Effective Maintenance of Solar Cables: Daily Checks & Annual Upkeep

23/09/2023Knowledge Blog Solar & PV Cable 11320

Effective Maintenance of Solar Cables: Daily Checks & Annual Upkeep

1. Routine Maintenance

Inspection of Cable Arrangement: Ensure cables are orderly arranged, free from mechanical damage, and that signage is complete, accurate, and clear.
Ceramic Sleeve Examination: Regularly inspect the ceramic sleeve of cable terminals for any damage, cracks, dirt, and discharge.
Connection Reliability: Verify the reliability of cable terminal connections and check for any signs of overheating or looseness.
Terminal Condition Monitoring: Regularly monitor cable terminals for any oil leaks, adhesive leaks, breakages, or burn marks.

2. Annual Maintenance

Preventive Testing: Conduct preventive tests as per the stipulated requirements to ensure the longevity and functionality of the cables.
Cable Trench Inspection: Regularly remove dust and inspect cable trenches and wells for debris, water accumulation, and structural integrity.
Defect Resolution: Address and rectify any defects identified during the routine and annual maintenance checks to maintain optimal cable performance.

3. Inspection after the operation

Check item	Check location	Inspection standards	Detection method
Cable phase sequence	cable terminator	Comply with the wiring sequence before the operation	Visual, Manual
Legacy	On-site	All tools and utensils are collected and counted, and the work surface is clean and hygienic	Visual, Manual
Connection part	Cable connector	The connection is tight, the appearance is good, and the wiring is correct.	Visual, Manual

4. Addressing Common Faults
Overheating Due to Loose Cable Ends:
Procedure: Isolate the relevant equipment and implement organizational and technical measures to ensure safety. Discharge the cables before operation.
Solution: Depending on the location of overheating, re-tighten connections, re-wrap the insulation, or remake the cable head.
Flashover Due to Pollution on Cable Termination Porcelain Sleeve:
Procedure: Isolate the faulty equipment and implement safety measures. Clean and descale the affected porcelain sleeve and observe after testing power transmission.
Solution: If cleaning doesn’t resolve cracks on the meter body, replace it with qualified spare parts.
Low Cable Insulation Resistance:
Procedure: Measure the insulation as per regulations and compare with historical data. If the difference is minor, resume operation but intensify inspections.
Solution: If there’s a significant difference compared to historical data, conduct a DC withstand voltage test to confirm the insulation condition.

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