EXFS L / EXFS KU

For Use in Hazardous Areas

ATEX and IECEx-certified isolating spark gap for lightning equipotential bonding according to IEC 62305 with flexible cable connection.
  • For indirect connection / earthing of functionally isolated parts of installations under lightning conditions
  • For lightning equipotential bonding according to IEC 62305 in hazardous areas (zone 2)
  • Corrosion-resistant zinc die-cast enclosure with plastic cover and flexible cable connection
  • For bridging insulating joints, insulating flanges etc. in cathodically protected pipe sections
  • Extremely heavy-duty device
  • Approval according to ATEX directive 94/9/EC and IECEx

Version

EXFS L ...: Isolating spark gap for use in hazardous areas with flexible connecting cable
EXFS KU: Isolating spark gap for use in hazardous areas with two 1.5 m long connecting cables for underground installation

Details

Ex isolating spark gaps of the EXFS L / EXFS KU product line are used when electrically conductive parts of installations cannot be directly interconnected in hazardous areas, for example, in case of cathodically protected pipeline sections.
ATEX and IECEx-certified EXFS L and EXFS KU spark gaps provide approved safety in accordance with harmonised European standards.
The arc-resistant tungsten / copper electrodes ensure a long service life of the Ex spark gaps.
The approved EXFS L type with flexible cable connection quickly adapts to any application environment. The prewired spark gaps feature connecting cables of different lengths with cable lug, screw and M10 nut. The flat or angled connection brackets (IF), which are available as accessory, allow to easily connect the spark gap to pipeline flanges.
The EXFS KU type is enclosed by a water-proof PVC sheath and is thus ideally suited for underground installation on insulating couplings.

Models

EXFS L

EXFS KU

EXFS L

Installation of EXFS L
Dimension drawing EXFS L

Ex isolating spark gap for aboveground installation.

Specifications

Type
Part No.
Isolating spark gap according to EN 62561-3 / IEC 62561-3
Lightning impulse current (10/350 µs) (Iimp)
Class (lightning current carrying capability)
Rated power-frequency withstand voltage (50 Hz) (UwAC)
Rated impulse sparkover voltage (Ur imp)
Operating temperature range (TU)
Ambient temperature range when used in hazardous areas
Degree of protection
ATEX approvals
Ex marking according to EN 60079-0 and EN 60079-15: gas
IECEx approvals
Ex marking according to EN 60079-0
Enclosure length
Enclosure diameter
Enclosure material
Connecting cable
Cable length
Suitable for flange size
Extended technical data:
– Nominal discharge current (8/20 µs) (In)
– Power frequency sparkover voltage (50 Hz) (Uaw)
Weight
GTIN
PU
Part No.
  • EXFS L100
  • 923 060
  • yes
  • 50 kA
  • N
  • 300 V
  • ≤ 2.5 kV
  • -20 °C ... +80 °C
  • -20 °C ... +60 °C
  • IP 54
  • DEKRA 11ATEX0146 X
  • II 3 G Ex nC IIC T4 Gc
  • IECEx DEK 11.0063X
  • Ex nC IIC T4 Gc
  • 90 mm
  • 63 mm
  • zinc die-cast, plastic
  • H01N2-D 25 mm2 with cable lug and screw / nut (M10)
  • 100 mm
  • 20-130 mm
  • --------------------
  • 100 kA
  • ≤ 1.2 kV
  • 725 g
  • 4013364038899
  • 1 pc(s)
  • 923 060
  • Specifications (PDF)
  • More
  • EXFS L200
  • 923 061
  • yes
  • 50 kA
  • N
  • 300 V
  • ≤ 2.5 kV
  • -20 °C ... +80 °C
  • -20 °C ... +60 °C
  • IP 54
  • DEKRA 11ATEX0146 X
  • II 3 G Ex nC IIC T4 Gc
  • IECEx DEK 11.0063X
  • Ex nC IIC T4 Gc
  • 90 mm
  • 63 mm
  • zinc die-cast, plastic
  • H01N2-D 25 mm2 with cable lug and screw / nut (M10)
  • 200 mm
  • 120-230 mm
  • --------------------
  • 100 kA
  • ≤ 1.2 kV
  • 750 g
  • 4013364038905
  • 1 pc(s)
  • 923 061
  • Specifications (PDF)
  • More
  • EXFS L300
  • 923 062
  • yes
  • 50 kA
  • N
  • 300 V
  • ≤ 2.5 kV
  • -20 °C ... +80 °C
  • -20 °C ... +60 °C
  • IP 54
  • DEKRA 11ATEX0146 X
  • II 3 G Ex nC IIC T4 Gc
  • IECEx DEK 11.0063X
  • Ex nC IIC T4 Gc
  • 90 mm
  • 63 mm
  • zinc die-cast, plastic
  • H01N2-D 25 mm2 with cable lug and screw / nut (M10)
  • 300 mm
  • 220-320 mm
  • --------------------
  • 100 kA
  • ≤ 1.2 kV
  • 733 g
  • 4013364038912
  • 1 pc(s)
  • 923 062
  • Specifications (PDF)
  • More

EXFS KU

Dimension drawing EXFS KU

Ex isolating spark gap with connecting cables for aboveground and underground installation; with water-proof sheath; can be shortened for short cable lengths.

Specifications

Type
Part No.
Isolating spark gap according to EN 62561-3 / IEC 62561-3
Lightning impulse current (10/350 µs) (Iimp)
Class (lightning current carrying capability)
Rated power-frequency withstand voltage (50 Hz) (UwAC)
Rated impulse sparkover voltage (Ur imp)
Operating temperature range (TU)
Ambient temperature range when used in hazardous areas
Degree of protection
ATEX approvals
Ex marking according to EN 60079-0 and EN 60079-15: gas
IECEx approvals
Ex marking according to EN 60079-0
Enclosure length
Enclosure diameter
Enclosure material
Connecting cable
Cable length
Extended technical data:
– Nominal discharge current (8/20 µs) (In)
– Power frequency sparkover voltage (50 Hz) (Uaw)
Weight
GTIN
PU
Part No.
  • EXFS KU
  • 923 019
  • yes
  • 50 kA
  • N
  • 300 V
  • ≤ 2.5 kV
  • -20 °C ... +80 °C
  • -20 °C ... +60 °C
  • IP 67
  • DEKRA 11ATEX0146 X
  • II 3 G Ex nC IIC T4 Gc
  • IECEx DEK 11.0063X
  • Ex nC IIC T4 Gc
  • 90 mm
  • 63 mm
  • zinc die-cast, plastic
  • NYY-J-1x25 mm2
  • 2x approx. 1500 mm
  • --------------------
  • 100 kA
  • ≤ 1.2 kV
  • 1,7 kg
  • 4013364033177
  • 1 pc(s)
  • 923 019
  • Specifications (PDF)
  • More
    • Further Pictures
      Dimension drawing EXFS KU
      open PDF
      Further Information
      Product Specifications (Text)

      Back

      Ex isolating spark gap of type  EXFS KU
Ex isolating spark gap of type EXFS KU for hazardous areas (zone 2)
with connecting cables for aboveground and underground installation
ATEX-certified (94/9/EC)
For lightning equipotential bonding according to IEC 62305-4
Lightning impulse current (10/350):  50 kA
Class of lightning current carrying capability acc. to EN 50164-3: N
Nominal discharge current (8/20): 100 kA
100% lightning impulse sparkover voltage: <= 2.5 kV
Power frequency sparkover voltage (50Hz): <= 1.2 kV
Cable length: 		2x approx. 1500 mm

      delivery and installation.

      Brand: DEHN
      Type: EXFS KU
      Part No.: 923 019

      or equivalent.
      Installation Instructions
      Certificates
      DEKRA 11ATEX0146 X
      IECEx DEK 11.0063X
      CE_EXFS_KU
      CAD-Data for registered Users
      923019.stp
      923019.igs
      923019.jt
      923019.dwg
      923019m_E.dxf

Accessories

Angled Connection Brackets – IF 1 –

Angled connection bracket for EXFS ...; diameter corresponds to the bolt diameter of the flange joint; material: St/tZn.

Show SpecificationsHide Specifications

Specifications

Type
Part No.
Design
Material
Borehole diameter d1
Weight
GTIN
PU

Flat Connection Brackets – IF 3 –

Flat connection bracket for EXFS ...; diameter corresponds to the bolt diameter of the flange joint; material: St/tZn.

Show SpecificationsHide Specifications

Specifications

Type
Part No.
Design
Material
Borehole diameter d1
Weight
GTIN
PU