According to our investigation of insulators used in overhead lines, pin insulators, butterfly insulators, suspension insulators, porcelain crossarms, rod insulators, LXY-70 glass insulators and tension insulators are commonly used. We produce complete specifications of insulators. In general, electrical faults of insulators are flashover and breakdown. Flashover occurs on the surface of the insulator, and burn marks are visible. The insulation performance is usually not lost. The breakdown occurs inside the LXY-70 glass insulator, and the ceramic body is discharged through the iron cap and the iron foot. The appearance may not be traced, but it has been lost. Insulation properties may also cause complete destruction of the insulator due to arcing. For breakdown, attention should be paid to checking the discharge marks and burns of the iron feet of the LXY-70 glass insulator. After a flashover occurs, the voltage between the electrodes drops rapidly to zero or close to zero. Sparks or arcs in the flashover channel cause localized overheating of the insulating surface to cause charring and damage to the surface insulation. We caution that safety must be taken into account during use or maintenance.
1) In terms of the microscopic morphology of the crust-breaking mandrel: on the surface of the broken mandrel, it is observed that the glass fiber is broken, the glass fiber and the epoxy resin matrix are separated from each other, the epoxy resin matrix is corroded, and the residue remains. "Stomach" and "bubble" phenomenon appear on the epoxy resin matrix on the surface of the glass fiber; on the section of the broken core fiber surface of the broken mandrel, it can be observed that the single glass fiber section is not a complete circular shape, glass The fiber section is flat and the interface failure between the glass fiber and the epoxy resin matrix can be observed.
With glass insulators, it is possible to eliminate the periodic periodic preventive test of the insulator during operation. This is because every damage to the tempered glass will cause damage to the insulator, which is easy for the operator to find when patrolling. When the insulator is damaged, the glass fragments near the steel cap and the iron foot are stuck, and the mechanical strength of the remaining portion of the insulator is sufficient to prevent the insulator string from breaking off. The self-breaking rate of glass insulators is one of the important indicators to measure product quality, and it is also the quality basis for bid evaluation at the current transmission engineering recruitment and bidding.
Product structure: The product consists of iron cap, tempered glass and steel feet, and is glued together with cement glue. This product is all made of a cylindrical head structure, which is characterized by a small head size. Light weight, high strength and large creepage distance. It can save metal materials and reduce the cost of the line. In order to meet the needs of live working, the traditional structural shape of the domestic is adopted on the brim.