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楼主 |
发表于 2008-6-2 19:14
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Sorry, ITE说是CR不够. 如下是其原文:! J$ J3 }8 A" x6 _
According to sub-clause 8.9, a single layer of PTFE insulation having
% H' l7 U4 ?2 U8 P, w0 p% T0.24mm; O% x5 a2 Y- z7 v, s2 ^
(min.) is considered to fulfill the basic insulation requirement.8 z) W2 J! K( \; ?0 e M; w
; Q8 c+ ~+ _4 L/ ^
Now, recap to your sample, the tubing is already considered fulfilled! k' w; l" Q; `# o7 B {
with
% I: u, A4 T0 Nthe basic insulation requirement. In order to provide sufficient# |: S G6 n# z" |. Q
insulation, `9 n: z* I( s7 n0 w
(double insulation) between the primary winding and secondary winding,
* Q& S" @. e: {# h4 s8 E! Y# oadditional insulation namely supplementary insulation (requirement same: n0 X. G& q2 ?/ J
as
w3 \5 @/ r' F& |3 R* i, C/ Ybasic insulation) should be provided between the primary winding and that
. y# W( Q' g# d1 {0 otubing's surface. It means that the creepage distance between the primary
' n0 C9 ~6 x0 t! F! u5 Nwinding and that tubing's surface should be kept at least of 2.5mm.
( u, G. H& e" i+ sHowever,3 p) ^7 _6 E# O: C: p3 d
only 2.2mm measured at your sample. |
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