Imagine you are asked to install a used buck-boost transformer. Imagine you could normally do this in a few minutes. Except if the leads were cut short such that identifying characters on the leads' insulation were missing.
Identifying 2 leads belonging to any one winding is straightforward ohm meter work. Maybe use of a ESR meter might help separate the X windings from the H windings?. But identifying which specific winding is which and which end is
How would you go about identifying the windings? Maybe use a Variac to input voltage to each of the windings then measure the output of the others? What outputs should I expect at, for example, the H3/H4 winding with a voltage on H1/H2 winding? How to identify backward connection of a winding?
Are the two H windings identical? The two X windings?
This is a 208 -> 230 (ie, 12 & 24 v buck-boost voltage) single-phase autotransformer in N. America.