• Power: 400W
• Voltage: 500V
• Current: 10A
• Built in function generator

The Elektro-Automatik EA-EL 3000 B series are compact electronic DC loads with a 400 watt capacity. This series offers new voltage and current ratings for a multitude of applications, as well as daily use in laboratories, schools or workshops. The following is an overview of available models:

All models support the four regulation modes constant voltage (CV), constant current (CC), constant power (CP) and constant resistance (CR). The core of the control circuit is a fast microprocessor that provides interesting features, such as a true function generator with common functions like rectangle, triangle or ramp. The color display, together with a keyboard and two rotary knobs provides the user an intuitive kind of manual operation and better overview.

Response times during device control via analog or digital interface have been improved by an ARM processor-controlled hardware, compared to older electronic load series.

Digital interfaces, such as USB and Ethernet, are available as an optional accessory, as well as analog one. All interfaces are galvanically isolated. Remote control and implementation into custom applications for every purpose are simplified by the common protocols SCPI and ModBus RTU, as well as by ready-to-use LabView components.

Manual operation is done with a color display, two rotary knobs and six pushbuttons. The large display shows all relevant set values and actual values at a glance. The whole setup is also done with the human-machine interface, as well the configuration of functions (square, triangle and others) etc. The display is multilingual (German, English, Russian, Chinese).

Battery test

For purposes of testing all kinds of batteries, such as for example constant current or constant resistance discharging, the devices offer a battery test mode. It counts values for elapsed testing time and consumed capacity (Ah) and energy (Wh). Data recorded by the PC during tests with EA Power Control can be exported as an Excel table in CSV format and analyzed later in MS Excel or similar tools and even visualized as a discharge diagram. For a more detailed setup, there is an adjustable threshold to stop the battery test on low battery voltage, as well as an adjustable test period.

MPP tracking

For photovoltaics-related tests, there is another function included as standard. Four modes allow for simulation of the typical characteristics of solar inverters being connected to solar modules or panels. The function is used to determine typical operation parameters, such as the so-called Maximum PowerPoint and the related values UMPP, IMPP and PMPP. One of the modes even offers particular analysis with different irradiation values in form of a table with 100 points.

For remote control, there are three types of interface cards optionally available which can be quickly and easily installed by the user on the location:

• USB
• USB + Ethernet
• USB + Analog

Using the digital interface (USB, Ethernet), Windows users can profit from the free software "EA Power Control". It offers a feature called "Sequencing", where the device is controlled through a semi-automatic table in CSV format. This table represents a simple test procedure and can be created and edited in MS Excel or other CSV editors and then imported into the software tool. This software also allows for the control of up to 20 units at once with an optional feature called "Multi Control" (licensed, not free of charge). See page 110 for more information. 

Interface cards with USB, Ethernet or analog port, all plug 'n play and retrofittable

• USB
• USB + Ethernet
• USB + Analog