I have a Tripp-Lite IS1000 isolation transformer. I want to use this to electrically isolate devices from mains and earth ground (during service/repair procedures), and aim to modify this transformer to achieve that.
However, this isolation transformer's circuit is confusing me (hand-drawn circuit diagram attached). My concerns:
1) I cannot identify the primary and secondary coils because mains hot/neutral are connected to both coils. Why?
2) The outputs also tied together on both coils, at the outlets. Why?
3) This circuit seems to deviate from my expectations. I expected both coils to possibly share earth ground, but not couple mains (input) together, and couple the outputs together. A general analysis of what's going on here would be appreciated.
* edit - schematic now attached