SPARK GAPS - DEHN (UK)

SPARK GAPS
DEHN (UK) LTD
DS179UK/08/10

DEHN - Isolating Spark Gaps
Process plants such as refineries, oil, gas and product pipelines belong to the largest and most sophisticated building
structures. They form the lifelines for regions and entire countries. Reliability, quality and efficiency are important
factors for the oil and gas industry to establish themselves on the market. Therefore safe operation of all electrical
and electronic installations and systems is the most important aspect.
Due to the large size, location and construction as well as the use of modern measuring and control technology, the
reliability of these installations is threatened by surges due to lightning or switching operations. The repair costs for
replacing damaged systems are considerably higher than the costs of installing lightning protection systems and
surge protective devices, not to mention the revenue lost due to operational downtime.
DEHN also offers practical protection against lightning and surges for the cathodic corrosion protection system.
Decades of .. experience in lightning and surge protection for petrochemical systems as well as intensive research by
DEHN + SOHNE have led to the development of comprehensive protection solutions. This allows a substantial
reduction of lightning damage e.g. at isolating pipe flanges, CP installations and control rooms. More importantly,
consequential production failures and operational downtime due to lightning are reduced to a minimum.
..
DEHN + SOHNE offers ATEX and IEC/Ex approved isolating spark gap products for use in EX Zones 1, 2, 21 and 22.
Latest certificates available to download on www.dehn.co.uk

EXFS 100 / EXFS 100 KU LIGHTNING EQUIPOTENTIAL BONDING
For explosion-hazard areas ISOLATING SPARK GAPS (Zones 1, 2, 21, 22)
ATEX-certified isolating spark gap for lightning
equipotential bonding according to IEC 62305 with
low sparkover voltage.
EXFS 100: Isolating spark gap for use in explosion-hazard areas with plastic coating and M10 connecting nut.
EXFS 100 KU: Isolating spark gap for use in explosion-hazard areas with 2m connection cable for above / underground installation.
The Ex isolating spark gaps of the EXFS 100 / EXFS 100 KU product family are used
when conductive installation components situated in explosion-hazard areas
cannot be connected directly with each other. The spark gaps with low
sparkover voltage are especially efficient for isolated installation components
with little insulation resistance. No special regulations have to be observed for
safe application in zone 1 with gases or zone 21 with dusts. With a maximum
lightning impulse current of 100 kA (10/350 us), EXFS 100 and EXFS 100 KU meet
class H according to EN 50164-3 “Lightning Protection Components (LPC) - Part 3:
Requirements for isolating spark gaps”. The ATEX-certified spark gaps EXFS 100
and EXFS 100 KU provide approved safety according to harmonised European
standards. For connecting EXFS 100 spark gaps, prewired connecting cables with
different lengths are available as accessories. Flat and angled connection
brackets make it easier to connect the spark gaps to pipe flanges. EXFS 100 KU
types are enclosed by a damp-proof plastic coating and are ideally suited for
underground installation at insulation couplings.
EXFS 100 EXFS 100 KU
Lightning impulse current (10/350 us) Iimp 100 kA 100 kA
Class of lightning current carrying capability acc. to EN
50164-3
H H
Nominal discharge current (8/20 us) In 100 kA 100 kA
Rated power-frequency withstand voltage (50 Hz) Uw/
ac
250 V 250 V
100% Lightning impulse sparkover voltage Urimp ≤1.25 kV ≤1.25 kV
Power-frequency sparkover voltage (50 Hz) Uaw ≤0.5 kV ≤0.5 kV
Rated discharge current (50 Hz) Imax 500 A/0.5 sec. (Tu: 45 C) 500 A/0.5 sec. (Tu 45 C)
(Ex) marking acc. To EN 60079 (gases) II 2G Ex d IIC T6 II 2G ExdIIC T6
(Ex) marking acc. To EN 61241 (dusts) II 2D Ex tD A21 lP67 T 80 C II 2D Ex tD A21 lP67 T 80 C
Operating temperature range Tu -20 C…+60 C -20 C…+60 C
Degree of protection IP 67 IP 67
Approvals, Certifications BVS 06 ATEX E 099, IECEx KEM
09.0051...
BVS 06 ATEX E 099, IECEx KEM
09.0051...
Length of enclosure 100 mm 123 mm
Diameter of enclosure 45.5 mm 34 mm
Enclosure material Plastic coating Plastic coating; water-proof coating
Connection of enclosure Thread nut M10, 2x M10x25 mm,
2 x spring washer
NYY-J-1 x 25 mm ,
approx. 2 m long
Type EXFS 100 EXFS 100 KU
Part No. 923 100 923 101
Packing unit 1 pc(s) 1 pc(s)
For indirect connection/earthing of functionally isolated installation components when
being affected by lightning.
Device for lightning equipotential bonding according to IEC 62305 in explosion-hazard
areas (1, 2, 21, 22).
For bridging insulation pieces, insulation flanges etc. in cathodically corrosion-protected
pipe sections.
For safe installation in explosion protected zone 1, 2, 21, 22 (Gas, Dust according to ATEX
Directives)
Particularly low sparkover voltage.
Especially high a.c. current withstand capability. 100 kA (according to EN 50164-3)
Extremely heavy duty device IP 67.
Installation of EXFS 100 EXFS 100 Installation of EXFS 100 KU
EXFS 100 KU
o
o
o
o
2
o
o
Accessory Parts for EXFS 100 / EXFS 100 KU
EXFS 100: Connection cable, Cu 25 mm
Connecting cable for EXFS 100;2 cable lugs 010.5
mm hexagon screw and nut (M10), StSt spring &
washer
Type Cable lug
material
Cross
section
Cable
length
Pair of angled connection brackets - IF 1 -
Pair of angled connection brackets for EXFS ..;
diameter corresponds to bolt diameter of the
bolted flange joint (d1 up to max. 60mm, please
indicate the diameter required when placing your
order)
Pair of flat connection brackets - IF 3 -
Pair of flat connection brackets for EXFS ..;
diameter corresponds to bolt diameter of the
bolted flange joint (d1 up to max. 60mm, please
indicate the diameter required when placing your
order)
2
Pu
pc(s)
Part No
2
AL EXFS L100 KS Cu/gal Sn 25mm 100mm 1 *923 025
2
AL EXFS L200 KS Cu/gal Sn 25mm 200mm 1 *923 035
2
AL EXFS L300 KS Cu/gal Sn 25mm 300mm 1 *923 045
Type Material Pu pc(s). Part No.
IF1 St/t/Zn 1
*923 011
Type Material Pu pc(s). Part No.
IF3 St/t/Zn 1
*923 016
*None sparking approved accessories eliminate the possibility of
sparking in explosion-hazard areas

EXFS L / EXFS KU LIGHTNING EQUIPOTENTIAL BONDING
For use in explosion-hazard areas ISOLATING SPARK GAPS (Zones 2)
ATEX-certified isolating spark gap for lightning equipotential
bonding according to IEC 62305, approved device with flexible
conductor connection.
EXFS L..: Isolating spark gap for use in explosion-hazard areas with flexible connecting cable
EXFS KU: Isolating spark gap for use in explosion-hazard areas with 1.5m connecting cable for above/underground installation
Installation of EXFS L... EXFS L... EXFS KU
EXFS L100,200,300 EXFS KU
Lightning impulse current (10/350 us) Iimp 50 kA 50 kA
Class of lightning current carrying capability acc. to EN
50164-3
N N
Nominal discharge current (8/20 us) Iin 100 kA 100 kA
Rated power-frequency withstand voltage (50 Hz) Uw/
ac
300 V 300 V
100% Lightning impulse sparkover voltage Urimp ≤2.5 kV ≤2.5 kV
Power-frequency sparkover voltage (50 Hz) Uaw ≤1.2 kV ≤1.2 kV
Type of protection acc. EN 50014, EN 50021 II 3 G EEx nC II T4 II 3 G EEx nC II T4
Operating temperature range Tu -20 C…+80 C -20 C…+80 C
Degree of protection IP 54 IP 67
Approvals, Certifications ZELM 03 ATEX 3192X ZELM 03 ATEX 3192X
Length of enclosure 90 mm 90 mm
Diameter of enclosure 63 mm 63 mm
Enclosure material Zinc diecasting, plastic Zinc diecasting, plastic
Connection cable
2
H01N2-D 25mm with cable lug and
screw/nut (M10)
2
NYY-J-1x25 mm
Cable length* 100, 200, 300 mm * 2 x approx. 1500mm
Suitable for flange size 20-130, 120-230, 220-320 mm
Type EXFS L100, 200, 300 EXFS KU
Part No. 923 060, 923 061, 923 062 923 019
Packing unit 1 pc(s) 1 pc(s)
*Cable length for EXFS L100 - 100mm, L200 - 200mm, L300 - 300mm. Custom lengths also available.
For indirect connection/earthing of functionally isolated installation
components when being affected by lightning.
Device for lightning equipotential bonding acc. to IEC 62305 in
explosion-hazard areas (Zone 2).
According to “ATEX Directive” 94/9/EC.
Corrosion-resistant zinc diecasting enclosure with plastic cover and
flexible conductor connection.
For bridging insulating pieces, insulation flanges etc. in cathodically
corrosion protected pipe sections.
Heavy-duty device.
Ex isolating spark gaps of the EXFS L / EXFS KU product family are used when the direct interconnection of electrically conductive
installation components in Ex areas is not acceptable. As, for example, in the case of cathodically corrosion protected pipeline sections.
ATEX-certified EXFS L and EXFS KU spark gaps provide approved and tested 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 type EXFS L with flexible
conductor connection quickly adapts to any application environment. The prewired spark gaps provide connecting cables with different
lengths with cable lugs, screws and M10 nut. The flat or angled connection brackets allow for easy connection of the spark gap to
pipeline flanges. The EXFS KU type is enclosed in a damp-proof PVC enclosure and is ideal for underground installation at insulating
couplings.
o
o
Accessory Parts for EXFS L / EXFS KU
Pair of angled connection brackets - IF 1 -
Pair of angled connection brackets for EXFS …;
diameter corresponds to bolt diameter of the
bolted flange joint (d1 up to max. 60 mm, please
indicate the diameter required when placing your
order)
Type Material Pu pc(s). Part No.
IF1 St/t/Zn 1
*923 011
Pair of flat connection brackets - IF 3 -
Pair of flat connection brackets for EXFS ..; diameter
corresponds to bolt diameter of the bolted
flange joint (d1 up to max. 60mm, please indicate
the diameter required when placing your order)
Type Material Pu pc(s). Part No.
IF3 St/t/Zn 1
*923 016
*None sparking approved accessories eliminate the possibility of
sparking in explosion-hazard areas

1
2
3
LIGHTNING AND SURGE PROTECTION FOR PIPELINE STATIONS
DEHNventil M TNC 255 (FM)
951 300 (305)
DEHNventil M TNS 255 (FM)
951 400 (405)
DEHNventil M TT 255 (FM)
951 310 (315)
Multipole modular lightning current
and surge arrester for protection of
the power supply in low voltage
distribution systems
BLITZDUCTOR BXT ML4 BD 180 + BXT BAS.
920 347 + 920 300
Universal, pluggable lightning current and
surge arrester for telecommunication and
telecontrol systems with integrated LifeCheck
BLITZDUCTOR BXT ML4 BD EX 24 + BXT BAS
EX. 920 381 + 920 301
Universal, pluggable surge arrester for 2
isolated intrinsically safe measuring circuits
with integrated LifeCheck
EXFS 100. 923 100
ATEX certified spark gap for use
in hazardous areas (Zone 1, 2, 21,
22) for protection against over
voltages and lightning currents
DEHNpipe DPI MD EX 24 M 2.
929 960
Surge arrester for protection of
intrinsically safe measuring
circuits made of stainless steel for
outdoor areas (IP 67) for screwing
into 2-wire filed devices
Pipe clamps for hazardous areas.
e.g. 540 803
Pipe clamp for connecting pipes of
different materials and diameters which
allows for discharging lightning currents
in hazardous areas (Zone 1, 2, 21, 22)
without ignition sparks
Schematic diagram: Lightning and Surge protection for a pipeline station
For more information refer to www.dehn.co.uk or the DEHN UK main catalogue
4
5
6

1 BLITZDUCTOR VT KKS BVT KKS ALD 75.
918 420
Lightning current and surge arrester
for protection of active corrosion
protection installations (anode
electrical circuit) with integrated
remote signalling contact. Installation
in steel plate enclosure recommended
2
DEHN PROTECTS CATHODIC PROTECTION (CP) SYSTEMS
3 ITAK KKS. 989 406/S;
4 EXFS L 100. 923 060
4
Aluminium connection box,
ATEX certified spark gap
IP 65, for protection of CP
for use in hazardous
installations, completely
areas (Zone 2) for
equipped with lightning
protection against over
current and surge arrester
voltages and lightning
type BVT KKS ALD 75 + BVT
KKS APD 36
currents
BLITZDUCTOR VT KKS BVT KKS APD 36.
918 421
Lightning current and surge arrester for
protection of active corrosion protection
installations (sensor measuring circuit) with
integrated remote signalling contact.
Installation into steel plate enclosure
recommended
EXFS 100. 923 100
ATEX certified spark gap for
use in hazardous areas (Zone
1, 2, 21, 22) for protection
against over voltages and
lightning currents
Each cable going out of the CP rectifier (measuring and anode electrical circuit) is led via a lightning current and surge
arrester especially adjusted to CP installations. Thus, the partial lightning currents coming from the pipeline as well as
surges caused by switching operations can be controlled safely. It is recommended to install the lightning current and
surge arresters into a separate steel enclosure in order to prevent any threats to the CP installation due to overloads
e.g. via overhead lines.
Schematic diagram: Lightning and Surge protection for CP systems
For more information refer to www.dehn.co.uk or the DEHN UK main catalogue

Notes

Lightning Protection
Surge Protection
Safety Protection
DEHN (UK) LTD
Unit N8B Meltham Mills
Meltham
Holmfirth
West Yorkshire
HD9 4DS
Tel: 01484 859111
Fax: 01484 859222
Email: info@dehn.co.uk
Web: www.dehn.co.uk