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High Voltage TDB-60: VLF Tan Delta Cable Tester


The High Voltage TDB-60 Tan Delta can be used to help determine the insulation quality of cables and other capacitive loads. It is used in conjunction with a Very Low Frequency (VLF) AC Power Supply to measure the loss angle or Tan Delta of the insulation. These measurements can be used to track the deterioration of service aged cable and establish baseline readings on new cable installations. Changes in Tan Delta measurements can indicate degradation of the insulation, which can be used to make engineering decisions about the service life of the cables.

SKU: hvi-tdb-60 Categories: , , ,

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The High Voltage TDB-60 VLF Tan Delta Cable Tester is used for measuring the loss angle, or dissipation factor, of shielded power cable

These measurements are used to track the deterioration of cable insulation. Increasing Tan Delta numbers indicate increasing cable insulation degradation. TD measurements are used to establish baseline readings on new installations, for trending cable condition over time, and to help prioritize cable replacement and/ or cable injection programs.

Tan Delta testing is performed with the cable off-line. A VLF AC test instrument is used to provide the test voltage to the cable while the TD device records the results. It is an easy test to perform and provides valuable information about cable insulation integrity.


  • Voltage range: 0 – 60 kV peak
  • Frequency range: 0.01 Hz – 0.2 Hz
  • Full report generating software
  • Displayed data: loss angle, voltage, current, & frequency
  • Accuracy +/- 2% + 0.005
  • Resolution: 0.0005


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Additional information


UOM - Unit of Measure


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