|
|
|  DSH 507
9 ^9 q0 T* p5 v! o# c9 W3 H; n) P( c3 F
| Protection against electric shock& K1 s3 D* O- R- i( t3 A" i+ `
| 8.24 R' ~; [; ]$ S4 R
| 60335-1(ed.3)) U0 A4 q& J0 {; e8 @0 [2 z
|
% v1 z8 R, ~3 Y. E
Question:
9 _# V' J& r6 i. sIs basic insulation accessible through opening in earthed metal enclosure having paint3 w1 h" x; C# U' H) _& C/ e
coating acceptable?, k) ^4 W- C q/ I
Rationale:) K+ ~0 w, p N* }, b( N
See question.* f$ Z' i4 u. O9 F$ L' L
Decision:' i I6 y* U' W/ W3 R6 _
If the opening is such that the basic insulation is accessible without making contact at the
4 Q' m# I- @; O1 ~) Z3 T! ?same time with the earthed metal parts, it is considered as a class II construction and thus not
# u& B2 k; }! uacceptable.
& _' I1 R- V0 [If the basic insulation and the earthed metal parts are accessible at the same time, this is
9 R1 K& f- C/ i% ?7 x& O3 @, Nacceptable, as the earthing is one if the protection means.
% ]- D9 B2 J7 [+ [, X8 T5 S: F. L3 J
( v( F/ q! ~+ s' T' t3 j- n |
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发表于 2012-9-9 17:40
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