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|  DSH 402
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| General requirements" b; \0 Z! g) ?! e) X
| 20, 20.1 A-a1)( |; \, Q5 ^: ?: O1 O E X7 C: y
| 60601-1(ed.2);am1;am2
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" `, L( C' }7 X+ |, E7 ?Standard(s)- (year and edition):3 A. F: \; J+ o; |! c" ~+ z
IEC 60601-1:1988 Ed.2 Am1+Am20 v# p# L- x8 Y# Q* z, e; j
Sub clause(s): 20, 20.1 A-a1)8 W& Z: V s/ S4 g
Sheet n°: DSH-402' e T2 `7 O% ~0 e
Subject: General requirements( M: g0 v3 A0 X5 g
Key words: Basic insulation A-a1, intermediate circuit) k! J' X5 \7 p! Y2 x! N0 _
Confirmed by CTL at its 39th meeting, in Cologne6 c/ D# o; }8 Q% Z$ V
Question:
Y& a, S# Y/ Y" P7 ^7 s" g2 a! ?The requirements in 20.1 would appear to apply also to intermediate circuits which may or may* I9 U4 m! ~6 T% }) ]3 L. n6 G
not remain live after interruption of the protective earth conductor.1 y- e# t2 j6 _3 M
Should A-a1) be applied also in those case where the intermediate circuit ceases to be live after
|+ ]+ d, j. R+ f6 [( m1 R7 R3 yinterruption of the protective earth conductor?
" ~& a* N' ^4 [& p4 |! }/ x0 `Decision:
% g2 X% ? O1 A4 x, ERequirements for Basic insulation A-a1) should be applied only to those intermediate circuits" n G3 O( z+ |3 ^- V- ~$ O
which may be hazardous in single fault conditions.# ^( e* A j- X; J( w/ |. R
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发表于 2012-11-5 11:48
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