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一个理想开关必须满足以下条件:(1)安全性强;(2)寿命长(省工);(3)无环境污染;(4)价格低。自60年代中期真空断路器和真空接触器等首次投入运行以来,为了确立基本原理和应用技术做了许多研究工作,使开关接近理想。从而在电力配电系统和各种工业用电动机、变压器和电容器等方面,得到广泛应用。从遮断介质看,介质电压开关的世界市场受真空型和SF6气体型开关所支配。但是从产量上看,真空型开关得到不可抗拒的优势。对真空开关装置也提出了
An ideal switch must meet the following conditions: (1) safety; (2) long life (labor); (3) no environmental pollution; (4) the price is low. Since the first operation of vacuum circuit breakers and vacuum contactors, etc. in the mid-1960s, much has been done to establish basic principles and application techniques that make the switch nearly ideal. Thus in the power distribution system and a variety of industrial motors, transformers and capacitors, has been widely used. From the standoff medium, the world market for dielectric voltage switches is dominated by vacuum-type and SF6 gas-type switches. However, from the yield point of view, vacuum-type switches have irresistible advantages. Vacuum switchgear is also proposed