Help with Kollmorgen Servo star

[Neale]

Looking at that diagram, it looks as if it would run happily on single-phase. The diagram shows each supply line fused but as the notes say, if you use live and neutral, you should not put a fuse in the neutral line. The common HY 2.2KW inverters are just the same, it's just that most people don't realise that they could take three-phase input. The spec sheet gives the current requirement for single and three-phase input for appropriate fusing.

My main concern is that the drawing suggests an isolating transformer on the input, and I wonder about mains isolation in the servo - whether the transformer is required for isolation or just shows where you might need a voltage-changing transformer.