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Common Faults of Compact Splicing Connector

Significance of prevention

The plastic insulating materials and conductive parts of the terminal are directly related to the quality of the terminal, which determine the insulation and conductivity of the terminal respectively. The failure of any terminal block will lead to the failure of the whole system engineering. The bitter lessons learned at home and abroad in this regard are very profound.

Prevention is the purpose and analysis is the basis. In a sense, failure prevention is more important than failure analysis. It has more practical significance to ensure the quality and reliability of the terminal block.

From the perspective of use, the function of the wiring terminal should be: the place where the contact part is connected must be connected, and the contact is reliable. Where the insulation part should not be connected, it must be reliably insulated. There are three common forms of fatal failure of terminal blocks:

poor contact

The metal conductor inside the terminal is the core part of the terminal, which transmits the voltage, current or signal from the external wire or cable to the contact corresponding to its matching connector. Therefore, the contact must have excellent structure, stable and reliable contact retention and good conductivity. Due to unreasonable contact structure design, wrong material selection, unstable mold, out of tolerance machining size, rough surface, unreasonable surface treatment processes such as heat treatment and electroplating, improper assembly, poor storage and use environment and improper operation and use, poor contact will be caused at the contact part and mating part of the contact.

Poor insulation

The function of the insulator is to keep the contact parts in the correct position arrangement, and to insulate the contact parts and the contact parts and the shell from each other. Therefore, the insulating parts must have excellent electrical performance, mechanical performance and process molding performance. Especially with the wide use of high-density and miniaturized wiring terminals, the effective wall thickness of insulators becomes thinner and thinner. This puts forward stricter requirements for insulating materials, injection mold precision and molding process. Short circuit, electric leakage, breakdown and low insulation resistance will be caused due to the presence of metal residues, surface dust, welding flux and other pollution on the surface or inside of the insulator, the fusion of organic material precipitates and harmful gas adsorption film with the surface water film to form an ionic conductive channel, moisture absorption, mildew growth, aging of insulation materials and other reasons.