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标题: DSH 428 Insulation between an F-type applied part and enclosure [打印本页]
作者: 小米    时间: 2012-11-5 10:31
标题: DSH 428 Insulation between an F-type applied part and enclosure
DSH 4289 J5 z3 G1 v! H# ~$ s0 l
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Insulation between an F-type applied part and enclosure6 w4 R4 ^2 e* M3 w; ?
20.2 B-d and B-e
% i  E% Q' h9 s2 q8 z. \		60601-1(ed.2);am1;am2
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% M) K1 P$ I# X. F( VStandard(s)- (year and edition):
5 g5 W' ~3 j3 h9 ?6 ?/ bIEC 60601-1:1988 Ed.2 Am1+Am2( x% V8 I) \$ N
Sub clause(s): 20.2 B-d and B-e
; X0 U  u4 W% \' P, z3 ~- S: CSheet n°: DSH-4283 P) E, T, t9 q% K& J! L3 G3 D0 M9 |! {
Subject: Insulation between an F-type applied part and enclosure" Z& P* ~3 _5 d0 O) z# F7 g
Key words: F-type, applied part, enclosure
8 J/ E+ {( `3 ?- C$ YConfirmed by CTL at its 39th meeting, in Cologne
  H4 |" y5 O# {1 H! ?0 CQuestion:
  n$ \' x  }7 d1 p1) Different interpretations may occur about whether to use B-d or B-e to state the correct
" f4 u" u2 l0 R0 minsulation level between an F-TYPE APPLIED PART and the ENCLOSURE./ U2 `- Y# I- n
2) B-e refers to “voltages stressing the insulation”.
0 {5 a) z3 n# x; h- K4 QWhat is a hazardous voltage stressing an insulation?
! X4 O& \+ L4 k* f9 F! \6 l- @Decision:8 ^/ w3 \4 H; H6 t2 J: |
B-d is always applicable for a F-TYPE APPLIED PART. U equals maximum RATED SUPPLY" R4 s. H/ p" m
VOLTAGE; or, 250V for INTERNALLY POWERED EQUIPMENT. BASIC INSULATION0 |5 @$ u( v; w1 u3 n( v# K
required." ?% M8 g* {3 o' K4 T" }: c
In addition B-e is also applicable if there is a voltage in the F-TYPE APPLIED PART. U equals" i8 b2 _6 `: C5 j* p- R3 W8 L
the voltage stressing the insulation in NORMAL USE including earthing of any PATIENT
& ?& ?+ f* t" \7 @' W3 kCONNECTION.
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