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FLOWSIC100 Flare · Operating Instructions · 8013344/11L2/V 2-5/2018-10 · © SICK Engineering GmbH
Assembly and Installation
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3.8.3
Requirements for installation in the Ex zone
General requirements
General
●
The documentation for zone classification according to EN/IEC 60079-10 must be
available.
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The devices to be used must be checked for suitability for the application area.
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After installation, an initial test of the device and the plant according to EN/IEC 60079-
17 must be performed.
Cabling
●
The cables must fulfill the requirements according to EN/IEC 60079-14.
●
Cables which are especially endangered by thermal, mechanical or chemical stress,
must be protected, e.g. by laying in protective tubes.
●
Cables must be flame retardant in accordance with DIN VDE 0472 Part 804 Type of
Inspection B / IEC 60332-1 must be demonstrated.
●
The cross-section of each individual wire must not be smaller than 0.5 mm
²
.
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Observe the clamping range of the cable glands for cable selection.
●
Cables for Ex-e cable glands must comply with the requirements in EN 60079-14
Section 11.3.
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The existing clearance in air and creepage according to EN/IEC 60079-07 or EN/IEC
60079-15 may not be reduced by connection of the cables in the terminal compart-
ments.
●
Ex-d cable gland must be suitable for the intended cable type (e.g. cables with or without
armoring).
●
The cables and conductors for Ex-d cable terminals must comply with the requirements
in EN/IEC 60079-14, Section 10.4.2 b). The selection there must be made according to
Fig. 1.
– If the explosive gas mixture requires an IIC installation and the installation area belongs
to zone 1, pressure-proof cable glands and bushings containing seals filled with potting
compound must be used for the individual wires, e.g. series 8163/1-PXSS2K for normal,
not armored offshore and onshore cables or series 8163/1-PX2K for various armored
offshore and onshore cables, both from R.STAHL GmbH. Potting is done on-site. Observe
the manufacturer's description.
– If the explosive gas mixture requires only an IIB or IIA installation or the installation area
belongs to zone 2, suitable pressure-proof cable glands and bushings with a sealing ring
can also be used, if the cable is suitable for that.
●
Protect the wire ends with connector sleeves against fraying.
●
Replace unused cable glands with the enclosed Exe or Ex-d sealing plugs.
●
Connect or safeguard unused wires to ground so that a short circuit is excluded with
other conductive parts.
WARNING:
Explosion Hazard
Do not open the enclosures while energized.
Do not connect or disconnect the circuits unless power has been removed
or the area is known to be non-hazardous.
When using alternative connection of devices not belonging to the system
(especially external power supply devices, power supply units, etc.), ensure
that the maximum voltage at the connections does not exceed 125 V even
if a fault occurs, and that every single cable core is protected separately
with a fuse of max. 1 A.
Do not use the device if cables or terminals are damaged.