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|  DSH 590
5 P8 [5 f; S6 b2 w% s0 p4 c; x; d8 Y# r0 H: F
| Rule for creepage across grooves and similar surface discontinuities
* J8 y0 W8 Y* O' s b/ w | 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
3 G0 t& C% @6 X: n, n. _2 D | 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), S3 |7 E7 q1 d0 @
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# O* G) {' B6 [0 d* u& T; l
Standard: IEC 60664-1/1992& s. u: Z' R' b: }
IEC 60335-1/2001
7 S: V- q( o1 K8 \) HIEC 61010-1/2002
' G: O! {+ X; S/ dIEC 61058-1/2000
5 w: ~0 F; j, D5 _, F: XIEC 61008-1/2002/ Q: Q/ J. K4 ~/ D! h
IEC 60947-1/20047 k, V/ c* F& Q5 ?& K7 P# _+ u: X
IEC 60598-1/2003
3 ~/ V% \$ Y. K0 RIEC 60065/2005
# [, y& q4 y. B" `6 NIEC 60950-1/20014 X- K( A, u. _: O3 I
Sub clause:7 G' X0 H) p0 }; P4 A
See Table below
8 ~) Y3 f5 M7 X7 |DSH N°: 590
/ F# Q/ P0 p5 X- P1 H5 M sPage: 1(1)" x- c, K% c5 r: a: M
Subject: Rule for creepage across! r) S, V; X5 M$ q2 S. ?
grooves and similar m0 t' I; ~- |! j
surface discontinuities. Z1 s5 O+ R6 l# y+ I3 {
Key words:: u- f7 _% K( C6 M& j1 `
- Creepage
6 O' Z; ?& k( l$ [ H4 x- Grooves, m% q, f [8 u9 \# e1 {, e) {+ J
- Conducting path
/ |; A, `7 ]# b# H/ G' `$ q- Shortest distance! ~" Y& L5 Z0 t" a" S$ }: J1 }
- Through air; Z! D9 t: x- p
Decision approved
5 s# J. `+ P: u" E# Oby the CTL during# j1 U Y" l7 U
its 43rd meeting in8 q/ n# R/ s; W2 F" S8 v+ k/ b' N
Johannesburg3 O; F7 A/ |$ l H9 }
Question: As can be seen from examples 2 and 6 of IEC 60664-1 sub clause 4.2 corners, Y4 J/ `' }$ l; P
with angles greater or equal than 90 degrees are not bridged. IEC 60664-1 does4 b9 C. e" ]3 b# f+ v F5 {. ?
not contain specific information at which angle less than 90 degrees bridging ]7 Z2 [3 f* H# G
shall be applied. Some of the above mentioned standards specify that bridging
8 |4 L0 P, S4 l; i; N- Zshall be applied for angles less than 80 degrees.
, I0 S( p' m4 ]. w" i( ^. OCan this 80 degree rule be applied in general for all standards?
# B& y# G) c9 D/ m! y. f7 x$ a( `$ zDecision: Yes. The 80 degree rule shall be applied in general for all standards.. y3 W; M. v4 g+ W. \/ Z& K" K$ H
9 B% @5 o" E: h4 C2 ~ |
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