Profile: High Voltage, Inc. specializes in high voltage test equipment for utility and industrial applications. We are an ISO 9001:2008 certified company. We design and produce the most technically advanced & easy to use products for high voltage proof and preventive maintenance testing of electrical apparatus & power cables. We offer AC hipots, AC dielectric test sets, DC hipots, oil dielectric testers, aerial lift & bucket truck testers, cable fault locators, surge generators, TDR, VLF hipots, tan delta, and HV Divider. Our new generation of test equipment offers superior specifications and many benefits over the competition. Our products are generally smaller, lighter, and incorporate significant design, specification & operational advantages over all others. We produce powerful and full featured fault locators, including the top network system thumpers available. All the features needed for efficient fault finding can be found in our thumpers. The TDB-60 is used for measuring the loss angle, or dissipation factor, of shielded power cables. 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 a cable's insulation integrity.