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Standard(s)- (year and edition):) V- g, w3 P9 E7 q/ V
IEC 60601-1:1988 Ed.2 Am1+Am2
+ c- @. H& {' N$ `6 qSub clause(s): 16, 20, 19.20 |" b& \$ x! e8 O l
Sheet n°: DSH-4105 O! x+ g; g: H
Subject: Use of dc supply
) z8 w2 J" m, I3 Y, q' Z( y/ dKey words: dc supply, enclosure
0 E6 f! w0 k& n8 a0 F" KConfirmed by CTL at its 39th meeting, in Cologne
. e# d- q* r' gQuestion:" ?; W: K7 i3 R
Some EQUIPMENT is designed for use in ambulances and operated from the vehicle d.c.) h2 M" }0 O. c
supply.with the negative side of the supply connected to the enclosure. Is this acceptable?
6 v: g2 W* t' _( z) ^1 iDecision:
0 W4 X* Z4 d9 p1 JConnection of the negative side of the d.c. mains to the ENCLOSURE should not be permitted.& Q2 ]6 w& Q/ Q' L% Z; ~8 v
The insulation between all poles of the supply and the ENCLOSURE must comply with 20.1 A-a13 h& m Q* e1 ^1 ^* w
and A-a2.
) b7 m5 @: `- r- S1 m" Q4 y- VNote: Vehicle chassis is considered to be protective earth.7 ^/ t6 {! q( y- s1 D
& M# _8 f, v' P/ Q3 j: C4 y
0 y) ]2 v4 n. ^3 p! r9 u
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发表于 2012-11-5 11:32
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