{"id":3129,"date":"2022-03-25T01:53:44","date_gmt":"2022-03-24T16:53:44","guid":{"rendered":""},"modified":"2022-09-26T17:29:23","modified_gmt":"2022-09-26T08:29:23","slug":"%e3%80%90%e6%a5%ad%e7%a8%ae%e5%88%a53%e3%80%91%e9%98%b2%e8%a1%9b%e6%a5%ad%e7%95%8c%e3%81%ae%e3%82%b1%e3%83%bc%e3%83%96%e3%83%ab%e3%83%bb%e3%83%af%e3%82%a4%e3%83%a4%e3%83%bc%e3%83%8f%e3%83%bc%e3%83%8d","status":"publish","type":"electrical-knowledge","link":"https:\/\/www.naccorporation.com\/en\/learning-center\/electrical-knowledge\/3129","title":{"rendered":"[Industry 3] Testing of cables and wire harnesses in the defense industry"},"content":{"rendered":"<div class=\"c-movie\">\r\n<iframe loading=\"lazy\" width=\"560\" height=\"315\" src=\"https:\/\/www.youtube.com\/embed\/FiagnDWGYSQ\" title=\"YouTube video player\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture\" allowfullscreen><\/iframe><\/div>\r\n<div class=\"c-spacer--s\">\r\n\r\n\r\n<h3>Requirements and features of harness testing in the defense industry<\/h3>\r\n<div class=\"c-spacer--s\"><\/div>\r\n<h4>1. Overview<\/h4>\r\n<p>\r\nHigh-quality testing is essential for harnesses and cables used in helicopters, special vehicles, ships, and guidance systems.<\/br>\r\nAs a specialized manufacturer of harness testers, NAC CORPORATION has achievements in harness testing for the defense industry.<\/p>\r\n<\/br>\r\n<ul>\r\n<li>\u30fbCompact, lightweight, airtight, and noise-resistant\r\n<\/li>\r\n<li>\u30fbDesigned to withstand extreme environments.<\/li>\r\n<li>\u30fbReliability is achieved in accordance with the high requirements of various standards (Ministry of Defense standards, MIL, JIS, etc.)<\/li>\r\n\r\n<li>\u30fbRecord and long-term storage of all pass\/fail results and all measurable information.<\/li>\r\n<li>\u30fbMultiple processes with intermediate and final testing due to the huge size of the harness<\/li>\r\n\r\n<\/ul>\r\n<\/div>\r\n<div class=\"c-spacer--s\">\r\n<h4>2. Testing of cables and wire harnesses in the defense industry\r\n<\/h4>\r\n<ul>\r\n<li>\u30fbWiring, resistance, dielectric withstand voltage, and insulation testing are conducted.<\/li>\r\n<li>\u30fbThe threshold resistance value for the wiring testing is clearly determined. For example : 1\u03a9 or lower for continuity, 10M\u03a9 or higher for open (insulation).<\/li>\r\n\r\n<li>\u30fbResistance testing requires measurement at the 1\u03a9 level.  In some cases, Kelvin connection (4-wire low-resistance testing) is required to measure and determine the pure conductor resistance of the tested target.<\/li>\r\n\r\n<li>\u30fbDielectric withstand voltage testing is conducted for 60 seconds per application. The application method can be either one-to-all or one-to-one scanning.<\/li>\r\n<li>\u30fbDC testing is required for long cables because of the influence of capacitive reactance.<\/li>\r\n\r\n<li>\u30fbInsulation resistance testing is conducted using the scan method or connector-by-connector as required specifications.<<\/li>\r\n<li>\u30fbHigh-quality testing is conducted by specifying the high and low sides of the application, setting different voltages and insulation resistance values for each circuit.<\/li>\r\n<li>\u30fbDemand for momentary disconnection testing to check continuity under shock and vibration is also increasing.<\/li>\r\n<\/ul>\r\n<\/div>\r\n\r\n\r\n\r\n\r\n\r\n<div class=\"c-spacer--s\">\r\n<h4>3. Operation<\/h4>\r\n<ul>\r\n<li>\u30fbA variety of information is involved in the test results. The inspection sheet contains the actual measured values and judgment results of each test for each wire.<\/li>\r\n<li>\u30fbThe test target is huge, so a wheeled wagon-type tester is installed for the operation.<\/li>\r\n<li>\u30fbNAC Corporation's harness testers adopt special semiconductor relays that have no contact life and are very popular in the defense industry.<\/li>\r\n<li>\u30fbNAC CORPORATION's testers are maintenance-free and have a low tendency to fail.<\/li>\r\n<li>\u30fbNAC CORPORATION also provides quick calibration services to prove traceability.<\/li>\r\n<\/ul>\r\n<\/div>\r\n\r\n\r\n<p>We have experience in harness testing in the defense industry worldwide. \r\nFor quality and efficient testing, please contact NAC Corporation.<\/p>\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n","protected":false},"author":1,"featured_media":3130,"menu_order":22,"template":"","meta":[],"electrical-knowledge-cat":[127],"electrical-knowledge-tag":[],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/www.naccorporation.com\/en\/wp-json\/wp\/v2\/electrical-knowledge\/3129"}],"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\/1"}],"version-history":[{"count":0,"href":"https:\/\/www.naccorporation.com\/en\/wp-json\/wp\/v2\/electrical-knowledge\/3129\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.naccorporation.com\/en\/wp-json\/wp\/v2\/media\/3130"}],"wp:attachment":[{"href":"https:\/\/www.naccorporation.com\/en\/wp-json\/wp\/v2\/media?parent=3129"}],"wp:term":[{"taxonomy":"electrical-knowledge-cat","embeddable":true,"href":"https:\/\/www.naccorporation.com\/en\/wp-json\/wp\/v2\/electrical-knowledge-cat?post=3129"},{"taxonomy":"electrical-knowledge-tag","embeddable":true,"href":"https:\/\/www.naccorporation.com\/en\/wp-json\/wp\/v2\/electrical-knowledge-tag?post=3129"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}