Quick Answer
Lightning protection for solar systems, including the surge arrester or lightning arrestor, may need replacement if it has been damaged, is showing signs of wear, or has been in service for longer than 10 years.
Inspection and Maintenance
To assess the condition of your lightning protection, inspect the surge arrester or lightning arrestor and associated wiring for signs of physical damage, corrosion, or wear. Check for any burn marks, water intrusion, or cracks in the housing. If you find any damage, replace the lightning protection immediately. Additionally, consider replacing the surge arrester or lightning arrestor if it has been in service for longer than 10 years, as its effectiveness may degrade over time.
Testing and Verification
Another indicator of potential replacement is the lack of proper performance during lightning strikes. If your system has experienced a lightning strike and the surge arrester or lightning arrestor failed to protect the system, it is time to consider replacement. Furthermore, consider performing regular testing and verification to ensure the lightning protection is functioning as intended. This can be done by using a surge simulator to test the lightning protection’s ability to divert energy safely away from the system.
Industry Standards and Recommendations
For solar combiner boxes, industry standards and recommendations from organizations such as UL (Underwriters Laboratories) and IEEE (Institute of Electrical and Electronics Engineers) may dictate specific requirements for lightning protection. For example, UL 2703 requires surge arresters to be replaced every 10 years or after a lightning strike. Follow these guidelines and best practices to ensure your solar system is properly protected against lightning-induced damage.
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