Looking ground for overhead transmission lines shorter when looking ground, can be arranged along the staff to conduct a comprehensive inspection, but for a long time looking for the overhead transmission line ground, were the preferred method should be adopted. First in line at half the length of Tension rod segments, respectively, the three-phase line open drainage line lightning protection and grounding cable quotes, the entire line is divided into two sections, and then measure the three-phase 2500V megger wire insulation resistance, the measurement result may ascertain certain grounding or two lines are grounded. Secondly, based on the result segments continue to find, and gradually narrow down your search. Ground to be narrowed down to a certain extent, lightning protection and grounding wire, can be arranged along the staff to conduct a comprehensive inspection. This can save time, reduce the amount of labor, thereby improving efficiency. Insulator failure (1) porcelain insulators on the line due to the impact of harmful components in the air, so that part of the dirty porcelain encounter wet weather, filthy layer absorbs moisture wholesale lightning protection and grounding wire, conductive performance enhancements, both to increase the power consumption, but also likely to cause flashover accident. (2) lines installed by mistake or due to failure of the porcelain insulator insulator aging lightning protection and grounding line selection, under the action of the power frequency voltage flashover breakdown. When this inspection found traces of porcelain insulator flashover should be promptly replaced, and new porcelain insulators pressure test must be replaced. (3) ceramic insulated in part by external damage, cracking or damaged, or destroyed chunks of porcelain from the edge of the skirt to the top of both crack and should be replaced, otherwise it will cause the insulation to reduce the occurrence of flashover accident. [1] lightning protection and grounding wire lightning protection and grounding wire wholesale _ _ Anhui Electric Group Co., Ltd. provided by Anhui Electric Group. Anhui Electric Group Co., Ltd. (www.ahecable.com) strong, credible, in Chuzhou bare wires and bare conductor products industry has accumulated a large number of loyal customers. The company better work attitude and constantly improving innovative ideas will lead Anhui Electric Group and you hand into the brilliant, for a better future!