Agilent/Keysight RP7942A

The Keysight RP7942A is a single-output, bi-directional regenerative DC power supply operating in two-quadrant mode for source and sink functionality. It delivers 80 V maximum output, ±125 A current, and 5 kW maximum power while returning up to 90% of energy to the grid during regenerative operation. Designed for HEV/EV power converter testing, this 3U instrument combines fast transient simulation, battery emulation with programmable internal resistance, and simultaneous voltage/current measurement in a compact 773 × 427 × 132.6 mm package.

Technical Specifications

• Output Voltage: 0–80 V maximum


• Output Current: ±125 A maximum


• Maximum Power: 5 kW


• AC Input: 400–480 V, 3-phase, ±10% tolerance


• Power Factor: 0.99


• Efficiency: >80% typical (up to 91.5% within RP7900 series)


• Regeneration Efficiency: 90% return to grid


• THD: 2% typical at full load during regenerative operation


• Form Factor: 3U rack, 27.3 kg

Key Features

• Two-quadrant operation with uninterrupted sourcing/sinking transitions


• Autoranging output expands power curve beyond rectangular limits


• Battery emulation with adjustable internal resistance for state-of-charge characterization


• Step function and constant dwell arbitrary waveforms up to 65,535 data points


• List function mode with 512 steps and trigger-paced advancement


• Simultaneous voltage and current measurement with built-in calculations

Typical Applications

• High-voltage battery pack testing and early failure detection


• Electric vehicle power converter validation


• Transient response characterization under dynamic load conditions


• Regenerative energy capture and grid return scenarios

Compatibility & Integration

• LXI Core compliant LAN, USB 2.0, GPIB interfaces


• Web browser remote control via LAN


• Seven user-configurable I/O pins on rear panel


• Programmable via standard instrument protocols