Outdoor  Residential  Led Street Lights Anti-LED Component Abnormal Test

1 Open the cover of the Outdoor Residential Led Street Lights, short-circuit a part of each group of LEDs (about half of the total number of series), and
The output circuit of the constant current drive circuit of the group of LEDs is connected in series with a DC ammeter to monitor the drive current.
The street light single lamp is installed in an environment with an ambient temperature of 25℃±5℃ and a relative humidity of 55%±5%R.H. according to normal use.
If the power supply voltage is 1.1 times the rated voltage and the frequency is the rated frequency power supply, if the group of LEDs is not short-circuited, the LEDs can still be positive.
Normally working, and the driving current value of these LEDs that can be lit does not exceed ±10% from the normal value before a part of the LED is not short-circuited.
If there is no abnormal change after continuous lighting for 4 hours, the further test in 6.4.5.2 can be carried out. If the group of LEDs is not short-circuited, the LEDs cannot
Normal operation, or the driving current value of these LEDs that can be lit is more than ±10% from the normal value before a part of the LED is not short-circuited,
The abnormal test of the LED street lamp is judged to be unqualified and the test ends.
2 For the samples that have passed the test of 1, all the LEDs of this group are short-circuited, that is, the LED street lights of this group are driven by constant current
The output terminal is short-circuited, then replace the face cover, power on for 4h according to the method in 1, and then remove the group of LEDs and restore the LED street light.
To the normal state, power on again. If the constant current drive circuit resumes normal operation and the drive current value of this group of LEDs is normal, it is judged
Set qualified. If the constant current drive circuit cannot resume normal operation after the short circuit of this group of LEDs is removed, or the drive current value of this group of LEDs
If the deviation from the normal value exceeds ±10%, the abnormal LED street lamp lifespan test is judged to be unqualified, and the test ends