Arrester according to its development can be divided into: protection gap - is the simplest form of arrester; tube arrester - is also a protective gap, but it can extinguish itself after discharge; valve arrester - is a single discharge The gap is divided into many short series gaps, and at the same time, the nonlinear resistance is increased to improve the protection performance. The magnetic lightning arrester, which uses the magnetic blow spark gap, improves the arc extinguishing ability and also has the ability to limit the internal overvoltage; Arrester - Uses the ideal volt-ampere characteristics of zinc oxide valves (high nonlinearity, ie low resistance at high currents, limits the voltage across the arrester, and exhibits high resistance at normal line voltage). The advantages of no backlash, low residual voltage and no residual current can also limit internal overvoltage and are widely used.
At present, the bottleneck and disadvantage of large scale development and manufacturing of isotropic Graphite in China still exist: the design and manufacture of large, special cold and other static presses have not kept up with it. (2) other facilities not perfect, such as the large and super large (1200 mm) Φ graphite impregnated, roasting, graphitization, purification processing, special machine tools machining must be perfect.
Fortunately, there are now cold and other static press factory to start to design and manufacture the large specification (1200mm) cold isostatic pressing machine, if the successful two years can be put into production. At the same time, the development of large scale homogenated graphite is also used in the development of vibration-forming graphite, carbon/carbon composite materials, carbon fiber and other materials used in silicon crystal production.
In the face of such a huge graphite market prospect, and graphite profound understanding to the graphite pieces processing technology progress is the precondition that the future market share, the graphite with milling, car, plane, cutting, drilling, grinding and CNC (CNC), main products including graphite, graphite mold, such as thermal field static pressure graphite, High Purity Graphite, EDM graphite, graphite crucible, graphite flake, Graphite Powder for the SPD, all kinds of graphite profiled, etc., products are now widely used in solar photovoltaic (pv), mold, electronic semiconductor, electrical discharge machining, metallurgy, chemical industry, nuclear industry and quartz, etc. We hope to cooperate with you and develop together with you in the future.
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Fengcheng Ruixing Carbon Products Co., Ltd , http://www.lnfcrxts.com