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c) The luminaire shall be tested in the enclosure for a total duration of 168 h consisting of, M1 R' P) J4 f( q: H5 o L
seven successive cycles of 24 h. Supply voltage as specified in item d) below shall be
! N# O9 \2 v+ J+ G& capplied to the luminaire for the first 21 h and disconnected for the remaining 3 h of each: v1 B3 L4 V6 @, `1 e
cycle. The initial heating period of the luminaire is part of the first test cycle.
4 Q. z/ f. M8 p* s3 [The circuit condition shall be as in normal operation for the first six cycles, and as in
) `* v/ u. V. k1 _' b! r9 `abnormal operation (see Annex C) for the seventh cycle. For luminaires containing an
3 i$ C7 N( Q) }- w. Pelectrical motor (e.g. a fan) the abnormal condition which most adversely affects the result4 r: A) K9 k8 z6 ]
of the test shall be selected. T9 U0 ?& ^4 J9 D4 W1 j
For luminaires for which there is no abnormal condition test according to 12.5.1, the total/ J, q, p! j4 ^; ?/ y
test duration shall be 240 h (i.e. 10 x 24 cycles at normal operation). For filament& y- q5 A J0 H3 i
luminaires, the total test duration of 240 h shall apply in all cases.$ Z1 t( V. p( f2 F% z8 \, [ P* g" ^
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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