|
|
|  DSH 7145 k" C" {5 B/ H+ [ ]5 y5 P
" B1 `. p, X9 m* r | Application of tracking test9 d3 I2 I" _9 ]9 g4 M0 q
| 29.2, G* O& x. m( H0 S* ]
| 60335-1(ed.4)0 ^- Q* [) f( V4 e* y7 b# X: I" h* {
|
$ q5 X# Q% P" o, @6 Z$ S
Question:7 [* }, u, ~8 o3 \- g+ t) \" y' Z
It is stated in clause 29.2 of IEC 60335-1 that insulating material in connection with required creepage distances has to be of material group I, II, IIIa or IIIb.( m e* q6 F" x/ J9 Z8 \% O' g
For example, there may be 10 different relevant materials in a simple motor, all of which have to be tested unless the materials are already separately certified for CTI. Often we hear from customers that they have to deliver certificates or special prepared test
4 J( S3 t0 z/ vsamples in case the parts are not satisfactory for testing, due to size or shape.
" G# d# Q1 q) H2 ]; k* l0 n/ eIs it always necessary to verify that the material group is at least of material group IIIb.?( R3 l9 ?' l2 \! Z8 N
Decision:% {* m0 U' s: b$ o0 u! O' y
Yes, it is always necessary to verify that the material group is at least of group IIIb.9 a [ M [; y; g1 R7 u
. O! E4 Q" c4 p+ Q3 H6 D8 k
! z, P. h' B( y. w' F" v& m |
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 
|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 2012-9-8 13:10
提升卡
置顶卡
沉默卡
喧嚣卡
变色卡
抢沙发
千斤顶
显身卡