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c) The luminaire shall be tested in the enclosure for a total duration of 168 h consisting of
! o Q9 g! u& ^. Z# eseven successive cycles of 24 h. Supply voltage as specified in item d) below shall be
) K3 T! H8 L4 w& \applied to the luminaire for the first 21 h and disconnected for the remaining 3 h of each. \; F% u( F+ _2 R$ M
cycle. The initial heating period of the luminaire is part of the first test cycle.
. o9 K0 o$ | Q4 cThe circuit condition shall be as in normal operation for the first six cycles, and as in
# a* e: X2 p+ K. ]* b/ j: |abnormal operation (see Annex C) for the seventh cycle. For luminaires containing an
3 A' ^. H% N4 s* W7 _) welectrical motor (e.g. a fan) the abnormal condition which most adversely affects the result
2 i! K: z9 |/ wof the test shall be selected.( f, [/ f" `! u2 J S
For luminaires for which there is no abnormal condition test according to 12.5.1, the total
( _) ]2 v9 P" }) K+ f2 wtest duration shall be 240 h (i.e. 10 x 24 cycles at normal operation). For filament6 U1 f$ O( m( m, v
luminaires, the total test duration of 240 h shall apply in all cases.
6 l8 ]5 t0 a( H, O+ D3 Y7 l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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