Series HCK from 2kV to 65kV / 100W to 20kW


  • efficiency approx. 90%
  • in units of 20kV and higher, the HV-components are moulded in (removable) silicon resin; from 35kV / 5000J/s on, the HV-components are isolated in oil
  • continuous charging or triggered charging via potential free external trigger input selectable (opto-coupler input for 12-24V)
  • charging with adjustable constant current without overshoot
  • voltage and current setting by 10-turn potentiometers with precision scale; the adjusting knob can be locked
  • suitable for continuous or compensation charging
  • no external protection resistor is required
  • permanent short-circuit proof
  • 4½ digit DVM for charging current and output voltage (for table-top models)
  • pre-selection of the output voltage with display
  • end of charge signal, when the final voltage is reached, via front panel LED and a potential-free interface for signalling to an external control system (opto-coupler output)
  • suitable for capacitive loads with resistive elements
  • the nominal current can be permanently supplied at maximum output voltage


The capacitor charging high voltage DC power supplies are designed specifically to the requirements of capacitor charging or capacitor conditioning, i.e. they have a more heavily designed output resistor to withstand a pulsed load and a regulating circuit, optimized for fast switching over between current and voltage regulation and vice versa. In principle, the rectified line voltage drives a square wave generator of fixed frequency, whose AC voltage is transformed, rectified and filtered, producing the output voltage. For regulation, the square wave voltage is pulse width modulated.


  • up to 2500J/s nominal power 19" table-top case, higher power in 19" cabinets (depending on type) with oil isolated external HV-container


Output isolation The polarity is positive or negative and has to be indicated with the order. The "0V" terminal of the output is connected to earth but may be disconnected as needed. When disconnected, the "0V" (earthy) terminal may float with respect to earth up to ±300V.
Output terminals For all HCK units the output is on the rear side of the unit or on a separate HV-container. Mating HV-connectors are included, from 35kV on, assembled with 3m cable, from 65kV >5000J/s on with 10m cable.

Technical Data:

Mains connection ≤ 800J/s: 230V ±10% 47Hz to 63Hz
≥ 1600J/s: 400V ±10% 47Hz to 63Hz, three-phase
Ambient temperature 0°C to +40°C
Charging power The specified max. charging power (see table) will be supplied for charging between "0" and the rated voltage. For charging of a partially discharged capacitor a considerably higher charging power, up to the double, can be supplied.
Setting range for the charging voltage from approx. 1% to 100%
Setting resolution ±1 x 10-4
Reproducibility of the charging voltage with respect to the rated value

for ±10% mains voltage variation:
< ±1 x 10-4

over 8 hours under constant conditions:
< ±1 x 10-3

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

for a repetition frequency of < 10Hz:
< ±1 x 10-3

for a repetition frequency of > 10Hz:
< ±1 x 10-2

Repetition frequency max. 100Hz
Residual ripple of the charging current approx. 10%pp (20kHz/40kHz)


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.
Polarity reversal By this switch the polarity of the output voltage of a high voltage power supply (Nearly all of the HCP, HCL, HCN, HCK, HYN) can be changed.
Dump switch for the output & the load Dump switch for the output & the load
Higher repetition frequency Higher repetition frequency
Discharge circuit for pulse operation Built-in or external discharge circuit for pulse operation