UL1029a :
5.3.2 Component abnormal conditions
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.
5.3.2.3 The device under test was checked for fire hazards by observation, checked for ignition or
dripping of potting compound, and emission of flames or molten metal from the device enclosure.
我的问题是：元件的短路是在灯点亮之前还是之后？ |
发表于 2012-1-18 19:51:52
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