New type of wiring unit for photovoltaic power plants

Modern PV wiring units now combine high-performance cables, advanced connectors, and robust management systems to ensure safety, efficiency, and long-term reliability in solar power plants.

Advanced Cable Types

New wiring units for PV plants often use specialized photovoltaic cables designed for extreme environmental conditions. These include:

• PV1-F cables: Flexible copper conductors with double insulation, UV resistance, and wide operating temperature ranges (-40°C to 120°C), suitable for string-to-inverter connections .
• Armored XLPE cables (YJV22): Used for main transmission lines, capable of handling dynamic torsion in wind and solar projects, rated for 1.8/3 kV, and passing rigorous torsion tests .
• RVV flexible copper cables: Employed for power supply and control systems, offering flexibility and durability under mechanical stress . These cables are engineered to resist UV radiation, temperature extremes, moisture, salt spray, and hydrolysis, ensuring long-term performance in both onshore and offshore installations .

Enhanced Cable Management

Modern wiring units integrate improved cable management systems to prevent failures and maintain efficiency:

• Support and securing: High-grade polymer or metallic cable ties replace standard plastic ties, which often degrade prematurely under UV and environmental stress .
• Routing and organization: Proper grouping, labeling, and color-coding of DC and AC circuits facilitate maintenance and reduce the risk of electrical faults .
• Protection: Cables are shielded from sharp edges, moving parts, and direct sunlight, minimizing insulation damage and fire hazards .

Compliance and Certification

New wiring units are designed to meet international standards:

• IEC 62930 and EN50575 for photovoltaic cables
• CE certification including Low Voltage Directive (LVD), Electromagnetic Compatibility (EMC), and Restriction of Hazardous Substances (RoHS)
• Fire safety compliance and rigorous factory acceptance testing ensure reliability and regulatory adherence .

Benefits of New Wiring Units

• Long-term reliability: Designed for 25+ year lifespans with minimal maintenance .
• Operational safety: Reduced risk of arc faults, ground faults, and fire hazards.
• Adaptability: Suitable for diverse climates and complex installation environments, from residential rooftops to large utility-scale solar farms .
• Supply chain efficiency: Optimized logistics and factory testing ensure timely deployment in large-scale projects . In summary, new wiring units for PV power plants combine high-performance cables, advanced connectors, and robust management systems to enhance safety, efficiency, and durability, while meeting stringent international standards and adapting to challenging environmental conditions.