State-of-the-art. Cable diagnostics with BAUR’s PHG 70 TD/PD and PHG 80 TD/PD

The testing and diagnostics systems PHG TD/PD with VLF truesinus® technology are the internationally recognised standard for established cable diagnostics. PHG TD/PD is multifunctional and allows a reliable evaluation, e.g., of continuous “water-tree” – aged cable with low dielectrical strength. The systems combine test, dissipation factor measurement tan d, partial discharge level measurement and partial discharge location. Users have detailed information about the condition of the cable network for all cable types, independent of cable length. With the cable database trend analyses can be performed to plan maintenance precisely. The extensive, self-explanatary software allows automatic testing and simultaneous diagnostics as well as programmable test sequences. BAUR’s PHG TD/PD is offered as stand-alone system or is built into cable test vans and are also suitable for difficult connection situations.

Facts

• High-performance VLF diagnostics system
• Comprehensive overview of the quality and aging condition of a medium-voltage cable systems up to 50 kV
• Fast assessment of all cable types (3-phase approx. 1 hour)
• Graphical multilingual software interface
• Integrated industrial PC (MS Windows) with 15.1” TFT display
• Cable database enables current and future analyses
• Fully automatic programmable testing and diagnostics
• Individual definition of interruption criteria in case of exceeding the threshold value
• Voltage range
  PHG 70: 1 - 38 kVrms, truesinus®, +/- 70 kV DC
  PHG 80: 1 - 57 kVrms, truesinus®, +/- 80 kV DC
• tan delta:
  Accuracy: 1% from the measured value
  Measuring range: 0,1 x 10-3 bis 1000 x 10-3
  Load range: > 10 nF (500 pF, optional)
  Monitoring of parasitic currents, numerical and graphical tan d presentation
• PD:
  Location accuracy to 1 % of the cable length
  PD level: up to 20 pC
  Sampling rate: 10 ns (100 Msamples/s)
  Overview presentation of PD activity over the whole cable length
  Resolution: 1 x 10-5

Intelligent technology improves the efficiency of power distribution of BAUR’s diagnostics systems PHG 70/80 TD/PD.

The cost pressure on operations and maintenance of power cable networks is further increasing. Implementing a conditionbased maintenance strategy is enabling power utilities to achieve ambitious cost targets. The investment in a BAUR truesinus® diagnostic system has a very short pay back period.
Replacing 200 meter of cable circuits instead of 2.000 meter makes a big difference.

Only with the extensive information provided by BAUR’s diagnostics system PHG TD/PD power utilites can use their infrastructures optimally. The life time of cable systems can be increased without the risk of expensive network breakdowns.
In addition, servicing and operating costs can be minimised by targeted maintenance.