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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 590
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  k' o: B9 F! B7 Y		Rule for creepage across grooves and similar surface discontinuities
/ `! w; w+ @1 P. k# S0 l1 n		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
9 m% o1 j, C. X% h+ 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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4 `# s- \% c9 c9 C3 w# sStandard: IEC 60664-1/19924 E+ a; d4 O9 D0 r& M3 N
IEC 60335-1/2001
8 g5 M: B9 T2 cIEC 61010-1/2002
1 B) d) e5 R) |9 J/ j5 jIEC 61058-1/2000  q, |* V* h5 ~
IEC 61008-1/2002
6 I& z) K+ n7 i7 T2 gIEC 60947-1/2004$ Q' U% R) e5 s: Q) U4 N3 n. I' Z7 F! g
IEC 60598-1/2003! _. s5 g9 ~8 I, Y/ G
IEC 60065/2005
$ S4 [4 a7 I6 D6 j8 RIEC 60950-1/2001. x  E2 Z- U/ K/ ?% M$ Q
Sub clause:& v3 M; m; W& Z) `( Z  r) d
See Table below
* s# }3 {4 P+ Y( N7 q( sDSH N°: 590
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! R) J" l& F1 \Subject: Rule for creepage across4 w* i. ?  q' @- o; ~6 @6 O
grooves and similar
1 |. I& U7 D2 Bsurface discontinuities" K& i; v) e8 ?0 u1 u  O
Key words:" c, p, ]- |' B) ~3 J* ~& J
- Creepage
  z$ m& e4 l! v" K+ y( g7 I  R- Grooves3 Y/ @" W" c. ~8 j' j9 ?
- Conducting path
. x7 v/ {% |" W- Shortest distance+ e4 w1 `; ]) o+ T! Q) z
- Through air
8 S1 t- n' g$ d8 ?& O! EDecision approved
0 X8 X9 I8 r5 b  R4 n8 d8 x  m, lby the CTL during
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Johannesburg
0 u: [# U' a  V9 v2 l- ?9 ]+ J3 dQuestion: As can be seen from examples 2 and 6 of IEC 60664-1 sub clause 4.2 corners
, d: k5 D: Y) G1 i  {with angles greater or equal than 90 degrees are not bridged. IEC 60664-1 does
! n1 N: i" K. j4 w8 ?not contain specific information at which angle less than 90 degrees bridging
4 _5 \: y, w( \7 t8 N$ i& @1 z8 fshall be applied. Some of the above mentioned standards specify that bridging9 [- B/ \! i5 m- T
shall be applied for angles less than 80 degrees.) L4 [2 L2 b/ a  c* X( j1 T0 k6 b
Can this 80 degree rule be applied in general for all standards?
# l% M! U) U% U) }/ k. ~Decision: Yes. The 80 degree rule shall be applied in general for all standards.4 L& ?5 i, q+ c& R! r
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