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Manual BVS 20 ATEX E 103 X / BVS 20 ATEX E 104 X
5.
Initial test
5.1
Switch and control gear combinations
with test port
After installation, a pressure half-value time test
shall be carried out on the explosionproof power,
switch and control gear distributions. The enclo-
sure 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 90 seconds.
5.2
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.
Warning – Do not open, maintain or service
in an area when an explosive atmosphere is
present.
6.
Servicing 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 inspections and main-
tenance work, those components on which
the type of explosion protection is dependent
must be inspected particularly carefully.
6.1
Qualifications
The inspection, servicing and maintenance of
the equipment may only be carried out by expe-
rienced personnel who during their training have
also been instructed in the various types of
explosion protection, installation processes, the
relevant rules and regulations and the general
Edition February 2021
Copyright
17
thuba Ltd., CH-4002 Basell
Switzerland
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