功能说明编辑
Function description editor
交流接触器利用主接点来开闭电路，用辅助接点来导通控制回路。
The AC contactor uses the main contact to turn on and off the circuit and use auxiliary contacts to control the loop.
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。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。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关。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。接触器具有可高频率的做电源开启与切断控制﹐高操作频率甚至可达每小时1200次也没问题。而接触器的使用寿命很高，机械寿命通常为数百万次至一千万次，电寿命一般则为数十万次至数百万次。
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. The contact of AC contactor is made of silver tungsten alloy with good electrical conductivity and high temperature resistance. The action power of the AC contactor comes from the AC electromagnet, and the electromagnet is made up of two "mountain" shaped 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 short circuit ring is applied to the core surface. After the AC contactor loses power, it relies on the spring reset. The other half is the movable core, which is used to drive the switch between the main contact and the auxiliary contact as the core is fixed and fixed. 20 above the ampere contactor, with the arc extinguishing cover, the electromagnetic force generated by the disconnecting circuit is used to break the arcs quickly, so as to protect the contacts. The contactor has the power to turn on and cut off at high frequency, and the highest operation frequency can even reach 1200 times per hour. The contactor life is very high, the mechanical life is usually from millions to ten million times, and the electrical life is usually from hundreds of thousands to millions.