Corona Probe
Iris Power Corona Probe

Iris Power Corona ProbeTM

Model PPM-97


  • Offline PD test for locating activity in the winding
  • Precisely locates PD to a particular stator slot and position
  • Locates partial discharge with the winding energized phase by phase
  • Portable, light-weight and easy to use
  • Recommended in IEEE® Standard 1434™


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Product Description

The Iris Power Corona ProbeTM Model PPM-97 is a portable, battery operated instrument for off-line detection of partial discharge in rotating machinery. The instrument, with its ferrite probe, is designed to measure partial discharge pulses. The corona probe test is a valuable aid for detecting the presence of abnormal partial discharges in stator winding insulation. It is one of the best tools for pinpointing the exact location of PD activity within the core sections of a stator winding.

The Iris Power PPM-97 Corona Probe supplements on-line PD measurements by more precisely locating the PD to a particular slot and position, with the winding energized phase-by-phase using a high voltage AC source. Alternatively, it can be used as a stand-alone PD test for locating activity in the winding where no other PD information is available. The Iris Power Corona Probe can also be used to check the quality of bonding between groundwall insulation layers in the slot sections of new resin-rich and individually VPI’d coils/bars, and the adequacy of slot resin fill in global VPI windings.


  • Tuned to partial discharge frequencies
  • Battery operated
  • Light-weight and portable

Kit Contents

  • Probe with peak pulse meter
  • Ground Strap
  • Carrying Case
  • Operating Manual
Bandwidth 0.5 – 10 MHz
Ranges 10 / 30 / 100 / 300 / 1000 mA Peak and Battery Check
Effect of Battery Voltage Reading decreases approximately 10% as the battery output drops from 9V to 7V. The instrument will operate satisfactorily if the battery voltage is >6V
Dimensions (meter only) 9cm x 15.5cm x 4.5cm
Weight (meter only) 445 grams
Probe Length 91cm
Input Connection BNC receptacle
Ground Connection Metal 5-way binding post
Batteries 9V long-life (2)

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DISCLAIMER: The technical information contained herein is the result of extensive testing in the manufacturer’s laboratories. In addition any application advice given verbally, in writing or by testing corresponds to the best of our knowledge and belief. Since the use and application of any of our products lies beyond our area of control, it remains the responsibility of the user to verify the product’s suitability for their application.

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