DEHNbloc Maxi

Encapsulated RADAX Flow spark gap with high follow current limitation
No tripping of 32 A gG fuses up to short-circuit currents of 50 kA_rms
High lightning current discharge capacity
Directly coordinated with DEHNguard ... and V(A) NH ... surge protective devices without additional cable length
NH00 design
Low voltage protection level

Details

DEHNbloc Maxi NH00 255

Coordinated single-pole lightning current arrester in NH00 design for TN-C and TN-S systems with a nominal voltage of 230 / 400 V.

1 Product

Part No. 900255 DBM NH00 255

GTIN 4013364125773, Customs tariff No. (EU): 85363090, Gross weight: 208.00 g, PU: 1.00 pc(s)

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Coordinated DEHNbloc Maxi NH00 255 lightning current arrester
Coordinated single-pole lightning current arrester
in NH 00 design with high follow current limitation
Type 1 SPD according to EN 61643-11
RADAX Flow spark gap technology
for follow current limitation
Max. continuous operating voltage: 255 V a.c.
Voltage protection level: <= 2.5 kV
Lightning impulse current (10/350): 25 kA
Follow current extinguishing capability: up to 100 kArms
Energy-coordinated with arresters of the
Red/Line series according to IEC 62305-4

Brand: DEHN
Type: DBM NH00 255
Part No.: 900255
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 )	25 kA
Voltage protection level (U_P )	≤ 2.5 kV
Max. backup fuse (L) up to I_K= 50 kA_rms	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 )	25 kA
Specific energy (W/R)	156.25 kJ/ohms
Voltage protection level (U_P )	≤ 2.5 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	315 A gG
Temporary overvoltage (TOV) (UT) – Characteristic	440 V / 120 min. – withstand
Operating temperature range (parallel connection) (T_UP )	-40 °C ... +80 °C
Number of ports	1
For mounting on	NH fuse holders of size NH00
Enclosure material	thermoplastic, red, UL 94 V-0
Place of installation	indoor installation
Degree of protection	according to installation situation
Extended technical data:	Use in switchgear installations with prospective short-circuit currents of more than 50 kA_rms (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	315 A gG

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DEHNbloc Maxi

Details

DEHNbloc Maxi NH00 255

Part No. 900255 DBM NH00 255

Wave breaker function

Product 900255 was added to Notepad.

Product 900255 was added to the cart.

DEHNbloc Maxi

Details

DEHNbloc Maxi NH00 255

Part No. 900255 DBM NH00 255

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Wave breaker function

Product 900255 was added to Notepad.

Product 900255 was added to the cart.