How To Avoid Overheating Of Bolt-type Tension Clamps

In the power system, overheating points of high-voltage transmission lines usually occur at the connection points of the current-carrying conductors, while discharge or overheating of bolted type strain clamp is extremely rare. my country stipulates that 220kV and above transmission lines should be installed with dead end strain clamp along the entire line to reduce the probability of direct lightning strikes on the conductors. The open ground wire of the 220kV transmission line usually uses galvanized steel stranded wire with a cross-sectional area of ​​not less than 35mm2 and is placed above the high-voltage transmission line. The open ground wire is connected to the ground of each tower, and some transmission lines bolted dead end clamp extend to the incoming line structure of the substation. The overhead ground wire is installed in parallel with the 220kV transmission line, and there is induced electricity on the overhead ground wire. Although the inductive electricity of the overhead ground wire is relatively high, the current is very small and will not cause overheating.