Betriebsanleitung / Operating manual
Leitungsdurchführungen / line bushings
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Version 06/2018 Seite/page 25/30
Start-up:
Every electrical device operated in hazardous areas must be selected according to the
conditions for each individual type of installation.
Operation of equipment is only allowed if undamaged and in a clean condition.
Before start up and at regular intervals the electrical equipment must be checked and
inspected by suitably qualified & trained staff.
Special conditions for safe use:
Line bushings with screw thread:
The thread hole of the flameproof enclosure in which the line bushing is integrated has to
comply with EN 60079-1:2014, Clause 5.3.
Pluggable line bushings:
The hole of the flameproof enclosure, in which the line bushing is integrated has to comply
with EN 60079-1:2014, Clauses 5.2.1 and 5.2.2 regarding the length and width of the gap.
The average surface finish (ISO 468) has to be R
a
≤ 6.3µm.
Requirements valid for pluggable and screwable line bushings:
The line bushing with shock protection (U and Z in the type designation key) may be used
for direct connection of flameproof enclosures. In this case, the mounting has to be from
the outside into the d-space, so that the impact proof is guaranteed. On the outside, only a
hose line, which is safely enclosed, may be used.
Regardless of the type of mounting it has to be ensured, that the line bushing is secured
against twisting or loosening.
The cable specific minimum ambient temperature T
A,min
is marked on the line bushings and
it is detailed in the shipping documents.
The specifically correct maximum ambient temperature T
A,max
is determined as described
in ATEX certificate no. 15.
For Ex-e and Ex-t applications the line bushings and plugs can be fitted with an O-Ring or
flange gasket. When correctly installed an IP protection of IP66 can be achieved. The
operating temperature range of the seal is -55°C to +70°C. For use with flange gasket it
must be assured that the gasket does not flip off due to high torque.
