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Standard(s)- (year and edition): N/ i0 a0 c- \; {
IEC 60601-1:1988 Ed.2 Am1+Am2% Q, a$ u& v$ I, t7 l+ D5 f; W! W' p
Sub clause(s): 16, 20, 19.2- P; H% I( O* L2 { g& Y3 C* _" [
Sheet n°: DSH-410
2 l( c9 U& \& Y7 \* d. p6 CSubject: Use of dc supply
$ U# r+ q" c4 V4 q) W3 xKey words: dc supply, enclosure
+ [$ ]7 C* S7 r0 \& kConfirmed by CTL at its 39th meeting, in Cologne
Z4 f: k# l6 p! cQuestion:, V, t, S) X) V
Some EQUIPMENT is designed for use in ambulances and operated from the vehicle d.c." J2 c) n3 Q2 A: ^( n$ M
supply.with the negative side of the supply connected to the enclosure. Is this acceptable?
' y7 N \8 @; d6 N/ kDecision:
9 H6 H# p! S+ ?# ]Connection of the negative side of the d.c. mains to the ENCLOSURE should not be permitted.
/ }. U5 f& m0 I5 ^' w GThe insulation between all poles of the supply and the ENCLOSURE must comply with 20.1 A-a1
4 }' N: ^/ ?! M* V; N0 S4 Aand A-a2.; t$ u( i# u+ T. S0 W( X
Note: Vehicle chassis is considered to be protective earth.
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发表于 2012-11-5 11:32
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