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|  DSH 5078 n& D9 c7 ?8 k/ ~3 y# r
5 t, c0 Q9 p( Q | Protection against electric shock3 ]$ T4 M6 O) n% s6 C
| 8.2
4 Z5 Y9 s3 Q7 b | 60335-1(ed.3)
1 v; V$ c( J$ j2 t% { |
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Question:
2 A% K7 u& x& n7 y9 f8 P/ mIs basic insulation accessible through opening in earthed metal enclosure having paint
4 h4 P( @. U: G3 i. x& acoating acceptable?" o1 q: s7 B: j( N. |
Rationale:
: t, J; ?' [0 j+ S; D1 l" r2 `( @See question.. ~8 D2 N, p4 B) F
Decision:. P2 s! m5 ]4 h; H3 \+ v
If the opening is such that the basic insulation is accessible without making contact at the7 Y, J' g. T8 c9 v: a/ k4 }
same time with the earthed metal parts, it is considered as a class II construction and thus not
6 c; f; b6 q1 u% k \acceptable.* q! p" B5 ]8 }. @- B
If the basic insulation and the earthed metal parts are accessible at the same time, this is
3 |4 E9 o2 c& D& ^( s# @acceptable, as the earthing is one if the protection means.9 l) ]4 q" H/ S- Y# R2 F1 a- f( b
% I; O+ Y5 O. p5 k4 i4 B) l
1 W7 h5 J* e4 ^1 |9 N
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发表于 2012-9-9 17:40
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