Scott, this reminds me a lot of some special PDU's I was involved in the design with a company called Equi-Tech.

The PDU's are used for branch circuit distribution in data centers. Basically a 480 delta input, and 6-phase output. The big difference is the outputs were used for balanced power systems or 120/60. Really clean power, no grounded circuit conductor, no cross-over or harmonic distortion, and no noise injected into bonding & ground conductors.

The other place I have seen this used extensively is in 208 and 480 3-phase rectifiers employing SCR's used in DC battery plants in telephone offices. They still make them, but not many sold anymore as switch mode rectifiers have pretty much taken over the Telco market.