Series HCB from 1.25kV to 20kV / 1.4W to 200W


  • light-weight
  • in units with 6,5kV and higher the HV-components are moulded in (removable) silicon resin
  • short-circuit and flash over proof
  • unlimited operation with rated current in a short-circuit condition
  • voltage regulation and current limitation with automatic, sharp transition, control modes indicated by LEDs
  • voltage adjustment with 10-turn potentiometers with precision scale; the adjusting knob can be locked
  • 4½ digit DVM for voltage and current
  • set point adjustment possible with locked output, release of output voltage by means of an "ON" / "OFF" switch
  • 4-quadrant operation possible also for active loads and unlimited power sinking
  • suitable for capacitive and resistive loads


Bipolar HV power supplies consist of 2 switch-mode controlled HV sources which are connected to the output. In principle, the rectified line voltage in each source drives a square wave generator of fixed frequency, whose AC voltage is transformed, rectified and filtered, producing the positive or negative output voltage. For regulation, the square wave voltage is pulse width modulated. The operation is contra-moving, and the output can be adjusted with continuous zero crossing.


  • 19" table-top case (19" rack adaptors available)


Output isolation One output terminal leads the high voltage, the "0V" terminal is connected firmly to earth. If required, the "0V" terminal can be made floating against earth up to ±300V.
Output terminals All output terminals are located at the rear plate of the unit. High voltage connectors with the appropriate dielectric strength are delivered with the power supply

Technical Data:

Mains connection ≤ 700W: 230V ±10% 47Hz to 63Hz
≥ 1400W: 400V±10% 47Hz to 63Hz, three phase
Ambient temperature 0°C to +40°C

The following data applies for voltage and current regulation, and refers to the rated value, unless otherwise stated. (For explanations please refer toTerms and Definitions)

Setting range from -100% to +100%
Setting resolution ±1 x 10-4
Residual ripple (0-10MHz) < 3 x 10-4pp + 50mVpp, typ. 2 x 10-4pp
Recovery time for voltage control < 1ms for load changes from 10% to 90% or from 90% to 10%
Setting time at nominal load < 200ms

for ±10% mains voltage variation:
< ±2 x 10-5

for no load / full load:
< 2 x 10-4

over 8 hours under constant conditions:
< ±2 x 10-4

within the temperature range:
< ±2 x 10-4 / K


Analogue programming All FuG power supplies are optionally available with an analog programming 0-10V (Standard with the series HCE and HCN 7E). This option is also available as retrofit set.
Computer interface IEEE 488, RS 232, RS 422, Profibus DP, USB, LAN (more on request)
Higher stability Voltage and/or current regulation with better long-term stability and lower temperature coefficient.
Lower ripple On several series a lower ripple can be achieved by better smoothing. This option can be supplied only with new units. A later modification is not possible. For an order with this option applies.
Lower stored energy and shorter control time Especially for the operation of gas discharge processes, arcs or similar loads with a negative dynamic resistance characteristic, the quantity of stored energy can be decreased by smaller output capacitors. Those units will have than a higher ripple up to 1%.