The server market is steadily growing due to strong demands from cloud service providers and the expansion of next generation IT related infrastructures.

Mission critical server power supplies require testing and verification against stringent regulatory test standards to ensure operational efficiency of the server system. For instance, the immunity test standard includes voltage dips, short interruptions, and variations for both AC and DC as input requirements. Another functionality test includes simulating the transfer of input power from the main to backup system via UPS or HVDC system during abnormal power conditions (figure 1) to ensure dropout timing requirements are met.

▲Figure1: Transfer of power during power loss condition

Chroma model 61509 (figure 2) is a high power density (5U height), 6kVA single- and three-phase output programmable AC Source capable of meeting rigorous test standards. With a maximum output voltage of 350Vac/495Vdc, the 61509 meets both AC and DC input voltage test requirements for server power supplies.

▲Figure2: Chroma model 61509

Furthermore, the DC output power rating of the 61509 has been increased to 75% of the full rated output power and the control loop for individual coupling mode (AC, DC, AC+DC) has also been optimized to further extend test capabilities for AC/DC server power supplies. The 61509 is capable of delivering output frequency up to 2000Hz and possesses the ability to generate pure sine waveform output with typical distortion of less than 0.3% at 50/60Hz. These features make the 61509 ideal for commercial, power electronics, avionics, and regulation test applications from bench-top R/D design verification and quality assurance to mass production.

For more information on the Chroma 61509 features and specifications, please visit Chroma's website: Programmable AC Power Source Model 61509/61508/61507