LIRA®

The patent pending LIRA® technology is a non-destructive test method, and will not damage any part of the cable or any equipment connected to the cable.  The LIRA® (LIne Resonance Analysis) technology is based on the transmission line theory, through the estimation and analysis of the complex line impedance as a function of the applied signal frequency. 
 
LIRA® is a system for real-time diagnosis and condition based monitoring of installed electric cables. LIRA® can measure cable length ranging from less than 50 meters to several hundred kilometres, depending by the cable design and electric attenuation.
 
LIRA® can monitor the global, progressive degradation of the cable insulation due to harsh environment conditions (high temperature, humidity, radiation) and detect local degradation of the insulation material due to mechanical impacts or local abnormal environmental conditions. The LIRA® technology is especially sensitive to small changes in the insulation material, which allows an early indication of challenged areas, detecting and localizing single and multiple faults and their severity.
 
LIRA® measurements are recorded and stored and can later be played back and analysed off-site. The LIRA® system consists of "off the shelf" hardware plus connection devices and proprietary software performing the failure analysis, degradation analysis and cable simulation. Extensive cable tests have shown that LIRA can detect the location of the challenged part with an estimation error better than 0.3% of the cable length.