Brochure/Catalogue

B
B.156 2028840000
Lightning and surge protection for control and instrumentation signals
VSSC 4 CL FG EX - protection for floating earth,
intrinsically safe current loops
UNPROTECTED PROTECTED
1
TS
2
3
4
Dielectric strength at FG against PE ≥ 500 V
Volume resistance 1.8
Ω 10 %
Overload - failure mode Modus 2
Requirements category acc. to IEC 61643-21 C2, C3, D1
Surge current-carrying capacity C1
Surge current-carrying capacity C2 2.5 kA 8/20 µs 5 kV 1.2/50 µs
Surge current-carrying capacity C3 50 A 10/1000 μs
Surge current-carrying capacity D1 0.5 kA 10/350 μs
Discharge current I
n
(8/20 µs) wire-wire/wire-PE/GND-PE 2.5 kA / 2.5 kA
Discharge I
max
(8/20 μs) wire-wire/wire-PE/GND-PE 5 kA / 5 kA
Lightning test I
imp
(10/350 µs) wire-wire/wire-PE/GND-PE / 0.5 kA
Type of connection Screw connection, Torx
®
T15, Slotted 0.8 x 4
Storage temperature -40 °C...80 °C
Ambient temperature (operational) -40 °C...70 °C
Protection degree IP20
UL 94 flammability rating V-0
Connection data
Type of connection Screw connection, Torx
®
T15, Slotted 0.8 x 4
Tightening torque 0.5 Nm
Wire connection cross section, finely stranded, max. 4 mm²
Wire connection cross-section, finely stranded, min. 0.5 mm²
Wire cross-section, solid, max. 6 mm²
Wire cross-section, solid, min. 0.5 mm²
Wire cross-section, stranded, max. 4 mm²
Wire cross-section, stranded, min. 0.5 mm²
Stripping length 10 mm
Mounting rail TS 35
Approvals
Approvals CE; CSAEX; DEKRAATEX; EAC; GOSTEX; IECEXDEK; TUEV
Standards IEC61643-21:2009, DIN EN 60079-0.2009, DIN EN 60079-
26:2007, DIN EN 61241-11:2006
ATEX - dust labelling II 1 D Ex ia IIIC T135 °C …T85 °C Da
ATEX - gas labelling II 1 G Ex ia IIC T4… T6 Ga
IECEx - dust labelling II 1 D Ex ia IIIC T135 °C …T85 °C Da
IECEx - gas labelling II 1 G Ex ia IIC T4… T6 Ga
Note
Dimensions Dimensions
Height x width x depth mm 76 / 12.2 / 58.5
ATEX approval: II 1 G EX ia IIC T4...T6 Ga II 1 D EX ia IIIC T135°C...T85°C
DEKRA No: 11ATEX0023 X
Technical data
• 2-level surge protection with screw connection for intrinsically safe
instrumentation and control signals
• Surge protection in terminal block design
• Width of only 12.4mm
• Torx
®
slotted screw connection
• Version with floating-earth PE connection used to avoid differences in
voltage potential
• Can be used in accordance with installation standard IEC 62305 as
well as in ATEX user standards
• Integrated PE foot, safely discharges up to 20kA (8/20 μs) and
2.5kA (10/350 μs) to PE
VARITECTOR SSC EX