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|  PDSH 1009 }: _2 ]8 o/ j1 K4 x
+ ]& q( J# ?7 X9 q | Short circuit across creepage distances and clearances! b$ d5 J, J( k, c% Y3 u! ]
| 14.19 v- t( R! d! V3 A
| 61347-1(ed.1);am1 & 61347-1(ed.2);am1' }1 f. b6 y4 J6 q/ P# T1 p
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Standard(s):9 b( [$ Q, j9 R" e6 n$ x
IEC 61347-1 All editions
2 A% s: G! ^: s' \Subclause(s): 14.1
P1 ]- k; S: m/ N! U- ANo. Year PDSH 1009 2010
7 U6 E; S4 m: q: D$ cCategory: LITE Developed by: ETF5 OSM/LUM
4 k6 Z* N8 h5 c- f% T# DSubject:3 J8 w4 ?! L" t, n& w
Short circuit across creepage distances and clearances
/ y/ h7 W% o1 H7 A& Y- Q+ _Key words:# \* h4 ~. ` s' H+ J8 \4 J8 m
- COMEX# l/ D7 K2 C& r; w
- PCB
5 r0 o# c2 P9 n0 t, m& ]- Creepage distance and clearance4 B6 T! d. l5 h, b7 k" Z
To be approved at the 49th CTL Plenary Meeting, in 2012
7 k( l5 H( c6 G+ vQuestion:
+ E: E# l: N; v; W0 R6 u+ lThe standard specifies that between conductors on PCB’s, which are protected from surge energy from the6 J. O9 e" }: v2 f! N; f c
supply (for example choke winding or capacitor) the creepage distances and clearances may be reduced.& O5 }2 u5 Z3 y- F
Would such a reduction be acceptable after track-fuses, even before components, which reduce the supply* C3 E/ B( K7 t1 |7 `$ n W
surge energy?
( T8 W2 y4 t1 l, m2 FDecision:
5 h4 D9 u0 p& K; W- q5 BNo.6 }3 C" M5 ?. L$ T+ y( n9 }+ l
8 J- n/ [# M$ n0 F; W; V$ l, T$ u/ n& c1 w9 e& q
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发表于 2012-9-17 15:52
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