|
|
UL1029a :% m# Y2 k0 v. v; x1 ^+ k
5.3.2 Component abnormal conditions; u2 j; K! u3 U; K3 m7 i
5.3.2.1 For electronic devices, various semiconductors (solid state) components and electrolytic capacitors shall be shorted one at a time to determine there would be no fire hazard.5.3.2.2 If it can be determined by circuit inspection that some diodes would not cause a hazardous condition or a short would be the same as the “lamp open” condition previously conducted, the component need not be shorted. Components located in circuits that were capable of delivering more than 50 W of power are to be short-circuited or open circuited in turn. The locus (locations) of the 50 W points can be determined with the method described in the Standard for Fluorescent-Lamp Ballasts, UL 935.
, I$ m& Q$ C; E Q" h& }7 s5.3.2.3 The device under test was checked for fire hazards by observation, checked for ignition or4 I% o. q6 o2 [9 C g* I
dripping of potting compound, and emission of flames or molten metal from the device enclosure.
" e; y! g4 `7 B8 n, r0 t e h! Z
" o r8 O% J4 m; h) h7 x我的问题是：元件的短路是在灯点亮之前还是之后？ |
|
/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 2007-8-14 15:41
提升卡
置顶卡
沉默卡
喧嚣卡
变色卡
抢沙发
千斤顶
显身卡
发表于 2007-8-14 17:37
楼主