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|  DSH 428, Q) M- d1 G# F( C" n
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| Insulation between an F-type applied part and enclosure
: `% O4 i7 d7 S% k" A# S9 c | 20.2 B-d and B-e: J4 v. a+ x% a: X+ c
| 60601-1(ed.2);am1;am25 R9 Y( L( J1 S
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Standard(s)- (year and edition):! n0 _) R; X" |
IEC 60601-1:1988 Ed.2 Am1+Am2
* f; t" d+ W5 ?+ y8 \+ N6 [Sub clause(s): 20.2 B-d and B-e
9 M4 I. q b$ G- N" U5 Q; {Sheet n°: DSH-428
" A2 H( I4 ]0 ^Subject: Insulation between an F-type applied part and enclosure
3 `3 {$ T1 L4 o5 {* ~Key words: F-type, applied part, enclosure {( q6 i0 G1 @/ P6 R
Confirmed by CTL at its 39th meeting, in Cologne
& ?- g! S' p& A0 m6 j' }+ kQuestion:
' u) r/ D( h* g7 X& t1 n4 g1) Different interpretations may occur about whether to use B-d or B-e to state the correct
G; z4 r4 s- B1 [insulation level between an F-TYPE APPLIED PART and the ENCLOSURE.+ _7 F; w4 B f( ^
2) B-e refers to “voltages stressing the insulation”.1 V' I3 L& J. c8 K7 ?' ?! ~ a! W; M
What is a hazardous voltage stressing an insulation?4 I# f1 f- r7 ^9 l1 }- L9 ?
Decision:' _% X9 q P* n: O$ r
B-d is always applicable for a F-TYPE APPLIED PART. U equals maximum RATED SUPPLY
" @' @( {5 F4 {& TVOLTAGE; or, 250V for INTERNALLY POWERED EQUIPMENT. BASIC INSULATION
& N* n( }; ^/ |1 P. Z# Orequired.
1 v/ m9 |) y5 ]/ b+ O$ e: zIn addition B-e is also applicable if there is a voltage in the F-TYPE APPLIED PART. U equals9 i* g/ j9 [$ X# d8 L
the voltage stressing the insulation in NORMAL USE including earthing of any PATIENT( o) O6 q& w% B; z
CONNECTION. W, {( f/ D8 R- w' I6 A; u
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发表于 2012-11-5 10:31
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