LIRA is sensitive to small changes of wire electric parameters, mainly the insulation permittivity, that are a significant condition indicator of the cable state (thermal and radiation aging, humidity, insulation defects, mechanical damage).

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LIRA can detect:

• All types of changes affecting the insulation capacitance

• Dimensional changes as cable joints or splices between different cable types, areas influenced by extensive heating, radiation, water intrusion, corrosion, bends, scratches, mechanical impacts, fatigue, etc.

• Global or local insulation material degradation (XLPE, PILC and others).

• All types of changes affecting the insulation capacitance

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LIRA might detect:

• Damages in outer sheath only if water/
  humidity or other factors directly or indirectly
  affects the capacitance of the insulation/screen
  system

• High resistance failure depending on extent ofchange and size