I had one of those at SPC. We got it as a donation from the local power company after complaining about the electric service (specifically, after they pulled a phase reversal stunt that caused my RP07 drives to jump and kill themselves).
It requires oddball circuit breakers (there's a full circuit breaker panel under the hinged top) and then you need to either build or buy pigtails made out of flextite conduit and outdoor-grade receptacle boxes.
We ended up hooking it up just on the input side so we could look at voltages and use its monitoring and problem reporting (there's a little receipt-style printer on the top left with the other controls). We'd usually get a foot or two of power problem printouts over each 24-hour period.