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|  DSH 410) I2 U8 F9 ^) N# }' ^
5 Z; {! T3 U2 N% A& H q/ {6 d3 M4 v m0 Y6 h
| Use of DC supply
0 }% I: {" h. C, m& y+ S& @. ? | 16, 20, 19.2
* ]; Z, J3 a$ K7 I# c( w: _) Y | 60601-1(ed.2);am1;am2% D9 M8 N% W9 g
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Standard(s)- (year and edition):
4 [9 j r. t2 ^) i! n3 J" iIEC 60601-1:1988 Ed.2 Am1+Am2( w6 r; L/ H8 t1 R, J, {! R& t8 m
Sub clause(s): 16, 20, 19.29 C7 _: Y: e1 Z
Sheet n°: DSH-410' E$ v* c* u1 q) {$ G) B, Y3 o
Subject: Use of dc supply
& Q' X& a8 \7 Z( {; Z7 ^Key words: dc supply, enclosure
5 y4 [8 `9 L8 o) \3 G' |Confirmed by CTL at its 39th meeting, in Cologne
6 J: L4 h; g8 ^Question:
& O3 m3 J& y V4 N4 c: LSome EQUIPMENT is designed for use in ambulances and operated from the vehicle d.c.9 I" @( o8 y: ?' V9 G! R7 ^
supply.with the negative side of the supply connected to the enclosure. Is this acceptable?1 q% k6 C8 Q+ L! {3 a: b# T
Decision:
0 k* v3 e+ w. s+ `Connection of the negative side of the d.c. mains to the ENCLOSURE should not be permitted.7 a; d7 g: X5 j# j
The insulation between all poles of the supply and the ENCLOSURE must comply with 20.1 A-a1
- s# u7 `$ [1 ?1 v. y" R6 O- pand A-a2.
/ ^! v9 g. T( S6 TNote: Vehicle chassis is considered to be protective earth.
+ C$ U/ h% E8 Q- ^/ p- h8 o( [& C9 [+ s) L7 X$ x: }9 f
0 A$ D8 ?% |$ l: d+ C9 h
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发表于 2012-11-5 11:32
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