Layered composite contacts

Abstract

The invention discloses layered composite contacts which comprise an A contact and a B contact, wherein the A contact and the B contact share the same structure. Each contact comprises inner and outer layers, and an identification layer which is located between inner and outer layers, wherein at least one identification layer is arranged. The shape of each identification layer is the same as the shape of the outer contour of each contact. Each identification layer is conductive. Each identification layer is made of a material different from inner and outer layers. According to the layered composite contacts, by observing the state of each identification layer, the service life of a contact can be directly and accurately judged; misjudgment of the subsequent service life of a contact can be avoided, wherein misjudgment is caused by incomplete data or specific monomers of a dimension measurement method; each contact is identified by an identification layer; the use state of each contact can be visually displayed; and precise component maintenance is realized.

Description

technical field [0001] The invention relates to the field of electrical components, in particular to a layered composite contact. Background technique [0002] Commonly used contacts on electrical components such as circuit breakers, contactors, and relays include pure metal and alloy contacts made by smelting and electroplating methods, and composite contacts made by powder metallurgy and internal oxidation. After the electrical components have been used for a period of time, they need to be repaired to ensure the stability of the circuit. Judging the later life of the components according to the state of the contacts is an important basis for the maintenance of the components. [0003] Prior art 1 is to calculate the wear and estimate the follow-up service life by comparing the new product factory size of the contact with the contact outline size of the overhauled product during the maintenance of the contact. The disadvantages are: incomplete data or single When there is...

AI Technical Summary

Problems solved by technology

[0003] Prior art 1 is to calculate the wear and estimate the follow-up service life by comparing the new product factory size of the contact with the contact outline size of the overhauled product during the maintenance of the contact. The disadvantages are: incomplete data or single There will be a large error in the judgment of the subsequent service life of the contact when the body is specific, resulting in over-repair or under-repair of the overhaul

Its disadvantages are: because the resistance value is not only related to the material of the contact, but also depends on the contact force of the contact and the shape of the contact, so there is a certain error in judging the life of the contact based on the contact resistance

Its disadvantages are: the number of effective use of contacts determined by the type test is limited by the difference between the test environment and actual use conditions and can only be used as a reference, and the counter often has various faults in actual use, resulting in data errors, so this The maintenance method can only be used as an auxiliary means

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