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|  DSH 4027 [) Z) D1 X5 L& x: @; ^, @; H
9 j0 Z4 r3 E* o, O! P | General requirements
' Y3 v5 T3 G. m6 x# m8 D | 20, 20.1 A-a1)
3 N1 Q. H- A7 \' q" E. L | 60601-1(ed.2);am1;am20 n% y" {# f" j6 R; L" p
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1 R9 M1 W- A( q- ]; X% eStandard(s)- (year and edition):
$ m' V* v0 o. @ i- }4 Y1 rIEC 60601-1:1988 Ed.2 Am1+Am2. Z u' { g6 ?& I5 \/ p3 L4 t
Sub clause(s): 20, 20.1 A-a1)
; q' v+ A6 u0 VSheet n°: DSH-402
7 T5 T* m! l) g* qSubject: General requirements
# @: i+ i0 R) \) xKey words: Basic insulation A-a1, intermediate circuit
3 ?& @; h' j ^Confirmed by CTL at its 39th meeting, in Cologne( X# I/ \7 K! ] ]9 G& D3 T
Question:
) k6 m# H+ S0 _The requirements in 20.1 would appear to apply also to intermediate circuits which may or may4 D5 Y. f) Q* k5 }/ p
not remain live after interruption of the protective earth conductor.
4 g# h/ A+ n$ TShould A-a1) be applied also in those case where the intermediate circuit ceases to be live after% G3 ~+ D X9 Z' B) t$ e3 a1 Y
interruption of the protective earth conductor?0 W- X; i1 a& _' u! \
Decision:
3 ]9 @2 e! Y! S% w# BRequirements for Basic insulation A-a1) should be applied only to those intermediate circuits0 n( ~1 j' ~1 \5 u; i3 r" \' g- P
which may be hazardous in single fault conditions.0 z' h# h- q/ q! y% B6 w
0 E% ?2 p& e- ]! `' A
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发表于 2012-11-5 11:48
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