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|  DSH 4107 |. ]6 W7 U5 w
% i; p8 w- j+ Y- D; Y | Use of DC supply
: `' A6 }/ P _3 n | 16, 20, 19.2" v- |" v4 Z- z, h
| 60601-1(ed.2);am1;am2
x/ A0 M- k2 h& f% m" P/ U/ i8 a) D% _ |
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Standard(s)- (year and edition):- p: ?6 }1 s9 K4 W5 `0 a: A
IEC 60601-1:1988 Ed.2 Am1+Am2
# b* J: g$ y1 D1 W$ r' y, z* g; B4 CSub clause(s): 16, 20, 19.2; \) H1 h8 H3 X, ?
Sheet n°: DSH-410
. W5 r# i: j" [ k$ y) hSubject: Use of dc supply& o! S0 X( i% n4 I
Key words: dc supply, enclosure
0 Z5 \& Z Z1 Y( tConfirmed by CTL at its 39th meeting, in Cologne
. A, | J; R& q: xQuestion:
0 U, j8 M0 Q# ?! j: w: Q' eSome EQUIPMENT is designed for use in ambulances and operated from the vehicle d.c.
3 h8 S* y! S1 A% t8 m( Xsupply.with the negative side of the supply connected to the enclosure. Is this acceptable?" A) h* W, e& {" J; F5 E, e& j
Decision:. N/ J! s4 n( b$ V- R! [8 p5 z$ Q# M
Connection of the negative side of the d.c. mains to the ENCLOSURE should not be permitted.
% ^( R% B( b+ E( D% h- Z; A' C- ~The insulation between all poles of the supply and the ENCLOSURE must comply with 20.1 A-a13 t! i' ^3 ?) G
and A-a2.
" N- s2 }) v4 w) H, H/ UNote: Vehicle chassis is considered to be protective earth.; B4 M4 v2 r# f2 |' o: U& K
! }0 q7 t* d y0 `: \% K
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发表于 2012-11-5 11:32
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