{"id":30319,"date":"2026-07-21T16:49:57","date_gmt":"2026-07-21T08:49:57","guid":{"rendered":"https:\/\/www.cnspd.com\/?p=30319"},"modified":"2026-07-21T16:49:57","modified_gmt":"2026-07-21T08:49:57","slug":"pump-control-panel-spd-selection-guide","status":"publish","type":"post","link":"https:\/\/www.cnspd.com\/de\/pump-control-panel-spd\/","title":{"rendered":"Wahlleitfaden f\u00fcr Pumpensteuerungstafeln SPD"},"content":{"rendered":"\t\t<div data-elementor-type=\"wp-post\" data-elementor-id=\"30319\" class=\"elementor elementor-30319\" data-elementor-post-type=\"post\">\n\t\t\t\t<div class=\"elementor-element elementor-element-2759efa e-flex e-con-boxed e-con e-parent\" data-id=\"2759efa\" 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-1bf7f0d elementor-widget elementor-widget-html\" data-id=\"1bf7f0d\" 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<!--\r\nPAGE: Pump Control Panel SPD Selection Guide\r\nURL: https:\/\/www.cnspd.com\/pump-control-panel-spd\/\r\n\r\nIMPORTANT:\r\nThe WordPress article template already outputs the H1, author, publish date\r\nand modified date above this HTML block.\r\n\r\nThis HTML intentionally contains:\r\n- No H1\r\n- No repeated article title\r\n- No repeated author information\r\n- No repeated publish or modified date\r\n-->\r\n\r\n<style>\r\n:root {\r\n    --pump-blue: #004898;\r\n    --pump-blue-dark: #00366f;\r\n    --pump-blue-light: #eaf3fb;\r\n    --pump-blue-pale: #f6f9fc;\r\n    --pump-orange: #ef7622;\r\n    --pump-green: #17805d;\r\n    --pump-red: #b42318;\r\n    --pump-ink: #142235;\r\n    --pump-text: #39495e;\r\n    --pump-muted: #6a788a;\r\n    --pump-line: #d9e3ed;\r\n    --pump-soft-line: #e9eef4;\r\n    --pump-white: #ffffff;\r\n    --pump-shadow: 0 10px 30px rgba(0, 55, 110, 0.07);\r\n    --pump-radius-lg: 18px;\r\n    --pump-radius-md: 12px;\r\n    --pump-radius-sm: 8px;\r\n}\r\n\r\n.pump-article,\r\n.pump-article *,\r\n.pump-article *::before,\r\n.pump-article *::after {\r\n    box-sizing: border-box;\r\n}\r\n\r\n.pump-article {\r\n    width: 100%;\r\n    margin: 0;\r\n    overflow: hidden;\r\n    background: var(--pump-white);\r\n    color: var(--pump-text);\r\n    font-family: Arial, Helvetica, sans-serif;\r\n    font-size: 17px;\r\n    line-height: 1.72;\r\n    -webkit-font-smoothing: antialiased;\r\n    text-rendering: optimizeLegibility;\r\n}\r\n\r\n.pump-article img {\r\n    display: block;\r\n    max-width: 100%;\r\n    height: auto;\r\n}\r\n\r\n.pump-article a {\r\n    color: var(--pump-blue);\r\n    text-decoration: none;\r\n}\r\n\r\n.pump-article a:hover,\r\n.pump-article a:focus {\r\n    color: var(--pump-blue-dark);\r\n    text-decoration: underline;\r\n    text-underline-offset: 3px;\r\n}\r\n\r\n.pump-article h2,\r\n.pump-article h3,\r\n.pump-article h4 {\r\n    color: var(--pump-ink);\r\n    font-weight: 800;\r\n    line-height: 1.23;\r\n    letter-spacing: -0.02em;\r\n}\r\n\r\n.pump-article h2 {\r\n    margin: 64px 0 20px;\r\n    padding-top: 4px;\r\n    font-size: 32px;\r\n}\r\n\r\n.pump-article h3 {\r\n    margin: 34px 0 13px;\r\n    font-size: 23px;\r\n}\r\n\r\n.pump-article h4 {\r\n    margin: 25px 0 10px;\r\n    font-size: 18px;\r\n}\r\n\r\n.pump-article p {\r\n    margin: 0 0 19px;\r\n}\r\n\r\n.pump-article ul,\r\n.pump-article ol {\r\n    margin: 0 0 22px;\r\n    padding-left: 24px;\r\n}\r\n\r\n.pump-article li {\r\n    margin-bottom: 8px;\r\n}\r\n\r\n.pump-article strong {\r\n    color: var(--pump-ink);\r\n}\r\n\r\n.pump-article sup {\r\n    font-size: 0.72em;\r\n    line-height: 0;\r\n}\r\n\r\n.pump-article sup a {\r\n    font-weight: 800;\r\n}\r\n\r\n.pump-article-container {\r\n    width: min(920px, calc(100% - 48px));\r\n    margin-right: auto;\r\n    margin-left: auto;\r\n}\r\n\r\n.pump-article-body {\r\n    padding: 58px 0 74px;\r\n}\r\n\r\n\/* Opening introduction *\/\r\n.pump-opening {\r\n    margin-bottom: 30px;\r\n}\r\n\r\n.pump-opening p {\r\n    max-width: 850px;\r\n    color: #43546a;\r\n    font-size: 19px;\r\n    line-height: 1.7;\r\n}\r\n\r\n.pump-opening p:last-child {\r\n    margin-bottom: 0;\r\n}\r\n\r\n.pump-scope-note {\r\n    margin: 24px 0 0;\r\n    padding: 16px 19px;\r\n    border-left: 4px solid var(--pump-blue);\r\n    border-radius: 0 var(--pump-radius-sm) var(--pump-radius-sm) 0;\r\n    background: var(--pump-blue-pale);\r\n    color: #46566a;\r\n    font-size: 15px;\r\n    line-height: 1.6;\r\n}\r\n\r\n\/* Quick Answer *\/\r\n.pump-quick-answer {\r\n    margin: 30px 0 28px;\r\n    padding: 27px 29px;\r\n    border: 1px solid #bad2e8;\r\n    border-radius: var(--pump-radius-lg);\r\n    background: linear-gradient(135deg, #f5faff 0%, #ffffff 100%);\r\n    box-shadow: var(--pump-shadow);\r\n}\r\n\r\n.pump-quick-answer h2 {\r\n    margin: 0 0 14px;\r\n    padding: 0;\r\n    font-size: 28px;\r\n}\r\n\r\n.pump-quick-answer > p {\r\n    margin-bottom: 16px;\r\n    font-size: 18px;\r\n}\r\n\r\n.pump-quick-list {\r\n    display: grid;\r\n    grid-template-columns: repeat(2, minmax(0, 1fr));\r\n    gap: 11px 22px;\r\n    margin: 20px 0 0;\r\n    padding: 0;\r\n    list-style: none;\r\n}\r\n\r\n.pump-quick-list li {\r\n    position: relative;\r\n    margin: 0;\r\n    padding-left: 27px;\r\n    color: #34465b;\r\n    line-height: 1.55;\r\n}\r\n\r\n.pump-quick-list li::before {\r\n    position: absolute;\r\n    top: 2px;\r\n    left: 0;\r\n    color: var(--pump-green);\r\n    content: \"\u2713\";\r\n    font-weight: 900;\r\n}\r\n\r\n.pump-quick-cta {\r\n    display: flex;\r\n    gap: 20px;\r\n    align-items: center;\r\n    justify-content: space-between;\r\n    margin-top: 22px;\r\n    padding-top: 19px;\r\n    border-top: 1px solid var(--pump-line);\r\n}\r\n\r\n.pump-quick-cta p {\r\n    max-width: 590px;\r\n    margin: 0;\r\n    color: var(--pump-muted);\r\n    font-size: 15px;\r\n}\r\n\r\n\/* Buttons *\/\r\n.pump-article .leeyee-site-popup-btn,\r\n.pump-article .pump-button {\r\n    min-height: 47px;\r\n    display: inline-flex;\r\n    flex: 0 0 auto;\r\n    align-items: center;\r\n    justify-content: center;\r\n    padding: 12px 19px;\r\n    border: 0;\r\n    border-radius: 8px;\r\n    background: var(--pump-blue) !important;\r\n    box-shadow: 0 8px 18px rgba(0, 72, 152, 0.17);\r\n    color: #ffffff !important;\r\n    font-size: 14px;\r\n    font-weight: 800;\r\n    line-height: 1.2;\r\n    text-align: center;\r\n    text-decoration: none !important;\r\n    cursor: pointer;\r\n    transition:\r\n        background-color 0.2s ease,\r\n        transform 0.2s ease,\r\n        box-shadow 0.2s ease;\r\n}\r\n\r\n.pump-article .leeyee-site-popup-btn:hover,\r\n.pump-article .leeyee-site-popup-btn:focus,\r\n.pump-article .pump-button:hover,\r\n.pump-article .pump-button:focus {\r\n    transform: translateY(-1px);\r\n    background: var(--pump-blue-dark) !important;\r\n    box-shadow: 0 10px 22px rgba(0, 72, 152, 0.22);\r\n}\r\n\r\n.pump-article .leeyee-site-popup-btn > span,\r\n.pump-article .pump-button > span {\r\n    color: #ffffff !important;\r\n    -webkit-text-fill-color: #ffffff !important;\r\n}\r\n\r\n\/* Contents *\/\r\n.pump-contents {\r\n    margin: 28px 0 42px;\r\n    padding: 25px 27px;\r\n    border: 1px solid var(--pump-line);\r\n    border-radius: var(--pump-radius-md);\r\n    background: #ffffff;\r\n}\r\n\r\n.pump-contents h2 {\r\n    margin: 0 0 15px;\r\n    padding: 0;\r\n    font-size: 22px;\r\n}\r\n\r\n.pump-contents ol {\r\n    columns: 2;\r\n    column-gap: 50px;\r\n    margin: 0;\r\n    padding-left: 22px;\r\n}\r\n\r\n.pump-contents li {\r\n    break-inside: avoid;\r\n    margin-bottom: 9px;\r\n    color: var(--pump-muted);\r\n    font-size: 15px;\r\n}\r\n\r\n.pump-contents a {\r\n    color: var(--pump-text);\r\n    font-weight: 700;\r\n}\r\n\r\n\/* Notes *\/\r\n.pump-note,\r\n.pump-warning,\r\n.pump-good {\r\n    margin: 26px 0;\r\n    padding: 21px 23px;\r\n    border-radius: var(--pump-radius-md);\r\n}\r\n\r\n.pump-note {\r\n    border: 1px solid #bfd6e9;\r\n    border-left: 5px solid var(--pump-blue);\r\n    background: #f4f9fd;\r\n}\r\n\r\n.pump-warning {\r\n    border: 1px solid #efc2bd;\r\n    border-left: 5px solid var(--pump-red);\r\n    background: #fff6f5;\r\n}\r\n\r\n.pump-good {\r\n    border: 1px solid #b9ddcf;\r\n    border-left: 5px solid var(--pump-green);\r\n    background: #f3faf7;\r\n}\r\n\r\n.pump-note h3,\r\n.pump-warning h3,\r\n.pump-good h3 {\r\n    margin: 0 0 8px;\r\n    font-size: 20px;\r\n}\r\n\r\n.pump-note p:last-child,\r\n.pump-warning p:last-child,\r\n.pump-good p:last-child {\r\n    margin-bottom: 0;\r\n}\r\n\r\n\/* Figures *\/\r\n.pump-figure {\r\n    margin: 34px 0 38px;\r\n}\r\n\r\n.pump-figure-frame {\r\n    overflow: hidden;\r\n    border: 1px solid #cad8e5;\r\n    border-radius: var(--pump-radius-lg);\r\n    background: #ffffff;\r\n    box-shadow: var(--pump-shadow);\r\n}\r\n\r\n.pump-figure-link {\r\n    display: block;\r\n    padding: 10px;\r\n    background: #f2f7fb;\r\n}\r\n\r\n.pump-figure img {\r\n    width: 100%;\r\n    border-radius: 11px;\r\n    background: #ffffff;\r\n}\r\n\r\n.pump-figure figcaption {\r\n    padding: 15px 19px 17px;\r\n    border-top: 1px solid var(--pump-line);\r\n    color: var(--pump-muted);\r\n    font-size: 14px;\r\n    line-height: 1.55;\r\n}\r\n\r\n.pump-figure figcaption strong {\r\n    display: block;\r\n    margin-bottom: 3px;\r\n}\r\n\r\n\/* Article content boxes *\/\r\n.pump-two-column {\r\n    display: grid;\r\n    grid-template-columns: repeat(2, minmax(0, 1fr));\r\n    gap: 20px;\r\n    margin: 26px 0;\r\n}\r\n\r\n.pump-text-box {\r\n    padding: 22px;\r\n    border: 1px solid var(--pump-line);\r\n    border-radius: var(--pump-radius-md);\r\n    background: #ffffff;\r\n}\r\n\r\n.pump-text-box h3 {\r\n    margin: 0 0 10px;\r\n    font-size: 20px;\r\n}\r\n\r\n.pump-text-box p:last-child,\r\n.pump-text-box ul:last-child {\r\n    margin-bottom: 0;\r\n}\r\n\r\n.pump-check-list,\r\n.pump-cross-list {\r\n    margin: 0;\r\n    padding: 0;\r\n    list-style: none;\r\n}\r\n\r\n.pump-check-list li,\r\n.pump-cross-list li {\r\n    position: relative;\r\n    margin: 0;\r\n    padding: 8px 0 8px 27px;\r\n    border-bottom: 1px solid var(--pump-soft-line);\r\n    line-height: 1.5;\r\n}\r\n\r\n.pump-check-list li:last-child,\r\n.pump-cross-list li:last-child {\r\n    border-bottom: 0;\r\n}\r\n\r\n.pump-check-list li::before {\r\n    position: absolute;\r\n    top: 9px;\r\n    left: 0;\r\n    color: var(--pump-green);\r\n    content: \"\u2713\";\r\n    font-weight: 900;\r\n}\r\n\r\n.pump-cross-list li::before {\r\n    position: absolute;\r\n    top: 9px;\r\n    left: 1px;\r\n    color: var(--pump-red);\r\n    content: \"\u00d7\";\r\n    font-size: 19px;\r\n    font-weight: 900;\r\n    line-height: 1;\r\n}\r\n\r\n\/* Tables *\/\r\n.pump-table-wrap {\r\n    margin: 30px 0;\r\n}\r\n\r\n.pump-table {\r\n    width: 100%;\r\n    border-collapse: separate;\r\n    border-spacing: 0;\r\n    overflow: hidden;\r\n    border: 1px solid var(--pump-line);\r\n    border-radius: var(--pump-radius-md);\r\n    background: #ffffff;\r\n    font-size: 14px;\r\n    line-height: 1.5;\r\n}\r\n\r\n.pump-table thead th {\r\n    padding: 14px 15px;\r\n    border-right: 1px solid rgba(255, 255, 255, 0.18);\r\n    background: var(--pump-blue);\r\n    color: #ffffff;\r\n    font-weight: 800;\r\n    text-align: left;\r\n    vertical-align: top;\r\n}\r\n\r\n.pump-table thead th:last-child {\r\n    border-right: 0;\r\n}\r\n\r\n.pump-table tbody th,\r\n.pump-table tbody td {\r\n    padding: 14px 15px;\r\n    border-right: 1px solid var(--pump-line);\r\n    border-bottom: 1px solid var(--pump-line);\r\n    text-align: left;\r\n    vertical-align: top;\r\n}\r\n\r\n.pump-table tbody th {\r\n    width: 22%;\r\n    background: #f5f8fb;\r\n    color: var(--pump-ink);\r\n    font-weight: 800;\r\n}\r\n\r\n.pump-table tbody td:last-child,\r\n.pump-table tbody th:last-child {\r\n    border-right: 0;\r\n}\r\n\r\n.pump-table tbody tr:last-child th,\r\n.pump-table tbody tr:last-child td {\r\n    border-bottom: 0;\r\n}\r\n\r\n.pump-table-note {\r\n    margin-top: 9px;\r\n    color: var(--pump-muted);\r\n    font-size: 13px;\r\n}\r\n\r\n\/* Embedded B2B evidence *\/\r\n.pump-inline-evidence {\r\n    margin: 29px 0;\r\n    padding: 25px 27px;\r\n    border: 1px solid var(--pump-line);\r\n    border-radius: var(--pump-radius-lg);\r\n    background: var(--pump-blue-pale);\r\n}\r\n\r\n.pump-inline-evidence-row {\r\n    display: grid;\r\n    grid-template-columns: 175px minmax(0, 1fr);\r\n    gap: 24px;\r\n    align-items: start;\r\n    padding: 20px 0;\r\n    border-bottom: 1px solid #d8e4ee;\r\n}\r\n\r\n.pump-inline-evidence-row:first-child {\r\n    padding-top: 0;\r\n}\r\n\r\n.pump-inline-evidence-row:last-child {\r\n    padding-bottom: 0;\r\n    border-bottom: 0;\r\n}\r\n\r\n.pump-inline-evidence-label {\r\n    color: var(--pump-blue);\r\n    font-size: 14px;\r\n    font-weight: 900;\r\n    line-height: 1.45;\r\n}\r\n\r\n.pump-inline-evidence-row p {\r\n    margin-bottom: 9px;\r\n}\r\n\r\n.pump-inline-evidence-row p:last-child {\r\n    margin-bottom: 0;\r\n}\r\n\r\n.pump-inline-evidence-links {\r\n    display: flex;\r\n    flex-wrap: wrap;\r\n    gap: 8px 18px;\r\n    margin-top: 10px;\r\n    font-size: 14px;\r\n    font-weight: 700;\r\n}\r\n\r\n\/* Related links *\/\r\n.pump-related {\r\n    margin: 44px 0 0;\r\n    padding: 25px 27px;\r\n    border: 1px solid var(--pump-line);\r\n    border-radius: var(--pump-radius-lg);\r\n    background: #ffffff;\r\n}\r\n\r\n.pump-related h2 {\r\n    margin: 0 0 10px;\r\n    padding: 0;\r\n    font-size: 25px;\r\n}\r\n\r\n.pump-related > p {\r\n    color: var(--pump-muted);\r\n    font-size: 15px;\r\n}\r\n\r\n.pump-related-list {\r\n    display: grid;\r\n    grid-template-columns: repeat(2, minmax(0, 1fr));\r\n    gap: 13px 24px;\r\n    margin: 20px 0 0;\r\n    padding: 0;\r\n    list-style: none;\r\n}\r\n\r\n.pump-related-list li {\r\n    margin: 0;\r\n    padding: 0;\r\n}\r\n\r\n.pump-related-list a {\r\n    display: block;\r\n    color: var(--pump-ink);\r\n    font-weight: 800;\r\n}\r\n\r\n.pump-related-list span {\r\n    display: block;\r\n    margin-top: 3px;\r\n    color: var(--pump-muted);\r\n    font-size: 14px;\r\n    line-height: 1.5;\r\n}\r\n\r\n\/* FAQ *\/\r\n.pump-faq-list {\r\n    display: grid;\r\n    gap: 11px;\r\n    margin-top: 24px;\r\n}\r\n\r\n.pump-faq {\r\n    overflow: hidden;\r\n    border: 1px solid var(--pump-line);\r\n    border-radius: var(--pump-radius-md);\r\n    background: #ffffff;\r\n}\r\n\r\n.pump-faq summary {\r\n    position: relative;\r\n    padding: 18px 53px 18px 19px;\r\n    color: var(--pump-ink);\r\n    font-size: 16px;\r\n    font-weight: 800;\r\n    line-height: 1.45;\r\n    cursor: pointer;\r\n    list-style: none;\r\n}\r\n\r\n.pump-faq summary::-webkit-details-marker {\r\n    display: none;\r\n}\r\n\r\n.pump-faq summary::after {\r\n    position: absolute;\r\n    top: 50%;\r\n    right: 18px;\r\n    width: 27px;\r\n    height: 27px;\r\n    display: grid;\r\n    place-items: center;\r\n    transform: translateY(-50%);\r\n    border-radius: 50%;\r\n    background: var(--pump-blue-light);\r\n    color: var(--pump-blue);\r\n    content: \"+\";\r\n    font-size: 19px;\r\n    font-weight: 900;\r\n}\r\n\r\n.pump-faq[open] summary::after {\r\n    content: \"\u2212\";\r\n}\r\n\r\n.pump-faq-answer {\r\n    padding: 0 19px 18px;\r\n}\r\n\r\n.pump-faq-answer p:last-child {\r\n    margin-bottom: 0;\r\n}\r\n\r\n\/* Final lightweight CTA *\/\r\n.pump-final-cta {\r\n    margin: 48px 0;\r\n    padding: 28px 30px;\r\n    border: 1px solid #bcd2e7;\r\n    border-radius: var(--pump-radius-lg);\r\n    background: linear-gradient(135deg, #f4f9fd 0%, #ffffff 100%);\r\n}\r\n\r\n.pump-final-cta h2 {\r\n    margin: 0 0 11px;\r\n    padding: 0;\r\n    font-size: 27px;\r\n}\r\n\r\n.pump-final-cta p {\r\n    max-width: 720px;\r\n    margin-bottom: 19px;\r\n}\r\n\r\n.pump-brand-note {\r\n    margin-top: 22px;\r\n    padding-top: 18px;\r\n    border-top: 1px solid var(--pump-line);\r\n    color: var(--pump-muted);\r\n    font-size: 14px;\r\n    line-height: 1.6;\r\n}\r\n\r\n.pump-brand-slogan {\r\n    display: block;\r\n    margin-top: 8px;\r\n    color: var(--pump-blue);\r\n    font-size: 17px;\r\n    font-weight: 900;\r\n}\r\n\r\n\/* References *\/\r\n.pump-references {\r\n    margin: 0;\r\n    padding-left: 22px;\r\n}\r\n\r\n.pump-references li {\r\n    margin-bottom: 11px;\r\n    color: var(--pump-muted);\r\n    font-size: 14px;\r\n    line-height: 1.62;\r\n}\r\n\r\n.pump-references a {\r\n    font-weight: 700;\r\n    text-decoration: underline;\r\n    text-decoration-thickness: 1px;\r\n    text-underline-offset: 2px;\r\n}\r\n\r\n.pump-article a:focus-visible,\r\n.pump-article summary:focus-visible {\r\n    outline: 3px solid rgba(239, 118, 34, 0.7);\r\n    outline-offset: 3px;\r\n}\r\n\r\n@media (prefers-reduced-motion: reduce) {\r\n    .pump-article *,\r\n    .pump-article *::before,\r\n    .pump-article *::after {\r\n        transition: none !important;\r\n        scroll-behavior: auto !important;\r\n    }\r\n}\r\n\r\n\/* Desktop 1440 *\/\r\n@media (max-width: 1440px) {\r\n    .pump-article-container {\r\n        width: min(920px, calc(100% - 46px));\r\n    }\r\n}\r\n\r\n\/* Desktop 1366 *\/\r\n@media (max-width: 1366px) {\r\n    .pump-article {\r\n        font-size: 16.5px;\r\n    }\r\n}\r\n\r\n\/* Desktop 1280 *\/\r\n@media (max-width: 1280px) {\r\n    .pump-article-container {\r\n        width: min(900px, calc(100% - 42px));\r\n    }\r\n}\r\n\r\n\/* Tablet 1024 *\/\r\n@media (max-width: 1024px) {\r\n    .pump-article-container {\r\n        width: min(880px, calc(100% - 38px));\r\n    }\r\n\r\n    .pump-article h2 {\r\n        margin-top: 58px;\r\n    }\r\n\r\n    .pump-quick-list {\r\n        grid-template-columns: minmax(0, 1fr);\r\n    }\r\n}\r\n\r\n\/* Tablet 912 *\/\r\n@media (max-width: 912px) {\r\n    .pump-article-container {\r\n        width: calc(100% - 34px);\r\n    }\r\n\r\n    .pump-opening p {\r\n        font-size: 18px;\r\n    }\r\n}\r\n\r\n\/* Tablet 820 *\/\r\n@media (max-width: 820px) {\r\n    .pump-article {\r\n        font-size: 16px;\r\n    }\r\n\r\n    .pump-article h2 {\r\n        font-size: 30px;\r\n    }\r\n\r\n    .pump-two-column {\r\n        grid-template-columns: minmax(0, 1fr);\r\n    }\r\n\r\n    .pump-contents ol {\r\n        columns: 1;\r\n    }\r\n\r\n    .pump-related-list {\r\n        grid-template-columns: minmax(0, 1fr);\r\n    }\r\n}\r\n\r\n\/* Tablet 768 *\/\r\n@media (max-width: 768px) {\r\n    .pump-article-container {\r\n        width: calc(100% - 30px);\r\n    }\r\n\r\n    .pump-article-body {\r\n        padding-top: 44px;\r\n    }\r\n\r\n    .pump-quick-answer {\r\n        padding: 24px;\r\n    }\r\n\r\n    .pump-quick-cta {\r\n        align-items: flex-start;\r\n        flex-direction: column;\r\n    }\r\n\r\n    .pump-inline-evidence-row {\r\n        grid-template-columns: minmax(0, 1fr);\r\n        gap: 8px;\r\n    }\r\n\r\n    .pump-inline-evidence-label {\r\n        font-size: 13px;\r\n    }\r\n\r\n    \/*\r\n    Tables become stacked cards on mobile.\r\n    No horizontal scrolling is required.\r\n    *\/\r\n    .pump-table,\r\n    .pump-table thead,\r\n    .pump-table tbody,\r\n    .pump-table tr,\r\n    .pump-table th,\r\n    .pump-table td {\r\n        display: block;\r\n        width: 100%;\r\n    }\r\n\r\n    .pump-table {\r\n        border: 0;\r\n        border-radius: 0;\r\n        background: transparent;\r\n    }\r\n\r\n    .pump-table 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        clip-path: inset(50%);\r\n        white-space: nowrap;\r\n    }\r\n\r\n    .pump-table tbody tr {\r\n        margin-bottom: 15px;\r\n        overflow: hidden;\r\n        border: 1px solid var(--pump-line);\r\n        border-radius: var(--pump-radius-md);\r\n        background: #ffffff;\r\n        box-shadow: 0 6px 18px rgba(0, 55, 110, 0.045);\r\n    }\r\n\r\n    .pump-table tbody th {\r\n        position: static;\r\n        width: 100%;\r\n        padding: 15px 17px;\r\n        border: 0;\r\n        background: var(--pump-blue);\r\n        color: #ffffff;\r\n        font-size: 16px;\r\n    }\r\n\r\n    .pump-table tbody td {\r\n        display: grid;\r\n        grid-template-columns: minmax(112px, 34%) minmax(0, 1fr);\r\n        gap: 12px;\r\n        padding: 13px 16px;\r\n        border-right: 0;\r\n        border-bottom: 1px solid var(--pump-soft-line);\r\n    }\r\n\r\n    .pump-table tbody td:last-child {\r\n        border-bottom: 0;\r\n    }\r\n\r\n    .pump-table tbody td::before {\r\n        color: var(--pump-blue);\r\n        content: attr(data-label);\r\n        font-size: 12px;\r\n        font-weight: 900;\r\n        line-height: 1.45;\r\n        text-transform: uppercase;\r\n    }\r\n\r\n    .pump-table-note {\r\n        display: none;\r\n    }\r\n}\r\n\r\n\/* Mobile 600 *\/\r\n@media (max-width: 600px) {\r\n    .pump-article-container {\r\n        width: calc(100% - 26px);\r\n    }\r\n\r\n    .pump-article {\r\n        font-size: 15.5px;\r\n        line-height: 1.68;\r\n    }\r\n\r\n    .pump-article-body {\r\n        padding-top: 38px;\r\n        padding-bottom: 62px;\r\n    }\r\n\r\n    .pump-opening p {\r\n        font-size: 17px;\r\n    }\r\n\r\n    .pump-article h2 {\r\n        margin-top: 50px;\r\n        font-size: 28px;\r\n    }\r\n\r\n    .pump-article h3 {\r\n        font-size: 21px;\r\n    }\r\n\r\n    .pump-quick-answer h2 {\r\n        font-size: 25px;\r\n    }\r\n\r\n    .pump-quick-answer > p {\r\n        font-size: 17px;\r\n    }\r\n\r\n    .pump-article .leeyee-site-popup-btn,\r\n    .pump-article .pump-button {\r\n        width: 100%;\r\n    }\r\n\r\n    .pump-contents,\r\n    .pump-inline-evidence,\r\n    .pump-related,\r\n    .pump-final-cta {\r\n        padding: 22px;\r\n    }\r\n\r\n    .pump-figure-link {\r\n        padding: 7px;\r\n    }\r\n\r\n    .pump-figure figcaption {\r\n        padding: 14px 16px 16px;\r\n    }\r\n}\r\n\r\n\/* Mobile 540 *\/\r\n@media (max-width: 540px) {\r\n    .pump-quick-answer {\r\n        padding: 21px;\r\n    }\r\n\r\n    .pump-note,\r\n    .pump-warning,\r\n    .pump-good {\r\n        padding: 19px;\r\n    }\r\n\r\n    .pump-text-box {\r\n        padding: 20px;\r\n    }\r\n}\r\n\r\n\/* Mobile 480 *\/\r\n@media (max-width: 480px) {\r\n    .pump-article-container {\r\n        width: calc(100% - 22px);\r\n    }\r\n\r\n    .pump-article h2 {\r\n        font-size: 27px;\r\n    }\r\n\r\n    .pump-scope-note {\r\n        padding: 14px 16px;\r\n    }\r\n\r\n    .pump-quick-answer,\r\n    .pump-contents,\r\n    .pump-inline-evidence,\r\n    .pump-related,\r\n    .pump-final-cta {\r\n        border-radius: 13px;\r\n    }\r\n\r\n    .pump-table tbody td {\r\n        grid-template-columns: minmax(100px, 36%) minmax(0, 1fr);\r\n        gap: 10px;\r\n        padding: 12px 14px;\r\n    }\r\n}\r\n\r\n\/* Mobile 430 *\/\r\n@media (max-width: 430px) {\r\n    .pump-article {\r\n        font-size: 15px;\r\n    }\r\n\r\n    .pump-opening p {\r\n        font-size: 16.5px;\r\n    }\r\n\r\n    .pump-article h2 {\r\n        margin-top: 46px;\r\n        font-size: 26px;\r\n    }\r\n\r\n    .pump-quick-answer {\r\n        padding: 19px;\r\n    }\r\n\r\n    .pump-quick-answer h2 {\r\n        font-size: 23px;\r\n    }\r\n\r\n    .pump-contents,\r\n    .pump-inline-evidence,\r\n    .pump-related,\r\n    .pump-final-cta {\r\n        padding: 19px;\r\n    }\r\n}\r\n\r\n\/* Mobile 414 *\/\r\n@media (max-width: 414px) {\r\n    .pump-article-container {\r\n        width: calc(100% - 20px);\r\n    }\r\n\r\n    .pump-final-cta h2 {\r\n        font-size: 24px;\r\n    }\r\n}\r\n\r\n\/* Mobile 390 *\/\r\n@media (max-width: 390px) {\r\n    .pump-article h2 {\r\n        font-size: 25px;\r\n    }\r\n\r\n    .pump-table tbody td {\r\n        display: block;\r\n    }\r\n\r\n    .pump-table tbody td::before {\r\n        display: block;\r\n        margin-bottom: 5px;\r\n    }\r\n\r\n    .pump-article .leeyee-site-popup-btn,\r\n    .pump-article .pump-button {\r\n        min-height: 48px;\r\n        padding: 12px 15px;\r\n        font-size: 13px;\r\n    }\r\n}\r\n\r\n\/* Mobile 375 *\/\r\n@media (max-width: 375px) {\r\n    .pump-article h2 {\r\n        font-size: 24px;\r\n    }\r\n\r\n    .pump-article h3 {\r\n        font-size: 20px;\r\n    }\r\n}\r\n\r\n\/* Mobile 360 *\/\r\n@media (max-width: 360px) {\r\n    .pump-article-container {\r\n        width: calc(100% - 18px);\r\n    }\r\n\r\n    .pump-article {\r\n        font-size: 14.5px;\r\n    }\r\n\r\n    .pump-quick-answer,\r\n    .pump-contents,\r\n    .pump-inline-evidence,\r\n    .pump-related,\r\n    .pump-final-cta {\r\n        padding: 17px;\r\n    }\r\n\r\n    .pump-note,\r\n    .pump-warning,\r\n    .pump-good,\r\n    .pump-text-box {\r\n        padding: 17px;\r\n    }\r\n}\r\n\r\n\/* Mobile 320 *\/\r\n@media (max-width: 320px) {\r\n    .pump-article-container {\r\n        width: calc(100% - 16px);\r\n    }\r\n\r\n    .pump-article h2 {\r\n        font-size: 23px;\r\n    }\r\n\r\n    .pump-opening p {\r\n        font-size: 15.5px;\r\n    }\r\n}\r\n<\/style>\r\n\r\n<article class=\"pump-article\" id=\"pump-control-panel-spd-guide\">\r\n    <div class=\"pump-article-body\">\r\n        <div class=\"pump-article-container\">\r\n\r\n            <!-- INTRODUCTION -->\r\n            <section class=\"pump-opening\" aria-label=\"Article introduction\">\r\n                <p>\r\n                    A pump control panel may need surge protection for more than its\r\n                    three-phase power supply. External level sensors, pressure\r\n                    transmitters, 4\u201320mA loops, RS485 cables and remote communication\r\n                    lines can also carry transient overvoltage into the PLC, VFD and\r\n                    control power supply.\r\n                <\/p>\r\n\r\n                <p>\r\n                    This guide explains how pump-panel manufacturers, water-treatment\r\n                    contractors, municipal project teams, maintenance teams,\r\n                    distributors and OEM buyers can identify the required AC, DC and\r\n                    signal SPD protection points.\r\n                <\/p>\r\n\r\n                <div class=\"pump-scope-note\">\r\n                    <strong>Article scope:<\/strong>\r\n                    This page covers electrical surge protective devices for normal\r\n                    water, wastewater, irrigation, borehole and industrial pump\r\n                    control panels. It does not cover hydraulic water hammer or\r\n                    fire-pump-controller compliance.\r\n                <\/div>\r\n            <\/section>\r\n\r\n            <!-- QUICK ANSWER -->\r\n            <section\r\n                class=\"pump-quick-answer\"\r\n                id=\"quick-answer\"\r\n                aria-labelledby=\"quick-answer-title\"\r\n            >\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\/de\/pump-control-panel-spd\/#quick-answer\" >Quick Answer<\/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\/de\/pump-control-panel-spd\/#contents\" >Contents<\/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\/de\/pump-control-panel-spd\/#why-a-pump-control-panel-may-need-several-spds\" >Why a Pump Control Panel May Need Several SPDs<\/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\/de\/pump-control-panel-spd\/#three-phase-ac-spd-selection\" >Three-Phase AC SPD Selection<\/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\/de\/pump-control-panel-spd\/#spd-protection-for-a-vfd-pump-panel\" >SPD Protection for a VFD Pump Panel<\/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\/de\/pump-control-panel-spd\/#control-power-and-24v-dc-protection\" >Control Power and 24V DC 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\/de\/pump-control-panel-spd\/#level-sensor-and-pressure-sensor-protection\" >Level Sensor and Pressure Sensor Protection<\/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\/de\/pump-control-panel-spd\/#rs485-modbus-ethernet-and-poe-protection\" >RS485, Modbus, Ethernet and PoE Protection<\/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\/de\/pump-control-panel-spd\/#outdoor-pump-station-installation-and-grounding\" >Outdoor Pump Station Installation and Grounding<\/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\/de\/pump-control-panel-spd\/#remote-alarm-and-maintenance\" >Remote Alarm and Maintenance<\/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\/de\/pump-control-panel-spd\/#leeyee-product-directions-and-supplier-evidence\" >LEEYEE Product Directions and Supplier Evidence<\/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\/de\/pump-control-panel-spd\/#pump-control-panel-spd-procurement-checklist\" >Pump Control Panel SPD Procurement Checklist<\/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\/de\/pump-control-panel-spd\/#related-technical-guides\" >Related Technical Guides<\/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\/de\/pump-control-panel-spd\/#frequently-asked-questions\" >Frequently Asked Questions<\/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\/de\/pump-control-panel-spd\/#need-a-pump-panel-spd-configuration\" >Need a Pump-Panel 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\/de\/pump-control-panel-spd\/#references\" >References<\/a><\/li><\/ul><\/nav><\/div>\n<h2 id=\"quick-answer-title\"><span class=\"ez-toc-section\" id=\"quick-answer\"><\/span>\r\n                    Quick Answer\r\n                <span class=\"ez-toc-section-end\"><\/span><\/h2>\r\n\r\n                <p>\r\n                    A typical pump control panel may require several coordinated\r\n                    SPDs. A main AC SPD does not protect a surge that enters through\r\n                    a separate sensor or communication cable.\r\n                <\/p>\r\n\r\n                <ul class=\"pump-quick-list\">\r\n                    <li>\r\n                        Use a Type 2 or Type 1+2 SPD at the three-phase AC entry,\r\n                        depending on the panel position and site risk.\r\n                    <\/li>\r\n\r\n                    <li>\r\n                        Protect the VFD on its incoming supply side.\r\n                    <\/li>\r\n\r\n                    <li>\r\n                        Evaluate auxiliary AC and external 24V DC control circuits\r\n                        separately.\r\n                    <\/li>\r\n\r\n                    <li>\r\n                        Match 4\u201320mA and digital-input SPDs to the actual sensor\r\n                        circuit.\r\n                    <\/li>\r\n\r\n                    <li>\r\n                        Use interface-specific protection for RS485, Modbus,\r\n                        Ethernet or PoE.\r\n                    <\/li>\r\n\r\n                    <li>\r\n                        Install SPDs close to the cable entry and use a short,\r\n                        coordinated bonding path.\r\n                    <\/li>\r\n                <\/ul>\r\n\r\n                <div class=\"pump-quick-cta\">\r\n                    <p>\r\n                        Final model selection requires the supply voltage, earthing\r\n                        system, panel location, signal types and wiring information.\r\n                    <\/p>\r\n\r\n                    <a\r\n                        class=\"leeyee-site-popup-btn pump-button\"\r\n                        href=\"javascript:void(0);\"\r\n                    >\r\n                        <span style=\"color:#ffffff !important;-webkit-text-fill-color:#ffffff !important;\">\r\n                            Ask for an Initial Selection\r\n                        <\/span>\r\n                    <\/a>\r\n                <\/div>\r\n            <\/section>\r\n\r\n            <!-- CONTENTS -->\r\n            <nav class=\"pump-contents\" aria-label=\"Article contents\">\r\n                <h2><span class=\"ez-toc-section\" id=\"contents\"><\/span>Contents<span class=\"ez-toc-section-end\"><\/span><\/h2>\r\n\r\n                <ol>\r\n                    <li>\r\n                        <a href=\"#why-multiple-spds\">\r\n                            Why one panel may need several SPDs\r\n                        <\/a>\r\n                    <\/li>\r\n\r\n                    <li>\r\n                        <a href=\"#three-phase-ac\">\r\n                            Three-phase AC SPD selection\r\n                        <\/a>\r\n                    <\/li>\r\n\r\n                    <li>\r\n                        <a href=\"#vfd-protection\">\r\n                            VFD input protection\r\n                        <\/a>\r\n                    <\/li>\r\n\r\n                    <li>\r\n                        <a href=\"#control-power\">\r\n                            Control power and 24V DC\r\n                        <\/a>\r\n                    <\/li>\r\n\r\n                    <li>\r\n                        <a href=\"#sensor-protection\">\r\n                            Level and pressure sensors\r\n                        <\/a>\r\n                    <\/li>\r\n\r\n                    <li>\r\n                        <a href=\"#communication-lines\">\r\n                            RS485 and communication lines\r\n                        <\/a>\r\n                    <\/li>\r\n\r\n                    <li>\r\n                        <a href=\"#outdoor-installation\">\r\n                            Outdoor installation and grounding\r\n                        <\/a>\r\n                    <\/li>\r\n\r\n                    <li>\r\n                        <a href=\"#remote-alarm\">\r\n                            Remote alarm and maintenance\r\n                        <\/a>\r\n                    <\/li>\r\n\r\n                    <li>\r\n                        <a href=\"#leeyee-evidence\">\r\n                            LEEYEE product and supplier evidence\r\n                        <\/a>\r\n                    <\/li>\r\n\r\n                    <li>\r\n                        <a href=\"#procurement-checklist\">\r\n                            Procurement checklist\r\n                        <\/a>\r\n                    <\/li>\r\n\r\n                    <li>\r\n                        <a href=\"#faq\">\r\n                            Frequently asked questions\r\n                        <\/a>\r\n                    <\/li>\r\n                <\/ol>\r\n            <\/nav>\r\n\r\n            <!-- WHY MULTIPLE SPDS -->\r\n            <section id=\"why-multiple-spds\">\r\n                <h2><span class=\"ez-toc-section\" id=\"why-a-pump-control-panel-may-need-several-spds\"><\/span>\r\n                    Why a Pump Control Panel May Need Several SPDs\r\n                <span class=\"ez-toc-section-end\"><\/span><\/h2>\r\n\r\n                <p>\r\n                    Pump control panels are often installed in remote or electrically\r\n                    exposed locations.\r\n                <\/p>\r\n\r\n                <p>\r\n                    Typical applications include wastewater lift stations,\r\n                    irrigation sites, boreholes, reservoirs, water-treatment systems\r\n                    and outdoor municipal pumping stations.\r\n                <\/p>\r\n\r\n                <p>\r\n                    These panels may contain a PLC, VFD, HMI, control transformer,\r\n                    24V DC power supply, remote I\/O and communication equipment.\r\n                <\/p>\r\n\r\n                <p>\r\n                    A transient can enter through the main power supply. It can also\r\n                    enter through an external sensor, control or data cable.\r\n                <\/p>\r\n\r\n                <p>\r\n                    Complete protection therefore follows every conductive path that\r\n                    enters or leaves the cabinet. Power, data and signal SPDs must\r\n                    also use a coordinated bonding arrangement.\r\n                    <sup><a href=\"#reference-4\">[4]<\/a><\/sup>\r\n                <\/p>\r\n\r\n                <figure class=\"pump-figure\">\r\n                    <div class=\"pump-figure-frame\">\r\n                        <a\r\n                            class=\"pump-figure-link\"\r\n                            href=\"https:\/\/www.cnspd.com\/wp-content\/uploads\/2026\/07\/pump-control-panel-surge-protection-architecture.webp\"\r\n                            target=\"_blank\"\r\n                            rel=\"noopener\"\r\n                            aria-label=\"Open the pump control panel surge protection architecture diagram\"\r\n                        >\r\n                            <img fetchpriority=\"high\"\r\n                                src=\"https:\/\/www.cnspd.com\/wp-content\/uploads\/2026\/07\/pump-control-panel-surge-protection-architecture.webp\"\r\n                                width=\"1448\"\r\n                                height=\"1086\"\r\n                                loading=\"eager\"\r\n                                fetchpriority=\"high\"\r\n                                decoding=\"async\"\r\n                                alt=\"Complete pump control panel surge protection architecture with three-phase AC, VFD, PLC, 4-20mA sensors and RS485 lines\"\r\n                            \/>\r\n                        <\/a>\r\n\r\n                        <figcaption>\r\n                            <strong>\r\n                                Pump control panel surge protection architecture\r\n                            <\/strong>\r\n                            The diagram separates the three-phase supply, VFD input,\r\n                            control power, 24V DC, sensor and communication protection\r\n                            points.\r\n                        <\/figcaption>\r\n                    <\/div>\r\n                <\/figure>\r\n\r\n                <div class=\"pump-two-column\">\r\n                    <div class=\"pump-text-box\">\r\n                        <h3>Power entry paths<\/h3>\r\n\r\n                        <ul class=\"pump-check-list\">\r\n                            <li>Utility or generator supply<\/li>\r\n                            <li>ATS or changeover circuit<\/li>\r\n                            <li>Three-phase incomer<\/li>\r\n                            <li>Control transformer<\/li>\r\n                            <li>Separate auxiliary supply<\/li>\r\n                        <\/ul>\r\n                    <\/div>\r\n\r\n                    <div class=\"pump-text-box\">\r\n                        <h3>Field entry paths<\/h3>\r\n\r\n                        <ul class=\"pump-check-list\">\r\n                            <li>Level and pressure transmitters<\/li>\r\n                            <li>Float switches and digital inputs<\/li>\r\n                            <li>Flow meters and remote I\/O<\/li>\r\n                            <li>RS485 and Modbus cables<\/li>\r\n                            <li>Ethernet, PoE or radio connections<\/li>\r\n                        <\/ul>\r\n                    <\/div>\r\n                <\/div>\r\n            <\/section>\r\n\r\n            <!-- THREE-PHASE AC -->\r\n            <section id=\"three-phase-ac\">\r\n                <h2><span class=\"ez-toc-section\" id=\"three-phase-ac-spd-selection\"><\/span>\r\n                    Three-Phase AC SPD Selection\r\n                <span class=\"ez-toc-section-end\"><\/span><\/h2>\r\n\r\n                <p>\r\n                    Do not select the SPD only from the pump motor kilowatt or\r\n                    horsepower rating.\r\n                <\/p>\r\n\r\n                <p>\r\n                    Pump power affects the breaker, contactor, VFD and cable design.\r\n                    It does not, by itself, determine the correct Uc, Up, pole\r\n                    arrangement, protection mode or discharge-current rating.\r\n                <\/p>\r\n\r\n                <p>\r\n                    IEC 61643-11:2025 covers SPDs connected to AC low-voltage power\r\n                    systems and defines their performance, safety, rating and test\r\n                    requirements.\r\n                    <sup><a href=\"#reference-1\">[1]<\/a><\/sup>\r\n                <\/p>\r\n\r\n                <h3>Information to confirm first<\/h3>\r\n\r\n                <ul>\r\n                    <li>Nominal line-to-line voltage<\/li>\r\n                    <li>Line-to-neutral voltage, if neutral is present<\/li>\r\n                    <li>Three-wire or four-wire supply<\/li>\r\n                    <li>TN-S, TN-C-S, TT, IT or delta arrangement<\/li>\r\n                    <li>Panel position in the distribution system<\/li>\r\n                    <li>Overhead or underground incoming supply<\/li>\r\n                    <li>External lightning protection system<\/li>\r\n                    <li>Upstream SPD type and location<\/li>\r\n                    <li>Prospective short-circuit current<\/li>\r\n                    <li>Required backup fuse or circuit breaker<\/li>\r\n                <\/ul>\r\n\r\n                <div class=\"pump-two-column\">\r\n                    <div class=\"pump-text-box\">\r\n                        <h3>Type 2 SPD<\/h3>\r\n\r\n                        <p>\r\n                            A Type 2 SPD is commonly evaluated at a downstream pump\r\n                            control panel where coordinated protection is already\r\n                            installed at an upstream distribution board.\r\n                        <\/p>\r\n\r\n                        <p>\r\n                            It is used to limit residual lightning-induced surges and\r\n                            switching transients before they reach the VFD and control\r\n                            electronics.\r\n                        <\/p>\r\n                    <\/div>\r\n\r\n                    <div class=\"pump-text-box\">\r\n                        <h3>Type 1+2 SPD<\/h3>\r\n\r\n                        <p>\r\n                            A Type 1+2 SPD may need evaluation where the pump cabinet\r\n                            is located at an exposed incoming position, connected to\r\n                            an overhead supply or placed at a lightning-protection\r\n                            zone boundary.\r\n                        <\/p>\r\n\r\n                        <p>\r\n                            An outdoor enclosure alone does not automatically require\r\n                            a Type 1+2 SPD.\r\n                        <\/p>\r\n                    <\/div>\r\n                <\/div>\r\n\r\n                <div class=\"pump-note\">\r\n                    <h3>\r\n                        Do not select 3P, 3P+N or 4P from a photograph\r\n                    <\/h3>\r\n\r\n                    <p>\r\n                        The correct pole arrangement depends on whether neutral enters\r\n                        the cabinet, how the loads are connected, the earthing system\r\n                        and the required protection modes.\r\n                    <\/p>\r\n                <\/div>\r\n            <\/section>\r\n\r\n            <!-- VFD -->\r\n            <section id=\"vfd-protection\">\r\n                <h2><span class=\"ez-toc-section\" id=\"spd-protection-for-a-vfd-pump-panel\"><\/span>\r\n                    SPD Protection for a VFD Pump Panel\r\n                <span class=\"ez-toc-section-end\"><\/span><\/h2>\r\n\r\n                <p>\r\n                    The normal AC surge-protection position is on the incoming side\r\n                    of the VFD.\r\n                <\/p>\r\n\r\n                <p>\r\n                    The SPD may be installed at the pump-panel incomer, at the VFD\r\n                    input distribution point or at a coordinated upstream board.\r\n                <\/p>\r\n\r\n                <p>\r\n                    The objective is to limit incoming transient overvoltage before\r\n                    it reaches the VFD rectifier, DC bus and control electronics.\r\n                <\/p>\r\n\r\n                <div class=\"pump-warning\">\r\n                    <h3>\r\n                        Do not treat the VFD output as normal mains power\r\n                    <\/h3>\r\n\r\n                    <p>\r\n                        A VFD output is a switched PWM waveform. Long motor cables and\r\n                        fast switching can create high dU\/dt stress at the motor\r\n                        terminals.\r\n                    <\/p>\r\n\r\n                    <p>\r\n                        Drive-approved dU\/dt filters, sine-wave filters, output\r\n                        reactors, suitable motor cables and inverter-duty motors are\r\n                        used to manage this type of stress.\r\n                        <sup><a href=\"#reference-5\">[5]<\/a><\/sup>\r\n                    <\/p>\r\n\r\n                    <p>\r\n                        Do not connect a standard AC distribution SPD directly to a\r\n                        VFD output unless the VFD manufacturer and SPD manufacturer\r\n                        approve that exact application.\r\n                    <\/p>\r\n                <\/div>\r\n            <\/section>\r\n\r\n            <!-- CONTROL POWER -->\r\n            <section id=\"control-power\">\r\n                <h2><span class=\"ez-toc-section\" id=\"control-power-and-24v-dc-protection\"><\/span>\r\n                    Control Power and 24V DC Protection\r\n                <span class=\"ez-toc-section-end\"><\/span><\/h2>\r\n\r\n                <p>\r\n                    A pump control panel may contain several voltage levels.\r\n                <\/p>\r\n\r\n                <p>\r\n                    A typical panel may use 380V, 400V, 415V or 480V three-phase\r\n                    power, 110V or 230V AC control power and 24V DC for the PLC,\r\n                    sensors and relays.\r\n                <\/p>\r\n\r\n                <p>\r\n                    These circuits should not be treated as one protection point.\r\n                <\/p>\r\n\r\n                <h3>AC control power<\/h3>\r\n\r\n                <p>\r\n                    Where the control transformer or auxiliary supply is connected\r\n                    to an exposed circuit, use an AC SPD matched to the actual\r\n                    control voltage and wiring arrangement.\r\n                <\/p>\r\n\r\n                <p>\r\n                    Confirm whether protection is required on the transformer primary,\r\n                    transformer secondary or a separate auxiliary input.\r\n                <\/p>\r\n\r\n                <h3>24V DC control circuits<\/h3>\r\n\r\n                <p>\r\n                    A low-voltage DC SPD must tolerate the normal operating voltage\r\n                    without conducting during expected supply variation.\r\n                <\/p>\r\n\r\n                <p>\r\n                    Confirm the maximum DC voltage, circuit current, conductor\r\n                    arrangement, grounding method and acceptable voltage drop.\r\n                <\/p>\r\n\r\n                <div class=\"pump-note\">\r\n                    <h3>\r\n                        Do not use a mains AC SPD on a 24V DC circuit\r\n                    <\/h3>\r\n\r\n                    <p>\r\n                        A device for a three-phase or single-phase AC supply is not a\r\n                        substitute for a low-voltage control or signal SPD.\r\n                    <\/p>\r\n                <\/div>\r\n            <\/section>\r\n\r\n            <!-- SENSOR PROTECTION -->\r\n            <section id=\"sensor-protection\">\r\n                <h2><span class=\"ez-toc-section\" id=\"level-sensor-and-pressure-sensor-protection\"><\/span>\r\n                    Level Sensor and Pressure Sensor Protection\r\n                <span class=\"ez-toc-section-end\"><\/span><\/h2>\r\n\r\n                <p>\r\n                    External field instruments are among the most important\r\n                    protection points in a pump station.\r\n                <\/p>\r\n\r\n                <p>\r\n                    Common field devices include hydrostatic level transmitters,\r\n                    ultrasonic sensors, pressure transmitters, flow meters, float\r\n                    switches and high-level alarms.\r\n                <\/p>\r\n\r\n                <p>\r\n                    The correct SPD depends on the electrical interface, not only the\r\n                    name of the instrument.\r\n                <\/p>\r\n\r\n                <h3>4\u201320mA transmitters<\/h3>\r\n\r\n                <p>\r\n                    For a 4\u201320mA loop, confirm whether the transmitter is two-wire or\r\n                    four-wire.\r\n                <\/p>\r\n\r\n                <p>\r\n                    Also confirm the loop voltage, permitted series resistance,\r\n                    voltage drop, conductor count, grounding method and any HART or\r\n                    hazardous-area requirement.\r\n                <\/p>\r\n\r\n                <p>\r\n                    Excessive series resistance can reduce the voltage available to\r\n                    the transmitter.\r\n                <\/p>\r\n\r\n                <p>\r\n                    The SPD must protect the loop without preventing normal operation.\r\n                <\/p>\r\n\r\n                <h3>Float switches and digital inputs<\/h3>\r\n\r\n                <p>\r\n                    A float switch may use a dry contact, 24V DC input, AC control\r\n                    circuit or proprietary controller connection.\r\n                <\/p>\r\n\r\n                <p>\r\n                    Confirm the circuit voltage before choosing the signal SPD.\r\n                <\/p>\r\n\r\n                <p>\r\n                    A product for a low-voltage PLC input may not be suitable for a\r\n                    110V or 230V AC float-switch circuit.\r\n                <\/p>\r\n            <\/section>\r\n\r\n            <!-- COMMUNICATION -->\r\n            <section id=\"communication-lines\">\r\n                <h2><span class=\"ez-toc-section\" id=\"rs485-modbus-ethernet-and-poe-protection\"><\/span>\r\n                    RS485, Modbus, Ethernet and PoE Protection\r\n                <span class=\"ez-toc-section-end\"><\/span><\/h2>\r\n\r\n                <p>\r\n                    Pump stations often use RS485 or Modbus RTU to connect VFDs,\r\n                    remote I\/O, flow meters, level controllers and SCADA gateways.\r\n                <\/p>\r\n\r\n                <p>\r\n                    The signal SPD must match the interface voltage, conductor\r\n                    arrangement, data rate, capacitance, shielding and grounding\r\n                    method.\r\n                <\/p>\r\n\r\n                <p>\r\n                    IEC 61643-21:2025 applies to SPDs connected to telecommunications\r\n                    and signalling networks.\r\n                <\/p>\r\n\r\n                <p>\r\n                    It also covers lines that transmit power and data together,\r\n                    including PoE applications.\r\n                    <sup><a href=\"#reference-2\">[2]<\/a><\/sup>\r\n                <\/p>\r\n\r\n                <div class=\"pump-table-wrap\">\r\n                    <table class=\"pump-table\">\r\n                        <thead>\r\n                            <tr>\r\n                                <th scope=\"col\">Circuit<\/th>\r\n                                <th scope=\"col\">Initial SPD Direction<\/th>\r\n                                <th scope=\"col\">Confirm Before Selection<\/th>\r\n                                <th scope=\"col\">Common Risk<\/th>\r\n                            <\/tr>\r\n                        <\/thead>\r\n\r\n                        <tbody>\r\n                            <tr>\r\n                                <th scope=\"row\">Three-phase AC<\/th>\r\n\r\n                                <td data-label=\"SPD direction\">\r\n                                    Type 2 or Type 1+2 AC SPD\r\n                                <\/td>\r\n\r\n                                <td data-label=\"Confirm\">\r\n                                    Voltage, earthing system, poles, Uc, Up,\r\n                                    In, Imax, Iimp and backup protection\r\n                                <\/td>\r\n\r\n                                <td data-label=\"Common risk\">\r\n                                    Selecting only from pump kW or Imax\r\n                                <\/td>\r\n                            <\/tr>\r\n\r\n                            <tr>\r\n                                <th scope=\"row\">24V DC control<\/th>\r\n\r\n                                <td data-label=\"SPD direction\">\r\n                                    Low-voltage DC control-line SPD\r\n                                <\/td>\r\n\r\n                                <td data-label=\"Confirm\">\r\n                                    Maximum DC voltage, current, conductors,\r\n                                    grounding and voltage drop\r\n                                <\/td>\r\n\r\n                                <td data-label=\"Common risk\">\r\n                                    Using a mains AC SPD\r\n                                <\/td>\r\n                            <\/tr>\r\n\r\n                            <tr>\r\n                                <th scope=\"row\">4\u201320mA sensor<\/th>\r\n\r\n                                <td data-label=\"SPD direction\">\r\n                                    Application-matched analog signal SPD\r\n                                <\/td>\r\n\r\n                                <td data-label=\"Confirm\">\r\n                                    Two-wire or four-wire loop, voltage,\r\n                                    resistance, grounding and HART\r\n                                <\/td>\r\n\r\n                                <td data-label=\"Common risk\">\r\n                                    Ignoring the available loop voltage\r\n                                <\/td>\r\n                            <\/tr>\r\n\r\n                            <tr>\r\n                                <th scope=\"row\">Float switch<\/th>\r\n\r\n                                <td data-label=\"SPD direction\">\r\n                                    Digital-input or control-line SPD\r\n                                <\/td>\r\n\r\n                                <td data-label=\"Confirm\">\r\n                                    Dry or powered contact, AC or DC voltage,\r\n                                    current and conductors\r\n                                <\/td>\r\n\r\n                                <td data-label=\"Common risk\">\r\n                                    Using a low-voltage SPD on an AC control circuit\r\n                                <\/td>\r\n                            <\/tr>\r\n\r\n                            <tr>\r\n                                <th scope=\"row\">RS485 \/ Modbus<\/th>\r\n\r\n                                <td data-label=\"SPD direction\">\r\n                                    RS485 or industrial-data SPD\r\n                                <\/td>\r\n\r\n                                <td data-label=\"Confirm\">\r\n                                    Working voltage, two-wire or four-wire,\r\n                                    data rate, reference and shielding\r\n                                <\/td>\r\n\r\n                                <td data-label=\"Common risk\">\r\n                                    Incompatible capacitance or grounding\r\n                                <\/td>\r\n                            <\/tr>\r\n\r\n                            <tr>\r\n                                <th scope=\"row\">Ethernet \/ PoE<\/th>\r\n\r\n                                <td data-label=\"SPD direction\">\r\n                                    RJ45 or PoE-compatible SPD\r\n                                <\/td>\r\n\r\n                                <td data-label=\"Confirm\">\r\n                                    100M or Gigabit, PoE standard, power,\r\n                                    pair usage and shielding\r\n                                <\/td>\r\n\r\n                                <td data-label=\"Common risk\">\r\n                                    Assuming all RJ45 SPDs support every PoE mode\r\n                                <\/td>\r\n                            <\/tr>\r\n                        <\/tbody>\r\n                    <\/table>\r\n\r\n                    <p class=\"pump-table-note\">\r\n                        On mobile devices, each table row is automatically converted\r\n                        into a vertical card.\r\n                    <\/p>\r\n                <\/div>\r\n\r\n                <figure class=\"pump-figure\">\r\n                    <div class=\"pump-figure-frame\">\r\n                        <a\r\n                            class=\"pump-figure-link\"\r\n                            href=\"https:\/\/www.cnspd.com\/wp-content\/uploads\/2026\/07\/pump-control-panel-spd-selection-comparison.webp\"\r\n                            target=\"_blank\"\r\n                            rel=\"noopener\"\r\n                            aria-label=\"Open the pump control panel SPD selection comparison diagram\"\r\n                        >\r\n                            <img loading=\"lazy\"\r\n                                src=\"https:\/\/www.cnspd.com\/wp-content\/uploads\/2026\/07\/pump-control-panel-spd-selection-comparison.webp\"\r\n                                width=\"1448\"\r\n                                height=\"1086\"\r\n                                loading=\"lazy\"\r\n                                decoding=\"async\"\r\n                                alt=\"Pump control panel SPD selection comparison for three-phase AC, control power, 24V DC, 4-20mA, RS485 and Ethernet\"\r\n                            \/>\r\n                        <\/a>\r\n\r\n                        <figcaption>\r\n                            <strong>\r\n                                Pump control panel SPD selection comparison\r\n                            <\/strong>\r\n                            This image provides a fast comparison of the main power,\r\n                            control and communication protection categories.\r\n                        <\/figcaption>\r\n                    <\/div>\r\n                <\/figure>\r\n\r\n                <div class=\"pump-good\">\r\n                    <h3>\r\n                        Install signal SPDs at the cable entry\r\n                    <\/h3>\r\n\r\n                    <p>\r\n                        Place a signal SPD close to the point where the external cable\r\n                        enters the cabinet.\r\n                    <\/p>\r\n\r\n                    <p>\r\n                        Avoid routing the protected cable back beside the unprotected\r\n                        incoming cable for a long distance.\r\n                    <\/p>\r\n                <\/div>\r\n            <\/section>\r\n\r\n            <!-- OUTDOOR INSTALLATION -->\r\n            <section id=\"outdoor-installation\">\r\n                <h2><span class=\"ez-toc-section\" id=\"outdoor-pump-station-installation-and-grounding\"><\/span>\r\n                    Outdoor Pump Station Installation and Grounding\r\n                <span class=\"ez-toc-section-end\"><\/span><\/h2>\r\n\r\n                <p>\r\n                    An IP-rated enclosure protects against environmental entry such\r\n                    as dust and water.\r\n                <\/p>\r\n\r\n                <p>\r\n                    It does not stop transient overvoltage entering through an\r\n                    electrical conductor.\r\n                <\/p>\r\n\r\n                <p>\r\n                    The installed performance of the SPD also depends on its location,\r\n                    connecting-conductor length, cable routing and equipotential\r\n                    bonding.\r\n                <\/p>\r\n\r\n                <h3>Recommended practices<\/h3>\r\n\r\n                <ul class=\"pump-check-list\">\r\n                    <li>Install the SPD close to the cable-entry point.<\/li>\r\n                    <li>Use a short and direct connection to the PE or bonding bar.<\/li>\r\n                    <li>Keep unprotected wiring away from protected wiring.<\/li>\r\n                    <li>Separate motor power, analog signal and communication wiring.<\/li>\r\n                    <li>Use sealed and organised cable entries.<\/li>\r\n                    <li>Control condensation, corrosion and cabinet temperature.<\/li>\r\n                    <li>Provide access for module replacement and inspection.<\/li>\r\n                <\/ul>\r\n\r\n                <figure class=\"pump-figure\">\r\n                    <div class=\"pump-figure-frame\">\r\n                        <a\r\n                            class=\"pump-figure-link\"\r\n                            href=\"https:\/\/www.cnspd.com\/wp-content\/uploads\/2026\/07\/outdoor-pump-station-spd-installation-grounding-maintenance.webp\"\r\n                            target=\"_blank\"\r\n                            rel=\"noopener\"\r\n                            aria-label=\"Open the outdoor pump station SPD installation and grounding diagram\"\r\n                        >\r\n                            <img loading=\"lazy\"\r\n                                src=\"https:\/\/www.cnspd.com\/wp-content\/uploads\/2026\/07\/outdoor-pump-station-spd-installation-grounding-maintenance.webp\"\r\n                                width=\"1448\"\r\n                                height=\"1086\"\r\n                                loading=\"lazy\"\r\n                                decoding=\"async\"\r\n                                alt=\"Outdoor pump station SPD installation showing short grounding, cable separation, remote sensors and maintenance alarm\"\r\n                            \/>\r\n                        <\/a>\r\n\r\n                        <figcaption>\r\n                            <strong>\r\n                                Outdoor pump station installation, grounding and maintenance\r\n                            <\/strong>\r\n                            The image shows suitable entry-point placement, short\r\n                            bonding, wiring separation, remote monitoring and common\r\n                            installation mistakes.\r\n                        <\/figcaption>\r\n                    <\/div>\r\n                <\/figure>\r\n\r\n                <div class=\"pump-two-column\">\r\n                    <div class=\"pump-text-box\">\r\n                        <h3>Correct installation<\/h3>\r\n\r\n                        <ul class=\"pump-check-list\">\r\n                            <li>Short SPD-to-PE conductor<\/li>\r\n                            <li>Common bonding point<\/li>\r\n                            <li>Separated power and signal wiring<\/li>\r\n                            <li>Protected wiring kept away from incoming wiring<\/li>\r\n                            <li>Accessible status and replaceable modules<\/li>\r\n                        <\/ul>\r\n                    <\/div>\r\n\r\n                    <div class=\"pump-text-box\">\r\n                        <h3>Common installation errors<\/h3>\r\n\r\n                        <ul class=\"pump-cross-list\">\r\n                            <li>Long or coiled earth conductor<\/li>\r\n                            <li>SPD mounted far from the cable entry<\/li>\r\n                            <li>Protected and unprotected cables routed together<\/li>\r\n                            <li>Signal cable routed beside motor power cable<\/li>\r\n                            <li>Loose, corroded or poorly maintained terminals<\/li>\r\n                        <\/ul>\r\n                    <\/div>\r\n                <\/div>\r\n            <\/section>\r\n\r\n            <!-- REMOTE ALARM -->\r\n            <section id=\"remote-alarm\">\r\n                <h2><span class=\"ez-toc-section\" id=\"remote-alarm-and-maintenance\"><\/span>\r\n                    Remote Alarm and Maintenance\r\n                <span class=\"ez-toc-section-end\"><\/span><\/h2>\r\n\r\n                <p>\r\n                    Many pumping stations are remote or unmanned.\r\n                <\/p>\r\n\r\n                <p>\r\n                    A visual status window inside the cabinet may not be enough for\r\n                    the maintenance team.\r\n                <\/p>\r\n\r\n                <p>\r\n                    Where the selected SPD provides a dry contact, its status can be\r\n                    connected to a PLC digital input, SCADA system or remote alarm.\r\n                <\/p>\r\n\r\n                <p>\r\n                    Confirm the normally open, normally closed and common contact\r\n                    logic, contact rating and PLC input voltage before wiring the\r\n                    alarm.\r\n                <\/p>\r\n\r\n                <h3>Suggested maintenance checks<\/h3>\r\n\r\n                <ul>\r\n                    <li>Inspect the visual status indicator.<\/li>\r\n                    <li>Test the remote alarm input.<\/li>\r\n                    <li>Check terminals for looseness or overheating.<\/li>\r\n                    <li>Inspect for corrosion and condensation.<\/li>\r\n                    <li>Review the installation after a major lightning event.<\/li>\r\n                    <li>Record module replacement dates.<\/li>\r\n                <\/ul>\r\n            <\/section>\r\n\r\n            <!-- LEEYEE EVIDENCE -->\r\n            <section id=\"leeyee-evidence\">\r\n                <h2><span class=\"ez-toc-section\" id=\"leeyee-product-directions-and-supplier-evidence\"><\/span>\r\n                    LEEYEE Product Directions and Supplier Evidence\r\n                <span class=\"ez-toc-section-end\"><\/span><\/h2>\r\n\r\n                <p>\r\n                    The following LEEYEE product families can be used as initial\r\n                    evaluation directions.\r\n                <\/p>\r\n\r\n                <p>\r\n                    They are not universal selections for every pump panel.\r\n                <\/p>\r\n\r\n                <p>\r\n                    The final Uc, pole configuration, protection mode, signal version\r\n                    and backup protection must match the actual project.\r\n                <\/p>\r\n\r\n                <div class=\"pump-inline-evidence\">\r\n\r\n                    <div class=\"pump-inline-evidence-row\">\r\n                        <div class=\"pump-inline-evidence-label\">\r\n                            Type 2 AC Direction\r\n                        <\/div>\r\n\r\n                        <div>\r\n                            <p>\r\n                                The LEEYEE LY1-C40 multi-pole series can be evaluated\r\n                                for a downstream three-phase pump-panel incomer where\r\n                                its voltage, poles, protection modes and short-circuit\r\n                                conditions match the system.\r\n                            <\/p>\r\n\r\n                            <div class=\"pump-inline-evidence-links\">\r\n                                <a\r\n                                    href=\"https:\/\/www.cnspd.com\/ly1-c403spluggable-multi-pole-spd-product\/\"\r\n                                    target=\"_blank\"\r\n                                    rel=\"noopener\"\r\n                                >\r\n                                    Review LY1-C40\/3(S)\r\n                                <\/a>\r\n\r\n                                <a\r\n                                    href=\"https:\/\/www.cnspd.com\/spd-uc-selection-guide\/\"\r\n                                    target=\"_blank\"\r\n                                    rel=\"noopener\"\r\n                                >\r\n                                    Review Uc selection\r\n                                <\/a>\r\n                            <\/div>\r\n                        <\/div>\r\n                    <\/div>\r\n\r\n                    <div class=\"pump-inline-evidence-row\">\r\n                        <div class=\"pump-inline-evidence-label\">\r\n                            Type 1+2 AC Direction\r\n                        <\/div>\r\n\r\n                        <div>\r\n                            <p>\r\n                                The LEEYEE LY1-12.5 multi-pole series can be evaluated\r\n                                where the project requires a Type 1+2 SPD and the\r\n                                selected version matches the incoming circuit.\r\n                            <\/p>\r\n\r\n                            <div class=\"pump-inline-evidence-links\">\r\n                                <a\r\n                                    href=\"https:\/\/www.cnspd.com\/ly1-12-54spluggable-multi-pole-spd-product\/\"\r\n                                    target=\"_blank\"\r\n                                    rel=\"noopener\"\r\n                                >\r\n                                    Review LY1-12.5\/4(S)\r\n                                <\/a>\r\n\r\n                                <a\r\n                                    href=\"https:\/\/www.cnspd.com\/spd-iimp-12-5ka-vs-25ka\/\"\r\n                                    target=\"_blank\"\r\n                                    rel=\"noopener\"\r\n                                >\r\n                                    Review Iimp selection\r\n                                <\/a>\r\n                            <\/div>\r\n                        <\/div>\r\n                    <\/div>\r\n\r\n                    <div class=\"pump-inline-evidence-row\">\r\n                        <div class=\"pump-inline-evidence-label\">\r\n                            Signal and RS485 Direction\r\n                        <\/div>\r\n\r\n                        <div>\r\n                            <p>\r\n                                The LEEYEE LY10 signal SPD family can be evaluated\r\n                                for compatible RS485, telemetry and industrial\r\n                                low-voltage signal circuits.\r\n                            <\/p>\r\n\r\n                            <p>\r\n                                A separate application review is required for\r\n                                4\u201320mA loops.\r\n                            <\/p>\r\n\r\n                            <p>\r\n                                Do not assume that an RS485 model is automatically\r\n                                suitable for every analog transmitter.\r\n                            <\/p>\r\n\r\n                            <div class=\"pump-inline-evidence-links\">\r\n                                <a\r\n                                    href=\"https:\/\/www.cnspd.com\/portfolio\/ly10-data-signal-dc-surge-protective-device\/\"\r\n                                    target=\"_blank\"\r\n                                    rel=\"noopener\"\r\n                                >\r\n                                    Review LY10 Signal SPD\r\n                                <\/a>\r\n\r\n                                <a\r\n                                    href=\"https:\/\/www.cnspd.com\/4-20ma-signal-spd\/\"\r\n                                    target=\"_blank\"\r\n                                    rel=\"noopener\"\r\n                                >\r\n                                    Review 4\u201320mA selection\r\n                                <\/a>\r\n                            <\/div>\r\n                        <\/div>\r\n                    <\/div>\r\n\r\n                    <div class=\"pump-inline-evidence-row\">\r\n                        <div class=\"pump-inline-evidence-label\">\r\n                            Technical Verification\r\n                        <\/div>\r\n\r\n                        <div>\r\n                            <p>\r\n                                B2B buyers should review product datasheets,\r\n                                certificate scope, wiring documents and sample\r\n                                results before mass-order approval.\r\n                            <\/p>\r\n\r\n                            <p>\r\n                                LEEYEE can support model confirmation, OEM labeling,\r\n                                technical documents, certificate files and sample\r\n                                evaluation for suitable projects.\r\n                            <\/p>\r\n\r\n                            <div class=\"pump-inline-evidence-links\">\r\n                                <a\r\n                                    href=\"https:\/\/www.cnspd.com\/patents-certificates\/\"\r\n                                    target=\"_blank\"\r\n                                    rel=\"noopener\"\r\n                                >\r\n                                    Certificates\r\n                                <\/a>\r\n\r\n                                <a\r\n                                    href=\"https:\/\/www.cnspd.com\/resources\/technical-downloads\/\"\r\n                                    target=\"_blank\"\r\n                                    rel=\"noopener\"\r\n                                >\r\n                                    Technical downloads\r\n                                <\/a>\r\n\r\n                                <a\r\n                                    href=\"https:\/\/www.cnspd.com\/factory-tour\/\"\r\n                                    target=\"_blank\"\r\n                                    rel=\"noopener\"\r\n                                >\r\n                                    Factory information\r\n                                <\/a>\r\n                            <\/div>\r\n                        <\/div>\r\n                    <\/div>\r\n\r\n                <\/div>\r\n            <\/section>\r\n\r\n            <!-- PROCUREMENT -->\r\n            <section id=\"procurement-checklist\">\r\n                <h2><span class=\"ez-toc-section\" id=\"pump-control-panel-spd-procurement-checklist\"><\/span>\r\n                    Pump Control Panel SPD Procurement Checklist\r\n                <span class=\"ez-toc-section-end\"><\/span><\/h2>\r\n\r\n                <p>\r\n                    Before asking a supplier for a model, prepare the following\r\n                    information.\r\n                <\/p>\r\n\r\n                <div class=\"pump-table-wrap\">\r\n                    <table class=\"pump-table\">\r\n                        <thead>\r\n                            <tr>\r\n                                <th scope=\"col\">Information<\/th>\r\n                                <th scope=\"col\">Why It Matters<\/th>\r\n                                <th scope=\"col\">Example Details<\/th>\r\n                            <\/tr>\r\n                        <\/thead>\r\n\r\n                        <tbody>\r\n                            <tr>\r\n                                <th scope=\"row\">Main supply<\/th>\r\n\r\n                                <td data-label=\"Why it matters\">\r\n                                    Determines voltage and pole configuration\r\n                                <\/td>\r\n\r\n                                <td data-label=\"Example details\">\r\n                                    400V, 415V or 480V; three-wire or four-wire\r\n                                <\/td>\r\n                            <\/tr>\r\n\r\n                            <tr>\r\n                                <th scope=\"row\">Earthing system<\/th>\r\n\r\n                                <td data-label=\"Why it matters\">\r\n                                    Determines protection modes and connection\r\n                                <\/td>\r\n\r\n                                <td data-label=\"Example details\">\r\n                                    TN-S, TN-C-S, TT, IT or delta\r\n                                <\/td>\r\n                            <\/tr>\r\n\r\n                            <tr>\r\n                                <th scope=\"row\">Panel location<\/th>\r\n\r\n                                <td data-label=\"Why it matters\">\r\n                                    Helps determine Type 2 or Type 1+2 evaluation\r\n                                <\/td>\r\n\r\n                                <td data-label=\"Example details\">\r\n                                    Service entrance, downstream panel or outdoor site\r\n                                <\/td>\r\n                            <\/tr>\r\n\r\n                            <tr>\r\n                                <th scope=\"row\">Motor control<\/th>\r\n\r\n                                <td data-label=\"Why it matters\">\r\n                                    Defines the VFD or starter arrangement\r\n                                <\/td>\r\n\r\n                                <td data-label=\"Example details\">\r\n                                    DOL, star-delta, soft starter or VFD\r\n                                <\/td>\r\n                            <\/tr>\r\n\r\n                            <tr>\r\n                                <th scope=\"row\">Control voltage<\/th>\r\n\r\n                                <td data-label=\"Why it matters\">\r\n                                    Determines auxiliary AC or DC protection\r\n                                <\/td>\r\n\r\n                                <td data-label=\"Example details\">\r\n                                    230V AC, 110V AC or 24V DC\r\n                                <\/td>\r\n                            <\/tr>\r\n\r\n                            <tr>\r\n                                <th scope=\"row\">Sensor interfaces<\/th>\r\n\r\n                                <td data-label=\"Why it matters\">\r\n                                    Determines the signal SPD type\r\n                                <\/td>\r\n\r\n                                <td data-label=\"Example details\">\r\n                                    4\u201320mA, 0\u201310V, float contact or pulse input\r\n                                <\/td>\r\n                            <\/tr>\r\n\r\n                            <tr>\r\n                                <th scope=\"row\">Communication<\/th>\r\n\r\n                                <td data-label=\"Why it matters\">\r\n                                    Determines data voltage and transmission requirements\r\n                                <\/td>\r\n\r\n                                <td data-label=\"Example details\">\r\n                                    RS485, Modbus RTU, Ethernet or PoE\r\n                                <\/td>\r\n                            <\/tr>\r\n\r\n                            <tr>\r\n                                <th scope=\"row\">Project requirements<\/th>\r\n\r\n                                <td data-label=\"Why it matters\">\r\n                                    Affects technical and commercial approval\r\n                                <\/td>\r\n\r\n                                <td data-label=\"Example details\">\r\n                                    Certificates, remote alarm, quantity and OEM label\r\n                                <\/td>\r\n                            <\/tr>\r\n                        <\/tbody>\r\n                    <\/table>\r\n                <\/div>\r\n\r\n                <div class=\"pump-note\">\r\n                    <h3>\r\n                        A cabinet photograph is helpful, but not sufficient\r\n                    <\/h3>\r\n\r\n                    <p>\r\n                        A photograph can show the layout and available DIN-rail\r\n                        space.\r\n                    <\/p>\r\n\r\n                    <p>\r\n                        It cannot confirm the earthing system, normal voltage, signal\r\n                        interface or upstream protection.\r\n                    <\/p>\r\n                <\/div>\r\n            <\/section>\r\n\r\n            <!-- RELATED GUIDES -->\r\n            <section class=\"pump-related\" aria-labelledby=\"related-guides-title\">\r\n                <h2 id=\"related-guides-title\"><span class=\"ez-toc-section\" id=\"related-technical-guides\"><\/span>\r\n                    Related Technical Guides\r\n                <span class=\"ez-toc-section-end\"><\/span><\/h2>\r\n\r\n                <p>\r\n                    Use these pages for deeper circuit-specific information. This\r\n                    page remains focused on pump control panels.\r\n                <\/p>\r\n\r\n                <ul class=\"pump-related-list\">\r\n                    <li>\r\n                        <a href=\"https:\/\/www.cnspd.com\/4-20ma-signal-spd\/\">\r\n                            4\u201320mA Signal SPD Guide\r\n                        <\/a>\r\n\r\n                        <span>\r\n                            Two-wire and four-wire loop protection, voltage budget\r\n                            and series resistance.\r\n                        <\/span>\r\n                    <\/li>\r\n\r\n                    <li>\r\n                        <a href=\"https:\/\/www.cnspd.com\/24v-signal-surge-protector\/\">\r\n                            24V Signal Surge Protection\r\n                        <\/a>\r\n\r\n                        <span>\r\n                            Protection for PLC inputs, relays, sensors and low-voltage\r\n                            control circuits.\r\n                        <\/span>\r\n                    <\/li>\r\n\r\n                    <li>\r\n                        <a href=\"https:\/\/www.cnspd.com\/rs485-spd-guide\/\">\r\n                            RS485 SPD Selection Guide\r\n                        <\/a>\r\n\r\n                        <span>\r\n                            Interface voltage, wiring, shielding, grounding and data\r\n                            transmission requirements.\r\n                        <\/span>\r\n                    <\/li>\r\n\r\n                    <li>\r\n                        <a href=\"https:\/\/www.cnspd.com\/modbus-surge-protection\/\">\r\n                            Modbus Surge Protection\r\n                        <\/a>\r\n\r\n                        <span>\r\n                            Protection for Modbus RTU, RS485 and Ethernet-based\r\n                            communication.\r\n                        <\/span>\r\n                    <\/li>\r\n\r\n                    <li>\r\n                        <a href=\"https:\/\/www.cnspd.com\/spd-remote-alarm-plc\/\">\r\n                            SPD Remote Alarm to PLC\r\n                        <\/a>\r\n\r\n                        <span>\r\n                            Dry-contact status, PLC input wiring and remote monitoring.\r\n                        <\/span>\r\n                    <\/li>\r\n\r\n                    <li>\r\n                        <a href=\"https:\/\/www.cnspd.com\/surge-protection-for-industrial-control-panels\/\">\r\n                            Industrial Control Panel SPD Guide\r\n                        <\/a>\r\n\r\n                        <span>\r\n                            Broader guidance for non-pump PLC, HMI and VFD control\r\n                            cabinets.\r\n                        <\/span>\r\n                    <\/li>\r\n                <\/ul>\r\n            <\/section>\r\n\r\n            <!-- FAQ -->\r\n            <section id=\"faq\">\r\n                <h2><span class=\"ez-toc-section\" id=\"frequently-asked-questions\"><\/span>\r\n                    Frequently Asked Questions\r\n                <span class=\"ez-toc-section-end\"><\/span><\/h2>\r\n\r\n                <div class=\"pump-faq-list\">\r\n\r\n                    <details class=\"pump-faq\">\r\n                        <summary>\r\n                            What SPD should be used in a three-phase pump control panel?\r\n                        <\/summary>\r\n\r\n                        <div class=\"pump-faq-answer\">\r\n                            <p>\r\n                                A Type 2 SPD is commonly evaluated at a downstream\r\n                                panel.\r\n                            <\/p>\r\n\r\n                            <p>\r\n                                A Type 1+2 SPD may need evaluation at a more exposed\r\n                                incoming position.\r\n                            <\/p>\r\n\r\n                            <p>\r\n                                The exact model depends on voltage, earthing system,\r\n                                neutral arrangement and upstream protection.\r\n                            <\/p>\r\n                        <\/div>\r\n                    <\/details>\r\n\r\n                    <details class=\"pump-faq\">\r\n                        <summary>\r\n                            Can the SPD be selected from the pump kilowatt rating?\r\n                        <\/summary>\r\n\r\n                        <div class=\"pump-faq-answer\">\r\n                            <p>\r\n                                No.\r\n                            <\/p>\r\n\r\n                            <p>\r\n                                Motor power affects switching and overcurrent\r\n                                equipment, but it does not determine the SPD voltage,\r\n                                poles, protection modes or installation category.\r\n                            <\/p>\r\n                        <\/div>\r\n                    <\/details>\r\n\r\n                    <details class=\"pump-faq\">\r\n                        <summary>\r\n                            Does the main AC SPD protect the level sensor?\r\n                        <\/summary>\r\n\r\n                        <div class=\"pump-faq-answer\">\r\n                            <p>\r\n                                No.\r\n                            <\/p>\r\n\r\n                            <p>\r\n                                A surge entering through the sensor cable can bypass\r\n                                the main power SPD and reach the PLC input.\r\n                            <\/p>\r\n\r\n                            <p>\r\n                                Use a signal SPD matched to the sensor interface.\r\n                            <\/p>\r\n                        <\/div>\r\n                    <\/details>\r\n\r\n                    <details class=\"pump-faq\">\r\n                        <summary>\r\n                            Can a normal AC SPD be installed on the VFD output?\r\n                        <\/summary>\r\n\r\n                        <div class=\"pump-faq-answer\">\r\n                            <p>\r\n                                Not as a default solution.\r\n                            <\/p>\r\n\r\n                            <p>\r\n                                VFD output is a PWM waveform.\r\n                            <\/p>\r\n\r\n                            <p>\r\n                                Motor-side voltage stress normally requires\r\n                                drive-approved filters, reactors, cables and motors.\r\n                            <\/p>\r\n                        <\/div>\r\n                    <\/details>\r\n\r\n                    <details class=\"pump-faq\">\r\n                        <summary>\r\n                            Does an outdoor IP65 pump cabinet still need an SPD?\r\n                        <\/summary>\r\n\r\n                        <div class=\"pump-faq-answer\">\r\n                            <p>\r\n                                IP65 addresses dust and water entry.\r\n                            <\/p>\r\n\r\n                            <p>\r\n                                It does not protect against transient voltage entering\r\n                                through power, sensor or communication conductors.\r\n                            <\/p>\r\n                        <\/div>\r\n                    <\/details>\r\n\r\n                    <details class=\"pump-faq\">\r\n                        <summary>\r\n                            Should both ends of a long sensor cable be protected?\r\n                        <\/summary>\r\n\r\n                        <div class=\"pump-faq-answer\">\r\n                            <p>\r\n                                Both-end protection may be appropriate when a long\r\n                                outdoor cable connects valuable equipment or crosses\r\n                                different protection zones.\r\n                            <\/p>\r\n\r\n                            <p>\r\n                                Cable shielding and bonding must also be reviewed.\r\n                            <\/p>\r\n                        <\/div>\r\n                    <\/details>\r\n\r\n                    <details class=\"pump-faq\">\r\n                        <summary>\r\n                            Should the SPD include a remote alarm contact?\r\n                        <\/summary>\r\n\r\n                        <div class=\"pump-faq-answer\">\r\n                            <p>\r\n                                Remote status is useful for unmanned pump stations and\r\n                                sites that are not inspected regularly.\r\n                            <\/p>\r\n\r\n                            <p>\r\n                                Confirm the contact logic, rating and PLC or SCADA\r\n                                input.\r\n                            <\/p>\r\n                        <\/div>\r\n                    <\/details>\r\n\r\n                    <details class=\"pump-faq\">\r\n                        <summary>\r\n                            Does this guide cover fire-pump controllers?\r\n                        <\/summary>\r\n\r\n                        <div class=\"pump-faq-answer\">\r\n                            <p>\r\n                                No.\r\n                            <\/p>\r\n\r\n                            <p>\r\n                                Fire-pump-controller projects require separate review\r\n                                of the applicable controller listing, project\r\n                                specification and compliance requirements.\r\n                            <\/p>\r\n                        <\/div>\r\n                    <\/details>\r\n\r\n                <\/div>\r\n            <\/section>\r\n\r\n            <!-- FINAL CTA -->\r\n            <section class=\"pump-final-cta\" aria-labelledby=\"final-cta-title\">\r\n                <h2 id=\"final-cta-title\"><span class=\"ez-toc-section\" id=\"need-a-pump-panel-spd-configuration\"><\/span>\r\n                    Need a Pump-Panel SPD Configuration?\r\n                <span class=\"ez-toc-section-end\"><\/span><\/h2>\r\n\r\n                <p>\r\n                    Send the main voltage, earthing system, starter or VFD type,\r\n                    control voltage, sensor interfaces, communication lines and\r\n                    panel drawing.\r\n                <\/p>\r\n\r\n                <p>\r\n                    LEEYEE can help review the required AC, DC and signal protection\r\n                    points.\r\n                <\/p>\r\n\r\n                <a\r\n                    class=\"leeyee-site-popup-btn pump-button\"\r\n                    href=\"javascript:void(0);\"\r\n                >\r\n                    <span style=\"color:#ffffff !important;-webkit-text-fill-color:#ffffff !important;\">\r\n                        Discuss the Pump Panel\r\n                    <\/span>\r\n                <\/a>\r\n\r\n                <div class=\"pump-brand-note\">\r\n                    LEEYEE is a specialized surge protection and low-voltage\r\n                    protection supplier, trusted for solar PV, power distribution,\r\n                    telecom, industrial and OEM applications.\r\n\r\n                    <br \/>\r\n\r\n                    CNSPD is LEEYEE\u2019s surge protection-focused platform, built to\r\n                    help global buyers source reliable SPDs and related low-voltage\r\n                    protection products.\r\n\r\n                    <span class=\"pump-brand-slogan\">\r\n                        Built to Protect. Trusted to Last.\r\n                    <\/span>\r\n                <\/div>\r\n            <\/section>\r\n\r\n            <!-- REFERENCES -->\r\n            <section id=\"references\">\r\n                <h2><span class=\"ez-toc-section\" id=\"references\"><\/span>\r\n                    References\r\n                <span class=\"ez-toc-section-end\"><\/span><\/h2>\r\n\r\n                <p>\r\n                    Final system design must comply with applicable national rules,\r\n                    project specifications and the instructions supplied with the\r\n                    selected SPD and connected equipment.\r\n                <\/p>\r\n\r\n                <ol class=\"pump-references\">\r\n                    <li id=\"reference-1\">\r\n                        International Electrotechnical Commission,\r\n                        <a\r\n                            href=\"https:\/\/webstore.iec.ch\/en\/publication\/65314\"\r\n                            target=\"_blank\"\r\n                            rel=\"noopener noreferrer\"\r\n                        >\r\n                            IEC 61643-11:2025 \u2014 Low-voltage surge protective devices\r\n                            connected to AC low-voltage power systems\r\n                        <\/a>.\r\n                    <\/li>\r\n\r\n                    <li id=\"reference-2\">\r\n                        International Electrotechnical Commission,\r\n                        <a\r\n                            href=\"https:\/\/webstore.iec.ch\/en\/publication\/69085\"\r\n                            target=\"_blank\"\r\n                            rel=\"noopener noreferrer\"\r\n                        >\r\n                            IEC 61643-21:2025 \u2014 Surge protective devices connected to\r\n                            telecommunications and signalling networks\r\n                        <\/a>.\r\n                    <\/li>\r\n\r\n                    <li id=\"reference-3\">\r\n                        International Electrotechnical Commission,\r\n                        <a\r\n                            href=\"https:\/\/webstore.iec.ch\/en\/publication\/65315\"\r\n                            target=\"_blank\"\r\n                            rel=\"noopener noreferrer\"\r\n                        >\r\n                            IEC 61643-01:2024 \u2014 Common requirements for low-voltage\r\n                            surge protective devices\r\n                        <\/a>.\r\n                    <\/li>\r\n\r\n                    <li id=\"reference-4\">\r\n                        Weidm\u00fcller,\r\n                        <a\r\n                            href=\"https:\/\/www.weidmueller.com\/int\/products\/electronics\/lightning_and_surge_protection\/technical_basics.jsp\"\r\n                            target=\"_blank\"\r\n                            rel=\"noopener noreferrer\"\r\n                        >\r\n                            Technical Basics of Lightning and Surge Protection\r\n                        <\/a>.\r\n                    <\/li>\r\n\r\n                    <li id=\"reference-5\">\r\n                        Danfoss,\r\n                        <a\r\n                            href=\"https:\/\/www.danfoss.com\/en\/products\/dds\/low-voltage-drives\/options\/vlt-power-options\/\"\r\n                            target=\"_blank\"\r\n                            rel=\"noopener noreferrer\"\r\n                        >\r\n                            VLT Power Options \u2014 Sine-Wave and dU\/dt Output Filters\r\n                        <\/a>.\r\n                    <\/li>\r\n\r\n                    <li id=\"reference-6\">\r\n                        Schneider Electric,\r\n                        <a\r\n                            href=\"https:\/\/www.se.com\/us\/en\/download\/document\/AG-22020\/\"\r\n                            target=\"_blank\"\r\n                            rel=\"noopener noreferrer\"\r\n                        >\r\n                            Water\/Wastewater Full Facility Surge Protection,\r\n                            Application Note AG-22020\r\n                        <\/a>.\r\n                    <\/li>\r\n\r\n                    <li id=\"reference-7\">\r\n                        CITEL,\r\n                        <a\r\n                            href=\"https:\/\/citel.us\/en\/surge-protection-for-lift-stations\"\r\n                            target=\"_blank\"\r\n                            rel=\"noopener noreferrer\"\r\n                        >\r\n                            Surge Protection for Lift Stations and Pump Panels\r\n                        <\/a>.\r\n                    <\/li>\r\n\r\n                    <li id=\"reference-8\">\r\n                        LEEYEE,\r\n                        <a\r\n                            href=\"https:\/\/www.cnspd.com\/patents-certificates\/\"\r\n                            target=\"_blank\"\r\n                            rel=\"noopener noreferrer\"\r\n                        >\r\n                            Product certificate and certificate-scope information\r\n                        <\/a>.\r\n                    <\/li>\r\n                <\/ol>\r\n            <\/section>\r\n\r\n        <\/div>\r\n    <\/div>\r\n<\/article>\r\n\r\n<script type=\"application\/ld+json\">\r\n{\r\n    \"@context\": \"https:\/\/schema.org\",\r\n    \"@graph\": [\r\n        {\r\n            \"@type\": \"TechArticle\",\r\n            \"@id\": \"https:\/\/www.cnspd.com\/pump-control-panel-spd\/#article\",\r\n            \"mainEntityOfPage\": {\r\n                \"@type\": \"WebPage\",\r\n                \"@id\": \"https:\/\/www.cnspd.com\/pump-control-panel-spd\/\"\r\n            },\r\n            \"headline\": \"Pump Control Panel SPD Selection Guide\",\r\n            \"alternativeHeadline\": \"Pump Station Surge Protection Guide for AC Power, Sensors and Communication Lines\",\r\n            \"description\": \"Select surge protection for pump control panels and pump stations, including three-phase AC, VFD input, 24V DC, 4\u201320mA sensors, RS485, grounding and remote alarm.\",\r\n            \"datePublished\": \"2026-07-21\",\r\n            \"dateModified\": \"2026-07-21\",\r\n            \"inLanguage\": \"en\",\r\n            \"author\": {\r\n                \"@type\": \"Person\",\r\n                \"name\": \"Devin Ling\"\r\n            },\r\n            \"publisher\": {\r\n                \"@type\": \"Organization\",\r\n                \"name\": \"LEEYEE\",\r\n                \"url\": \"https:\/\/www.cnspd.com\/\"\r\n            },\r\n            \"image\": [\r\n                {\r\n                    \"@type\": \"ImageObject\",\r\n                    \"url\": \"https:\/\/www.cnspd.com\/wp-content\/uploads\/2026\/07\/pump-control-panel-surge-protection-architecture.webp\",\r\n                    \"width\": 1448,\r\n                    \"height\": 1086\r\n                },\r\n                {\r\n                    \"@type\": \"ImageObject\",\r\n                    \"url\": \"https:\/\/www.cnspd.com\/wp-content\/uploads\/2026\/07\/pump-control-panel-spd-selection-comparison.webp\",\r\n                    \"width\": 1448,\r\n                    \"height\": 1086\r\n                },\r\n                {\r\n                    \"@type\": \"ImageObject\",\r\n                    \"url\": \"https:\/\/www.cnspd.com\/wp-content\/uploads\/2026\/07\/outdoor-pump-station-spd-installation-grounding-maintenance.webp\",\r\n                    \"width\": 1448,\r\n                    \"height\": 1086\r\n                }\r\n            ],\r\n            \"about\": [\r\n                \"Pump control panel SPD\",\r\n                \"Pump control panel surge protection\",\r\n                \"Pump station surge protection\",\r\n                \"Three-phase AC surge protection\",\r\n                \"VFD input surge protection\",\r\n                \"4\u201320mA signal surge protection\",\r\n                \"RS485 surge protection\",\r\n                \"Outdoor pump station surge protection\"\r\n            ],\r\n            \"audience\": {\r\n                \"@type\": \"BusinessAudience\",\r\n                \"audienceType\": \"Pump control panel manufacturers, water-treatment contractors, municipal project contractors, industrial control-panel builders, distributors and OEM buyers\"\r\n            }\r\n        },\r\n        {\r\n            \"@type\": \"FAQPage\",\r\n            \"@id\": \"https:\/\/www.cnspd.com\/pump-control-panel-spd\/#faq\",\r\n            \"mainEntity\": [\r\n                {\r\n                    \"@type\": \"Question\",\r\n                    \"name\": \"What SPD should be used in a three-phase pump control panel?\",\r\n                    \"acceptedAnswer\": {\r\n                        \"@type\": \"Answer\",\r\n                        \"text\": \"A Type 2 SPD is commonly evaluated at a downstream panel. A Type 1+2 SPD may need evaluation at a more exposed incoming position. The exact model depends on voltage, earthing system, neutral arrangement and upstream protection.\"\r\n                    }\r\n                },\r\n                {\r\n                    \"@type\": \"Question\",\r\n                    \"name\": \"Can the SPD be selected from the pump kilowatt rating?\",\r\n                    \"acceptedAnswer\": {\r\n                        \"@type\": \"Answer\",\r\n                        \"text\": \"No. Motor power affects switching and overcurrent equipment, but it does not determine the SPD voltage, poles, protection modes or installation category.\"\r\n                    }\r\n                },\r\n                {\r\n                    \"@type\": \"Question\",\r\n                    \"name\": \"Does the main AC SPD protect the level sensor?\",\r\n                    \"acceptedAnswer\": {\r\n                        \"@type\": \"Answer\",\r\n                        \"text\": \"No. A surge entering through the sensor cable can bypass the main power SPD and reach the PLC input. Use a signal SPD matched to the sensor interface.\"\r\n                    }\r\n                },\r\n                {\r\n                    \"@type\": \"Question\",\r\n                    \"name\": \"Can a normal AC SPD be installed on the VFD output?\",\r\n                    \"acceptedAnswer\": {\r\n                        \"@type\": \"Answer\",\r\n                        \"text\": \"Not as a default solution. VFD output is a PWM waveform. Motor-side voltage stress normally requires drive-approved filters, reactors, cables and motors.\"\r\n                    }\r\n                },\r\n                {\r\n                    \"@type\": \"Question\",\r\n                    \"name\": \"Does an outdoor IP65 pump cabinet still need an SPD?\",\r\n                    \"acceptedAnswer\": {\r\n                        \"@type\": \"Answer\",\r\n                        \"text\": \"IP65 addresses dust and water entry. It does not protect against transient voltage entering through power, sensor or communication conductors.\"\r\n                    }\r\n                },\r\n                {\r\n                    \"@type\": \"Question\",\r\n                    \"name\": \"Should both ends of a long sensor cable be protected?\",\r\n                    \"acceptedAnswer\": {\r\n                        \"@type\": \"Answer\",\r\n                        \"text\": \"Both-end protection may be appropriate when a long outdoor cable connects valuable equipment or crosses different protection zones. Cable shielding and bonding must also be reviewed.\"\r\n                    }\r\n                },\r\n                {\r\n                    \"@type\": \"Question\",\r\n                    \"name\": \"Should the SPD include a remote alarm contact?\",\r\n                    \"acceptedAnswer\": {\r\n                        \"@type\": \"Answer\",\r\n                        \"text\": \"Remote status is useful for unmanned pump stations and sites that are not inspected regularly. Confirm the contact logic, rating and PLC or SCADA input.\"\r\n                    }\r\n                },\r\n                {\r\n                    \"@type\": \"Question\",\r\n                    \"name\": \"Does this guide cover fire-pump controllers?\",\r\n                    \"acceptedAnswer\": {\r\n                        \"@type\": \"Answer\",\r\n                        \"text\": \"No. Fire-pump-controller projects require separate review of the applicable controller listing, project specification and compliance requirements.\"\r\n                    }\r\n                }\r\n            ]\r\n        },\r\n        {\r\n            \"@type\": \"BreadcrumbList\",\r\n            \"@id\": \"https:\/\/www.cnspd.com\/pump-control-panel-spd\/#breadcrumb\",\r\n            \"itemListElement\": [\r\n                {\r\n                    \"@type\": \"ListItem\",\r\n                    \"position\": 1,\r\n                    \"name\": \"Home\",\r\n                    \"item\": \"https:\/\/www.cnspd.com\/\"\r\n                },\r\n                {\r\n                    \"@type\": \"ListItem\",\r\n                    \"position\": 2,\r\n                    \"name\": \"Resources\",\r\n                    \"item\": \"https:\/\/www.cnspd.com\/resources\/\"\r\n                },\r\n                {\r\n                    \"@type\": \"ListItem\",\r\n                    \"position\": 3,\r\n                    \"name\": \"Pump Control Panel SPD Selection Guide\",\r\n                    \"item\": \"https:\/\/www.cnspd.com\/pump-control-panel-spd\/\"\r\n                }\r\n            ]\r\n        }\r\n    ]\r\n}\r\n<\/script>\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>A pump control panel may need surge protection for more than its three-phase power supply. External level sensors, pressure transmitters, 4\u201320mA loops, RS485 cables and remote communication lines can also carry transient overvoltage into the PLC, VFD and control power supply. This guide explains how pump-panel manufacturers, water-treatment contractors, municipal project teams, maintenance teams, distributors&#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-30319","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>Pump Control Panel SPD Guide | Pump Station Protection<\/title>\n<meta name=\"description\" content=\"Select SPDs for pump control panels and pump stations: three-phase AC, VFD input, 24V DC, 4\u201320mA sensors, RS485, grounding and remote alarm.\" \/>\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\/de\/pump-control-panel-spd\/\" \/>\n<meta property=\"og:locale\" content=\"de_DE\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Pump Control Panel SPD Guide | Pump Station Protection\" \/>\n<meta property=\"og:description\" content=\"Select SPDs for pump control panels and pump stations: three-phase AC, VFD input, 24V DC, 4\u201320mA sensors, RS485, grounding and remote alarm.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.cnspd.com\/de\/pump-control-panel-spd\/\" \/>\n<meta property=\"og:site_name\" content=\"Surge Protector, Surge Arrestor, Isolating Switch - LEEYEE\" \/>\n<meta property=\"article:published_time\" content=\"2026-07-21T08:49:57+00:00\" \/>\n<meta name=\"author\" content=\"Devin Ling\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Verfasst von\" \/>\n\t<meta name=\"twitter:data1\" content=\"Devin Ling\" \/>\n\t<meta name=\"twitter:label2\" content=\"Gesch\u00e4tzte Lesezeit\" \/>\n\t<meta name=\"twitter:data2\" content=\"13\u00a0Minuten\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\\\/\\\/www.cnspd.com\\\/pump-control-panel-spd\\\/#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/www.cnspd.com\\\/pump-control-panel-spd\\\/\"},\"author\":{\"name\":\"Devin Ling\",\"@id\":\"https:\\\/\\\/www.cnspd.com\\\/#\\\/schema\\\/person\\\/f49dbafe62c5b47100ad2d9f88af92d3\"},\"headline\":\"Pump Control Panel SPD Selection Guide\",\"datePublished\":\"2026-07-21T08:49:57+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\\\/\\\/www.cnspd.com\\\/pump-control-panel-spd\\\/\"},\"wordCount\":2660,\"articleSection\":[\"News\"],\"inLanguage\":\"de\"},{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/www.cnspd.com\\\/pump-control-panel-spd\\\/\",\"url\":\"https:\\\/\\\/www.cnspd.com\\\/pump-control-panel-spd\\\/\",\"name\":\"Pump Control Panel SPD Guide | Pump Station Protection\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/www.cnspd.com\\\/#website\"},\"datePublished\":\"2026-07-21T08:49:57+00:00\",\"author\":{\"@id\":\"https:\\\/\\\/www.cnspd.com\\\/#\\\/schema\\\/person\\\/f49dbafe62c5b47100ad2d9f88af92d3\"},\"description\":\"Select SPDs for pump control panels and pump stations: three-phase AC, VFD input, 24V DC, 4\u201320mA sensors, RS485, grounding and remote alarm.\",\"breadcrumb\":{\"@id\":\"https:\\\/\\\/www.cnspd.com\\\/pump-control-panel-spd\\\/#breadcrumb\"},\"inLanguage\":\"de\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\\\/\\\/www.cnspd.com\\\/pump-control-panel-spd\\\/\"]}]},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\\\/\\\/www.cnspd.com\\\/pump-control-panel-spd\\\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\\\/\\\/www.cnspd.com\\\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Pump Control Panel SPD Selection Guide\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\\\/\\\/www.cnspd.com\\\/#website\",\"url\":\"https:\\\/\\\/www.cnspd.com\\\/\",\"name\":\"Surge Protector, Surge Arrestor, Isolating Switch - 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