Cause Analysis And Solution Of The Accident Of The Wire Clamp In The Trench Of The Tension Tower Drainage Line

Abstract: The transmission line tension pole drainage parallel groove clamp is the weak link of the transmission line electrical connection. In recent years, due to the continuous increase in power load in the oil field, some heavy-load and long-running lines have experienced overheating or broken strands in the tension pole tower drainage line parallel groove connector, aluminium pg clamp burnt into unevenness or holes, and the connecting bolts burned and discolored. This paper takes the 35kV Anpan Line and Jingnan Line tension pole drainage line break accident as an example, analyzes the cause of the failure, and puts forward corresponding preventive measures. [Keywords]: Transmission line drainage line bimetal pg clamp Break prevention measures 1. Introduction At present, in the jurisdiction of 35-110kV transmission lines, the drainage lines of tension pole towers are basically connected with traditional aluminum blackburn parallel groove clamp conductor joints. Although the structure is simple, it is the key part of carrying load current and plays an important role. During operation, due to various reasons, the drainage blackburn parallel groove clamp conductor joints often heat up, and the internal wires of connector parallel groove burn out. Especially on some lines with small wire diameters and heavy loads, the wires in the parallel groove clamps heat up and break more often. Therefore, analyzing the causes of the tension tower drainage line parallel groove clamp accidents and proposing control measures are of great practical significance to ensure safe and reliable power supply of power lines.