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BXT ML4 BD EX 24 Surge Arrester
Brand: DEHN, IncSpace-saving surge arrester module with LifeCheck feature for protecting two pairs of intrinsically safe measuring circuits and bus systems, meets FISCO requirements.
ATEX. Insulation strength >500 V line-earth.
If LifeCheck detects thermal or electrical overload, the arrester has to be replaced.
This status is indicated contactless by the DEHNrecord LC / SCM / MCM.
Features- For universal use, with LifeCheck monitoring function
- Self-capacitance and self-inductance negligibly small
- For installation in conformity with the lightning protection zone concept at the boundaries from 0B-2 and higher
Specifications
Brand
Approvals & Certifications
- ATEX (KEMA 06-ATEX-0274 X: II 2 (1) G Ex ia [ia Ga] IIC T4 to T6 Gb, II 2 G Ex Ib IIC T4 to T6 Gb)
- CE
- CSA & USA Hazloc (70000011: Class I, Div. 1, Class I, Zone 1 & Ex ia [ia] IIC T4 to T6)
- GOST
- IECEx (DEK 11.0078X: Ex ia [ia Ga] IIC T4 to T6 Gb, Ex Ib IIC T4 to T6 Gb)
Approvals & Certifications
- IEC 61643-21, EN 61643-21, UL 497B
- UP to SIL 3
Capacitance
- Capacitance Line-Line: ≤ 0.8 NF
- Capacitance Line-PG: ≤ 16 PF
Current
- C2 Nominal Discharge Current (8/20 µs) Per Line: 5 KA
- C2 Total Nominal Discharge Current (8/20 µs): 20 KA
- D1 Lightning Impulse Current (10/350 µs) Per Line: 1 KA
- D1 Total Lightning Impulse Current (10/350 µs): 4 KA
Enclosure, Body Material
- Polyamide
Environmental Protection
- IP20
Frequency
- Cut-Off Frequency Line-Line: 7.7 MHz
Input
- Maximum
Operating Temperature
- -40° to 80° C (-40° to 176° F)
Operating Voltages
- Maximum
Resistance
- Series Resistance Per Line: 1 ohm
Voltage
- Nominal Voltage: 24 V
- Voltage Protection Level Line-Line at 1 kV/µs C3 (Uₚ): ≤ 45 V
- Voltage Protection Level Line-Line for Iₙ C2 (Uₚ): ≤ 52 V
- Voltage Protection Level Line-Line for Iᵢₘₚ D1 (Uₚ): ≤ 50 V
- Voltage Protection Level Line-PG at 1 kV/µs C3 (Uₚ): ≤ 1,100 V
- Voltage Protection Level Line-PG for Iₙ C2 (Uₚ): ≤ 1,400 V
- Voltage Protection Level Line-PG for Iᵢₘₚ D1 (Uₚ): ≤ 1,300 V