VLF Cable Diagnostics

Conducting diagnostics of medium- and high voltage cables enables early detection of vulnerabilities and prevents potential breakdowns. 

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. 

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.

In order to fit the needs of all of our clients, b2 electronics offers the widest range of TD and PD diagnostics systems on the market, with test voltages from 24 kV to 200 kV (sine wave).
b2 electronics offers for both types of diagnostics (as well as their combination) a tailor-made b2 Suite software solution.
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 close to 20 years we have developed and manufactured VLF high voltage systems for cable testing and diagnostics, serving power utilities and their supporting industries worldwide.

TD Systems

TD30

Operating voltage (sine wave)
34 kVpeak, 24 kVrms
Tan Delta (resolution/accuracy)
1 x 10-5 / ± 1 x 10-4

TD60-MC

Operating voltage (sine wave)
62 kVpeak, 44 kVrms
Tan Delta (resolution/accuracy)
1 x 10-5 / ± 1 x 10-4

TD90-MC

Operating voltage (sine wave)
90 kVpeak, 64 kVrms
Tan Delta (resolution/accuracy)
1 x 10-5 / ± 1 x 10-4

TD120-MC

Operating voltage (sine wave)
120 kVpeak, 85 kVrms
Tan Delta (resolution/accuracy)
1 x 10-5 / ± 1 x 10-4

PD & PDTD Systems

PD30-E

Operating voltage (sine wave)
34 kVpeak, 24 kVrms
PD localization (resolution/accuracy)
0.1 m / 1 %

PD60-2 & PDTD60-2

Operating voltage (sine wave)
62 kVpeak, 44 kVrms
PD localization (resolution/accuracy)
0.1 m / 1 %

PD90-2 & PDTD90-2

Operating voltage (sine wave)
90 kVpeak, 64 kVrms
PD localization (resolution/accuracy)
0.1 m / 1 %

PD120-2 & PDTD120-2

Operating voltage (sine wave)
120 kVpeak, 85 kVrms
PD localization (resolution/accuracy)
0.1 m / 1 %

PDTD200-2

Operating voltage (sine wave)
200 kVpeak, 141 kVrms
PD localization (resolution/accuracy)
0.1 m / 1 %