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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:
$ @0 p% c) i7 d! I, Q: BAccording to sub-clause 8.9, a single layer of PTFE insulation having
0 I& i8 a" H: R$ [: C0 d' J* }) L0.24mm
* h4 g, L& E3 e/ J( a% u6 h(min.) is considered to fulfill the basic insulation requirement.
0 H% V6 K0 m5 d/ R9 ~4 z: F
* K) c# Z; z; G9 Y( f. X% h5 J" sNow, recap to your sample, the tubing is already considered fulfilled
7 X& V! a9 |1 dwith( w4 q _; d. [0 t" _: W/ n* V# k
the basic insulation requirement. In order to provide sufficient
2 O+ i$ f- H* k' y" linsulation1 |" T& Y/ P {3 x7 R. d- T
(double insulation) between the primary winding and secondary winding,
$ u- y) k1 S/ c7 Q, z6 J oadditional insulation namely supplementary insulation (requirement same' N5 f1 X$ e0 `7 R) h
as
3 z) ?2 a# r* n5 D: l2 O" ebasic insulation) should be provided between the primary winding and that& p4 y/ S/ i% V3 v. ^
tubing's surface. It means that the creepage distance between the primary {+ a' H3 P$ I+ Q3 j/ R
winding and that tubing's surface should be kept at least of 2.5mm.1 D9 S. Y! u7 N
However,
/ `9 q, ?2 R2 {3 `3 ^$ monly 2.2mm measured at your sample. |
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