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|  DSH 402
# B) E& K" C+ o7 F! }' T' I4 `2 _. a' O/ h0 y
| General requirements
' x# i6 u$ v( q, h; I! V | 20, 20.1 A-a1)
* K5 I. W' Y# P4 K. c8 V3 b | 60601-1(ed.2);am1;am2# \! Z [1 \. s$ J- z2 @) D
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/ ~+ r+ ~2 p, W' K, kStandard(s)- (year and edition):5 x1 p2 @: i) j8 t" F
IEC 60601-1:1988 Ed.2 Am1+Am22 S+ }! X l- y; R1 t/ X3 P
Sub clause(s): 20, 20.1 A-a1)
) r( J! B: F5 w5 K' `Sheet n°: DSH-402- A4 G2 j6 k: _8 ^
Subject: General requirements
) @" R' c2 v6 DKey words: Basic insulation A-a1, intermediate circuit
5 O4 B* Q# \0 d/ S; S M9 JConfirmed by CTL at its 39th meeting, in Cologne
: I2 I- Y3 k* N: |0 DQuestion:1 P8 X3 [- |1 Z7 H
The requirements in 20.1 would appear to apply also to intermediate circuits which may or may* S9 T- S/ t- T; S' `* w9 `% @8 Q" J
not remain live after interruption of the protective earth conductor.
! H& V/ N8 Z% U1 w9 ] @Should A-a1) be applied also in those case where the intermediate circuit ceases to be live after& B8 ?3 | i i) U! ~* p
interruption of the protective earth conductor?2 e/ ~6 g/ a; e3 I5 Q; G
Decision:# O; i$ ]+ V# M- o+ j* D% O; w
Requirements for Basic insulation A-a1) should be applied only to those intermediate circuits E& E3 U, G5 x
which may be hazardous in single fault conditions.
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发表于 2012-11-5 11:48
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