I was using my power supply to power an electronics project. The power supply is a TM035-3/GM035-3 0-3A 0-35V CC/CV power supply. When I turned the supply off, then on again, it made a little pop sound from inside and the RCD for the sockets tripped. (Lights remained.) It also blew the 5A mains input fuse. Obviously both safety features helped protect against a bad failure. After untripping the RCD and replacing the fuse, all is well - it still works perfectly fine. I am now a little concerned about how the power supply blew both the fuse and tripped the RCD! I have turned the supply on and off many times before. I am thinking inrush current but why only this time?

 

RCD? You need to defined anagrams at least once in a thread.

 

It's the inrush or surge....this happens to me all the time.

I simply swear & turn on the Breaker

{ed}
RCD...Residual current Device thingy

We have ELCB...Earth Leakage Circuit Breaker thingy

 

RCD = Residual Current Device (used to be called Earth Leakage Circuit Breaker)

In the United States and Canada, a residual current device is also known as a ground fault circuit interrupter (GFCI), ground fault interrupter (GFI) or an appliance leakage current interrupter (ALCI)

http://en.wikipedia.org/wiki/Residual-current_device

 

Oh! That. It does sound like capacitor surge to me.