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|  DSH 590% E6 L1 w4 Z! y& h
C. X( G7 A; f/ m7 l, f# Y
| Rule for creepage across grooves and similar surface discontinuities! m0 k2 P p1 ]$ ^* E
| 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! b/ w' w3 d( x: b
| 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)8 `) f; G5 \ u2 [- J8 c* I: i
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' y4 d% g J% P4 h. x: m) ~Standard: IEC 60664-1/19928 s$ c, k, N" D1 N: K. z" m
IEC 60335-1/2001% U% c* j( T4 z! Z; N
IEC 61010-1/20023 X) N4 q$ g3 P' h2 q1 m2 ?1 L
IEC 61058-1/2000
% G h. x" o& G. bIEC 61008-1/2002
9 ~/ ?, l2 c8 M0 cIEC 60947-1/2004
) P( }# ^" J' e2 ?IEC 60598-1/2003% p9 \0 o- T6 M# w3 r
IEC 60065/2005
+ h" u/ |! O/ y/ {, ]IEC 60950-1/2001
8 x+ F) ^: ~* c7 q. i% U; ?Sub clause:
; N8 n0 G" t0 L1 x; D, ZSee Table below
4 j6 W9 H+ H& \5 k, C- F! oDSH N°: 590' B* q. t. l7 f& ~7 @+ I! u
Page: 1(1)( p$ R4 N3 J, M" L
Subject: Rule for creepage across
* ?: }* ^/ j( Z! F2 K8 ]8 dgrooves and similar
. k8 G/ }9 B( U5 t9 Dsurface discontinuities
, R# w- P9 {; UKey words:
h2 [: o d3 ], D8 b8 O/ u2 W! K- Creepage
+ H+ q' e8 @$ E9 Q" M: Y- Grooves% |& U; j- [ O0 {
- Conducting path( [8 I, w7 ]7 K
- Shortest distance) t# d# ]' Q4 T+ _# a% H% d* i; H
- Through air. k7 h7 a! h& X8 V+ ^; @+ X
Decision approved5 }4 ]: j; b9 F6 V' W0 ]
by the CTL during
9 }+ G; N1 w2 }* ]( l* `) Rits 43rd meeting in. i$ p' _/ J0 w q- q
Johannesburg7 N0 u6 |% u* ?( y
Question: As can be seen from examples 2 and 6 of IEC 60664-1 sub clause 4.2 corners
: B. z& M9 X& X# s+ R9 b3 [2 Z) m+ f' Dwith angles greater or equal than 90 degrees are not bridged. IEC 60664-1 does) Q. [* e" c8 S9 X% Q
not contain specific information at which angle less than 90 degrees bridging
1 Q3 ?) t' l! f" X m' {% Eshall be applied. Some of the above mentioned standards specify that bridging9 u$ x+ k* Z- R$ j: p l
shall be applied for angles less than 80 degrees./ [; {# V" o" A
Can this 80 degree rule be applied in general for all standards?
! F I# C' U9 a0 PDecision: Yes. The 80 degree rule shall be applied in general for all standards.2 Q6 J" w- w* I
) v8 o1 e3 B* {. z8 {5 a
# H/ m3 i/ P- h$ p4 V
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