Electronics > Projects, Designs, and Technical Stuff
EMC testing, problems with MeanWell power supply
Kasper:
Thanks for the update. What was happening to the power supply after 2kV?
honeybadger:
This time there was audible clicking coming from the PSU while tested at 2kV. I am not sure if there is a spark gap inside or destroyed MOV which act like a spark gap now... I don't know. I will try to open this PSU in near future. Lab assistant was scared of that PSU might get damaged even more and then take our device with it - he stopped the test. To be honest I am not 100% sure about this but it all seems that with 2kV pulses the PSU somehow locks and its not able to recover with its watch dog timer. With 1kV there is no problem. Not even single PSU power outage.
station240:
Could be something as simple as a failed class Y cap, or bridge rectifier diode.
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