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|  DSH 590
4 M! B7 F/ N: z$ Q: e. A' d9 r3 S& g/ s6 B v# m+ k& A: [( Q
| Rule for creepage across grooves and similar surface discontinuities
7 g/ a, m8 G2 H7 b | 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+ d* ]/ A
| 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)* Q1 t' P/ b; u3 B
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Standard: IEC 60664-1/1992
% g. w7 g- X9 I% m+ b8 N' ]IEC 60335-1/2001! M2 A0 o2 t) r ^* O* G( d
IEC 61010-1/2002
; `: l; p% W( nIEC 61058-1/2000
0 b5 f- C4 L- K+ W* n1 ^0 mIEC 61008-1/2002
, L: ^% ]) M2 e7 h2 jIEC 60947-1/2004
/ {% f; j9 }- [( ]/ u' oIEC 60598-1/2003
! U0 F) z( i) C. c( |/ p2 B; BIEC 60065/2005
+ v% S; x- ~1 ]. ?IEC 60950-1/2001& {) H7 L8 @! t4 O& X/ n
Sub clause:
0 \* B& ?' x% WSee Table below8 c0 _1 q& G2 H) b4 ~7 y, R( f1 J$ Z
DSH N°: 590) M, R- s3 J6 ?0 t. C5 H. t0 n
Page: 1(1)2 O. o" i' e. J3 R( I' n3 C- U
Subject: Rule for creepage across- ?9 j' g* k2 s# @
grooves and similar
; i$ J/ i8 b9 Lsurface discontinuities
. L S+ t( r+ s# p2 n. ~Key words:0 S: b6 O1 N% v; y( @/ u5 e: }
- Creepage" V/ k# F/ l j3 K+ @. P
- Grooves+ p0 w5 X; G2 |( N4 _( E) j* z) @
- Conducting path- l" [5 c1 k. U% v- [
- Shortest distance e; j, N9 Z3 o, B$ o9 y8 f0 x
- Through air, }: c& h" O' _5 s8 A: n$ t
Decision approved
, P0 y, V- }0 T9 z! a$ C0 @by the CTL during
n. ~, p0 O) J( q- T( Xits 43rd meeting in# N8 v2 J- z- d
Johannesburg& c5 i0 t L0 e9 Q( V
Question: As can be seen from examples 2 and 6 of IEC 60664-1 sub clause 4.2 corners d8 x$ e- [, Q: y" L
with angles greater or equal than 90 degrees are not bridged. IEC 60664-1 does
: g& m6 c" O% h( Nnot contain specific information at which angle less than 90 degrees bridging9 W2 f3 n0 m$ n0 f% |
shall be applied. Some of the above mentioned standards specify that bridging
+ g$ p' _7 a% p/ z3 ?3 Q9 `shall be applied for angles less than 80 degrees.3 P; g# R c. y9 t5 g
Can this 80 degree rule be applied in general for all standards?) _: }$ D# j3 j! F! F5 P
Decision: Yes. The 80 degree rule shall be applied in general for all standards.
# G2 X6 K, S4 d- V& n9 b ]0 G- m) f) n) u+ `, C# v3 n
3 F; o! [! E; |8 i% |. d, ` |
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