Well here goes... Aluminium frame router design

[Doddy]

You might find the transformer has a primary rated at 220 or 230VAC and your stuffing 240 up it, with the proportionally higher secondary voltage. Under load you're going to see a reduction in terminal voltage anyway - so long as the electronics can take the peak voltage okay then I wouldn't lose any sleep on the 75V output. I have a 600W 50V toroidal that also gives me an unloaded 75VDC on the caps, and I chose the same drivers for that reason.