It takes in 415V AC three phase, rectifies it, and chops it at a frequency determined by the resonant frequency of it's internal bank of capacitors, and the external coil that is wrapped around the crucible. The blue box is connected to the furnace body by four 3/4" heavy wall rubber pipes that have very thick stranded copper (actually welding) cable passing up them. Coolant passes though the pipes, round the coil in the furnace (which is copper tube) and through the components of the blue electronics cabinet. I also have a 15kW chiller to keep this coolant below critical temperature. The coolant is the 'food grade' ethanol glycol.
It was working splendidly before I moved but has been in storage for the last six years so I hope it still works. No doubt there will be teething troubles. The circulating currents in the water cooled cables are measured in thousands of amps
I used to run it off a 100 kVA generator but here I've had a 160 amp per phase 415v three phase supply laid on so can hopefully run it off the mains. I was measuring 150 amps per phase off the poor old generator at the last place for short periods
It was working splendidly before I moved but has been in storage for the last six years so I hope it still works. No doubt there will be teething troubles. The circulating currents in the water cooled cables are measured in thousands of amps
I used to run it off a 100 kVA generator but here I've had a 160 amp per phase 415v three phase supply laid on so can hopefully run it off the mains. I was measuring 150 amps per phase off the poor old generator at the last place for short periods
Andrew Mawson, proud to be a member of MetalworkingFun Forum since Oct 2013.