|
楼主 |
发表于 2010-8-20 14:55
|
显示全部楼层
c) The luminaire shall be tested in the enclosure for a total duration of 168 h consisting of, M: P1 x: ]7 U. E' ^$ e7 ?
seven successive cycles of 24 h. Supply voltage as specified in item d) below shall be- u, u# G1 Q" S
applied to the luminaire for the first 21 h and disconnected for the remaining 3 h of each- E5 G: b. k# e- h& _
cycle. The initial heating period of the luminaire is part of the first test cycle.
/ g2 [; Z/ q* |+ |! W) T( rThe circuit condition shall be as in normal operation for the first six cycles, and as in
0 j3 c4 a+ b8 P. L8 Iabnormal operation (see Annex C) for the seventh cycle. For luminaires containing an
" ^% X# j! g7 f) _5 w' h! J# lelectrical motor (e.g. a fan) the abnormal condition which most adversely affects the result2 G Z1 p% r ]" ]5 U i# G
of the test shall be selected.# g3 S S+ `% ^; x
For luminaires for which there is no abnormal condition test according to 12.5.1, the total
% ], o! H! G1 Ltest duration shall be 240 h (i.e. 10 x 24 cycles at normal operation). For filament4 p0 x3 S+ q4 l5 T5 m. U5 e
luminaires, the total test duration of 240 h shall apply in all cases.' F6 c3 I2 e) \: p2 @
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! |
|