Boss 8 3ph transformer help

I have re-fitted my boss 8 controlled series 1 b/p using rutex drives and have now sorted out the drives etc and are setified with their running at 24v. However I want to run them at about 96-100v. The main 3ph isolation transformer has terminals on it marked 0, 60,70,80V. there are three of each of these (1 per phase) that link to a rectifier secion. Now if I connect the ov line together and then use the 60v output I get approx 160V. Now the old drives are rated at 100v so the qusetion is this

Am I wiring the transformer correctly ??

If so then what do I need to do ????


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