Tan Delta Cable Testing Using VLF

Model TBD-60

The TDB-60 is used for measuring the loss angle, or dissipation factor, of shielded power cable. These measurments are used to track the detioration of cable insulation. Increasing Tan Delta numbers indicate increasing cable insulation degradation. TD measurments 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 a cables insulation integrity.