When testing dispersed energy products, such as PV inverters, energy storage systems and wind turbines, the traditional test set up requires a load bank in parallel with the DUT and AC source. The PAS-F system does not require the parallel load. Instead, full DUT current is sunk into the AC source and 92% of the power is regenerated back to the utility grid, saving energy and reducing system-cooling requirements.
The PAS-F system offers fully adjustable output voltages (up to 305V line-to neutral, 528V line-to-line) and frequency (40-70Hz). It features embedded Low-Voltage-Ride-Through (LVRT) test windows to allow for simple programming of compliance routines, including the 10% LVRT requirements.
The DSP-based controller allows for independent phase angle, voltage and phase imbalance control to meet requirements, such as IEEE1547, where multi-phase inverters must be tested on an individual basis and all phases simultaneously. The PAS-F system can also be used as a reference AC source for use in UL1741, IEEE1547, BDEW (Germany) and CEI0-16 (Italy) compliance testing.