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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: 2012-11-6 14:21
标题: DSH 590 Rule for creepage across grooves and similar surface discontinuities
DSH 5908 H& t6 r5 w& H) Y6 m
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Rule for creepage across grooves and similar surface discontinuities4 J: B& `  W3 F. @4 [
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/ J( W! x" o: N
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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7 U3 ]7 g2 _6 g# sStandard: IEC 60664-1/1992
  U8 E! I& N8 H( j# {4 v0 j, z1 ~IEC 60335-1/2001
' p" ^, o& U: c! uIEC 61010-1/2002
. g$ Q- ~. L; b8 v; S) Y3 Y8 x7 m2 dIEC 61058-1/2000
+ i7 \# a# r) a1 s- B9 c* R" lIEC 61008-1/2002
+ n$ D) e; I. J7 M0 z* F$ i1 ZIEC 60947-1/2004
% F, d4 q/ B) J1 y* U0 QIEC 60598-1/2003
: ~5 B. `0 J5 M- d/ eIEC 60065/2005
$ ~9 ?% M! T$ d2 o: IIEC 60950-1/2001' f2 ?% u  K) i
Sub clause:% G9 {- K* A- g- @$ e
See Table below
7 Y0 O# q* n- E- WDSH N°: 5909 V; e; K3 G: j9 x) b
Page: 1(1)
- I+ j) @# z/ Q! r0 RSubject: Rule for creepage across
- \/ N' ^- a  Dgrooves and similar
; T+ C7 M* Y" G0 o9 k* L' j! ]0 c* bsurface discontinuities
- G, R* z: B) p9 kKey words:
7 R$ j2 T% ~' g5 z- Creepage" `- L+ G" {6 r
- Grooves, C7 U, L  @; ]
- Conducting path, P$ ]$ U! Y6 D8 p
- Shortest distance( P% o, ~6 Y5 ?+ F$ E. U
- Through air  X  L7 t9 w' e/ o! A- k
Decision approved
, d& J" _% ?" E( P; U' L7 rby the CTL during% _" t1 T7 [# D6 E
its 43rd meeting in
( P. c4 S' P# dJohannesburg( ?& t3 \9 r3 d0 Y+ b
Question: As can be seen from examples 2 and 6 of IEC 60664-1 sub clause 4.2 corners
3 ]# ?% U! v; P! \2 }with angles greater or equal than 90 degrees are not bridged. IEC 60664-1 does
0 t4 d, E( @- C0 [' Tnot contain specific information at which angle less than 90 degrees bridging
5 G" {9 G. i) i) L6 w: R! \% Dshall be applied. Some of the above mentioned standards specify that bridging
7 ~1 G4 M5 c- V; nshall be applied for angles less than 80 degrees., ^. w' ]( W5 V
Can this 80 degree rule be applied in general for all standards?( N( D# S; Z4 e% g; T
Decision: Yes. The 80 degree rule shall be applied in general for all standards.
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