2016-01-31
The medium voltage switch consists of three core technologies, including arc extinguishing technology, structure and insulation mode. In terms of insulation, solid insulation and complete shielding technology, which is a revolutionary innovative insulation technology, but also a new trend in the development of switching technology. Xi'an high voltage switch Research Institute expert Li Mingxin said. In the arc quenching technology, the vacuum arc extinguishing is very advantageous, especially in the medium pressure field. At present, the architecture and the way of insulation is the overall technical trend that should be related to each other, can not completely simply look at the insulation or simply look at the architecture.
In the long run, the extinguishing technology is highly mature, within a decade or two, remove the mode of architecture technology will gradually disappear, because the withdrawable switch cabinet for easy maintenance to carry out the design, from a development point of view, switch in the future will achieve highly reliable, does not require maintenance, therefore, remove architecture will be to develop in the direction of fixed architecture. In addition, with the improvement of the compactness and reliability of the switch, the way of insulation will be realized through technical innovation. At present, there are several ways of insulation, such as air insulation, composite insulation, six sulfur fluoride gas insulation. These insulation technologies have their own limitations.
Emerging solid insulation is a good solution to the problem of insulation, but it is not the only solution. It has limitations and advantages. It is limited to solid insulation using epoxy resin, which is a by-product of oil, we can not get rid of this material, the real test of solid insulation technology is, how to use the epoxy resin with less. This is an important choice in the application of terminal distribution and terminal power system automation.
