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|  DSH 410
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. \) _6 f3 m+ W/ O0 f% T' c | Use of DC supply
9 K- `3 Z! u4 `' {% Y | 16, 20, 19.2 R: O c, M- z% }8 t1 ]
| 60601-1(ed.2);am1;am2
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- z& p. J% @8 U! mStandard(s)- (year and edition):9 U, L. B1 |+ n. Q/ O- }
IEC 60601-1:1988 Ed.2 Am1+Am2
: n' L2 ~( O [, p7 F# X" OSub clause(s): 16, 20, 19.2
" }! J' a5 b0 ^6 H0 z0 vSheet n°: DSH-4108 o, y' G+ g( b p' R) `6 M7 c- h6 W
Subject: Use of dc supply& ~! ]) |$ u& Y' T" ^6 \! E, c
Key words: dc supply, enclosure: Q" j( ]- F0 V8 A( y
Confirmed by CTL at its 39th meeting, in Cologne
- s7 p1 `9 w& j1 r" {; i6 b: M+ ZQuestion:
2 w, a" `7 h9 x& o# p/ XSome EQUIPMENT is designed for use in ambulances and operated from the vehicle d.c.4 u J, A1 p" O2 n1 T; n+ l& b# k
supply.with the negative side of the supply connected to the enclosure. Is this acceptable?
! ~/ r% Y0 L. F) A- r! sDecision:
% Q4 r3 V% z) B1 Q$ H- SConnection of the negative side of the d.c. mains to the ENCLOSURE should not be permitted.4 H2 q3 p* a2 w" s6 W' \
The insulation between all poles of the supply and the ENCLOSURE must comply with 20.1 A-a11 J2 O8 w/ s' H
and A-a2.
6 e+ G; V% N& {2 j% z- D3 s( rNote: Vehicle chassis is considered to be protective earth.
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发表于 2012-11-5 11:32
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