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UL1029a :% ~: U$ h4 H" z: `1 z
5.3.2 Component abnormal conditions
9 ~6 @, V( s/ W5.3.2.1 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./ }8 u8 {4 G+ R: [$ K
5.3.2.3 The device under test was checked for fire hazards by observation, checked for ignition or7 b" A! a' P5 c1 C8 v
dripping of potting compound, and emission of flames or molten metal from the device enclosure.
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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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