Vacuum arc quenching chamber is laid in a sealed insulating cylinder, which significantly improve the ability of enduring environment and phase-phase insulation character.
2、设计了采用CuCr25触头材料、杯状纵磁场触头结构、开断能力很强的小型化真空灭弧室；真空灭弧室布置在封闭的绝缘筒内，提高了环境耐受能力，同时使相间绝缘性能显著提高。
参考来源 - 免维护真空断路器的理论与实践·2,447,543篇论文数据，部分数据来源于NoteExpress
The paper describes the basic switching impulse test results of phase-to-phase insulation in EHV substations and overhead lines.
本文叙述超高压变电所和架空线路中相间绝缘操作冲击试验的基本结果。
Measure each phase conductor to metal mask and to metal sleeve insulation resistance.
测量每相导体与金属屏蔽、金属套间的绝缘电阻。
Measure each phase metal mask, metal sleeve to ground insulation resistance.
测量每相金属屏蔽、金属套与大地之间的绝缘电阻。
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