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c) The luminaire shall be tested in the enclosure for a total duration of 168 h consisting of
8 ~ e5 S7 W1 s+ rseven successive cycles of 24 h. Supply voltage as specified in item d) below shall be, H' n1 ?- M" K1 E8 u7 H9 R
applied to the luminaire for the first 21 h and disconnected for the remaining 3 h of each6 @3 b7 C! I T- b) `
cycle. The initial heating period of the luminaire is part of the first test cycle.) e1 ^! ?6 ?$ h0 S2 S/ q
The circuit condition shall be as in normal operation for the first six cycles, and as in
% q3 m! d( c( D& m* Iabnormal operation (see Annex C) for the seventh cycle. For luminaires containing an( _' T- {6 d+ y, n1 S9 C M
electrical motor (e.g. a fan) the abnormal condition which most adversely affects the result
9 `6 e' N+ S$ {7 gof the test shall be selected.7 [5 e6 b3 @* G+ l0 G
For luminaires for which there is no abnormal condition test according to 12.5.1, the total
2 q$ H* H4 U. Q: C5 a& p" Mtest duration shall be 240 h (i.e. 10 x 24 cycles at normal operation). For filament; Y1 f/ C, A! E& G! @
luminaires, the total test duration of 240 h shall apply in all cases.' s( g) D7 ]. r/ 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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