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DDX 9121b

by Haefely Hipotronics 

Catalog ID: DDX 9121b

Multichannel PD Detector / RIV

More Information


The DDX 9121b is the latest in the DDX family for  partial discharge & radio interference voltage testing.  With the DDX 9121b, users can control, test, monitor  and generate test reports from a single computer.

  • AC and DC measuring modes
  • Data acquisition and test report generation.
  • Embedded switch with four PD inputs per detector.
  • High resolution spectrum analyzer with oscilloscope.
  • Modular design, 1 to 9 detectors- easily upgradable.
  • PD patterns like Φ-q-n (phase, magnitude, occurrence)
  • PD Site Location (SL) on cables
  • Simultaneous RIV and PD reading.
  • User defined measuring band

  • Reduces ground noise - The built in frequency spectrum analysis and selectable frequency band let the user optimize the setup in seconds.
  • Optimizes investment if needs change. Unit can be easily upgraded (RIV, 4 inputs switch, simultaneous PD readings, PD on DC, etc.)
  • Reduces training time -The Windows based software makes the use of the device easier than ever. Operators can start using the device in minutes.
  • Straightforward replacement -replacement is as simple as removing the obsolete PD detector and measuring quadruple and installing the DDX 9121b.
  • PD interpretation - The phase resolved analysis and recording capabilities allow for future data analysis.
  • Easy to integrate into test systems - Its compact design standard BNC measuring cables and remote control capabilities make it ideal for an integrated PD test system together with an AC power supply.


Application Power and Distribution Transformers;Instrument Transformers;Rotating Machines;Power Capacitors;Cables;Switchgears;Surge Arrestors;Research & Development