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标题: DSH 590 Rule for creepage across grooves and similar surface discontinuities [打印本页]
作者: 小米    时间: 2012-11-7 19:17
标题: DSH 590 Rule for creepage across grooves and similar surface discontinuities
DSH 590
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5 d  N* m2 J9 A, ^" T/ P1 }( K		Rule for creepage across grooves and similar surface discontinuities& c( k: {# i3 N# Q; L
IEC60664-1: 1992 cl. 4.2 IEC60335-1: 1991 Annex E IEC60335-1: 2001 Cl. 29 IEC60730-1: 1999 Annex B IEC60950: 1999 Annex F IEC60950-1: 2001 Annex F IEC60065: 2005 Annex E IEC61010-1: 2002 Annex C IEC60601-1: 1988 Notes Figs 39-47 IEC61558-1: 1988 Annex A IEC61058-1: 2000 Annex A IEC60598-1: 2003 - IEC60745-1: 2001 Annex A IEC61008-1: 2002 Annex B IEC60947-1: 2004 Annex G
# M6 e0 {; {0 ?! l* `( _2 h		60335-1(ed.4) & 61058-1(ed.3) & 60598-1(ed.6) & 61010-1(ed.2) & 60950-1(ed.1) & 60947-1(ed.4) & 61008-1(ed.2);am1 & 60065(ed.7);am1 & 60664-1(ed.1)
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% L3 I# t3 s$ n0 Y1 gStandard: IEC 60664-1/1992
8 n- w3 ]" {) P3 q: k; t# I& }IEC 60335-1/2001
8 ]4 K8 Y* ^5 g  @4 I3 qIEC 61010-1/20022 `5 O- {$ H% Q3 C
IEC 61058-1/2000& ?/ R( q0 T5 \7 C7 q! s
IEC 61008-1/2002
. z9 u+ z3 @" s; EIEC 60947-1/2004
% ~% {2 U( p. v$ p' l# w" DIEC 60598-1/2003. z) Q3 U: ?. X: i
IEC 60065/2005
5 `; R' D, ?+ o/ _, ^$ UIEC 60950-1/2001! u7 M. P4 H+ X- D; E6 O) |
Sub clause:) }: r: u9 I; J- v7 P+ }- D) K6 l7 b
See Table below* t) \9 q6 H! `3 S8 ]
DSH N°: 590
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Subject: Rule for creepage across9 Z2 @5 |$ O8 k6 F& R5 B
grooves and similar* \6 J* L$ s/ D& Y
surface discontinuities/ x4 H6 X7 r, S, K/ L7 c9 h( {3 `
Key words:
4 o; D% s& W; ~: X% A! E- Creepage* J' R3 [' `- _; x7 k$ @
- Grooves: O& I; \* q5 y# V4 x4 B8 K
- Conducting path# X8 j; A/ N4 Z4 Z
- Shortest distance) l( n  Y4 B( L8 `0 J$ _( n0 q
- Through air
( D$ b' p) t- c" m4 {4 CDecision approved
( }9 R9 k( d( N1 _* l& r& g# Y( Bby the CTL during
, A8 |. d9 V+ x8 Zits 43rd meeting in
; i1 T, _6 N( x; p, F& ]1 D- d( CJohannesburg5 x& ]' X/ i# d
Question: As can be seen from examples 2 and 6 of IEC 60664-1 sub clause 4.2 corners
# ^: Y! A! M' K4 f7 A4 z  }. \$ fwith angles greater or equal than 90 degrees are not bridged. IEC 60664-1 does
: [; \; }; L) |* @0 Anot contain specific information at which angle less than 90 degrees bridging
3 h  Z0 r; t: e+ n7 V! V, i: ^6 B9 Pshall be applied. Some of the above mentioned standards specify that bridging" o1 S' k6 s% J  F% Y# o* S. G. g
shall be applied for angles less than 80 degrees.
% j: Z  O5 }/ }7 c0 r" K% E* K8 HCan this 80 degree rule be applied in general for all standards?) _' t/ j. `/ d
Decision: Yes. The 80 degree rule shall be applied in general for all standards.6 K) g/ H$ m3 G" h( e3 i4 m
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