Damn - what a bummer intro to electric.Most likely you'll need to replace the element (not unheard of for the keg king ones)... although make sure you're using it on a dedicated circuit (or everything else is turned off) just in case the beer fridge was helping with the overload.If it's an RCD breaker that's tripping it could be an earth leakage. Multimeter tests between the neutral/earth and active/earth pins on the element plug may identify this... also test with the pot wall instead of the earth pin.If it's an earth leakage, or you're sure it's shorting out, then get onto keg king... they know the drill. Or, order a Camco one from Amazon (from about $25 delivered), and get a sparky to wire up a suitable extension lead for it.Other more expensive (probably more reliable too) options out there, can't vouch for any but I've heard names like 5 Star and an AHB'er going by Punkel(?) that do nice SS elements... OBS has got some elements as well, plenty of choice out there.Good luck...
