DEHNbloc

Encapsulated non-exhausting creepage discharge spark gap
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 H

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

1 Product

Part No. 961122 DBH M 1 255

GTIN 4013364118652, Customs tariff No. (EU): 85363090, Gross weight: 374.20 g, PU: 1.00 pc(s)

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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

Brand: DEHN
Type: DBH M 1 255
Part No.: 961122
or equivalent.

Certificates

Wave breaker function

In the case of spark-gap-based type 1 arresters, the entire current flows through the type 1 arrester during the discharge process. Like a wave breaker, the incoming energy is greatly broken down, which significantly relieves the downstream SPDs. All type 1 arresters in the Red/Line product range feature the WBF wave breaker function.

Technical data

SPD according to EN 61643-11 / IEC 61643-11	type 1 / class I
Max. continuous operating voltage (a.c.) (U_C )	255 V (50 / 60 Hz)
Lightning impulse current (10/350 µs) (I_imp )	50 kA
Voltage protection level (U_P )	≤ 4 kV
Max. backup fuse (L) up to I_K= 50 kA_rms(t_a≤ 0.2 s)	500 A gG
Max. backup fuse (L) up to I_K= 50 kA_rms(t_a≤ 5 s)	315 A gG

SPD according to EN 61643-11 / IEC 61643-11	type 1 / class I
Nominal voltage (a.c.) (U_N )	230 V (50 / 60 Hz)
Max. continuous operating voltage (a.c.) (U_C )	255 V (50 / 60 Hz)
Lightning impulse current (10/350 µs) (I_imp )	50 kA
Specific energy (W/R)	625.00 kJ/Ohm
Voltage protection level (U_P )	≤ 4 kV
Follow current extinguishing capability (a.c.) (I_fi )	50 kA_rms
Follow current limitation / Selectivity	no tripping of a 32 A gG fuse up to 50 kA_rms (prosp.)
Response time (t_A )	≤ 100 ns
Max. backup fuse (L) up to I_K= 50 kA_rms(t_a≤ 0.2 s)	500 A gG
Max. backup fuse (L) up to I_K= 50 kA_rms(t_a≤ 5 s)	315 A gG
Max. backup fuse (L-L')	125 A gG
Temporary overvoltage (TOV) (U_T) – Characteristic	440 V / 120 min. – withstand
Operating temperature range (parallel connection) (T_UP )	-40 °C ... +80 °C
Operating temperature range (series connection) (T_US )	-40 °C ... +60 °C
Number of ports	1
Cross-sectional area (L/N, L'/N', N/PE(N)) (min.)	10 mm² solid/flexible
Cross-sectional area (L/N, N/PE(N)) (max.)	50 mm² stranded / 35 mm² flexible
Cross-sectional area (L'/N') (max.)	35 mm² stranded / 25 mm² flexible
For mounting on	35 mm DIN rails acc. to EN 60715
Enclosure material	thermoplastic, red, UL 94 V-0
Place of installation	indoor installation
Degree of protection	IP 20
Capacity	2 module(s), DIN 43880
Extended technical data:	Use in switchgear installations with prospective short-circuit currents of more than 50 kArms (tested by the German VDE)
– Max. prospective short-circuit current	100 kA_rms (220 kA_peak)
– Limitation / Extinction of mains follow currents	up to 100 kA_rms(220 kA_peak)
– Max. backup fuse (L) up to I_K = 100 kA_rms (t_a ≤ 0.2 s)	500 A gG
– Max. backup fuse (L) up to I_K = 100 kA_rms (t_a ≤ 5 s)	315 A gG

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DEHNbloc

DEHNbloc H

Part No. 961122 DBH M 1 255

Wave breaker function

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DEHNbloc

DEHNbloc H

Part No. 961122 DBH M 1 255

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Wave breaker function

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