Publish Time: 2022-05-23 Origin: Site
We need to ensure the quality and reliability of the insulated terminals and prevent the occurrence of the above-mentioned fatal failures. It is recommended that by the technical conditions of the products, research and development of the corresponding screening technology requirements to carry out the following targeted reliability tests to prevent failure.
Here is the content:
l Prevention of poor contact
l Prevention of poor insulation
l Prevention of poor fixing
Conductivity testing
In 2012, the generally insulated terminals manufacturers product acceptance test without this project, and users are generally required to conduct the test after installation. Therefore, it is recommended that manufacturers of some key models of products should increase 100% of the point-by-point conduction test.
Instantaneous break detection
Some insulated terminals are used in the dynamic vibration environment. Experimental evidence only with the test static contact resistance is qualified, and cannot guarantee that the dynamic environment uses a reliable contact. Because often contact resistance qualified connectors in vibration, shock and other simulated environmental tests still appear instantaneous power-off phenomenon, some of the high-reliability requirements of the insulated terminals. It is best to 100% of its dynamic vibration test to assess its contact reliability.
Insulation material inspection
The quality of raw materials has a great impact on the insulation performance of the insulated terminals. Therefore, the choice of raw material manufacturers is particularly important, not just reducing the cost and losing the quality of materials. Should choose a good reputation of the big factory materials. And for each batch of materials to be carefully checked to check the batch number, material certification, and other important information. Do a good job of material use traceability information.
Insulation resistance check of insulator
In 2012, some production plants process regulations assembly into finished products and then test the electrical properties, the results due to the insulated terminals itself insulation resistance failed, only to scrap the whole batch of finished products. A reasonable process should be in the insulator parts state on 100% of the process screening to ensure that the electrical properties of qualified.
Interchangeability inspection is a dynamic inspection of an insulated terminal. It requires the same series of matching plugs and sockets can be connected, from which to find out whether it is due to the insulator, contact parts and other parts of poor size, the lack of parts or assembly is not in place, etc. caused by the inability to plug, positioning and locking, even under the action of rotational force caused by the disintegration. Interchangeability check is another role is through the thread, bayonet and other plugging connections can be found in time whether there is a metal surplus affecting the insulation performance. Therefore, for some important purposes, the insulated terminals should be 100% of the project inspection, to avoid such a major fatal failure accident.
No reliable insulated terminal, and there is no reliable system engineering. The terminal reliability screening to find a variety of failure modes and failure mechanisms can lead to a large number of lessons learned and exclude all kinds of hidden dangers, to improve the design, process, inspection and use to provide a scientific basis, it is also the revision and development of insulated terminal technical conditions of the important basis.