{"id":4472,"date":"2025-04-10T11:56:49","date_gmt":"2025-04-10T11:56:49","guid":{"rendered":"https:\/\/hvtesttech.com\/?p=4472"},"modified":"2025-12-01T09:27:12","modified_gmt":"2025-12-01T09:27:12","slug":"insulation-resistance-testing-standards-understanding-iec-61557-compliance-in-2024","status":"publish","type":"post","link":"https:\/\/hvtesttech.com\/af\/insulation-resistance-testing-standards-understanding-iec-61557-compliance-in-2024\/","title":{"rendered":"Insulation Resistance Testing Standards: Understanding IEC 61557 Compliance in 2024"},"content":{"rendered":"<h3 class=\"wp-block-heading\"><strong>What is IEC 61557?<\/strong><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">The&nbsp;<strong>IEC 61557<\/strong>&nbsp;series is the global benchmark for electrical safety testing, governing equipment used to verify insulation resistance, ground continuity, and loop impedance in low-voltage systems. Specifically,&nbsp;<strong>IEC 61557-2<\/strong>&nbsp;defines the requirements for insulation resistance testers, ensuring they deliver accurate, repeatable results for compliance with standards like&nbsp;<strong>IEC 60364<\/strong>&nbsp;(electrical installations) and&nbsp;<strong>NFPA 70E<\/strong>&nbsp;(workplace safety).<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">For engineers, electricians, and facility managers, adherence to IEC 61557 isn\u2019t optional\u2014it\u2019s a legal and ethical obligation to protect personnel and equipment.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">At&nbsp;<strong><a href=\"https:\/\/hvtesttech.com\/af\/insulation-resistance-testers\/\" target=\"_blank\" rel=\"noreferrer noopener\">HVTestTech<\/a><\/strong>, we supply&nbsp;<strong>IEC 61557-compliant insulation testers<\/strong>&nbsp;trusted by industries worldwide. Below, we break down the standard\u2019s critical requirements and how to ensure your tools meet them.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>Key IEC 61557-2 Requirements for Insulation Testers<\/strong><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">To comply with IEC 61557-2, insulation resistance testers must meet strict criteria:<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th><strong>Requirement<\/strong><\/th><th><strong>Details<\/strong><\/th><\/tr><\/thead><tbody><tr><td><strong>Test Voltage Accuracy<\/strong><\/td><td>\u00b15% of the nominal voltage (e.g., 500V \u00b125V).<\/td><\/tr><tr><td><strong>Resistance Range<\/strong><\/td><td>Minimum 0.1 M\u03a9 to 10 G\u03a9, with \u00b15% measurement accuracy.<\/td><\/tr><tr><td><strong>Safety Ratings<\/strong><\/td><td>CAT III 300V or higher for most industrial applications.<\/td><\/tr><tr><td><strong>Auto-Discharge Function<\/strong><\/td><td>Must safely discharge capacitive loads after testing.<\/td><\/tr><tr><td><strong>Environmental Durability<\/strong><\/td><td>Operate within -25\u00b0C to +55\u00b0C and 85% relative humidity (non-condensing).<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Non-compliance risks<\/strong>: Invalid test results, failed audits, and liability for accidents.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>How to Perform IEC 61557-Compliant Insulation Testing<\/strong><\/h3>\n\n\n\n<h4 class=\"wp-block-heading\"><strong>Step 1: Select a Certified Tester<\/strong><\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">Use tools validated for IEC 61557-2, such as:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Fluke 1587FC<\/strong>\u00a0(CAT IV 600V, \u00b13% accuracy).<\/li>\n\n\n\n<li><strong>Megger MIT1025<\/strong>\u00a0(10 kV range, IP65-rated).<\/li>\n\n\n\n<li><strong>HVTestTech ProSeries HT-100<\/strong>\u00a0(IEC 61557-2 certified, budget-friendly).<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong><a href=\"https:\/\/hvtesttech.com\/af\/insulation-resistance-testers\/\" target=\"_blank\" rel=\"noreferrer noopener\">Shop Certified Testers<\/a><\/strong><\/p>\n\n\n\n<h4 class=\"wp-block-heading\"><strong>Step 2: Configure Test Parameters<\/strong><\/h4>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Voltage<\/strong>: Match the system\u2019s rated voltage (e.g., 500V for 400V equipment).<\/li>\n\n\n\n<li><strong>Duration<\/strong>: Minimum 1 minute for spot tests; 10+ minutes for Polarization Index (PI).<\/li>\n<\/ul>\n\n\n\n<h4 class=\"wp-block-heading\"><strong>Step 3: Document Results<\/strong><\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">Record:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Test voltage, duration, and temperature.<\/li>\n\n\n\n<li>Measured resistance (M\u03a9 or G\u03a9).<\/li>\n\n\n\n<li>Pass\/fail status against IEC 60364 benchmarks.<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Pro Tip<\/strong>: Testers like the&nbsp;<strong>Hioki IR4056-21<\/strong>&nbsp;auto-generate reports with timestamps.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>Common Pitfalls to Avoid<\/strong><\/h3>\n\n\n\n<ol start=\"1\" class=\"wp-block-list\">\n<li><strong>Ignoring Calibration<\/strong>: IEC 61557 requires annual recalibration. Use\u00a0<strong><a href=\"https:\/\/hvtesttech.com\/af\/insulation-resistance-testers\/\" target=\"_blank\" rel=\"noreferrer noopener\">HVTestTech\u2019s NIST-traceable service<\/a><\/strong>.<\/li>\n\n\n\n<li><strong>Using Non-CAT-Rated Tools<\/strong>: CAT III\/CAT IV ratings are mandatory for industrial zones.<\/li>\n\n\n\n<li><strong>Testing Live Equipment<\/strong>: Always de-energize systems first. Tools like the\u00a0<strong>KYORITSU KEW3125A<\/strong>\u00a0detect live circuits automatically.<\/li>\n<\/ol>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>Top 3 IEC 61557-Compliant Testers for 2024<\/strong><\/h3>\n\n\n\n<h4 class=\"wp-block-heading\"><strong>1. Megger MIT310<\/strong><\/h4>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Compliance<\/strong>: IEC 61557-2, CAT IV 600V.<\/li>\n\n\n\n<li><strong>Features<\/strong>: 2500V test range, Bluetooth reporting.<\/li>\n\n\n\n<li><strong>Best For<\/strong>: High-voltage industrial systems.<\/li>\n<\/ul>\n\n\n\n<h4 class=\"wp-block-heading\"><strong>2. Fluke 1507<\/strong><\/h4>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Compliance<\/strong>: IEC 61557-2, CAT III 1000V.<\/li>\n\n\n\n<li><strong>Features<\/strong>: 3-button simplicity, rugged design.<\/li>\n\n\n\n<li><strong>Best For<\/strong>: Routine maintenance in commercial facilities.<\/li>\n<\/ul>\n\n\n\n<h4 class=\"wp-block-heading\"><strong>3. HVTestTech ProSeries HT-100<\/strong><\/h4>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Compliance<\/strong>: IEC 61557-2, CAT III 600V.<\/li>\n\n\n\n<li><strong>Features<\/strong>: Auto-discharge, lifetime calibration plan.<\/li>\n\n\n\n<li><strong>Best For<\/strong>: Budget-conscious teams needing certified accuracy.<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong><a href=\"https:\/\/hvtesttech.com\/af\/insulation-resistance-testers\/\" target=\"_blank\" rel=\"noreferrer noopener\">Compare All Compliant Testers<\/a><\/strong><\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>Why IEC 61557 Matters Beyond Compliance<\/strong><\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Safety<\/strong>: Prevents arc flashes, shocks, and fires caused by insulation failure.<\/li>\n\n\n\n<li><strong>Cost Savings<\/strong>: Reduces unplanned downtime and equipment replacement.<\/li>\n\n\n\n<li><strong>Reputation<\/strong>: Demonstrates commitment to quality in audits and client contracts.<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>FAQs<\/strong><\/h3>\n\n\n\n<div class=\"schema-faq wp-block-yoast-faq-block\"><div class=\"schema-faq-section\" id=\"faq-question-1744282874778\"><strong class=\"schema-faq-question\"><strong>Q: Does IEC 61557 apply to solar panel testing?<\/strong><\/strong> <p class=\"schema-faq-answer\">A: Yes! Use CAT III-rated testers like the\u00a0<strong>Hioki IR4056-21<\/strong>\u00a0for PV systems.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1744282888164\"><strong class=\"schema-faq-question\"><strong>Q: Can I use a multimeter instead of an IEC 61557-compliant tester?<\/strong><\/strong> <p class=\"schema-faq-answer\">A: No\u2014multimeters lack the required voltage output and accuracy.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1744282903421\"><strong class=\"schema-faq-question\"><strong>Q: How do I verify my tester\u2019s compliance?<\/strong><\/strong> <p class=\"schema-faq-answer\">A: Check for the IEC 61557-2 mark on the device or manual.\u00a0<strong><a href=\"https:\/\/hvtesttech.com\/af\/insulation-resistance-testers\/\" target=\"_blank\" rel=\"noreferrer noopener\">HVTestTech\u2019s testers<\/a><\/strong>\u00a0include certification documents.<\/p> <\/div> <\/div>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>Why Choose HVTestTech for Compliant Testing?<\/strong><\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Guaranteed Compliance<\/strong>: Every tester meets IEC 61557-2 requirements.<\/li>\n\n\n\n<li><strong>Free Training<\/strong>: Access our\u00a0<strong>IEC Standards Webinar Series<\/strong>\u00a0with purchase.<\/li>\n\n\n\n<li><strong>Global Support<\/strong>: 24\/7 assistance for troubleshooting and audits.<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong><a href=\"https:\/\/hvtesttech.com\/af\/insulation-resistance-testers\/\" target=\"_blank\" rel=\"noreferrer noopener\">Upgrade to Certified Testers Now<\/a><\/strong><\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>Final Thoughts<\/strong><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">IEC 61557 isn\u2019t just a regulatory hurdle\u2014it\u2019s a blueprint for safer, more reliable electrical systems. By pairing certified insulation resistance testers with disciplined testing practices, you protect lives, assets, and your organization\u2019s bottom line.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">At&nbsp;<strong><a href=\"https:\/\/hvtesttech.com\/af\/insulation-resistance-testers\/\" target=\"_blank\" rel=\"noreferrer noopener\">HVTestTech<\/a><\/strong>, we\u2019re committed to helping you meet and exceed global standards. Explore our range of IEC 61557-compliant tools today and test with confidence.<\/p>","protected":false},"excerpt":{"rendered":"<p>What is IEC 61557? The&nbsp;IEC 61557&nbsp;series is the global benchmark for electrical safety testing, governing equipment used to verify insulation resistance, ground continuity, and loop impedance in low-voltage systems. Specifically,&nbsp;IEC 61557-2&nbsp;defines the requirements for insulation resistance testers, ensuring they deliver accurate, repeatable results for compliance with standards like&nbsp;IEC 60364&nbsp;(electrical installations) and&nbsp;NFPA 70E&nbsp;(workplace safety). For engineers, [&hellip;]<\/p>","protected":false},"author":1,"featured_media":2788,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"om_disable_all_campaigns":false,"_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"footnotes":""},"categories":[23],"tags":[],"class_list":["post-4472","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-insulation-resistance-testing"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v25.0 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Insulation Resistance Testing Standards: Understanding IEC 61557 Compliance in 2024 - HVTestTech \u2013 High Voltage Testing Equipment Experts<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/hvtesttech.com\/af\/insulation-resistance-testing-standards-understanding-iec-61557-compliance-in-2024\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Insulation Resistance Testing Standards: Understanding IEC 61557 Compliance in 2024 - HVTestTech \u2013 High Voltage Testing Equipment Experts\" \/>\n<meta property=\"og:description\" content=\"What is IEC 61557? The&nbsp;IEC 61557&nbsp;series is the global benchmark for electrical safety testing, governing equipment used to verify insulation resistance, ground continuity, and loop impedance in low-voltage systems. Specifically,&nbsp;IEC 61557-2&nbsp;defines the requirements for insulation resistance testers, ensuring they deliver accurate, repeatable results for compliance with standards like&nbsp;IEC 60364&nbsp;(electrical installations) and&nbsp;NFPA 70E&nbsp;(workplace safety). 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I specialize in using advanced testing equipment to maintain and improve electrical infrastructure. As a leader and mentor, I guide my team through complex power projects, always prioritizing safety and efficiency. My innovative approach and commitment to team development have earned me respect in the engineering community, establishing me as a trusted authority in electrical testing and power system reliability.\",\"sameAs\":[\"https:\/\/hvtesttech.com\"],\"url\":\"https:\/\/hvtesttech.com\/af\/author\/salehvtesttech-com\/\"},{\"@type\":\"Question\",\"@id\":\"https:\/\/hvtesttech.com\/insulation-resistance-testing-standards-understanding-iec-61557-compliance-in-2024\/#faq-question-1744282874778\",\"position\":1,\"url\":\"https:\/\/hvtesttech.com\/insulation-resistance-testing-standards-understanding-iec-61557-compliance-in-2024\/#faq-question-1744282874778\",\"name\":\"Q: Does IEC 61557 apply to solar panel testing?\",\"answerCount\":1,\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"A: Yes! Use CAT III-rated testers like the\u00a0<strong>Hioki IR4056-21<\/strong>\u00a0for PV systems.\",\"inLanguage\":\"af-ZA\"},\"inLanguage\":\"af-ZA\"},{\"@type\":\"Question\",\"@id\":\"https:\/\/hvtesttech.com\/insulation-resistance-testing-standards-understanding-iec-61557-compliance-in-2024\/#faq-question-1744282888164\",\"position\":2,\"url\":\"https:\/\/hvtesttech.com\/insulation-resistance-testing-standards-understanding-iec-61557-compliance-in-2024\/#faq-question-1744282888164\",\"name\":\"Q: Can I use a multimeter instead of an IEC 61557-compliant tester?\",\"answerCount\":1,\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"A: No\u2014multimeters lack the required voltage output and accuracy.\",\"inLanguage\":\"af-ZA\"},\"inLanguage\":\"af-ZA\"},{\"@type\":\"Question\",\"@id\":\"https:\/\/hvtesttech.com\/insulation-resistance-testing-standards-understanding-iec-61557-compliance-in-2024\/#faq-question-1744282903421\",\"position\":3,\"url\":\"https:\/\/hvtesttech.com\/insulation-resistance-testing-standards-understanding-iec-61557-compliance-in-2024\/#faq-question-1744282903421\",\"name\":\"Q: How do I verify my tester\u2019s compliance?\",\"answerCount\":1,\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"A: Check for the IEC 61557-2 mark on the device or manual.\u00a0<strong><a href=\\\"https:\/\/hvtesttech.com\/insulation-resistance-testers\/\\\" target=\\\"_blank\\\" rel=\\\"noreferrer noopener\\\">HVTestTech\u2019s testers<\/a><\/strong>\u00a0include certification documents.\",\"inLanguage\":\"af-ZA\"},\"inLanguage\":\"af-ZA\"}]}<\/script>\n<!-- \/ Yoast SEO plugin. -->","yoast_head_json":{"title":"Insulation Resistance Testing Standards: Understanding IEC 61557 Compliance in 2024 - HVTestTech \u2013 High Voltage Testing Equipment Experts","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/hvtesttech.com\/af\/insulation-resistance-testing-standards-understanding-iec-61557-compliance-in-2024\/","og_locale":"en_US","og_type":"article","og_title":"Insulation Resistance Testing Standards: Understanding IEC 61557 Compliance in 2024 - HVTestTech \u2013 High Voltage Testing Equipment Experts","og_description":"What is IEC 61557? The&nbsp;IEC 61557&nbsp;series is the global benchmark for electrical safety testing, governing equipment used to verify insulation resistance, ground continuity, and loop impedance in low-voltage systems. Specifically,&nbsp;IEC 61557-2&nbsp;defines the requirements for insulation resistance testers, ensuring they deliver accurate, repeatable results for compliance with standards like&nbsp;IEC 60364&nbsp;(electrical installations) and&nbsp;NFPA 70E&nbsp;(workplace safety). 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I specialize in using advanced testing equipment to maintain and improve electrical infrastructure. As a leader and mentor, I guide my team through complex power projects, always prioritizing safety and efficiency. My innovative approach and commitment to team development have earned me respect in the engineering community, establishing me as a trusted authority in electrical testing and power system reliability.","sameAs":["https:\/\/hvtesttech.com"],"url":"https:\/\/hvtesttech.com\/af\/author\/salehvtesttech-com\/"},{"@type":"Question","@id":"https:\/\/hvtesttech.com\/insulation-resistance-testing-standards-understanding-iec-61557-compliance-in-2024\/#faq-question-1744282874778","position":1,"url":"https:\/\/hvtesttech.com\/insulation-resistance-testing-standards-understanding-iec-61557-compliance-in-2024\/#faq-question-1744282874778","name":"Q: Does IEC 61557 apply to solar panel testing?","answerCount":1,"acceptedAnswer":{"@type":"Answer","text":"A: Yes! Use CAT III-rated testers like the\u00a0<strong>Hioki IR4056-21<\/strong>\u00a0for PV systems.","inLanguage":"af-ZA"},"inLanguage":"af-ZA"},{"@type":"Question","@id":"https:\/\/hvtesttech.com\/insulation-resistance-testing-standards-understanding-iec-61557-compliance-in-2024\/#faq-question-1744282888164","position":2,"url":"https:\/\/hvtesttech.com\/insulation-resistance-testing-standards-understanding-iec-61557-compliance-in-2024\/#faq-question-1744282888164","name":"Q: Can I use a multimeter instead of an IEC 61557-compliant tester?","answerCount":1,"acceptedAnswer":{"@type":"Answer","text":"A: No\u2014multimeters lack the required voltage output and accuracy.","inLanguage":"af-ZA"},"inLanguage":"af-ZA"},{"@type":"Question","@id":"https:\/\/hvtesttech.com\/insulation-resistance-testing-standards-understanding-iec-61557-compliance-in-2024\/#faq-question-1744282903421","position":3,"url":"https:\/\/hvtesttech.com\/insulation-resistance-testing-standards-understanding-iec-61557-compliance-in-2024\/#faq-question-1744282903421","name":"Q: How do I verify my tester\u2019s compliance?","answerCount":1,"acceptedAnswer":{"@type":"Answer","text":"A: Check for the IEC 61557-2 mark on the device or manual.\u00a0<strong><a href=\"https:\/\/hvtesttech.com\/insulation-resistance-testers\/\" target=\"_blank\" rel=\"noreferrer noopener\">HVTestTech\u2019s testers<\/a><\/strong>\u00a0include certification documents.","inLanguage":"af-ZA"},"inLanguage":"af-ZA"}]}},"_links":{"self":[{"href":"https:\/\/hvtesttech.com\/af\/wp-json\/wp\/v2\/posts\/4472","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/hvtesttech.com\/af\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/hvtesttech.com\/af\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/hvtesttech.com\/af\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/hvtesttech.com\/af\/wp-json\/wp\/v2\/comments?post=4472"}],"version-history":[{"count":1,"href":"https:\/\/hvtesttech.com\/af\/wp-json\/wp\/v2\/posts\/4472\/revisions"}],"predecessor-version":[{"id":4473,"href":"https:\/\/hvtesttech.com\/af\/wp-json\/wp\/v2\/posts\/4472\/revisions\/4473"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/hvtesttech.com\/af\/wp-json\/wp\/v2\/media\/2788"}],"wp:attachment":[{"href":"https:\/\/hvtesttech.com\/af\/wp-json\/wp\/v2\/media?parent=4472"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/hvtesttech.com\/af\/wp-json\/wp\/v2\/categories?post=4472"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/hvtesttech.com\/af\/wp-json\/wp\/v2\/tags?post=4472"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}