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UL1029a :) V) n9 a6 b& Q7 I( f& J$ E/ a" B2 _
5.3.2 Component abnormal conditions
0 O0 r6 C+ i8 }# R% \& R5.3.2.1 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.
4 ^; B4 H' ]# ]+ O9 \5.3.2.3 The device under test was checked for fire hazards by observation, checked for ignition or
) w, E6 p U2 V' f: Q/ U- g- ?dripping of potting compound, and emission of flames or molten metal from the device enclosure.
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! H- a' j; T& ?5 ]$ b, E% b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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