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|  DSH 402+ }& Q8 ?& H( [& u6 y+ i
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| General requirements& t* z+ s1 B. x8 }* | Q
| 20, 20.1 A-a1)
0 H. X6 }. E! ]2 [1 \ | 60601-1(ed.2);am1;am2
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Standard(s)- (year and edition):8 R3 m- i8 a" d$ i% J4 X
IEC 60601-1:1988 Ed.2 Am1+Am2: S' B t2 C( {, ?* x- `
Sub clause(s): 20, 20.1 A-a1)4 b$ i, p) _3 h d5 d
Sheet n°: DSH-402) K; `" T! w6 d; H/ x
Subject: General requirements c' L8 t/ s4 V) o1 p4 v, Z% s3 t
Key words: Basic insulation A-a1, intermediate circuit' X s4 `2 {) s: G6 y# i
Confirmed by CTL at its 39th meeting, in Cologne: {) G4 R `$ t
Question:
; c3 u c7 U e U2 ?The requirements in 20.1 would appear to apply also to intermediate circuits which may or may
+ J6 v+ s/ Y0 z; x2 T/ S) Tnot remain live after interruption of the protective earth conductor.
2 B9 u" Z0 _# A T6 x7 vShould A-a1) be applied also in those case where the intermediate circuit ceases to be live after5 K j% D X Z, J/ D
interruption of the protective earth conductor?* m( A) @; X; g4 t& e2 w, b& f7 v
Decision:! M7 B# a' @% `9 Z9 `
Requirements for Basic insulation A-a1) should be applied only to those intermediate circuits
) D, i8 A" h3 I0 P& u; Awhich may be hazardous in single fault conditions.
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发表于 2012-11-5 11:48
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