after power cut - fuses all on and no power? (to pool filter)
Sometimes when breakers trip, they can look like they're still on.  Try turning it off, then on again.  

There may be a fused disconnect, which is just a metal box with a door, with a little handle thing inside. Pulling the handle thing out, cuts power to the fuses.  Then you'll have to remove a cover plate, to gain access the fuses. 

Without seeing the equipment, it's difficult to provide an accurate answer.  If you post some photos, we might be able to help.