The single-phase power supply unit is an electrical transformation device consisting of an electrical panel that allows the single-phase 230 Vac mains supply to be converted into the 575 Vdc and 440 Vac supplies.

This accessory allows the machines to be installed and operate even in contexts where the three-phase 400 Vac power supply is not present.
The device cannot be installed after the machine has been installed.

Single-Phase power supply