This is my pole pig, 3 primary taps, using the 'lowest' voltage tap at 270 volts input I get 15900 V output, it's rated at 5KVA but I have run it at 10KVA for 3 to 4 minutes at a time with no ill effects. Since then I have swapped my old transformer for a new 33kv/15kva unit, see bottom photo. This is the unit that powers the coil in the full power arc pics section.