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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:8 |" N6 i8 _0 L
According to sub-clause 8.9, a single layer of PTFE insulation having! ~1 [1 r, V: ~4 u5 x4 c, D4 r
0.24mm
. u# J0 e7 ^0 L+ B: y' d(min.) is considered to fulfill the basic insulation requirement.
# T( d0 q$ T; J% E. F; S E6 u, y, U; P* r
Now, recap to your sample, the tubing is already considered fulfilled' V. u. I5 m' {% W' M' w4 h9 o
with# v5 y9 v; z- R6 G2 k
the basic insulation requirement. In order to provide sufficient
2 s4 W: ~( C' k0 U9 }( ^3 uinsulation
& U" S4 c$ I" x" Y* U(double insulation) between the primary winding and secondary winding,
+ ~/ y. v6 t6 n! n& @5 Jadditional insulation namely supplementary insulation (requirement same
' v- m- ~' m! Jas) q6 |$ H) J* W
basic insulation) should be provided between the primary winding and that+ f: h- O8 S& A& L. |4 {% A3 T. l( C+ \
tubing's surface. It means that the creepage distance between the primary
0 w( {1 j5 w* G' Y" S) W4 U& k8 mwinding and that tubing's surface should be kept at least of 2.5mm./ m$ H' \. J; S% k
However,$ s; u, Y$ B) X0 e) h: T
only 2.2mm measured at your sample. |
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