Power supply phenomenon:Can't go beyond a certain voltage even when knob turned

Nothing on the psu says 'Current-limiting' but it sure acts like it.
So,when the psu starts to do the 'current-limiting' thing, this means I've exceeded the nominal current right?
With the exception of a short-circuit happening,is there any other way that I could cause an excess current flow through the circuit? for instance a fried chip in the circuit...?

I'm a novice.