EA-PSB 10750-20 3U 5kW Bidirectional DC Power Supply (750V, 20A, Regenerative, 3U Rack-Mount)

The EA-PSB 10750-20 3U is a programmable bidirectional DC power supply from the EA-PSB 10000 3U series, integrating the functions of a laboratory power supply and an electronic load into a single 3U rack-mount chassis. This high voltage DC power supply delivers up to 5000W of output power, with a voltage range of 0-750V and a current range of 0-20A. It operates seamlessly in both source and sink modes, automatically switching at zero crossing. When functioning as an electronic load, it acts as a recuperating power supply, inverting DC energy and feeding it back into the local grid with up to 95.5% efficiency. The unit features precise regulation with load regulation of ≤0.05% FS in constant voltage (CV) mode and ≤0.1% FS in constant current (CC) mode. It offers multiple operating modes including constant voltage (CV), constant current (CC), constant power (CP), and constant resistance (CR) for both source and sink applications. Standard connectivity includes a 5" color TFT touch screen with graph function, USB, Ethernet, and a galvanically isolated analog interface (0-5V/0-10V programmable). An integrated function generator supports sine, triangle, rectangle, trapezoid, arbitrary waveforms, and specific functions for battery testing, photovoltaic (PV) simulation, fuel cell simulation, and DIN 40839 automotive testing. The device supports parallel operation of up to 64 units for total power up to 960 kW and features comprehensive protections including OVP, OCP, OPP, and OT. It operates on a 380-480V AC three-phase supply with power derating to 3000W when running on 208V AC.

Key Features

• Bidirectional & Regenerative: Combines a DC power supply and an electronic load in one unit. In sink mode, it recovers energy with up to 95.5% efficiency, feeding it back to the AC grid and reducing operational costs.
• High Voltage Output: Provides a wide DC output range of 0-750V and 0-20A, with a maximum power of 5000W. Features low ripple of ≤200 mV RMS and ≤800 mV pk-pk in CV mode.
• Multiple Operating Modes: Supports constant voltage (CV), constant current (CC), constant power (CP), and constant resistance (CR) operation for both source (PS) and sink (EL) modes, offering maximum flexibility for testing various devices.
• Advanced Function Generator: Built-in function generator with predefined curves for battery charge/discharge tests, PV panel simulation (EN 50530), fuel cell simulation, MPP tracking, and DIN 40839 automotive start-up profiles.
• Comprehensive Connectivity: Equipped with built-in USB, Ethernet, and a galvanically isolated analog interface (0-5V/0-10V). Optional slot for Profibus, Profinet, EtherCAT, CANopen, RS232, or ModBus TCP modules.
• Scalable Parallel Operation: True master-slave parallel operation via Share BUS and digital bus allows up to 64 units to be combined, scaling total system power to 960 kW with automatic current sharing.
• Intuitive 5" Touch Screen HMI: Features a capacitive color TFT touch screen with real-time graph plotting of voltage, current, and power, plus two rotary knobs for precise value adjustment.
• Comprehensive Protection: Includes adjustable overvoltage (OVP), overcurrent (OCP), overpower (OPP), and overtemperature (OT) protection, with separate adjustable limits for source and sink modes.