First, [FNB4-20 / 70, FNB4-10 / 70] composite insulators Features ● ???? small size, light weight, is about the same voltage level of porcelain insulators 1/5 ~ 1/9, impact-resistant, easy to transportation and installation. ● High ???? mechanical strength, structure reliable, stable performance, safe operation of a large margin. ● ?? ?? excellent electrical performance of composite insulators, silicone rubber with good hydrophobicity and mobility, strong fouling flash ability, in the safe operation of heavy contamination areas, and does not require manual cleaning, maintenance-free measured value of zero. ● ???? composite insulators with acid, alkali, heat aging resistance to brittle performance, shock force strong, brittle fracture will not occur. ● ???? composite insulators interchangeability can be used interchangeably with porcelain insulators. Second, [FNB4-20 / 70, FNB4-10 / 70] the mechanical properties of composite insulator composite insulator mainly by unidirectional glass fiber reinforced resin with Stubbs rods (commonly known as a mandrel) to bear mechanical loads. Fiberglass rods with Stubbs most prominent features namely high tensile strength and specific strength. The withdrawal of the glass fiber in the axial direction of the forward bearing arrangement, it has a high axial tensile strength, generally up to 1000 MPa or more. Thus diameter of only 18 mm of lead pull rod, the tensile breaking strength can reach more than 250 kN. Also, because the density of lead pull rod is generally only 2.0 g / cm3, so its strength (tensile strength to weight ratio) of 5 to 6 times the high-quality carbon structural steel. The withdrawal of high-strength, high specific strength characteristics, it is a composite insulators of high strength, light weight, thin rod diameter foundation. Although entirely on glass fiber composite insulators The withdrawal of mechanical load to bear, but the intensity is not equal to the strength of the mandrel composite insulators, this is because the mandrel load must pass through the insulator end fitting to tower and transmission lines and wires are connected. The ends of the connection must be the most concentrated areas of mechanical stress, a different connection structure will lead to different stress concentration, thus the mechanical strength of the composite insulators is actually greater than on the mechanical strength of the mandrel, but its the mechanical strength of the connection end portion, i.e. the use of the strength of the mandrel. Using the same mandrel connection structure different composite insulators, the mechanical strength is different, so the use of the intensity is different mandrel. Third, the Company: Shanghai Yi Electric Co., Ltd. is the production of expensive insulators, surge arresters, fuse, professional plant. Its strategic location, the enterprise can demand independence for product design, to ensure that up to your satisfaction according to different customers. And quickly put into mass production. After which the quality of national standards verification. The enterprises based on the market, user-centric, with the best quality, best price, timely delivery, good service, please call