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              來源:http://www.cekidots.com/ 日期:2021-08-10 發布人:tongjid


              There are many types of contactors, but at present, we still know too little, so we need to know more types. Therefore, Xiaobian takes the opportunity of updating the article on the website to introduce one of the contactors, AC contactors, so that we can understand more types of contactors and expand our knowledge.
              What are the inspection items of AC contactor during operation? How should we maintain it? Let's analyze and explain it in detail.
              1. Inspection items in operation
              (1) Whether the load current it passes is within the rated value of the contactor.
              (2) Whether the opening and closing signal indication of the contactor is consistent with the circuit state.
              (3) Whether the operation sound of the contactor is normal and whether the contact is good.
              (4) Whether the electromagnetic coil is overheated, and whether the short-circuit ring of the electromagnet is abnormal.
              (5) Whether the arc extinguishing cover is loose or damaged, whether the auxiliary contact is burned, and whether the transmission part is damaged.
              (6) Whether there are adverse factors in the surrounding environment or factors affecting the normal operation of the contactor, such as vibration, poor ventilation, dust, etc.
              2. Maintenance
              (1) The contactor shall be kept clean and tidy, and any dust shall be removed in time.
              (2) What is the wear condition of the contact and whether it needs to be repaired or replaced.
              (3) The resistance value of phase to phase insulation resistance shall not be less than 10m Ω.
              (4) Whether the contact action is flexible and whether the contact stroke meets the specified requirements.
              (5) Whether the iron core is fastened and loose.

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