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[HOUS] DSH 276 Risk of corrosion resulting from contact between earthing terminal and

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发表于 2012-9-14 13:28 | 显示全部楼层 |阅读模式
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DSH 276) W1 H* a) O- s4 z& G
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Risk of corrosion resulting from contact between earthing terminal and the copper of earthing conduc ...$ F0 x3 c+ ]7 o  v& E
27.4
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60335-1(ed.3)+ n# X( ^1 N/ C0 V: b& K. R

. n. }$ F# f/ V) BStandard: IEC 60335-1:Ed. 3.0 Sub clause: 27.4 Sheet n. 2764 }( {8 y+ E4 W; q4 ~$ y
Page 1(1)
2 {( \: e0 Q( ]/ X" ?) `( N0 nSubject: Risk of corrosion resulting from contact between earthing terminal and the copper of earthing conductor
0 S3 _% D* r- M2 u' @: x, @% nKey words:3 m  z5 \1 k# }1 a/ c
- corrosion
% @! z# ]; p. d1 q. h$ D- earthing) ]5 V+ a. t* V$ F+ v, w6 q' n. Y
- electrochemical potential
, B$ r1 F& U/ s6 a0 M% GDecision n. 20 taken at 36th meeting/1999
, M% k1 V! x  b# W! t- L6 g1 LQuestion: The checking of the risk of corrosion resulting from contact between earthing& D: U( A# Y  A8 S/ X+ Z
terminal and the copper of the earthing conductor or other metal parts is not always# f/ s/ C. z1 s, V0 O  O
easy to perform only by inspection, and some standards (e.g. IEC60950:1990, annex8 n! a. }" F# o
J) make reference to the table of electrochemical potential.7 i/ s+ Q0 C: e2 v0 C
Does this table may be used , and what are the practises to check compliance to this
8 k9 B" w, T/ ?7 lrequirement ?; \+ z$ V) _9 L5 `
Decision: Table of electrochemical potential may be used to verify compliance with* l# }, @* k0 y2 W# [$ o2 e( D+ v! U# ^
requirement of 27.4.
  ^1 ~2 C3 I! r( R; W+ b! d: eInformation given by the manufacturer may be also acceptable to verify compliance.
& c# {6 _0 a* t2 {# C
5 n2 Y; `6 g( N' j% r0 Z! e" y; X5 a; h1 L4 j0 r

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