The bidirectional DC laboratory power supplies of the PSB 10000 series from EA Elektro-Automatik are two-quadrant devices that can function both as a power supply and as an electronic load. In load operation, the DC power supplies operate regeneratively, feeding energy back into the local power grid with an efficiency of over 96%. The PSB 10000 series includes single-phase and three-phase devices that can accommodate nearly all grid voltages worldwide due to their wide input range. The DC voltages and currents are application-oriented, ranging from 0 - 10 V to 0 - 2000 V and from 0 - 6 A to 0 - 1000 A in a single device.