This is an ideal Y-Y connected three-phase rectifier. The primary and secondary sides of the transformer are both Y-connected with the star connector to establish ground. The three phases are then sent into the Universal Bridge subsystem, which consists of ideal diodes that perform full-wave rectification of the three phases. The load consists of a resistor and a capacitor. The capacitor filters the ripple present on V+ to provide the resistive load with a more stable voltage.