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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:
, ~$ m! Y; B! v+ k, gAccording to sub-clause 8.9, a single layer of PTFE insulation having
! e; i s* l% A1 R' h- K$ G0.24mm+ W2 e% W9 l+ d& _* ^4 K
(min.) is considered to fulfill the basic insulation requirement.
' l+ ]# {; j& ~# F; c% H# p
' y! ? A- g. G( r [Now, recap to your sample, the tubing is already considered fulfilled; Q% i8 m* P8 V7 i
with
$ [8 q, \. }4 L- \the basic insulation requirement. In order to provide sufficient2 P; u+ _. K" G9 ?/ [2 ^- f
insulation
% r, K* ^. q$ x! x(double insulation) between the primary winding and secondary winding,+ q( n9 Q* h/ u' |0 B) c" t9 \
additional insulation namely supplementary insulation (requirement same* e3 N2 d. E7 ~
as
' @/ q7 E5 V3 z& ?1 W9 pbasic insulation) should be provided between the primary winding and that
: k/ j+ H1 t; Q+ Gtubing's surface. It means that the creepage distance between the primary& v0 j v% G; ^- l
winding and that tubing's surface should be kept at least of 2.5mm.# z: E5 J2 H' B! @/ f' |# g& G
However,
+ Q/ P6 h" _" K3 C( Aonly 2.2mm measured at your sample. |
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