In the selection of the equalizing ring, according to the "Guiding Opinions on Synthetic Insulators" issued by the State Power Corporation, combined with the operating experience in the region and outside, under normal circumstances, products with voltage levels of 110kV and below do not have equalizing rings, 220kV products There is a voltage equalizing ring on the high voltage end, and a voltage equalizing ring on both ends of the 500kV product. Compared with porcelain or glass insulators, synthetic insulators are lighter in weight and windier.
Therefore, in order to improve the lightning resistance level of the selection of synthetic insulators under the premise of satisfying the tower head clearance at the maximum wind deviation of synthetic insulators, the structural height of synthetic insulators of various voltage levels is recommended to be 500kV≥4300mm, 220kV≥2050mm, 110kV≥1280mm, 35kV≥580mm, the corresponding minimum insulation distance is selected according to 500kV≥4100mm, 220kV≥1900mm, 110kV≥1100mm, 35kV≥450mm, the creepage ratio distance should be between 23-25m / MV, it should not be too large, otherwise it will effectively climb Instead, the distance will decrease.
Due to the large and small umbrella structure under the rain condition, the small umbrella is blocked by the large umbrella and has a certain dry area, which is not easy to form a continuous rain surface, and the anti-flashover performance is good. In the ice-covered area, according to the operating experience outside the area, the large and small umbrella structure The composite insulator is not easy to form a continuous conductive water film when melting ice, and the anti-flashover performance is better. Therefore, the size of the composite insulator structure should be an umbrella structure; in the selection of the connection method of the end fittings, the crimping process should be used to reduce dispersion To improve mechanical stability.
CAT7 Flat Patch Cable, A Flat cable design helps improve the look of your home or office. Flat cables are super flexible and can be run under the carpet or bent through corners or into desks.
A double stranded DU line from the latest BAI in ISO/IEC 11801 class 7 /F standard 1. It is mainly used for the application and development of ten thousand ZHI bit Ethernet DAO network technology.CAT7 is no longer an UNshielded twisted pair , but a shielded twisted pair, thus providing a combined attenuation to crossposition ratio of at least 500MHZ and an overall bandwidth of 600MHZ, more than twice that of CAT6 and Super Six lines, with a transmission rate of up to 10Gbps.In the CAT7 Ethernet Cable, each pair has a shield layer, and four pairs of wires together have a common shield layer.
In terms of physical structure, the additional shielding layer makes the CAT7 have a larger diameter.Another important difference is its ability to connect hardware. The parameters of the cat7 of systems require that all pairs of wires provide at least 60DB of integrated proximal winding at 600MHZ.The cat5e systems only require 43DB at 100MHZ and 46DB at 250MHZ for the CAT6.
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