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c) The luminaire shall be tested in the enclosure for a total duration of 168 h consisting of5 {- | K' y/ m+ U) R9 c. T `( H
seven successive cycles of 24 h. Supply voltage as specified in item d) below shall be# G1 |" K9 ?% U
applied to the luminaire for the first 21 h and disconnected for the remaining 3 h of each. ^. W( [2 q8 H/ W
cycle. The initial heating period of the luminaire is part of the first test cycle.$ I6 M/ z! B% K5 ^9 k/ w8 n
The circuit condition shall be as in normal operation for the first six cycles, and as in; i) L) q2 r! \9 q5 }0 u
abnormal operation (see Annex C) for the seventh cycle. For luminaires containing an+ f* {0 p5 {4 D$ ~# ?* t
electrical motor (e.g. a fan) the abnormal condition which most adversely affects the result
( _* E* r/ z2 Z( oof the test shall be selected.% C5 Y! S6 U2 G" e/ Z
For luminaires for which there is no abnormal condition test according to 12.5.1, the total! P6 k2 K% x$ f) s' c8 X
test duration shall be 240 h (i.e. 10 x 24 cycles at normal operation). For filament" |" F( ?1 P9 G5 q# S5 x
luminaires, the total test duration of 240 h shall apply in all cases.
! Y% c5 a/ X' e n& h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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