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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' l, ^! ?. G% E: m6 m& n" P
seven successive cycles of 24 h. Supply voltage as specified in item d) below shall be9 U& ]3 {1 S h5 b$ K3 B# {
applied to the luminaire for the first 21 h and disconnected for the remaining 3 h of each4 C, L* J4 K4 r
cycle. The initial heating period of the luminaire is part of the first test cycle.8 f. o. `! k. H, h- t7 H
The circuit condition shall be as in normal operation for the first six cycles, and as in# v. L- o9 ]2 h9 u, W
abnormal operation (see Annex C) for the seventh cycle. For luminaires containing an6 y) x7 n- f, G& G# {( R5 I3 f- `
electrical motor (e.g. a fan) the abnormal condition which most adversely affects the result
% s: n0 S4 p7 ]' \, \5 t$ Jof the test shall be selected.
6 `* y+ p$ P J% Y y) J: YFor luminaires for which there is no abnormal condition test according to 12.5.1, the total: C# Y7 Q% k* ]/ M) F' P' _
test duration shall be 240 h (i.e. 10 x 24 cycles at normal operation). For filament
' K3 `% |3 U7 K3 G" Z' L( gluminaires, the total test duration of 240 h shall apply in all cases.' S' {9 J5 e) N0 ?7 k
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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