DEHNbloc

Lightning Current Arrester

For protecting low-voltage consumer’s installations against surges and even direct lightning strikes. For installation in conformity with the lightning protection zone concept at the boundaries from 0A– 1.
  • 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

Version

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

Details

The spark gaps of the DEHNbloc lightning current arresters allow compact configuration of low-voltage distribution boards. By using pressurised and encapsulated creepage discharge spark gaps, no safety distance from busbars and special flameproof enclosures are necessary.

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.

Models

DEHNbloc H

DEHNbloc 1 255 H

DEHNbloc 3 255 H

DEHNbloc H

Basic circuit diagram DBH M 1 255Dimension drawing DBH M 1 255

Modular single-pole lightning current arrester with a high discharge capacity for use in 230 / 400 V systems.


Specifications

Type
Part No.
SPD according to EN 61643-11 / IEC 61643-11
Nominal voltage (a.c.) (UN)
Max. continuous operating voltage (a.c.) (UC)
Lightning impulse current (10/350 µs) (Iimp)
Specific energy (W/R)
Voltage protection level (UP)
Follow current extinguishing capability (a.c.) (Ifi)
Follow current limitation / Selectivity
Response time (tA)
Max. backup fuse (L) up to IK = 50 kArms (ta ≤ 0.2 s)
Max. backup fuse (L) up to IK = 50 kArms (ta ≤ 5 s)
Max. backup fuse (L-L')
Temporary overvoltage (TOV) (UT) – 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
Extended technical data:
– Max. prospective short-circuit current
– Limitation / Extinction of mains follow currents
– Max. backup fuse (L) up to IK = 100 kArms (ta ≤ 0.2 s)
– Max. backup fuse (L) up to IK = 100 kArms (ta ≤ 5 s)
Weight
GTIN
PU
Part No.
  • DBH M 1 255
  • 961 122
  • type 1 / class I
  • 230 V (50 / 60 Hz)
  • 255 V (50 / 60 Hz)
  • 50 kA
  • 625.00 kJ/Ohm
  • ≤ 4 kV
  • 50 kArms
  • no tripping of a 32 A gG fuse up to 50 kArms (prosp.)
  • ≤ 100 ns
  • 500 A gG
  • 315 A gG
  • 125 A gG
  • 440 V / 120 min. – 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 installation
  • IP 20
  • 2 module(s), DIN 43880
  • Use in switchgear installations with prospective short-circuit currents of more than 50 kArms (tested by the German VDE)
  • 100 kArms (220 kApeak)
  • up to 100 kArms (220 kApeak)
  • 500  A gG
  • 315  A gG
  • 358 g
  • 4013364118652
  • 1 pc(s)
  • 961 122
  • Specifications (PDF)
  • More
    • Further Pictures
      Basic circuit diagram DBH M 1 255
      open PDF
      Dimension drawing  DBH M 1 255
      open PDF
      Further Information
      Product Specifications (Text)

      Back

      Modular DEHNbloc H M 1 255 lightning current arrester
      Modular, pluggable and coordinated single-pole 
      lightning current arrester
      with high follow current limitation, width: 2 modules
      Type 1 SPD according to EN 61643-11
      RADAX Flow spark gap technology 
      for follow current limitation
      Fault indication 
      Max. continuous operating voltage: 255 V a.c.
      Voltage protection level: <= 4 kV
      Lightning impulse current (10/350 µs): 50 kA
      Follow current extinguishing capability: up to 100 Arms 
      Energy-coordinated according to IEC 62305-4 
      with arresters of the Red/Line series

      delivery and installation.

      Brand: DEHN
      Type: DBH M 1 255
      Part No.: 961 122

      or equivalent.
      Installation Instructions
      Certificates
      CE_DBH_M_1_255
      CAD-Data for registered Users
      961110.stp
      961110.igs
      961110.jt
      961110.dwg
      961110m_E.dxf

DEHNbloc 1 255 H

Basic circuit diagram DB 1 255 HDimension drawing DB 1 255 H

Single-pole (3-0 configuration) lightning current arrester with a high discharge capacity for use in 230 / 400 V systems.


Specifications

Type
Part No.
SPD according to EN 61643-11 / IEC 61643-11
Nominal voltage (a.c.) (UN)
Max. continuous operating voltage (a.c.) (UC)
Lightning impulse current (10/350 µs) (Iimp)
Specific energy (W/R)
Voltage protection level (UP)
Follow current extinguishing capability (a.c.) (Ifi)
Follow current limitation / Selectivity
Response time (tA)
Max. backup fuse up to IK = 50 kArms (ta ≤ 0.2 s)
Max. backup fuse up to IK = 50 kArms (ta ≤ 5 s)
Max. backup fuse for IK > 50 kArms
Max. backup fuse (L-L')
Temporary overvoltage (TOV) (UT) – 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.)
For mounting on
Enclosure material
Place of installation
Degree of protection
Capacity
Approvals
Weight
GTIN
PU
Part No.
  • DB 1 255 H
  • 900 222
  • type 1 / class I
  • 230 V (50 / 60 Hz)
  • 255 V (50 / 60 Hz)
  • 50 kA
  • 625.00 kJ/ohms
  • ≤ 4 kV
  • 50 kArms
  • no tripping of a 32 A gG fuse up to 50 kArms (prosp.)
  • ≤ 100 ns
  • 500 A gG
  • 315 A gG
  • 200 A gG
  • 125 A gG
  • 440 V / 120 min. – 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 installation
  • IP 20
  • 2 module(s), DIN 43880
  • KEMA
  • 331 g
  • 4013364102521
  • 1 pc(s)
  • 900 222
  • Specifications (PDF)
  • More

DEHNbloc 3 255 H

Basic circuit diagram DB 3 255 HDimension drawing DB 3 255 H

Three-pole (3-0 configuration) lightning current arrester with a high discharge capacity for use in 230 / 400 V systems.


Specifications

Type
Part No.
SPD according to EN 61643-11 / IEC 61643-11
Nominal voltage (a.c.) (UN)
Max. continuous operating voltage (a.c.) (UC)
Lightning impulse current (10/350 µs) [L-N/PEN] (Iimp)
Specific energy [L-N/PEN] (W/R)
Lightning impulse current (10/350 µs) [L1+L2+L3-N/PEN] (Itotal)
Specific energy [L1+L2+L3-N/PEN] (W/R)
Voltage protection level (UP)
Follow current extinguishing capability (a.c.) (Ifi)
Follow current limitation / Selectivity
Response time (tA)
Max. backup fuse up to IK = 50 kArms (ta ≤ 0.2 s)
Max. backup fuse up to IK = 50 kArms (ta ≤ 5 s)
Max. backup fuse for IK > 50 kArms
Max. backup fuse (L-L')
Temporary overvoltage (TOV) (UT) – Characteristic
Operating temperature range (parallel connection) (TUP)
Operating temperature range (series connection) (TUS)
Number of ports
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
Approvals
Weight
GTIN
PU
Part No.
  • DB 3 255 H
  • 900 120
  • type 1 / class I
  • 230 / 400 V (50 / 60 Hz)
  • 255 V (50 / 60 Hz)
  • 50 kA
  • 625.00 kJ/ohms
  • 100 kA
  • 2.50 MJ/ohms
  • ≤ 4 kV
  • 50 kArms
  • no tripping of a 32 A gG fuse up to 50 kArms (prosp.)
  • ≤ 100 ns
  • 500 A gG
  • 315 A gG
  • 200 A gG
  • 125 A gG
  • 440 V / 120 min. – 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 installation
  • IP 20
  • 6 module(s), DIN 43880
  • KEMA
  • 873 g
  • 4013364109377
  • 1 pc(s)
  • 900 120
  • Specifications (PDF)
  • More

Accessories

DB H Spark-Gap-Based Protection Module

Spark-gap-based protection module

Show SpecificationsHide Specifications

Specifications

Type
Part No.
Max. continuous operating voltage (a.c.) (UC)
Lightning impulse current (10/350 µs) (Iimp)
Follow current extinguishing capability (a.c.) (Ifi)
Weight
GTIN
PU
  • DBH MOD 255
  • 961 022
  • 255 V
  • 50 kA
  • 50 kArms
  • 195 g
  • 4013364118669
  • 1 pc(s)
  • Specifications (PDF)
  • More
    • Further Pictures
      open PDF
      Further Information
      Product Specifications (Text)

      Back

      DBH MOD 255 spark-gap-based protection module
      Spark-gap-based protection module for 
      coordinated single-pole type 1 arresters of 
      the Red/Line product series according to EN 61643-11
      Heavy-duty creepage discharge spark gap
      Max. continuous operating voltage: 255 V a.c.
      Lightning impulse current: up to 50 kArms (prosp.) 

      delivery and installation.

      Brand: DEHN
      Type: DBH MOD 255
      Part No.: 961 022

      or equivalent.
      Installation Instructions

STAK 2X16 Pin-shaped Terminal

Allows to connect cross-sections that are smaller than the specified minimum terminal cross section of the surge protective device

Show SpecificationsHide Specifications

Specifications

Type
Part No.
Lightning impulse current (10/350 µs)
Cross-sectional area (min.)
Cross-sectional area (max.)
Type of connection
Weight
GTIN
PU
  • STAK 2X16
  • 900 589
  • 25 kA
  • 2x 1,5 mm2
  • 2x max. 16 mm2
  • front (double terminal)
  • 20 g
  • 4013364109339
  • 1 pc(s)
  • Specifications (PDF)
  • More
    • Further Pictures
      open PDF
      Further Information
      Product Specifications (Text)

      Back

      STAK 2X16 pin-shaped terminal
      Double terminal for serial connection
      Cross-sectional area:		2 x 16 mm²
      
      

      delivery and installation.

      Brand: DEHN
      Type: STAK 2X16
      Part No.: 900 589

      or equivalent.