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    • 3. 发明授权
    • Load selector for step transformers
    • 步进式变压器负载选择器
    • US4978815A
    • 1990-12-18
    • US415060
    • 1989-09-29
    • Siegbert BergerKarl KurzAlfred Mayer
    • Siegbert BergerKarl KurzAlfred Mayer
    • H01F29/04H01H9/00H01H19/12H01H19/62H01H33/66
    • H01F29/04H01H9/0038H01F2029/143
    • A load selector for switching over from one tap of a step transformer to the next includes fixed step contacts disposed on a circle and connected to taps of a step transformer. At least two switch contacts per phase are disposed in common on a pivotable contact carrier and are simultaneously pivotable on the circle. Two vacuum switches per phase are electrically built into the contact carrier and connected in series with the switch contacts. A cam race is disposed along the circle. Rollers run along the cam race for actuating the vacuum switches. The cam race and the rollers are current free. A slip ring is coaxial with the cam race and the circle. The cam race is disposed axially between and spaced apart from the fixed step contacts and the slip ring. Slip contacts slide on the slip ring. Each of the vacuum switches are eletrically connected between a respective one of the switch contacts and a respective one of the slip contacts.
    • 用于从步进变压器的一个抽头切换到下一个的负载选择器包括设置在圆周上并连接到阶跃变压器的抽头的固定级联触点。 每相至少两个开关触点共同设置在可枢转的触点载体上,同时可在圆上枢转。 每相两个真空开关电气内置在触点载体中并与开关触点串联连接。 沿着圆圈设置凸轮赛。 滚轮沿着凸轮运动,用于启动真空开关。 凸轮和滚子是免费的。 滑环与凸轮轴和圆圈同轴。 凸轮轴线轴向地设置在固定台阶接触件和滑环之间并与之分开。 滑动触点在滑环上滑动。 每个真空开关电连接在相应的一个开关触点和相应的一个滑动触点之间。