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by Haefely Hipotronics 

Catalog ID: 9230/20/1-PD

9230/20/1-PD - Coupling capacitor 20 kV for Partial Discharge MeasurementThe coupling capacitor (PSF - Power Separation Filter) type 9230/20/1-PD includes in a compact design the high voltage capacitor, the high voltage filter and the measuring impedance. It is optimized for measuring partial discharges together with the PD detector DDX 9121b.An incorporated half-T filter on the high voltage electrode attenuates the interferences coming from the power supply and increases the sensitivity of the PD measuring circuit. The filter is protected from overvoltage by a mechanical spark-gap.

  • All in one solution including the coupling capacitor, the HV filter, and the measuring impedance
  • PD free (less than 1 pC)
  • Voltage/synchronization output
  • Portable and perfect solution for onsite measurements of rotating machines (together with MIDAS and DDX 9121b)

Product Details


  • BNCTwin/20 BNC twin cable (2 x BNC), 50 Ohm, 20 m length.
  • BNCTwin/40 BNC twin cable (2 x BNC), 50 Ohm, 40 m length
  • Rotating Machines
  • Component testing
  • Circuit Breakers
  • Surge Arrestors
  • Research and Development

Certifications and Compliance

Industry Standard(s)
  • IEC 60270
  • IEC-60060
  • IEC-885-2 and IEC-885-3
  • ICEA T-24-380
  • ASTM D1868-93