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|  DSH 4107 N y" C$ `( p
7 F* q2 r$ ]1 R# X, i | Use of DC supply
6 a% _3 b' K# |+ M, X2 V% _' J0 t% i: I | 16, 20, 19.24 Z7 g2 J; x; |; h
| 60601-1(ed.2);am1;am26 b& h# w3 H: l7 p
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2 r! }" W* G# D. ^- H0 ^+ t1 S
Standard(s)- (year and edition):
, D9 A, w: P4 j zIEC 60601-1:1988 Ed.2 Am1+Am2
- g1 K0 F8 I: P4 n! d$ Z. M+ cSub clause(s): 16, 20, 19.2' b6 E; k, G& d/ h
Sheet n°: DSH-410
1 I- D5 @# f C' n& L) `+ zSubject: Use of dc supply
1 n) Z2 v0 i4 G ^5 F$ _1 wKey words: dc supply, enclosure
& p' D( C6 I) E3 DConfirmed by CTL at its 39th meeting, in Cologne, u4 d4 f$ X( A0 \+ U* f. V! Y9 I' H
Question:
4 C/ o# P- k8 C( H3 q# }Some EQUIPMENT is designed for use in ambulances and operated from the vehicle d.c.
. R/ m8 O/ b( Lsupply.with the negative side of the supply connected to the enclosure. Is this acceptable?8 l; J, o7 o0 m3 r8 R; Q. g
Decision:$ W4 ?- M$ _* s% i; e0 A8 E
Connection of the negative side of the d.c. mains to the ENCLOSURE should not be permitted.& z% O! ~* s) P# i& ~
The insulation between all poles of the supply and the ENCLOSURE must comply with 20.1 A-a1. U! E1 |7 v L- c y. \
and A-a2.7 U, V$ B$ S) f# Q$ J
Note: Vehicle chassis is considered to be protective earth.9 w; U' U( Q6 ^5 v) E: ]
, D! {5 U$ B9 T( ]# o( k
8 K5 G0 Y: L0 c! G
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发表于 2012-11-5 11:32
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