What is involved in the maintenance of underground power lines?

2025-08-16

While underground systems are more reliable, they are not maintenance-free. Professional maintenance is crucial to ensure long-term performance and prevent costly failures.

  • Preventive Maintenance: This includes routine inspections of above-ground equipment like pad-mounted transformers and switchgear for signs of wear or corrosion. Infrared thermal imaging is used to detect "hot spots" at terminations and splices that may indicate a developing problem.

  • Predictive Maintenance: Advanced techniques like partial discharge testing can be performed on the cable system to detect early signs of insulation degradation before a failure occurs.

  • Corrective Maintenance: If a fault does occur, our clients use specialized cable fault locators to pinpoint the exact location. The faulty section is then excavated and repaired or replaced, a process that requires a well-stocked inventory of our cable accessories and tools.

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