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|  DSH 590! _9 g+ @' s1 ]1 G2 H
7 C) {/ a, E% ]- H) r
| Rule for creepage across grooves and similar surface discontinuities3 F( w) `# Q+ M5 P7 s
| 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. Y) I9 c* f7 S2 K6 u
| 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) w. ~' O# ~# o5 T! g, C; s9 q, i
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" U. w) Z& z& p7 }- V
Standard: IEC 60664-1/19926 O2 m1 W. C# J+ q$ I' c/ J
IEC 60335-1/2001; ^9 b, {7 N4 n: r( G/ A
IEC 61010-1/2002
$ @ ]0 X2 L4 z, d# S# ?1 I% d& |& ^IEC 61058-1/2000( l5 D3 f, M( B/ v/ N
IEC 61008-1/2002
0 t. Z5 B0 Z! t9 k4 Y9 UIEC 60947-1/2004
* D( x$ {+ u/ G0 g/ pIEC 60598-1/20038 X6 s+ c8 I/ ?" m
IEC 60065/2005
8 {- `% h* n- LIEC 60950-1/2001
+ [( y$ G( s. MSub clause:" x7 E! d9 Z% i+ }* | f+ n
See Table below" U- g3 C, g- G
DSH N°: 5908 }0 I2 b$ `$ `$ O
Page: 1(1)
) j! T" `- O5 A/ YSubject: Rule for creepage across& f; s* `( V( y1 {, z- y
grooves and similar
; C O- K" r+ Z7 Q* C* y5 Y/ tsurface discontinuities
6 m9 d! f3 D7 o% ` b4 P, iKey words:
! [, m9 O$ e' Y- Creepage) Z8 ~) Q0 L% U& J# I% b% Q$ Z, [
- Grooves* o4 r* v: \+ F+ d
- Conducting path- H) j9 G' Q. F& v1 i/ [3 G
- Shortest distance! G4 q5 f' A5 A
- Through air. I* W4 _4 }. C( \) D0 Q; W" P2 c4 L' x
Decision approved
& M7 C w0 [; V: U) N# Bby the CTL during0 h& _$ }5 q3 ?
its 43rd meeting in
4 X" _% |. m- H0 f% N2 D0 [$ {Johannesburg1 W6 W6 A5 q- |% @6 s) _
Question: As can be seen from examples 2 and 6 of IEC 60664-1 sub clause 4.2 corners
3 W6 `0 @6 u$ b3 p5 mwith angles greater or equal than 90 degrees are not bridged. IEC 60664-1 does
- I% |: s8 K3 S; M( m; [not contain specific information at which angle less than 90 degrees bridging
7 f+ l" d& @% k/ n6 r% F: C: yshall be applied. Some of the above mentioned standards specify that bridging
* e: o( ^7 S7 y6 q1 \% W: m, mshall be applied for angles less than 80 degrees.& A+ S! Z6 `- C; @5 c4 U" x
Can this 80 degree rule be applied in general for all standards?
# `/ {8 ?$ U# U0 y. g+ k b1 X) UDecision: Yes. The 80 degree rule shall be applied in general for all standards.' _. @) W% W% ?' z% Q
9 c5 I3 S" p1 [0 \# D% J' ^; K4 I6 H4 R4 X
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