Measures To Prevent High Voltage Bushing Accidents

First, the appearance inspection includes 1) cracks on the insulator, missing skirts, and missing flanges, 2) loose bolts and nuts, 3) creepage traces or discoloration traces, and 4) whether the terminal joints are discolored. You can use a temperature-indicating patch or a far-infrared imager to detect them regularly. 5) Regularly shut down the equipment for cleaning. Second, regular preventive tests can be carried out to effectively detect overall insulation moisture, dirt, and penetration defects, as well as insulation breakdown and severe overheating and aging. Including insulation resistance measurement or power frequency AC withstand voltage test. The insulation resistance is measured using a megohmmeter, usually 2500V and above, and the test result is not less than 100 megohms. Third, if the shed spacing between Switchgear Insulating Bushing is lower than the fixed standard or in order to avoid flashover accidents, the silicone rubber shed sleeve can be added, also known as the creepage group. The climbing skirt refers to a silicone rubber umbrella skirt made of high-temperature vulcanized silicone rubber insulation material, which is made by injection and molding, covering the upper surface of the porcelain or glass umbrella skirt, and bonding it to the upper surface of the original porcelain or glass umbrella skirt through an adhesive to form a combined insulation. By installing the climbing group, it can be combined with the bushing body. The combined insulation of the two can improve the characteristics and structural shape of the porcelain surface, which can effectively improve the anti-pollution flashover ability of the equipment. Fourth, spray the anti-pollution flashover material on the surface of the bushing. Anti-pollution flashover material is also called room temperature vulcanized silicone rubber, which is divided into RTV anti-pollution flashover paint and PRTV anti-pollution flashover paint. Spraying anti-pollution flashover material can improve the insulation level of electrical equipment. PRTV paint has better hydrophobicity and hydrophobic migration than RTV paint, and at the same time has certain oil repellency and good non-stickiness, as well as longer effective life.