• Voltage: 0 - 750 V

• Current: 0 - 20 A
• Power: 5000 W
• High efficiency of up to 95.5%
• Autoranging output stage

The microprocessor-controlled high efficiency laboratory power supplies of series EA-PS 9000 3U offer many functions and features in their standard version, making the use of this equipment remarkably easy and most effective.

The clearly arranged control panel features two rotary knobs, six pushbuttons and two LEDs. Together with a color TFT display for all values and status it simplifies the use of the devices.

In order to achieve even higher output power than the single units can supply, cabinets with up to 150 kW and up to 42U size can be configured to suit the users requirements.

AC supply

All models are provided with an active Power Factor Correction circuit. There is a choice of three different AC supply input ranges. The standard models run with 400 V (L-L, ±15%), while there are also models for 208 V (L-L, ±10%), for the US and Japan market. The third choice are wide range (WR) models with 342...528 V, which cover typical worldwide grid voltages of 380 V, 400 V and 480 V.

Power

The devices are equipped with a flexible autoranging output stage which provides a higher output voltage at lower output current, or a higher output current at lower output voltage, always limited to the rated power. Therefore, a wide range of applications can already be covered by the use of just one unit.

Discharge circuit

Models with a nominal output voltage of 200 V or higher include a discharge circuit for the output capacities. For no load or low load situations, it ensures that the dangerous output voltage can sink to under 60 V DC after the DC output has been switched off. This value is considered as limit for voltages dangerous to human safety.

Protective features

For protection of the equipment connected, it is possible to set an overvoltage protection threshold (OVP), as well as one for overcurrent (OCP) and overpower (OPP). As soon as one of these thresholds is reached for any reason, the DC output will be immediately shut off and a status signal will be generated on the display and via the interfaces. There is furthermore an overtemperature protection, which will shut off the DC output if the device overheats.

Display and controls

All important information is clearly visualized on a color TFT display. With this, information about the actual output values and set values of voltage and current, the actual control state (CV, CC, CP) and other statuses, as well as alarms and settings of the setup menu are clearly displayed.

In order to ease adjusting of values by the rotary knobs, pushing them can switch between decimal positions of a value. All these features contribute to an operator friendliness. With a panel lock feature, the whole panel can be locked in order to protect the equipment and the loads from unintentional misuse.

Extensibility

The single units can be combined into various configurations upon request and in cabinets of up to 42U height, in order to build parallel systems of up to 450 kW total power.

Digital and analog interfaces

All models features two galvanically isolated, digital interfaces by default (1x USB & 1x Ethernet), which are located on the rear side. With option 3W there will be a GPIB port instead of Ethernet. All three digital interfaces can be used to control and monitor the devices either with SCPI language commands or ModBus RTU protocol (not via GPIB). There is furthermore a galvanically isolated analog interface port, also on the rear of the device. It offers analog inputs to set voltage, current and power from 0...100% through control voltages of 0...10 V or 0...5 V. To monitor the output voltage and current, there are analog outputs for voltage ranges of 0...10 V or 0...5 V. Also, several status inputs and outputs are available.

The standard sensing input can be connected directly to the load in order to compensate voltage drops along the power cables. If the sensing input is connected to the load, the power supply will adjust the output voltage automatically to ensure the required voltage is available at the load.