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Question:- G/ _) d) `& ?2 m4 K, O( m
Performing 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«.
# j0 _- W& z8 y; y" xSince 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:
' E4 }$ D; {0 h0 {0 S- Are the parts separated with protective impedance also energized?
0 c8 ]( ]+ p2 C2 G- Which are the insulation requirements for "Black Box"?6 D. h1 ]/ b, g! \9 P- U
Decision:" _ k* ^- N5 |, R
This construction is acceptable if only vapour is in contact with the people inside the cabinet.
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发表于 2012-9-8 20:22
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