This series of high-prototype high-voltage vacuum contactors, our company has developed a new type of vacuum contactor according to the needs of the market, using high-quality vacuum switch tubes from military factories, and the structure is composed of metal frames and insulating brackets, which are firm and reliable, and the performance is more stable. The center distance of the main circuit is up to 190mm~210mm, and the vacuum interrupter of the main circuit adopts a solid sealing structure, with stable and reliable insulation performance, large creepage distance along the surface, large stroke, and strong breaking capacity, which is suitable for plateau and high altitude areas below 2000-4000 meters above sea level, and is used for long-distance connection, analysis and frequent start and control of AC motors, transformers and capacitors. There are two types: electromagnetic holding and permanent magnet holding.