TTi has enhanced its best-selling CPX400 laboratory dc power supply by extending its voltage range to 60V. The new model, designated CPX400A retains the 840 watt power capability of the CPX400, but can supply up to 60 volts instead of the 42 volts maximum of the previous model.

The TTi PowerFlex design offers a constant-power capability allowing higher output current at lower output voltages. A conventional bench PSU has a fixed current limit giving a power capability that reduces directly with the output voltage. The design of the CPX400A enables higher currents to be generated at lower voltages within an overall power limit envelope.

Each output can provide 60 Volts at a maximum current of 7 Amps. As the voltage setting is reduced the output current capability increases up to a maximum of 20 Amps. This is achieved by using a mixture of switch-mode and linear technologies. Special techniques are used to achieve noise and RFI figures comparable with good linear PSUs. As a result the CPX400A can be used with confidence in sensitive environments.

The CPX400A is a dual output PSU with two completely independent and isolated outputs each with a 420W capability. The outputs operate in constant voltage or constant current mode with automatic crossover and mode indication. Each output has its own on-off switch. If required, the outputs can be wired in series or parallel to achieve voltages up to 120V or currents up to 40A.

The PSU offers a choice of remote or local sensing selected via a front panel slide switch. Remote sensing is essential for users of higher current power supplies who need to ensure good regulation at the load, independent of connection leads.

The new PSU is designed and manufactured to meet the latest safety and EMC standards.
Comprehensive protection includes an adjustable over-voltage trip for each output. This can be accurately set anywhere in the range 3.5V to 67V.

The CPX400A is housed in a compact and robust steel case which is half-rack width and takes up very little bench space. The size is 210 x 130 x 350mm, and the weight is 7kg.


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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