4kW PCUs offer low noise and ripple

3rd October 2014

Siobhan O'Gorman

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Glassman High Voltage has released a series of 4kW open stack PSUs. The air-insulated LH series of PSUs feature low noise and ripple, which is typically less than 0.1% peak to peak of rated voltage at full load. By using air as the primary dielectric medium, weight is minimised and servicing is made easy as no oil or other encapsulation is used.

After each load arc, the HV output is inhibited for a short period to help remove the arc. The internal circuitry constantly senses and integrates arcs that occur over a given time. Should a load arcing problem develop, the power supply will cycle off, and then automatically restart. To enable line and load variations, voltage regulation is better than 0.005%. From short circuit to rated voltage, current regulation is better than 0.1%. Devices are parallelable: one master supply and up to four slave supplies provide a maximum of 12-20kW depending on kV.

Providing high efficiency and a reduced parts count for improved reliability, the PCUs offer off-the-line pulse-width modulation. For protection against overloads, arcs, and short circuits, automatic crossover from constant-voltage to constant-current regulation is enabled. RS-232, USB or, optionally, Ethernet communications allow for remote control programming and monitoring.

The stack series, which is compliant with EN61010/ IEC1010, EN61000-6-4, and EN61000-6-2:2005 European Directives, consists of a rack style driver chassis, a high voltage stack assembly and a remote control unit. Glassman offers standard power supplies with a three year warranty and OEM/modified power supplies with a one year.