HIGHER WORKING CAPACITY OF RURAL 6-10 kV HV LINES WHEN EXPOSED TO ADVERSE CLIMATIC FACTORS
The article presents the results of the laboratory research undertaken on the strength of fastening wires to pin insulator by means of wire bindings under the longitudinal efforts arising in the process of operation. The work demonstrates the results of inspecting the state of the wire binding on the existing overhead lines of 6- 10 kV, 150 km in length, located in III, IV and special areas based on ice, with a lifetime of up to 10 years or more. Analysis of the results of the test and examination has shown that the fastening wires to a pin insulator with a wire binding may be limited by area III based on the wind and ice. To increase performance of overhead lines of 6-10 kV a new, more reliable design of fastening wires has been developed. It protects the wire from falling in case of a wire break at the fastening point. The developed method of wire fastening has been introduced into eight enterprises of power systems and oil and gas extraction directorates of Russia.