This is a transformer for split phase output balancing. The input current is limited by the built in breaker to 32 Amps. The split phase output balancing works as follows: When the input is 240 volts you can have two 120 volt load groups with a total output of the full 32 Amp rating regardless of whether the loads are balanced or not. The transformer automatically takes care of the load balancing. See the links below for more details. This is not a conventional multi purpose transformer. If you are not proposing to use this transformer for load balancing then it is probably not the transformer for you
The Autotransformer is pretty complicated. I tried to explain it a bit more in my Blog Post on the subject.
