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c) The luminaire shall be tested in the enclosure for a total duration of 168 h consisting of
$ o/ P1 w7 b/ h8 Mseven successive cycles of 24 h. Supply voltage as specified in item d) below shall be1 C7 v4 d1 B; D1 W' ^, O
applied to the luminaire for the first 21 h and disconnected for the remaining 3 h of each
2 P- f( P# _, ^/ Q/ c. j/ Kcycle. The initial heating period of the luminaire is part of the first test cycle.2 ]0 l9 y2 x$ v& S; i
The circuit condition shall be as in normal operation for the first six cycles, and as in S& Q( ?5 R2 c7 b3 a4 s
abnormal operation (see Annex C) for the seventh cycle. For luminaires containing an
' P0 w+ P' l' e# \" ~0 melectrical motor (e.g. a fan) the abnormal condition which most adversely affects the result9 u! c( w/ s/ [- q0 z
of the test shall be selected.
! B2 z+ M/ _& Q' R% Y0 y V4 C4 ^For luminaires for which there is no abnormal condition test according to 12.5.1, the total1 J2 ^( D; v7 G$ a' X# X' t- u
test duration shall be 240 h (i.e. 10 x 24 cycles at normal operation). For filament
6 G9 q" r, u6 l6 n1 s4 V- Fluminaires, the total test duration of 240 h shall apply in all cases.' r" z4 J# l5 b; e- m* X
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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