Sorry mate.. missed the adding another transformer bit..
Ok... the SP tranny SHOULD be OK so long as it got turned off ASAP... the windings no doubt got hot and the laminations started to cook, but so long as the laminations didnt breakdown - youll be OK.
The flouro tube is just a tube attached to another transformer ( ballast), id be very suprised if its in any way connected to the main transformer.. it should run off the 240V or if its a 110vmachine , then off the step down. It wont come from the transformer output ( or it shouldnt!).
You have something drawing a lot of current... you need to find what this is and the best way is by a process of elimination. If you go to Jaycar you can buy a trip switch which acts like a fuse except you can reset it... or buy some fuses that are of lower value than those on the output side of the transformer. Plug in the machine with everything on the output unplugged and see what happens.. transformer wont get hot.
Turn off the machine and place a lower value fuse ( say you require 5A.. put in a 3A, if it states 2A then put in a 1A etc.. all fast blow)... plug in ONE connector and see what happens.. etc etc etc until you find just where the fault lies.
Just to add, you can put your finger on the metal plates in the middle of the transformer without danger to see if its getting hot.. or better still, a digital thermometer ( keeps hands out of harms way)
Good luck..
