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Manual Access Point SAnR/SAtc
4.5
Closing enclosure
The cover screws shall be tightened with a
torque of 2.5 Nm to ensure the necessary tight-
ness.
5.
Initial test
5.1
Enclosure without test connection
n 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.
6.
Testing and Maintenance
The provisions of IEC 60079-17 'Inspection
and maintenance of electrical installations in
hazardous areas' relating to inspection, ser-
vicing and maintenance must be complied
with. In the course of maintenance work,
those components on which the type of
explosion protection is dependent must be
inspected particularly carefully.
Edition June 2021
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thuba Ltd., CH-4002 Basel
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