|
|
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- g) D9 B: O7 O9 V
increased until 150 % of the rated voltage, current or power is reached. The voltage or the
7 u. S- k4 b* }/ w$ Dcurrent shall be increased until 150 % of the rated power is reached. The test shall be0 |: B. j( g: T
continued until the LED module is thermally stabilised. A stable condition is reached, if the
- k7 R5 C+ t: \8 otemperature does not change by more than 5 K in 1 h. The temperature shall be measured in
2 T4 q) v0 s6 J- w( m2 Y' r# Dthe tc point. The LED module shall withstand the overpower condition for at least 15 min, the8 E6 s7 P# F( v3 i* A9 X
time period of which can lie within the stabilisation period if the temperature change is ≤ 5K.
1 X; ]7 m$ C5 R* U3 L- Q. \6 l& p! c$ i2 u0 |, m! W5 Z) ~3 a
If the module contains an automatic protective device or circuit which limits the power, it is
0 w" F. _/ q- u4 s$ N2 m3 Tsubjected to a 15 min operation at this limit. If the device or circuit effectively limits the power8 G- H! u* u' I1 O
over this period, the module has passed the test, provided the compliance (4.1 and last0 x5 ]+ d( J, R6 O: m4 z: H" ^1 ?
paragraph of 13.2) is fulfilled.
5 K4 C3 s6 m. |7 l. }After finalising the overpower mode, the module is operated under normal conditions until- w: C9 l- c. f9 H
thermally being stable.
$ p7 ?9 B& N7 w4 h- ZA module fails safe if no fire, smoke or flammable gas is produced and if the 15 min) K) {; X. n/ R, \' h: V2 v# ]$ g
overpower condition has been withstood. To check whether molten material might present a3 D# v! _6 B9 t) E4 D& m) d/ q
safety hazard, a tissue paper, as specified in 4.187 of ISO 4046-4, spread below the module6 I; s4 R _: D* e O
shall not ignite. |
|
|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