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|  DSH 402
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! b0 d) j$ Y1 g | General requirements6 S. N8 W1 p. W, J/ z* j
| 20, 20.1 A-a1)# M6 z6 n H5 b8 e8 Q+ c% M
| 60601-1(ed.2);am1;am2
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Standard(s)- (year and edition):/ {/ ^7 ?; O6 `8 \& @3 @8 Z
IEC 60601-1:1988 Ed.2 Am1+Am2
5 B* \) t+ ^$ L O1 g8 _9 r! @# q6 ], PSub clause(s): 20, 20.1 A-a1); _ |/ k2 |! F
Sheet n°: DSH-402
* r% a) ], o4 s1 H# ?Subject: General requirements
9 [) [7 S8 S, c! U" b; C! a* G! G$ vKey words: Basic insulation A-a1, intermediate circuit
$ u0 o& @3 x/ `1 n3 n8 AConfirmed by CTL at its 39th meeting, in Cologne* l: U& K/ d, u' W' @+ F& E+ Y
Question:5 u; _: s: A9 Q% E4 [5 Q$ ^; e; F
The requirements in 20.1 would appear to apply also to intermediate circuits which may or may& Z; }0 C# r$ f: [5 F) M+ G# O
not remain live after interruption of the protective earth conductor.7 I1 s- l4 z/ b L1 {- Y( c+ B
Should A-a1) be applied also in those case where the intermediate circuit ceases to be live after/ f; f) z9 l8 ^! s9 J2 T
interruption of the protective earth conductor?& |% ^7 Z' D( m+ B( u( }# w- {% i
Decision:# j& K) h3 C, n$ R
Requirements for Basic insulation A-a1) should be applied only to those intermediate circuits
3 v9 D' v& c- S, s9 D8 xwhich may be hazardous in single fault conditions.5 S2 |+ p! p( [+ }' ]3 r
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发表于 2012-11-5 11:48
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