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|
|  DSH 507) x5 ^- s$ U, a5 I
3 h. q6 ^9 x; u( f
| Protection against electric shock2 n9 T$ H; T: }0 r/ p+ E* ~# d5 X1 a
| 8.2* H: R6 ^) }) Q; S' t+ I
| 60335-1(ed.3)
: Y' B: ^% g9 Y: q9 b" R9 s |
/ k) h% D+ S$ W( s. K& p: XQuestion:* |6 a" v& O$ k
Is basic insulation accessible through opening in earthed metal enclosure having paint
# |: Y, [4 N! g/ Mcoating acceptable?9 x: @9 s* F" R1 B9 a) W4 n
Rationale:
. v; i% C8 f- \2 tSee question.
3 m: E! A5 n, t% w" Q; _$ E1 NDecision:
, w+ ?9 Y+ T1 J, v7 c" C GIf the opening is such that the basic insulation is accessible without making contact at the
6 N6 V% ]2 P" x/ l- Asame time with the earthed metal parts, it is considered as a class II construction and thus not$ f1 f" E/ e* ? ~4 F; Z
acceptable.
8 ?: H- }5 E B0 qIf the basic insulation and the earthed metal parts are accessible at the same time, this is
# [2 C& E& c9 J* r& E: dacceptable, as the earthing is one if the protection means.7 }; P. O9 s8 j- ], @
, c/ w4 n! J5 S& {5 ~" h# \+ J
1 \+ K, J2 d+ r, ^( w# {
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发表于 2012-9-9 17:40
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