Self-resetting can be tricky. It is easy to inadvertently build a power oscillator. Normally I'd say to use an LTC electronic circuit breaker controller (some have a hiccup mode auto-reset), but your midrange voltage drop is only 2.5 mV, not enough to sense without outboard amplifiers, etc. Multiple turns through a closed loop hall effect sensor will get you the low voltage drop, but they are not super-accurate and pretty large. As above, a form C reed relay would work, but without some external control it would chatter like a point-contact buzzer. Hmmm...
ak