{"id":30462,"date":"2026-07-27T16:28:35","date_gmt":"2026-07-27T08:28:35","guid":{"rendered":"https:\/\/www.cnspd.com\/?p=30462"},"modified":"2026-07-27T16:59:50","modified_gmt":"2026-07-27T08:59:50","slug":"spd-coordination-guide-how-type-1-type-2-and-type-3-work-together","status":"publish","type":"post","link":"https:\/\/www.cnspd.com\/es\/spd-coordination-type-1-type-2-type-3\/","title":{"rendered":"SPD Coordination Guide: How Type 1, Type 2 and Type 3 Work Together"},"content":{"rendered":"\t\t<div data-elementor-type=\"wp-post\" data-elementor-id=\"30462\" class=\"elementor elementor-30462\" data-elementor-post-type=\"post\">\n\t\t\t\t<div class=\"elementor-element elementor-element-b861f49 e-flex e-con-boxed e-con e-parent\" data-id=\"b861f49\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-f315437 elementor-widget elementor-widget-html\" data-id=\"f315437\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"html.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<style>\r\n  #leeyee-spd-coordination-final {\r\n    --sc-blue: #004898;\r\n    --sc-blue-dark: #00376f;\r\n    --sc-blue-soft: #eef5ff;\r\n    --sc-blue-pale: #f7fbff;\r\n    --sc-heading: #172635;\r\n    --sc-text: #293846;\r\n    --sc-muted: #5e6d79;\r\n    --sc-border: #d7e1ea;\r\n    --sc-warning-bg: #fff8eb;\r\n    --sc-success: #176b43;\r\n    --sc-success-bg: #f1faf5;\r\n    width: 100%;\r\n    max-width: 840px;\r\n    margin: 0 auto;\r\n    padding: 6px 20px 58px;\r\n    color: var(--sc-text);\r\n    font-size: 16.5px;\r\n    line-height: 1.72;\r\n    overflow-wrap: break-word;\r\n    word-break: normal;\r\n  }\r\n\r\n  #leeyee-spd-coordination-final,\r\n  #leeyee-spd-coordination-final * {\r\n    box-sizing: border-box;\r\n  }\r\n\r\n  #leeyee-spd-coordination-final p {\r\n    margin: 0 0 18px;\r\n  }\r\n\r\n  #leeyee-spd-coordination-final ul,\r\n  #leeyee-spd-coordination-final ol {\r\n    margin: 0 0 21px;\r\n    padding-left: 23px;\r\n  }\r\n\r\n  #leeyee-spd-coordination-final li {\r\n    margin-bottom: 8px;\r\n  }\r\n\r\n  #leeyee-spd-coordination-final a {\r\n    color: var(--sc-blue);\r\n    text-decoration: underline;\r\n    text-decoration-thickness: 1px;\r\n    text-underline-offset: 3px;\r\n  }\r\n\r\n  #leeyee-spd-coordination-final a:hover {\r\n    color: var(--sc-blue-dark);\r\n  }\r\n\r\n  #leeyee-spd-coordination-final strong {\r\n    color: var(--sc-heading);\r\n  }\r\n\r\n  #leeyee-spd-coordination-final h2,\r\n  #leeyee-spd-coordination-final h3 {\r\n    color: var(--sc-heading);\r\n    line-height: 1.28;\r\n    letter-spacing: -0.015em;\r\n    overflow-wrap: normal;\r\n    word-break: normal;\r\n    scroll-margin-top: 90px;\r\n  }\r\n\r\n  #leeyee-spd-coordination-final h2 {\r\n    margin: 49px 0 18px;\r\n    padding-bottom: 10px;\r\n    border-bottom: 2px solid #e8eef4;\r\n    font-size: clamp(27px, 3.2vw, 32px);\r\n  }\r\n\r\n  #leeyee-spd-coordination-final h3 {\r\n    margin: 31px 0 12px;\r\n    font-size: clamp(21px, 2.5vw, 24px);\r\n  }\r\n\r\n  #leeyee-spd-coordination-final .sc-intro {\r\n    margin-bottom: 23px;\r\n    color: #314352;\r\n    font-size: 18px;\r\n    line-height: 1.68;\r\n  }\r\n\r\n  #leeyee-spd-coordination-final .sc-quick-answer {\r\n    margin: 23px 0 25px;\r\n    padding: 22px 24px;\r\n    border: 1px solid #c8dcf0;\r\n    border-left: 5px solid var(--sc-blue);\r\n    border-radius: 10px;\r\n    background: var(--sc-blue-pale);\r\n  }\r\n\r\n  #leeyee-spd-coordination-final .sc-label {\r\n    display: inline-block;\r\n    margin-bottom: 10px;\r\n    color: var(--sc-blue);\r\n    font-size: 13px;\r\n    font-weight: 800;\r\n    letter-spacing: 0.08em;\r\n    text-transform: uppercase;\r\n  }\r\n\r\n  #leeyee-spd-coordination-final .sc-quick-answer p:last-child,\r\n  #leeyee-spd-coordination-final .sc-note p:last-child,\r\n  #leeyee-spd-coordination-final .sc-warning p:last-child,\r\n  #leeyee-spd-coordination-final .sc-cta p:last-child,\r\n  #leeyee-spd-coordination-final .sc-example-result p:last-child {\r\n    margin-bottom: 0;\r\n  }\r\n\r\n  #leeyee-spd-coordination-final .sc-snapshot {\r\n    display: grid;\r\n    grid-template-columns: repeat(3, minmax(0, 1fr));\r\n    gap: 13px;\r\n    margin: 24px 0 29px;\r\n  }\r\n\r\n  #leeyee-spd-coordination-final .sc-snapshot-item {\r\n    padding: 17px 16px;\r\n    border: 1px solid var(--sc-border);\r\n    border-radius: 8px;\r\n    background: #fff;\r\n  }\r\n\r\n  #leeyee-spd-coordination-final .sc-snapshot-item strong {\r\n    display: block;\r\n    margin-bottom: 5px;\r\n    color: var(--sc-blue-dark);\r\n    font-size: 16px;\r\n  }\r\n\r\n  #leeyee-spd-coordination-final .sc-snapshot-item span {\r\n    display: block;\r\n    color: var(--sc-muted);\r\n    font-size: 14.5px;\r\n    line-height: 1.55;\r\n  }\r\n\r\n  #leeyee-spd-coordination-final .sc-contents {\r\n    margin: 27px 0 39px;\r\n    padding: 20px 22px;\r\n    border-top: 1px solid var(--sc-border);\r\n    border-bottom: 1px solid var(--sc-border);\r\n  }\r\n\r\n  #leeyee-spd-coordination-final .sc-contents h2 {\r\n    margin: 0 0 12px;\r\n    padding: 0;\r\n    border: 0;\r\n    font-size: 21px;\r\n  }\r\n\r\n  #leeyee-spd-coordination-final .sc-contents ol {\r\n    margin: 0;\r\n    columns: 2;\r\n    column-gap: 38px;\r\n  }\r\n\r\n  #leeyee-spd-coordination-final .sc-contents li {\r\n    break-inside: avoid;\r\n    margin-bottom: 7px;\r\n  }\r\n\r\n  #leeyee-spd-coordination-final .sc-contents a {\r\n    text-decoration: none;\r\n  }\r\n\r\n  #leeyee-spd-coordination-final .sc-figure {\r\n    margin: 28px 0 35px;\r\n  }\r\n\r\n  #leeyee-spd-coordination-final .sc-figure img {\r\n    display: block;\r\n    width: 100%;\r\n    height: auto;\r\n    aspect-ratio: 4 \/ 3;\r\n    object-fit: contain;\r\n    border: 1px solid var(--sc-border);\r\n    border-radius: 10px;\r\n    background: #fff;\r\n  }\r\n\r\n  #leeyee-spd-coordination-final .sc-figure figcaption {\r\n    max-width: 750px;\r\n    margin: 10px auto 0;\r\n    color: var(--sc-muted);\r\n    font-size: 14px;\r\n    line-height: 1.55;\r\n    text-align: center;\r\n  }\r\n\r\n  #leeyee-spd-coordination-final .sc-definition {\r\n    margin: 22px 0;\r\n    padding: 18px 20px;\r\n    border-left: 4px solid var(--sc-blue);\r\n    background: var(--sc-blue-soft);\r\n    font-size: 17px;\r\n  }\r\n\r\n  #leeyee-spd-coordination-final .sc-note,\r\n  #leeyee-spd-coordination-final .sc-warning {\r\n    margin: 24px 0;\r\n    padding: 19px 21px;\r\n    border-radius: 9px;\r\n  }\r\n\r\n  #leeyee-spd-coordination-final .sc-note {\r\n    border: 1px solid #cbddec;\r\n    background: var(--sc-blue-pale);\r\n  }\r\n\r\n  #leeyee-spd-coordination-final .sc-warning {\r\n    border: 1px solid #ecd09b;\r\n    border-left: 5px solid #c47600;\r\n    background: var(--sc-warning-bg);\r\n  }\r\n\r\n  #leeyee-spd-coordination-final .sc-grid {\r\n    display: grid;\r\n    grid-template-columns: repeat(2, minmax(0, 1fr));\r\n    gap: 16px;\r\n    margin: 23px 0 27px;\r\n  }\r\n\r\n  #leeyee-spd-coordination-final .sc-card {\r\n    padding: 19px 20px;\r\n    border: 1px solid var(--sc-border);\r\n    border-radius: 9px;\r\n    background: #fff;\r\n  }\r\n\r\n  #leeyee-spd-coordination-final .sc-card h3 {\r\n    margin: 0 0 10px;\r\n    font-size: 20px;\r\n  }\r\n\r\n  #leeyee-spd-coordination-final .sc-card ul {\r\n    margin-bottom: 0;\r\n  }\r\n\r\n  #leeyee-spd-coordination-final .sc-card-good {\r\n    border-top: 4px solid var(--sc-success);\r\n    background: var(--sc-success-bg);\r\n  }\r\n\r\n  #leeyee-spd-coordination-final .sc-card-risk {\r\n    border-top: 4px solid #c97800;\r\n    background: #fffaf2;\r\n  }\r\n\r\n  #leeyee-spd-coordination-final .sc-table-note {\r\n    margin: 0 0 10px;\r\n    color: var(--sc-muted);\r\n    font-size: 14.5px;\r\n  }\r\n\r\n  #leeyee-spd-coordination-final .sc-table-wrap {\r\n    margin: 21px 0 12px;\r\n  }\r\n\r\n  #leeyee-spd-coordination-final table {\r\n    width: 100%;\r\n    border-collapse: separate;\r\n    border-spacing: 0;\r\n    border: 1px solid var(--sc-border);\r\n    border-radius: 8px;\r\n    background: #fff;\r\n    overflow: hidden;\r\n  }\r\n\r\n  #leeyee-spd-coordination-final th,\r\n  #leeyee-spd-coordination-final td {\r\n    padding: 13px 14px;\r\n    border-right: 1px solid var(--sc-border);\r\n    border-bottom: 1px solid var(--sc-border);\r\n    text-align: left;\r\n    vertical-align: top;\r\n    line-height: 1.48;\r\n    overflow-wrap: break-word;\r\n    word-break: normal;\r\n    hyphens: manual;\r\n  }\r\n\r\n  #leeyee-spd-coordination-final th {\r\n    background: var(--sc-blue);\r\n    color: #fff;\r\n    font-size: 14px;\r\n    font-weight: 750;\r\n  }\r\n\r\n  #leeyee-spd-coordination-final tr:last-child td {\r\n    border-bottom: 0;\r\n  }\r\n\r\n  #leeyee-spd-coordination-final th:last-child,\r\n  #leeyee-spd-coordination-final td:last-child {\r\n    border-right: 0;\r\n  }\r\n\r\n  #leeyee-spd-coordination-final .sc-stage-table col:nth-child(1) {\r\n    width: 15%;\r\n  }\r\n\r\n  #leeyee-spd-coordination-final .sc-stage-table col:nth-child(2) {\r\n    width: 31%;\r\n  }\r\n\r\n  #leeyee-spd-coordination-final .sc-stage-table col:nth-child(3) {\r\n    width: 25%;\r\n  }\r\n\r\n  #leeyee-spd-coordination-final .sc-stage-table col:nth-child(4) {\r\n    width: 29%;\r\n  }\r\n\r\n  #leeyee-spd-coordination-final .sc-stage-table th:first-child,\r\n  #leeyee-spd-coordination-final .sc-stage-table td:first-child {\r\n    min-width: 108px;\r\n  }\r\n\r\n  #leeyee-spd-coordination-final .sc-stage-table td:first-child strong {\r\n    white-space: nowrap;\r\n  }\r\n\r\n  #leeyee-spd-coordination-final .sc-table-conclusion {\r\n    margin: 10px 0 25px;\r\n    color: #3d4d5a;\r\n    font-weight: 650;\r\n  }\r\n\r\n  #leeyee-spd-coordination-final .sc-ref {\r\n    color: var(--sc-blue);\r\n    font-size: 0.78em;\r\n    font-weight: 750;\r\n    text-decoration: none;\r\n    vertical-align: super;\r\n  }\r\n\r\n  #leeyee-spd-coordination-final .sc-steps {\r\n    margin: 24px 0;\r\n    padding: 0;\r\n    list-style: none;\r\n    counter-reset: sc-step;\r\n  }\r\n\r\n  #leeyee-spd-coordination-final .sc-steps > li {\r\n    position: relative;\r\n    margin: 0 0 18px;\r\n    padding: 0 0 18px 53px;\r\n    border-bottom: 1px solid #e7edf2;\r\n    counter-increment: sc-step;\r\n  }\r\n\r\n  #leeyee-spd-coordination-final .sc-steps > li::before {\r\n    content: counter(sc-step);\r\n    position: absolute;\r\n    top: 1px;\r\n    left: 0;\r\n    display: flex;\r\n    width: 35px;\r\n    height: 35px;\r\n    align-items: center;\r\n    justify-content: center;\r\n    border-radius: 50%;\r\n    background: var(--sc-blue);\r\n    color: #fff;\r\n    font-size: 15px;\r\n    font-weight: 800;\r\n  }\r\n\r\n  #leeyee-spd-coordination-final .sc-steps > li:last-child {\r\n    border-bottom: 0;\r\n  }\r\n\r\n  #leeyee-spd-coordination-final .sc-steps strong {\r\n    display: block;\r\n    margin-bottom: 5px;\r\n    font-size: 18px;\r\n  }\r\n\r\n  #leeyee-spd-coordination-final .sc-example {\r\n    margin: 24px 0;\r\n    padding: 22px;\r\n    border: 1px solid var(--sc-border);\r\n    border-radius: 10px;\r\n    background: #fff;\r\n  }\r\n\r\n  #leeyee-spd-coordination-final .sc-example h3 {\r\n    margin-top: 0;\r\n  }\r\n\r\n  #leeyee-spd-coordination-final .sc-route {\r\n    display: grid;\r\n    grid-template-columns: 1fr auto 1fr auto 1fr;\r\n    gap: 10px;\r\n    align-items: stretch;\r\n    margin: 20px 0 23px;\r\n  }\r\n\r\n  #leeyee-spd-coordination-final .sc-route-stage {\r\n    padding: 16px 13px;\r\n    border: 1px solid #cbddec;\r\n    border-radius: 8px;\r\n    background: var(--sc-blue-pale);\r\n    text-align: center;\r\n  }\r\n\r\n  #leeyee-spd-coordination-final .sc-route-stage strong {\r\n    display: block;\r\n    margin-bottom: 5px;\r\n    color: var(--sc-blue-dark);\r\n  }\r\n\r\n  #leeyee-spd-coordination-final .sc-route-stage span {\r\n    display: block;\r\n    color: var(--sc-muted);\r\n    font-size: 14px;\r\n    line-height: 1.5;\r\n  }\r\n\r\n  #leeyee-spd-coordination-final .sc-route-arrow {\r\n    display: flex;\r\n    align-items: center;\r\n    justify-content: center;\r\n    color: var(--sc-blue);\r\n    font-size: 23px;\r\n    font-weight: 800;\r\n  }\r\n\r\n  #leeyee-spd-coordination-final .sc-example-result {\r\n    padding: 17px 19px;\r\n    border-left: 4px solid var(--sc-success);\r\n    background: var(--sc-success-bg);\r\n  }\r\n\r\n  #leeyee-spd-coordination-final .sc-status {\r\n    display: inline-block;\r\n    padding: 3px 8px;\r\n    border-radius: 999px;\r\n    font-size: 12.5px;\r\n    font-weight: 800;\r\n    line-height: 1.35;\r\n    white-space: nowrap;\r\n  }\r\n\r\n  #leeyee-spd-coordination-final .sc-status-confirm {\r\n    background: #fff1d6;\r\n    color: #895000;\r\n  }\r\n\r\n  #leeyee-spd-coordination-final .sc-status-document {\r\n    background: #e7f2ff;\r\n    color: #00437d;\r\n  }\r\n\r\n  #leeyee-spd-coordination-final .sc-status-project {\r\n    background: #f0eefe;\r\n    color: #5143a6;\r\n  }\r\n\r\n  #leeyee-spd-coordination-final .sc-checklist {\r\n    margin: 23px 0;\r\n    padding: 21px 23px;\r\n    border: 1px solid #cbddec;\r\n    border-radius: 9px;\r\n    background: var(--sc-blue-pale);\r\n  }\r\n\r\n  #leeyee-spd-coordination-final .sc-checklist h3 {\r\n    margin-top: 0;\r\n  }\r\n\r\n  #leeyee-spd-coordination-final .sc-checklist ul {\r\n    display: grid;\r\n    grid-template-columns: repeat(2, minmax(0, 1fr));\r\n    column-gap: 30px;\r\n    margin-bottom: 0;\r\n  }\r\n\r\n  #leeyee-spd-coordination-final .sc-cta {\r\n    margin: 31px 0;\r\n    padding: 23px 24px;\r\n    border: 1px solid #c8ddf0;\r\n    border-radius: 10px;\r\n    background: var(--sc-blue-pale);\r\n  }\r\n\r\n  #leeyee-spd-coordination-final .sc-cta h2 {\r\n    margin: 0 0 10px;\r\n    padding: 0;\r\n    border: 0;\r\n    font-size: 25px;\r\n  }\r\n\r\n  #leeyee-spd-coordination-final .sc-cta .leeyee-site-popup-btn {\r\n    margin-top: 4px;\r\n  }\r\n\r\n  #leeyee-spd-coordination-final .sc-faq {\r\n    margin-top: 22px;\r\n    border-top: 1px solid var(--sc-border);\r\n  }\r\n\r\n  #leeyee-spd-coordination-final .sc-faq details {\r\n    border-bottom: 1px solid var(--sc-border);\r\n  }\r\n\r\n  #leeyee-spd-coordination-final .sc-faq summary {\r\n    position: relative;\r\n    padding: 17px 35px 17px 0;\r\n    color: var(--sc-heading);\r\n    font-weight: 750;\r\n    line-height: 1.45;\r\n    cursor: pointer;\r\n    list-style: none;\r\n  }\r\n\r\n  #leeyee-spd-coordination-final .sc-faq summary::-webkit-details-marker {\r\n    display: none;\r\n  }\r\n\r\n  #leeyee-spd-coordination-final .sc-faq summary::after {\r\n    content: \"+\";\r\n    position: absolute;\r\n    top: 14px;\r\n    right: 2px;\r\n    color: var(--sc-blue);\r\n    font-size: 24px;\r\n    font-weight: 500;\r\n  }\r\n\r\n  #leeyee-spd-coordination-final .sc-faq details[open] summary::after {\r\n    content: \"\u2212\";\r\n  }\r\n\r\n  #leeyee-spd-coordination-final .sc-faq-answer {\r\n    padding: 0 30px 17px 0;\r\n  }\r\n\r\n  #leeyee-spd-coordination-final .sc-related {\r\n    margin: 26px 0;\r\n    padding: 19px 21px;\r\n    border-top: 1px solid var(--sc-border);\r\n    border-bottom: 1px solid var(--sc-border);\r\n  }\r\n\r\n  #leeyee-spd-coordination-final .sc-related h3 {\r\n    margin-top: 0;\r\n  }\r\n\r\n  #leeyee-spd-coordination-final .sc-related ul {\r\n    margin-bottom: 0;\r\n  }\r\n\r\n  #leeyee-spd-coordination-final .sc-references {\r\n    padding-left: 20px;\r\n    color: var(--sc-muted);\r\n    font-size: 14px;\r\n    line-height: 1.6;\r\n  }\r\n\r\n  #leeyee-spd-coordination-final .sc-references li {\r\n    margin-bottom: 11px;\r\n  }\r\n\r\n  #leeyee-spd-coordination-final .sc-disclaimer {\r\n    margin-top: 25px;\r\n    padding-top: 17px;\r\n    border-top: 1px solid var(--sc-border);\r\n    color: var(--sc-muted);\r\n    font-size: 14px;\r\n  }\r\n\r\n  @media (max-width: 760px) {\r\n    #leeyee-spd-coordination-final {\r\n      padding-right: 16px;\r\n      padding-left: 16px;\r\n      font-size: 16px;\r\n    }\r\n\r\n    #leeyee-spd-coordination-final .sc-intro {\r\n      font-size: 17px;\r\n    }\r\n\r\n    #leeyee-spd-coordination-final .sc-snapshot,\r\n    #leeyee-spd-coordination-final .sc-grid,\r\n    #leeyee-spd-coordination-final .sc-checklist ul {\r\n      grid-template-columns: 1fr;\r\n    }\r\n\r\n    #leeyee-spd-coordination-final .sc-contents ol {\r\n      columns: 1;\r\n    }\r\n\r\n    #leeyee-spd-coordination-final .sc-route {\r\n      grid-template-columns: 1fr;\r\n    }\r\n\r\n    #leeyee-spd-coordination-final .sc-route-arrow {\r\n      min-height: 24px;\r\n      transform: rotate(90deg);\r\n    }\r\n\r\n    #leeyee-spd-coordination-final table,\r\n    #leeyee-spd-coordination-final thead,\r\n    #leeyee-spd-coordination-final tbody,\r\n    #leeyee-spd-coordination-final th,\r\n    #leeyee-spd-coordination-final td,\r\n    #leeyee-spd-coordination-final tr {\r\n      display: block;\r\n      width: 100%;\r\n    }\r\n\r\n    #leeyee-spd-coordination-final thead {\r\n      position: absolute;\r\n      width: 1px;\r\n      height: 1px;\r\n      overflow: hidden;\r\n      clip: rect(0 0 0 0);\r\n      white-space: nowrap;\r\n    }\r\n\r\n    #leeyee-spd-coordination-final table {\r\n      border: 0;\r\n      background: transparent;\r\n    }\r\n\r\n    #leeyee-spd-coordination-final tbody tr {\r\n      margin-bottom: 14px;\r\n      border: 1px solid var(--sc-border);\r\n      border-radius: 8px;\r\n      background: #fff;\r\n      overflow: hidden;\r\n    }\r\n\r\n    #leeyee-spd-coordination-final tbody td {\r\n      display: grid;\r\n      grid-template-columns: minmax(118px, 38%) minmax(0, 62%);\r\n      gap: 12px;\r\n      padding: 11px 13px;\r\n      border-right: 0;\r\n      border-bottom: 1px solid var(--sc-border);\r\n    }\r\n\r\n    #leeyee-spd-coordination-final tbody td::before {\r\n      content: attr(data-label);\r\n      color: var(--sc-blue-dark);\r\n      font-size: 13px;\r\n      font-weight: 800;\r\n      line-height: 1.4;\r\n      overflow-wrap: normal;\r\n      word-break: normal;\r\n    }\r\n\r\n    #leeyee-spd-coordination-final tbody tr td:last-child {\r\n      border-bottom: 0;\r\n    }\r\n\r\n    #leeyee-spd-coordination-final .sc-stage-table td:first-child strong {\r\n      white-space: normal;\r\n    }\r\n  }\r\n\r\n  @media (max-width: 430px) {\r\n    #leeyee-spd-coordination-final {\r\n      padding-right: 13px;\r\n      padding-left: 13px;\r\n    }\r\n\r\n    #leeyee-spd-coordination-final .sc-quick-answer,\r\n    #leeyee-spd-coordination-final .sc-note,\r\n    #leeyee-spd-coordination-final .sc-warning,\r\n    #leeyee-spd-coordination-final .sc-checklist,\r\n    #leeyee-spd-coordination-final .sc-cta,\r\n    #leeyee-spd-coordination-final .sc-example {\r\n      padding: 18px;\r\n    }\r\n\r\n    #leeyee-spd-coordination-final tbody td {\r\n      display: block;\r\n    }\r\n\r\n    #leeyee-spd-coordination-final tbody td::before {\r\n      display: block;\r\n      margin-bottom: 4px;\r\n    }\r\n\r\n    #leeyee-spd-coordination-final .sc-steps > li {\r\n      padding-left: 47px;\r\n    }\r\n\r\n    #leeyee-spd-coordination-final .sc-status {\r\n      white-space: normal;\r\n    }\r\n  }\r\n<\/style>\r\n\r\n<article id=\"leeyee-spd-coordination-final\">\r\n  <p class=\"sc-intro\">\r\n    Type 1, Type 2 and Type 3 are not three quality grades. They describe different SPD test duties and installation roles. A coordinated surge protection system must decide where each stage belongs, how the stages share surge energy and whether the voltage reaching the final equipment is low enough.\r\n  <\/p>\r\n\r\n  <section class=\"sc-quick-answer\" id=\"quick-answer\">\r\n    <span class=\"sc-label\">Quick Answer<\/span>\r\n    <p>\r\n      <strong>One SPD can be enough for a compact, low-exposure installation, but one device should not be assumed to protect an entire building or project.<\/strong>\r\n    <\/p>\r\n    <p>\r\n      Where partial lightning current may enter the electrical installation, a Type 1 or Type 1+2 SPD is normally evaluated at the origin. Type 2 SPDs are used at main or downstream distribution points to limit residual lightning-induced and switching surges. Type 3 or Type 2+3 protection is considered close to sensitive equipment when the upstream stage cannot maintain a sufficiently low protective level at the load.\r\n      <a class=\"sc-ref\" href=\"#ref-1\">[1]<\/a>\r\n      <a class=\"sc-ref\" href=\"#ref-3\">[3]<\/a>\r\n      <a class=\"sc-ref\" href=\"#ref-4\">[4]<\/a>\r\n      <a class=\"sc-ref\" href=\"#ref-5\">[5]<\/a>\r\n    <\/p>\r\n    <p>\r\n      The correct configuration may therefore be Type 2 only, one Type 1+2 combined SPD, separate Type 1 and Type 2 stages, or a complete Type 1\u2013Type 2\u2013Type 3 protection chain. The final choice depends on the project architecture, equipment withstand level, conductor routes and manufacturer coordination data.\r\n    <\/p>\r\n  <\/section>\r\n\r\n  <div class=\"sc-snapshot\" aria-label=\"SPD coordination summary\">\r\n    <div class=\"sc-snapshot-item\">\r\n      <strong>Installation origin<\/strong>\r\n      <span>Manage the highest surge duty that may enter the electrical system.<\/span>\r\n    <\/div>\r\n    <div class=\"sc-snapshot-item\">\r\n      <strong>Distribution level<\/strong>\r\n      <span>Reduce residual and locally generated transient overvoltages.<\/span>\r\n    <\/div>\r\n    <div class=\"sc-snapshot-item\">\r\n      <strong>Equipment level<\/strong>\r\n      <span>Keep the voltage at sensitive loads within an acceptable withstand level.<\/span>\r\n    <\/div>\r\n  <\/div>\r\n\r\n  <div class=\"sc-contents\">\r\n    <div id=\"ez-toc-container\" class=\"ez-toc-v2_0_85 counter-hierarchy ez-toc-counter ez-toc-custom ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title\" style=\"cursor:inherit\">Table of Contents<\/p>\n<span class=\"ez-toc-title-toggle\"><\/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=\"#\" data-href=\"https:\/\/www.cnspd.com\/es\/spd-coordination-type-1-type-2-type-3\/#in-this-guide\" >In This Guide<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"#\" data-href=\"https:\/\/www.cnspd.com\/es\/spd-coordination-type-1-type-2-type-3\/#what-does-spd-coordination-actually-mean\" >What Does SPD Coordination Actually Mean?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"#\" data-href=\"https:\/\/www.cnspd.com\/es\/spd-coordination-type-1-type-2-type-3\/#spd-coordination-includes-three-different-checks\" >SPD Coordination Includes Three Different Checks<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"#\" data-href=\"https:\/\/www.cnspd.com\/es\/spd-coordination-type-1-type-2-type-3\/#is-one-spd-enough-for-the-whole-installation\" >Is One SPD Enough for the Whole Installation?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"#\" data-href=\"https:\/\/www.cnspd.com\/es\/spd-coordination-type-1-type-2-type-3\/#where-do-type-1-type-2-and-type-3-spds-fit\" >Where Do Type 1, Type 2 and Type 3 SPDs Fit?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"#\" data-href=\"https:\/\/www.cnspd.com\/es\/spd-coordination-type-1-type-2-type-3\/#how-to-design-coordinated-surge-protection\" >How to Design Coordinated Surge Protection<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"#\" data-href=\"https:\/\/www.cnspd.com\/es\/spd-coordination-type-1-type-2-type-3\/#when-do-type-1-and-type-2-spds-work-together\" >When Do Type 1 and Type 2 SPDs Work Together?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"#\" data-href=\"https:\/\/www.cnspd.com\/es\/spd-coordination-type-1-type-2-type-3\/#does-sensitive-equipment-need-a-type-3-spd\" >Does Sensitive Equipment Need a Type 3 SPD?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-9\" href=\"#\" data-href=\"https:\/\/www.cnspd.com\/es\/spd-coordination-type-1-type-2-type-3\/#spd-distance-and-energy-coordination\" >SPD Distance and Energy Coordination<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-10\" href=\"#\" data-href=\"https:\/\/www.cnspd.com\/es\/spd-coordination-type-1-type-2-type-3\/#combined-spd-or-separate-protection-stages\" >Combined SPD or Separate Protection Stages?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-11\" href=\"#\" data-href=\"https:\/\/www.cnspd.com\/es\/spd-coordination-type-1-type-2-type-3\/#worked-example-main-board-machine-panel-and-plc-cabinet\" >Worked Example: Main Board, Machine Panel and PLC Cabinet<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-12\" href=\"#\" data-href=\"https:\/\/www.cnspd.com\/es\/spd-coordination-type-1-type-2-type-3\/#how-to-judge-spd-coordination-in-different-projects\" >How to Judge SPD Coordination in Different Projects<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-13\" href=\"#\" data-href=\"https:\/\/www.cnspd.com\/es\/spd-coordination-type-1-type-2-type-3\/#how-to-approve-the-actual-spd-model-combination\" >How to Approve the Actual SPD Model Combination<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-14\" href=\"#\" data-href=\"https:\/\/www.cnspd.com\/es\/spd-coordination-type-1-type-2-type-3\/#what-buyers-should-confirm-before-ordering\" >What Buyers Should Confirm Before Ordering<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-15\" href=\"#\" data-href=\"https:\/\/www.cnspd.com\/es\/spd-coordination-type-1-type-2-type-3\/#confirm-the-complete-spd-configuration\" >Confirm the Complete SPD Configuration<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-16\" href=\"#\" data-href=\"https:\/\/www.cnspd.com\/es\/spd-coordination-type-1-type-2-type-3\/#common-spd-coordination-mistakes\" >Common SPD Coordination Mistakes<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-17\" href=\"#\" data-href=\"https:\/\/www.cnspd.com\/es\/spd-coordination-type-1-type-2-type-3\/#spd-coordination-faq\" >SPD Coordination FAQ<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-18\" href=\"#\" data-href=\"https:\/\/www.cnspd.com\/es\/spd-coordination-type-1-type-2-type-3\/#references\" >References<\/a><\/li><\/ul><\/nav><\/div>\n<h2><span class=\"ez-toc-section\" id=\"in-this-guide\"><\/span>In This Guide<span class=\"ez-toc-section-end\"><\/span><\/h2>\r\n    <ol>\r\n      <li><a href=\"#coordination-meaning\">What SPD coordination means<\/a><\/li>\r\n      <li><a href=\"#three-coordination-checks\">Three checks that must not be confused<\/a><\/li>\r\n      <li><a href=\"#one-spd-enough\">When one SPD may be enough<\/a><\/li>\r\n      <li><a href=\"#protection-levels\">Where Type 1, Type 2 and Type 3 fit<\/a><\/li>\r\n      <li><a href=\"#selection-process\">How to design the protection stages<\/a><\/li>\r\n      <li><a href=\"#type-1-type-2\">When Type 1 and Type 2 work together<\/a><\/li>\r\n      <li><a href=\"#type-3-protection\">When equipment needs Type 3<\/a><\/li>\r\n      <li><a href=\"#distance-coordination\">Distance and energy coordination<\/a><\/li>\r\n      <li><a href=\"#combined-or-separate\">Combined versus separate SPDs<\/a><\/li>\r\n      <li><a href=\"#worked-example\">Worked engineering example<\/a><\/li>\r\n      <li><a href=\"#application-examples\">Data centre, industrial, PV, EV and BESS applications<\/a><\/li>\r\n      <li><a href=\"#model-approval\">Model-level coordination approval<\/a><\/li>\r\n      <li><a href=\"#ordering-checklist\">Procurement and OEM checklist<\/a><\/li>\r\n      <li><a href=\"#common-mistakes\">Common coordination mistakes<\/a><\/li>\r\n      <li><a href=\"#coordination-faq\">FAQ<\/a><\/li>\r\n    <\/ol>\r\n  <\/div>\r\n\r\n  <figure class=\"sc-figure\">\r\n    <img fetchpriority=\"high\"\r\n      src=\"https:\/\/www.cnspd.com\/wp-content\/uploads\/2026\/07\/type-1-type-2-type-3-spd-coordination-architecture.webp\"\r\n      alt=\"Type 1, Type 2 and Type 3 SPD coordination architecture from main switchboard to sensitive equipment\"\r\n      width=\"1448\"\r\n      height=\"1086\"\r\n      loading=\"eager\"\r\n      fetchpriority=\"high\"\r\n      decoding=\"async\">\r\n    <figcaption>\r\n      Coordinated or cascaded surge protection progressively reduces surge duty from the installation origin to the final equipment. The exact stages depend on the project and should not be copied as a universal bill of materials.\r\n    <\/figcaption>\r\n  <\/figure>\r\n\r\n  <section id=\"coordination-meaning\">\r\n    <h2><span class=\"ez-toc-section\" id=\"what-does-spd-coordination-actually-mean\"><\/span>What Does SPD Coordination Actually Mean?<span class=\"ez-toc-section-end\"><\/span><\/h2>\r\n\r\n    <p>\r\n      SPD coordination means that two or more protection stages operate as one planned system. The upstream SPD manages the surge duty expected at its position. The downstream SPD further limits the remaining voltage without receiving more surge energy than it is designed to withstand.\r\n      <a class=\"sc-ref\" href=\"#ref-1\">[1]<\/a>\r\n      <a class=\"sc-ref\" href=\"#ref-6\">[6]<\/a>\r\n    <\/p>\r\n\r\n    <div class=\"sc-definition\">\r\n      <strong>Plain-English meaning:<\/strong> installing several SPDs does not automatically create coordinated protection. The selected devices must share surge energy correctly, remain compatible with the electrical fault conditions and leave a sufficiently low voltage at the protected equipment.\r\n    <\/div>\r\n\r\n    <p>\r\n      This arrangement is also described as coordinated surge protection, cascaded surge protection or multi-stage surge protection. The purpose is not to install the maximum possible number of SPDs. The purpose is to place the required protection duty at each relevant electrical boundary.\r\n    <\/p>\r\n\r\n    <p>\r\n      IEC 61643-12 covers the selection, operation, location and coordination of SPDs connected to low-voltage AC power systems. IEC 60364-5-53 provides installation requirements. IEC 62305-4 addresses coordinated surge protection measures within a lightning protection zone concept.\r\n      <a class=\"sc-ref\" href=\"#ref-1\">[1]<\/a>\r\n      <a class=\"sc-ref\" href=\"#ref-3\">[3]<\/a>\r\n      <a class=\"sc-ref\" href=\"#ref-4\">[4]<\/a>\r\n    <\/p>\r\n\r\n    <p>\r\n      For basic definitions and test-waveform differences, see the separate\r\n      <a href=\"https:\/\/www.cnspd.com\/spd-type1-vs-type2-vs-type-3\/\">Type 1 vs Type 2 vs Type 3 SPD guide<\/a>.\r\n      This page focuses on how the protection stages work together.\r\n    <\/p>\r\n  <\/section>\r\n\r\n  <section id=\"three-coordination-checks\">\r\n    <h2><span class=\"ez-toc-section\" id=\"spd-coordination-includes-three-different-checks\"><\/span>SPD Coordination Includes Three Different Checks<span class=\"ez-toc-section-end\"><\/span><\/h2>\r\n\r\n    <p>\r\n      The word \u201ccoordination\u201d is often used too broadly. A project review should separate the following three questions.\r\n    <\/p>\r\n\r\n    <p class=\"sc-table-note\">\r\n      The evidence column matters most during technical approval because each check requires different documents.\r\n    <\/p>\r\n\r\n    <div class=\"sc-table-wrap\">\r\n      <table>\r\n        <thead>\r\n          <tr>\r\n            <th>Coordination check<\/th>\r\n            <th>Question to answer<\/th>\r\n            <th>Evidence required<\/th>\r\n          <\/tr>\r\n        <\/thead>\r\n        <tbody>\r\n          <tr>\r\n            <td data-label=\"Coordination check\"><strong>Energy coordination between SPDs<\/strong><\/td>\r\n            <td data-label=\"Question\">Can the upstream and downstream SPDs share the expected surge energy without overloading either stage?<\/td>\r\n            <td data-label=\"Evidence\">Manufacturer coordination table, tested product combination or documented decoupling condition<\/td>\r\n          <\/tr>\r\n          <tr>\r\n            <td data-label=\"Coordination check\"><strong>Protection coordination with equipment<\/strong><\/td>\r\n            <td data-label=\"Question\">Is the effective voltage reaching the equipment lower than the applicable equipment impulse withstand level?<\/td>\r\n            <td data-label=\"Evidence\">SPD Up, connection arrangement, conductor route, equipment Uw and project protection margin<\/td>\r\n          <\/tr>\r\n          <tr>\r\n            <td data-label=\"Coordination check\"><strong>Fault and backup protection<\/strong><\/td>\r\n            <td data-label=\"Question\">Is the SPD compatible with the prospective short-circuit current and its upstream fuse or circuit breaker?<\/td>\r\n            <td data-label=\"Evidence\">Short-circuit rating, maximum backup protection and manufacturer device-coordination schedule<\/td>\r\n          <\/tr>\r\n        <\/tbody>\r\n      <\/table>\r\n    <\/div>\r\n\r\n    <p class=\"sc-table-conclusion\">\r\n      A datasheet showing only Type, Iimp, In or Imax is not sufficient to approve a complete SPD coordination plan.\r\n    <\/p>\r\n\r\n    <div class=\"sc-warning\">\r\n      <p>\r\n        <strong>Do not confuse SPD-to-SPD energy coordination with SPD-to-circuit-breaker coordination.<\/strong>\r\n        Both checks may be necessary, but they address different risks.\r\n        <a class=\"sc-ref\" href=\"#ref-3\">[3]<\/a>\r\n        <a class=\"sc-ref\" href=\"#ref-11\">[11]<\/a>\r\n      <\/p>\r\n    <\/div>\r\n  <\/section>\r\n\r\n  <section id=\"one-spd-enough\">\r\n    <h2><span class=\"ez-toc-section\" id=\"is-one-spd-enough-for-the-whole-installation\"><\/span>Is One SPD Enough for the Whole Installation?<span class=\"ez-toc-section-end\"><\/span><\/h2>\r\n\r\n    <p>\r\n      One SPD may be sufficient where the electrical system is compact, no Type 1 lightning-current duty has been identified, downstream circuits are short and the effective protective level is suitable for every important load.\r\n    <\/p>\r\n\r\n    <p>\r\n      One SPD is less likely to be sufficient where the installation has several distribution levels, long outdoor feeders, separate buildings, critical electronics or multiple conductive services entering the same equipment.\r\n      <a class=\"sc-ref\" href=\"#ref-1\">[1]<\/a>\r\n      <a class=\"sc-ref\" href=\"#ref-4\">[4]<\/a>\r\n    <\/p>\r\n\r\n    <div class=\"sc-grid\">\r\n      <div class=\"sc-card sc-card-good\">\r\n        <h3>One SPD may be sufficient when<\/h3>\r\n        <ul>\r\n          <li>No partial lightning-current duty is identified.<\/li>\r\n          <li>There is one compact distribution board.<\/li>\r\n          <li>Downstream conductors are short and not highly exposed.<\/li>\r\n          <li>The effective protective level is suitable for every important load.<\/li>\r\n          <li>No unprotected signal line bypasses the power SPD.<\/li>\r\n          <li>The designer and SPD manufacturer confirm the arrangement.<\/li>\r\n        <\/ul>\r\n      <\/div>\r\n\r\n      <div class=\"sc-card sc-card-risk\">\r\n        <h3>Multiple stages should be evaluated when<\/h3>\r\n        <ul>\r\n          <li>An external lightning protection system is installed.<\/li>\r\n          <li>Partial lightning current may enter through a service.<\/li>\r\n          <li>Main and sub-distribution boards are widely separated.<\/li>\r\n          <li>Remote outdoor panels use long feeder routes.<\/li>\r\n          <li>PLCs, servers or control electronics are critical.<\/li>\r\n          <li>Switching equipment generates local transients.<\/li>\r\n        <\/ul>\r\n      <\/div>\r\n    <\/div>\r\n\r\n    <figure class=\"sc-figure\">\r\n      <img loading=\"lazy\"\r\n        src=\"https:\/\/www.cnspd.com\/wp-content\/uploads\/2026\/07\/is-one-spd-enough-coordination-decision-flow.webp\"\r\n        alt=\"Decision flow for determining whether one SPD or coordinated Type 1, Type 2 and Type 3 protection is required\"\r\n        width=\"1448\"\r\n        height=\"1086\"\r\n        loading=\"lazy\"\r\n        decoding=\"async\">\r\n      <figcaption>\r\n        Decide from the complete electrical architecture. A high kA value alone does not prove that one SPD can protect every panel and every item of equipment.\r\n      <\/figcaption>\r\n    <\/figure>\r\n\r\n    <div class=\"sc-note\">\r\n      <p>\r\n        <strong>Fast screening rule:<\/strong> if the project contains more than one lightning protection zone, a remote feeder or equipment with a lower impulse withstand than the upstream effective protective level, review an additional downstream stage.\r\n      <\/p>\r\n    <\/div>\r\n  <\/section>\r\n\r\n  <section id=\"protection-levels\">\r\n    <h2><span class=\"ez-toc-section\" id=\"where-do-type-1-type-2-and-type-3-spds-fit\"><\/span>Where Do Type 1, Type 2 and Type 3 SPDs Fit?<span class=\"ez-toc-section-end\"><\/span><\/h2>\r\n\r\n    <p>\r\n      IEC SPD types correspond to different test duties and typical installation roles. The project should assign each device according to the surge conditions at its location rather than order the same SPD for every panel.\r\n      <a class=\"sc-ref\" href=\"#ref-2\">[2]<\/a>\r\n      <a class=\"sc-ref\" href=\"#ref-5\">[5]<\/a>\r\n      <a class=\"sc-ref\" href=\"#ref-6\">[6]<\/a>\r\n    <\/p>\r\n\r\n    <div class=\"sc-table-wrap\">\r\n      <table class=\"sc-stage-table\">\r\n        <colgroup>\r\n          <col>\r\n          <col>\r\n          <col>\r\n          <col>\r\n        <\/colgroup>\r\n        <thead>\r\n          <tr>\r\n            <th>SPD stage<\/th>\r\n            <th>Typical location<\/th>\r\n            <th>Main role<\/th>\r\n            <th>Critical order data<\/th>\r\n          <\/tr>\r\n        <\/thead>\r\n        <tbody>\r\n          <tr>\r\n            <td data-label=\"SPD stage\"><strong>Type 1<\/strong><\/td>\r\n            <td data-label=\"Typical location\">Installation origin or main incoming board where lightning-current duty is expected<\/td>\r\n            <td data-label=\"Main role\">Discharge partial lightning current using the Type 1 test duty<\/td>\r\n            <td data-label=\"Critical order data\">Iimp, total current where relevant, Uc, Up, poles, protection modes and earthing system<\/td>\r\n          <\/tr>\r\n          <tr>\r\n            <td data-label=\"SPD stage\"><strong>Type 1+2<\/strong><\/td>\r\n            <td data-label=\"Typical location\">Main incoming board<\/td>\r\n            <td data-label=\"Main role\">Meet Type 1 and Type 2 test duties within one product<\/td>\r\n            <td data-label=\"Critical order data\">Both classifications, Iimp, In, Up, backup protection and certificate scope<\/td>\r\n          <\/tr>\r\n          <tr>\r\n            <td data-label=\"SPD stage\"><strong>Type 2<\/strong><\/td>\r\n            <td data-label=\"Typical location\">Main board, sub-distribution board, machine cabinet or equipment panel<\/td>\r\n            <td data-label=\"Main role\">Limit induced lightning, residual upstream and switching surges<\/td>\r\n            <td data-label=\"Critical order data\">Uc, In, Imax, Up, short-circuit conditions, poles and protection modes<\/td>\r\n          <\/tr>\r\n          <tr>\r\n            <td data-label=\"SPD stage\"><strong>Type 3<\/strong><\/td>\r\n            <td data-label=\"Typical location\">Close to sensitive terminal equipment<\/td>\r\n            <td data-label=\"Main role\">Provide final voltage limiting after suitable upstream protection<\/td>\r\n            <td data-label=\"Critical order data\">Uoc or declared Type 3 duty, Up, load voltage, installation point and upstream coordination<\/td>\r\n          <\/tr>\r\n        <\/tbody>\r\n      <\/table>\r\n    <\/div>\r\n\r\n    <p class=\"sc-table-conclusion\">\r\n      Type 1, Type 2 and Type 3 are different engineering roles. They are not low, medium and high product-quality levels.\r\n    <\/p>\r\n  <\/section>\r\n\r\n  <section id=\"selection-process\">\r\n    <h2><span class=\"ez-toc-section\" id=\"how-to-design-coordinated-surge-protection\"><\/span>How to Design Coordinated Surge Protection<span class=\"ez-toc-section-end\"><\/span><\/h2>\r\n\r\n    <ol class=\"sc-steps\">\r\n      <li>\r\n        <strong>Identify where surge energy can enter.<\/strong>\r\n        Review the external lightning protection system, incoming supply route, overhead or underground services, inter-building cables and the lightning risk assessment.\r\n      <\/li>\r\n      <li>\r\n        <strong>Mark every important distribution level.<\/strong>\r\n        Show the main low-voltage board, sub-distribution boards, UPS panels, machine cabinets, inverter panels, EV charger panels and other relevant enclosures on the single-line diagram.\r\n      <\/li>\r\n      <li>\r\n        <strong>Identify critical equipment and its impulse withstand.<\/strong>\r\n        Record PLCs, servers, control power supplies, industrial computers, inverters, chargers and other loads that may require a lower protective level.\r\n      <\/li>\r\n      <li>\r\n        <strong>Select the correct SPD duty at each position.<\/strong>\r\n        Evaluate Type 1 where lightning-current duty exists. Use Type 2 for distribution-level residual, induced and switching surges. Evaluate Type 3 close to sensitive loads where final-stage protection is required.\r\n      <\/li>\r\n      <li>\r\n        <strong>Check the effective protective level.<\/strong>\r\n        Do not compare the equipment withstand only with the SPD datasheet Up. Include voltage contributed by the connection arrangement and conductors.\r\n        <a class=\"sc-ref\" href=\"#ref-3\">[3]<\/a>\r\n        <a class=\"sc-ref\" href=\"#ref-7\">[7]<\/a>\r\n        <a class=\"sc-ref\" href=\"#ref-12\">[12]<\/a>\r\n      <\/li>\r\n      <li>\r\n        <strong>Verify energy coordination between stages.<\/strong>\r\n        Confirm whether the selected devices are tested as a coordinated combination, require conductor impedance or require an external decoupling component.\r\n        <a class=\"sc-ref\" href=\"#ref-1\">[1]<\/a>\r\n        <a class=\"sc-ref\" href=\"#ref-6\">[6]<\/a>\r\n      <\/li>\r\n      <li>\r\n        <strong>Verify short-circuit and backup protection conditions.<\/strong>\r\n        Check the prospective short-circuit current, the maximum permitted backup fuse or circuit breaker and the model-specific installation instructions.\r\n      <\/li>\r\n      <li>\r\n        <strong>Review every conductive service.<\/strong>\r\n        An AC power SPD does not protect Ethernet, RS485, 4\u201320 mA, coaxial, telephone or other signal circuits entering the same equipment.\r\n        <a class=\"sc-ref\" href=\"#ref-4\">[4]<\/a>\r\n      <\/li>\r\n    <\/ol>\r\n  <\/section>\r\n\r\n  <section id=\"type-1-type-2\">\r\n    <h2><span class=\"ez-toc-section\" id=\"when-do-type-1-and-type-2-spds-work-together\"><\/span>When Do Type 1 and Type 2 SPDs Work Together?<span class=\"ez-toc-section-end\"><\/span><\/h2>\r\n\r\n    <p>\r\n      Type 1 and Type 2 coordination is evaluated where the installation must manage both lightning-current duty and a lower residual voltage for downstream distribution or equipment.\r\n    <\/p>\r\n\r\n    <p>\r\n      The Type 1 stage addresses the surge duty expected at the origin. A downstream Type 2 stage further limits the remaining voltage and handles switching or induced surges occurring after the origin.\r\n      <a class=\"sc-ref\" href=\"#ref-5\">[5]<\/a>\r\n      <a class=\"sc-ref\" href=\"#ref-6\">[6]<\/a>\r\n    <\/p>\r\n\r\n    <div class=\"sc-table-wrap\">\r\n      <table>\r\n        <thead>\r\n          <tr>\r\n            <th>Project condition<\/th>\r\n            <th>Initial configuration direction<\/th>\r\n            <th>What still requires confirmation<\/th>\r\n          <\/tr>\r\n        <\/thead>\r\n        <tbody>\r\n          <tr>\r\n            <td data-label=\"Project condition\">Type 1 and Type 2 duties are required at the same main board<\/td>\r\n            <td data-label=\"Initial direction\">Evaluate a Type 1+2 combined SPD<\/td>\r\n            <td data-label=\"Still confirm\">Iimp, In, Up, earthing arrangement, short-circuit conditions and certificate scope<\/td>\r\n          <\/tr>\r\n          <tr>\r\n            <td data-label=\"Project condition\">Type 1 is installed at the origin and a separate downstream board exists<\/td>\r\n            <td data-label=\"Initial direction\">Type 1 at origin plus Type 2 downstream<\/td>\r\n            <td data-label=\"Still confirm\">Energy coordination, cable route, conductor impedance and manufacturer requirements<\/td>\r\n          <\/tr>\r\n          <tr>\r\n            <td data-label=\"Project condition\">No Type 1 lightning-current duty is identified<\/td>\r\n            <td data-label=\"Initial direction\">Type 2 at the main distribution board may be appropriate<\/td>\r\n            <td data-label=\"Still confirm\">National rules, risk assessment, equipment withstand and downstream circuit layout<\/td>\r\n          <\/tr>\r\n          <tr>\r\n            <td data-label=\"Project condition\">Remote machine, outdoor cabinet or separate building<\/td>\r\n            <td data-label=\"Initial direction\">Upstream protection plus an additional Type 2 at the remote distribution point<\/td>\r\n            <td data-label=\"Still confirm\">Feeder exposure, bonding, earthing, conductor route and signal-line entries<\/td>\r\n          <\/tr>\r\n        <\/tbody>\r\n      <\/table>\r\n    <\/div>\r\n\r\n    <p class=\"sc-table-conclusion\">\r\n      Type 1 and Type 2 are complementary stages. A Type 1 rating does not automatically provide the final protective level required by every downstream load.\r\n    <\/p>\r\n  <\/section>\r\n\r\n  <section id=\"type-3-protection\">\r\n    <h2><span class=\"ez-toc-section\" id=\"does-sensitive-equipment-need-a-type-3-spd\"><\/span>Does Sensitive Equipment Need a Type 3 SPD?<span class=\"ez-toc-section-end\"><\/span><\/h2>\r\n\r\n    <p>\r\n      Not every electronic device requires a separate Type 3 SPD. Type 3 should be evaluated where the upstream protection cannot be shown to maintain an acceptable voltage at the equipment terminals.\r\n    <\/p>\r\n\r\n    <p>\r\n      Type 3 is normally used as a final stage close to the protected load and should be coordinated with suitable upstream Type 2 or Type 1+2 protection. It is not a substitute for service-entrance or distribution-board protection.\r\n      <a class=\"sc-ref\" href=\"#ref-5\">[5]<\/a>\r\n      <a class=\"sc-ref\" href=\"#ref-6\">[6]<\/a>\r\n    <\/p>\r\n\r\n    <div class=\"sc-grid\">\r\n      <div class=\"sc-card sc-card-risk\">\r\n        <h3>Evaluate Type 3 when<\/h3>\r\n        <ul>\r\n          <li>The equipment has a low impulse withstand level.<\/li>\r\n          <li>The load is critical, expensive or difficult to replace.<\/li>\r\n          <li>The equipment is far from the nearest distribution SPD.<\/li>\r\n          <li>The downstream cable may receive additional induced surges.<\/li>\r\n          <li>Local switching transients occur close to the equipment.<\/li>\r\n          <li>The equipment manufacturer specifies point-of-use protection.<\/li>\r\n        <\/ul>\r\n      <\/div>\r\n\r\n      <div class=\"sc-card sc-card-good\">\r\n        <h3>A separate Type 3 may be unnecessary when<\/h3>\r\n        <ul>\r\n          <li>A suitable Type 2+3 device is already installed close to the load.<\/li>\r\n          <li>The upstream SPD and conductor arrangement provide a verified protective level.<\/li>\r\n          <li>The equipment has documented integrated surge protection.<\/li>\r\n          <li>The equipment withstand level is adequate for the verified residual voltage.<\/li>\r\n        <\/ul>\r\n      <\/div>\r\n    <\/div>\r\n\r\n    <div class=\"sc-note\">\r\n      <p>\r\n        <strong>Buyer meaning:<\/strong> request the Type 3 coordination condition, not only the Type 3 datasheet. The supplier should identify the compatible upstream SPD and any distance or decoupling requirement.\r\n      <\/p>\r\n    <\/div>\r\n  <\/section>\r\n\r\n  <section id=\"distance-coordination\">\r\n    <h2><span class=\"ez-toc-section\" id=\"spd-distance-and-energy-coordination\"><\/span>SPD Distance and Energy Coordination<span class=\"ez-toc-section-end\"><\/span><\/h2>\r\n\r\n    <p>\r\n      Distance affects two different parts of the protection design. These should not be combined into one simplified \u201c10 m rule.\u201d\r\n    <\/p>\r\n\r\n    <h3>Distance from the SPD to the protected equipment<\/h3>\r\n\r\n    <p>\r\n      A long conductor between an SPD and the protected equipment can receive additional induced surges. The conductors also contribute voltage during a fast surge current. Guidance based on IEC installation principles commonly uses approximately 10 m as a point at which additional protection close to the load should be considered.\r\n      <a class=\"sc-ref\" href=\"#ref-3\">[3]<\/a>\r\n      <a class=\"sc-ref\" href=\"#ref-7\">[7]<\/a>\r\n    <\/p>\r\n\r\n    <p>\r\n      This does not mean that every circuit longer than 10 m automatically requires a Type 3 SPD. The equipment withstand, conductor route, electromagnetic environment and effective upstream protective level still require review.\r\n    <\/p>\r\n\r\n    <h3>Distance between upstream and downstream SPDs<\/h3>\r\n\r\n    <p>\r\n      Cable impedance between SPD stages can influence how surge energy is shared. However, there is no universal separation distance that guarantees coordination for every Type 1, Type 2 and Type 3 product combination.\r\n    <\/p>\r\n\r\n    <p>\r\n      Some product families are tested for close installation. Some combined devices coordinate multiple test duties internally. Other combinations may require conductor impedance or an external decoupling component. The applicable manufacturer coordination data must determine the arrangement.\r\n      <a class=\"sc-ref\" href=\"#ref-1\">[1]<\/a>\r\n      <a class=\"sc-ref\" href=\"#ref-6\">[6]<\/a>\r\n      <a class=\"sc-ref\" href=\"#ref-11\">[11]<\/a>\r\n    <\/p>\r\n\r\n    <figure class=\"sc-figure\">\r\n      <img loading=\"lazy\"\r\n        src=\"https:\/\/www.cnspd.com\/wp-content\/uploads\/2026\/07\/spd-distance-energy-coordination-comparison.webp\"\r\n        alt=\"SPD distance and energy coordination comparison showing short separation, coordinated stages and remote equipment protection\"\r\n        width=\"1448\"\r\n        height=\"1086\"\r\n        loading=\"lazy\"\r\n        decoding=\"async\">\r\n      <figcaption>\r\n        Distance between protection stages and distance from the final SPD to the equipment are different questions. Manufacturer coordination data takes priority over a simplified distance rule.\r\n      <\/figcaption>\r\n    <\/figure>\r\n\r\n    <div class=\"sc-warning\">\r\n      <p>\r\n        <strong>Do not specify \u201c10 m between every SPD\u201d as a universal purchasing condition.<\/strong>\r\n        Ask whether the proposed devices are tested as a coordinated combination, whether external decoupling is required and whether additional protection is needed near remote equipment.\r\n      <\/p>\r\n    <\/div>\r\n\r\n    <h3>SPD connection leads are a separate issue<\/h3>\r\n\r\n    <p>\r\n      The conductors connecting each SPD to the live conductors and protective earth should be short, direct and installed according to the applicable standard and manufacturer instructions. Excessive connection length can increase the effective voltage reaching the protected equipment.\r\n      <a class=\"sc-ref\" href=\"#ref-3\">[3]<\/a>\r\n      <a class=\"sc-ref\" href=\"#ref-7\">[7]<\/a>\r\n    <\/p>\r\n\r\n    <p>\r\n      See the separate\r\n      <a href=\"https:\/\/www.cnspd.com\/spd-cable-length-0-5m\/\">SPD connection length and 0.5 m installation guide<\/a>\r\n      for detailed lead-length considerations.\r\n    <\/p>\r\n  <\/section>\r\n\r\n  <section id=\"combined-or-separate\">\r\n    <h2><span class=\"ez-toc-section\" id=\"combined-spd-or-separate-protection-stages\"><\/span>Combined SPD or Separate Protection Stages?<span class=\"ez-toc-section-end\"><\/span><\/h2>\r\n\r\n    <p>\r\n      A combined SPD is tested for more than one duty within one product. Common examples include Type 1+2 and Type 2+3 devices.\r\n    <\/p>\r\n\r\n    <div class=\"sc-table-wrap\">\r\n      <table>\r\n        <thead>\r\n          <tr>\r\n            <th>Configuration<\/th>\r\n            <th>Main advantage<\/th>\r\n            <th>Limit that must be checked<\/th>\r\n          <\/tr>\r\n        <\/thead>\r\n        <tbody>\r\n          <tr>\r\n            <td data-label=\"Configuration\"><strong>Type 1+2 combined SPD<\/strong><\/td>\r\n            <td data-label=\"Main advantage\">Provides both test duties at one installation point and avoids coordination between two separate products at that position<\/td>\r\n            <td data-label=\"Limit\">Does not automatically protect remote distribution boards or sensitive equipment<\/td>\r\n          <\/tr>\r\n          <tr>\r\n            <td data-label=\"Configuration\"><strong>Separate Type 1 and Type 2 SPDs<\/strong><\/td>\r\n            <td data-label=\"Main advantage\">Allows the stages to be installed at different distribution levels<\/td>\r\n            <td data-label=\"Limit\">Energy coordination and any separation or decoupling requirement must be documented<\/td>\r\n          <\/tr>\r\n          <tr>\r\n            <td data-label=\"Configuration\"><strong>Type 2+3 combined SPD<\/strong><\/td>\r\n            <td data-label=\"Main advantage\">Can provide distribution and final-stage duties close to sensitive equipment<\/td>\r\n            <td data-label=\"Limit\">An upstream Type 1 or Type 2 stage may still be required according to project exposure<\/td>\r\n          <\/tr>\r\n        <\/tbody>\r\n      <\/table>\r\n    <\/div>\r\n\r\n    <p class=\"sc-table-conclusion\">\r\n      A combined classification describes the tested duties of one product. It does not prove that an entire building is protected from one installation point.\r\n    <\/p>\r\n  <\/section>\r\n\r\n  <section id=\"worked-example\">\r\n    <h2><span class=\"ez-toc-section\" id=\"worked-example-main-board-machine-panel-and-plc-cabinet\"><\/span>Worked Example: Main Board, Machine Panel and PLC Cabinet<span class=\"ez-toc-section-end\"><\/span><\/h2>\r\n\r\n    <p>\r\n      The following is an illustrative engineering example. It is not a real customer project and it does not specify mandatory product ratings.\r\n    <\/p>\r\n\r\n    <div class=\"sc-example\">\r\n      <h3>Illustrative system layout<\/h3>\r\n\r\n      <div class=\"sc-route\" aria-label=\"Illustrative SPD coordination route\">\r\n        <div class=\"sc-route-stage\">\r\n          <strong>Main LV board<\/strong>\r\n          <span>External LPS present and partial lightning-current duty identified<\/span>\r\n        <\/div>\r\n\r\n        <div class=\"sc-route-arrow\" aria-hidden=\"true\">\u2192<\/div>\r\n\r\n        <div class=\"sc-route-stage\">\r\n          <strong>Machine panel<\/strong>\r\n          <span>Located 35 m downstream from the main board<\/span>\r\n        <\/div>\r\n\r\n        <div class=\"sc-route-arrow\" aria-hidden=\"true\">\u2192<\/div>\r\n\r\n        <div class=\"sc-route-stage\">\r\n          <strong>PLC cabinet<\/strong>\r\n          <span>Located another 12 m downstream from the machine panel<\/span>\r\n        <\/div>\r\n      <\/div>\r\n\r\n      <ol>\r\n        <li>\r\n          <strong>Main LV board:<\/strong> Type 1 or Type 1+2 duty should be evaluated because partial lightning current has been identified at the installation origin.\r\n        <\/li>\r\n        <li>\r\n          <strong>Machine panel:<\/strong> an additional Type 2 SPD should be evaluated because the panel is remote from the origin and may be exposed to residual or induced surges along the feeder.\r\n        <\/li>\r\n        <li>\r\n          <strong>PLC cabinet:<\/strong> Type 3 or Type 2+3 protection should be evaluated if the effective protection from the machine-panel SPD is not low enough for the PLC power supply and connected electronics.\r\n        <\/li>\r\n        <li>\r\n          <strong>Signal circuits:<\/strong> Ethernet, RS485 and sensor conductors entering the PLC cabinet require a separate interface review. The power SPDs do not protect these circuits.\r\n        <\/li>\r\n        <li>\r\n          <strong>Approval condition:<\/strong> the exact SPD models, Up values, backup protection and energy coordination must be confirmed from manufacturer documentation before the configuration is released.\r\n        <\/li>\r\n      <\/ol>\r\n\r\n      <div class=\"sc-example-result\">\r\n        <p>\r\n          <strong>Engineering conclusion:<\/strong> the distances do not automatically prove that three SPD types are mandatory. They show why the designer must verify the origin duty, downstream surge exposure, equipment withstand and model-level coordination instead of ordering one high-current SPD for the complete system.\r\n        <\/p>\r\n      <\/div>\r\n    <\/div>\r\n  <\/section>\r\n\r\n  <section id=\"application-examples\">\r\n    <h2><span class=\"ez-toc-section\" id=\"how-to-judge-spd-coordination-in-different-projects\"><\/span>How to Judge SPD Coordination in Different Projects<span class=\"ez-toc-section-end\"><\/span><\/h2>\r\n\r\n    <p>\r\n      The following examples are initial engineering directions. They are not universal bills of materials. Final configurations must follow the project single-line diagram, adopted standards and equipment instructions.\r\n    <\/p>\r\n\r\n    <div class=\"sc-table-wrap\">\r\n      <table>\r\n        <thead>\r\n          <tr>\r\n            <th>Application<\/th>\r\n            <th>Typical protection approach<\/th>\r\n            <th>Additional coordination checks<\/th>\r\n          <\/tr>\r\n        <\/thead>\r\n        <tbody>\r\n          <tr>\r\n            <td data-label=\"Application\"><strong>Data centre<\/strong><\/td>\r\n            <td data-label=\"Typical approach\">Origin protection where Type 1 duty applies, followed by Type 2 at important UPS, bypass or distribution points and final protection where sensitive equipment requires it<\/td>\r\n            <td data-label=\"Additional checks\">Redundant feeds, UPS operating modes, PDU routes, rack distance, network lines and monitoring circuits<\/td>\r\n          <\/tr>\r\n          <tr>\r\n            <td data-label=\"Application\"><strong>Industrial control system<\/strong><\/td>\r\n            <td data-label=\"Typical approach\">Main-board protection followed by Type 2 at machine or control cabinets; final protection may be required near PLCs or sensitive power supplies<\/td>\r\n            <td data-label=\"Additional checks\">VFD switching, motor circuits, 24 V DC supplies, sensors, RS485, Ethernet and equipotential bonding<\/td>\r\n          <\/tr>\r\n          <tr>\r\n            <td data-label=\"Application\"><strong>Solar PV system<\/strong><\/td>\r\n            <td data-label=\"Typical approach\">Coordinate AC and PV DC protection separately. Use PV-specific SPDs on the DC side and assign Type 1 or Type 2 duty according to the lightning protection concept<\/td>\r\n            <td data-label=\"Additional checks\">Maximum PV voltage, Ucpv, inverter location, DC cable route, LPS relationship and PV-specific standards<\/td>\r\n          <\/tr>\r\n          <tr>\r\n            <td data-label=\"Application\"><strong>EV charging project<\/strong><\/td>\r\n            <td data-label=\"Typical approach\">Review the site incomer, charger distribution board and individual charging equipment as separate protection points<\/td>\r\n            <td data-label=\"Additional checks\">Outdoor feeder exposure, EVSE instructions, national rules, communication circuits and IEC 60364-7-722<\/td>\r\n          <\/tr>\r\n          <tr>\r\n            <td data-label=\"Application\"><strong>BESS and PCS<\/strong><\/td>\r\n            <td data-label=\"Typical approach\">Review grid-side AC, PCS, auxiliary AC, battery-side DC and monitoring circuits independently<\/td>\r\n            <td data-label=\"Additional checks\">Maximum DC voltage, grounding concept, PCS internal protection, fault-current conditions and communication interfaces<\/td>\r\n          <\/tr>\r\n        <\/tbody>\r\n      <\/table>\r\n    <\/div>\r\n\r\n    <p class=\"sc-table-conclusion\">\r\n      A coordinated power SPD system protects only the power conductors on which it is installed. Data, control and communication interfaces require their own review.\r\n    <\/p>\r\n\r\n    <p>\r\n      PV SPD selection and coordination are specifically addressed by IEC 61643-31 and IEC 61643-32.\r\n      <a class=\"sc-ref\" href=\"#ref-9\">[9]<\/a>\r\n      EV charging installations should also be checked against IEC 60364-7-722 and the EVSE manufacturer\u2019s instructions.\r\n      <a class=\"sc-ref\" href=\"#ref-10\">[10]<\/a>\r\n    <\/p>\r\n  <\/section>\r\n\r\n  <section id=\"model-approval\">\r\n    <h2><span class=\"ez-toc-section\" id=\"how-to-approve-the-actual-spd-model-combination\"><\/span>How to Approve the Actual SPD Model Combination<span class=\"ez-toc-section-end\"><\/span><\/h2>\r\n\r\n    <p>\r\n      A general article can explain the coordination logic. It cannot prove that two specific SPD models are energy coordinated. Model-level approval requires product-specific evidence.\r\n    <\/p>\r\n\r\n    <p>\r\n      This distinction is important because different technologies and product families can require different separation distances, decoupling components or upstream and downstream combinations. A coordination condition published for one manufacturer\u2019s models must not be transferred to another manufacturer\u2019s products.\r\n      <a class=\"sc-ref\" href=\"#ref-11\">[11]<\/a>\r\n    <\/p>\r\n\r\n    <div class=\"sc-table-wrap\">\r\n      <table>\r\n        <thead>\r\n          <tr>\r\n            <th>Proposed configuration<\/th>\r\n            <th>Approval status<\/th>\r\n            <th>Minimum evidence before release<\/th>\r\n          <\/tr>\r\n        <\/thead>\r\n        <tbody>\r\n          <tr>\r\n            <td data-label=\"Configuration\">One combined Type 1+2 SPD at the origin<\/td>\r\n            <td data-label=\"Approval status\"><span class=\"sc-status sc-status-document\">Document check<\/span><\/td>\r\n            <td data-label=\"Minimum evidence\">Model-specific Type 1 and Type 2 classification, Iimp, In, Up, Uc, short-circuit conditions and backup protection<\/td>\r\n          <\/tr>\r\n          <tr>\r\n            <td data-label=\"Configuration\">Separate Type 1 and Type 2 SPDs from the same product family<\/td>\r\n            <td data-label=\"Approval status\"><span class=\"sc-status sc-status-confirm\">Coordination confirmation<\/span><\/td>\r\n            <td data-label=\"Minimum evidence\">Manufacturer coordination table or written statement covering the exact upstream and downstream models<\/td>\r\n          <\/tr>\r\n          <tr>\r\n            <td data-label=\"Configuration\">Type 2 followed by Type 3 or Type 2+3<\/td>\r\n            <td data-label=\"Approval status\"><span class=\"sc-status sc-status-confirm\">Protection confirmation<\/span><\/td>\r\n            <td data-label=\"Minimum evidence\">Upstream compatibility, effective protection level, distance condition and protected-equipment withstand<\/td>\r\n          <\/tr>\r\n          <tr>\r\n            <td data-label=\"Configuration\">SPDs from different manufacturers<\/td>\r\n            <td data-label=\"Approval status\"><span class=\"sc-status sc-status-project\">Project assessment<\/span><\/td>\r\n            <td data-label=\"Minimum evidence\">Written compatibility guidance, engineering calculation or suitable laboratory or field validation<\/td>\r\n          <\/tr>\r\n          <tr>\r\n            <td data-label=\"Configuration\">Alternative SPD replacing an approved project model<\/td>\r\n            <td data-label=\"Approval status\"><span class=\"sc-status sc-status-project\">Full re-evaluation<\/span><\/td>\r\n            <td data-label=\"Minimum evidence\">Type, Uc, Up, discharge ratings, fault conditions, dimensions, wiring, certificate scope and coordination data<\/td>\r\n          <\/tr>\r\n        <\/tbody>\r\n      <\/table>\r\n    <\/div>\r\n\r\n    <p class=\"sc-table-conclusion\">\r\n      Procurement rule: never infer coordination from similar Type labels, similar kA ratings or similar external dimensions.\r\n    <\/p>\r\n\r\n    <div class=\"sc-note\">\r\n      <p>\r\n        <strong>Professional boundary:<\/strong> LEEYEE model recommendations should only be released after the exact system information and applicable coordination documents have been reviewed. Unverified coordination distances or compatibility claims should not be added to an OEM datasheet or project submittal.\r\n      <\/p>\r\n    <\/div>\r\n  <\/section>\r\n\r\n  <section id=\"ordering-checklist\">\r\n    <h2><span class=\"ez-toc-section\" id=\"what-buyers-should-confirm-before-ordering\"><\/span>What Buyers Should Confirm Before Ordering<span class=\"ez-toc-section-end\"><\/span><\/h2>\r\n\r\n    <p>\r\n      Do not request only \u201cone Type 1 SPD\u201d or \u201cone Type 2 SPD.\u201d Send enough information for the supplier to review the complete protection chain.\r\n    <\/p>\r\n\r\n    <div class=\"sc-checklist\">\r\n      <h3>Project information to provide<\/h3>\r\n      <ul>\r\n        <li>Single-line electrical diagram;<\/li>\r\n        <li>Nominal and maximum operating voltage;<\/li>\r\n        <li>AC, PV DC, battery DC or signal application;<\/li>\r\n        <li>TN-S, TN-C-S, TT, IT or other earthing arrangement;<\/li>\r\n        <li>External lightning protection system details;<\/li>\r\n        <li>Incoming supply and lightning exposure;<\/li>\r\n        <li>Main and downstream board locations;<\/li>\r\n        <li>Approximate conductor lengths between boards and loads;<\/li>\r\n        <li>Required SPD Type or combined classification;<\/li>\r\n        <li>Uc, Up, Iimp, In, Imax or Uoc requirements;<\/li>\r\n        <li>Prospective short-circuit current;<\/li>\r\n        <li>Upstream fuse or circuit-breaker details;<\/li>\r\n        <li>Number of poles and protection modes;<\/li>\r\n        <li>Equipment impulse withstand where available;<\/li>\r\n        <li>Required standards and certification markets;<\/li>\r\n        <li>Remote signalling requirement;<\/li>\r\n        <li>OEM label and packaging requirements;<\/li>\r\n        <li>Quantity and sample-approval process.<\/li>\r\n      <\/ul>\r\n    <\/div>\r\n\r\n    <h3>Documents to request from the SPD supplier<\/h3>\r\n\r\n    <ul>\r\n      <li>Datasheet for every proposed SPD stage;<\/li>\r\n      <li>Installation instructions and wiring arrangement;<\/li>\r\n      <li>Manufacturer coordination table or written coordination statement;<\/li>\r\n      <li>Required distance or decoupling conditions;<\/li>\r\n      <li>Maximum backup fuse or circuit-breaker data;<\/li>\r\n      <li>Model-specific certificate or test-report scope;<\/li>\r\n      <li>Dimensions, terminal capacity and remote-contact information;<\/li>\r\n      <li>Sample validation plan for OEM or project approval.<\/li>\r\n    <\/ul>\r\n\r\n    <div class=\"sc-warning\">\r\n      <p>\r\n        <strong>Mixing brands requires additional verification.<\/strong>\r\n        Type labels alone do not prove energy coordination. Where upstream and downstream SPDs come from different manufacturers, obtain written compatibility guidance or complete a project-specific engineering assessment.\r\n      <\/p>\r\n    <\/div>\r\n\r\n    <div class=\"sc-cta\">\r\n      <h2><span class=\"ez-toc-section\" id=\"confirm-the-complete-spd-configuration\"><\/span>Confirm the Complete SPD Configuration<span class=\"ez-toc-section-end\"><\/span><\/h2>\r\n      <p>\r\n        Send your single-line diagram, system voltage, earthing arrangement, panel locations, conductor lengths and required standards for technical review.\r\n      <\/p>\r\n      <p>\r\n        LEEYEE provides surge protection selection and OEM configuration support through CNSPD, LEEYEE\u2019s surge-protection-focused platform for global technical buyers.\r\n      <\/p>\r\n      <button\r\n        type=\"button\"\r\n        class=\"leeyee-about-btn-light leeyee-site-popup-btn\"\r\n        aria-label=\"Confirm an SPD Coordination Plan\">\r\n        <span class=\"w-btn-label\">Confirm an SPD Coordination Plan<\/span>\r\n      <\/button>\r\n    <\/div>\r\n  <\/section>\r\n\r\n  <section id=\"common-mistakes\">\r\n    <h2><span class=\"ez-toc-section\" id=\"common-spd-coordination-mistakes\"><\/span>Common SPD Coordination Mistakes<span class=\"ez-toc-section-end\"><\/span><\/h2>\r\n\r\n    <h3>Choosing only by the largest kA value<\/h3>\r\n    <p>\r\n      Iimp, In and Imax represent different test duties. A larger number does not correct the wrong SPD type, Uc, Up, protection mode or installation position.\r\n    <\/p>\r\n\r\n    <h3>Assuming a Type 1 SPD protects every downstream load<\/h3>\r\n    <p>\r\n      Type 1 manages lightning-current duty at its installation point. Additional Type 2 or Type 3 stages may still be required to achieve the necessary downstream protective level.\r\n    <\/p>\r\n\r\n    <h3>Installing Type 3 without suitable upstream protection<\/h3>\r\n    <p>\r\n      Type 3 is final equipment protection. It should not be selected as the primary protection device for the service entrance or main distribution board.\r\n    <\/p>\r\n\r\n    <h3>Applying one 10 m rule to every situation<\/h3>\r\n    <p>\r\n      Distance from an SPD to equipment and distance between two SPD stages are different issues. Product-specific coordination data remains necessary.\r\n    <\/p>\r\n\r\n    <h3>Comparing equipment withstand only with datasheet Up<\/h3>\r\n    <p>\r\n      The installation arrangement and connecting conductors affect the effective voltage that can reach the equipment.\r\n    <\/p>\r\n\r\n    <h3>Copying another manufacturer\u2019s coordination table<\/h3>\r\n    <p>\r\n      A model-specific distance or compatibility table applies only to the stated products and conditions. It cannot be transferred to another SPD family without verification.\r\n    <\/p>\r\n\r\n    <h3>Ignoring short-circuit and backup protection<\/h3>\r\n    <p>\r\n      Surge-energy coordination does not replace verification of prospective short-circuit current, backup protection and disconnector requirements.\r\n    <\/p>\r\n\r\n    <h3>Protecting only the AC power line<\/h3>\r\n    <p>\r\n      Ethernet, RS485, sensor, coaxial and other conductive circuits can bypass the power SPD and carry a transient into the same equipment.\r\n    <\/p>\r\n  <\/section>\r\n\r\n  <section id=\"coordination-faq\">\r\n    <h2><span class=\"ez-toc-section\" id=\"spd-coordination-faq\"><\/span>SPD Coordination FAQ<span class=\"ez-toc-section-end\"><\/span><\/h2>\r\n\r\n    <div class=\"sc-faq\">\r\n      <details>\r\n        <summary>Do all installations need Type 1, Type 2 and Type 3 SPDs?<\/summary>\r\n        <div class=\"sc-faq-answer\">\r\n          <p>\r\n            No. The required stages depend on lightning-current exposure, distribution layout, conductor routes, equipment sensitivity and the rules adopted for the project. Some compact installations may use Type 2 only. Other projects may need Type 1+2 at the origin and additional Type 2 or Type 3 protection downstream.\r\n          <\/p>\r\n        <\/div>\r\n      <\/details>\r\n\r\n      <details>\r\n        <summary>Can a Type 1+2 SPD replace separate Type 1 and Type 2 devices?<\/summary>\r\n        <div class=\"sc-faq-answer\">\r\n          <p>\r\n            It can provide both test duties at one installation point. It does not automatically replace downstream protection for remote panels, long feeders or sensitive equipment.\r\n          <\/p>\r\n        <\/div>\r\n      <\/details>\r\n\r\n      <details>\r\n        <summary>Must Type 1 and Type 2 SPDs always be separated by 10 metres?<\/summary>\r\n        <div class=\"sc-faq-answer\">\r\n          <p>\r\n            No. There is no universal 10 m separation rule for every SPD combination. The required arrangement depends on SPD technology, manufacturer testing, conductor impedance and whether external decoupling is required.\r\n          <\/p>\r\n        <\/div>\r\n      <\/details>\r\n\r\n      <details>\r\n        <summary>Does equipment more than 10 metres from an SPD need another SPD?<\/summary>\r\n        <div class=\"sc-faq-answer\">\r\n          <p>\r\n            Additional protection should be evaluated because long conductors can receive induced surges and increase the effective voltage at the load. The final decision depends on the equipment withstand level, conductor route, protective level and applicable installation rules.\r\n          <\/p>\r\n        <\/div>\r\n      <\/details>\r\n\r\n      <details>\r\n        <summary>Can Type 3 be installed alone?<\/summary>\r\n        <div class=\"sc-faq-answer\">\r\n          <p>\r\n            Type 3 is intended as final-stage protection close to sensitive equipment. It should be coordinated with suitable upstream Type 2 or Type 1+2 protection rather than used as the main installation SPD.\r\n          <\/p>\r\n        <\/div>\r\n      <\/details>\r\n\r\n      <details>\r\n        <summary>Can SPDs from different manufacturers be coordinated?<\/summary>\r\n        <div class=\"sc-faq-answer\">\r\n          <p>\r\n            They may be usable in the same project, but compatibility must not be assumed from the Type labels. Obtain written coordination information or complete a project-specific engineering assessment.\r\n          <\/p>\r\n        <\/div>\r\n      <\/details>\r\n\r\n      <details>\r\n        <summary>Does an SPD built into an inverter, UPS or EV charger remove the need for an external SPD?<\/summary>\r\n        <div class=\"sc-faq-answer\">\r\n          <p>\r\n            Not automatically. Confirm the internal SPD classification, ratings, protection modes, replaceability and coordination limits with the equipment manufacturer. Protection may still be required at the installation origin or distribution board.\r\n          <\/p>\r\n        <\/div>\r\n      <\/details>\r\n\r\n      <details>\r\n        <summary>Can one high-current SPD replace a coordinated protection system?<\/summary>\r\n        <div class=\"sc-faq-answer\">\r\n          <p>\r\n            Not necessarily. A high discharge-current rating only describes part of the device duty. It does not prove that the protective level is low enough at remote equipment or that exposed downstream circuits are covered.\r\n          <\/p>\r\n        <\/div>\r\n      <\/details>\r\n\r\n      <details>\r\n        <summary>What is the most important SPD coordination parameter?<\/summary>\r\n        <div class=\"sc-faq-answer\">\r\n          <p>\r\n            There is no single parameter. Correct coordination depends on SPD test duty, Uc, Up, energy-sharing conditions, conductor arrangement, equipment withstand, earthing system, short-circuit conditions and backup protection.\r\n          <\/p>\r\n        <\/div>\r\n      <\/details>\r\n    <\/div>\r\n  <\/section>\r\n\r\n  <aside class=\"sc-related\">\r\n    <h3>Related Technical Guides<\/h3>\r\n    <ul>\r\n      <li><a href=\"https:\/\/www.cnspd.com\/spd-type1-vs-type2-vs-type-3\/\">Type 1 vs Type 2 vs Type 3 SPD<\/a><\/li>\r\n      <li><a href=\"https:\/\/www.cnspd.com\/iec-60364-5-534-spd-installation\/\">IEC 60364-5-534 SPD Installation Guide<\/a><\/li>\r\n      <li><a href=\"https:\/\/www.cnspd.com\/spd-up-voltage-protection-level\/\">SPD Up Voltage Protection Level Guide<\/a><\/li>\r\n      <li><a href=\"https:\/\/www.cnspd.com\/spd-cable-length-0-5m\/\">SPD Cable Length and the 0.5 m Rule<\/a><\/li>\r\n      <li><a href=\"https:\/\/www.cnspd.com\/spd-sccr-rating\/\">SPD Short-Circuit Current Rating Guide<\/a><\/li>\r\n      <li><a href=\"https:\/\/www.cnspd.com\/ul-1449-vs-iec-61643\/\">UL 1449 vs IEC 61643<\/a><\/li>\r\n    <\/ul>\r\n  <\/aside>\r\n\r\n  <section id=\"references\">\r\n    <h2><span class=\"ez-toc-section\" id=\"references\"><\/span>References<span class=\"ez-toc-section-end\"><\/span><\/h2>\r\n\r\n    <ol class=\"sc-references\">\r\n      <li id=\"ref-1\">\r\n        International Electrotechnical Commission, IEC 61643-12:2020,\r\n        <em>Low-voltage surge protective devices \u2014 Part 12: Surge protective devices connected to low-voltage power systems \u2014 Selection and application principles<\/em>.\r\n        <a href=\"https:\/\/webstore.iec.ch\/en\/publication\/32531\" target=\"_blank\" rel=\"noopener noreferrer\">Official IEC publication page<\/a>.\r\n      <\/li>\r\n\r\n      <li id=\"ref-2\">\r\n        International Electrotechnical Commission, IEC 61643-01:2024 and IEC 61643-11:2025,\r\n        <em>General requirements and test methods for surge protective devices connected to AC low-voltage power systems<\/em>.\r\n        <a href=\"https:\/\/webstore.iec.ch\/en\/publication\/65315\" target=\"_blank\" rel=\"noopener noreferrer\">IEC 61643-01<\/a>;\r\n        <a href=\"https:\/\/webstore.iec.ch\/en\/publication\/65314\" target=\"_blank\" rel=\"noopener noreferrer\">IEC 61643-11<\/a>.\r\n      <\/li>\r\n\r\n      <li id=\"ref-3\">\r\n        International Electrotechnical Commission, IEC 60364-5-53:2019+AMD1:2020+AMD2:2024,\r\n        <em>Low-voltage electrical installations \u2014 Part 5-53: Selection and erection of electrical equipment<\/em>.\r\n        <a href=\"https:\/\/webstore.iec.ch\/en\/publication\/104394\" target=\"_blank\" rel=\"noopener noreferrer\">Official IEC consolidated publication page<\/a>.\r\n      <\/li>\r\n\r\n      <li id=\"ref-4\">\r\n        International Electrotechnical Commission, IEC 62305-4:2024,\r\n        <em>Protection against lightning \u2014 Part 4: Electrical and electronic systems within structures<\/em>.\r\n        <a href=\"https:\/\/webstore.iec.ch\/en\/publication\/29590\" target=\"_blank\" rel=\"noopener noreferrer\">Official IEC publication page<\/a>.\r\n      <\/li>\r\n\r\n      <li id=\"ref-5\">\r\n        Institution of Engineering and Technology,\r\n        <em>Surge Protective Devices (SPDs)<\/em>. Technical guidance covering SPD types, typical locations and coordinated protection.\r\n        <a href=\"https:\/\/electrical.theiet.org\/wiring-matters\/years\/2023\/98-november-2023\/surge-protective-devices-spds\/\" target=\"_blank\" rel=\"noopener noreferrer\">IET technical article<\/a>.\r\n      <\/li>\r\n\r\n      <li id=\"ref-6\">\r\n        Phoenix Contact,\r\n        <em>Fundamentals for Surge Protection<\/em>. Guidance on lightning protection zones, Type 1, Type 2 and Type 3 application positions and coordinated protection concepts.\r\n        <a href=\"https:\/\/www.phoenixcontact.com\/assets\/c8428ddc-254d-40b8-a2f2-540ac13bd818\/index.html\" target=\"_blank\" rel=\"noopener noreferrer\">Official technical guide<\/a>.\r\n      <\/li>\r\n\r\n      <li id=\"ref-7\">\r\n        DEHN,\r\n        <em>Surge Protection in Low-Voltage Switchgear Assemblies<\/em>. Guidance on effective protective level, conductor length and downstream coordinated protection.\r\n        <a href=\"https:\/\/www.dehn-international.com\/sites\/default\/files\/media\/files\/surge-protection-low-voltage-switchgear-assemblies-wpx004-e.pdf\" target=\"_blank\" rel=\"noopener noreferrer\">Official technical document<\/a>.\r\n      <\/li>\r\n\r\n      <li id=\"ref-8\">\r\n        BEAMA,\r\n        <em>Guide to Surge Protection Devices: Selection, Application and Theory<\/em>.\r\n        <a href=\"https:\/\/www.beama.org.uk\/resourceLibrary\/beama-surge-protection-guide-.html\" target=\"_blank\" rel=\"noopener noreferrer\">BEAMA resource page<\/a>.\r\n      <\/li>\r\n\r\n      <li id=\"ref-9\">\r\n        International Electrotechnical Commission, IEC 61643-31:2018 and IEC 61643-32:2017,\r\n        <em>Surge protective devices for photovoltaic installations \u2014 Requirements, selection and application principles<\/em>.\r\n        <a href=\"https:\/\/webstore.iec.ch\/en\/publication\/26931\" target=\"_blank\" rel=\"noopener noreferrer\">IEC 61643-31<\/a>;\r\n        <a href=\"https:\/\/webstore.iec.ch\/en\/publication\/30774\" target=\"_blank\" rel=\"noopener noreferrer\">IEC 61643-32<\/a>.\r\n      <\/li>\r\n\r\n      <li id=\"ref-10\">\r\n        International Electrotechnical Commission, IEC 60364-7-722:2018,\r\n        <em>Low-voltage electrical installations \u2014 Requirements for supplies to electric vehicles<\/em>.\r\n        <a href=\"https:\/\/webstore.iec.ch\/en\/publication\/29958\" target=\"_blank\" rel=\"noopener noreferrer\">Official IEC publication page<\/a>.\r\n      <\/li>\r\n\r\n      <li id=\"ref-11\">\r\n        Schneider Electric, CA903014E, Version 2.7, 2025,\r\n        <em>Coordination of Surge Protective Devices for Commercial and Industrial Buildings<\/em>. Product-specific coordination schedules illustrating that coordination conditions depend on the exact device combination.\r\n        <a href=\"https:\/\/www.se.com\/uk\/en\/download\/document\/CA903014E\/\" target=\"_blank\" rel=\"noopener noreferrer\">Official Schneider Electric document page<\/a>.\r\n      <\/li>\r\n\r\n      <li id=\"ref-12\">\r\n        International Electrotechnical Commission, IEC 60664-1:2020+AMD1:2025,\r\n        <em>Insulation coordination for equipment within low-voltage supply systems \u2014 Part 1: Principles, requirements and tests<\/em>.\r\n        <a href=\"https:\/\/webstore.iec.ch\/en\/publication\/107319\" target=\"_blank\" rel=\"noopener noreferrer\">Official IEC consolidated publication page<\/a>.\r\n      <\/li>\r\n    <\/ol>\r\n\r\n    <p class=\"sc-disclaimer\">\r\n      This article provides general engineering and procurement guidance. The final SPD arrangement must be confirmed against the standards and national rules adopted for the project, the lightning and overvoltage risk assessment, the electrical single-line diagram, equipment manufacturer instructions and model-specific SPD coordination documentation. No coordination distance, model compatibility or certificate scope should be assumed without verification.\r\n    <\/p>\r\n  <\/section>\r\n\r\n  <script>\r\n    document.addEventListener('DOMContentLoaded', function () {\r\n      var popupButtons = document.querySelectorAll(\r\n        '#leeyee-spd-coordination-final .leeyee-site-popup-btn'\r\n      );\r\n\r\n      popupButtons.forEach(function (button) {\r\n        button.addEventListener('click', function () {\r\n          var realPopupTrigger = document.querySelector(\r\n            '.w-popup.ush_popup_1 .w-popup-trigger'\r\n          );\r\n\r\n          if (realPopupTrigger) {\r\n            realPopupTrigger.click();\r\n          } else {\r\n            window.open(\r\n              'https:\/\/www.cnspd.com\/contact\/',\r\n              '_blank',\r\n              'noopener'\r\n            );\r\n          }\r\n        });\r\n      });\r\n    });\r\n  <\/script>\r\n<\/article>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t","protected":false},"excerpt":{"rendered":"<p>Type 1, Type 2 and Type 3 are not three quality grades. They describe different SPD test duties and installation roles. A coordinated surge protection system must decide where each stage belongs, how the stages share surge energy and whether the voltage reaching the final equipment is low enough. Quick Answer One SPD can be&#8230;<\/p>","protected":false},"author":18,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-30462","post","type-post","status-publish","format-standard","hentry","category-news"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.0 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>SPD Coordination: Type 1, Type 2 &amp; Type 3 Guide<\/title>\n<meta name=\"description\" content=\"Learn how Type 1, Type 2 and Type 3 SPDs work together, when one SPD is enough, and how to verify distance, energy coordination and OEM orders.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.cnspd.com\/es\/spd-coordination-type-1-type-2-type-3\/\" \/>\n<meta property=\"og:locale\" content=\"es_ES\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"SPD Coordination: Type 1, Type 2 &amp; Type 3 Guide\" \/>\n<meta property=\"og:description\" content=\"Learn how Type 1, Type 2 and Type 3 SPDs work together, when one SPD is enough, and how to verify distance, energy coordination and OEM orders.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.cnspd.com\/es\/spd-coordination-type-1-type-2-type-3\/\" \/>\n<meta property=\"og:site_name\" content=\"Surge Protector, Surge Arrestor, Isolating Switch - 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