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|  DSH 276; E8 I% y- D: z$ y0 s- V' q
( L% w6 S- K" q | Risk of corrosion resulting from contact between earthing terminal and the copper of earthing conduc ...& a1 P5 I5 U. |9 j6 Y
| 27.4$ Q1 i5 w; C, k( M! N
| 60335-1(ed.3)( o# V: h: H/ J" P9 K4 U
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8 k$ c R# y% A% z3 ?1 u/ pStandard: IEC 60335-1:Ed. 3.0 Sub clause: 27.4 Sheet n. 276
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Subject: Risk of corrosion resulting from contact between earthing terminal and the copper of earthing conductor
9 [' `8 x/ J0 c+ R' W. uKey words:
+ o, C7 |9 `$ L$ f- corrosion
6 Z( [+ x ?1 ^7 z6 i& J, o7 a- earthing
8 p( m9 \- s2 u! J! T- electrochemical potential- r# X4 {6 n u+ H! N& d" l: ~
Decision n. 20 taken at 36th meeting/19992 G3 w, b1 c) v( n/ I, G
Question: The checking of the risk of corrosion resulting from contact between earthing! ?' `. @; ~9 R( Z# k8 z- y! B
terminal and the copper of the earthing conductor or other metal parts is not always
6 C f2 T7 D# u4 q9 peasy to perform only by inspection, and some standards (e.g. IEC60950:1990, annex0 c2 z8 F7 R+ P2 \
J) make reference to the table of electrochemical potential./ n6 o+ X: X& m r" j8 j0 z
Does this table may be used , and what are the practises to check compliance to this# ?$ B- N$ s1 U
requirement ?
. t" b0 m5 Y7 o" c/ K: kDecision: Table of electrochemical potential may be used to verify compliance with
4 s1 r+ d& W( s1 K1 J. A) f4 _' |; Trequirement of 27.4.
s4 K: h: I7 e0 m' m; S8 r! K; D4 ?! lInformation given by the manufacturer may be also acceptable to verify compliance.
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发表于 2012-9-14 13:28
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