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|  DSH 590
& p) x h# ^3 j& B$ ~, l, F2 Y- o- |8 Q: j! W& K
| Rule for creepage across grooves and similar surface discontinuities! r( H6 u1 t9 K: 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
5 \9 q6 S# ~; E. ] | 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) r4 S# B7 f3 d- m0 w3 L
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# W& R# X' h5 `! lStandard: IEC 60664-1/1992
+ x, {/ ? |" O/ [8 H3 p# g3 W4 g' MIEC 60335-1/2001" u" x D* c- M
IEC 61010-1/2002
" N( q t! E; C. a5 |7 ?IEC 61058-1/2000# |1 D9 n' a% P6 o) f
IEC 61008-1/2002
8 V4 T9 |+ x Z2 ]% T/ X* c! PIEC 60947-1/2004
2 ~! @$ Y2 z0 \) A1 H# SIEC 60598-1/2003% x; n8 o3 v0 j! K( d
IEC 60065/2005
; w6 F( r& n& e: r6 L: q- vIEC 60950-1/2001
* z0 c+ z, w( Q1 _4 aSub clause:. q& E" N9 L' c4 H- N
See Table below. d5 d; G% t+ H+ O' N0 ~2 ]
DSH N°: 590 i5 {$ C& S! t7 p$ f/ J0 Z3 o
Page: 1(1)
$ f: \4 q" P! z) TSubject: Rule for creepage across* d& K6 \# ~$ K6 j: v+ W
grooves and similar
7 z0 O+ M+ v* Osurface discontinuities
2 ~# i* A; I3 O( ]& w0 vKey words:
9 ^. X d0 _0 ~, V" E7 X- Creepage
0 x" @4 \: w e2 |- Grooves! A& L- J. a" [0 m5 |
- Conducting path1 l& t+ U& n; J0 @8 U. w8 _% ~, }
- Shortest distance* K, m* W3 u0 ^
- Through air
" ?; ], t1 M/ ]( M l9 c0 W) |Decision approved# n) s' v3 g" p* d6 k& t m' [
by the CTL during
$ a0 Z4 s1 T3 Oits 43rd meeting in
8 L0 W1 G& L0 _$ ~1 t- O2 ^Johannesburg; @/ i( y; |7 ^' v% Y
Question: As can be seen from examples 2 and 6 of IEC 60664-1 sub clause 4.2 corners
2 z2 b/ n) l6 awith angles greater or equal than 90 degrees are not bridged. IEC 60664-1 does
0 I& V# R A2 ]/ W! Vnot contain specific information at which angle less than 90 degrees bridging0 h1 \& n" J8 J
shall be applied. Some of the above mentioned standards specify that bridging
, @: u; h9 t2 M7 G& Nshall be applied for angles less than 80 degrees.
: _* J: B) }5 A" h( BCan this 80 degree rule be applied in general for all standards?
# c' e0 Y! A6 F) K: k' I3 y6 r* TDecision: Yes. The 80 degree rule shall be applied in general for all standards.) c4 j. F) [6 [$ i' R
4 ~# W+ p7 E& r1 W
$ N2 c7 w9 C! s3 [7 y% p3 z
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