|
c) The luminaire shall be tested in the enclosure for a total duration of 168 h consisting of
1 C u" O, b" |* s- Fseven successive cycles of 24 h. Supply voltage as specified in item d) below shall be/ ]) z* K. S* h% j9 i
applied to the luminaire for the first 21 h and disconnected for the remaining 3 h of each* \9 X0 A) C) |2 s& t9 r
cycle. The initial heating period of the luminaire is part of the first test cycle.3 T- J# I( N M' m @2 W0 w
The circuit condition shall be as in normal operation for the first six cycles, and as in
) M) X" ^& S' }abnormal operation (see Annex C) for the seventh cycle. For luminaires containing an
6 D9 P, o) y" ]% Yelectrical motor (e.g. a fan) the abnormal condition which most adversely affects the result
" e# X3 M) y, Q5 }' V" Cof the test shall be selected.* N* c+ ^ S/ b* c
For luminaires for which there is no abnormal condition test according to 12.5.1, the total z, v' o( n! c
test duration shall be 240 h (i.e. 10 x 24 cycles at normal operation). For filament6 Y. t8 V" x% ~7 l3 `1 K
luminaires, the total test duration of 240 h shall apply in all cases.& f+ i8 M/ R6 k; W' J
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! |
|