I had a few other breeders that I know tell me that they had snakes shipped to them that came in cold. somewhere in the 50" and they were ok. the only things you can do is keep your eye on them, knowing what they just went threw.
the circuit breaker is tripping and shutting the power off. it's doing this because this circuit is being over loaded. (too many things plugged into this circuit) you need to plug some of these things into another circuit. if you don't and that circuit breaker fails to trip, it can be a start of a fire. it's tripping now to prevent this from happening. good luck with your snakes, hopefully they will be fine. don