Construction of 20 kV Overhead Line and Substations for the Replacement of Feeder 253/1

The project involved the construction of a new 20 kV overhead line and installation of BOX-type substations to replace Fider 253/1, financed by the Distribution System Operator (OSSH). Located in Zall Herr, Tirana, and implemented over a period of six months, the project aimed to strengthen the electrical distribution infrastructure, improve service reliability, and ensure compliance with technical and safety standards.

The works began with terrain preparation and excavation for the foundations of the poles, ensuring structural stability. Centrifugally reinforced concrete poles were installed to provide durability and long-term performance for the overhead line. AL-Ç conductors were stretched to enable efficient and stable transmission of electrical energy across the network. Additionally, essential protective components such as insulators and 20 kV three-pole disconnectors were installed to guarantee safe and secure operation.

The BOX-type substations were manufactured according to technical specifications, carefully transported to the site, and installed on pre-prepared foundations. They were properly leveled and anchored to ensure structural stability. Inside each substation, line cells, transformer cells, and low-voltage distribution panels were assembled, ensuring proper mechanical and electrical connections for seamless network integration.

After installation, thorough quality testing was conducted to verify system compliance and performance, followed by commissioning and monitored operation to confirm stable and efficient functionality.

The successful completion of this project significantly enhances the electrical distribution infrastructure managed by OSSH Tirana, providing consumers with improved reliability and quality of electricity supply. The investment is expected to reduce technical losses, increase operational efficiency, and contribute to a more sustainable and modern energy distribution network in the region.

• Excavation and Site Preparation: Technical excavation and groundwork were performed for the placement of pole foundations, ensuring structural stability and resilience.
• Pole Installation: Reinforced concrete centrifuged poles were installed, chosen for their durability and ability to provide long-term stability for the overhead lines.
• Conductor Deployment: AL-Ç conductors were strung across the line, enabling efficient and secure transmission of electricity between key points in the distribution network.
• Accessory Installation: Insulators, 20 kV three-pole disconnectors, and other protective devices were installed to guarantee safe and reliable line operation.

• Production and Transport: The prefabricated "BOX" substations were manufactured in accordance with technical specifications and carefully transported to the site to avoid any damage during handling.
• On-Site Installation: Substations were placed on prepared concrete foundations, ensuring proper leveling, anchoring, and long-term stability of the structures.
• Internal Equipment Assembly: Line switchgear, transformer cells, and low-voltage distribution panels were mounted within the substations, providing the necessary electrical and mechanical connections for safe operations.

• Quality Control: Comprehensive tests were conducted to verify the integrity of the installation, ensuring that all components functioned according to project requirements and safety regulations.
• System Commissioning: Following the successful completion of testing, the system was energized and monitored for a designated period to confirm reliable and efficient performance under operational conditions.

The successful completion of this project has significantly enhanced the capacity and resilience of the local electricity distribution network, fully complying with national technical standards and safety regulations. Consumers in the affected area now benefit from a more reliable and continuous energy supply, with reduced technical losses and improved operational efficiency.

This investment demonstrates a strong commitment to advancing Albania's energy infrastructure, contributing to the long-term goals of sustainable development, modernization of the distribution grid, and improved customer service quality.

The project successfully modernized the local electrical network, improving the stability and quality of electricity supply, reducing technical losses, and increasing operational efficiency. This enhancement supports sustainable development of energy infrastructure and ensures reliable service for residential, commercial, and industrial users.