Contactor capable of automatically replacing contact points

Abstract

The invention discloses a contactor capable of automatically replacing a contact point, and the contactor comprises a protection housing, wherein the protection housing is internally provided with a connection cavity, and the bottom wall of the connection cavity is internally provided with two electromagnetic cavities in a communicated manner. According to the invention, the ontactor is simple instructure and convenient to use, and different from an existing contactor; the main contact is arranged to be movable, so the moving distance of the contact after an electromagnet is started is lengthened, the situation that the contact cannot make contact due to the jamming phenomenon during movement can be prevented, and the situation that the contactor cannot work normally is avoided; meanwhile, a rotating device is arranged, replacement can be carried out when the working performance of one contact is poor, the surface of the replaced contact is cleaned, and the phenomenon that the contactpoint contact mode is changed into point contact, and consequently non-conduction occurs is avoided; and a disconnecting device is further arranged, so the contactor can be stopped working when the current in the circuit is overlarge, and instrument damage caused by overlarge current after a load is connected to the circuit is prevented.

Description

technical field [0001] The invention relates to the technical field of contactors, in particular to a contactor for automatically replacing contact points. Background technique [0002] A contactor refers to an electrical appliance that uses a coil to flow current to generate a magnetic field to close the contacts to control the load. However, after a long time of use, the unreliable contact of the contacts will increase the contact resistance between the dynamic and static contacts, resulting in excessive temperature of the contact surface, making the surface contact into point contact, and even non-conduction. The reasons are: there are foreign objects on the contacts; the surface of the contacts is oxidized due to long-term use; arc burns cause defects in the contacts or the formation of metal shavings; The inspection and repair of the contactor needs to consume a certain amount of manpower and material resources. Therefore, a contactor that can solve the above problems ...

AI Technical Summary

Problems solved by technology

However, after a long time of use, the unreliable contact of the contacts will increase the contact resistance between the dynamic and static contacts, resulting in excessive temperature of the contact surface, making the surface contact into point contact, and even non-conduction. The reasons are: there are foreign objects on the contacts; the surface of the contacts is oxidized due to long-term use; arc burns cause defects in the contacts or the formation of metal shavings; The inspection and repair of the contactor requires a certain amount of manpower and material resources. Therefore, a contactor that can solve the above problems is needed

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