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UL1029a :
" Y9 X( I: l- V( i- E5 r5.3.2 Component abnormal conditions; b- |5 z" y; p& l; ]
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.
3 T& E d$ [( N5.3.2.3 The device under test was checked for fire hazards by observation, checked for ignition or
# `' M8 J( U: {6 p) Z6 l; Adripping of potting compound, and emission of flames or molten metal from the device enclosure." Z1 V+ N. T* k. c4 q5 u: j9 m3 W
2 m9 e+ c; O; i8 I* \0 w n
我的问题是：元件的短路是在灯点亮之前还是之后？ |
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