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|  DSH 4103 S% h \5 L' d3 U
9 G2 K+ |/ ]* O D, q | Use of DC supply
7 z* K7 H9 v6 I/ m | 16, 20, 19.2
* _1 y7 j" D) z! q; a% q | 60601-1(ed.2);am1;am2
. k# [& L4 }$ H+ u+ ?. q/ k |
' `. }( ^3 J, a1 h ?Standard(s)- (year and edition):
( t) A8 `/ V3 w+ p* C7 i! ^! gIEC 60601-1:1988 Ed.2 Am1+Am2' A- N: y/ t/ N% e0 n
Sub clause(s): 16, 20, 19.2
6 ]+ V1 }! K8 |6 a7 V& w* d! q8 BSheet n°: DSH-410
" h5 ]3 v$ Y3 C+ t e! eSubject: Use of dc supply
# ~" [: e/ f/ K" {8 [+ pKey words: dc supply, enclosure3 J5 ?3 d. r+ h8 T4 D
Confirmed by CTL at its 39th meeting, in Cologne
( \) f" u' h# S1 h1 zQuestion:
( N4 V2 F8 }% `' V y/ i( DSome EQUIPMENT is designed for use in ambulances and operated from the vehicle d.c.) V. ]% e" u" E& L- {/ [% `& V( l
supply.with the negative side of the supply connected to the enclosure. Is this acceptable?
8 \; [. a1 @9 ^! b1 O7 x8 IDecision:# t2 e: y6 O1 I! z+ K) k0 L1 n
Connection of the negative side of the d.c. mains to the ENCLOSURE should not be permitted., a: H. t; i8 H+ n* {
The insulation between all poles of the supply and the ENCLOSURE must comply with 20.1 A-a17 C+ b0 ~& y! u" L% }
and A-a2." ?1 V! b) T8 {- Z, Y
Note: Vehicle chassis is considered to be protective earth.
1 J# k4 ]" @ H7 n! F" m5 [$ C! B; D2 o' n5 J! U
8 z8 i; F& t _! }
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发表于 2012-11-5 11:32
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