Start with the news release DC programmable power supplies offer stable output from Safety Power Group, which we summarised at the time by saying "Safety Power Group has launched a range of high-quality 6000W DC programmable power supplies for bench- or rack-mount test and measurement applications offering stable voltage or current output.". Several months prior to that, we featured the news release Programmable supplies provides more power from Xantrex Technology: "Programmable linear power supplies are equally at home on the bench with manual adjustment and as part of digitally controlled ATE systems.".
 
In April 2008, we covered the news from Telonic Instruments - take a look at DC switching supplies offer high power density which says: "TS Series power supplies are current fed, and are more tolerant to abusive loads than conventional switching power supplies.".
 
Take a look also at the news release from Safety Power Group, Half-rack supplies for flexible test regimes, as well as PSU tester eases integration using LXI from Intepro UK, and Dual-display multimeters have graphical edge from TTi (Thurlby Thandar Instruments).