| Temporary overvoltage (TOV) | UT | V / 5 sec. |
| TOV characteristic | ||
| Operating temperature range | TU | |
| Number of ports | ||
| For mounting on | ||
| Enclosure material | ||
| Place of installation | ||
| Degree of protection | ||
| Amount | ||
| Further Pictures | ||
| Options |
| 900 273 |
|---|
| Type 1 |
| Class I |
| 255 |
| 25 |
| 156.25 kJ/ohms |
| 25 |
| ≤ 4 |
| 50 |
| no tripping of a 32 A gL/gG fuse up to 50 kArms (prosp.) |
| ≤ 100 |
| 315 |
| 200 |
| 125 |
| 440 |
| withstand |
| -40°C...+80°C |
| 1 |
| NH fuse holders, size 00 |
| thermoplastic, red, UL 94 V-0 |
| indoor |
| IPX4W |
|
   |
| Further Information |
Accessories
DB H spark-gap-based protection module
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