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Manual Access Point «SAnR/SAtb»
6.3
Spare parts
Only genuine spare parts from the manufacturer
may be installed. Make sure that the compo-
nents and parts are suitable for each application
(device category 3G/2D or device protection lev-
el Gc/Db). The appropriate temperature range
based on the environmental temperature must
also be considered when selecting the spare
parts. When in doubt, please contact the manu-
facturer.
6.4
Switch and control gear combinations
without test port (only applies to
polyester enclosures)
In the case of explosionproof control gear com -
binations (with components that do not give off
arcs or sparks) without a test port, the routine
test was carried out with a pressure half-value
time of 180 seconds. Further testing on site is
not required.
If the explosionproof control gear combinations
have to be opened for maintenance or repairs
contrary to the above conditions, an additional
pressure half-life test must be carried out.
The enclosure is tested with an overpressure of
0.3 kPa (3 mbar). The length of time needed to
reach half the pressure 0.15 kPa (1,5 mbar) shall
be at least 180 seconds .
In order to be able to carry out a pressure half-
life test, the enclosures are equipped with a
blanking element in addition to the cable entry.
Warning – Do not open, maintain or service
in an area when an explosive atmosphere is
present.
Edition April 2021
Copyright
13
thuba Ltd., CH-4002 Basel
Switzerland
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