{"id":3624,"date":"2023-10-04T17:15:41","date_gmt":"2023-10-04T08:15:41","guid":{"rendered":"https:\/\/www.naccorporation.com\/en\/?post_type=electrical-knowledge&#038;p=3624"},"modified":"2023-10-04T17:38:28","modified_gmt":"2023-10-04T08:38:28","slug":"cable-harness-defects-insulation-failure-by-contamination","status":"publish","type":"electrical-knowledge","link":"https:\/\/www.naccorporation.com\/en\/learning-center\/electrical-knowledge\/3624","title":{"rendered":"[Cable &#038; Harness Defects] Insulation failure by contamination"},"content":{"rendered":"<div class=\"c-movie\">\r\n<iframe loading=\"lazy\" width=\"560\" height=\"315\" src=\"https:\/\/www.youtube.com\/embed\/hKdAEyiA_fk?si=BCfIo5OOf6LggXtD\" 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>Insulation failure by contamination is a manufacturing error commonly found in cables and harnesses. \r\nIn this video, we will show you how this error occurs and introduce an inspection to prevent outflow.<\/p>\r\n<\/div>\r\n\r\n<div class=\"c-spacer--s\">\r\n<h3>Why does \"Insulation failure by contamination\" occur?<\/h3>\r\n<img loading=\"lazy\" src=\"https:\/\/www.naccorporation.com\/en\/wp-content\/uploads\/2023\/10\/A-2.jpg\"  alt=\"Contamination inside the connector causes insulation resistance failure\" width=\"280\" height=\"157.5\" padding=\"20\">\r\n<img loading=\"lazy\" src=\"https:\/\/www.naccorporation.com\/en\/wp-content\/uploads\/2023\/10\/B-2.jpg\"  alt=\"When contaminants absorb moisture, leakage current increases and insulation resistance decreases\" width=\"280\" height=\"157.5\" padding=\"20\">\r\n<img loading=\"lazy\" src=\"https:\/\/www.naccorporation.com\/en\/wp-content\/uploads\/2023\/10\/C-2.jpg\"  alt=\"Prevent contamination of foreign matter by 5S\" width=\"280\" height=\"157.5\" padding=\"20\">\r\n\r\n<\/br>\r\n<\/br>\r\n\r\n<p>\r\nContamination inside the connector causes insulation failure.\r\nWhy does contamination cause insulation failure?\r\nWhen contaminants such as dust stick to the inside of a connector, they absorb moisture.\r\nMoisture absorbed by the contaminant makes it conduct electricity easily.\r\nIf high voltage is applied in this state, current will leak between the different conductors, resulting in insulation failure.\r\n\r\nTo prevent the outflow of contamination, it is first necessary to thoroughly implement the 5S and prevent the occurrence of defects.\r\nEven small, invisible contaminants can cause major problems if they get mixed in.\r\n<\/p>\r\n\r\n<\/div>\r\n<h3>Detection by electrical cable harness testing<\/h3>\r\n<img loading=\"lazy\" src=\"https:\/\/www.naccorporation.com\/en\/wp-content\/uploads\/2023\/10\/D-2.jpg\"  alt=\"Electrical detection of contamination effects by insulation resistance testing\" width=\"280\" height=\"157.5\" padding=\"20\">\r\n<img loading=\"lazy\" src=\"https:\/\/www.naccorporation.com\/en\/wp-content\/uploads\/2023\/10\/F-1-1.jpg\"  alt=\"Insulation resistance test can be performed after wiring test\" width=\"280\" height=\"157.5\" padding=\"20\">\r\n<img loading=\"lazy\" src=\"https:\/\/www.naccorporation.com\/en\/wp-content\/uploads\/2023\/10\/E-1.jpg\"  alt=\"To ensure accurate insulation resistance testing, the inspection environment should be dry.\" width=\"280\" height=\"157.5\" padding=\"20\">\r\n<\/br>\r\n<\/br>\r\n\r\n<p>\r\n\r\nWhat is the inspection to prevent outflow?\r\nImage inspection is not easy to introduce due to cost and tact time.\r\n\r\nInsulation resistance testing is effective in preventing defective outflow.\r\nHarness testers can be implemented in a series of wiring and dielectric withstand voltage tests, so the introduction is smooth.\r\nApply DC and measure the insulation resistance between different conductors.\r\nIf it is less than the set judgment value, it will fail the test.\r\n\r\nIf an error occurs, remove the foreign matter by an air duster.\r\nInsulation resistance testing is related to humidity. \r\nBy conducting insulation resistance testing under dry conditions,\r\nthe true insulation resistance value can be measured.\r\nIf the test cannot be performed correctly due to high humidity, the testing facility should be left in a dry environment to remove the humidity.\r\n\r\nPlease contact us about cable harness testers for detecting Insulation failure by contamination.\r\n<\/p>\r\n\r\n<\/br><\/br>\r\n<div class=\"c-spacer--s\">\r\n<h3><\/h3>\r\n<p>\r\n<\/p>\r\n<\/div>\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":3653,"menu_order":2,"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\/3624"}],"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\/3624\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.naccorporation.com\/en\/wp-json\/wp\/v2\/media\/3653"}],"wp:attachment":[{"href":"https:\/\/www.naccorporation.com\/en\/wp-json\/wp\/v2\/media?parent=3624"}],"wp:term":[{"taxonomy":"electrical-knowledge-cat","embeddable":true,"href":"https:\/\/www.naccorporation.com\/en\/wp-json\/wp\/v2\/electrical-knowledge-cat?post=3624"},{"taxonomy":"electrical-knowledge-tag","embeddable":true,"href":"https:\/\/www.naccorporation.com\/en\/wp-json\/wp\/v2\/electrical-knowledge-tag?post=3624"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}