TT&MS BV has expanded its power division with the latest QL series from H&H. This QL series is a completely new line of bipolar power supplies with new functionality, which can function in 2 or 4 quadrants depending on the model.

The bipolar power supplies of the QL series have a “SOURCE” and “SINK” mode, which means that the device can be used both as a power supply and as an electronic load. Besides being used as a DC source, the 4-quadrant version is also suitable as an AC source. The QL series can also be used as an analogue amplifier, suitable for capacitive and inductive loads.

Such power supplies are used when testing a wide range of Energy Storage Devices (charge/discharge), motors, chargers or coils. The standard portfolio offers devices with 2 or 4 quadrants up to 3,600 W. A notable feature is the “modulator” with which in CC or CV mode a sine, square wave, triangular or random signal can be modulated. Frequency and modulation depth are adjustable. In addition, the QL series is suitable for determining the internal resistance Ri of a DUT. As a simulator, the QL series models can also be used to program a Ri and to define charge/discharge parameters.

Standard the units can be controlled analogue or remotely via LAN, CAN, RS232 and USB.

For more information about this bipolar power supply we refer you to the datasheet.


Arnold Memelink

Arnold Memelink


"The ABB Power Grids Jumet organisation is an innovative development and production facility of ABB that manufactures active filters and battery energy storage systems to support a stable grid. To test these systems we have acquired two Cinergia GE/EL +120kVA eplus units capable of doing grid emulation (AC + DC), operating as an electronic load (AC +DC) and being a battery emulator. We have experienced very good support from TTMS in obtaining these two Cinergia units. This included organising an on-site demonstration and supplying loan systems prior to the delivery of our final systems. This way we could start testing as early as possible. TTMS also organised training for the operators from the original manufacturer. This support allowed us to introduce the first battery energy storage systems even prior to the full delivery of the Cinergia systems."

University of Luxembourg

Sasan Rafii-Tabrizi

University of Luxembourg

“At the Energy and Environment department of the Faculty of Science, Technology and Medicine (FSTM) of the University of Luxembourg we do have different research projects related to green energy contributing to the development of eco-cities. As a long-standing partner of our research unit, TT&MS has proven that they are able to answer even the most complex questions in a professional manner. They have shown that they are always up to date with the latest technology and do not spare any effort to look at the application and even the situation on site. The exchange of ideas was always very pleasant and took place quickly. We look forward to further years of fruitful cooperation.”


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