Hi,
The load only draws that much current that it needs.
If you have a 30V 1A load, then it will draw only 1A (independent of power supply max current specification)
But in case of a failure (shore circuit, worng wiring...) it may draw a lot more.
Just to prevent an explosion, or fire you may use a slow blow 1A..2A fuse.
(A true current limitation - but still have precise voltage - is difficult. And in case of overcurrent it dissipates a lot of heat)
I hope this is what you wanted to know.
Klaus