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OL20K Series
Photo of XS Series Power Supply

20kW High Voltage Power Supply

The Series OL20K is a range of high reliability, high voltage power supply systems designed to meet the rigorous requirements of Ion and Electron beam systems. These high performance switch mode systems are based on a power converter using zero-volt switching. A full bridge of the latest generation of Insulated Gate Bipolar Transistor (IGBT) technology in a fully regulated close-loop system capable of continuously supplying up to 20kW of output power, while maintaining flexible control down to a few hundred watts. These highly reliable, rugged systems comprise two units: a rack mounting or free-standing power converter, through which remote controls are facilitated, and a separate HV unit employing a modular disc construction.  Numerous features are incorporated to ensure system integrity is maintained during adverse operating conditions.

Model-Specific Downloads

OL20K series brochure

Typical Applications Features
  • Ion implantation
  • Ion vapour deposition
  • Chemical vapour deposition
  • Electron beam welding
  • Electron guns
  • High voltage testing
  • Particle accelerators
  • 20kW max output power
  • Outputs available from 60kV to 200kV
  • 208VAC or 400VAC input voltage to order
  • Positive or negative polarity
  • Robust IGBT converter design
  • Exceptional reliability
  • High stability
  • Excellent inherent ruggedness
  • Arc and short circuit protected
  • CE marked
  • RoHS available on request
Voltage 208VAC ±10% (187VAC to 229VAC) 47-63Hz 3 phase via three M8 studs, and earth, via M10 stud at 87A rms per phase
400VAC ±10% (360VAC to 440VAC) 47-63Hz 3 phase via three M6 studs, and earth, via M8 stud at 45A rms per phase
Minimum voltage 5% of rated output voltage.  The unit may be turned down below this but the specifications are not guaranteed below this level.
Output and Ordering Info Model No Input Voltage Output Voltage Output Current (Max) Output Power
  OL20K/603 208V 60kV 250mA 20kW
  OL20K/803 208V 80kV 240mA 20kW
  OL20K/104 208V 100kV 200mA 20kW
  OL20K/124 208V 120kV 160mA 20kW
  OL20K/144 208V 140kV 130mA 20kW
  OL20K/164 208V 160kV 110mA 20kW
  OL20K/184 208V 180kV 90mA 20kW
  OL20K/204 208V 200kV 80mA 20kW
  OL20KE/603 400V 60kV 250mA 20kW
  OL20KE/803 400V 80kV 240mA 20kW
  OL20KE/104 400V 100kV 200mA 20kW
  OL20KE/124 400V 120kV 160mA 20kW
  OL20KE/144 400V 140kV 130mA 20kW
   OL20KE/164 400V 160kV 110mA 20kW
  OL20KE/184 400V 180kV 90mA 20kW
  OL20KE/204 400V 200kV 80mA 20kW
Line regulation (VDC) Less than 0.01% change in output voltage for a 10% change in mains voltage
Load regulation (VDC) Less than 0.1% of rated output voltage for a 10% change in mains voltage
Ripple Less than 0.1% peak to peak of rated output voltage
Transient response The output will recover to within ±1% of set value in less than 100 rms from the removal of a short circuit
Polarity Positive or negative to order

Temperature coefficient 200ppm/°C (0.02%/°C)
Drift Less than 0.5%/8 hours after 1 hour warm up
Front panel controls and indicators
  • Circuit breaker HV On indicator
  • HV Off indicator
  • Trip indicator
Operating temperature 0°C to+ 40°C (32°F to 140°F) ambient and air intake
Storage temperature -20°C to +85°C (-4°F to 185°F)
Humidity 80% maximum relative humidity up to 31°C, reducing linearly to 50% at 40°C.  Non-condensing (ref BS EN61010-1)
Safety The OL20K high voltage power supplies meet the requirements of the Low Voltage Directive, LVD, 73/23/EEC, by complying with BS EN61010-1:2001 when installed as a component part of other equipment.  It is CE marked accordingly. 
Usage Indoor use only
Installation category II (BS EN61010-1)
Pollution degree 2 (BS EN61010-1)
RoHS The OL20K is currently built to non-RoHS standard.  This unit can, however, be configured to meet the requirements of RoHS where significant customer demand requires it, although please note that this will have an impact on delivery timescales.
Altitude Sea level to 2000 metres (6500 feet)
Protection The units are fully protected against over temperature, over voltage, over current, load arcing and output short circuits.  The ACE system can be installed to give added arc management functionality.
Vibration In accordance with BS EN60068-2-6: 1995
Transport, when contained in the original packaging.
Frequency range: 10Hz to 500Hz
Acceleration: 20 ms/s2 crossover at 58Hz (table C.2)
Displacement: 0.15mm maximum
Test conditions as defined in table A.1
Control The power supply is operated by remote control via the 25-way D-type connector situated on the rear panel of the converter.  Full control and monitoring functions are available by this method.  Application of 0 to 10V to the voltage and current control lines programmes the unit for 0 to 100% of rated output.  Similarly 0 to 10V signals provide monitors of the output voltage and current levels.  HV ON/OFF is obtained by shorting two terminals and status lines are provided by open collector outputs.


Accuracy of specifications in unlocked documents cannot be guaranteed. Please contact your AE representative to confirm specifications.