These three-phase AC supplies with separate windings have an adjustable variable output voltage and a variable output frequency. These AC supplies are suitable for simulating a mains network and for testing devices, components or installations typically for 60-Hz networks. They consist of an inverter with adjustable frequency and, ensure with REO sinewave filters, a clean sinusoidal form at the output.

All power supplies can be fitted as an option with a computer interface for external operation. This equipment can of course be designed with other technical parameters to suit a customer‘s wishes.