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Question:
! }, {! g6 W8 k% l ^4 k3 S9 p7 BPerforming the a test on multifunction shower cabinet with a vaporiser according to IEC 60335-2-105 requirements, level sensor of the vaporiser is in a direct contact with water as well as earthed metal enclosure of a vaporiser. According to the requirement of-sub-clause 22.33 conductive liquids which are accessible in normal-use shall not be in direct contact with live parts. Any energized part is considered to be a live part regardless of the voltage. Level sensor is connected to SELV parts over »Black Box«.
8 d1 s3 F" T$ z ?& l& rSince the is some doubts that the actual requirement of the sub-clause 22.33 spatially wording "not be in direct contact with live parts including SELV parts" and "energized" in our case over "Black Box" is fulfilled:8 x8 p8 z) M J( s+ z' |
- Are the parts separated with protective impedance also energized?
: O) k9 Z" `6 q0 J4 |- Which are the insulation requirements for "Black Box"?- q" E% ^' u! }
Decision:
$ N( e) R) {, f# U3 R2 \This construction is acceptable if only vapour is in contact with the people inside the cabinet./ K! X' q n5 ]* W3 Z( Y1 a
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发表于 2012-9-8 20:22
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