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标题: DSH 410 Use of DC supply [打印本页]
作者: 小米    时间: 2012-11-5 11:32
标题: DSH 410 Use of DC supply
DSH 410
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Use of DC supply( C, e4 t  h2 V7 H4 d6 I2 @, u
16, 20, 19.2& B6 x8 d2 T# Y8 ^
60601-1(ed.2);am1;am21 t/ S) S, c. X+ p

: U/ b! ^3 U( A% P/ qStandard(s)- (year and edition):
* m: S& s* V  L: W/ L* JIEC 60601-1:1988 Ed.2 Am1+Am2
' h4 l2 f  ?4 J% @3 s  [, R) tSub clause(s): 16, 20, 19.22 S9 n2 B# U! s) D
Sheet n°: DSH-410: y4 R0 a2 o* x7 ^2 j; z
Subject: Use of dc supply9 M7 w3 T' J: Z) S
Key words: dc supply, enclosure
, ?$ ^4 P3 l8 v% l% oConfirmed by CTL at its 39th meeting, in Cologne$ W: K- S) Z2 n$ f+ J* `
Question:
* D# e+ ^' d" N8 z: ~2 ~Some EQUIPMENT is designed for use in ambulances and operated from the vehicle d.c.
/ o8 [+ q  H9 Z8 G2 ^9 E- U5 rsupply.with the negative side of the supply connected to the enclosure. Is this acceptable?( K+ E4 L1 C8 }7 ^) H4 U- r3 F
Decision:6 v. N' i3 J; T! R6 f6 @1 z
Connection of the negative side of the d.c. mains to the ENCLOSURE should not be permitted.* b5 N" M8 m: x6 e8 z
The insulation between all poles of the supply and the ENCLOSURE must comply with 20.1 A-a1. k. D% Y8 E  N% T/ t5 r
and A-a2.
4 ^7 [( L; g; ?' O8 g4 \Note: Vehicle chassis is considered to be protective earth.) H8 ^5 ^! `! d- s* J

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