Introduction Of Solid Sealed Pole

According to the development experience of vacuum interrupter external insulation, vacuum circuit breakers are divided into three stages: air insulation, composite insulation and solid-sealed pole insulation. Air insulation and composite insulation are greatly affected by the environment because the arc chamber or high-voltage live parts are exposed to the air. The solid-sealed pole insulation adopts APG technology, and uses epoxy resin to encapsulate and fix the vacuum arc chamber and the upper and lower outlets, so that the arc chamber and the upper and lower outlets form a whole with epoxy, and the insulation level is less affected by the external environment. Embedded Pole has the advantages of high insulation level, small environmental impact, dimensional accuracy, and easy assembly. It has a compact structure, small size and light weight, which has promoted the miniaturization of vacuum circuit breakers, and has therefore been rapidly promoted and developed. Solid-sealed poles have many advantages, and during production, they also put forward higher requirements for vacuum arc chambers, upper and lower outlet selection, epoxy formula, processing technology, etc. Therefore, great attention should be paid to the design and production of solid-sealed poles.