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High Voltage Cassette Power Supplies

Series HCE from 125V to 35kV / 7W to 350W

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.

 
Mains connection 230V ±10% 47Hz to 63Hz
Ambient temperature 0°C to +40°C
Setting range from approx. 0.1% to 100%
Residual ripple (0-10MHZ) < 1 x 10-4pp + 50mVpp, typ. 5 x 10-5pp
Recovery time Voltage control: < 1ms for load changes from 10% to 100% or from 100% to 10% Current control: < 10ms for load changes causing an output change of less than 10% of the rated voltage
Setting time at nominal load < 200ms for changes of the output voltage from 10% to 90% or 90% to 10%
Discharge time constant for output without load approx. 0.5sec. to 5sec., depending on type
Deviation for ±10% mains voltage variation: < ±1 x 10-5 for no load / full load: < 2 x 10-4 over 8 hours under constant conditions: < ±1 x 10-4 within the temperature range: < ±1,5 x 10-4 / K Voltage and current adjustment by screwdriver or via analog programming.
 
  • Compact size
  • light-weight
  • for units from 6.5kV nominal voltage on, all HV components are moulded in (removable) silicon
  • short circuit and flashover proof
  • unlimited operation with rated current in a short-circuit condition
  • unlimited operation with rated power
  • voltage or current regulation with automatic transition
  • control mode indicated by LEDs
  • screwdriver adjustment of voltage and current on the front panel
  • standard analog programming plus HV ON/OFF input and monitor outputs
  • measuring terminals for voltage and current monitors on the front panel
  • suitable for use with capacitive loads
  • suitable for use with photomultipliers
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