auxiliary contact for Vacuum circuit breaker Applied in HV equipment,such as ... voltage circuit-breaker, high-voltage isolator, low-voltage isolator, low-voltage air switch and low-voltage knife switch, series F ... no explosion risk, no inductive dust, no air destroying insulators or corroding metal and so on. ... , the turning angle of series F10 could be 60°~90°~120°.Series F10 is devided into straight ...