|
|
楼主 |
发表于 2013-6-26 13:43
|
显示全部楼层
The LED module shall be switched on and the power monitored (at the input side) and. X: L! `6 `0 J+ e$ W) @. h' t
increased until 150 % of the rated voltage, current or power is reached. The voltage or the
M6 j7 k, x% s }6 Mcurrent shall be increased until 150 % of the rated power is reached. The test shall be
Z4 W' v3 e3 K- k' ?1 Ucontinued until the LED module is thermally stabilised. A stable condition is reached, if the
) D$ I2 E( G7 Itemperature does not change by more than 5 K in 1 h. The temperature shall be measured in, Q0 E8 L0 i: V+ U4 V
the tc point. The LED module shall withstand the overpower condition for at least 15 min, the
8 r4 G/ `0 H3 E& ~) v8 T0 ~time period of which can lie within the stabilisation period if the temperature change is ≤ 5K.6 Q; |1 R4 N% b" B c
4 h5 o) T+ d: T! Y \4 ]If the module contains an automatic protective device or circuit which limits the power, it is
1 c3 ]1 |: A; `; `/ Z- M* J' tsubjected to a 15 min operation at this limit. If the device or circuit effectively limits the power
# `4 K( e( `# S8 s3 b# s! E0 a* ?over this period, the module has passed the test, provided the compliance (4.1 and last% {+ m5 g8 [& s' ?+ K
paragraph of 13.2) is fulfilled.
& V5 o5 n8 X B5 jAfter finalising the overpower mode, the module is operated under normal conditions until& c D6 }9 U$ R
thermally being stable.- i, |, X; H7 I. l& _6 n3 o
A module fails safe if no fire, smoke or flammable gas is produced and if the 15 min' B& {" H# O, N* G; s9 Z" L9 b/ @( y
overpower condition has been withstood. To check whether molten material might present a
0 J) e6 ]5 ]5 Z, U: y+ b' lsafety hazard, a tissue paper, as specified in 4.187 of ISO 4046-4, spread below the module; f" y% }1 p/ X! r
shall not ignite. |
|
/2 
|关于安规|小黑屋|安规QQ群|Archiver|手机版|安规网
( 粤ICP13023453-10 ) 
窥视卡
雷达卡
发表于 2013-6-26 09:21
显身卡
