{"id":31544,"date":"2026-10-08T09:11:33","date_gmt":"2026-10-08T01:11:33","guid":{"rendered":"https:\/\/www.cnspd.com\/?p=31544"},"modified":"2026-10-08T09:11:57","modified_gmt":"2026-10-08T01:11:57","slug":"automatic-transfer-switch-for-elevators-generator-ats-and-emergency-power-selection-guide","status":"publish","type":"post","link":"https:\/\/www.cnspd.com\/th\/elevator-building-automatic-transfer-switch\/","title":{"rendered":"Automatic Transfer Switch for Elevators: Generator, ATS and Emergency Power Selection Guide"},"content":{"rendered":"\t\t<div data-elementor-type=\"wp-post\" data-elementor-id=\"31544\" class=\"elementor elementor-31544\" data-elementor-post-type=\"post\">\n\t\t\t\t<div class=\"elementor-element elementor-element-320954f e-flex e-con-boxed e-con e-parent\" data-id=\"320954f\" 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-adaf4f2 elementor-widget elementor-widget-html\" data-id=\"adaf4f2\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"html.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<style>\r\n  #leeyee-elevator-ats-guide {\r\n    --ly-blue: #004898;\r\n    --ly-blue-dark: #00396f;\r\n    --ly-blue-soft: #eef5ff;\r\n    --ly-blue-pale: #f7fbff;\r\n    --ly-text: #263442;\r\n    --ly-muted: #607080;\r\n    --ly-border: #dce6ef;\r\n    --ly-warning-bg: #fff8e8;\r\n    --ly-warning-border: #d49a31;\r\n    --ly-success-bg: #f3f8f5;\r\n    --ly-success-border: #cfe2d7;\r\n    --ly-radius: 12px;\r\n    --ly-shadow: 0 6px 20px rgba(16, 45, 72, 0.07);\r\n    max-width: 860px;\r\n    margin: 0 auto;\r\n    padding: 8px 18px 56px;\r\n    color: var(--ly-text);\r\n    font-size: 17px;\r\n    line-height: 1.72;\r\n    overflow-wrap: break-word;\r\n  }\r\n\r\n  #leeyee-elevator-ats-guide,\r\n  #leeyee-elevator-ats-guide * {\r\n    box-sizing: border-box;\r\n  }\r\n\r\n  #leeyee-elevator-ats-guide p {\r\n    margin: 0 0 18px;\r\n  }\r\n\r\n  #leeyee-elevator-ats-guide h2 {\r\n    margin: 52px 0 18px;\r\n    color: #172a3a;\r\n    font-size: clamp(27px, 3vw, 33px);\r\n    line-height: 1.25;\r\n    font-weight: 750;\r\n    letter-spacing: -0.015em;\r\n  }\r\n\r\n  #leeyee-elevator-ats-guide h3 {\r\n    margin: 34px 0 13px;\r\n    color: #1b3348;\r\n    font-size: clamp(21px, 2.3vw, 25px);\r\n    line-height: 1.32;\r\n    font-weight: 730;\r\n  }\r\n\r\n  #leeyee-elevator-ats-guide strong {\r\n    color: #182c3c;\r\n    font-weight: 750;\r\n  }\r\n\r\n  #leeyee-elevator-ats-guide a {\r\n    color: var(--ly-blue);\r\n    text-decoration-thickness: 1px;\r\n    text-underline-offset: 3px;\r\n  }\r\n\r\n  #leeyee-elevator-ats-guide a:hover {\r\n    color: var(--ly-blue-dark);\r\n  }\r\n\r\n  #leeyee-elevator-ats-guide .ly-kicker {\r\n    display: inline-flex;\r\n    align-items: center;\r\n    gap: 8px;\r\n    margin: 0 0 13px;\r\n    color: var(--ly-blue);\r\n    font-size: 13px;\r\n    line-height: 1.4;\r\n    font-weight: 800;\r\n    letter-spacing: 0.08em;\r\n    text-transform: uppercase;\r\n  }\r\n\r\n  #leeyee-elevator-ats-guide .ly-kicker::before {\r\n    content: \"\";\r\n    width: 24px;\r\n    height: 3px;\r\n    border-radius: 99px;\r\n    background: var(--ly-blue);\r\n  }\r\n\r\n  #leeyee-elevator-ats-guide .ly-intro {\r\n    margin: 0 0 18px;\r\n    color: #314456;\r\n    font-size: 18px;\r\n    line-height: 1.68;\r\n  }\r\n\r\n  #leeyee-elevator-ats-guide .ly-definition {\r\n    margin: 21px 0 25px;\r\n    padding: 15px 18px;\r\n    border-left: 4px solid var(--ly-blue);\r\n    background: #f8fbfe;\r\n    color: #344a5d;\r\n    font-size: 16px;\r\n  }\r\n\r\n  #leeyee-elevator-ats-guide .ly-quick {\r\n    margin: 26px 0 32px;\r\n    padding: 24px 26px;\r\n    border: 1px solid #cfe0f0;\r\n    border-left: 5px solid var(--ly-blue);\r\n    border-radius: var(--ly-radius);\r\n    background: var(--ly-blue-pale);\r\n    box-shadow: var(--ly-shadow);\r\n  }\r\n\r\n  #leeyee-elevator-ats-guide .ly-quick h2 {\r\n    margin: 0 0 13px;\r\n    color: var(--ly-blue);\r\n    font-size: 23px;\r\n  }\r\n\r\n  #leeyee-elevator-ats-guide .ly-quick p:last-child {\r\n    margin-bottom: 0;\r\n  }\r\n\r\n  #leeyee-elevator-ats-guide .ly-note,\r\n  #leeyee-elevator-ats-guide .ly-warning,\r\n  #leeyee-elevator-ats-guide .ly-checklist,\r\n  #leeyee-elevator-ats-guide .ly-product-scope,\r\n  #leeyee-elevator-ats-guide .ly-cta {\r\n    margin: 27px 0;\r\n    padding: 22px 24px;\r\n    border-radius: var(--ly-radius);\r\n  }\r\n\r\n  #leeyee-elevator-ats-guide .ly-note {\r\n    border: 1px solid #cfdeeb;\r\n    background: var(--ly-blue-pale);\r\n  }\r\n\r\n  #leeyee-elevator-ats-guide .ly-warning {\r\n    border: 1px solid #ead8ab;\r\n    border-left: 5px solid var(--ly-warning-border);\r\n    background: var(--ly-warning-bg);\r\n  }\r\n\r\n  #leeyee-elevator-ats-guide .ly-warning strong:first-child {\r\n    color: #754600;\r\n  }\r\n\r\n  #leeyee-elevator-ats-guide .ly-product-scope {\r\n    border: 1px solid var(--ly-success-border);\r\n    background: var(--ly-success-bg);\r\n  }\r\n\r\n  #leeyee-elevator-ats-guide .ly-product-scope h3,\r\n  #leeyee-elevator-ats-guide .ly-checklist h2,\r\n  #leeyee-elevator-ats-guide .ly-cta h3 {\r\n    margin-top: 0;\r\n  }\r\n\r\n  #leeyee-elevator-ats-guide ul,\r\n  #leeyee-elevator-ats-guide ol {\r\n    margin: 12px 0 20px;\r\n    padding-left: 24px;\r\n  }\r\n\r\n  #leeyee-elevator-ats-guide li {\r\n    margin: 8px 0;\r\n  }\r\n\r\n  #leeyee-elevator-ats-guide .ly-image {\r\n    width: 100%;\r\n    margin: 31px auto 35px;\r\n  }\r\n\r\n  #leeyee-elevator-ats-guide .ly-image img {\r\n    display: block;\r\n    width: 100%;\r\n    height: auto;\r\n    margin: 0 auto;\r\n    border: 1px solid #e0e8ef;\r\n    border-radius: 10px;\r\n    background: #fff;\r\n    box-shadow: 0 7px 24px rgba(15, 48, 76, 0.08);\r\n  }\r\n\r\n  #leeyee-elevator-ats-guide .ly-image figcaption {\r\n    max-width: 780px;\r\n    margin: 10px auto 0;\r\n    color: var(--ly-muted);\r\n    font-size: 14px;\r\n    line-height: 1.55;\r\n    text-align: center;\r\n  }\r\n\r\n  #leeyee-elevator-ats-guide .ly-product-image {\r\n    max-width: 720px;\r\n    margin: 26px auto 31px;\r\n  }\r\n\r\n  #leeyee-elevator-ats-guide .ly-product-image img {\r\n    display: block;\r\n    width: 100%;\r\n    height: auto;\r\n    border: 1px solid #e1e8ee;\r\n    border-radius: 12px;\r\n    background: #fff;\r\n    box-shadow: 0 7px 22px rgba(15, 48, 76, 0.08);\r\n  }\r\n\r\n  #leeyee-elevator-ats-guide .ly-product-image figcaption {\r\n    margin-top: 10px;\r\n    color: var(--ly-muted);\r\n    font-size: 14px;\r\n    line-height: 1.55;\r\n    text-align: center;\r\n  }\r\n\r\n  #leeyee-elevator-ats-guide .ly-table-wrap {\r\n    margin: 24px 0 14px;\r\n    border: 1px solid var(--ly-border);\r\n    border-radius: 11px;\r\n    overflow: hidden;\r\n    background: #fff;\r\n    box-shadow: 0 4px 16px rgba(25, 54, 79, 0.05);\r\n  }\r\n\r\n  #leeyee-elevator-ats-guide table {\r\n    width: 100%;\r\n    margin: 0;\r\n    border-collapse: collapse;\r\n    table-layout: fixed;\r\n  }\r\n\r\n  #leeyee-elevator-ats-guide thead th {\r\n    padding: 14px 16px;\r\n    background: var(--ly-blue);\r\n    color: #fff;\r\n    font-size: 15px;\r\n    line-height: 1.4;\r\n    font-weight: 750;\r\n    text-align: left;\r\n    vertical-align: top;\r\n  }\r\n\r\n  #leeyee-elevator-ats-guide tbody td {\r\n    padding: 14px 16px;\r\n    border-top: 1px solid #e4ebf1;\r\n    color: #344657;\r\n    font-size: 15px;\r\n    line-height: 1.55;\r\n    vertical-align: top;\r\n  }\r\n\r\n  #leeyee-elevator-ats-guide tbody tr:nth-child(even) {\r\n    background: #f9fbfd;\r\n  }\r\n\r\n  #leeyee-elevator-ats-guide .ly-table-note {\r\n    margin: 10px 2px 25px;\r\n    color: var(--ly-muted);\r\n    font-size: 14px;\r\n    line-height: 1.55;\r\n  }\r\n\r\n  #leeyee-elevator-ats-guide .ly-meaning {\r\n    margin: 18px 0 24px;\r\n    padding: 14px 17px;\r\n    border-radius: 9px;\r\n    background: #f5f9fc;\r\n    color: #395064;\r\n    font-size: 15px;\r\n  }\r\n\r\n  #leeyee-elevator-ats-guide .ly-meaning strong {\r\n    color: var(--ly-blue);\r\n  }\r\n\r\n  #leeyee-elevator-ats-guide .ly-steps {\r\n    counter-reset: ly-step;\r\n    margin: 24px 0 32px;\r\n  }\r\n\r\n  #leeyee-elevator-ats-guide .ly-step {\r\n    position: relative;\r\n    margin: 0 0 27px;\r\n    padding: 0 0 0 52px;\r\n  }\r\n\r\n  #leeyee-elevator-ats-guide .ly-step::before {\r\n    counter-increment: ly-step;\r\n    content: counter(ly-step);\r\n    position: absolute;\r\n    top: 0;\r\n    left: 0;\r\n    display: grid;\r\n    place-items: center;\r\n    width: 34px;\r\n    height: 34px;\r\n    border-radius: 50%;\r\n    background: var(--ly-blue);\r\n    color: #fff;\r\n    font-size: 15px;\r\n    font-weight: 800;\r\n  }\r\n\r\n  #leeyee-elevator-ats-guide .ly-step h3 {\r\n    margin: 0 0 8px;\r\n    font-size: 21px;\r\n  }\r\n\r\n  #leeyee-elevator-ats-guide .ly-split {\r\n    display: grid;\r\n    grid-template-columns: repeat(2, minmax(0, 1fr));\r\n    gap: 18px;\r\n    margin: 22px 0 30px;\r\n  }\r\n\r\n  #leeyee-elevator-ats-guide .ly-split > div {\r\n    padding: 19px 20px;\r\n    border: 1px solid #dce6ee;\r\n    border-radius: 11px;\r\n    background: #fff;\r\n  }\r\n\r\n  #leeyee-elevator-ats-guide .ly-split h3 {\r\n    margin: 0 0 9px;\r\n    color: var(--ly-blue);\r\n    font-size: 20px;\r\n  }\r\n\r\n  #leeyee-elevator-ats-guide .ly-sequence {\r\n    margin: 24px 0 30px;\r\n    padding: 4px 0 4px 21px;\r\n    border-left: 2px solid #b8d0e4;\r\n  }\r\n\r\n  #leeyee-elevator-ats-guide .ly-sequence-item {\r\n    position: relative;\r\n    margin: 0 0 20px;\r\n    padding-left: 19px;\r\n  }\r\n\r\n  #leeyee-elevator-ats-guide .ly-sequence-item::before {\r\n    content: \"\";\r\n    position: absolute;\r\n    top: 8px;\r\n    left: -27px;\r\n    width: 10px;\r\n    height: 10px;\r\n    border-radius: 50%;\r\n    background: var(--ly-blue);\r\n    box-shadow: 0 0 0 4px #e5f0f9;\r\n  }\r\n\r\n  #leeyee-elevator-ats-guide .ly-sequence-item strong {\r\n    display: block;\r\n    margin-bottom: 3px;\r\n  }\r\n\r\n  #leeyee-elevator-ats-guide .ly-keyline {\r\n    margin: 22px 0;\r\n    padding-left: 17px;\r\n    border-left: 3px solid var(--ly-blue);\r\n    color: #34485b;\r\n  }\r\n\r\n  #leeyee-elevator-ats-guide .ly-cta {\r\n    border: 1px solid #bed4e7;\r\n    background: var(--ly-blue-pale);\r\n    text-align: center;\r\n  }\r\n\r\n  #leeyee-elevator-ats-guide .ly-cta p {\r\n    max-width: 680px;\r\n    margin-right: auto;\r\n    margin-left: auto;\r\n  }\r\n\r\n  #leeyee-elevator-ats-guide .leeyee-about-btn-light.leeyee-site-popup-btn {\r\n    -webkit-appearance: none;\r\n    appearance: none;\r\n    display: inline-flex;\r\n    align-items: center;\r\n    justify-content: center;\r\n    min-height: 50px;\r\n    margin: 5px 0 0;\r\n    padding: 12px 27px;\r\n    border: 2px solid #004898;\r\n    border-radius: 10px;\r\n    background: #fff;\r\n    color: #004898;\r\n    font: inherit;\r\n    font-size: 16px;\r\n    line-height: 1.25;\r\n    font-weight: 700;\r\n    text-align: center;\r\n    cursor: pointer;\r\n    box-shadow: 0 5px 14px rgba(0, 72, 152, 0.12);\r\n    transition:\r\n      background-color .2s ease,\r\n      color .2s ease,\r\n      transform .2s ease,\r\n      box-shadow .2s ease;\r\n  }\r\n\r\n  #leeyee-elevator-ats-guide .leeyee-about-btn-light.leeyee-site-popup-btn:hover {\r\n    background: #004898;\r\n    color: #fff;\r\n    transform: translateY(-1px);\r\n    box-shadow: 0 7px 18px rgba(0, 72, 152, 0.18);\r\n  }\r\n\r\n  #leeyee-elevator-ats-guide .leeyee-about-btn-light.leeyee-site-popup-btn:focus-visible {\r\n    outline: 3px solid rgba(0, 72, 152, 0.28);\r\n    outline-offset: 3px;\r\n  }\r\n\r\n  #leeyee-elevator-ats-guide .leeyee-about-btn-light.leeyee-site-popup-btn:active {\r\n    transform: translateY(0);\r\n  }\r\n\r\n  #leeyee-elevator-ats-guide .ly-faq {\r\n    margin: 20px 0 0;\r\n    border-top: 1px solid #dfe7ed;\r\n  }\r\n\r\n  #leeyee-elevator-ats-guide .ly-faq-item {\r\n    padding: 21px 0;\r\n    border-bottom: 1px solid #dfe7ed;\r\n  }\r\n\r\n  #leeyee-elevator-ats-guide .ly-faq-item h3 {\r\n    margin: 0 0 9px;\r\n    font-size: 20px;\r\n  }\r\n\r\n  #leeyee-elevator-ats-guide .ly-references {\r\n    margin-top: 53px;\r\n    padding-top: 3px;\r\n    border-top: 1px solid #d9e3eb;\r\n  }\r\n\r\n  #leeyee-elevator-ats-guide .ly-references li {\r\n    margin: 12px 0;\r\n    color: #4c5d6c;\r\n    font-size: 14px;\r\n    line-height: 1.6;\r\n  }\r\n\r\n  #leeyee-elevator-ats-guide .ly-ref {\r\n    white-space: nowrap;\r\n    font-size: .82em;\r\n    font-weight: 750;\r\n    text-decoration: none;\r\n  }\r\n\r\n  @media (max-width: 768px) {\r\n    #leeyee-elevator-ats-guide {\r\n      padding-right: 16px;\r\n      padding-left: 16px;\r\n      font-size: 16px;\r\n    }\r\n\r\n    #leeyee-elevator-ats-guide .ly-split {\r\n      grid-template-columns: 1fr;\r\n    }\r\n\r\n    #leeyee-elevator-ats-guide .ly-table-wrap {\r\n      border: 0;\r\n      box-shadow: none;\r\n      background: transparent;\r\n      overflow: visible;\r\n    }\r\n\r\n    #leeyee-elevator-ats-guide table,\r\n    #leeyee-elevator-ats-guide thead,\r\n    #leeyee-elevator-ats-guide tbody,\r\n    #leeyee-elevator-ats-guide th,\r\n    #leeyee-elevator-ats-guide td,\r\n    #leeyee-elevator-ats-guide tr {\r\n      display: block;\r\n      width: 100%;\r\n    }\r\n\r\n    #leeyee-elevator-ats-guide thead {\r\n      position: absolute;\r\n      width: 1px;\r\n      height: 1px;\r\n      overflow: hidden;\r\n      clip: rect(0 0 0 0);\r\n      white-space: nowrap;\r\n    }\r\n\r\n    #leeyee-elevator-ats-guide tbody tr {\r\n      margin: 0 0 14px;\r\n      border: 1px solid #dce6ee;\r\n      border-radius: 10px;\r\n      background: #fff !important;\r\n      overflow: hidden;\r\n    }\r\n\r\n    #leeyee-elevator-ats-guide tbody td {\r\n      display: grid;\r\n      grid-template-columns: minmax(112px, 38%) minmax(0, 1fr);\r\n      gap: 12px;\r\n      padding: 12px 14px;\r\n    }\r\n\r\n    #leeyee-elevator-ats-guide tbody td::before {\r\n      content: attr(data-label);\r\n      color: var(--ly-blue);\r\n      font-weight: 750;\r\n    }\r\n  }\r\n\r\n  @media (max-width: 540px) {\r\n    #leeyee-elevator-ats-guide {\r\n      padding-right: 14px;\r\n      padding-left: 14px;\r\n    }\r\n\r\n    #leeyee-elevator-ats-guide .ly-intro {\r\n      font-size: 17px;\r\n    }\r\n\r\n    #leeyee-elevator-ats-guide .ly-step {\r\n      padding-left: 46px;\r\n    }\r\n\r\n    #leeyee-elevator-ats-guide .leeyee-about-btn-light.leeyee-site-popup-btn {\r\n      width: 100%;\r\n      min-height: 50px;\r\n      padding-right: 18px;\r\n      padding-left: 18px;\r\n    }\r\n\r\n    #leeyee-elevator-ats-guide tbody td {\r\n      grid-template-columns: 1fr;\r\n      gap: 4px;\r\n    }\r\n  }\r\n<\/style>\r\n\r\n<article id=\"leeyee-elevator-ats-guide\">\r\n\r\n  <div class=\"ly-kicker\">Engineering Selection Guide<\/div>\r\n\r\n  <p class=\"ly-intro\">\r\n    When an elevator or building system has both normal utility power and a standby source such as a generator, an automatic transfer switch can transfer the upstream feeder between those sources. The difficult part is not simply choosing an ATS with a large enough ampere rating. Elevator projects can also require coordination with the elevator controller, generator, neutral arrangement, transfer sequence and emergency operating strategy.\r\n  <\/p>\r\n\r\n  <div class=\"ly-definition\">\r\n    <strong>An elevator automatic transfer switch, or elevator ATS, is used on the upstream power-distribution side to transfer an elevator feeder between normal and standby power sources.<\/strong> It transfers electrical power; it does not replace the elevator controller or elevator safety functions.\r\n  <\/div>\r\n\r\n  <section class=\"ly-quick\">\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\/th\/elevator-building-automatic-transfer-switch\/#quick-answer-can-an-ats-be-used-for-elevator-backup-power\" >Quick Answer: Can an ATS Be Used for Elevator Backup Power?<\/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\/th\/elevator-building-automatic-transfer-switch\/#what-does-the-ats-actually-do-in-an-elevator-power-system\" >What Does the ATS Actually Do in an Elevator Power System?<\/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\/th\/elevator-building-automatic-transfer-switch\/#seven-things-to-confirm-before-selecting-an-elevator-ats\" >Seven Things to Confirm Before Selecting an Elevator ATS<\/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\/th\/elevator-building-automatic-transfer-switch\/#how-can-the-ats-and-elevator-controller-coordinate\" >How Can the ATS and Elevator Controller Coordinate?<\/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\/th\/elevator-building-automatic-transfer-switch\/#what-does-a-typical-utility-to-generator-transfer-sequence-look-like\" >What Does a Typical Utility-to-Generator Transfer Sequence Look Like?<\/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\/th\/elevator-building-automatic-transfer-switch\/#what-changes-when-one-ats-serves-multiple-elevators\" >What Changes When One ATS Serves Multiple Elevators?<\/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\/th\/elevator-building-automatic-transfer-switch\/#elevator-ats-selection-table\" >Elevator ATS Selection Table<\/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\/th\/elevator-building-automatic-transfer-switch\/#where-can-a-compact-leeyee-ats-fit\" >Where Can a Compact LEEYEE ATS Fit?<\/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\/th\/elevator-building-automatic-transfer-switch\/#when-does-the-project-need-more-than-a-standard-compact-ats\" >When Does the Project Need More Than a Standard Compact ATS?<\/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\/th\/elevator-building-automatic-transfer-switch\/#before-ordering-send-these-project-details\" >Before Ordering: Send These Project Details<\/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\/th\/elevator-building-automatic-transfer-switch\/#faq-for-elevator-ats-projects\" >FAQ for Elevator ATS Projects<\/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\/th\/elevator-building-automatic-transfer-switch\/#references\" >References<\/a><\/li><\/ul><\/nav><\/div>\n<h2><span class=\"ez-toc-section\" id=\"quick-answer-can-an-ats-be-used-for-elevator-backup-power\"><\/span>Quick Answer: Can an ATS Be Used for Elevator Backup Power?<span class=\"ez-toc-section-end\"><\/span><\/h2>\r\n    <p>\r\n      <strong>Yes. An ATS can transfer an elevator feeder between a normal source and an available standby source.<\/strong> A typical ATS monitors the power sources and transfers the connected load when the preferred source becomes unavailable and the alternate source is acceptable. <a class=\"ly-ref\" href=\"#ref-1\">[1]<\/a>\r\n    <\/p>\r\n    <p>\r\n      However, the ATS is only one part of the elevator emergency-power system. It does not replace the elevator controller, drive, braking system, rescue functions or other elevator safety controls. Elevator operation under emergency power must be coordinated with the elevator equipment requirements and project design. <a class=\"ly-ref\" href=\"#ref-2\">[2]<\/a>\r\n    <\/p>\r\n    <p>\r\n      <strong>For procurement:<\/strong> confirm the real feeder load, acceptable transfer type, pole configuration, generator capacity, controller signals and applicable project requirements before fixing the ATS model.\r\n    <\/p>\r\n  <\/section>\r\n\r\n  <figure class=\"ly-image\">\r\n    <img\r\n      src=\"https:\/\/www.cnspd.com\/wp-content\/uploads\/2026\/09\/elevator-generator-ats-power-system-diagram.webp\"\r\n      alt=\"Elevator generator automatic transfer switch power system diagram showing utility, ATS, generator, elevator distribution, controller, drive and auxiliary loads\"\r\n      loading=\"eager\"\r\n      decoding=\"async\">\r\n    <figcaption>\r\n      Typical elevator backup-power architecture. The ATS changes the upstream source while the elevator controller remains responsible for elevator operating logic.\r\n    <\/figcaption>\r\n  <\/figure>\r\n\r\n  <h2><span class=\"ez-toc-section\" id=\"what-does-the-ats-actually-do-in-an-elevator-power-system\"><\/span>What Does the ATS Actually Do in an Elevator Power System?<span class=\"ez-toc-section-end\"><\/span><\/h2>\r\n\r\n  <p>\r\n    An automatic transfer switch connects a load to one of two power sources. In a common utility-and-generator arrangement, the ATS monitors source conditions and transfers the load when the normal source is unavailable and the alternate source reaches acceptable conditions. <a class=\"ly-ref\" href=\"#ref-1\">[1]<\/a>\r\n  <\/p>\r\n\r\n  <p>\r\n    The elevator controller performs a different job. It manages elevator operation. On projects where emergency-power operation needs coordination, control wiring or status contacts may be required between the ATS and elevator controller. <a class=\"ly-ref\" href=\"#ref-2\">[2]<\/a><a class=\"ly-ref\" href=\"#ref-3\">[3]<\/a>\r\n  <\/p>\r\n\r\n  <div class=\"ly-warning\">\r\n    <strong>Important engineering boundary:<\/strong>\r\n    An ATS is not an elevator safety controller. Emergency operation, fire-service functions, rescue operation, braking and other elevator-specific functions remain subject to the elevator equipment design and applicable project requirements.\r\n  <\/div>\r\n\r\n  <h2><span class=\"ez-toc-section\" id=\"seven-things-to-confirm-before-selecting-an-elevator-ats\"><\/span>Seven Things to Confirm Before Selecting an Elevator ATS<span class=\"ez-toc-section-end\"><\/span><\/h2>\r\n\r\n  <div class=\"ly-steps\">\r\n\r\n    <div class=\"ly-step\">\r\n      <h3>Confirm the Actual Load, Not Only the Motor kW<\/h3>\r\n      <p>\r\n        ATS selection should start from the feeder and the loads that must operate from standby power. The elevator motor rating alone does not describe the complete emergency-power requirement.\r\n      <\/p>\r\n      <div class=\"ly-meaning\">\r\n        <strong>Buyer meaning:<\/strong> provide the elevator feeder data, drive information, number of elevators and emergency operating strategy instead of sending only a motor kW value.\r\n      <\/div>\r\n    <\/div>\r\n\r\n    <div class=\"ly-step\">\r\n      <h3>Confirm Whether Open-Transition Transfer Is Acceptable<\/h3>\r\n      <p>\r\n        Open-transition transfer is a <strong>break-before-make<\/strong> process: the ATS disconnects the load from one source before connecting it to the other source. This creates an interruption during transfer. <a class=\"ly-ref\" href=\"#ref-1\">[1]<\/a>\r\n      <\/p>\r\n      <p>\r\n        Whether that interruption is acceptable for a particular elevator controller and drive must be checked against the elevator manufacturer's requirements and electrical design.\r\n      <\/p>\r\n    <\/div>\r\n\r\n    <div class=\"ly-step\">\r\n      <h3>Confirm the Pole and Neutral Arrangement<\/h3>\r\n      <p>\r\n        The decision between a 3-pole and 4-pole ATS depends on the electrical system, source grounding, neutral arrangement, generator connection and project design.\r\n      <\/p>\r\n\r\n      <div class=\"ly-split\">\r\n        <div>\r\n          <h3>3-Pole Concept<\/h3>\r\n          <p>The three phase conductors are switched while neutral remains continuous.<\/p>\r\n        <\/div>\r\n        <div>\r\n          <h3>4-Pole Concept<\/h3>\r\n          <p>The three phase conductors and neutral are switched when required by the system design.<\/p>\r\n        <\/div>\r\n      <\/div>\r\n    <\/div>\r\n\r\n    <div class=\"ly-step\">\r\n      <h3>Confirm the Generator Start Sequence<\/h3>\r\n      <p>\r\n        A common sequence is: normal source becomes unavailable, the standby generator starts, the alternate source reaches acceptable conditions, and the ATS transfers the load. Exact thresholds and timing must be verified for the project. <a class=\"ly-ref\" href=\"#ref-1\">[1]<\/a>\r\n      <\/p>\r\n    <\/div>\r\n\r\n    <div class=\"ly-step\">\r\n      <h3>Confirm Whether the Controller Needs ATS Status Signals<\/h3>\r\n      <p>\r\n        Some elevator systems require ATS status, auxiliary contacts, source availability signals or pre-transfer coordination. These functions are project-dependent and should be confirmed with the elevator-controller documentation. <a class=\"ly-ref\" href=\"#ref-3\">[3]<\/a>\r\n      <\/p>\r\n    <\/div>\r\n\r\n    <div class=\"ly-step\">\r\n      <h3>Confirm Generator Capacity<\/h3>\r\n      <p>\r\n        Generator selection can be affected by elevator load data, drive characteristics, simultaneous operation and other standby loads. A universal percentage should not be assumed.\r\n      <\/p>\r\n    <\/div>\r\n\r\n    <div class=\"ly-step\">\r\n      <h3>Confirm Auxiliary Loads<\/h3>\r\n      <p>\r\n        Depending on the project, standby power may also need to support controller equipment, cab lighting, ventilation, communication or other elevator-related auxiliary systems.\r\n      <\/p>\r\n    <\/div>\r\n\r\n  <\/div>\r\n\r\n  <figure class=\"ly-image\">\r\n    <img\r\n      src=\"https:\/\/www.cnspd.com\/wp-content\/uploads\/2026\/09\/elevator-ats-controller-signal-interface-diagram.webp\"\r\n      alt=\"Elevator ATS and controller signal interface diagram showing generator start, source availability, emergency status and auxiliary contacts\"\r\n      loading=\"lazy\"\r\n      decoding=\"async\">\r\n    <figcaption>\r\n      Typical interface concept. Actual contacts, signal logic and terminal assignments must follow the approved ATS, elevator-controller and project documentation.\r\n    <\/figcaption>\r\n  <\/figure>\r\n\r\n  <h2><span class=\"ez-toc-section\" id=\"how-can-the-ats-and-elevator-controller-coordinate\"><\/span>How Can the ATS and Elevator Controller Coordinate?<span class=\"ez-toc-section-end\"><\/span><\/h2>\r\n\r\n  <p>\r\n    The ATS power circuit handles source transfer. Separately, auxiliary contacts or other approved interfaces may tell the elevator controller that emergency power is available, that the ATS has transferred or that a transfer sequence is about to occur.\r\n  <\/p>\r\n\r\n  <p>\r\n    Published engineering specifications include examples of elevator ATS systems using emergency-position contacts and pre-transfer signals. These examples demonstrate the need for coordination, but they should not be copied as universal wiring requirements. <a class=\"ly-ref\" href=\"#ref-3\">[3]<\/a>\r\n  <\/p>\r\n\r\n  <h2><span class=\"ez-toc-section\" id=\"what-does-a-typical-utility-to-generator-transfer-sequence-look-like\"><\/span>What Does a Typical Utility-to-Generator Transfer Sequence Look Like?<span class=\"ez-toc-section-end\"><\/span><\/h2>\r\n\r\n  <div class=\"ly-sequence\">\r\n    <div class=\"ly-sequence-item\">\r\n      <strong>1. Normal source supplies the elevator feeder.<\/strong>\r\n    <\/div>\r\n    <div class=\"ly-sequence-item\">\r\n      <strong>2. The ATS detects that the normal source is unacceptable.<\/strong>\r\n    <\/div>\r\n    <div class=\"ly-sequence-item\">\r\n      <strong>3. The standby generator receives the start command.<\/strong>\r\n    <\/div>\r\n    <div class=\"ly-sequence-item\">\r\n      <strong>4. The alternate source reaches acceptable conditions.<\/strong>\r\n    <\/div>\r\n    <div class=\"ly-sequence-item\">\r\n      <strong>5. The ATS transfers the feeder according to the approved sequence.<\/strong>\r\n    <\/div>\r\n    <div class=\"ly-sequence-item\">\r\n      <strong>6. Elevator emergency-power logic operates according to the controller design.<\/strong>\r\n    <\/div>\r\n  <\/div>\r\n\r\n  <h2><span class=\"ez-toc-section\" id=\"what-changes-when-one-ats-serves-multiple-elevators\"><\/span>What Changes When One ATS Serves Multiple Elevators?<span class=\"ez-toc-section-end\"><\/span><\/h2>\r\n\r\n  <p>\r\n    A multiple-elevator system raises an important question: <strong>how many elevators are required or permitted to operate simultaneously while the building is on standby power?<\/strong>\r\n  <\/p>\r\n\r\n  <p>\r\n    This affects generator loading, group-control logic and the coordination between the power system and elevator controls. DoD and GSA design documents provide examples where simultaneous elevator operation and group control must be considered. <a class=\"ly-ref\" href=\"#ref-2\">[2]<\/a><a class=\"ly-ref\" href=\"#ref-5\">[5]<\/a>\r\n  <\/p>\r\n\r\n  <h2><span class=\"ez-toc-section\" id=\"elevator-ats-selection-table\"><\/span>Elevator ATS Selection Table<span class=\"ez-toc-section-end\"><\/span><\/h2>\r\n\r\n  <div class=\"ly-table-wrap\">\r\n    <table>\r\n      <thead>\r\n        <tr>\r\n          <th>Selection Question<\/th>\r\n          <th>What to Check<\/th>\r\n          <th>Why It Matters<\/th>\r\n        <\/tr>\r\n      <\/thead>\r\n      <tbody>\r\n        <tr>\r\n          <td data-label=\"Question\"><strong>What load is transferred?<\/strong><\/td>\r\n          <td data-label=\"Check\">Elevator feeder and required auxiliary loads<\/td>\r\n          <td data-label=\"Why It Matters\">Defines the load the ATS must carry.<\/td>\r\n        <\/tr>\r\n        <tr>\r\n          <td data-label=\"Question\"><strong>Which sources?<\/strong><\/td>\r\n          <td data-label=\"Check\">Utility and generator or other approved standby source<\/td>\r\n          <td data-label=\"Why It Matters\">Defines the transfer arrangement.<\/td>\r\n        <\/tr>\r\n        <tr>\r\n          <td data-label=\"Question\"><strong>Open transition acceptable?<\/strong><\/td>\r\n          <td data-label=\"Check\">Controller and project requirements<\/td>\r\n          <td data-label=\"Why It Matters\">Open transition includes an interruption.<\/td>\r\n        <\/tr>\r\n        <tr>\r\n          <td data-label=\"Question\"><strong>3P or 4P?<\/strong><\/td>\r\n          <td data-label=\"Check\">Neutral and grounding arrangement<\/td>\r\n          <td data-label=\"Why It Matters\">Determines whether neutral is switched.<\/td>\r\n        <\/tr>\r\n        <tr>\r\n          <td data-label=\"Question\"><strong>Controller interface?<\/strong><\/td>\r\n          <td data-label=\"Check\">Dry contacts and required signals<\/td>\r\n          <td data-label=\"Why It Matters\">Some projects require ATS-controller coordination.<\/td>\r\n        <\/tr>\r\n      <\/tbody>\r\n    <\/table>\r\n  <\/div>\r\n\r\n  <figure class=\"ly-image\">\r\n    <img\r\n      src=\"https:\/\/www.cnspd.com\/wp-content\/uploads\/2026\/09\/elevator-ats-selection-flowchart.webp\"\r\n      alt=\"Elevator automatic transfer switch selection flowchart for load, open transition, poles, generator, controller signals and project requirements\"\r\n      loading=\"lazy\"\r\n      decoding=\"async\">\r\n    <figcaption>\r\n      Confirm the power system and elevator requirements first, then select the ATS configuration against the approved project documents.\r\n    <\/figcaption>\r\n  <\/figure>\r\n\r\n  <h2><span class=\"ez-toc-section\" id=\"where-can-a-compact-leeyee-ats-fit\"><\/span>Where Can a Compact LEEYEE ATS Fit?<span class=\"ez-toc-section-end\"><\/span><\/h2>\r\n\r\n  <div class=\"ly-product-scope\">\r\n    <h3>LEEYEE Product Scope<\/h3>\r\n    <p>\r\n      LEEYEE supplies compact integrated automatic transfer switches for straightforward normal-to-standby power transfer. These products are intended to act as upstream source-transfer devices rather than elevator control or safety equipment.\r\n    <\/p>\r\n    <p>\r\n      For an elevator or building project, suitability must still be confirmed against the required current, pole configuration, system voltage, transition method, controller interface and project documentation.\r\n    <\/p>\r\n  <\/div>\r\n\r\n  <figure class=\"ly-product-image\">\r\n    <img\r\n      src=\"https:\/\/www.cnspd.com\/wp-content\/uploads\/2026\/06\/2.png\"\r\n      alt=\"LEEYEE compact 2P and 4P automatic transfer switches for utility and generator backup power applications\"\r\n      loading=\"lazy\"\r\n      decoding=\"async\">\r\n    <figcaption>\r\n      LEEYEE compact ATS product example. The image shows compact integrated 2-pole and 4-pole configurations for normal and standby source transfer. Project suitability must be confirmed from the required electrical parameters and control functions.\r\n    <\/figcaption>\r\n  <\/figure>\r\n\r\n  <p>\r\n    This compact form factor can be appropriate for panel builders, electrical contractors and OEM projects that need conventional automatic source transfer and where open-transition operation is acceptable.\r\n  <\/p>\r\n\r\n  <div class=\"ly-warning\">\r\n    <strong>Do not treat this product as a dedicated elevator safety device.<\/strong>\r\n    It is a general-purpose compact ATS that may be used as the upstream transfer component in an elevator or building backup-power system when the project requirements match its actual specifications.\r\n  <\/div>\r\n\r\n  <h2><span class=\"ez-toc-section\" id=\"when-does-the-project-need-more-than-a-standard-compact-ats\"><\/span>When Does the Project Need More Than a Standard Compact ATS?<span class=\"ez-toc-section-end\"><\/span><\/h2>\r\n\r\n  <div class=\"ly-split\">\r\n    <div>\r\n      <h3>Requires Extra Review<\/h3>\r\n      <ul>\r\n        <li>Closed-transition requirement<\/li>\r\n        <li>Bypass-isolation architecture<\/li>\r\n        <li>Special continuity requirements<\/li>\r\n        <li>Complex multi-elevator sequencing<\/li>\r\n        <li>Project-specific load shedding<\/li>\r\n      <\/ul>\r\n    <\/div>\r\n\r\n    <div>\r\n      <h3>Do Not Assume<\/h3>\r\n      <ul>\r\n        <li>A larger current rating solves control issues<\/li>\r\n        <li>4P is automatically better than 3P<\/li>\r\n        <li>Every elevator accepts open transition<\/li>\r\n        <li>Every controller uses the same dry contacts<\/li>\r\n        <li>One generator-sizing rule fits every project<\/li>\r\n      <\/ul>\r\n    <\/div>\r\n  <\/div>\r\n\r\n  <section class=\"ly-checklist\">\r\n    <h2><span class=\"ez-toc-section\" id=\"before-ordering-send-these-project-details\"><\/span>Before Ordering: Send These Project Details<span class=\"ez-toc-section-end\"><\/span><\/h2>\r\n    <ol>\r\n      <li>System voltage and frequency<\/li>\r\n      <li>Single-phase or three-phase supply<\/li>\r\n      <li>Normal source type<\/li>\r\n      <li>Standby source and generator information<\/li>\r\n      <li>Elevator feeder rated current<\/li>\r\n      <li>Required 2P, 3P or 4P configuration<\/li>\r\n      <li>Neutral and grounding arrangement<\/li>\r\n      <li>Number of elevators<\/li>\r\n      <li>Required simultaneous or sequential operation<\/li>\r\n      <li>Elevator-controller interface requirements<\/li>\r\n      <li>Required dry contacts or status signals<\/li>\r\n      <li>Single-line diagram, project specification and required certification<\/li>\r\n    <\/ol>\r\n  <\/section>\r\n\r\n  <section class=\"ly-cta\">\r\n    <h3>Need to Confirm an Elevator ATS Configuration?<\/h3>\r\n    <p>\r\n      Send the system voltage, feeder current, pole requirement, generator information, elevator-controller requirements and project drawing. LEEYEE can review the ATS-side selection scope and identify which items still require project confirmation.\r\n    <\/p>\r\n\r\n    <button\r\n      type=\"button\"\r\n      class=\"leeyee-about-btn-light leeyee-site-popup-btn\"\r\n      aria-label=\"Share Your Elevator Power Requirements\">\r\n      <span class=\"w-btn-label\">Share Your Elevator Power Requirements<\/span>\r\n    <\/button>\r\n  <\/section>\r\n\r\n  <h2><span class=\"ez-toc-section\" id=\"faq-for-elevator-ats-projects\"><\/span>FAQ for Elevator ATS Projects<span class=\"ez-toc-section-end\"><\/span><\/h2>\r\n\r\n  <div class=\"ly-faq\">\r\n\r\n    <div class=\"ly-faq-item\">\r\n      <h3>Can a compact automatic transfer switch be used for an elevator?<\/h3>\r\n      <p>\r\n        It can be used as the upstream source-transfer device when the electrical rating, transfer method and project requirements are compatible. It does not replace elevator control or safety equipment.\r\n      <\/p>\r\n    <\/div>\r\n\r\n    <div class=\"ly-faq-item\">\r\n      <h3>Can an open-transition ATS be used for an elevator?<\/h3>\r\n      <p>\r\n        It may be suitable when the elevator controller, drive and project design permit an interruption during source transfer. This must be confirmed rather than assumed.\r\n      <\/p>\r\n    <\/div>\r\n\r\n    <div class=\"ly-faq-item\">\r\n      <h3>Should an elevator ATS be 3P or 4P?<\/h3>\r\n      <p>\r\n        The correct choice depends on the neutral arrangement, grounding system, generator connection and electrical design.\r\n      <\/p>\r\n    <\/div>\r\n\r\n    <div class=\"ly-faq-item\">\r\n      <h3>Can one ATS supply multiple elevators?<\/h3>\r\n      <p>\r\n        Yes, as part of an engineered system, but the required simultaneous operation, generator capacity and group-control strategy must be confirmed. <a class=\"ly-ref\" href=\"#ref-2\">[2]<\/a><a class=\"ly-ref\" href=\"#ref-5\">[5]<\/a>\r\n      <\/p>\r\n    <\/div>\r\n\r\n    <div class=\"ly-faq-item\">\r\n      <h3>Is a LEEYEE compact ATS an elevator-specific controller?<\/h3>\r\n      <p>\r\n        No. It is an automatic source-transfer device. In an elevator project it should be treated as part of the upstream power-distribution system, while elevator operating and safety functions remain with the elevator equipment.\r\n      <\/p>\r\n    <\/div>\r\n\r\n  <\/div>\r\n\r\n  <section class=\"ly-references\">\r\n    <h2><span class=\"ez-toc-section\" id=\"references\"><\/span>References<span class=\"ez-toc-section-end\"><\/span><\/h2>\r\n    <ol>\r\n      <li id=\"ref-1\">\r\n        Eaton. <em>Fundamentals of Automatic Transfer Switches (ATS)<\/em>.\r\n        <a href=\"https:\/\/www.eaton.com\/my\/en-us\/products\/low-voltage-power-distribution-control-systems\/automatic-transfer-switches\/automatic-transfer-switch-fundamentals.html\" target=\"_blank\" rel=\"noopener noreferrer\">Official Eaton source<\/a>.\r\n      <\/li>\r\n\r\n      <li id=\"ref-2\">\r\n        U.S. Department of Defense \/ Whole Building Design Guide. <em>UFC 3-490-06, Elevators<\/em>.\r\n        <a href=\"https:\/\/www.wbdg.org\/FFC\/DOD\/UFC\/ufc_3_490_06_2018_c1_rev2.pdf\" target=\"_blank\" rel=\"noopener noreferrer\">Official WBDG source<\/a>.\r\n      <\/li>\r\n\r\n      <li id=\"ref-3\">\r\n        University of Houston. <em>Master Specification 26 36 23 \u2014 Automatic Transfer Switches<\/em>.\r\n        <a href=\"https:\/\/www.uh.edu\/facilities-planning-construction\/vendor-resources\/owners-design-criteria\/master-specs\/pdf\/26-36-23-automatic-transfer-switches.pdf\" target=\"_blank\" rel=\"noopener noreferrer\">University of Houston source<\/a>.\r\n      <\/li>\r\n\r\n      <li id=\"ref-4\">\r\n        ASME. <em>ASME A17.1 \/ CSA B44 \u2014 Safety Code for Elevators and Escalators<\/em>.\r\n        <a href=\"https:\/\/www.asme.org\/codes-standards\/find-codes-standards\/safety-code-for-elevators-and-escalators\" target=\"_blank\" rel=\"noopener noreferrer\">Official ASME source<\/a>.\r\n      <\/li>\r\n\r\n      <li id=\"ref-5\">\r\n        U.S. General Services Administration. <em>2024 P100 \u2014 Facilities Standards for the Public Buildings Service<\/em>.\r\n        <a href=\"https:\/\/www.gsa.gov\/real-estate\/facilities-standards-for-the-public-buildings-service\" target=\"_blank\" rel=\"noopener noreferrer\">Official GSA source<\/a>.\r\n      <\/li>\r\n    <\/ol>\r\n  <\/section>\r\n\r\n<\/article>\r\n\r\n<script>\r\ndocument.addEventListener('DOMContentLoaded', function () {\r\n  var aboutPopupButtons = document.querySelectorAll('.leeyee-site-popup-btn');\r\n\r\n  aboutPopupButtons.forEach(function (button) {\r\n    button.addEventListener('click', function () {\r\n      var realPopupTrigger = document.querySelector(\r\n        '.w-popup.ush_popup_1 .w-popup-trigger'\r\n      );\r\n\r\n      if (realPopupTrigger) {\r\n        realPopupTrigger.click();\r\n      } else {\r\n        window.open(\r\n          'https:\/\/www.cnspd.com\/contact\/',\r\n          '_blank',\r\n          'noopener'\r\n        );\r\n      }\r\n    });\r\n  });\r\n});\r\n<\/script>\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>Engineering Selection GuideWhen an elevator or building system has both normal utility power and a standby source such as a generator, an automatic transfer switch can transfer the upstream feeder between those sources. The difficult part is not simply choosing an ATS with a large enough ampere rating. Elevator projects can also require coordination with&#8230;<\/p>","protected":false},"author":18,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[490,1,422],"tags":[],"class_list":["post-31544","post","type-post","status-publish","format-standard","hentry","category-isolator-switching","category-news","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>Automatic Transfer Switch for Elevators | ATS &amp; Generator Guide | LEEYEE<\/title>\n<meta name=\"description\" content=\"Learn how to select an automatic transfer switch for elevator backup power, including generator coordination, open-transition operation, 3P vs 4P selection, controller signals and project requirements.\" \/>\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\/th\/elevator-building-automatic-transfer-switch\/\" \/>\n<meta property=\"og:locale\" content=\"th_TH\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Automatic Transfer Switch for Elevators | ATS &amp; Generator Guide | LEEYEE\" \/>\n<meta property=\"og:description\" content=\"Learn how to select an automatic transfer switch for elevator backup power, including generator coordination, open-transition operation, 3P vs 4P selection, controller signals and project requirements.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.cnspd.com\/th\/elevator-building-automatic-transfer-switch\/\" \/>\n<meta property=\"og:site_name\" content=\"Surge Protector, Surge Arrestor, Isolating Switch - 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