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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: R9 d; N4 t4 z8 U3 T& W/ A
seven successive cycles of 24 h. Supply voltage as specified in item d) below shall be
5 I0 V! M- q$ q1 qapplied to the luminaire for the first 21 h and disconnected for the remaining 3 h of each+ Q( u& ?4 | u @" V7 X" i$ z
cycle. The initial heating period of the luminaire is part of the first test cycle.
# M% g' {# S# q5 {5 MThe circuit condition shall be as in normal operation for the first six cycles, and as in8 T* A2 U) E/ j! x- T8 d9 o9 l
abnormal operation (see Annex C) for the seventh cycle. For luminaires containing an4 j1 }1 D# O# Z* B2 w. q. @
electrical motor (e.g. a fan) the abnormal condition which most adversely affects the result
$ m: Q- W) G. c& V9 `of the test shall be selected.7 j' E4 ^' c4 q* v
For luminaires for which there is no abnormal condition test according to 12.5.1, the total
& r9 Z7 r$ B e q5 i# y& Ztest duration shall be 240 h (i.e. 10 x 24 cycles at normal operation). For filament! p1 N4 n$ ^- {' E0 `
luminaires, the total test duration of 240 h shall apply in all cases.
. V& i. I9 u }# j+ }0 D- t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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