b2 electronic PD Series, User Manual

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General Description
© b2 electronic GmbH DHV0088 15
3.2 Partial Discharge Unit
The b2 electronic GmbH high voltage Test System PDTD-2 offers both portable and built-in solutions for diagnostics of
medium voltage cables, rotating machines and transformers.
Diagnostics of medium and high voltage cables provides the opportunity for early detection of vulnerabilities, allowing preventative
maintenance work to be carried out before the cable fails in service. Partial Discharge diagnostics (PD) allows a precise analysis
of cables and their joints and terminations. Tan Delta diagnostics (TD) allows a clear statement about the overall dielectric
condition of aged polymeric cables and especially any damage by so-called “water trees”.
With PDTD-2 - VLF testing, PD diagnostics and TD diagnostics can be carried out simultaneously!
b2 electronic Diagnostics System PDTD-2 provides a pure sinusoidal output voltage with extremely stable frequencies. This
is a pre-condition of direct comparison of PD and TD diagnostics results across cables of different lengths. The characteristics
at ever-changing frequencies and varying output voltage waveforms provide no basis for reliable comparisons. For the 0.1 Hz
diagnosis with true sinusoidal output voltages, various standards (such as IEEE400.2-2013,..) provide clear guidelines and
procedures.