DeltaMaxx – Digital PD, Dielectric Loss Factor and Capacitance Analyzer

Offline Digital Partial Discharge, Dielectric Loss Factor and Capacitance Analyzer

Product Overview

The Iris Power - PDTech Deltamaxx instrument is an integrated system that measures dissipation factor, capacitance and partial discharges in stator bars, coils and complete stator windings.

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Works with the Following Assets
Assists with the Following Type of Monitoring

Loss Factor / Capacitance Test

The PDTech DELTAMAXX system measures current through a reference capacitor and test object. The current is measured by the voltage drop across shunt resistors. A 16-bit A/D converter processes these voltages. The phase angle difference between the high voltage and this current is determined by a novel algorithm, which allows the calculation of the loss angle and automatic elimination of several potential error sources.

Partial Discharge Measurement

The DELTAMAXX is configured to extract Partial Discharge pulses from the coupling capacitor internally. Partial Discharge measurement does not require external shunts or additional components, that is, coupling impedance, pre-amplifier, signal processing, and digitising all takes place in the measuring unit.

Product Details


Specifications For TANd/C Measurement

  • Test Frequency: 10 to 100Hz
  • Maximum Current: depends on external components (shunts), standard is 10A, 50 mA and 2A also available.
  • Reference Capacitor: 1nF nominal up to 20 kV at 23°C, correction in settings, see QA certificate for precise values
  • tanδ: 10-5 (resolution)
  • Error: Tand:  1-2⋅10-4 (uncertainty), Capacitance 0.5% at 5V input at 23°C
  • Display Units:  selected via user interface
  • Power Supply:  Via USB (for PD Module external power required)
  • Harmonics:  Numerically rejected by software algorithm
  • Interface USB:  PC requirement: Desktop or Notebook, Windows XP, 512 MB (min)
  • Test Voltage Range: 15kV (DELTAMAXX 15), 20kV (DELTAMAXX 20), 30kV (DELTAMAXX30), 50kV (DELTAMAXX50)

Specifications For Partial Discharge Measurement With Integrated Coupling Capacitor

  • Test Frequency: 10 to 100Hz (HV Frequency Range)
  • Coupling Capacitor: 1nF nominal up to 20 kV at 23°C, see QA documents
  • Coupler Impedance:  Integrated high-voltage isolation transformer
  • PD Band Pass:  Designed according to IEC60270, 40-800kHz
  • PD Ranges:  Depends on version and test object and noise, 10pC to 200nC typical
  • Max. Pulse Rep. Rate:  40kHz
  • Display:  Phase Resolved Partial Discharge Pattern
  • Power:  USB and external 6VDC power supply
  • Interface:  USB PC requirement: Desktop or Notebook, Windows XP, 512 MB (min.)
  • Test Voltage Range:  15kV (DELTAMAXX 15), 20kV (DELTAMAXX 20), 30kV (DELTAMAXX 30), 50kV (DELTAMAXX 50)


  • PDCAL 20 calibrator
  • Laptop
  • Optical USB link

Get a Quote

Call us at +1 905.677.4824 or Toll Free at +1 888-873-4747. Alternatively, please email us at or fill out our online quote form below.

Learning Center

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