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Manual BVS 20 ATEX E 103 X / BVS 20 ATEX E 104 X
6.5
Recurring pressure half-value time test
6.5.1 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.
6.5.2 Switch and control gear combinations
without test port (only applies to poly-
ester 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.
7.
Disposal
When the explosionproof switchgear assemblies
are eventually disposed of, the national regula-
tions governing the disposal of waste materials
in the country concerned must be rigorously
observed.
Edition February 2021
Copyright
21
thuba Ltd., CH-4002 Basell
Switzerland
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