Surge arrester BXT ML2 BD S 24 (920 244) DALI-Bus
Type: DEHN 920 244 Surge arrester BXT ML2 BD S 24 DALI-Bus/ with Life Check
EAN: 4013364117792
Assembly: must be purchased together with the base BXT BAS (not included in the package)
Space-saving combination arrester module with Life Check to protect 1 pair of ungrounded symmetrical interfaces, either direct or indirect shield ground. LifeCheck detects thermal or electrical overload conditions after which the arrester must be replaced. The display is contactless using DEHNrecord LC / SCM / MCM.
Technical specifications
Arrest Monitoring: Life Check
Security class: Type 1
Nominal voltage (UN): 24V
Maximum continuous DC voltage (UC): 33 V
Maximum continuous AC voltage (UC): 23.3 V
Rated current at 45 degrees Celsius (IL): 1.0A
D1 lightning impulse current (10/350 µs) total (Iimp): 9 kA
D1 lightning impulse current (10/350 µs) per conductor (Iimp): 2.5 kA
C2 Rated discharge current (8/20 µs) total (In): 20 kA
C2 Nominal discharge current (8/20 µs) per core (In): 10 kA
Ad-Ad protection level at Iimp D1 (up): 52V
Ad-PG protection level at Iimp D1 (up): 550V
Ad-Ad protection level at 1 kV/µs C3 (up): 45 V
Ad-PG protection level at 1 kV/µs C3 (Up): 550 V
Series impedance per wire: 1.0 ohms
Ad-ad limit frequency (fG): 7.8 MHz
Line-line capacitance (C): 1.0 nF
Capacitance of ad-PG (C): 25 pF
Operating temperature range (TU): -40... +80 degrees Celsius
Degree of protection (connected): IP 20
Can be plugged into the base unit: BXT BAS
Grounding through the base part of the BXT BAS
Case material: Polyamide PA 6.6
Test standards: IEC 61643-21 / EN 61643-21
Approvals: CSA, EAC, ATEX, IECEx, CSA & USA Hazloc, SIL
SIL classification: up to SIL3
ATEX approvals: DEKRA 11ATEX0089 X: II 3 G Ex nA IIC T4 Gc
Approvals IECEx: DEK 11.0032X: Ex nA IIC T4 Gc
CSA and USA Hazloc Approvals (1): 2516389: Class I Div. 2 GP A, B, C, D T4
CSA and USA Hazloc Approvals (2): 2516389: Class I Zone 2, AEx nA IIC T4
Link to manufacturer information
Estimated delivery time: 6 - 10 days
