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|  DSH 5909 M' o0 m6 e5 b# T! `9 b6 s
. [; B7 ?6 P, \ L- Q9 s
| Rule for creepage across grooves and similar surface discontinuities2 C4 | V" [( K
| 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 G7 F i7 P1 g5 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)+ T# q o6 y" f6 v$ v2 i' V
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) M# y8 O. f4 F, K S1 HStandard: IEC 60664-1/1992
' G) @' s8 r( U: K9 { M( VIEC 60335-1/2001
$ V; ]$ h% i3 L6 b3 l" cIEC 61010-1/2002
+ k% h$ X d' a5 s% N. rIEC 61058-1/2000( V, {; Z7 s* m7 O$ h! ~
IEC 61008-1/20029 q5 i3 j- a# H. |% t
IEC 60947-1/2004/ K& s* g" m4 M3 [% J
IEC 60598-1/2003
' Y6 I1 u- H1 |* O; `. \2 d6 p* \IEC 60065/2005
7 U( H: o& ^) t; k& Y( YIEC 60950-1/20015 j3 d; g, B+ H- t' m B
Sub clause:
3 U! w( I/ S5 x9 }& ^See Table below
; i' m- _4 O3 M; x6 o! }DSH N°: 590 ?5 C2 l4 d/ F$ {& e% \. L
Page: 1(1). p; i% ?& P+ ?5 X) l& Y4 C5 {
Subject: Rule for creepage across8 o2 C6 ]( G8 i
grooves and similar
- U1 L% P- i) L& N, M# }surface discontinuities4 y+ p [4 X: R" z: c! _& C2 ^4 C
Key words:
/ E0 n% ^4 s2 F- Creepage
: U2 g. L% D4 R; S- Grooves
) g9 M: }! W8 i# @7 G& I- Conducting path* p: K7 \! m- W7 B: F- W% \
- Shortest distance' w; c" |) N, g( {3 p
- Through air3 k; R. i# K5 K9 G6 p
Decision approved8 a3 p0 X/ m6 P# c8 P$ t! o6 A
by the CTL during
- Z5 y& o% n8 C W) P! n2 jits 43rd meeting in
* V( Z5 X( z, E4 iJohannesburg8 A+ Y( W) K& S8 O& Q, V
Question: As can be seen from examples 2 and 6 of IEC 60664-1 sub clause 4.2 corners7 K8 h6 [+ j& I* e6 L0 @5 E3 i
with angles greater or equal than 90 degrees are not bridged. IEC 60664-1 does
) Y* ]/ k5 H9 ^8 L Q1 l3 g$ a8 Dnot contain specific information at which angle less than 90 degrees bridging, y2 x& M" l5 O: N6 B, e" ? [
shall be applied. Some of the above mentioned standards specify that bridging+ K, U4 Z/ [6 w/ T ^% O5 V
shall be applied for angles less than 80 degrees.' H ]% W9 q$ o3 U, L
Can this 80 degree rule be applied in general for all standards?
# B' c! ~2 Z5 d" h' h C GDecision: Yes. The 80 degree rule shall be applied in general for all standards.7 m3 C& L! \6 @/ k' k
, Y8 E( f! e9 {7 k9 Z
0 D! H& g4 T& m, p4 g. o$ g5 s |
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