Evening guys. Right at intake position (riser) voltage is 220v@60hz TN-C-S and this supply will be situated in Misami Oriental in a new build. Now one of the big problems with power in that area is that there are a lot of power downs which cause a massive spike when the power is reinstated, this apparently causes a lot of damage to fridge/freezers, tv's, even air con units etc etc I think you get the picture. What people there do is that when a power down occurs they unplug stuff and generally turn things off until power is reinstated. Now what I want to do is use an UPS unit which would be around the 20 amp mark to maintain supply. My question is does the UPS incorporate a surge arrestor or do I have to use a separate unit for that? Obviously when power is reinstated and UPS goes to sleep mode I want the spike absorbed before 220v rms is outputted. Would be very grateful for any help on this matter.