DEHNbloc® Maxi
|  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
 | DBM NH00 255: Coordinated single-pole lightning current arrester in NH00 design with high follow current limitation for UC = 255 V |
 | The coordinated DEHNbloc Maxi ... lightning current arresters adapt themselves to every kind of application. Be it in exposed locations or harsh industrial environments: DEHNbloc Maxi ... always offers the right solution. The single-pole device is coordinated with the approved DEHNguard and V(A) NH surge arresters of the Red/Line family. Independent of cable lengths and without the need for additional decoupling coils, the surge protection concept can be tailored to meet the specific requirements of the installation. DEHNbloc Maxi arresters are based on the patented encapsulated creepage discharge spark gap and RADAX Flow follow current limitation technology. There is no need for installers to worry about safety distances from busbars or equipment. This arrangement also eliminates the risk of tripped backup fuses resulting from the lack of selectivity between the protective device and any overcurrent protection systems that may be in place, resulting in the highest possible system availability. DEHNbloc Maxi NH00 255 was specifically designed for industrial distribution boards and supply systems and allows compact and space-saving installation in size 00 NH fuse holders or NH disconnectors depending on the particular system. |
DEHNbloc Maxi NH00 255
 |  Basic circuit diagram DBM NH00 255 |  Dimension drawing DBM NH00 255 |
Coordinated single-pole lightning current arrester in NH00 design with high follow current limitation for UC = 255 V
- Encapsulated RADAX Flow spark gap with high follow current limitation
- High lightning current discharge capability
- Directly coordinated with DEHNguard ... and V(A) NH ... surge protective devices without additional cable length
| 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 (L) up to IK = 50 kArms | A gL/gG | |
| Max. backup fuse (L) for IK > 50 kArms | A gL/gG | |
| Temporary overvoltage (TOV) | UT | V / 5 sec. |
| TOV characteristic | ||
| Operating temperature range (parallel connection) | TUP | |
| Number of ports | ||
| For mounting on | ||
| Enclosure material | ||
| Place of installation | ||
| Degree of protection | ||
| Amount | ||
| Further Pictures | ||
| Options |
| DBM NH00 255 |
|---|
| 900 255 |
| Type 1 |
| Class I |
| 255 |
| 25 |
| 156.25 kJ/ohms |
| 25 |
| ≤ 2.5 |
| 50 |
| no tripping of a 32 A gL/gG fuse up to 50 kArms (prosp.) |
| ≤ 100 |
| 315 |
| 200 |
| 440 |
| withstand |
| -40°C...+80°C |
| 1 |
| NH fuse holder size 00 |
| thermoplastic, red, UL 94 V-0 |
| indoor |
| IPX4W |
pc(s)  |
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| Further Information |
