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|  DSH 5905 n4 P5 [4 U, R2 ^$ j+ }$ C
2 U4 N: N; V& w | Rule for creepage across grooves and similar surface discontinuities8 S+ l( U7 z# s: k( V
| 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
P1 B/ C+ ^, N7 L. H) b | 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)1 L* T# W% D K, c# \9 f6 M+ w
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5 G$ \8 E* y, R! S2 T0 M
Standard: IEC 60664-1/1992
7 r* x5 Q+ [# H9 N; IIEC 60335-1/2001
, E9 X6 R2 g5 ?IEC 61010-1/2002 {7 _) y$ E% a2 Y& {5 @0 `2 N
IEC 61058-1/2000
- s# @& }3 y5 G8 Z( aIEC 61008-1/2002
" a$ a% o6 K0 e& g1 lIEC 60947-1/2004
' t2 O7 V& `# C0 T) JIEC 60598-1/2003
8 N2 w% s8 Z; d r. h3 f NIEC 60065/2005
# O5 B/ _9 I+ R) r) C' H: A R1 j9 FIEC 60950-1/2001& `% k. Z7 _4 v+ Y0 k3 Q( n2 ], B V7 h3 s
Sub clause:" s+ E3 E# d$ e! w" m% j6 s
See Table below
- O3 q/ P/ C0 X) KDSH N°: 590
; K) ^! G" O7 ?4 z& R5 t5 Z' }Page: 1(1). c+ Z# @+ T8 A: G' ~+ z2 ~
Subject: Rule for creepage across
8 J# F/ D+ J) g, A6 ngrooves and similar
- h* R4 ~3 B1 Z; ?8 U8 dsurface discontinuities5 e2 ?, Y* X6 z3 e1 M# A5 }
Key words:4 [( Q ~3 h% K9 \2 S9 t6 c- k
- Creepage
* S3 a4 x4 f& a* {# T. ^- Grooves
1 \2 i7 c: z5 q8 i) N- Conducting path: _! m& ?! }1 ?% y. W- I+ E
- Shortest distance
4 ]: P% p+ @1 x" _- Through air
/ Q: M' Z! g, W# M5 O. B; xDecision approved
3 a' Z; ]" b% g, j) D9 A9 B1 }by the CTL during
2 U4 @' h# z4 X+ B& b1 pits 43rd meeting in: _9 j7 G; Y' f- y' l) f3 ^ p
Johannesburg8 J. Q9 ]( |8 S3 w
Question: As can be seen from examples 2 and 6 of IEC 60664-1 sub clause 4.2 corners$ u) q2 g) Z" V$ z# X
with angles greater or equal than 90 degrees are not bridged. IEC 60664-1 does
5 @/ j4 m" A% V' Z# s1 inot contain specific information at which angle less than 90 degrees bridging3 z: M7 }0 m1 E' r. Y" \+ l8 k# ]
shall be applied. Some of the above mentioned standards specify that bridging7 t- }; H* R: P+ U. v
shall be applied for angles less than 80 degrees.: E7 c9 X- ]4 f
Can this 80 degree rule be applied in general for all standards?
4 w; L. W& Q5 L6 `# `$ J4 R/ e+ gDecision: Yes. The 80 degree rule shall be applied in general for all standards.$ N% o: L( \( w2 Q( \/ Q+ p, i8 n
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