DSH 402 General requirements

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General requirements

20, 20.1 A-a1) * h9 @3 g) i% P5 {

60601-1(ed.2);am1;am2 1 e4 Z8 L# g( T9 Z! k+ b/ `

5 _2 J  ^" n' DStandard(s)- (year and edition):
7 s+ E; B8 H+ IIEC 60601-1:1988 Ed.2 Am1+Am2
Sub clause(s): 20, 20.1 A-a1)
Sheet n°: DSH-402
Subject: General requirements
Key words: Basic insulation A-a1, intermediate circuit
Confirmed by CTL at its 39th meeting, in Cologne
# X9 _# V% x; X  {& M+ Y8 YQuestion:
5 y# {9 |9 f3 e2 e  j) F; uThe requirements in 20.1 would appear to apply also to intermediate circuits which may or may
+ Y: G% G- h4 O5 d7 \% _; d% Z) Hnot remain live after interruption of the protective earth conductor.
Should A-a1) be applied also in those case where the intermediate circuit ceases to be live after
0 c( ]$ v, Z' E' J. g% C( X- Xinterruption of the protective earth conductor?
Decision:
Requirements for Basic insulation A-a1) should be applied only to those intermediate circuits
which may be hazardous in single fault conditions.
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