DSH 402 General requirements

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DSH 402 & ^( t; ~* D% y7 ]/ P. M% d* f  \

General requirements " v: H/ N, |5 P! n9 w' k) t

20, 20.1 A-a1)

60601-1(ed.2);am1;am2 2 L: y1 P( C, r. b+ h) [" Z$ b

3 [: H$ l; ~2 c! `; f' \3 qStandard(s)- (year and edition):
& W) Z) c* B& g. ~$ n" v- kIEC 60601-1:1988 Ed.2 Am1+Am2
Sub clause(s): 20, 20.1 A-a1)
$ V: S$ x, ?2 @" I! x! lSheet n°: DSH-402
; m1 {" U# d$ l4 G7 U1 jSubject: General requirements
Key words: Basic insulation A-a1, intermediate circuit
4 D; R* O* a6 L" Y: y; ]& T. v+ _' YConfirmed by CTL at its 39th meeting, in Cologne
Question:
The requirements in 20.1 would appear to apply also to intermediate circuits which may or may
not remain live after interruption of the protective earth conductor.
7 ?$ ]4 [, d  O, r/ @Should A-a1) be applied also in those case where the intermediate circuit ceases to be live after
1 N5 L7 I- y, D4 b- Ginterruption of the protective earth conductor?
Decision:
; m  Y- O5 W, H9 ZRequirements for Basic insulation A-a1) should be applied only to those intermediate circuits
6 r9 u/ T( g' z2 d" H/ i* P+ Awhich may be hazardous in single fault conditions.
9 y5 ~7 A) }5 P0 }