DSH 489 Creepage distances, clearances and distances through insulation

小米

广东安规检测
有限公司提供：

小型摆管淋雨试验机

IPX5X6X7喷水试验机

1000L恒温恒湿箱

各种试验指现货

可程式恒温恒湿试验箱

水平垂直燃烧机

自动卷线器试验机

耐划痕试验机

各种灯头量规现货

灼热丝试验机现货

GB1002插头量规

IPX1-X7淋雨现货

IEC61347/UL935镇流器热试验箱

灯具防风罩

IK冲击试验机

UL498插头插座量规

VDE0620插头插座量规

稳定性试验台

家电温升测试角

针焰试验机现货

热电偶焊机现货

家电125mm试验指

E12灯头量规

无绳壶无绳电熨斗插拔寿命试验机

IEC60335试验指甲

DSH 489 : i' a( e. K* _ 2 j- h' a7 |6 t$ O* c

Creepage distances, clearances and distances through insulation   d* J/ {) a& Y

29.2 / I7 k" w. c0 y( m$ U& B

60335-1(ed.3) # y1 {  Y/ {& }

Standard: IEC 60335-1:1991, 3rd Ed.
Sub clause: 29.2
( A9 m' a3 g: S& u& gSheet No. DSH-489
# `$ F  n! x+ ^' k2 Z; _" \Subject: Creepage distances, clearances and distances through insulation
! ^& ~7 g2 \: b2 aKey words: - Distances through insulation - Thin sheet form layers
Decision taken at the 40th CTL meeting 2003
; {" [2 ^8 O% hQuestion:
$ @: |( Y( a% A" zFor the application of the test voltage, how are layers of insulation that are thermally bonded
together treated?
7 i& k7 l+ b( ?. f! N# |+ sRationale:
See question.
; S( A7 C: E9 a5 g" [. F' [Decision:
Layers of insulation thermally bonded together are considered as one piece unless by the use
7 j2 ?) J. {* J1 iof a microscope or any other appropriate means it is possible to determine the number of
layers. When the number of layers have been determined ( i.e. 2 for supplementary and 3 for
, J( P8 j+ P9 H/ Q9 u$ L' \0 oreinforced insulation), the manufacturer is to supply separately the layers, or samples of
( E/ _: a1 x# ?material at various stages of the manufacturing process. The manufacturer shall also provide
- v  ?) i, n7 {8 d5 V' ^& ~9 a* V4 Fevidence that the characteristics of the insulating material have not been degraded by the
5 P, x: [6 R: a. J9 J3 Z4 Obonding process.
% D$ }0 Q, x; W8 D
9 S2 s2 `9 T4 d+ p+ ^  d; K, m
* ~0 ]- n/ V" ^7 b