|
|
|  DSH 489
) f- F/ K% N, N; F+ D7 J; S% `/ N- q6 t* O: s$ z& E1 F
* \' [$ C. k% }( n" v4 | | Creepage distances, clearances and distances through insulation
" v K2 ]7 E7 K* G | 29.2
3 T4 g7 ~& M" [7 o | 60335-1(ed.3)6 p( a/ n: q+ P
|
& D& i5 ^4 Q# x7 U$ ]
Standard: IEC 60335-1:1991, 3rd Ed. U+ i3 y. \/ j/ N' j1 A( q9 G1 L
Sub clause: 29.26 ~$ u, a. n" M; s" Z. x" j7 B
Sheet No. DSH-489
9 l5 G/ ^3 G; k5 S* [Subject: Creepage distances, clearances and distances through insulation, y5 z, W6 N8 o% |0 B! h- c! z
Key words: - Distances through insulation - Thin sheet form layers
6 i# `/ k g( X* b9 U8 Z7 kDecision taken at the 40th CTL meeting 2003
: D! L! e7 H& c2 X* G, h. K: n2 {Question:2 j. q0 e1 M: }0 f
For the application of the test voltage, how are layers of insulation that are thermally bonded
& D5 Y4 R6 ~. a6 Dtogether treated?
8 a4 I+ y! J2 g' n% aRationale:( n2 }7 n) k; l6 ]- N
See question.
; C; s0 S0 \' T' t7 l" F) L5 UDecision:3 S A0 w8 |4 m6 y: O: {
Layers of insulation thermally bonded together are considered as one piece unless by the use
9 y8 v& o3 `; L) W# kof a microscope or any other appropriate means it is possible to determine the number of
: ?) [4 Y5 d. Q: O+ H7 jlayers. When the number of layers have been determined ( i.e. 2 for supplementary and 3 for6 X# F: d% D6 T8 x7 Q& M
reinforced insulation), the manufacturer is to supply separately the layers, or samples of! f; Q. a$ I& c. \2 E( Q5 o
material at various stages of the manufacturing process. The manufacturer shall also provide
6 _+ h2 |% M5 B/ \& b, }( revidence that the characteristics of the insulating material have not been degraded by the5 Y, s! g/ P3 F( b& h
bonding process.' p# t4 [! M; `
& @) m# p5 L7 ]. y' e
7 M: U& M4 D. A( e& C8 y7 `% a' f0 P( F4 b6 H7 {( Q4 n3 E
7 j3 @7 ^' u1 S6 e$ a, x) L, v
|
本帖子中包含更多资源
您需要 登录 才可以下载或查看，没有账号？注册安规
x
|
1/2 
|关于安规|小黑屋|安规QQ群|Archiver|手机版|安规网
( 粤ICP13023453-10 ) 
窥视卡
雷达卡
发表于 2012-9-11 14:14
提升卡
置顶卡
沉默卡
喧嚣卡
变色卡
抢沙发
千斤顶
显身卡