Feichun TECSUN S3Z2Z2-K: High-Performance PV Cables for Inverter-Transformer Interconnection
Introduction: Reliable Power Transfer in Large-Scale PV Systems
In large-scale photovoltaic (PV) systems, the reliable and efficient transfer of power is critical for ensuring optimal performance. One of the most essential connections is between the central inverter and the transformer. This link needs a high-quality cable that can handle demanding conditions while ensuring safety and longevity.
Feichun, a leader in developing specialized cables for the renewable energy sector, offers the TECSUN S3Z2Z2-K cable series. This product is designed specifically for interconnections between central inverters and transformer stations, ideal for high DC and AC voltages.
With features like improved fire performance, increased heat resistance, and halogen-free construction, this cable is built to last and meet diverse environmental conditions.
In this article, we will delve into the technical specifications, industry standards, and installation considerations of the TECSUN S3Z2Z2-K cable, focusing on its use in inverter-transformer interconnection.
We will also highlight the advantages it offers in terms of material quality and manufacturing processes, while helping you understand its role in modern solar PV installations.
Cable Construction and Technical Specifications: Engineered for Demanding PV Applications
The TECSUN S3Z2Z2-K cable is meticulously engineered for solar PV systems where performance, safety, and durability are paramount. Below is a detailed breakdown of its key components and electrical characteristics.
Key Components
| Component | Specification | Benefits |
| Conductor | Electrolytic tinned copper, finely stranded Class 5 (IEC 60228) | High flexibility for installation and long-term reliability |
| Insulation | HEPR (Heat Resistant Ethylene Propylene Rubber) | Excellent thermal and electrical properties; UV resistant |
| Outer Sheath | EVA (Ethylene Vinyl Acetate) rubber | Flame retardant, low smoke, weather resistant, oil & chemical resistant |
Electrical Characteristics
| Parameter | Value | Explanation |
| Nominal Voltage DC (U) | 4500 V | Ideal for high-voltage DC applications |
| Maximum Voltage DC (Um) | 5400 V | Ensures robustness under high-voltage conditions |
| Nominal Voltage AC (U) | 3000 V AC | Suitable for high-voltage AC power transmission |
| Nominal Voltage U0 | 1800 V AC | Safe working voltage for continuous operation |
| Test Voltage | 6.3 kV | Adequate for ensuring insulation integrity during operation |
Thermal Performance
| Parameter | Value | Explanation |
| Max Conductor Temp | 90°C | Suitable for high temperatures, allowing increased current carrying capacity |
| Max Temp (Short Circuit) | 250°C | Provides enhanced safety during fault conditions |
| Ambient Temp (Fixed Installation) | -40°C to +60°C | Suitable for diverse environmental conditions |
Mechanical Properties
| Property | Value | Explanation |
| Tensile Strength (Permanent) | 15 N/mm² | Ensures long-term durability during operation |
| Tensile Strength (Installation) | 50 N/mm² | High tensile strength ensures safety during installation |
| Bending Radius | 3 x D (fixed), 4 x D (flexible) | Ensures safe bending during installation and use |
Compliance with Industry Standards: Ensuring Quality and Safety in PV Applications
Feichun's TECSUN S3Z2Z2-K cables are designed and manufactured to comply with a wide range of global industry standards. These standards ensure safety, quality, and long-term reliability in demanding environments.
| Standard | Specification | Relevance |
| DIN EN 61034-2 | Smoke density measurement under fire conditions | Ensures low smoke emission for safety in case of fire |
| DIN EN 60332-1-2 | Flame propagation test for insulated cables | Prevents vertical flame spread in critical PV system installations |
| IEC 60228 | Conductors of insulated cables | Ensures proper conductor material and insulation performance |
| DIN EN 50618 | Electrical cables for photovoltaic systems | Specific requirements for PV cables, ensuring weather and UV resistance |
| DIN VDE 0100-520 | Erection of low-voltage electrical installations | Ensures compliance with electrical installation standards |
| DIN VDE 0660-500 | Low-voltage switchgear assemblies | Defines standards for safe switchgear and controlgear assembly |
These standards are essential for ensuring the cables are suitable for high-voltage DC and AC applications, capable of withstanding extreme temperatures, and providing fire safety.
Practical Considerations and Potential Challenges: Addressing Real-World PV Installations
While the TECSUN S3Z2Z2-K cable is highly durable and reliable, proper installation and operational practices are crucial for ensuring optimal performance in real-world PV installations.
Installation Guidelines
| Consideration | Best Practices |
| Cable Handling & Storage | Avoid mechanical stress and damage during transportation. Store cables properly. |
| Bending Radius Limitations | Adhere to minimum bending radius to prevent damage to the cable insulation. |
| Cable Routing & Fixing | Use cable clamps and conduits to avoid excessive stress, vibration, and abrasion. |
| Terminations & Connectors | Ensure secure and reliable connections to minimize heat build-up and voltage drops. |
| Direct Burial Installation | Follow guidelines for soil conditions, burial depth, and protection from rodents. |
Environmental Considerations
| Factor | Implications |
| Temperature Extremes | The cable is rated for use in environments from -40°C to +60°C. Ensure temperature conditions are considered during installation. |
| UV Radiation | The outer sheath is UV-resistant, ensuring long-term durability under sunlight exposure. |
| Chemical Exposure | The cable is resistant to chemicals and oils, ideal for industrial and agricultural applications. |
Conclusion: Feichun TECSUN S3Z2Z2-K: Reliable Interconnection for High-Performance PV Systems
The TECSUN S3Z2Z2-K cable series by Feichun provides a highly reliable solution for interconnection between central inverters and transformer stations in large-scale photovoltaic power systems.
Its superior fire performance, heat resistance, and halogen-free construction make it suitable for a wide range of installation environments, including hazardous areas, direct burial, and indoor/outdoor applications.
Designed to meet industry standards like DIN EN 50618, IEC 60228, and DIN VDE 0100, the TECSUN S3Z2Z2-K cable ensures safety and reliability for solar energy applications.
Its ability to handle high voltages, resist extreme temperatures, and provide long-term durability makes it an essential component for the interconnection of inverters and transformers in large-scale PV systems.
For more information, technical support, or product inquiries, Feichun is here to provide expert guidance and ensure your PV systems are equipped with the best cables for optimal performance and longevity.
Appendix: Technical Datasheets & Guidelines
| Parameter | Value | Details |
| Current Carrying Capacity | 75 A | According to EN 50618, for a single cable in open air |
| Installation Guidelines | Direct Burial Allowed | Follow PRYSMIAN testing guidelines for direct burial |
| Electrical Testing Procedures | Required Testing | Include insulation resistance and voltage withstand |
Glossary of Technical Terms
- Conductor: The material that carries the electrical current, typically copper in high-performance cables.
- Insulation: The material that surrounds the conductor to prevent electrical short circuits.
- Sheath: The outer layer that protects the cable from external factors like UV, chemicals, and mechanical damage.
