Cable Condition Assessment Services
General approach
The objective is to identify degradations in the cables before serious failures increase the risk for outages. The condition assessment performed with LIRA® technology, together with other inspection tools, will provide the grid operator more comprehensive data of cables under harsh environmental and operational conditions. This will enable the grid operator to consider cable condition monitoring data as a part for optimisation of operation, asset services and optimal utilisation of standby service capacity.
The recorded measurements can be stored as reference information (fingerprints) for later comparison with repeated measurements. The aging process or identification of new damage to the cable can thus be assessed and recorded. In case of any mechanical impact on cables during installation and operation or aging of the total grid, LIRA® measurements will be performed to evaluate any damage or deteriorating effect on the single asset.
Recorded measurement data and reports are stored in the Data Base. Statistics from the Data Base are used to decide the repetition frequency for cable condition assessment measurements.This is of significant benefit in terms of quality of supply and ensures maximum reliability.
Your benefits at a glance
- Actionable input for asset management plans and maintenance strategy developments.
- Enables high availability at reduced total cost of ownership.
- Improved knowledge base enables reduced emergency repairs.
- Valuable input for network operation based on cable condition information.
- Additionally, consequence and necessary corrective action caused by accidental mechanical impact can be assessed more accurately by performing LIRA® measurements to assess if the dielectric properties are changed.
The benefits apply to
- Transmission & Distribution grids
- On- and Offshore windmill parks
- Process Industry
- Oil- and Gas Industry – Topside and submarine cables (incl. umbilical)
- (Nuclear) Power Plants – I&C and power cables
- Cable Manufacturers – Reference measurements – Quality control
Features
- Best-in-class cable diagnostic system.
- LIRA® is less influenced by noise and therefore more sensitive and accurate.
- Non-intrusive and non-destructive.
- LIRA® performs a power spectrum analysis of impedance phase and amplitude – an advanced detection method of abnormal conditions.
- Sensitive to small degradation and defects.
- Measurement of energized cables from 2011*.
- Only one access point needed for measuring.
- LIRA® provides possibility to zoom in on the blind zone at the near end termination. This feature enables detailed, high resolution measurements in the cable end close to the connection point.
* engineered to specific cases.