Megger Idax322 Insulation Diagnostic Analyser

DFR stands for Dielectric Frequency Response. The test is also known as FDS (Frequency Domain Spectroscopy). DFR is a measurement technique in which capacitance and loss (expressed as dissipation factor/tan delta or power factor) are measured over a variety of frequencies to assess insulation status in test objects. experiments, such as power transformers, bushings, and instrument transformers.

DFR technology is an established laboratory testing process that, through Megger’s innovative efforts, has been adapted for field use through the IDAX family of devices. In transformers, bushings, and instrument transformers, faults are often invisible under conditions where diagnostic tests are easy to perform (usually at room temperature and line frequency).

In contrast, problems are often better exposed to temperatures higher or closer to the operating limits of objects. Unfortunately, the temperature is not easily or effectively controlled in the field test environment. The strength of the DFR test as tan delta or power factor is the basis of the measurements. Tan delta or power factor is mainly a function of insulation system geometry, aging byproducts, humidity, insulation fluid conductivity, frequency, and temperature.

By leveraging the knowledge of these relationships, the assessment of aging by-products, moisture, and conductivity can be performed in the frequency domain, via DFR, rather than in the frequency domain. in the temperature, the domain is much more difficult to control. Therefore, DFR makes it easier to find insulation problems under conditions that can be easily achieved in the field.

Related product:

Megger Trax, megger meter

To get more information please contact us.

Megger IDAX 322 Features

• State-of-the-art high voltage Dielectric Frequency Response (DFR) instrument tailored for field testing of power transformers, bushings, and many other test objects.
•  Instruments and accessories designed for the most demanding field conditions
•  2 kV peak and 50 mA capacity – ideal for low capacitance objects such as bushings and instrument transformers
•  Best hardware and specifications for the most accurate results
•  Dual ammeters for two simultaneous measurements
•  Easy-to-use software with assessment guidance by standards and 25+ years of field experience with DFR technology

Megger IDAX-322-INSULATION DIAGNOSTIC ANALYSER specifications:

• General

• Mains voltage: 100 – 240V ±10%, 50 / 60 Hz
• Power consumption 180 VA (max)
• Dimensions:
  420 x 480 x 220 mm (16,5″ x 18,9″ x 8,66″)
• Weight:
  IDAX 322 unit 13 kg (28 lbs)
  Lead backpack 10 kg (22 lbs)

• Measurement section

• Inputs: Red, blue, ground
• Capacitance range: 10 pF – 100 μF
• Accuracy: 0.5% + 1 pF
• Tan delta range: 0 – 100 (with retained accuracy of

• Calibration
  Field calibration is Possible with IDAX Calibration Box CAL300 (AG-90010)
• Time domain current measurement (PDC)

• Range ±50 mA
• Resolution: 0.1 pA
• Accuracy: 0.5% ±1 pA
• Input resistance (DC mode): ≤10 kΩ  

To download the Megger Idax 300 manual user guide please visit  www.megger.com