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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:
) n; j3 I' l- ^' @% Y, YAccording to sub-clause 8.9, a single layer of PTFE insulation having, X8 y7 }8 u# |9 p" f5 m, B
0.24mm3 C/ Q) L. W$ u7 c# N. t
(min.) is considered to fulfill the basic insulation requirement.
) D7 x6 ~9 d# ]9 Q2 \; X( b% V
% d3 J8 ] N# a: T+ l3 k; TNow, recap to your sample, the tubing is already considered fulfilled9 V2 A- o& ~7 }. h
with
* \8 [5 M0 ~! G- D' q. z: ]/ ?' {the basic insulation requirement. In order to provide sufficient5 h! P' J6 d# T7 N3 `6 G
insulation
7 e D/ W& Z$ w* R% y(double insulation) between the primary winding and secondary winding,
6 |! Z7 [4 X* d$ s1 ^additional insulation namely supplementary insulation (requirement same# a0 T4 A+ [ n# X+ L$ P. I& @
as
( z# P, E H5 @* Tbasic insulation) should be provided between the primary winding and that" G& G% m+ d( }4 T m
tubing's surface. It means that the creepage distance between the primary
* W6 u1 L1 G& C! `winding and that tubing's surface should be kept at least of 2.5mm.
: i+ u3 i, L; r7 UHowever,; b% t# n; L' M( O+ G% p+ o$ O
only 2.2mm measured at your sample. |
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