Are you referring to the +1000 ma output to the LEDs? If so I have reduced output to 975 ma. I am also dimming them up and not just full on. Please post a link to the write-up about the problem.
Maik1
Here is an excellent explanation of the issue as described by KCRESS (a very knowledgeable member of the DIY LED threads):
"To answer your PFC question. The Meanwell 60-48D has just diodes on the front-end that charge a capacitor. Capacitors store energy with voltage. What happens is the capacitors charge up to some level and operation begins. Every power line cycle which varies from 170V to -170V can only add power back to the capacitor, (that is continuously drained by running the LEDs), when the absolute value of the voltage exceeds whatever the drained down voltage of the capacitor is at that moment.
This means the power can only be gotten from the outlet in tiny sporadic gulps. Those gulps are large sudden current spikes because all the energy needed by the system has to come in those tiny gulps.
Those gulps can be 10A even though the name plate states 1A or 0.5A. That's because the name plate shows the average current. When you stack up a pile of these things you may have 300A pulses being drawn from your outlet even though the average current is only 10A.
The heating in your breakers and wiring and outlets is only a function of I-squared R. Which means the heating is very sensitive to the current I. Your wiring is set up for "average" current not these repetitive pulses.
In most cases you won't have a problem - you'll get away with it. Your wiring will be running hotter than predicted by the average current values listed on the Meanwells. If you have no weaknesses (today) like a bad connection in your house wiring you probably won't have an issue.
As for the startup problem with the inrush the inrush listed only occurs when you power-on the MW and the power line voltage which cycles, as stated above, is at the maximum values. Any other time it's less. This means you are rolling the dice every time you energize the MWs. You may turn them ON and the first time the breaker trips. Or the 300th time the breaker blows as it all depends on where in the power line cycle the switch gets thrown.
If you always leave the MWs ON but just dim them then your breaker tripping opportunities are obviously reduced.
The aforementioned problems that diode-front-end power supplies cause is so onerous to the power companies and to places where a lot of switching supplies are used, like offices with a bunch of personal computers, that the laws are changing on the subject of switching supply front ends.
Enter the Power Factor Controlled (PFC) front ends. Instead of diodes hooked to capacitors the diodes are replaced with a controlled network of transistors and inductors. The control directs the current drawn from the power source to be drawn smoothly over the entire power line cycle not just in gulps - no gulping allowed. This avoids ALL the current pulsing and wire heating. This same network can provide the bonus of eliminating the inrush too. As the initial energy drawn on start-up can be actively limited.(Note that these PFC Meanwells don't limit inrush much.)
The HLG line is Meanwell's PFC or "active front end" current drivers. They would be the choice for those wanting a "bunch" of drivers."
