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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:7 |5 ?4 P8 U! H% k
According to sub-clause 8.9, a single layer of PTFE insulation having
8 @/ q2 z% H+ Z( \0.24mm
) L2 b1 }" z% D3 v2 k(min.) is considered to fulfill the basic insulation requirement.
% b7 V/ z7 R( I* d2 X' M
( l: T+ [ h* U6 c' q# E" qNow, recap to your sample, the tubing is already considered fulfilled
- |) v5 A. P4 S9 }$ nwith
( _* C, @$ M6 N8 ^6 ?the basic insulation requirement. In order to provide sufficient
9 S% z1 A R+ S6 J, finsulation0 [ W5 _ L' J9 p; \* B
(double insulation) between the primary winding and secondary winding," M0 F+ Z8 t+ D4 W. k, Y
additional insulation namely supplementary insulation (requirement same$ ]1 t4 f& c2 L+ \) F
as0 I4 l/ W/ m. n9 n4 G& g3 O
basic insulation) should be provided between the primary winding and that5 f+ ~4 l# U' t* p. k6 ~7 h
tubing's surface. It means that the creepage distance between the primary
) |/ a4 [$ F7 K7 V; i; q+ c5 E& b8 qwinding and that tubing's surface should be kept at least of 2.5mm." ~$ ^. h1 O3 z% U: g1 a% R/ B
However,
7 p3 a+ j5 p9 |% Donly 2.2mm measured at your sample. |
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