This paper presents the experimental results of conduction characteristic of triggered vacuum switch （TVS）. The effects on conduction characteristic

especially on minimum conduction voltage for different electrode polarity

distance between two electrodes

electrode shape.different triggered circuit and triggered energy. Load property of main circuit are inverstig-ated. The expepimental results show that minimum conduction volage of TVS is two orders of magnitude less than the spark gap switch. Therefore

it has the advantage of a wide range of operating voltage.