AC transmission lines with a composite insulator Overview: 10--1000kV rated mechanical load voltage DC transmission line 70-550kN Composite Insulator voltage ± 500-- ± 800kV rated mechanical load 160-550kN composite suspension insulator [FXBW5 -66 / 70, FXBW4-220 / 160] characteristics of small size, light weight, is about the same voltage porcelain insulators 1/5 ~ 1/9, easy to transport and install. Composite insulator high mechanical strength, reliable structure, stable performance, safe operation of a large margin for the safe operation of the line and provide a guarantee. With acid, alkali, heat aging and resistance to electricity capacity, good sealing performance, to ensure that no moisture within the insulation characteristics. Good anti-brittle performance of composite insulators, shock force strong, BREAKING composite suspension insulator does not occur [FXBW5-66 / 70, FXBW4-220 / 160] the role of the internal structure of the composite insulators is directional, which is in It was found that the fruit fly. Drosophila (D.melanogaster) yellow locus inserted the transposon gypsy y, will cause some tissue y gene inactivation, but some organizations y gene was still active, the reason is that one end of the transposon gypsy There is a insulator sequence. When the gypsy inserted at different positions "/ locus on to the active genes have different effects. This is because the active y gene enhancer controlled by four, when the insulator is inserted just upstream of the promoter, on the shoulder wings (wing blade) and somatic epithelial activation (body cuticle) tissue blocking the gene (from the upstream The enhancer), but does not block the setae (bristles) and tarsal foot (farsal claws) tissues y gene expression (enhancer from downstream). Composite suspension insulator [FXBW5-66 / 70, FXBW4-220 / 160] composed of composite pin insulator is made of epoxy glass fiber rods with Stubbs, a polymeric silicon rubber umbrella sleeve and connected at both ends with gold three parts. Composite suspension insulator [FXBW5-66 / 70, FXBW4-220 / 160] quality epoxy glass fiber rods with Stubbs with high tensile strength, generally up to 600Mpa above, is 2 times that of ordinary steel, ceramic materials 5 to 8 times, and has excellent electrical insulation properties, resistance to chemical corrosion resistance, good bending and torsional strength, creep and impact resistance. Polymeric silicon rubber umbrella cover has a good hydrophobicity, high tolerance flash capability and good corrosion resistance, aging resistance, compared with porcelain insulators in the same condition flashover voltage is porcelain more than 2 times.