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|  DSH 4029 s7 P' E, q, x% Z) h
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| General requirements
0 s0 C( C# B# O9 c6 u. S; q) g, F | 20, 20.1 A-a1)
" @# M f. ~" k; E0 \ | 60601-1(ed.2);am1;am2
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Standard(s)- (year and edition):. i9 @6 R# j2 S/ q- f
IEC 60601-1:1988 Ed.2 Am1+Am2
' U0 U1 {% H3 U) VSub clause(s): 20, 20.1 A-a1)
$ e3 r* H: X& {Sheet n°: DSH-402; w# e# `9 C5 u9 J( w( g/ r
Subject: General requirements& R; Q* v! j0 M
Key words: Basic insulation A-a1, intermediate circuit
4 W ^. [0 i7 h1 d% ?* ?Confirmed by CTL at its 39th meeting, in Cologne
: U3 \ m& j1 k9 ]7 AQuestion:0 }, y4 i) y0 p
The requirements in 20.1 would appear to apply also to intermediate circuits which may or may
5 ]8 o! Z: D& k* P3 j: mnot remain live after interruption of the protective earth conductor.
/ ~4 P1 m& |/ \$ m/ S0 W, vShould A-a1) be applied also in those case where the intermediate circuit ceases to be live after
3 n9 i1 W% L# l1 W1 z& _interruption of the protective earth conductor?
7 F3 y7 U) \, c8 w9 |1 LDecision:7 V8 A! Z; \* \" b
Requirements for Basic insulation A-a1) should be applied only to those intermediate circuits, ?0 k" v" a# }. l7 _
which may be hazardous in single fault conditions.
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发表于 2012-11-5 11:48
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