The Qualified Power Processing Unit (PPU) is a power management equipment intended for LEO satellite applications and designed according to ESA ECSS standards. It conditions onboard voltage to power a Hall thruster from 100W to 500W and controls xenon propellant feeding system. It is based on a modular design that allows customers to choose only the mission-specific functionality and redundancy level (single or dual string) required, thereby optimizing mass, power, and volume.

The control system provides fully autonomous operations in any operational mode, and it is designed to be a failure tolerant unit. In case of an under-voltage event, it can restart automatically as soon as any power source becomes available.

The PPU is designed as a part of the Electric Propulsion System (EPS), which consists of SETS ST-25 or ST-40 Hall thruster and xenon propellant feeding system (XFS). PPU consists of 3 main subsystems: high power and low power modules and the main controller.

The low-power module is intended to control XFS consists of a low-voltage power supply for sensors, heaters, valves, a microcontroller with a communication interface, and measurement circuitry for sensors.

The low-power module is intended to control XFS and consists of a low-voltage power supply for sensors, heaters, valves, a microcontroller with a communication interface, and measurement circuitry for sensors.

The power conditioning module controls the high-power flow from the onboard source to high voltage converters for anode and cathodes, using power stabilizing operation mode.

The main controller performs an operating algorithm, controls all power converters, measures input signals, and provides communication with avionics.