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c) The luminaire shall be tested in the enclosure for a total duration of 168 h consisting of- V0 U* F3 |. N( q0 U0 h8 S
seven successive cycles of 24 h. Supply voltage as specified in item d) below shall be
0 M. _4 }9 n# k1 o: h7 C& Wapplied to the luminaire for the first 21 h and disconnected for the remaining 3 h of each
3 U5 ]4 W5 Z/ X9 P0 Q% rcycle. The initial heating period of the luminaire is part of the first test cycle.* y' I2 M# g' p4 ^
The circuit condition shall be as in normal operation for the first six cycles, and as in
7 ]6 q% q; u8 e8 N4 t5 xabnormal operation (see Annex C) for the seventh cycle. For luminaires containing an
7 v n( i0 e9 N) f$ ]1 s% j/ Zelectrical motor (e.g. a fan) the abnormal condition which most adversely affects the result3 P* X: K1 {* ~$ @, c4 k* \, D
of the test shall be selected.
+ W% d. Q8 I% N. B' c% N+ k: JFor luminaires for which there is no abnormal condition test according to 12.5.1, the total0 P" X! R% W* B; v j. @
test duration shall be 240 h (i.e. 10 x 24 cycles at normal operation). For filament! ?7 x( s: P B
luminaires, the total test duration of 240 h shall apply in all cases.% E+ ?5 Q. @1 V- 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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