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|  DSH 5075 I9 Y8 t! G4 a; A7 P2 f/ l7 w
% u6 D, q! m- C" b+ q& ^
| Protection against electric shock
/ t* x$ m `1 Q. L | 8.2, M$ u1 O) v, S7 T1 S* d: Q
| 60335-1(ed.3)
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" g% Q$ z+ r8 y- t( @ m* YQuestion: v* [" {. u. f2 V9 P
Is basic insulation accessible through opening in earthed metal enclosure having paint7 N' z: L+ V% U; I$ @% A* R
coating acceptable?
0 h2 I3 a# P/ a- c7 q9 G/ O4 O! N1 k" vRationale:
, f8 r* ]6 @! T3 s: \See question.6 A% R+ A- j& l) s" U. |" k+ U" ^6 i1 s1 o
Decision:9 t: }8 x5 q' ~' l
If the opening is such that the basic insulation is accessible without making contact at the
6 J- d+ B o( o, L4 J9 j0 A y+ lsame time with the earthed metal parts, it is considered as a class II construction and thus not2 }* L/ X% z0 @0 w ^, t- T) t
acceptable.
: c1 s- {5 q/ q4 XIf the basic insulation and the earthed metal parts are accessible at the same time, this is
# B9 W# `% w' X( B9 {- vacceptable, as the earthing is one if the protection means.
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发表于 2012-9-9 17:40
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