{"id":30319,"date":"2026-07-21T16:49:57","date_gmt":"2026-07-21T08:49:57","guid":{"rendered":"https:\/\/www.cnspd.com\/?p=30319"},"modified":"2026-07-23T16:07:53","modified_gmt":"2026-07-23T08:07:53","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_87 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>Ein Pumpensteuerpult ben\u00f6tigt m\u00f6glicherweise mehr als nur einen \u00dcberspannungsschutz f\u00fcr die dreiphasige Stromversorgung. Externe F\u00fcllstandssensoren, Druckmessumformer, 4\u201320 mA-Schleifen, RS485-Kabel und Fernkommunikationsleitungen k\u00f6nnen ebenfalls transiente \u00dcberspannungen in die SPS, Frequenzumrichter und die Steuerspannungsversorgung \u00fcbertragen. Dieser Leitfaden erl\u00e4utert, wie Hersteller von Pumpenpaneelen, Wasseraufbereitungsunternehmen, kommunale Projektteams, Wartungsteams, Distributoren&#8230;<\/p>","protected":false},"author":18,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1,488,422],"tags":[],"class_list":["post-30319","post","type-post","status-publish","format-standard","hentry","category-news","category-surge-protection","category-industry-news"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.3 - 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 property=\"article:modified_time\" content=\"2026-07-23T08:07:53+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\",\"dateModified\":\"2026-07-23T08:07:53+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\\\/\\\/www.cnspd.com\\\/pump-control-panel-spd\\\/\"},\"wordCount\":2660,\"articleSection\":[\"News\",\"Surge Protection\",\"Technical Guides\"],\"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\",\"dateModified\":\"2026-07-23T08:07:53+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 - LEEYEE\",\"description\":\"Surge Protector, Surge Arrestor, Isolating Switch - LEEYEE\",\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\\\/\\\/www.cnspd.com\\\/?s={search_term_string}\"},\"query-input\":{\"@type\":\"PropertyValueSpecification\",\"valueRequired\":true,\"valueName\":\"search_term_string\"}}],\"inLanguage\":\"de\"},{\"@type\":\"Person\",\"@id\":\"https:\\\/\\\/www.cnspd.com\\\/#\\\/schema\\\/person\\\/f49dbafe62c5b47100ad2d9f88af92d3\",\"name\":\"Devin Ling\",\"sameAs\":[\"https:\\\/\\\/cnspd.com\\\/\"],\"url\":\"https:\\\/\\\/www.cnspd.com\\\/de\\\/author\\\/devin\\\/\"}]}<\/script>\n<!-- \/ Yoast SEO plugin. -->","yoast_head_json":{"title":"Pumpensteuerungspanel SPD-Leitfaden | Schutz der Pumpstation","description":"W\u00e4hlen Sie SPDs f\u00fcr Pumpensteuerungspaneele und Pumpstationen: Dreiphasen-Wechselstrom, VFD-Eingang, 24V Gleichstrom, 4\u201320mA Sonden, RS485, Erdung und Fernalarm.","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/www.cnspd.com\/de\/pump-control-panel-spd\/","og_locale":"de_DE","og_type":"article","og_title":"Pump Control Panel SPD Guide | Pump Station Protection","og_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.","og_url":"https:\/\/www.cnspd.com\/de\/pump-control-panel-spd\/","og_site_name":"Surge Protector, Surge Arrestor, Isolating Switch - LEEYEE","article_published_time":"2026-07-21T08:49:57+00:00","article_modified_time":"2026-07-23T08:07:53+00:00","author":"Devin Ling","twitter_card":"summary_large_image","twitter_misc":{"Verfasst von":"Devin Ling","Gesch\u00e4tzte Lesezeit":"13\u00a0Minuten"},"schema":{"@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","dateModified":"2026-07-23T08:07:53+00:00","mainEntityOfPage":{"@id":"https:\/\/www.cnspd.com\/pump-control-panel-spd\/"},"wordCount":2660,"articleSection":["News","Surge Protection","Technical Guides"],"inLanguage":"de"},{"@type":"WebPage","@id":"https:\/\/www.cnspd.com\/pump-control-panel-spd\/","url":"https:\/\/www.cnspd.com\/pump-control-panel-spd\/","name":"Pumpensteuerungspanel SPD-Leitfaden | Schutz der Pumpstation","isPartOf":{"@id":"https:\/\/www.cnspd.com\/#website"},"datePublished":"2026-07-21T08:49:57+00:00","dateModified":"2026-07-23T08:07:53+00:00","author":{"@id":"https:\/\/www.cnspd.com\/#\/schema\/person\/f49dbafe62c5b47100ad2d9f88af92d3"},"description":"W\u00e4hlen Sie SPDs f\u00fcr Pumpensteuerungspaneele und Pumpstationen: Dreiphasen-Wechselstrom, VFD-Eingang, 24V Gleichstrom, 4\u201320mA Sonden, RS485, Erdung und Fernalarm.","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":"\u00dcberspannungsschutz, \u00dcberspannungsableiter, Isolierschalter - LEEYEE","description":"\u00dcberspannungsschutz, \u00dcberspannungsableiter, Isolierschalter - LEEYEE","potentialAction":[{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https:\/\/www.cnspd.com\/?s={search_term_string}"},"query-input":{"@type":"PropertyValueSpecification","valueRequired":true,"valueName":"search_term_string"}}],"inLanguage":"de"},{"@type":"Person","@id":"https:\/\/www.cnspd.com\/#\/schema\/person\/f49dbafe62c5b47100ad2d9f88af92d3","name":"Devin Ling","sameAs":["https:\/\/cnspd.com\/"],"url":"https:\/\/www.cnspd.com\/de\/author\/devin\/"}]}},"_links":{"self":[{"href":"https:\/\/www.cnspd.com\/de\/wp-json\/wp\/v2\/posts\/30319","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.cnspd.com\/de\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.cnspd.com\/de\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.cnspd.com\/de\/wp-json\/wp\/v2\/users\/18"}],"replies":[{"embeddable":true,"href":"https:\/\/www.cnspd.com\/de\/wp-json\/wp\/v2\/comments?post=30319"}],"version-history":[{"count":3,"href":"https:\/\/www.cnspd.com\/de\/wp-json\/wp\/v2\/posts\/30319\/revisions"}],"predecessor-version":[{"id":30323,"href":"https:\/\/www.cnspd.com\/de\/wp-json\/wp\/v2\/posts\/30319\/revisions\/30323"}],"wp:attachment":[{"href":"https:\/\/www.cnspd.com\/de\/wp-json\/wp\/v2\/media?parent=30319"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.cnspd.com\/de\/wp-json\/wp\/v2\/categories?post=30319"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.cnspd.com\/de\/wp-json\/wp\/v2\/tags?post=30319"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}