Answer: As a prominent China manufacturer and exporter specializing in power line equipment, we understand the complexities of 220kV underground cable projects. The primary challenges are the cables' substantial weight and stiffness, the precision required for laying in trenches, and the critical need for proper jointing and termination to ensure long-term reliability.

The best practices we recommend and support with our equipment include:

• Detailed Planning and Surveying: Comprehensive route planning and sub-surface utility detection are paramount to avoid obstacles and ensure trench integrity.

• Use of Specialized Equipment: Given the cable's weight, it's essential to use professional-grade tension stringing equipment. This includes powerful pulling winches, durable underground-Cable-Laying-Equipment-and-Tools.html target='_blank'>cable rollers, and anti-twist devices to maintain the cable's structural integrity during installation.

• Controlled Pulling Process: The tension and speed of the cable pull must be carefully controlled to prevent mechanical damage to the cable sheath and insulation. Our equipment is designed to provide precise control, minimizing stress on the cable.

• Trefoil Formation and Ventilation: For optimal performance, 220kV cables are often laid in a trefoil formation within naturally ventilated trenches. Ensuring proper spacing and ventilation is key to effective heat dissipation and preventing long-term thermal issues.