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楼主 |
发表于 2013-6-26 13:43
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The LED module shall be switched on and the power monitored (at the input side) and
: r' F; Y; }; q( N( s* Aincreased until 150 % of the rated voltage, current or power is reached. The voltage or the
, Q$ _0 o& ^" T3 icurrent shall be increased until 150 % of the rated power is reached. The test shall be+ J, P7 k+ K. q/ ?
continued until the LED module is thermally stabilised. A stable condition is reached, if the
2 |) c4 c2 {5 I$ mtemperature does not change by more than 5 K in 1 h. The temperature shall be measured in
( a0 f) a3 v) K( V% K( e1 x+ hthe tc point. The LED module shall withstand the overpower condition for at least 15 min, the
# X/ q6 r0 J, P. z. Wtime period of which can lie within the stabilisation period if the temperature change is ≤ 5K.2 g6 N9 z" m. M1 g; n% A' D
# G# R( L1 X& RIf the module contains an automatic protective device or circuit which limits the power, it is
0 r/ A& ~ ]( ?subjected to a 15 min operation at this limit. If the device or circuit effectively limits the power
# r3 P- F7 X& Pover this period, the module has passed the test, provided the compliance (4.1 and last0 S: z. G& V+ R% d$ z4 K8 n( \3 n
paragraph of 13.2) is fulfilled.. |, n" w8 l0 R# i: m1 l. _2 z
After finalising the overpower mode, the module is operated under normal conditions until4 C7 E9 A5 u1 A. i9 z/ c
thermally being stable.
" Q; `9 F' p2 ~$ A6 tA module fails safe if no fire, smoke or flammable gas is produced and if the 15 min
2 M; u* {3 _3 G9 r( w% Zoverpower condition has been withstood. To check whether molten material might present a* u9 `& M7 d" [' u* L# z6 Y! l5 Y q
safety hazard, a tissue paper, as specified in 4.187 of ISO 4046-4, spread below the module7 d6 J8 }6 z" G: e! `: y
shall not ignite. |
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