DSH 1066_IEC 60730-1

chinatown

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

1 u9 P& i' X- S7 S7 n
1) In case of components mounted on a printed wiring board (PWB) and placed across safety
insulation (e.g. reinforced insulation), how to deal with different requirement both for printed wiring
$ d' _/ C  D5 P8 gmaterial and different group of materials?
+ d/ Q8 B; _9 m2) In case of components mounted on a printed wiring board (PWB) and placed across safety
insulation (e.g. reinforced insulation), how to deal in case of different material group for PWB and
components placed on it (e.g. PWB of material group I and relay base of material group IIIa)?
& C& i7 m0 m8 P' t7 T6 v$ V& R
Decision
1) Column relevant to printed wiring material in micro-environment of pollution degree 1 and 2 can
$ Q! K4 P& s. `& Eonly be used when there are no components placed on the PWB, across the investigated insulation.
: E# G  r9 e7 x5 T) \+ A. v2 FIn this case, the column showing the worst case has to be used.
& H" `7 v3 m0 u. a5 O5 l2) In case of different material group both for PWB and components, column showing the worst case
6 D/ w, G! _1 g6 }8 |% u+ Whas to be used.
4 {0 y0 j* |" DRemark: For the scope of these decisions, a component is considered to be in contact with the PWB
if the surface of the component is located at a distance less than the “X” value indicated in table of
2 j5 j2 ^( {; P2 r6 [  H* F4 cannex B. See enclosed drawings
. Y3 \) r8 z5 g# v/ `  u3 K4 j
) n. \% J1 s: m