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|  DSH 590
+ d+ V) e) P! b F, {* H/ ~8 r" j9 R1 y9 B9 r
| Rule for creepage across grooves and similar surface discontinuities
6 t- X) Y9 r) }' I% j, U- c | 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$ A: |. n- c9 U Z H5 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)' `) e5 Q1 u, Y. O% L" p
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# c$ W0 [; u7 T) V4 hStandard: IEC 60664-1/1992$ E0 F3 K5 f S, x. B! c
IEC 60335-1/2001, K; g! O3 V* C% F3 t J
IEC 61010-1/2002
& r8 r0 I" _# n6 G3 V( lIEC 61058-1/2000
+ V* I2 S' v% ~* HIEC 61008-1/2002% X5 z9 f" ~2 M' f
IEC 60947-1/20049 w/ s1 f/ a. W! X/ s7 W7 m
IEC 60598-1/2003( J- V3 \) n: H" G
IEC 60065/20057 V$ o6 ^2 T1 a. z) d
IEC 60950-1/2001
% I+ D5 V! w, a. d( PSub clause:5 B3 K/ C( [4 y, Y& G$ K* m
See Table below
* V0 k0 `: t. J, o9 |7 TDSH N°: 590: Z; t+ W5 G- N. C( x8 H
Page: 1(1), ]! p: o" \' ?; h( P6 c# C9 s1 _
Subject: Rule for creepage across
" X5 `. _7 D( p( ~/ N4 {4 [grooves and similar% P: O0 Y/ q6 i8 l9 D
surface discontinuities: Q Q4 `+ z* Y `
Key words:3 O5 a* q; t# T) x
- Creepage( B4 s& D- c7 x( \3 B
- Grooves
. w$ N) w! a& H; u! J( r8 i" v- Conducting path
/ V6 h8 M8 `" Z0 A! f- Shortest distance
. c. E! A6 F' e z( C- Through air s7 b# F- m4 k9 v
Decision approved8 }# s# ?4 x# _, _4 x& \1 k3 E, d
by the CTL during
' ^; ~4 ~" b+ q1 Cits 43rd meeting in4 G4 u; B+ f. g' `9 I) r3 C
Johannesburg3 }/ K3 X6 t+ G/ a( B9 W; G1 n
Question: As can be seen from examples 2 and 6 of IEC 60664-1 sub clause 4.2 corners
6 ?8 \- ^) R: zwith angles greater or equal than 90 degrees are not bridged. IEC 60664-1 does+ Q( B3 j8 O3 x$ p
not contain specific information at which angle less than 90 degrees bridging
1 J2 }9 k1 H m/ \4 t: M- Ushall be applied. Some of the above mentioned standards specify that bridging9 }! Q" q* l( [5 _' X/ f
shall be applied for angles less than 80 degrees.* ^6 _/ u E4 j% }+ i$ g1 T1 X! b
Can this 80 degree rule be applied in general for all standards?
, ^% B9 P4 b K+ A7 Y& B0 A, cDecision: Yes. The 80 degree rule shall be applied in general for all standards.9 u( k6 G1 V: N+ U5 w3 j
/ |0 d! \8 J& ?* S1 r* p. @
, h$ |2 i" M* S: [5 ?5 B* F |
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