Cable diagnostics in MV underground cable networks according to IEEE 400.2 and IEC 60502:

• VLF testing on cable insulation.
• tan delta loss factor measurements.
• Partial discharge Inception voltage (PDIV), Extinction voltage (PDEV) and PD level-quantity measurements.
• Partial discharge source localization (PD mapping).
• Partial discharge Phase Resolving Pattern analysis (PRPD)

Cable fault location in LV, MV and HV underground cable networks. Location of insulation and protective sheath (jacket) faults:

• Cable Insulation and protective sheath testing and fault analysis.
• Application of  Fault Prelocation methods: Impulse Reflection Method (TDR), Secondary/Multiple Impulse Method (SIM/MIM),Impulse Current Method (ICM), Decay method, Murray Bridge Method, Glaser Bridge Method.
• Application of  Fault Pin-Pointing methods: Acoustic Fault Location, Step Voltage Method, Twist Method.

Additional tests and measurements:

• Cable / Phase Identification
• Cable Route Tracing
• Cable continuity test
• Cable Positive and Zero Sequence Impedance measurements
• Groung terrain examination prior to excavation works, to detect the presense of  burried cables and metallic networks.