The Elektro-Automatik PSB 10080-120 2U Single Output Bi-Directional Programmable DC Power Supply, 80V/120A, 3000W, 2U Rack is a two quadrant device that can perform the function of a power supply (source), as well as that of an electronic load (sink). In sink mode the device is regenerative and feeds the energy back into the local grid with an efficiency of up to 96%. The EA-PSB 10080-120 2U is compatible with practically all global mains voltages. The DC voltages and currents are determined by the application and the spectrum range. The DC supply operates as a flexible output stage with a constant power characteristic (auto-ranging) and a wide voltage and current range. To achieve higher power and current this unit is equipped with a master-slave bus. This enables up to 64 parallel connected devices to be combined into one system. Such a system works as a single unit and can use different power classes, only the voltage class must remain constant. Furthermore, typical laboratory functionality is provided. This includes an extensive function generator, alarm and warning management, assorted interfaces and ports, software solutions, and more.

The PSB 10080-120 2U is equipped with an active PFC which provides a high efficiency at a low energy consumption. It can be operated in the majority of global mains supply. It adjusts automatically, without additional configuration, to the available supply. The energy consumed in load mode is fed back into the connected grid with an efficiency of up to 96%. As the energy is not converted to heat, the energy costs are reduced. In addition, this device generates less heat, requiring less cost-intensive air conditioning. The PSB 10080-120 2U is sufficient for a wide range of applications, reducing investment and installation costs.

Based on typical applications, any Device Under Test (DUT) consumes energy from the mains, converts it to DC, then feeds it into the PSB 10080-120 2U. The bidirectional power supply then converts this energy back into an AC current and feeds it back into the mains.

The PSB 10080-120 2U has flexible output stages (auto-ranging) that provide users with a wide voltage, current and power range - a wider field of work is possible, than with traditional power supplies.

Connection of the DC output is done via copper blades on the back side of the PSB 10080-120 2U. With minimal effort these devices can be linked with the vertical copper rails; a cover is included to protect the contact.

The PSB 10080-120 2U is equipped with a function generator. This allows waveforms such as sine, triangle, square or trapezoid to be simply called up and applied to either the voltage or the current. A ramp function and a arbitrary generator allow voltage and current progression to be freely programmable. Test sequences for repeated tests can be saved and reloaded when needed. An LUT allows IU and UI reference lines to be stored. For simulating photovoltaics systems or fuel cells, adaptable tables are provided. With the standard PV characteristic curve (DIN EN 50530) various solar cells and many other technology parameters can be selected and set. In short, the user is supported by a multitude of useful functions.

As standard, the PSB 10080-120 2U is fitted with the most important interfaces and ports which are all galvanically isolated from the DC input. There is an analog interface which can be parameterized for input and output, control and monitoring, voltage, current, power and resistance, assorted inputs and outputs, as well as USB and Ethernet ports.

When the integrated master-slave bus and share bus are used, a multi device system behaves as a single device. With the master-slave bus, the system data (such as total power and total current) are collected and displayed on the master unit (PSB 10080-120 2U). Warnings and alarms of the slave devices (not included) will also clearly display on the master unit (PSB 10080-120 2U). The share bus provides an equal load distribution to the individual devices.

A typical application for the PSB 10080-120 2U is testing the electrical characteristics of a battery. Its wide application spectrum covers cell, module or pack tests, the determination of the SOH (State-of-Health) for a second life classification, as well as End-of-Line (EOL) tests. These applications put many demands on power electronics, which the PSB 10080-120 2U can fulfill. The PSB 10080-120 2U features measurement of voltage and current with the required accuracy and dynamism, reproducibility and reliability of these data, and its economic and flexible usage. Whether in an automated test system or in an integrated battery test, all possibilities are open to the user with this power supply.

Some of PSB 10080-120 2Us additional applications include battery simulation as single cells, modules, or packs. These simulations aid in the optimal configuration of energy storage as well as the supplied components under test. Wherever reproducible data is needed, a battery simulator is the first choice. Also, the use of a power source as a simulator provides protection for the connected consuming component. The overcurrent protection (OCP) can, like a safety fuse, switch off the output and generate an alarm. The voltage can be monitored and can - if over or under limits - trigger various functions, and also generate warnings and alarms.

The PSB 10080-120 2U can also be used for testing the electrical features of fuel cells, fuel cell stacks and fuel cell systems. Here it can generate highly accurate and reproducible results in all electrical modes. To test the resistance, performance, and active life of a fuel cell quickly and economically, users can readily incorporate the device into an automatic testing system. The feedback capability guarantees a high level of energy and cost efficiency.

During an on-board charger test (OBC), the electrical features must be tested under various conditions. This requires a flexible test system which also provides test data. With the sequencing and logging functions of the included EA Power Control software, data can be exported and saved. In this way, applications can instantly generate reproducible test results based on dynamic and highly accurate set point and measurement data. To avoid competition between two separate control loops of the device under test (DUT) and testing device, the control frequency of the power supply is adjustable. The modes Normal/Fast/Slow allow the power supply to adapt to the control characteristics of the on-board charger.

The PSB 10080-120 2U programmable power supply is highly suited to use as a test systems for PV inverters, as they can provide the necessary simulation for solar cells. Users can readily program simulation models according to EN 50530 or Sandia using diverse solar cell materials. An IU curve can be accurately reproduced, parameters such as irradiation, shadow, temperature, clouds, and rain can be included. Thus, the PSB 10080-120 2U can test all of the relevant electrical features of a PV inverter, including the particularly important determination of the inverter's efficiency. Users can select a static or dynamic Maximum-Power-Point-Tracking (MPPT). The high resolution of 16-bit technology and a sampling rate of 1μs enables this power supply to deliver exact results, which can be documented and saved to an Excel file.

The PSB 10080-120 2U can enable retired batteries from electric vehicles for possible further use. Assessment of the battery pack starts with a State of Health (SOH) check to determine if a second life is feasible. This standard integral function can be initiated with the press of a button. If this check shows too little rest capacity, then the battery must be fully discharged before it is recycled. The auto-ranging feature guarantees the maximum possible total discharge though the high load current, even with voltages under 2 V. The mains feedback to the power grid at up to 96% efficiency, makes this process highly cost effective.