EA-PSB 10920-125 4U Programmable Bidirectional DC Power Supply & Electronic Load

The EA-PSB 10920-125 4U is a high-power, programmable bidirectional DC power supply that seamlessly integrates the functions of a 30 kW bench power supply and a recuperating electronic load into a single 4U rack-mount unit. With a wide output range of 0-920V and 0-125A, it serves as a versatile 920V programmable power supply for testing high-voltage applications and a precise 125A electronic DC load capable of sinking energy with up to 96.5% efficiency. Its bidirectional nature allows it to act as a regenerative DC load, feeding recovered energy back into the AC grid, making it an efficient solution for battery testing, photovoltaic simulation, fuel cell testing, and power aging. Featuring a 5-inch color TFT touchscreen (HMI), built-in function generator, and extensive remote control interfaces (USB, Ethernet, analog, optional digital buses), this programmable DC power supply offers unmatched flexibility and control for laboratory, production, and high-power test environments.

Key Features

• Bidirectional Operation: Functions as both a high-precision 30 kW DC power supply (source) and a 30 kW recuperating electronic DC load (sink) in one device, enabling seamless sink-source switching.
• High Power & Voltage: Delivers up to 30 kW of continuous power with a wide voltage range of 0-920V and current up to 125A, ideal for testing high-voltage components and systems.
• Energy Recovery (Recuperation): As an electronic load, it recovers up to 96.5% of the absorbed DC power and feeds it back into the AC mains, significantly reducing operating costs and heat dissipation.
• Advanced Programmability & Control: Equipped with a built-in function generator for creating complex voltage/current profiles (sine, ramp, arbitrary, PV/FC simulation, battery test, MPPT). Supports local control via touchscreen and knobs, and remote control via USB, Ethernet, isolated analog interface, and optional modules (CAN, Profibus, Profinet, Modbus TCP, EtherCAT, etc.).
• Comprehensive Safety & Protection: Includes fully adjustable OVP, OCP, OPP, overtemperature (OT) protection, and user-definable event monitoring (UVD, OVD, UCD, OCD, OPD) for safe operation with sensitive devices.
• Scalable System Integration: Features Master-Slave and Share bus for parallel operation of up to 64 units, creating systems with power up to 1920 kW. Available in standard air-cooled or optional water-cooled (WC) versions for high-density installations.
• Precise Measurement & Logging: High-accuracy voltage and current measurement. Front USB port supports data logging to USB stick, saving operational data in CSV format for analysis.