{"id":3622,"date":"2023-10-04T13:46:48","date_gmt":"2023-10-04T04:46:48","guid":{"rendered":"https:\/\/www.naccorporation.com\/en\/?post_type=electrical-knowledge&#038;p=3622"},"modified":"2023-10-04T17:39:22","modified_gmt":"2023-10-04T08:39:22","slug":"cable-harness-defects-testing-for-terminal-half-insertion-at-connector","status":"publish","type":"electrical-knowledge","link":"https:\/\/www.naccorporation.com\/en\/learning-center\/electrical-knowledge\/3622","title":{"rendered":"[Cable &#038; Harness Defects]  Testing for Terminal half-insertion at connector"},"content":{"rendered":"<div class=\"c-movie\">\r\n<iframe loading=\"lazy\" width=\"560\" height=\"315\" src=\"https:\/\/www.youtube.com\/embed\/o02feH3XbwM?si=LfXBT5qRY7a48sBU\" title=\"YouTube video player\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" allowfullscreen><\/iframe>\r\n<\/div>\r\n\r\n<div class=\"c-spacer--s\">\r\n<p>Terminal half-insertion is a manufacturing error commonly found in cables and harnesses. \r\nIn this video, we will introduce how this error occurs and a test to prevent outflow.<\/p>\r\n<\/div>\r\n\r\n<div class=\"c-spacer--s\">\r\n<h3>Why does \"Half-insertion of terminal\" occur?<\/h3>\r\n<img loading=\"lazy\" src=\"https:\/\/www.naccorporation.com\/en\/wp-content\/uploads\/2023\/10\/A.jpg\"  alt=\"Half-insertion of connector terminal causes the terminal to pull out\" width=\"280\" height=\"157.5\" padding=\"20\">\r\n<img loading=\"lazy\" src=\"https:\/\/www.naccorporation.com\/en\/wp-content\/uploads\/2023\/10\/C.jpg\"  alt=\"Momentary disconnection test is effective in preventing outflow of terminal disconnection due to half-insertion\" width=\"280\" height=\"157.5\" padding=\"20\">\r\n<img loading=\"lazy\" src=\"https:\/\/www.naccorporation.com\/en\/wp-content\/uploads\/2023\/10\/D.jpg\"  alt=\"Momentary disconnection phenomenon is caused by a combination of vibration or shock and cable defects.\" width=\"280\" height=\"157.5\" padding=\"20\">\r\n\r\n<\/br>\r\n<\/br>\r\n\r\n<p>\r\nIn many cases, the cause of terminal disconnection is half-insertion of terminals.\r\nWhat is terminal half-insertion?\r\n\r\nThis is a condition in which the terminal is not fully inserted into the connector and the locking is not functioning.\r\nSince housing is done by hand, errors can inevitably occur.\r\nTherefore, it is necessary to perform a test to detect errors. \r\n\r\n\r\nThere are five types of electrical tests for harnesses.\r\nWhat is an effective test for detecting terminal half-insertion??\r\nIt is difficult to detect by wiring testing and resistance testing since the resistance value is not expected to fluctuate even in the condition.\r\nAlso, applying a high voltage does not cause an error.\r\n\r\n<\/p>\r\n\r\n<\/div>\r\n<h3>Detection of terminal half-insertion at connector by momentary disconnection testing<\/h3>\r\n<img loading=\"lazy\" src=\"https:\/\/www.naccorporation.com\/en\/wp-content\/uploads\/2023\/10\/E.jpg\"  alt=\"Momentary disconnection phenomenon repeats continuity and disconnection\" width=\"280\" height=\"157.5\" padding=\"20\">\r\n<img loading=\"lazy\" src=\"https:\/\/www.naccorporation.com\/en\/wp-content\/uploads\/2023\/10\/F.png\"  alt=\"Old cable tester cannot check for momentary disconnections \" width=\"280\" height=\"157.5\" padding=\"20\">\r\n<img loading=\"lazy\" src=\"https:\/\/www.naccorporation.com\/en\/wp-content\/uploads\/2023\/10\/G.jpg\"  alt=\"nacman cable harness testers available to check for momentary disconnections.\" width=\"280\" height=\"157.5\" padding=\"20\">\r\n<\/br>\r\n<\/br>\r\n\r\n\r\n<p>\r\nMomentary disconnection testing is effective in detecting terminal half-insertion.\r\nMomentary disconnection is caused by a combination of product defects and the environment.\r\nIf the terminals are in contact, even slightly, conduction is possible.\r\nHowever, if the cable is defective, vibration or shock will cause momentary disconnection.\r\nIn the case of half-insertion, pulling the terminal loosens it, resulting in a momentary disconnection.\r\n\r\nMomentary disconnection testing is very effective as a countermeasure against the outflow of the terminal half-insertion products.\r\nDemand for this testing is increasing as devices become more functional and complicated.\r\n<\/br><\/br>\r\nThere are some old cable harness testers that are not available for momentary disconnection testing.\r\nIn many cases, our customers replace their old tester with our products in order to implement the momentary disconnection testing.\r\n\r\nWe would like to introduce methods to prevent terminal half-insertion in the automotive industry.\r\nFirst of all, a retainer is attached as a part to prevent half-insertion.\r\nIn addition, fixtures are used for test adapters.\r\nThe fixture is a pseudo-connector using a spring probe, and a lever is used to apply a certain amount of pressure to the terminal to make it conduct.\r\nIf the terminal is not inserted correctly, it is pushed out.\r\n\r\nIn addition, a momentary disconnection testing can be performed to further improve the quality of the fixture.\r\nThe fixtures are also being introduced outside of the automotive industry.\r\nPlease contact us about cable harness testers and fixtures to prevent terminal disconnection.\r\n<\/p>\r\n\r\n<\/br><\/br>\r\n\r\n<a class=\"c-btn c-btn--l\" href=\"\/en\/products\">Click here for NMG+ Hi-Pot Cable Harness Tester<\/a>\r\n","protected":false},"author":19,"featured_media":3627,"menu_order":3,"template":"","meta":[],"electrical-knowledge-cat":[155],"electrical-knowledge-tag":[],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/www.naccorporation.com\/en\/wp-json\/wp\/v2\/electrical-knowledge\/3622"}],"collection":[{"href":"https:\/\/www.naccorporation.com\/en\/wp-json\/wp\/v2\/electrical-knowledge"}],"about":[{"href":"https:\/\/www.naccorporation.com\/en\/wp-json\/wp\/v2\/types\/electrical-knowledge"}],"author":[{"embeddable":true,"href":"https:\/\/www.naccorporation.com\/en\/wp-json\/wp\/v2\/users\/19"}],"version-history":[{"count":0,"href":"https:\/\/www.naccorporation.com\/en\/wp-json\/wp\/v2\/electrical-knowledge\/3622\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.naccorporation.com\/en\/wp-json\/wp\/v2\/media\/3627"}],"wp:attachment":[{"href":"https:\/\/www.naccorporation.com\/en\/wp-json\/wp\/v2\/media?parent=3622"}],"wp:term":[{"taxonomy":"electrical-knowledge-cat","embeddable":true,"href":"https:\/\/www.naccorporation.com\/en\/wp-json\/wp\/v2\/electrical-knowledge-cat?post=3622"},{"taxonomy":"electrical-knowledge-tag","embeddable":true,"href":"https:\/\/www.naccorporation.com\/en\/wp-json\/wp\/v2\/electrical-knowledge-tag?post=3622"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}