T
treez
Guest
Hello,
I was today powering a 150W offline LED light in the office. It’s a non isolated design, no transformer.
The PCB is on an earthed heatsink, but is insulated from it with a thin insulating sheet. There is no earth connection to the PCB itself.
Today it blew up, but strangely didn’t blow the 1.6A fuse in the AC line upstream of it. Some series resistors overheated and blew up (went open), so it just stopped working. The problem is, the blow up turned off the office electricity supply, and everyone’s computer went off.
Do you agree that installing an RCD wouldn’t have helped as the current couldn’t have flowed through earth (since earth isn’t taken to the PCB).
Do you know of any cheap protection units that I can put in my mains cable so it doesn’t trip the office electricity supply every time something blows up?
I was today powering a 150W offline LED light in the office. It’s a non isolated design, no transformer.
The PCB is on an earthed heatsink, but is insulated from it with a thin insulating sheet. There is no earth connection to the PCB itself.
Today it blew up, but strangely didn’t blow the 1.6A fuse in the AC line upstream of it. Some series resistors overheated and blew up (went open), so it just stopped working. The problem is, the blow up turned off the office electricity supply, and everyone’s computer went off.
Do you agree that installing an RCD wouldn’t have helped as the current couldn’t have flowed through earth (since earth isn’t taken to the PCB).
Do you know of any cheap protection units that I can put in my mains cable so it doesn’t trip the office electricity supply every time something blows up?