UK what size fuse should I use in a DC syatem?

[pt12345]

Hello if I have an appliance with a max current draw of 5.55A and an short circuit current of 6.11amps what size fuse should I use in a DC syatem?

 

[westward10]

What is the appliance and how have you established a short circuit current.

 

[Pete999]

Hello if I have an appliance with a max current draw of 5.55A and an short circuit current of 6.11amps what size fuse should I use in a DC syatem?

Does it work on A/C and D/C then?

 

[Lucien Nunes]

More info needed. What is the source of supply? How is the short-circuit current determined?

If the 6.1A short-circuit current is limited electronically by a regulated power supply unit, then no fuse is needed because that limiting will protect the load and circuit. It would not even be possible to blow a fuse of adequate rating unless there is a very large output reservoir capacitor.

If the short-circuit current is limited by circuit resistance, the numbers don't make sense, because most of the supply voltage would be dropped in the resistance.