AC301SHP / AC303SHP Series High-Power AC Grid Simulator Power Supply

The AC301SHP (single-phase) and AC303SHP (three-phase) deliver programmable AC power from 5kVA up to 500kVA. Their fully isolated output stages and < 1% THD performance support high-power industrial testing, EV motor and charger validation, large appliance testing, and facility-level power simulation.

Frequency envelope and facility notes

Programmable frequency runs from 40 - 250 Hz, which places standard mains simulation and the excursions around it inside the envelope and higher-frequency ground-power work outside it. On the AC301SHP / AC303SHP, fully isolated input and output allow the output neutral to be referenced independently of the incoming supply, which is what makes floating and corner-grounded DUTs practical to test. This series sources AC only, so a test that must absorb and return the DUT’s energy, or that needs a DC output from the same instrument, belongs on a regenerative four-quadrant platform instead. Toward the 500 kVA end the installation becomes a switchgear, cable and facility-feed project, and the supply side is usually the long-lead item rather than the instrument.

Sizing on kVA, inrush and phase count

The AC301SHP / AC303SHP rating is apparent power, so a DUT with a poor power factor or a high crest factor consumes capacity that a watts calculation never shows, and the sizing input should be the VA the DUT actually draws rather than its nameplate wattage. Size motor, transformer and switch-mode inrush using the measured DUT demand and a confirmed overload-time envelope. A three-phase requirement should be checked against the 0 - 520V line-to-line figure rather than the phase figure, because drives and machines are normally specified by line voltage. Two phase ranges exist for the same reason the accuracy is quoted as < 0.2% FS: low-voltage work belongs on the 0 - 150V range, where the full-scale term is smaller in absolute terms.