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[HOUS] DSH 577 Construction

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发表于 2012-9-8 20:22 | 显示全部楼层 |阅读模式
广东安规检测
有限公司提供:
DSH 577) Q7 }" g% j+ W! k$ I7 u+ D- A

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Construction' g$ L4 ?3 S) p" I% ^& S: @
22.33% B6 F% t& V8 C' M/ Y
60335-2-105(ed.1)
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' P# P2 D3 X3 `7 CQuestion:
9 g2 f* _" `' Y+ A% PPerforming 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«.
" h8 L6 |# L9 r. R2 b+ sSince 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:
" J  H$ h* N2 q* U) Z6 N) N- Are the parts separated with protective impedance also energized?
  Z# L/ r* N2 `- Which are the insulation requirements for "Black Box"?: p8 A5 N4 Z" R& u
Decision:
* G7 n4 x* g/ d, OThis construction is acceptable if only vapour is in contact with the people inside the cabinet./ }0 v5 v$ _% ]' e% |) t6 H

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