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|  DSH 5905 `0 b( \: d) J \. o6 t( a
4 ]+ [9 ]5 r2 j y" m* v; i
| Rule for creepage across grooves and similar surface discontinuities8 E* `, s, Y: c# i) \: k! n$ d
| 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
& @5 @3 m# \0 L3 u8 [ | 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)6 J: U3 I# |$ E4 O$ g" o
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/ x8 z8 F8 k* tStandard: IEC 60664-1/1992
; G( `9 i! ^' i( X9 `& MIEC 60335-1/2001
* Y( I# B6 |; @( r: l1 f3 M, ]IEC 61010-1/2002
. L$ ]- S' [$ ]2 d& n. ? {IEC 61058-1/2000
7 O- G- F) L5 r) J. XIEC 61008-1/2002; O l, v3 c( C- s e$ z( A( F8 k! u
IEC 60947-1/20044 e* s- w# w8 D# d$ w& E* `
IEC 60598-1/20035 l& p1 s1 O, w5 g5 I8 O4 m+ m9 ^0 D
IEC 60065/2005. B; P& G' F7 B/ o9 Y* E
IEC 60950-1/2001
6 ^- N% P! c; }: O+ I* P6 iSub clause:
# l, D) P0 H# d( @, r2 qSee Table below$ b. o6 I% W/ e4 i: }) E. r
DSH N°: 590/ _6 U% S" G7 R' v- \
Page: 1(1)
9 Q# I) s% t+ e) Y3 i# sSubject: Rule for creepage across
6 q9 y7 t6 Q$ A- v: e3 [+ M3 t* K( hgrooves and similar, P% E' C4 `- e4 I) t) d+ Y: t
surface discontinuities
8 R( |' @: _2 y4 v( D& {+ U5 ~7 MKey words:
, u5 w3 G J1 O" y: ~+ o- Creepage$ E8 e" K& y" r4 i, m
- Grooves
& U- x5 l& e3 a- Conducting path
3 t C/ O$ G5 S s% F, U- Shortest distance
( a# Q R* z4 v8 E3 i2 ?- Through air
/ P& a1 k z/ j$ TDecision approved. C6 a$ Y" I$ O* S$ x" r# S- r
by the CTL during
5 ?2 O* ]! h) s1 G& z1 ^* aits 43rd meeting in
% q$ C9 z1 A; N8 v# oJohannesburg) G( P$ u+ @, B
Question: As can be seen from examples 2 and 6 of IEC 60664-1 sub clause 4.2 corners2 b8 b. p4 h+ p# U/ ?! S, K$ a
with angles greater or equal than 90 degrees are not bridged. IEC 60664-1 does
, X6 z. m- I: l) [" w) c4 q# j5 Anot contain specific information at which angle less than 90 degrees bridging5 Y* z( K( u+ V% f) E! F5 M
shall be applied. Some of the above mentioned standards specify that bridging! ~& a) E9 x7 m+ F0 P5 }5 \
shall be applied for angles less than 80 degrees.
# Y9 _: A" y6 j7 KCan this 80 degree rule be applied in general for all standards?: ^$ H$ a' p9 X
Decision: Yes. The 80 degree rule shall be applied in general for all standards.! w2 |& s8 {: f, R
/ L R# d1 l `! |8 c. d
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