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|  DSH 590$ N) l' J, v5 h0 ~$ c
* z" m' _/ J4 s8 g, s
| Rule for creepage across grooves and similar surface discontinuities# d5 F% |' r- @$ z X# C7 ]5 j5 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" _ i; A1 Q. G |0 z
| 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)
6 T$ c" l# M% H% I2 m* s% f |
1 G. u% O! L8 _7 U9 [Standard: IEC 60664-1/1992
" y; @% d2 z5 V$ N; L: l% wIEC 60335-1/2001# n* P N+ r( I9 {, B* ]7 G
IEC 61010-1/2002/ C. ?# G. U) J' M
IEC 61058-1/2000- l/ |" z" g- t2 B4 r% W
IEC 61008-1/2002
Q. K- w0 D1 G- O+ J9 O0 wIEC 60947-1/2004
. o% g! T4 p- s7 a2 t; bIEC 60598-1/20035 }2 \( [6 V6 R0 M: o' v
IEC 60065/2005/ `- n$ ~3 N( l, L& G. `6 Y
IEC 60950-1/2001- s) A' l6 J/ w5 D
Sub clause:
! Q/ B6 n" _* Z4 V' c% e1 CSee Table below
, P* j% q5 U& rDSH N°: 590" u1 K& b F3 q+ T
Page: 1(1)- n$ s, O1 ^( N$ u0 X& j
Subject: Rule for creepage across8 t! c0 `2 x$ V2 l( q+ t
grooves and similar) T2 b" r7 w) K$ y1 _' E
surface discontinuities9 f5 ^% {) p* A# Y/ p' R# H' B6 \! u
Key words:
3 w% r$ F& n. s+ j, V- Creepage
. k. s. f4 `6 k U5 P2 i- Grooves" `; ^- h2 T0 `- S3 `" U1 u
- Conducting path
+ a L, s) T0 k6 o* K; J- Shortest distance! R& h. n, ~- k
- Through air
# W( O* f! _1 _Decision approved+ w2 Q; ]( f. [/ r1 l! G4 J7 f) t n
by the CTL during
9 q' N- p+ M2 t( K0 {) j' O( yits 43rd meeting in
7 X$ }6 q# G4 ~! Y b' U& KJohannesburg- p6 I/ C5 B/ T/ @4 k# W; R
Question: As can be seen from examples 2 and 6 of IEC 60664-1 sub clause 4.2 corners! G& B- F9 i- `( {
with angles greater or equal than 90 degrees are not bridged. IEC 60664-1 does
- C6 a( a* t6 J9 v1 qnot contain specific information at which angle less than 90 degrees bridging
8 O' [5 T: D) |2 Ashall be applied. Some of the above mentioned standards specify that bridging
; Q! U: E+ `: g0 g0 L2 F! Jshall be applied for angles less than 80 degrees.' ~' T" R& [( ^( [; E
Can this 80 degree rule be applied in general for all standards?
( R2 u4 O5 g2 r+ r& ^! {Decision: Yes. The 80 degree rule shall be applied in general for all standards.. T. Q, W5 d/ T2 X
9 i; [2 K8 i% _1 D
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