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BLITZDUCTOR ® XT LifeCheck ® Modules
BXT ML4 BC 5 / 24
Pluggable DIN Rail Mounted SPDs
1
1´
2
2´
45
3
4
protected
3´
4´
12 51
(2/3 mods.)
• LifeCheck SPD monitoring function
• Optimal protection of max. four lines
• For installation in conformity with the
lightning protection zones concept at
the boundaries from 0 A – 2 and higher
Basic circuit diagram BXT ML4 BC
Dimension drawing BXT ML4 BC
Space-saving combined lightning current and surge arrester module with LifeCheck feature for protecting
max. four unearthed single lines with common reference potential. If LifeCheck detects thermal
or electrical overload, the arrester has to be replaced. This status is indicated contactlessly by
the DEHNrecord LC / MCM reader.
Type BXT ML4 BC 5 BXT ML4 BC 24
Part No. 920 350 920 354
SPD class M M
SPD monitoring system LifeCheck LifeCheck
Nominal voltage (U N ) 5 V 24 V
Max. continuous operating d.c. voltage (U C ) 6.0 V 33 V
Max. continuous operating a.c. voltage (U C ) 4.2 V 23.3 V
Nominal current at 45°C (I L ) 1.0 A 0.75 A
D1 Total lightning impulse current (10/350 μs) (I imp ) 10 kA 10 kA
D1 Lightning impulse current (10/350 μs) per line (I imp ) 2.5 kA 2.5 kA
C2 Total nominal discharge current (8/20 μs) (I n ) 20 kA 20 kA
C2 Nominal discharge current (8/20 μs) per line (I n ) 10 kA 10 kA
Voltage protection level line-line for I imp D1 (U p ) ≤ 25 V ≤ 55 V
Voltage protection level line-PG for I imp D1 (U p ) ≤ 550 V ≤ 550 V
Voltage protection level line-line at 1 kV/μs C3 (U p ) ≤ 9 V ≤ 45 V
Voltage protection level line-PG at 1 kV/μs C3 (U p ) ≤ 550 V ≤ 550 V
Series impedance per line 1.0 ohm 1.8 ohms
Cut-off frequency line-line (f G ) 1.0 MHz 5.7 MHz
Capacitance line-line (C) ≤ 5.4 nF ≤ 1.0 nF
Capacitance line-PG (C) ≤ 16 pF ≤ 16 pF
Operating temperature range -40°C...+80°C -40°C...+80°C
Degree of protection (with plugged-in protection module) IP 20 IP 20
Pluggable into base part base part
Earthing via base part base part
Enclosure material polyamide PA 6.6 polyamide PA 6.6
Colour yellow yellow
Test standards IEC 61643-21 / EN 61643-21, UL 497B IEC 61643-21 / EN 61643-21, UL 497B
SIL classification SIL2 / SIL3 * ) SIL2 / SIL3 * )
ATEX approvals DEKRA 11ATEX0089 X: II 3 G Ex nA IIC T4 Gc DEKRA 11ATEX0089 X: II 3 G Ex nA IIC T4 Gc
IECEx approvals DEK 11.0032X: Ex nA IIC T4 Gc DEK 11.0032X: Ex nA IIC T4 Gc
Approvals CSA, VdS, GOST CSA, VdS, GOST
920 350
BXT ML4 BC 5
920 354
BXT ML4 BC 24
BXT ML4 BC 5
920 350
Kombiableiter-Modul für 4 EinzeladernBLITZDUCTOR XT mit LifeCheck
BXT ML4 BC 24
920 354
Kombiableiter-Modul für 4 EinzeladernBLITZDUCTOR XT mit LifeCheck
*) For more detailed information, please refer to www.dehn.de/en/sil/ and page 210
Accessories for BLITZDUCTOR ® XT LifeCheck ® Modules
BXT BAS
Base part as a very space-saving,
four-pole, universal feed-through
terminal for the insertion of a protection
module without signal
interruption.
Type
BXT BAS
Part No. 920 300
Colour
yellow
DRC MCM XT
DIN rail mounted device with integrated
LifeCheck sensor for condition
monitoring of max. 10 Life -
Check-equipped BXT arresters.
Type
DRC MCM XT
Part No. 910 695
Colour
grey
DRC LC M3+
Portable device with LifeCheck
sensor for flexible use. Fast and
easy testing of LifeCheck-equipped
arresters.
Type DRC LC M3+
Part No. 910 653
Dimensions of
storage case 340 x 275 x 83 mm
For ”Accessories for BLITZDUCTOR XT LifeCheck modules“, please also refer to pages 188/206/207/208/368/370.
192 www.dehn.de