[Andy A.]

If connected to a Jaguar on a canbus network I believe it is possible to use the Jag's built in current sensing ability to limit output in real time. The software implementation might be a little hairy, as in currently non-existent, but probably doable. Take that with a grain of salt, because I've never seen it done and what you should be able to do with Jaguars and what you can do are sometimes different. Or it's just not documented.

Alternatively, stand alone current sensors could be used to provide feedback to the control system. The control system could then limit output of a Victor (or Jaguar I suppose) or turn off a relay to protect a motor once a predefined current limit has been passed.

All in all, the breakers and fuses are there to protect the wiring, not the motors. It's best practice to protect motors through mechanical, or controls methods.