Introduce the electroshock penetration, mechanism of vacuum induction furnace, analysis the reasons of it and put forword the methods to pvevent electroshock penetration.

• 摘要介绍了真空感应电炉电击穿的机理，分析了国产真空感应电炉电击穿的原因，提出了预防感应线圈匝间电击穿的各种措施。