|
|
|  DSH 489
, F4 y, {1 y6 ~/ a" r! X5 R) l) c% U+ E; C' Y4 t& h
5 ?0 B4 b0 H) D/ P) t | Creepage distances, clearances and distances through insulation
( Q: Y& E. i5 d- P3 ^ | 29.2/ z2 T2 G2 q2 i7 _
| 60335-1(ed.3)
' c t3 E9 _$ w' t6 E2 G |
; N2 W2 ]( z, V* E0 `( N
Standard: IEC 60335-1:1991, 3rd Ed.- L2 t- g# n/ o1 h8 R9 I+ e
Sub clause: 29.23 O) I: b+ s# s' z3 O& c
Sheet No. DSH-489) I2 S5 D$ E. _+ S3 b; O: V
Subject: Creepage distances, clearances and distances through insulation" z, s Q1 u; v/ z
Key words: - Distances through insulation - Thin sheet form layers
9 B1 i$ J& `# F: n) z: J, t. LDecision taken at the 40th CTL meeting 2003
0 V+ E; [4 L0 v O/ UQuestion:& g3 ^( Z& p. N- z9 p& n
For the application of the test voltage, how are layers of insulation that are thermally bonded
% s% ^' F' l' w6 f$ E6 Vtogether treated?
9 C. U: X% e6 F4 Q$ E0 gRationale:% d4 ^3 o7 m: u" I; P5 l2 W
See question.
\# W9 B7 q9 Q0 F1 c3 lDecision:
; O3 w- @8 Y0 N( u# WLayers of insulation thermally bonded together are considered as one piece unless by the use
+ Y0 c) t w+ E1 x/ Lof a microscope or any other appropriate means it is possible to determine the number of, |8 K4 z3 o; H* |
layers. When the number of layers have been determined ( i.e. 2 for supplementary and 3 for" x0 g3 U, z y
reinforced insulation), the manufacturer is to supply separately the layers, or samples of1 h# X) \! {* D/ [4 o( [0 T- i
material at various stages of the manufacturing process. The manufacturer shall also provide' G0 e' _" x! Y9 H
evidence that the characteristics of the insulating material have not been degraded by the
, e: G) D& i/ {0 sbonding process. u3 h, h; W7 @ R# ~
; e& D. D; [* n0 l) M
) s8 K. ]5 e( W6 w
' ]' I7 [ \9 }! _% D' a
8 y: h% G/ T" U3 ? |
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 2012-9-11 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