Reliability Screening Inspection for Preventing Failure of Terminal Blocks

To ensure the quality and reliability of terminals blocks and prevent the occurrence of the above fatal failures, it is recommended to study and formulate corresponding screening technical requirements according to the technical conditions of the products, and carry out the following targeted failure prevention reliability inspections.

This is the content:

• Prevent poor contact

• Prevention of poor insulation

• Prevention of poor fixation

Prevent poor contact

1) Continuity detection

In 2012, there is no such item in the product acceptance test of the terminal blocks manufacturer, and the user generally needs to conduct a continuity test after installation. Therefore, it is suggested that manufacturers should add 100% point-by-point continuity detection to some key models of products.

2) Instantaneous interruption detection

Some terminals blocks are used in dynamic vibration environments. Just checking whether the static contact resistance is qualified cannot guarantee reliable contact in a dynamic environment. Because the connectors with qualified contact resistance often still have momentary power failures during simulated environmental tests such as vibration and shock, it is best to conduct 100% dynamic vibration tests for some terminals blocks that require high reliability.

Prevention of poor insulation

1) Insulation material inspection

The quality of the raw materials of the terminals blocks has a great influence on the insulating properties of the insulators. Therefore, the choice of raw material manufacturers is particularly important. You cannot blindly reduce costs and lose the quality of materials. You should choose materials from large manufacturers with a good reputation. For each batch of incoming materials, you should carefully check and inspect important information such as batch numbers and material certificates. Do a good job of Traceability information on the use of materials in terminals blocks.

2) Insulator insulation resistance inspection

As of 2012, some production plants require terminals blocks to be assembled into finished products before testing their electrical properties. As a result, because the insulation resistance of the insulator itself is unqualified, the entire batch of finished products has to be scrapped. A reasonable process should be 100% process screening in the state of insulator parts to ensure qualified electrical performance.

Prevention of poor fixation

The terminals block interchangeability check is dynamic. It requires that the same series of matching plugs and sockets can be connected, and it is found whether there is any failure to insert, locate and lock due to the oversize of insulators, contacts, and other parts, missing parts, or improper assembly, and even disintegrate under the action of rotational force. Another function of the interchangeability inspection is to detect in time whether there is any metal excess that affects the insulation performance through plug-in connections such as threads and bayonets. Therefore, 100% of the terminal blocks for some important purposes should be checked for this item to avoid such major fatal failure accidents.

The above is the relevant content about the reliability screening test of terminal blocks to prevent failure. If you are interested in terminals blocks, you can contact us. Our website is https://www.chsplastics.com/.