Megger IDAX300 and IDAX350-INSULATION DIAGNOSTIC ANALYSER

IDAX is an insulation diagnostic instrument based on DFR (Dielectric Frequency Response), also known as FDS (Frequency Domain Spectroscopy). DFR technology is an established test procedure in laboratories that in an innovative effort by Megger has been adapted for field use in the IDAX range of instruments.

In short, DFR is the measurement of capacitance and losses (dissipation factor (tanδ) or power factor) over multiple frequencies. The measured DFR curve is dependent on insulation geometry, moisture, oil conductivity and temperature and through advanced fitting to a reference material model moisture content, predominantly in solid insulation, oil conductivity at 25°C reference temperature and tanδ at 20°C reference temperature can be calculated.

In the calculations ITC (Individual Temperature Correction), another important Megger innovation is used to translate test data from the test object temperature to the reference temperatures. It the latest release, the IDAX SW incorporates a new ITC corrected frequency sweep specifically designed for assessment of instrument transformers and bushings. IDAX is exceedingly easy to use with an automated test flow and presentation of results in an easy to understand “traffic light” manner.

Megger IDAX300 and IDAX350-INSULATION DIAGNOSTIC ANALYSER Specifications:

• Inputs: Channel 1, channel 2, ground
• Capacitance range: 10 pF – 100 μF
• Inaccuracy: 0.5% + 1 pF
• Dissipation factor range:0 – 10 (with retained accuracy of capaci-
  tance; otherwise higher)