{"id":2554,"date":"2025-06-26T06:33:58","date_gmt":"2025-06-26T06:33:58","guid":{"rendered":"https:\/\/rifengcable.com\/?p=2554"},"modified":"2025-06-26T06:36:08","modified_gmt":"2025-06-26T06:36:08","slug":"6-insulation-killers-exposed-protect-your-cables","status":"publish","type":"post","link":"https:\/\/rifengcable.com\/sv\/6-insulation-killers-exposed-protect-your-cables\/","title":{"rendered":"6 Insulation Killers Exposed: Protect Your Cables Now"},"content":{"rendered":"<div class=\"row\"  id=\"row-1451479526\">\n\n\t<div id=\"col-2063017552\" class=\"col small-12 large-12\"  >\n\t\t\t\t<div class=\"col-inner\"  >\n\t\t\t\n\t\t\t\n<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_75 counter-hierarchy ez-toc-counter ez-toc-grey ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title\" style=\"cursor:inherit\">Inneh\u00e5llsf\u00f6rteckning<\/p>\n<span class=\"ez-toc-title-toggle\"><a href=\"#\" class=\"ez-toc-pull-right ez-toc-btn ez-toc-btn-xs ez-toc-btn-default ez-toc-toggle\" aria-label=\"Toggle Inneh\u00e5llsf\u00f6rteckning\"><span class=\"ez-toc-js-icon-con\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">Toggle<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #999;color:#999\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewbox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #999;color:#999\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewbox=\"0 0 24 24\" version=\"1.2\" baseprofile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/span><\/span><\/a><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/rifengcable.com\/sv\/6-insulation-killers-exposed-protect-your-cables\/#Insulation_resistance_determines_cable_life_Analysis_of_six_core_factors_and_new_material_breakthroughs\" >Insulation resistance determines cable life! Analysis of six core factors and new material breakthroughs<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/rifengcable.com\/sv\/6-insulation-killers-exposed-protect-your-cables\/#Material_factors_the_foundation_of_insulation_performance\" >Material factors: the foundation of insulation performance<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/rifengcable.com\/sv\/6-insulation-killers-exposed-protect-your-cables\/#Temperature_and_humidity_effect_resistor_killer_in_the_environment\" >Temperature and humidity effect: resistor killer in the environment<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/rifengcable.com\/sv\/6-insulation-killers-exposed-protect-your-cables\/#Electric_field_and_structure_invisible_stress_damage\" >Electric field and structure: invisible stress damage<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/rifengcable.com\/sv\/6-insulation-killers-exposed-protect-your-cables\/#Manufacturing_process_Quality_game_from_laboratory_to_workshop\" >Manufacturing process: Quality game from laboratory to workshop<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/rifengcable.com\/sv\/6-insulation-killers-exposed-protect-your-cables\/#Environmentally_friendly_new_materials_Green_revolution_in_insulation_technology\" >Environmentally friendly new materials: Green revolution in insulation technology<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/rifengcable.com\/sv\/6-insulation-killers-exposed-protect-your-cables\/#Full_life_cycle_protection_strategy\" >Full life cycle protection strategy<\/a><\/li><\/ul><\/li><\/ul><\/nav><\/div>\n<h2 id=\"insulation-resistance-determines-cable-life-analysis-of-six-core-factors-and-new-material-breakthroughs\"><span class=\"ez-toc-section\" id=\"Insulation_resistance_determines_cable_life_Analysis_of_six_core_factors_and_new_material_breakthroughs\"><\/span>Insulation resistance determines cable life! Analysis of six core factors and new material breakthroughs<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<blockquote>\n<p>The insulation resistance of wires and cables is like the immune system of the power system. It is invisible and intangible, but it determines the safety and life of the entire power network.<\/p>\n<\/blockquote>\n<p>The insulation resistance of wires and cables is the core indicator for evaluating their insulation performance, which is directly related to the safety and efficiency of power transmission. In the power system,\u00a0insulation resistance drop is one of the main causes of cable failure, which may cause serious consequences such as short circuit and fire.<\/p>\n<p>According to the national standard GB\/T 3048.5-2007, the insulation resistance value of 6~10KV cables should not be less than 400M\u03a9, while 20~35KV high-voltage cables must reach more than 600M\u03a9. These values \u200b\u200bseem abstract, but they indicate the health of the system like the blood pressure value of the human body.<\/p>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\n\t\n<\/div>\n<div class=\"row\"  id=\"row-746444165\">\n\n\t<div id=\"col-1430092814\" class=\"col small-12 large-12\"  >\n\t\t\t\t<div class=\"col-inner\"  >\n\t\t\t\n\t\t\t\n\t<div class=\"img has-hover x md-x lg-x y md-y lg-y\" id=\"image_1872243149\">\n\t\t\t\t\t\t\t\t<div class=\"img-inner dark\" >\n\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"1200\" height=\"796\" src=\"https:\/\/rifengcable.com\/wp-content\/uploads\/2025\/06\/19b327b3eea5163df8068fe6bd41c8701.jpg\" class=\"attachment-original size-original\" alt=\"Insulation resistance determines cable life\" srcset=\"https:\/\/rifengcable.com\/wp-content\/uploads\/2025\/06\/19b327b3eea5163df8068fe6bd41c8701.jpg 1200w, https:\/\/rifengcable.com\/wp-content\/uploads\/2025\/06\/19b327b3eea5163df8068fe6bd41c8701-300x199.jpg 300w, https:\/\/rifengcable.com\/wp-content\/uploads\/2025\/06\/19b327b3eea5163df8068fe6bd41c8701-1024x679.jpg 1024w, https:\/\/rifengcable.com\/wp-content\/uploads\/2025\/06\/19b327b3eea5163df8068fe6bd41c8701-768x509.jpg 768w, https:\/\/rifengcable.com\/wp-content\/uploads\/2025\/06\/19b327b3eea5163df8068fe6bd41c8701-18x12.jpg 18w, https:\/\/rifengcable.com\/wp-content\/uploads\/2025\/06\/19b327b3eea5163df8068fe6bd41c8701-600x398.jpg 600w\" sizes=\"auto, (max-width: 1200px) 100vw, 1200px\" title=\"\">\t\t\t\t\t\t\n\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\n<style>\n#image_1872243149 {\n  width: 100%;\n}\n<\/style>\n\t<\/div>\n\t\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\n\t\n<\/div>\n<h3 id=\"material-factors-the-foundation-of-insulation-performance\"><span class=\"ez-toc-section\" id=\"Material_factors_the_foundation_of_insulation_performance\"><\/span>Material factors: the foundation of insulation performance<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>The\u00a0inherent characteristics\u00a0of insulating materials are the prerequisites for determining the insulation resistance of cables. The molecular structure and chemical properties of different materials directly affect their resistivity performance:<\/p>\n<ul>\n<li>Cross-linked polyethylene (XLPE): It has a highly cross-linked molecular structure and its resistivity is significantly better than that of traditional PVC materials, making it the mainstream choice for medium and high voltage cables.<\/li>\n<li>Silicone rubber: The special silicone molecular chain gives it wide temperature range stability, and can maintain resistance stability in an environment of -60\u2103~+180\u2103, especially suitable for extreme environments such as metallurgy and chemical industry.<\/li>\n<li>Material purity: When the impurity content exceeds 0.01%, metal particles or moisture will form a\u00a0conductive channel, causing the insulation resistance to drop by up to 30%.<\/li>\n<\/ul>\n<p>Material aging is another invisible killer. Thermal aging will cause the polymer chain to break, and electrical aging will cause partial discharge to form a carbonization channel. Test data shows that if unqualified products are used, the\u00a0life of Class B insulation materials that work at 130\u2103 for a long time will be shortened by more than 40%.<\/p>\n<h3 id=\"temperature-and-humidity-effect-resistor-killer-in-the-environment\"><span class=\"ez-toc-section\" id=\"Temperature_and_humidity_effect_resistor_killer_in_the_environment\"><\/span>Temperature and humidity effect: resistor killer in the environment<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>The effect of temperature and humidity on insulation resistance shows an\u00a0exponential change law:<\/p>\n<ul>\n<li>For every 10\u2103 increase in temperature, the insulation resistance may drop by more than 50%. For example, the insulation resistance value of the control cable at 70\u2103 is only 10% of that at 20\u2103. This is because the molecular thermal motion intensifies and the ion mobility increases, resulting in a surge in leakage current.<\/li>\n<li>Humidity exceeds 70%: Water ionization produces conductive ions, especially forming a\u00a0conductive film\u00a0on the surface of the material, which increases the surface leakage current. What\u2019s more dangerous is that water infiltration will form water dendrites, which will eventually develop into electrical dendrites and cause breakdown.<\/li>\n<\/ul>\n<p>The synergistic effect of moisture and heat is particularly deadly: a change from 25\u2103 to 100\u2103 may cause a 100,000-fold change in resistance, and a change in humidity from 25% to 95% can also bring a 100-fold impact. This explains why the cable failure rate in humid areas in the south is significantly higher than that in dry areas.<\/p>\n<h3 id=\"electric-field-and-structure-invisible-stress-damage\"><span class=\"ez-toc-section\" id=\"Electric_field_and_structure_invisible_stress_damage\"><\/span>Electric field and structure: invisible stress damage<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>The matching degree between electric field strength and insulation structure\u00a0is the core challenge of high-voltage cable design:<\/p>\n<p>When the operating voltage exceeds the design threshold, electric field distortion will cause local discharge (corona phenomenon). This continuous discharge is like repeatedly piercing the insulation layer with a needle tip,\u00a0gradually eroding to form a carbonized channel. Space charge accumulation will also occur under DC voltage, further distorting the electric field distribution.<\/p>\n<p>The design of insulation layer thickness must follow the \u201cgolden ratio\u201d:<\/p>\n<ul>\n<li>Increasing the thickness by 50% can increase the insulation resistance by about 60%<\/li>\n<li>But too thick will cause heat dissipation difficulties and cost surges<\/li>\n<\/ul>\n<p>Structural defects are latent \u201ctime bombs\u201d. The inspection rules of Shaoxing Market Supervision Bureau specifically emphasize:\u00a0Bubbles, cracks or impurities in the insulation layer\u00a0will cause a sudden drop in local resistance, causing dendritic discharge in long-term operation. Damage to the armor layer will cause the cable to lose mechanical protection and accelerate erosion by environmental factors.<\/p>\n<h3 id=\"manufacturing-process-quality-game-from-laboratory-to-workshop\"><span class=\"ez-toc-section\" id=\"Manufacturing_process_Quality_game_from_laboratory_to_workshop\"><\/span>Manufacturing process: Quality game from laboratory to workshop<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Even if high-quality materials are selected, slight deviations in the production process may lead to a cliff-like drop in insulation performance:<\/p>\n<ul>\n<li>Extrusion process: Temperature fluctuations exceeding \u00b15\u2103 may produce pores; improper cooling rate may cause internal stress cracks.<\/li>\n<li>Cross-linking process: For XLPE cables,\u00a0cross-linking degree less than 90%\u00a0will directly reduce heat resistance and insulation performance.<\/li>\n<li>Cleaning control: Fault analysis of a cable factory shows that if 1,000 dust particles are added per cubic meter in the production environment, the qualified rate of finished product insulation resistance will drop by 12%.<\/li>\n<\/ul>\n<p>Zhejiang Will Eagle Company\u2019s latest patent (CN120197070A) solves this problem through the\u00a0AI dynamic temperature control system: Based on the comprehensive value of the cable and historical data, the preparation temperature is adjusted in real time to control the process fluctuation within \u00b11\u2103, significantly improving the insulation uniformity.<\/p>\n<h3 id=\"environmentally-friendly-new-materials-green-revolution-in-insulation-technology\"><span class=\"ez-toc-section\" id=\"Environmentally_friendly_new_materials_Green_revolution_in_insulation_technology\"><\/span>Environmentally friendly new materials: Green revolution in insulation technology<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Traditional PVC cables contain heavy metals such as lead and cadmium, which pollute soil and water sources after being discarded. Its environmentally friendly alternatives have become the focus of the industry:<\/p>\n<ul>\n<li>Polypropylene insulated cable: No cross-linking process is required, and the production process is\u00a0zero pollution. The operating temperature can reach 105\u2103, and the current carrying capacity is more than 10% higher than that of traditional XLPE cables. Tens of thousands of kilometers have been deployed in Europe, and my country\u2019s Southern Power Grid\u2019s 110 kV grafted polypropylene cable has passed type testing.<\/li>\n<li>Recyclable thermoplastic elastomer: The products developed by Jinbei Electric can be\u00a0100% recycled and reused\u00a0after being discarded, breaking the pollution dilemma of the \u201ccable graveyard\u201d.<\/li>\n<li>Three-layer wrapped insulated wire: Suzhou Taiweida\u2019s patented technology (CN119252575A) uses three layers of PPS\/PET tape for wrapping, and the withstand voltage between any layers reaches 3KV, providing double protection for precision electronic equipment.<\/li>\n<\/ul>\n<p>These innovations not only meet the requirements of EU RoHS directive and other regulations, but also raise the cable insulation resistance temperature index to H level (180\u2103), meeting the 27% annual growth demand in the new energy field.<\/p>\n<h3 id=\"full-life-cycle-protection-strategy\"><span class=\"ez-toc-section\" id=\"Full_life_cycle_protection_strategy\"><\/span>Full life cycle protection strategy<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>From installation to scrapping, cable insulation resistance requires systematic protection:<\/p>\n<ul>\n<li>Laying stage: Excessive bending will squeeze the insulation layer, and dragging and friction will cause micro cracks. The specification requires that the bending radius\u00a0should not be less than 6 times the outer diameter\u00a0(shielded cable needs 10 times).<\/li>\n<li>Operation monitoring: The intelligent online monitoring system can provide real-time warning of the insulation resistance decline trend. After application in a chemical plant, the failure rate dropped by 65%. The secret is to set 1M\u03a9 as the shutdown threshold.<\/li>\n<li>Diagnostic technology:\u00a0Megaohmmeter test\u00a0must strictly follow GB\/T 3048.5 standard:<\/li>\n<li>1KV or less cables use 1KV megohmmeter<\/li>\n<li>Test time is controlled within 1 minute<\/li>\n<\/ul>\n<p>Regular testing is like doing an \u201celectrocardiogram\u201d for the cable:<\/p>\n<ul>\n<li>Quarterly testing finds that the resistance drops by &gt;20%: warning of accelerated aging<\/li>\n<li>Annual drop &gt;50%: must be replaced<\/li>\n<\/ul>\n<hr \/>\n<p>Insulation technology is undergoing a revolutionary breakthrough. Yanshan Petrochemical\u2019s 110 kV cable insulation material has achieved an\u00a0annual production capacity of 25,000 tons, which is used in high-end fields such as deep-sea cables. Suzhou Taiweida\u2019s three-layer wrapping patent increases the insulation layer\u2019s withstand voltage by 300%.<\/p>\n<p>The future belongs to\u00a0self-healing insulation materials\u00a0\u2013 when micro-damage occurs, the active ingredients in the material can automatically fill the cracks. As the power engineer said:\u00a0The invisible insulation resistance determines the visible power safety. Only with full-chain innovation from material genes to intelligent monitoring can a truly safe power network be built.<\/p>","protected":false},"excerpt":{"rendered":"<p>Materialfaktorer: grunden f\u00f6r isoleringsprestanda De inneboende egenskaperna hos isoleringsmaterial \u00e4r f\u00f6ruts\u00e4ttningarna f\u00f6r att best\u00e4mma kablars isolationsresistans. Den molekyl\u00e4ra strukturen och de kemiska egenskaperna hos olika material p\u00e5verkar direkt deras resistivitetsprestanda: Tv\u00e4rbunden polyeten (XLPE): Den har en h\u00f6ggradigt tv\u00e4rbunden molekyl\u00e4r struktur och dess resistivitet \u00e4r betydligt b\u00e4ttre \u00e4n den hos traditionell [\u2026]","protected":false},"author":3,"featured_media":2555,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-2554","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-uncategorized"],"_links":{"self":[{"href":"https:\/\/rifengcable.com\/sv\/wp-json\/wp\/v2\/posts\/2554","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/rifengcable.com\/sv\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/rifengcable.com\/sv\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/rifengcable.com\/sv\/wp-json\/wp\/v2\/users\/3"}],"replies":[{"embeddable":true,"href":"https:\/\/rifengcable.com\/sv\/wp-json\/wp\/v2\/comments?post=2554"}],"version-history":[{"count":2,"href":"https:\/\/rifengcable.com\/sv\/wp-json\/wp\/v2\/posts\/2554\/revisions"}],"predecessor-version":[{"id":2557,"href":"https:\/\/rifengcable.com\/sv\/wp-json\/wp\/v2\/posts\/2554\/revisions\/2557"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/rifengcable.com\/sv\/wp-json\/wp\/v2\/media\/2555"}],"wp:attachment":[{"href":"https:\/\/rifengcable.com\/sv\/wp-json\/wp\/v2\/media?parent=2554"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/rifengcable.com\/sv\/wp-json\/wp\/v2\/categories?post=2554"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/rifengcable.com\/sv\/wp-json\/wp\/v2\/tags?post=2554"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}