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Grid-Tied Bidirectional DC Supply

LAB-GSS: Grid-Tied Bidirectional DC Supply
Max. Voltage Model 1500V
Min. Power Model 20kW
Max. Power Model 2MW
Technology Switch Mode
Case Style Rack Mount

The LAB-GSS is able to operate as either a DC source or an electronic DC load. This new integrated approach features high dynamics enabling the user to switch quickly between quadrants. When sinking energy from the unit under test the LAB-GSS automatically inverts the DC to AC and synchronises this output to the grid. A variety of control methods are available. As standard each module is built with isolated analogue and RS-232 interfaces. Front panel control and display along with IEEE 488.2 (GPIB), USB, RS-422, CAN & Ethernet interfaces are optionally available. A comprehensive software program is provided for operation over the serial or LAN interface. Along with standard output settings the GUI gives access to a host of second level parameters. Voltage and current slopes can be set and protection levels tweaked. Sense compensation can be programmed and PID controllers adjusted. This helps ensure that the LAB-GSS can be optimised for particular applications.

A useful bonus is the built in 4-channel recording scope for seeing what is actually on the output. Trigger events, such as a particular current or power level, can be selected. The time resolution and number of sampling points can also be adjusted. Previous scope traces together with the channel and trigger configurations can be imported back into the GUI for analysis.

The optional embedded function generating engine is an ideal tool for creating and implementing complex waveforms. Standard sine, square and sawtooth shapes can be plotted against time for voltage, current and power outputs. User defined waveforms along with parametric programming is also possible. This allows curves to be set where one output quantity is automatically adjusted depending on the value of another. Waveforms can be exported to the memory of the LAB-GSS and implemented from the front panel. Another useful feature is that the internal resistance of the LAB-GSS can be adjusted. This makes these bidirectional units ideal for simulating li-ion and fuel cell stacks along with the cycling of other storage devices such as ultra capacitors and battery packs. Automotive, hybrid and converter drive testing is another important application area for the LAB-GSS.

With their compact size and 2-quadrant operation these are very versatile instruments for every modern power testing laboratory. High power systems can be specified. The modular concept means systems can be easily expanded or reconfigured as required. A full cabinet integration service is available on request.

Did you know...
  • Parallel, series and matrix/multiload master-slave operation allows up to eight LAB-GSS units to be connected together for a simple way to increase available power.
  • The LAB-GSS mains ReGen capability allows the unit to return the load power to the grid where it would usually be dispensed as heat. Feeding the grid in this manner is compliant with EN50438 and VDEO126. Its ER G59-3 testing meets the requirements for connection to UK mains.
Product Family
 Part NumberNominal PowerSource Voltage Q1Sink Voltage Q4Current Range
LAB-GSS 20-40020kW0 - 400Vdc50 - 400Vdc0 to ±63A
LAB-GSS 20-50020kW0 - 500Vdc40 - 500Vdc0 to ±50A
LAB-GSS 20-60020kW0 - 600Vdc50 - 600Vdc0 to ±40A
LAB-GSS 32-40032kW0 - 400Vdc50 - 400Vdc0 to ±100A
LAB-GSS 32-50032kW0 - 500Vdc40 - 500Vdc0 to ±80A
LAB-GSS 32-60032kW0 - 600Vdc50 - 600Vdc0 to ±66A
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Different output ranges and application/user specific options are possible. Please contact ETPS to discuss your requirements.
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