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楼主 |
发表于 2010-8-20 14:55
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c) The luminaire shall be tested in the enclosure for a total duration of 168 h consisting of% @4 F# L$ g# D' r) M$ r1 b
seven successive cycles of 24 h. Supply voltage as specified in item d) below shall be
% l2 H: z/ j- `, [/ d8 c5 zapplied to the luminaire for the first 21 h and disconnected for the remaining 3 h of each' A% q# x: G, s- t `
cycle. The initial heating period of the luminaire is part of the first test cycle.
3 I3 S& y' n# M/ WThe circuit condition shall be as in normal operation for the first six cycles, and as in
, a# C8 G6 {$ ^$ Nabnormal operation (see Annex C) for the seventh cycle. For luminaires containing an
: F" T/ ]: Y1 H ]6 Y' K' pelectrical motor (e.g. a fan) the abnormal condition which most adversely affects the result
" T/ C; o# E1 vof the test shall be selected., E! z& ^ Z: C4 |9 F! z
For luminaires for which there is no abnormal condition test according to 12.5.1, the total% Q4 ~9 A! T) }
test duration shall be 240 h (i.e. 10 x 24 cycles at normal operation). For filament
2 ^8 x$ k9 S' H( s* W+ Aluminaires, the total test duration of 240 h shall apply in all cases.- m/ [5 I2 `1 p! q) n3 j
标准的语句我拷下来了。最后一段的意思实在是没法理解,特别是最后一句,用灯丝灯泡的灯具要怎么做耐久?还请高手解惑。谢谢! |
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