DC electronic load features energy recovery to AC mains

The ELR9000 series of electronic dc-loads feature an integral, grid-synchronized inverter designed to return up to 94% of the load test energy back to the grid. The rack-mounted unit is available, off-the shelf, with output ratings of 3.5 kW, 7 kW and 10.5 kW, scalable to 105 kW.

The dc loads offer four common regulation modes: constant voltage, constant current, constant resistance and constant power. The FPGA-based operational controls include a function generator and a table-based regulation circuit for the simulation of non-linear internal resistances. The PowerStar 6 software package enables the creation of test routines using a drag-and-drop menu where coding can be performed without programming.