Voltech AT3600 User Manual page 14

Primaries in Series, Secondaries in series
3 off 24 – 230 transformers were used.
The 3 x 24 V Primaries are in series, so that the input voltage would be comfortably above 50V, up to a max
on 72 Volts
The 3 x 230 V secondaries are in series – giving 690V output
This can be considered (and programmed into the editor as "At output + Transformer) as a 72 – 690 V
transformer with a gain of roughly 9.6
Each Transformer is 15 VA rated, so the whole step up is 45VA rated, so good for about 65 mA
V AC I U M 98-072 7 14
OLTECH NTERFACE SER ANUAL ISS PAGE