Had this also happen
I also had my 5 amp field circuit breaker for my 60 amp plane power alternator pop once. Discussed this with my A&P/IA and we reset it. It hasn't repeated itself and it's been almost a year. Sometimes xxxx happens for no apparent reason.
If it was me I'd reset it and wait to see if it repeats. If it does, investigate further.
Jim Harris, RV7A, 2nd owner, N523RM
IO-360, Hartzel CS prop, Older Aerotronics built panel Dual GRT Horizon WS, Garmin 340, 335, Dual 430s, Stratux hard wired to WS, Dynon D10A (backup EFIS)
Retired - Living the dream - And going broke!