|
UL1029a :* ^- a9 \; o9 B
5.3.2 Component abnormal conditions* |4 i; ~, b; y. B
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, P* J- P. s9 u- d7 R3 D
5.3.2.3 The device under test was checked for fire hazards by observation, checked for ignition or( z9 i3 _+ \3 |* Z. P4 W) E
dripping of potting compound, and emission of flames or molten metal from the device enclosure.2 ^" R: z- D E
' M% e0 T8 e1 y; v+ W6 I3 M
我的问题是:元件的短路是在灯点亮之前还是之后? |
|