Summary
The increasing demand for renewable energy and industrial electricity has significantly increased the construction volume of overhead transmission lines. Consequently, the importance of efficient and safe construction methods for overhead transmission lines has become more prominent. Tensioning work, which involves pulling the conductor to the appropriate sag and attaching it to the insulator string, is a critical process that determines construction quality and costs while carrying significant risks.
Read more Read lessCurrently, tensioning operations do not involve direct tension measurement but rely on surveying based on designed sag values. This approach raises concerns about construction quality, as conductors may be improperly tensioned, deviating from the intended design specifications.
Traditional equipment, such as the engine puller, has structural limitations that require workers to manually hold the wire, increasing the risk of accidents during operation. For example, in 2018, a serious accident occurred during a conductor replacement project when a rope attached to the equipment reversed and wrapped around a worker's ankle, causing a severe injury.
Additionally, the engine puller is a large piece of equipment, measuring 3.2 meters in length and weighing 2.5 tons, which makes transportation difficult. It also requires the preparation of a dedicated worksite, which often involves tree felling, resulting in forest damage and additional costs. The newly developed tensioning equipment addresses these issues by reducing the weight of each module to approximately 30 kg, enabling manual transportation. This compact equipment can be attached to the main post of a transmission tower during construction, eliminating the need for a separate worksite and enabling environmentally friendly construction without forest damage.
Notably, the new equipment incorporates a remote controller, allowing for remote operation and eliminating the need for workers to manually hold the rope. This significantly reduces the risk of accidents.
Furthermore, the equipment is designed to automatically stop the winch's operation once the preset design tension is reached. It also enables real-time tension monitoring and data storage, making construction quality management more efficient.
The new tensioning equipment combines safety, quality, environmental sustainability, and economic efficiency. It overcomes the limitations of traditional engine pullers and is expected to become a groundbreaking alternative in the field of overhead transmission line construction.
Additional informations
| Publication type | Session Materials |
|---|---|
| Reference | B2_11788_2026 |
| Publication year | |
| Publisher | CIGRE |
| Country | Korea, Republic of (South Korea) |
| Study committees | |
| File size | 843 KB |
| Price for non member | 30 € |
| Price for member | 30 € |
Authors
ROH Si-dong; KIM Bu-Kwan; KIM Jong-Chae
