|
|
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
- `$ v; t# D3 a$ zincreased until 150 % of the rated voltage, current or power is reached. The voltage or the
t1 B$ p/ L, n0 O1 _current shall be increased until 150 % of the rated power is reached. The test shall be* C* g" R: x& a
continued until the LED module is thermally stabilised. A stable condition is reached, if the
- c# e5 S: C" S( rtemperature does not change by more than 5 K in 1 h. The temperature shall be measured in% o# z, j$ L, ?4 ]) G* e# }
the tc point. The LED module shall withstand the overpower condition for at least 15 min, the1 }6 }3 r5 l' k- J' j3 d3 E0 m
time period of which can lie within the stabilisation period if the temperature change is ≤ 5K.
% N9 ]1 I7 q+ [ U0 p* x& h% S* [: u/ J& S v2 V+ W1 d
If the module contains an automatic protective device or circuit which limits the power, it is
( m8 z: J8 ]( ~7 k: e2 @: Rsubjected to a 15 min operation at this limit. If the device or circuit effectively limits the power0 ]$ n. Y) E' ^- ]% W7 A# V
over this period, the module has passed the test, provided the compliance (4.1 and last
% B6 C" D* e cparagraph of 13.2) is fulfilled.5 [( k% f: L) M+ r8 a
After finalising the overpower mode, the module is operated under normal conditions until6 N3 [4 N0 ?+ n7 C
thermally being stable.# s- D0 V; S l# h% F6 E' G
A module fails safe if no fire, smoke or flammable gas is produced and if the 15 min7 e6 F) V. G( {( v$ C
overpower condition has been withstood. To check whether molten material might present a5 a" Y& S* d6 M) q. M; O
safety hazard, a tissue paper, as specified in 4.187 of ISO 4046-4, spread below the module$ [) X. C2 v. Q, D3 J7 Q+ B
shall not ignite. |
|
/1 
|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
