6. The following conditions that often occur can cause damage to the LED driver:
(1) The AC is connected to the DC output of the driver, causing the drive to fail;
(2) The AC is connected to the input or output of the DCs/DC drive, causing the drive to fail;
(3) The constant current output end and the tuned light are connected together, resulting in the drive failure;
(4) The phase line is connected to the ground wire, resulting in the drive without output and the shell charged;
7. Wrong connection of Phase line
Usually outdoor engineering applications are 3-phase four-wire system, with the national standard as an example, each phase line and 0 line between the rated operating voltage is 220VAC, phase line and phase line between the voltage is 380VAC. If the construction worker connects the drive input to two phase lines, the LED driver's input voltage is exceeded after the power is powered on, causing the product to fail.
8. The power grid fluctuation range beyond the reasonable range
When the same transformer grid branch wiring is too long, there are large power equipment in the branch, when the large equipment start and stop, the power grid voltage will fluctuate wildly, and even lead to instability of the power grid. When the instantaneous voltage of the grid exceeds 310VAC, it is possible to damage the drive (even if there is a lightning protection device is not effective, because the lightning protection device is to cope with dozens of uS level pulse spikes, while the power grid fluctuation may reach dozens of MS, or even hundreds of ms).
Therefore, street lighting branch power Grid has a large power machinery to pay special attention to, it is best to monitor the extent of the power grid fluctuations, or separate power grid transformer power supply.
9. Frequent tripping of lines
The lamp on the same road is connected too much, which leads to the overload of the load on a certain phase, and the uneven distribution of power between the facies, which causes the line to trip frequently.
10. Drive Heat Dissipation
When the drive is installed in a non-ventilated environment, the drive housing should be as far as possible in contact with the luminaire housing, if conditions permit, in the shell and the lamp shell on the contact surface coated with heat conduction glue or affixed heat conduction pad, improve the heat dissipation performance of the drive, thus ensuring the life and reliability of the drive.
