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AC-DC source makes three-phase power more affordable

AC-DC source makes three-phase power more affordable

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By Nick Flaherty



The MX22.5 can be configured to have single-phase or three-phase outputs in AC, DC or AC+DC mode. The MX22.5 is more economical than the California Instruments MX30, while at the same time offers more features and higher output power than the product family’s MX15 model.

The California Instruments MX Series II provides controlled AC and DC output for a wide variety of automated test equipment and product test applications at an affordable cost. Using state-of-the-art PWM switching techniques, the MX series combines robustness and functionality in a compact floor-standing chassis, no larger than a typical office copying machine and does not need elaborate cooling schemes or additional installation wiring.

The MX22.5 can be operated completely from its menu-driven, front-panel controller while a backlit LCD display shows menus, setup data, and read-back measurements. Users can combine units to configure systems up to 135 kVA or more with phase mode programming to allow users to easily switch between single-phase and three-phase output modes.

The latest DSP technology supports generation of harmonic waveforms and arbitrary waveforms to test for susceptibility to harmonics and other power anomalies, while automatic crossover between source and sink power modes offers regenerative capabilities in AC or DC mode. The power sources can regenerate up to 85% of the rated output power back to the utility grid during sink mode operation when equipped with the -SNK or -SNK-DC option.

The MX Series can make a wide variety of measurements in addition to supplying power, including frequency, Vrms, Irms, Ipk, crest factor, real power (watts), apparent power (VA), and power factor. These measurements are accessible from either the front panel or the remote control interface.

The unit is available through distributor TTi. For more information see www.ttid.co.uk/ac-power-supplies/california-instruments/

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