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The Divertor Tokamak Test facility (DTT) is a Controlled Thermonuclear Fusion experiments which is in the scope of the Eurofusion programme to investigate the effects of thermal loads on the divertor. DTT will be realized at the Enea Research Center in Frascati, Italy and in the first experimental phase it will exploit an Electron Cyclotron Resonant Heating system (ECRH) exploiting 16 radio frequency (RF) sources (Gyrotrons) rated for 1MW power. These are fed in couple by a total of 8 high voltage power supply set (HVPS) based on the ITER design which procurement will be launched in 2023. Each HVPS is composed of one Main High Voltage Power Supply (MPS), rated for 55kV 110A, and two Body power Supplies (BPSs), rated for 35kV 20mA and this work will describe the power supply requirements, the conceptual design of the DTT HVPSs system, the layout and interfaces with the main systems.
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