EA-ELR 10920-60 3U US208V Elektro-Automatik DC Power Supply New

The Elektro-Automatik ELR10920603UUS208V Programmable DC Electronic Load feeds consumed DC energy back into the local or public grid with an efficiency approaching 100%. The ELR 10920-60 3U US208V also allows operation on practically all global mains voltages. The rated DC voltages and currents are determined by typical applications and the spectrum ranges in a single device. The DC input operates as a flexible input stage with a constant power characteristic (auto ranging) and a wide voltage and current range. To achieve higher powers and currents ELR 10920-60 3U US208V is equipped with a master-slave bus. This allows for up to 64 parallel connected devices working as one system which can provide a larger load. Such a system works as a single unit and can use different power classes, only the voltage class must remain constant. Furthermore, this unit provides typical laboratory functionality, including an extensive function generator, alarm and warning management, various industrial interfaces, software solutions, and more.

The ELR 10920-60 3U US208V electronic load is equipped with an active PFC which provides a high efficiency at a low energy consumption. Furthermore, the device provides a wide input voltage range. Hence, the devices can be operated in the majority of global grids. It also adjusts automatically, without additional configuration, to the available grid voltage.

The energy consumed in load mode is fed back into the connected grid. As the energy is not converted to heat (as with other loads), this feature reduces energy costs. In addition, the device generates less heat, requiring less cost-intensive air conditioning.

In the context of a typical application, a "device under test" (DUT) consumes energy from the mains, then converts it to DC and feeds that back into the device. The ELR 10920-60 3U US208V electronic load converts this energy back into an AC current and feeds it back into the grid. The flexible input stages (auto ranging) provide the user with a wide voltage, current and power range - and a wider field of working than traditional power supplies.

Connection of the DC input is done via copper blades on the back side of the device. If a system with higher performance is required, the device is simply connected in parallel. With minimal effort, the ELR 10920-60 3U US208V can be linked with the vertical copper rails.

"Auto ranging" is a term used when a programmable electronic DC load automatically offers a wider input range of both, voltage and current, to maintain full power across a wide operation range. This type of solution allows the use of a single unit to address multiple voltage and current combinations.

The ELR 10920-60 3U US208V is also equipped with a function generator. This allows curve processes such as sine, triangle, square or trapezoid to be simply called up. A ramp function and an arbitrary generator allow voltage and current progression to be freely programmable. Test sequences for repeated tests can be saved on USB thumb drives and reloaded when needed. As an extended function of this arbitrary generator, the electronic load can simulate the tracking behavior of a solar inverter, allowing users to test solar panels and modules with a wider range of voltages and power.

As standard, ELR 10920-60 3U US208V 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, for voltage, current, power and resistance, assorted inputs and outputs, as well as USB and Ethernet ports.

A 19 in. cabinet with a height of 42U can hold up to 12 units of 3U and thus form a system of up to 180 kW occupying only 0.6 m² (6.5 sq/ft) of floor space. The master/slave bus allows for up to 6 cabinets with a maximum of 64 units and up to 15 kW each to behave as one unit.

When the integrated master-slave bus and Share bus are used, a multi device system behaves as a single device. The buses are simply connected between each device. With the master-slave bus the system data, such as total power and total current, are collected and displayed on the master unit. Warnings and alarms on the slave devices are also clearly displayed. The Share bus cares for a balanced load distribution between the individual units.

Applications

Battery tests for electro mobility: A typical application for the ELR 10920-60 3U US208V unit is testing electrical characteristics of a battery. The wide application spectrum covers cell tests, module or pack tests, the determination of the SOH (State-of-Health) for a second life classification, as well as the end-of-line (EOL) test. These applications put many demands on power electronics which are fulfilled by the device's wide range.

Fuel cell tests: The ELR 10920-60 3U US208V can be used for testing the electrical features of fuel cells, fuel cell stacks and fuel cell systems. Here they 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 test system. The feedback capability guarantees high level of energy and cost efficiency. For the higher currents that are required for testing a complete fuel cell system, multiple devices can be connected in parallel, in a master-slave system.

On-board charger tests: In an on-board charger test (OBC) the electrical features of the charger must be tested under various conditions. This requires a flexible test system which also provides test data. With the sequencing and logging functions of EA-Power Control software, data to 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 the testing device, the voltage regulation speed of the electronic load is adjustable. The modes Normal, Fast and Slow allow the ELR 10920-60 3U US208V to adapt the control characteristics of the on-board charger.

Battery recycling: In combination with EA-Power Control software, it is possible to assess whether or not retired batteries from electric vehicles can be repurposed. Assessment of a battery pack starts with a state of health (SOH) check to determine if a second life is feasible. This integrated function can be initiated with one click. If this check shows too little rest capacity, then the battery must be fully discharged before recycling. The auto ranging of the devices guarantees the maximum possible total discharge, even with voltages under 2 V.