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|  DSH 590& E/ I2 }8 H4 r1 u) b$ A) H; g6 \
" {- B1 Y9 k q& M! y | Rule for creepage across grooves and similar surface discontinuities
- B' w7 k) ~, q# \ | 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
( T# u. m7 m3 {" J) [4 r | 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( v' {+ l/ c% L6 e
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Standard: IEC 60664-1/1992& y% |6 s8 n$ U. ^9 u
IEC 60335-1/2001; x7 U) M- V7 V1 b0 `7 g; o
IEC 61010-1/20027 H+ Q. H( r- \& }1 K' k% G
IEC 61058-1/2000! Q# S* l& A$ D" C- S3 W7 Y/ B ~
IEC 61008-1/20029 M% p1 Z7 f( d& w
IEC 60947-1/20048 {$ L7 a5 _3 K# E
IEC 60598-1/2003
& B8 f+ N' S' f$ R* z7 u0 F, j9 FIEC 60065/2005
3 q0 R6 b# ~, DIEC 60950-1/2001
: z+ N' w ?- [3 R- R4 @Sub clause:
; t/ }6 l, i& wSee Table below% Q" z9 R, {7 A: @# Q
DSH N°: 590
7 |* S" U2 B/ _( H9 P4 ^Page: 1(1)% K* v+ U' L2 V0 q5 ?- @4 w
Subject: Rule for creepage across6 C, \( [8 j7 X3 ~
grooves and similar/ k; t3 E; X: i& |6 r
surface discontinuities) k5 v, O+ @ @# k" `& U) s$ n
Key words:
W; e# j2 p p+ H$ J- Creepage
$ j0 I. H( f- K3 L. {- Grooves
2 Z. V Y' B$ V8 I8 v' g+ H- Conducting path5 f/ a# k/ S) [2 q
- Shortest distance) y6 A* b& e8 j+ ^4 V
- Through air' W2 X: K7 P0 c/ i
Decision approved/ U( k% G: U0 _& m% J( {' J3 x
by the CTL during
* \* z: H6 E0 Vits 43rd meeting in8 O& `: u/ L V6 S
Johannesburg
( t6 r. @/ o1 nQuestion: As can be seen from examples 2 and 6 of IEC 60664-1 sub clause 4.2 corners$ C0 t2 o+ p& _! X/ T$ \
with angles greater or equal than 90 degrees are not bridged. IEC 60664-1 does$ Y/ C; @, Z0 B" g
not contain specific information at which angle less than 90 degrees bridging
4 x1 J" Q, z2 C7 tshall be applied. Some of the above mentioned standards specify that bridging
% }- a3 V0 T8 Ishall be applied for angles less than 80 degrees.3 a1 q# _2 T( f" K0 C3 t
Can this 80 degree rule be applied in general for all standards?
! c4 S' h, `# n3 u% |; v: l% O- x6 tDecision: Yes. The 80 degree rule shall be applied in general for all standards.
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