i dont think its the box fan, pretty sure its the ac cuase the do draw a lot of power, i also had a similar problem but with my heater, if you have to much power in one surge protector it will click off

I've been told in the past by a few electricians that surge protectors don't actually protect anything they just act as another extension cable and your room shouldn't be tripping the electric with that (I have a 50" Plasma TV, 3 PC Monitors, my electrical chargers, 2 fish tanks, a turtle tank, an xbox 360/one, SKY +hd box, ps3/4 and my 750 watt gaming pc (probably more as well) running from one wall plug 8 different extension cables haha, and my room hasn't tripped the electric ever other than when my old rubbish water heater blew up and killed all my fish but thankfully didnt damage the tank or it would be 64 litres going through the floor :/), I'd get in touch with the electric board you are with as it could be something serious wrong with your elecric cables, as that shouldnt be happening

it could also be the quality of the surge protector a $10 will most likrly trip more often than lets say $100 one

On the back of your power supply is there a switch where you can change the voltage? If so make sure you are using the right kind with your area or residence. If this isn't the problem that's really strange.

LAUGHING_TAC0 wrote it could also be the quality of the surge protector a $10 will most likely* trip more often than lets say $100 one

I had my old pc hooked up to a 150 surge protector (I think that was the price, and my pc actually set on fire when we had a thunderstorm so that just shows they dont work :/ I have also asked 5 different electrician's and they said that the surge protectors dont work at all :/ which sucks really as they do cost a lot of money

I bought a $39.99 one not sure ... But yeah

i would plug in the AC in a different plug, had the same issue it was my AC.