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c) The luminaire shall be tested in the enclosure for a total duration of 168 h consisting of
7 I' h, o' ?% N5 useven successive cycles of 24 h. Supply voltage as specified in item d) below shall be! @- y# U! O4 [& \! _ I
applied to the luminaire for the first 21 h and disconnected for the remaining 3 h of each
; [ {0 D {, x; t' `: x- O" Gcycle. The initial heating period of the luminaire is part of the first test cycle.
7 D2 G# f: ^8 v5 O3 ~# \The circuit condition shall be as in normal operation for the first six cycles, and as in2 m3 e/ V* y' B# T( q# v$ e( X: {
abnormal operation (see Annex C) for the seventh cycle. For luminaires containing an: V/ Y- i, ]( T7 o; {) N* b
electrical motor (e.g. a fan) the abnormal condition which most adversely affects the result2 u8 j: \* ?$ X. l1 G
of the test shall be selected.
2 `6 I! H. ^- W8 _) e z* ZFor luminaires for which there is no abnormal condition test according to 12.5.1, the total9 Z) e" O4 h( o, u) k; ~0 b
test duration shall be 240 h (i.e. 10 x 24 cycles at normal operation). For filament# R7 a# h$ \2 k3 t
luminaires, the total test duration of 240 h shall apply in all cases.' C8 W9 V j/ w" A
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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