Terminal Support Structure

The Terminal Support Structure is an important transition structure that connects overhead lines to underground cables or gas‑insulated switchgear (GIS) in a substation. Overhead lines enter through the Terminal Support Structure. The conductors pass through strain insulator strings and jumpers, then connect to cable termination equipment or GIS via cable terminals or enclosed busbars. This structure must withstand the full mechanical load of the line. It also provides mounting platforms for cable termination equipment. Qingdao Hongyuanfeng Power Equipment Co., Ltd. manufactures Terminal Support Structures using Q355B steel pipes or H‑beams. All components receive hot‑dip galvanizing with a zinc coating of at least 86μm. This meets GB/T 2694‑2018 standards. The base of the structure includes cable fixing brackets and an operation/maintenance platform. We also provide climbing ladders and safety rails for easy access to cable terminals.

Our Terminal Support Structures range from 8 meters to 25 meters in height. The specific height depends on the voltage level and cable termination installation height. The maximum horizontal tension design value ranges from 40kN to 120kN. Maximum wind speed capacity is 35 m/s, and earthquake resistance is grade 8. Our production equipment includes a 3200T bending machine and 800T hydraulic press. Monthly production capacity is 1,000‑1,500 tons. Standard delivery takes 15‑20 days.

Qingdao Hongyuanfeng Power Equipment Co., Ltd. started in 2019. Our factory covers 151 mu with 120 employees. We hold 14 patents and have passed three management system certifications. We are a "High‑tech Enterprise". Our certified inspectors control weld quality, galvanizing thickness, and installation dimensions. We perform 100% inspection before packing and accept third‑party inspections. Our Terminal Support Structures have been successfully used in projects including Suzhou Yuexi 500kV and Xishan 500kV substations. In urban areas, they enable smooth transition from overhead lines to underground cables, reducing line congestion around substations.

We produce according to customer technical drawings with a minimum order of 10 tons. Custom sample development takes 7‑10 days for large items. Before the sale, our technical team provides planning and drawing support. During production, we share progress and coordinate shipping. After the sale, we offer a 2‑year warranty and on‑site installation guidance. We also conduct regular follow‑up visits.