VLF Cable Diagnostics

Conducting diagnostics of medium- and high voltage cables enables early detection of vulnerabilities and preventive maintenance work to guarantee the long-term performance of the distribution system. 

PD diagnostics (partial discharge diagnostics) is a simple and highly effective nondestructive method detecting and locating electrical trees or other PD faults in cables and their connections (joints and terminations), which are often caused by mechanical damage as a consequence of incorrect installation. By finding the exact PD location, detected damages can be fixed before they result in a cable failure. This leads to a massive improvement in the network stability.

TD diagnostics (tangens delta diagnostics) is a proven, simple, and reliable test method evaluating the overall dielectric condition of cables and other electrical assets and reveals presence of damages caused by water trees. Especially in demand is TD diagnostics for aged polymeric cables (e.g. XLPE), since with age and due to mechanical influences, insulation deteriorates and is no longer able to provide the expected dielectric strength.

In order to fit the needs of all of our clients, b2 electronics offers the widest range of PD and TD diagnostics systems on the market, with test voltages from 34 kV to 200 kV (sine wave).
With the corresponding b2 Suite software, you get manual and incremental test modes with self-explanatory menus, as well as a fully automatic measurement mode reducing operational efforts.
Diagnostics systems from b2 electronics are following guides like IEEE 400.2 and 400.3 and are in compliance with standards HD 620, CEI EN 50393, IEC 60270, IEC 60502-2 and their local derivations.

For more than 20 years we have been developing and manufacturing VLF high voltage systems for cable testing and diagnostics, serving power utilities and their supporting industries worldwide.