Air ground line downward link and method for ground line assembly

Abstract

The invention relates to a power transmission line and discloses a method for aerial earth wire lead-down connection and earth wire assembly. The method comprises the following steps that: material for aerial earth wire lead-down connection is selected; The assembling method of aerial earth wire lead-down connection is that: steel stranded wires along a concrete pole body are bundled and fixed on the concrete pole body by steel wires; the steel stranded wires runs upwards through a guide anchor ear and a steel crossarm, then run upwards through a diagonal draw bar, a ground anchor ear, a pole top and a U-shaped bolt; a parallel groove clamp is used to fasten lead-down wires on the aerial earth wires; two earth wires with the prescribed length are welded into one; two ends of round steel are intensively welded with galvanized earth wire tips; a earth wire groove is dug to be of a U shape; firstly, the earth wires are buried near a pole tower tightly, then extend along the U-shaped earth wire groove and are buried to form a U-shaped earth wire; a resistance value of the earth wires is detected; if the same stable value which meets the design stipulation is obtained, the earth wires can be put into use. The method for aerial earth wire lead-down connection and earth wire assembly has convenient operation, reliable connection and low cost of construction and detection.

Description

technical field [0001] The invention relates to power transmission and transformation lines, in particular to a method for overhead ground wire down-conductor connection and ground wire assembly. Background technique [0002] For transmission lines, all cement poles with overhead ground wires, cement poles and cement cross-arms have gap defects. There is a gap on the left and right of the double straight rods, and there are two gaps on the left and right of the tension rods, causing the overhead ground wire to lose its proper protection. In the middle, the overhead ground wire is blocked due to the discharge of lightning current, and the lightning is quickly connected to the live wire, resulting in arc light grounding and arc short circuit. , it will cause major accidents such as falling poles and falling towers. In particular, the short-circuit voltage and current will seriously impact the main transformers of substations and power plants, causing explosions and burning o...

AI Technical Summary

Problems solved by technology

All kinds of electrical equipment in the substation explode and burn out at the same time, and the loss will be huge

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