Diagnosis of cables and malfunction detection in high-voltage overhead lines
Take delivery of new installations, assess the remaining life expectancy of connections and locate defects on cables in high-voltage overhead lines.
Test objectives
- Detect ageing or downgrading of cable insulation by measuring the insulation resistance
- Detect an electric current leakage that may indicate the presence of humidity or downgrading of cable insulation by measuring the tangent delta
- Locate a weak point on the cable by measuring the partial discharge
- Pre-locate a clear defect by measuring the pulse reflection
- Pre-locate an unclear defect by performing a surge arc reflection
- Determine the condition of the external sheath of a cable by conducting sheathing defect tests
Test resources
- FLUKE FL 1555
- MEGGER MT1025
- PA-TaD (Baur)
- PROTRAC (Baur)
- Baur vehicle laboratory
- Hagenuk vehicle laboratory
- VIOLA TD (Baur)
Test norms
IEEE 400.2 – Guide for Field Testing of Shielded Power Cable Systems Using Very Low Frequency
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