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|  DSH 590
5 G3 d$ v0 u, n: m4 c" e/ }9 u- ^& z, X
| Rule for creepage across grooves and similar surface discontinuities" L8 r7 i9 L, e# P
| 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
4 w+ x3 ?& C5 T | 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)& d1 w/ j; M7 C1 V8 B! r. D/ w
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Standard: IEC 60664-1/1992
% m' ~3 s' C4 Q7 ?IEC 60335-1/2001- w1 [' @9 j! L R" W
IEC 61010-1/2002
6 D+ J: x* Z3 ^; M6 S, EIEC 61058-1/2000
, v& w% L# T. P7 q( L5 cIEC 61008-1/2002
# `& Z+ e+ e! C% B: A. @' GIEC 60947-1/20044 N) N- Z) F5 E
IEC 60598-1/20032 Z# N" W M% G8 C3 y( l
IEC 60065/2005- z8 ^6 B0 J5 p1 ]; v
IEC 60950-1/2001
, u+ y" z* s. M. }8 _/ @- W/ b1 RSub clause:
* m. u1 Y8 e' f! cSee Table below- n& w# W3 |% w P& ?( g
DSH N°: 590- H$ n( }. [% ^4 l8 A+ Q
Page: 1(1)/ L& b8 C6 o" ?
Subject: Rule for creepage across
3 n) I0 J2 u, G; Q5 Sgrooves and similar; B/ g9 G: m U& f( |
surface discontinuities- y1 P B/ G# p9 A
Key words:: u" R/ ^! X( q4 E L
- Creepage
: M* O7 z! y7 |& ?- Grooves. `$ d5 ?- R3 ~2 N
- Conducting path
& R1 w0 n; \, w. I5 T2 F- Shortest distance
( z }* D' `( M. F6 W- Through air
2 t& S* {2 A3 x9 t/ l7 N+ h7 `Decision approved' A" D' J. q+ f! a( T1 R
by the CTL during' B7 K( ?& i/ p8 _* o
its 43rd meeting in; Y x- t% y7 a! v4 B$ e) e
Johannesburg: j" ]3 n1 e+ G0 {; d( Q
Question: As can be seen from examples 2 and 6 of IEC 60664-1 sub clause 4.2 corners
6 h! a# E8 n" [8 p* `* a. M$ cwith angles greater or equal than 90 degrees are not bridged. IEC 60664-1 does
, J/ M1 I( Y# n0 |' P* ?! S1 l2 unot contain specific information at which angle less than 90 degrees bridging
) j4 K& h6 l0 l+ Mshall be applied. Some of the above mentioned standards specify that bridging
7 O$ Q" Q: J! Q z& N# t& Ushall be applied for angles less than 80 degrees.
$ }5 s4 A* c) g0 |' \5 lCan this 80 degree rule be applied in general for all standards?$ G/ l: c- c" A E5 f7 }
Decision: Yes. The 80 degree rule shall be applied in general for all standards.5 u! U! ?) r6 n z% U
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