The Restricted Breathing test is a simple test to ensure the enclosure seal is tight to prevent the gas entering the enclosure. The testing procedure and acceptance criteria is available in IEC 60079-15 standard, which explain how to do the restricted breathing seal test.
Enclosures certified as Ex-nR are subjected to this test.
this test shall be carried out after :
Installation,
Lamp Change.,
During Schedule Maintenance.,
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