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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:, y% y: {" y+ n7 s9 P# J. j
According to sub-clause 8.9, a single layer of PTFE insulation having
" T/ M" \* j4 J8 s0.24mm
( L! ]# W- j6 Y. T3 V z/ X(min.) is considered to fulfill the basic insulation requirement.
$ e+ C4 E1 d+ Y/ v6 s$ i6 y6 F1 a' x6 m
Now, recap to your sample, the tubing is already considered fulfilled
- Y' D# H9 a+ }with( L& j0 c' c, V, K0 h. |, G
the basic insulation requirement. In order to provide sufficient4 l& l" C: N7 m6 `
insulation+ i6 i% @: F. B7 U' ?, i6 b* d" T
(double insulation) between the primary winding and secondary winding,+ m" `/ {5 l2 C p1 q+ s& r# \
additional insulation namely supplementary insulation (requirement same |- [1 g) m, ^5 e7 ]- }3 k
as& L1 V8 m; J. F( E6 B1 X( N
basic insulation) should be provided between the primary winding and that
: b' ]3 O, w+ [ btubing's surface. It means that the creepage distance between the primary: o' Z( S! W1 Q j9 R4 u N9 Q
winding and that tubing's surface should be kept at least of 2.5mm.- Y$ q9 P+ R6 d! M/ e5 H8 c; H
However, i- s+ F# c6 [# X' v o
only 2.2mm measured at your sample. |
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