ABB 切换电容器用交流接触器；UA*V 50HZ
交流接触器广泛用作电力的开断和控制电路。 (起到频繁开关作用)
AC contactors are widely used as power interrupting and controlling circuits. (play the role of frequent switching)
交流接触器利用主接点来开闭电路，用辅助接点来执行控制指令。
The AC contactor uses the main contact to turn on and off the circuit and use auxiliary contacts to cute the control instructions.
主接点一般只有常开接点，而辅助接点常有两对具有常开和常闭功能的接点，小型的接触器也经常作为中间继电器配合主电路使用。
The main contact is usually only a constant contact, and the auxiliary contact often has two pairs with constant and normally closed functions, and the small contactor is often used as the intermediate relay in conjunction with the main circuit.
交流接触器的接点，由银钨合金制成，具有良好的导电性和耐高温烧蚀性。
The contact of the AC contactor is made of silver tungsten alloy with good electrical conductivity and high temperature resistance.
交流接触器的动作动力来源于交流电磁铁，电磁铁由两个“山”字形的幼硅钢片叠成，其中一个固定，在上面套上线圈，工作电压有多种供选择。为了使磁力稳定，铁芯的吸合面，加上短路环。交流接触器在失电后，依靠弹簧复位。另一半是活动铁芯，构造和固定铁芯一样，用以带动主接点和辅助接点的开短。20安培以上的接触器加有灭弧罩，利用断开电路时产生的电磁力，快速拉断电弧，以保护接点。
The action power of the AC contactor comes from the AC electromagnet, and the electromagnet is made up of two "mountain" shaped young silicon steel sheets, one of which is fixed on the top of the coil, and the working voltage has a variety of options. In order to stabilize the magnetic force, the suction surface of the core and the short circuiting ring are added. After the AC contactor loses power, it relies on the spring reset. The other half is the movable iron core, which is constructed and fixed like the iron core to drive the opening of the main contact and the auxiliary contact. 20 above the ampere contactor, with an arc extinguishing hood, the electromagnetic force generated by the disconnecting circuit is used to rapidly break the arc to protect the contact point.