ਕੰਮਨ ਫਾਲਟ ਅਨਾਲਿਸਿਸ ਅਤੇ ਫਾਲਟ ਕਰੰਟ ਲਿਮਿਟਰਜ਼ (FCL) ਲਈ ਸਿਸਟੈਮੈਟਿਕ ਮੈਨਟੈਨੈਂਸ ਸੋਲੁਸ਼ਨਾਂ

​Perspective 3: Solutions for Insulation Aging Faults​
​Problem Analysis:​ Insulation materials gradually degrade under long-term exposure to electric fields, thermal stress, and environmental factors (e.g., humidity, dust, chemical contamination). This leads to reduced insulation strength, increased leakage currents, partial discharges, or even breakdown short circuits.

​Solutions:​​

1. ​Preventive Testing and Periodic Replacement:​ Strictly implement preventive testing plans. Regularly measure insulation resistance and dielectric loss factors using tools such as megohmmeters and dissipation factor testers to assess insulation health. Develop periodic replacement schedules for insulation components based on manufacturer recommendations and operating environments.
2. ​Enhanced Environmental Adaptability Design:​ For current limiters operating in humid or heavily polluted environments, select models with moisture-proof, anti-condensation, and anti-pollution flashover features. Use sealed structures, insulating gas injection, or special insulation materials (e.g., silicone rubber) to improve protection levels.
3. ​Condition-Based Maintenance and Cleaning:​ Incorporate insulation inspections into routine maintenance procedures. Use infrared thermal imaging to detect localized hot spots. Perform regular power-off cleaning to remove contaminants from insulation surfaces, keeping them clean and dry.

​Perspective 4: Solutions for Mechanical Faults​
​Problem Analysis:​ Mechanical faults primarily occur in current limiters equipped with mechanical components such as fast vacuum switches or repulsion mechanisms. Common issues include mechanism jamming, spring fatigue, contact wear, and poor contact, which can prevent the current limiter from operating reliably within milliseconds.

​Solutions:​​

1. ​Systematic Mechanical Maintenance:​ Establish a regular mechanical maintenance regimen. This includes cleaning operating mechanisms, replenishing or replacing lubricants, checking for loose fasteners, measuring contact wear and overtravel, and ensuring mechanical flexibility and reliability.
2. ​Selection of High-Reliability Products:​ During procurement, prioritize brands and products with mature designs, extensive practical validation, and long mechanical lifespans.
3. ​Improved Operating Environment:​ Avoid installing equipment in extreme environments with strong vibrations, significant temperature fluctuations, or corrosive gases. If unavoidable, implement auxiliary measures such as vibration damping, temperature control, and sealing.

​3. Comprehensive Implementation Recommendations​

1. ​Establish a Full Lifecycle Management System:​ Implement full lifecycle management for fault current limiters, from device selection, installation, and commissioning to operation, maintenance, and decommissioning. Maintain detailed health records.
2. ​Train Professional Maintenance Teams:​ Provide specialized training for maintenance personnel to ensure they master the inspection, maintenance, and fault-handling skills outlined in this document.
3. ​Spare Parts Management:​ Stock critical components and wear-prone parts to enable timely replacements during failures and minimize downtime.

​4. Conclusion​
The stable operation of fault current limiters is crucial for grid security. By implementing the comprehensive solutions addressing overcurrent, overheating, insulation aging, and mechanical faults outlined above, and establishing a management system focused on "prevention first, maintenance second," the operational reliability and service life of fault current limiters can be significantly enhanced. This will minimize the risk of unexpected downtime and provide a solid foundation for the safe, stable, and efficient operation of the power system.