{"id":31513,"date":"2026-10-07T13:45:32","date_gmt":"2026-10-07T05:45:32","guid":{"rendered":"https:\/\/www.cnspd.com\/?p=31513"},"modified":"2026-10-07T14:32:01","modified_gmt":"2026-10-07T06:32:01","slug":"automatic-transfer-switch-for-hotels-compact-ats-selection-for-backup-circuits","status":"publish","type":"post","link":"https:\/\/www.cnspd.com\/it\/hotel-automatic-transfer-switch\/","title":{"rendered":"Automatic Transfer Switch for Hotels: Compact ATS Selection for Backup Circuits"},"content":{"rendered":"\t\t<div data-elementor-type=\"wp-post\" data-elementor-id=\"31513\" class=\"elementor elementor-31513\" data-elementor-post-type=\"post\">\n\t\t\t\t<div class=\"elementor-element elementor-element-2d23836 e-flex e-con-boxed e-con e-parent\" data-id=\"2d23836\" 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-7a3379f elementor-widget elementor-widget-html\" data-id=\"7a3379f\" 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-hotel-ats-guide {\r\n  --ly-blue: #004898;\r\n  --ly-blue-dark: #00376f;\r\n  --ly-blue-soft: #eef5ff;\r\n  --ly-blue-softer: #f7fbff;\r\n  --ly-text: #27313d;\r\n  --ly-muted: #5e6b78;\r\n  --ly-border: #dbe5ee;\r\n  --ly-border-strong: #bfd2e2;\r\n  --ly-warning-bg: #fffaf0;\r\n  --ly-warning-border: #e5b85c;\r\n  --ly-success-bg: #f4faf7;\r\n  --ly-success-border: #7bb696;\r\n  --ly-white: #ffffff;\r\n  --ly-shadow: 0 8px 24px rgba(30, 65, 95, 0.07);\r\n  width: 100%;\r\n  max-width: 860px;\r\n  margin: 0 auto;\r\n  color: var(--ly-text);\r\n  font-size: 17px;\r\n  line-height: 1.72;\r\n  box-sizing: border-box;\r\n}\r\n\r\n#leeyee-hotel-ats-guide *,\r\n#leeyee-hotel-ats-guide *::before,\r\n#leeyee-hotel-ats-guide *::after {\r\n  box-sizing: border-box;\r\n}\r\n\r\n#leeyee-hotel-ats-guide p {\r\n  margin: 0 0 18px;\r\n}\r\n\r\n#leeyee-hotel-ats-guide h2 {\r\n  margin: 52px 0 20px;\r\n  color: #182431;\r\n  font-size: 31px;\r\n  line-height: 1.25;\r\n  font-weight: 750;\r\n  letter-spacing: -0.02em;\r\n}\r\n\r\n#leeyee-hotel-ats-guide h3 {\r\n  margin: 32px 0 14px;\r\n  color: #1d2a36;\r\n  font-size: 23px;\r\n  line-height: 1.32;\r\n  font-weight: 730;\r\n}\r\n\r\n#leeyee-hotel-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-hotel-ats-guide a:hover {\r\n  color: var(--ly-blue-dark);\r\n}\r\n\r\n#leeyee-hotel-ats-guide strong {\r\n  font-weight: 730;\r\n  color: #17232f;\r\n}\r\n\r\n#leeyee-hotel-ats-guide .leeyee-article-intro {\r\n  margin: 0 0 26px;\r\n  padding: 4px 0 0;\r\n}\r\n\r\n#leeyee-hotel-ats-guide .leeyee-article-label {\r\n  display: inline-flex;\r\n  align-items: center;\r\n  gap: 7px;\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: 750;\r\n  letter-spacing: 0.06em;\r\n  text-transform: uppercase;\r\n}\r\n\r\n#leeyee-hotel-ats-guide .leeyee-article-label::before {\r\n  content: \"\";\r\n  width: 22px;\r\n  height: 3px;\r\n  border-radius: 99px;\r\n  background: var(--ly-blue);\r\n}\r\n\r\n#leeyee-hotel-ats-guide .leeyee-lead {\r\n  margin: 0 0 14px;\r\n  color: #24313d;\r\n  font-size: 19px;\r\n  line-height: 1.7;\r\n}\r\n\r\n#leeyee-hotel-ats-guide .leeyee-scope-note {\r\n  margin: 18px 0 0;\r\n  padding: 14px 17px;\r\n  border-left: 3px solid var(--ly-blue);\r\n  background: var(--ly-blue-softer);\r\n  color: #42505e;\r\n  font-size: 15.5px;\r\n  line-height: 1.65;\r\n}\r\n\r\n#leeyee-hotel-ats-guide .leeyee-quick-answer {\r\n  margin: 26px 0 34px;\r\n  padding: 24px 26px;\r\n  border: 1px solid var(--ly-border-strong);\r\n  border-radius: 12px;\r\n  background: var(--ly-blue-softer);\r\n  box-shadow: var(--ly-shadow);\r\n}\r\n\r\n#leeyee-hotel-ats-guide .leeyee-quick-answer h2 {\r\n  margin: 0 0 13px;\r\n  font-size: 25px;\r\n}\r\n\r\n#leeyee-hotel-ats-guide .leeyee-selection-line {\r\n  margin: 18px 0 4px;\r\n  padding: 13px 16px;\r\n  border-radius: 9px;\r\n  background: var(--ly-white);\r\n  color: #173148;\r\n  font-size: 15.5px;\r\n  font-weight: 700;\r\n  line-height: 1.55;\r\n}\r\n\r\n#leeyee-hotel-ats-guide .leeyee-buyer-meaning {\r\n  margin: 20px 0;\r\n  padding: 16px 18px;\r\n  border-left: 4px solid var(--ly-blue);\r\n  background: var(--ly-blue-softer);\r\n  color: #354556;\r\n}\r\n\r\n#leeyee-hotel-ats-guide .leeyee-buyer-meaning strong {\r\n  display: block;\r\n  margin-bottom: 4px;\r\n  color: var(--ly-blue);\r\n}\r\n\r\n#leeyee-hotel-ats-guide .leeyee-warning {\r\n  margin: 24px 0;\r\n  padding: 18px 20px;\r\n  border: 1px solid #ead19a;\r\n  border-left: 4px solid var(--ly-warning-border);\r\n  border-radius: 10px;\r\n  background: var(--ly-warning-bg);\r\n}\r\n\r\n#leeyee-hotel-ats-guide .leeyee-engineering-note {\r\n  margin: 24px 0;\r\n  padding: 18px 20px;\r\n  border: 1px solid #cfe0d7;\r\n  border-left: 4px solid var(--ly-success-border);\r\n  border-radius: 10px;\r\n  background: var(--ly-success-bg);\r\n}\r\n\r\n#leeyee-hotel-ats-guide .leeyee-warning strong,\r\n#leeyee-hotel-ats-guide .leeyee-engineering-note strong {\r\n  display: block;\r\n  margin-bottom: 6px;\r\n}\r\n\r\n#leeyee-hotel-ats-guide .leeyee-image {\r\n  margin: 28px 0 34px;\r\n}\r\n\r\n#leeyee-hotel-ats-guide .leeyee-image img {\r\n  display: block;\r\n  width: 100%;\r\n  height: auto;\r\n  margin: 0;\r\n  border: 1px solid var(--ly-border);\r\n  border-radius: 12px;\r\n  background: #fff;\r\n  box-shadow: 0 5px 20px rgba(24, 56, 82, 0.07);\r\n}\r\n\r\n#leeyee-hotel-ats-guide .leeyee-product-image img {\r\n  max-width: 720px;\r\n  margin-left: auto;\r\n  margin-right: auto;\r\n  object-fit: contain;\r\n}\r\n\r\n#leeyee-hotel-ats-guide .leeyee-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}\r\n\r\n#leeyee-hotel-ats-guide .leeyee-table-wrap {\r\n  width: 100%;\r\n  margin: 22px 0 28px;\r\n  overflow-x: auto;\r\n  border: 1px solid var(--ly-border);\r\n  border-radius: 10px;\r\n  background: #fff;\r\n  -webkit-overflow-scrolling: touch;\r\n}\r\n\r\n#leeyee-hotel-ats-guide table {\r\n  width: 100%;\r\n  min-width: 680px;\r\n  margin: 0;\r\n  border-collapse: collapse;\r\n  font-size: 15px;\r\n  line-height: 1.5;\r\n}\r\n\r\n#leeyee-hotel-ats-guide thead th {\r\n  padding: 13px 14px;\r\n  background: var(--ly-blue);\r\n  color: #fff;\r\n  text-align: left;\r\n  vertical-align: top;\r\n  font-weight: 700;\r\n}\r\n\r\n#leeyee-hotel-ats-guide tbody td {\r\n  padding: 13px 14px;\r\n  border-top: 1px solid var(--ly-border);\r\n  vertical-align: top;\r\n}\r\n\r\n#leeyee-hotel-ats-guide tbody tr:nth-child(even) {\r\n  background: #fbfdff;\r\n}\r\n\r\n#leeyee-hotel-ats-guide ul,\r\n#leeyee-hotel-ats-guide ol {\r\n  margin: 12px 0 20px;\r\n  padding-left: 24px;\r\n}\r\n\r\n#leeyee-hotel-ats-guide li {\r\n  margin: 7px 0;\r\n}\r\n\r\n#leeyee-hotel-ats-guide .leeyee-step-list {\r\n  margin: 24px 0 28px;\r\n  padding: 0;\r\n  list-style: none;\r\n  counter-reset: ats-step;\r\n}\r\n\r\n#leeyee-hotel-ats-guide .leeyee-step-list li {\r\n  position: relative;\r\n  margin: 0 0 15px;\r\n  padding: 16px 18px 16px 58px;\r\n  border: 1px solid var(--ly-border);\r\n  border-radius: 10px;\r\n  background: #fff;\r\n}\r\n\r\n#leeyee-hotel-ats-guide .leeyee-step-list li::before {\r\n  counter-increment: ats-step;\r\n  content: counter(ats-step);\r\n  position: absolute;\r\n  top: 17px;\r\n  left: 17px;\r\n  width: 27px;\r\n  height: 27px;\r\n  border-radius: 50%;\r\n  background: var(--ly-blue);\r\n  color: #fff;\r\n  font-size: 14px;\r\n  line-height: 27px;\r\n  font-weight: 750;\r\n  text-align: center;\r\n}\r\n\r\n#leeyee-hotel-ats-guide .leeyee-step-list strong {\r\n  display: block;\r\n  margin-bottom: 3px;\r\n}\r\n\r\n#leeyee-hotel-ats-guide .leeyee-sequence {\r\n  margin: 22px 0 30px;\r\n  padding: 0;\r\n  list-style: none;\r\n}\r\n\r\n#leeyee-hotel-ats-guide .leeyee-sequence li {\r\n  position: relative;\r\n  margin: 0 0 11px;\r\n  padding: 14px 18px 14px 43px;\r\n  border: 1px solid var(--ly-border);\r\n  border-radius: 9px;\r\n  background: #fff;\r\n}\r\n\r\n#leeyee-hotel-ats-guide .leeyee-sequence li::before {\r\n  content: \"\u2192\";\r\n  position: absolute;\r\n  left: 17px;\r\n  top: 12px;\r\n  color: var(--ly-blue);\r\n  font-weight: 800;\r\n}\r\n\r\n#leeyee-hotel-ats-guide .leeyee-mini-grid {\r\n  display: grid;\r\n  grid-template-columns: repeat(2, minmax(0, 1fr));\r\n  gap: 14px;\r\n  margin: 22px 0 28px;\r\n}\r\n\r\n#leeyee-hotel-ats-guide .leeyee-mini-card {\r\n  padding: 17px 18px;\r\n  border: 1px solid var(--ly-border);\r\n  border-radius: 10px;\r\n  background: #fff;\r\n}\r\n\r\n#leeyee-hotel-ats-guide .leeyee-mini-card strong {\r\n  display: block;\r\n  margin-bottom: 5px;\r\n  color: var(--ly-blue);\r\n}\r\n\r\n#leeyee-hotel-ats-guide .leeyee-checklist {\r\n  margin: 24px 0 30px;\r\n  padding: 22px 24px;\r\n  border: 1px solid var(--ly-border-strong);\r\n  border-radius: 12px;\r\n  background: var(--ly-blue-softer);\r\n}\r\n\r\n#leeyee-hotel-ats-guide .leeyee-checklist h3 {\r\n  margin-top: 0;\r\n}\r\n\r\n#leeyee-hotel-ats-guide .leeyee-checklist ul {\r\n  display: grid;\r\n  grid-template-columns: repeat(2, minmax(0, 1fr));\r\n  gap: 7px 24px;\r\n  margin-bottom: 0;\r\n}\r\n\r\n#leeyee-hotel-ats-guide .leeyee-cta {\r\n  margin: 30px 0 34px;\r\n  padding: 24px 25px;\r\n  border: 1px solid var(--ly-border-strong);\r\n  border-radius: 12px;\r\n  background: #fff;\r\n  box-shadow: var(--ly-shadow);\r\n}\r\n\r\n#leeyee-hotel-ats-guide .leeyee-cta h3 {\r\n  margin: 0 0 9px;\r\n  font-size: 22px;\r\n}\r\n\r\n#leeyee-hotel-ats-guide .leeyee-cta p {\r\n  margin-bottom: 16px;\r\n  color: #465564;\r\n}\r\n\r\n#leeyee-hotel-ats-guide .leeyee-about-btn-light {\r\n  appearance: none;\r\n  -webkit-appearance: none;\r\n  display: inline-flex;\r\n  align-items: center;\r\n  justify-content: center;\r\n  min-height: 50px;\r\n  max-width: 100%;\r\n  padding: 12px 24px;\r\n  border: 2px solid var(--ly-blue);\r\n  border-radius: 10px;\r\n  background: #fff;\r\n  color: var(--ly-blue);\r\n  box-shadow: 0 4px 12px rgba(0, 72, 152, 0.12);\r\n  cursor: pointer;\r\n  font-family: inherit;\r\n  font-size: 16px;\r\n  line-height: 1.3;\r\n  font-weight: 700;\r\n  text-align: center;\r\n  transition:\r\n    background-color 0.2s ease,\r\n    color 0.2s ease,\r\n    transform 0.2s ease,\r\n    box-shadow 0.2s ease;\r\n}\r\n\r\n#leeyee-hotel-ats-guide .leeyee-about-btn-light:hover {\r\n  background: var(--ly-blue);\r\n  color: #fff;\r\n  transform: translateY(-1px);\r\n  box-shadow: 0 7px 16px rgba(0, 72, 152, 0.18);\r\n}\r\n\r\n#leeyee-hotel-ats-guide .leeyee-about-btn-light: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-hotel-ats-guide .leeyee-about-btn-light .w-btn-label {\r\n  display: inline-block;\r\n}\r\n\r\n#leeyee-hotel-ats-guide .leeyee-faq {\r\n  margin: 22px 0 32px;\r\n  border-top: 1px solid var(--ly-border);\r\n}\r\n\r\n#leeyee-hotel-ats-guide .leeyee-faq-item {\r\n  padding: 21px 0;\r\n  border-bottom: 1px solid var(--ly-border);\r\n}\r\n\r\n#leeyee-hotel-ats-guide .leeyee-faq-item h3 {\r\n  margin: 0 0 9px;\r\n  font-size: 19px;\r\n  line-height: 1.4;\r\n}\r\n\r\n#leeyee-hotel-ats-guide .leeyee-related {\r\n  margin: 30px 0;\r\n  padding: 18px 20px;\r\n  border-left: 3px solid var(--ly-blue);\r\n  background: var(--ly-blue-softer);\r\n}\r\n\r\n#leeyee-hotel-ats-guide .leeyee-references {\r\n  margin-top: 50px;\r\n  padding-top: 4px;\r\n  border-top: 1px solid var(--ly-border);\r\n}\r\n\r\n#leeyee-hotel-ats-guide .leeyee-references h2 {\r\n  margin-top: 32px;\r\n}\r\n\r\n#leeyee-hotel-ats-guide .leeyee-references li {\r\n  margin-bottom: 12px;\r\n  color: #4d5a67;\r\n  font-size: 14px;\r\n  line-height: 1.6;\r\n  overflow-wrap: anywhere;\r\n}\r\n\r\n#leeyee-hotel-ats-guide sup {\r\n  font-size: 0.72em;\r\n  vertical-align: super;\r\n}\r\n\r\n@media (max-width: 768px) {\r\n  #leeyee-hotel-ats-guide {\r\n    font-size: 16px;\r\n  }\r\n\r\n  #leeyee-hotel-ats-guide h2 {\r\n    margin-top: 43px;\r\n    font-size: 27px;\r\n  }\r\n\r\n  #leeyee-hotel-ats-guide h3 {\r\n    font-size: 21px;\r\n  }\r\n\r\n  #leeyee-hotel-ats-guide .leeyee-mini-grid,\r\n  #leeyee-hotel-ats-guide .leeyee-checklist ul {\r\n    grid-template-columns: 1fr;\r\n  }\r\n\r\n  #leeyee-hotel-ats-guide .leeyee-quick-answer,\r\n  #leeyee-hotel-ats-guide .leeyee-cta,\r\n  #leeyee-hotel-ats-guide .leeyee-checklist {\r\n    padding: 20px;\r\n  }\r\n}\r\n\r\n@media (max-width: 600px) {\r\n  #leeyee-hotel-ats-guide .leeyee-table-wrap {\r\n    overflow: visible;\r\n    border: 0;\r\n    background: transparent;\r\n  }\r\n\r\n  #leeyee-hotel-ats-guide table,\r\n  #leeyee-hotel-ats-guide thead,\r\n  #leeyee-hotel-ats-guide tbody,\r\n  #leeyee-hotel-ats-guide th,\r\n  #leeyee-hotel-ats-guide td,\r\n  #leeyee-hotel-ats-guide tr {\r\n    display: block;\r\n    width: 100%;\r\n    min-width: 0;\r\n  }\r\n\r\n  #leeyee-hotel-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-hotel-ats-guide tbody tr {\r\n    margin: 0 0 14px;\r\n    padding: 8px 15px;\r\n    border: 1px solid var(--ly-border);\r\n    border-radius: 10px;\r\n    background: #fff;\r\n  }\r\n\r\n  #leeyee-hotel-ats-guide tbody td {\r\n    padding: 10px 0;\r\n    border: 0;\r\n    border-bottom: 1px solid #edf1f4;\r\n  }\r\n\r\n  #leeyee-hotel-ats-guide tbody td:last-child {\r\n    border-bottom: 0;\r\n  }\r\n\r\n  #leeyee-hotel-ats-guide tbody td::before {\r\n    content: attr(data-label);\r\n    display: block;\r\n    margin-bottom: 3px;\r\n    color: var(--ly-blue);\r\n    font-size: 12px;\r\n    font-weight: 750;\r\n    text-transform: uppercase;\r\n  }\r\n}\r\n\r\n@media (max-width: 480px) {\r\n  #leeyee-hotel-ats-guide h2 {\r\n    font-size: 25px;\r\n  }\r\n\r\n  #leeyee-hotel-ats-guide h3 {\r\n    font-size: 20px;\r\n  }\r\n\r\n  #leeyee-hotel-ats-guide .leeyee-about-btn-light {\r\n    width: 100%;\r\n  }\r\n}\r\n<\/style>\r\n\r\n<article id=\"leeyee-hotel-ats-guide\">\r\n  <div class=\"leeyee-article-intro\">\r\n    <div class=\"leeyee-article-label\">Hotel ATS Engineering Selection Guide<\/div>\r\n\r\n    <p class=\"leeyee-lead\">\r\n      Selecting an <strong>automatic transfer switch for a hotel<\/strong> starts with the backup-power circuit, not with the total electrical capacity of the building. For compact ATS applications, the project team should first identify the selected loads that need generator backup and then confirm current, pole configuration, generator interface and control requirements for that specific distribution circuit.\r\n    <\/p>\r\n\r\n    <p>\r\n      This guide is intended for hotel engineering teams, electrical contractors, generator-set integrators, distribution-board manufacturers, consultants, distributors and B2B buyers selecting a compact ATS for utility-to-generator backup applications.\r\n    <\/p>\r\n\r\n    <div class=\"leeyee-scope-note\">\r\n      <strong>Product scope:<\/strong> LEEYEE supplies compact integrated automatic transfer switches such as the 2P and 4P units shown below. This page does not present LEEYEE as a supplier of large bypass-isolation ATS cabinets, closed-transition switchgear or complete hotel emergency-power systems.\r\n    <\/div>\r\n  <\/div>\r\n\r\n  <section class=\"leeyee-quick-answer\">\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\/it\/hotel-automatic-transfer-switch\/#quick-answer-how-should-a-hotel-ats-be-selected\" >Quick Answer: How Should a Hotel ATS Be Selected?<\/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\/it\/hotel-automatic-transfer-switch\/#which-hotel-loads-should-be-connected-to-the-ats\" >Which Hotel Loads Should Be Connected to the ATS?<\/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\/it\/hotel-automatic-transfer-switch\/#one-hotel-does-not-necessarily-mean-one-ats\" >One Hotel Does Not Necessarily Mean One 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\/it\/hotel-automatic-transfer-switch\/#do-not-size-the-ats-from-the-hotel-main-incomer\" >Do Not Size the ATS From the Hotel Main Incomer<\/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\/it\/hotel-automatic-transfer-switch\/#motor-and-pump-loads-need-additional-checking\" >Motor and Pump Loads Need Additional Checking<\/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\/it\/hotel-automatic-transfer-switch\/#should-the-hotel-use-a-2p-or-4p-ats\" >Should the Hotel Use a 2P or 4P ATS?<\/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\/it\/hotel-automatic-transfer-switch\/#how-does-this-compact-ats-work-with-a-generator\" >How Does This Compact ATS Work With a Generator?<\/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\/it\/hotel-automatic-transfer-switch\/#why-transfer-delays-matter\" >Why Transfer Delays Matter<\/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\/it\/hotel-automatic-transfer-switch\/#is-open-transition-ats-suitable-for-this-application\" >Is Open-Transition ATS Suitable for This Application?<\/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\/it\/hotel-automatic-transfer-switch\/#what-about-remote-alarm-or-bms-monitoring\" >What About Remote Alarm or BMS Monitoring?<\/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\/it\/hotel-automatic-transfer-switch\/#use-the-applicable-transfer-switch-standard\" >Use the Applicable Transfer-Switch Standard<\/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\/it\/hotel-automatic-transfer-switch\/#a-practical-selection-process-for-this-compact-hotel-ats\" >A Practical Selection Process for This Compact Hotel ATS<\/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\/it\/hotel-automatic-transfer-switch\/#common-selection-mistakes\" >Common Selection Mistakes<\/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\/it\/hotel-automatic-transfer-switch\/#what-should-you-send-before-requesting-a-hotel-ats\" >What Should You Send Before Requesting a Hotel ATS?<\/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\/it\/hotel-automatic-transfer-switch\/#hotel-automatic-transfer-switch-faq\" >Hotel Automatic Transfer Switch FAQ<\/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\/it\/hotel-automatic-transfer-switch\/#references\" >References<\/a><\/li><\/ul><\/nav><\/div>\n<h2><span class=\"ez-toc-section\" id=\"quick-answer-how-should-a-hotel-ats-be-selected\"><\/span>Quick Answer: How Should a Hotel ATS Be Selected?<span class=\"ez-toc-section-end\"><\/span><\/h2>\r\n    <p>\r\n      Start with the actual backup circuit. Define which hotel loads the generator will support, calculate the design current of that circuit, check motor or pump starting behaviour, confirm single-phase or three-phase operation, decide whether the neutral must be switched, and then confirm generator-start, transfer-delay and remote-status requirements.\r\n    <\/p>\r\n\r\n    <div class=\"leeyee-selection-line\">\r\n      Backup Load List \u2192 Circuit Design Current \u2192 Motor Loads \u2192 Voltage &amp; Phase \u2192 2P \/ 4P \u2192 Generator Interface \u2192 Delay \u2192 Alarm \/ Status \u2192 ATS Model\r\n    <\/div>\r\n  <\/section>\r\n\r\n  <figure class=\"leeyee-image leeyee-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 circuits\"\r\n      loading=\"eager\"\r\n      decoding=\"async\">\r\n    <figcaption>\r\n      LEEYEE compact ATS models shown in 2P and 4P configurations, with A\/B source inputs, Auto\/Manual operation and load output. The exact model, current rating and project suitability must be confirmed against the product documentation and actual electrical design.\r\n    <\/figcaption>\r\n  <\/figure>\r\n\r\n  <div class=\"leeyee-buyer-meaning\">\r\n    <strong>Buyer meaning<\/strong>\r\n    This compact ATS is best evaluated at the backup-circuit or distribution-board level. Do not assume that one small ATS should transfer the entire electrical load of a large hotel.\r\n  <\/div>\r\n\r\n  <h2><span class=\"ez-toc-section\" id=\"which-hotel-loads-should-be-connected-to-the-ats\"><\/span>Which Hotel Loads Should Be Connected to the ATS?<span class=\"ez-toc-section-end\"><\/span><\/h2>\r\n\r\n  <p>\r\n    A hotel can contain lighting, security equipment, reception systems, pumps, communications, controls, refrigeration, HVAC equipment and many other loads. The project should not automatically place every load on the same compact ATS.\r\n  <\/p>\r\n\r\n  <p>\r\n    Instead, the engineer should identify a practical standby circuit or small group of selected circuits that match the generator strategy and the electrical rating of the selected ATS.\r\n  <\/p>\r\n\r\n  <div class=\"leeyee-table-wrap\">\r\n    <table>\r\n      <thead>\r\n        <tr>\r\n          <th>Load group<\/th>\r\n          <th>Typical consideration<\/th>\r\n          <th>ATS selection impact<\/th>\r\n        <\/tr>\r\n      <\/thead>\r\n      <tbody>\r\n        <tr>\r\n          <td data-label=\"Load group\">Essential lighting<\/td>\r\n          <td data-label=\"Typical consideration\">Selected lighting circuits may be included in the standby distribution design.<\/td>\r\n          <td data-label=\"ATS selection impact\">Include only the actual selected circuits in the load calculation.<\/td>\r\n        <\/tr>\r\n        <tr>\r\n          <td data-label=\"Load group\">Security \/ CCTV \/ access control<\/td>\r\n          <td data-label=\"Typical consideration\">Often low-power but operationally important.<\/td>\r\n          <td data-label=\"ATS selection impact\">Confirm whether these circuits are generator-backed, UPS-backed or both.<\/td>\r\n        <\/tr>\r\n        <tr>\r\n          <td data-label=\"Load group\">Reception \/ communication<\/td>\r\n          <td data-label=\"Typical consideration\">May require continuity during a utility outage.<\/td>\r\n          <td data-label=\"ATS selection impact\">ATS backup and UPS requirements should be considered separately.<\/td>\r\n        <\/tr>\r\n        <tr>\r\n          <td data-label=\"Load group\">Small pumps<\/td>\r\n          <td data-label=\"Typical consideration\">Motor starting may be higher than running current.<\/td>\r\n          <td data-label=\"ATS selection impact\">Confirm motor rating, starting method and generator response.<\/td>\r\n        <\/tr>\r\n        <tr>\r\n          <td data-label=\"Load group\">BMS \/ control circuits<\/td>\r\n          <td data-label=\"Typical consideration\">Low-load control circuits may be useful to keep available.<\/td>\r\n          <td data-label=\"ATS selection impact\">Check remote alarm or status requirements.<\/td>\r\n        <\/tr>\r\n        <tr>\r\n          <td data-label=\"Load group\">Large elevators \/ large HVAC \/ high-power pumps<\/td>\r\n          <td data-label=\"Typical consideration\">These can involve high starting current, regenerative operation or more complex switching requirements.<\/td>\r\n          <td data-label=\"ATS selection impact\">Do not assume a compact ATS is suitable. Require a dedicated engineering review.<\/td>\r\n        <\/tr>\r\n      <\/tbody>\r\n    <\/table>\r\n  <\/div>\r\n\r\n  <div class=\"leeyee-warning\">\r\n    <strong>Important product boundary<\/strong>\r\n    Large elevator groups, large HVAC plant, high-power pumps and whole-building main incomers should not be presented as automatic applications for this compact ATS. Confirm current, utilisation category, short-circuit performance, generator capacity and project design before specifying the product.\r\n  <\/div>\r\n\r\n  <figure class=\"leeyee-image\">\r\n    <img loading=\"lazy\"\r\n      src=\"https:\/\/www.cnspd.com\/wp-content\/uploads\/2026\/09\/hotel-backup-power-ats-architecture-diagram.webp\"\r\n      alt=\"Hotel backup power architecture showing utility, generator, compact ATS and selected standby loads\"\r\n      width=\"1448\"\r\n      height=\"1086\"\r\n      loading=\"lazy\"\r\n      decoding=\"async\">\r\n    <figcaption>\r\n      A hotel backup system can use a compact ATS for a selected standby distribution section. The ATS does not automatically need to carry every building load.\r\n    <\/figcaption>\r\n  <\/figure>\r\n\r\n  <h2><span class=\"ez-toc-section\" id=\"one-hotel-does-not-necessarily-mean-one-ats\"><\/span>One Hotel Does Not Necessarily Mean One ATS<span class=\"ez-toc-section-end\"><\/span><\/h2>\r\n\r\n  <p>\r\n    For a smaller hotel or a limited backup circuit, one compact ATS may transfer a defined group of selected loads. In a larger property, different backup circuits may use separate transfer devices at different distribution levels.\r\n  <\/p>\r\n\r\n  <p>\r\n    The correct design question is:\r\n    <strong>Which circuit needs source transfer, and is that circuit within the electrical capability of the selected ATS?<\/strong>\r\n  <\/p>\r\n\r\n  <div class=\"leeyee-mini-grid\">\r\n    <div class=\"leeyee-mini-card\">\r\n      <strong>Suitable compact application<\/strong>\r\n      Utility + generator \u2192 compact ATS \u2192 selected essential distribution circuit.\r\n    <\/div>\r\n\r\n    <div class=\"leeyee-mini-card\">\r\n      <strong>Larger-system application<\/strong>\r\n      Main switchboards, large mechanical loads or multiple high-current feeders may require a larger engineered transfer-switch solution outside this compact ATS range.\r\n    <\/div>\r\n  <\/div>\r\n\r\n  <h2><span class=\"ez-toc-section\" id=\"do-not-size-the-ats-from-the-hotel-main-incomer\"><\/span>Do Not Size the ATS From the Hotel Main Incomer<span class=\"ez-toc-section-end\"><\/span><\/h2>\r\n\r\n  <p>\r\n    The hotel main incomer can be much larger than the standby circuit served by a compact ATS. If the generator only supplies selected lighting, security, reception systems, controls or other limited loads, the ATS should be evaluated from the current and electrical characteristics of that specific backup circuit.\r\n  <\/p>\r\n\r\n  <div class=\"leeyee-buyer-meaning\">\r\n    <strong>Engineering meaning<\/strong>\r\n    Hotel main-service current and compact ATS rated current are different design questions. Select the ATS from the circuit that actually passes through the device.\r\n  <\/div>\r\n\r\n  <h3>Confirm these items before fixing the current rating<\/h3>\r\n\r\n  <ul>\r\n    <li>Backup circuit design current;<\/li>\r\n    <li>Single-phase or three-phase configuration;<\/li>\r\n    <li>Continuous load current;<\/li>\r\n    <li>Motor or pump starting behaviour;<\/li>\r\n    <li>Generator output and transient response;<\/li>\r\n    <li>Upstream protective device;<\/li>\r\n    <li>Prospective short-circuit conditions;<\/li>\r\n    <li>Installation temperature and enclosure conditions;<\/li>\r\n    <li>Verified ratings of the exact LEEYEE ATS model.<\/li>\r\n  <\/ul>\r\n\r\n  <div class=\"leeyee-warning\">\r\n    <strong>Do not use a universal oversizing percentage.<\/strong>\r\n    The correct ATS rating must follow the actual circuit, product ratings, protective-device coordination and project design. Do not simply apply a fixed percentage to the hotel\u2019s total connected load.\r\n  <\/div>\r\n\r\n  <h2><span class=\"ez-toc-section\" id=\"motor-and-pump-loads-need-additional-checking\"><\/span>Motor and Pump Loads Need Additional Checking<span class=\"ez-toc-section-end\"><\/span><\/h2>\r\n\r\n  <p>\r\n    Hotel backup circuits may include small pumps, ventilation fans or other motor loads. Motor starting can create a short-duration demand much higher than normal running current, while the generator may experience voltage and frequency changes during the load step.<sup><a href=\"#hotel-ref-5\">[5]<\/a><\/sup>\r\n  <\/p>\r\n\r\n  <p>\r\n    This does not mean the ATS should be selected from motor starting current alone. The engineer must verify that the motor, generator, protective devices and ATS all operate correctly together.\r\n  <\/p>\r\n\r\n  <div class=\"leeyee-engineering-note\">\r\n    <strong>Project confirmation required<\/strong>\r\n    If the backup circuit includes pumps, fans, compressors or other motor loads, provide the motor power, running current, starting method and expected simultaneous starts before confirming the compact ATS model.\r\n  <\/div>\r\n\r\n  <h2><span class=\"ez-toc-section\" id=\"should-the-hotel-use-a-2p-or-4p-ats\"><\/span>Should the Hotel Use a 2P or 4P ATS?<span class=\"ez-toc-section-end\"><\/span><\/h2>\r\n\r\n  <p>\r\n    The real LEEYEE product shown on this page includes <strong>2P and 4P compact configurations<\/strong>. These two versions suit different circuit arrangements.\r\n  <\/p>\r\n\r\n  <div class=\"leeyee-mini-grid\">\r\n    <div class=\"leeyee-mini-card\">\r\n      <strong>2P ATS<\/strong>\r\n      Commonly considered for single-phase applications where line and neutral are transferred according to the approved system design.\r\n    <\/div>\r\n\r\n    <div class=\"leeyee-mini-card\">\r\n      <strong>4P ATS<\/strong>\r\n      Commonly considered for three-phase systems where L1, L2, L3 and neutral are transferred as required by the project design.\r\n    <\/div>\r\n  <\/div>\r\n\r\n  <p>\r\n    The number of poles should not be selected from phase count alone. The engineer must also confirm the grounding arrangement, generator neutral, bonding method, residual-current protection and the applicable electrical design requirements.<sup><a href=\"#hotel-ref-3\">[3]<\/a><\/sup>\r\n  <\/p>\r\n\r\n  <div class=\"leeyee-warning\">\r\n    <strong>Do not say \u201c4P is always safer.\u201d<\/strong>\r\n    Neutral switching is a system-design issue. The correct arrangement must be confirmed for the actual utility, generator and grounding system.\r\n  <\/div>\r\n\r\n  <h2><span class=\"ez-toc-section\" id=\"how-does-this-compact-ats-work-with-a-generator\"><\/span>How Does This Compact ATS Work With a Generator?<span class=\"ez-toc-section-end\"><\/span><\/h2>\r\n\r\n  <p>\r\n    In a standard utility-to-generator backup circuit, the ATS monitors source conditions and transfers the load when the normal source becomes unavailable and the alternate source becomes acceptable according to the controller logic.\r\n  <\/p>\r\n\r\n  <ol class=\"leeyee-sequence\">\r\n    <li><strong>Utility normal:<\/strong> the selected load is supplied from the normal source.<\/li>\r\n    <li><strong>Utility abnormal:<\/strong> the ATS controller detects the source condition.<\/li>\r\n    <li><strong>Generator start request:<\/strong> where the model and generator interface support it, the ATS initiates the generator-start sequence.<\/li>\r\n    <li><strong>Generator available:<\/strong> the alternate source reaches acceptable conditions.<\/li>\r\n    <li><strong>Transfer:<\/strong> the ATS transfers the selected backup circuit to the generator.<\/li>\r\n    <li><strong>Utility restored:<\/strong> the normal source is checked according to the configured logic.<\/li>\r\n    <li><strong>Retransfer:<\/strong> the selected load returns to utility supply.<\/li>\r\n  <\/ol>\r\n\r\n  <p>\r\n    ATS control systems commonly use source monitoring, generator-start logic and timing functions to manage the transfer process.<sup><a href=\"#hotel-ref-4\">[4]<\/a><\/sup><sup><a href=\"#hotel-ref-6\">[6]<\/a><\/sup>\r\n  <\/p>\r\n\r\n  <div class=\"leeyee-buyer-meaning\">\r\n    <strong>Buyer meaning<\/strong>\r\n    Before ordering, confirm the generator-start contact requirement and the control functions available on the exact LEEYEE ATS model.\r\n  <\/div>\r\n\r\n  <h2><span class=\"ez-toc-section\" id=\"why-transfer-delays-matter\"><\/span>Why Transfer Delays Matter<span class=\"ez-toc-section-end\"><\/span><\/h2>\r\n\r\n  <p>\r\n    A brief utility disturbance should not necessarily cause the same sequence as a sustained power failure. ATS controllers can use timing functions for failure confirmation, transfer, retransfer and generator stop logic.<sup><a href=\"#hotel-ref-4\">[4]<\/a><\/sup><sup><a href=\"#hotel-ref-6\">[6]<\/a><\/sup>\r\n  <\/p>\r\n\r\n  <div class=\"leeyee-mini-grid\">\r\n    <div class=\"leeyee-mini-card\">\r\n      <strong>Failure confirmation<\/strong>\r\n      Helps avoid unnecessary switching for very short disturbances when supported by the controller.\r\n    <\/div>\r\n    <div class=\"leeyee-mini-card\">\r\n      <strong>Generator availability<\/strong>\r\n      The alternate source should meet the controller\u2019s acceptable-source conditions before transfer.\r\n    <\/div>\r\n    <div class=\"leeyee-mini-card\">\r\n      <strong>Retransfer delay<\/strong>\r\n      Allows the normal source to remain stable before returning the load.\r\n    <\/div>\r\n    <div class=\"leeyee-mini-card\">\r\n      <strong>Generator stop logic<\/strong>\r\n      Final timing depends on the ATS controller and generator configuration.\r\n    <\/div>\r\n  <\/div>\r\n\r\n  <p>\r\n    Do not copy a universal delay value into every hotel project. Use the settings supported by the exact ATS model and confirm them against the generator and load requirements.\r\n  <\/p>\r\n\r\n  <h2><span class=\"ez-toc-section\" id=\"is-open-transition-ats-suitable-for-this-application\"><\/span>Is Open-Transition ATS Suitable for This Application?<span class=\"ez-toc-section-end\"><\/span><\/h2>\r\n\r\n  <p>\r\n    A compact ATS of this type is best positioned for conventional <strong>open-transition<\/strong> transfer, where one source is disconnected before the other source is connected. This is commonly called break-before-make operation.<sup><a href=\"#hotel-ref-2\">[2]<\/a><\/sup>\r\n  <\/p>\r\n\r\n  <p>\r\n    It should not be presented as a closed-transition or bypass-isolation ATS. Those are different transfer-switch solutions with different hardware, control and system requirements.\r\n  <\/p>\r\n\r\n  <div class=\"leeyee-warning\">\r\n    <strong>An ATS is not a UPS.<\/strong>\r\n    Loads that cannot tolerate generator starting time or the transfer interruption may require a UPS or another engineered continuity solution.\r\n  <\/div>\r\n\r\n  <h2><span class=\"ez-toc-section\" id=\"what-about-remote-alarm-or-bms-monitoring\"><\/span>What About Remote Alarm or BMS Monitoring?<span class=\"ez-toc-section-end\"><\/span><\/h2>\r\n\r\n  <p>\r\n    Hotel engineering teams may want remote indication of source availability, load position, operating mode or fault conditions. Whether this is available depends on the exact controller and ATS model.\r\n  <\/p>\r\n\r\n  <p>\r\n    ATS control systems can use status contacts, programmable I\/O or communication interfaces for remote monitoring, but these features are model-specific and must be checked before specification.<sup><a href=\"#hotel-ref-4\">[4]<\/a><\/sup>\r\n  <\/p>\r\n\r\n  <div class=\"leeyee-engineering-note\">\r\n    <strong>Confirm the exact interface.<\/strong>\r\n    Do not promise Modbus, BACnet, dry contacts or remote operation unless those functions are verified for the exact LEEYEE model being quoted.\r\n  <\/div>\r\n\r\n  <h2><span class=\"ez-toc-section\" id=\"use-the-applicable-transfer-switch-standard\"><\/span>Use the Applicable Transfer-Switch Standard<span class=\"ez-toc-section-end\"><\/span><\/h2>\r\n\r\n  <p>\r\n    For IEC-based projects, <strong>IEC 60947-6-1<\/strong> is the relevant international transfer-switch standard. The 2026 edition covers transfer switching equipment and includes requirements related to automatic transfer switching equipment and ATS controllers.<sup><a href=\"#hotel-ref-1\">[1]<\/a><\/sup>\r\n  <\/p>\r\n\r\n  <div class=\"leeyee-engineering-note\">\r\n    <strong>Certificate scope must be verified.<\/strong>\r\n    Referencing IEC 60947-6-1 does not mean every LEEYEE ATS model or rating automatically carries certification to every edition or project requirement. Request the applicable certificate, report or datasheet for the exact model.\r\n  <\/div>\r\n\r\n  <h2><span class=\"ez-toc-section\" id=\"a-practical-selection-process-for-this-compact-hotel-ats\"><\/span>A Practical Selection Process for This Compact Hotel ATS<span class=\"ez-toc-section-end\"><\/span><\/h2>\r\n\r\n  <ol class=\"leeyee-step-list\">\r\n    <li>\r\n      <strong>Define the selected backup circuit.<\/strong>\r\n      Identify the actual lighting, security, reception, small pump, control or other approved loads that will pass through the ATS.\r\n    <\/li>\r\n\r\n    <li>\r\n      <strong>Calculate the circuit current.<\/strong>\r\n      Use the backup circuit\u2014not the hotel main incomer\u2014as the basis for model selection.\r\n    <\/li>\r\n\r\n    <li>\r\n      <strong>Check motor loads.<\/strong>\r\n      Confirm starting characteristics where pumps, fans or other motors are included.\r\n    <\/li>\r\n\r\n    <li>\r\n      <strong>Confirm single-phase or three-phase operation.<\/strong>\r\n      Match the electrical system to the appropriate ATS configuration.\r\n    <\/li>\r\n\r\n    <li>\r\n      <strong>Confirm 2P or 4P.<\/strong>\r\n      Review whether neutral switching is required by the actual system design.\r\n    <\/li>\r\n\r\n    <li>\r\n      <strong>Confirm the generator interface.<\/strong>\r\n      Check generator-start requirements and source-availability logic.\r\n    <\/li>\r\n\r\n    <li>\r\n      <strong>Confirm delay and operating mode.<\/strong>\r\n      Verify Auto\/Manual operation and available timing functions for the exact product.\r\n    <\/li>\r\n\r\n    <li>\r\n      <strong>Confirm remote status requirements.<\/strong>\r\n      Check whether the project requires alarm contacts or another interface.\r\n    <\/li>\r\n\r\n    <li>\r\n      <strong>Verify the exact product documentation.<\/strong>\r\n      Confirm rated current, poles, dimensions, short-circuit capability, terminals, environment and applicable certificates before order approval.\r\n    <\/li>\r\n  <\/ol>\r\n\r\n  <figure class=\"leeyee-image\">\r\n    <img loading=\"lazy\"\r\n      src=\"https:\/\/www.cnspd.com\/wp-content\/uploads\/2026\/09\/hotel-ats-selection-process.webp\"\r\n      alt=\"Hotel compact ATS selection process from backup loads to 2P or 4P configuration and generator interface\"\r\n      width=\"1448\"\r\n      height=\"1086\"\r\n      loading=\"lazy\"\r\n      decoding=\"async\">\r\n    <figcaption>\r\n      Selection logic for a compact hotel ATS: define the backup circuit first, then confirm current, load characteristics, pole configuration, generator control and monitoring requirements.\r\n    <\/figcaption>\r\n  <\/figure>\r\n\r\n  <h2><span class=\"ez-toc-section\" id=\"common-selection-mistakes\"><\/span>Common Selection Mistakes<span class=\"ez-toc-section-end\"><\/span><\/h2>\r\n\r\n  <div class=\"leeyee-table-wrap\">\r\n    <table>\r\n      <thead>\r\n        <tr>\r\n          <th>Mistake<\/th>\r\n          <th>Why it is a problem<\/th>\r\n          <th>Better approach<\/th>\r\n        <\/tr>\r\n      <\/thead>\r\n      <tbody>\r\n        <tr>\r\n          <td data-label=\"Mistake\">Using the hotel main incomer as the ATS rating<\/td>\r\n          <td data-label=\"Why it is a problem\">The compact ATS may serve only one selected backup circuit.<\/td>\r\n          <td data-label=\"Better approach\">Size from the actual circuit passing through the ATS.<\/td>\r\n        <\/tr>\r\n\r\n        <tr>\r\n          <td data-label=\"Mistake\">Treating a compact ATS as a whole-building transfer switch<\/td>\r\n          <td data-label=\"Why it is a problem\">Large hotels may require much larger engineered switchgear.<\/td>\r\n          <td data-label=\"Better approach\">Keep the product within its verified current and application range.<\/td>\r\n        <\/tr>\r\n\r\n        <tr>\r\n          <td data-label=\"Mistake\">Ignoring motor starting<\/td>\r\n          <td data-label=\"Why it is a problem\">Running current alone may not describe generator performance during starting.<\/td>\r\n          <td data-label=\"Better approach\">Check the motor and generator together.<\/td>\r\n        <\/tr>\r\n\r\n        <tr>\r\n          <td data-label=\"Mistake\">Assuming 4P is always better<\/td>\r\n          <td data-label=\"Why it is a problem\">Neutral switching depends on grounding and system design.<\/td>\r\n          <td data-label=\"Better approach\">Confirm the actual earthing and generator-neutral arrangement.<\/td>\r\n        <\/tr>\r\n\r\n        <tr>\r\n          <td data-label=\"Mistake\">Expecting zero interruption<\/td>\r\n          <td data-label=\"Why it is a problem\">Open-transition transfer and generator starting create an interruption.<\/td>\r\n          <td data-label=\"Better approach\">Use a UPS where uninterrupted power is required.<\/td>\r\n        <\/tr>\r\n\r\n        <tr>\r\n          <td data-label=\"Mistake\">Promising unsupported BMS functions<\/td>\r\n          <td data-label=\"Why it is a problem\">Remote signalling and communication depend on the exact controller.<\/td>\r\n          <td data-label=\"Better approach\">Verify the model-specific I\/O and communication functions first.<\/td>\r\n        <\/tr>\r\n      <\/tbody>\r\n    <\/table>\r\n  <\/div>\r\n\r\n  <h2><span class=\"ez-toc-section\" id=\"what-should-you-send-before-requesting-a-hotel-ats\"><\/span>What Should You Send Before Requesting a Hotel ATS?<span class=\"ez-toc-section-end\"><\/span><\/h2>\r\n\r\n  <div class=\"leeyee-checklist\">\r\n    <h3>Project Checklist<\/h3>\r\n    <ul>\r\n      <li>Backup circuit single-line diagram<\/li>\r\n      <li>Utility voltage<\/li>\r\n      <li>Generator voltage<\/li>\r\n      <li>Single-phase or three-phase<\/li>\r\n      <li>Calculated circuit current<\/li>\r\n      <li>Load list<\/li>\r\n      <li>Motor or pump details<\/li>\r\n      <li>2P or 4P requirement<\/li>\r\n      <li>Grounding \/ earthing arrangement<\/li>\r\n      <li>Generator start-interface requirement<\/li>\r\n      <li>Auto \/ Manual operating requirement<\/li>\r\n      <li>Required alarm or status contacts<\/li>\r\n      <li>Required standard or certificate<\/li>\r\n      <li>Installation space<\/li>\r\n      <li>Quantity<\/li>\r\n      <li>OEM \/ private-label requirements<\/li>\r\n    <\/ul>\r\n  <\/div>\r\n\r\n  <div class=\"leeyee-cta\">\r\n    <h3>Need Help Selecting a Compact ATS for a Hotel Backup Circuit?<\/h3>\r\n    <p>\r\n      Send the backup-circuit diagram, calculated current, generator information and required pole configuration. LEEYEE can help confirm whether the compact 2P or 4P ATS range is suitable for the application.\r\n    <\/p>\r\n\r\n    <button type=\"button\"\r\n            class=\"leeyee-about-btn-light leeyee-site-popup-btn\"\r\n            aria-label=\"Send Your Hotel ATS Requirements\">\r\n      <span class=\"w-btn-label\">Send Your Hotel ATS Requirements<\/span>\r\n    <\/button>\r\n  <\/div>\r\n\r\n  <h2><span class=\"ez-toc-section\" id=\"hotel-automatic-transfer-switch-faq\"><\/span>Hotel Automatic Transfer Switch FAQ<span class=\"ez-toc-section-end\"><\/span><\/h2>\r\n\r\n  <div class=\"leeyee-faq\">\r\n    <div class=\"leeyee-faq-item\">\r\n      <h3>Can this compact ATS be used in a hotel?<\/h3>\r\n      <p>\r\n        Yes, when the selected backup circuit falls within the verified electrical ratings and application conditions of the exact ATS model. It should not automatically be treated as the transfer switch for the entire hotel.\r\n      <\/p>\r\n    <\/div>\r\n\r\n    <div class=\"leeyee-faq-item\">\r\n      <h3>Can one compact ATS supply the whole hotel?<\/h3>\r\n      <p>\r\n        Not necessarily. Larger hotels can have main currents and mechanical loads far above the capability of a compact ATS. This product is more appropriately evaluated for selected backup circuits or smaller distribution sections.\r\n      <\/p>\r\n    <\/div>\r\n\r\n    <div class=\"leeyee-faq-item\">\r\n      <h3>Should I choose 2P or 4P?<\/h3>\r\n      <p>\r\n        2P is commonly considered for single-phase transfer circuits, while 4P can be considered for three-phase systems that require the neutral to be transferred. Final selection depends on the actual grounding and generator-neutral design.<sup><a href=\"#hotel-ref-3\">[3]<\/a><\/sup>\r\n      <\/p>\r\n    <\/div>\r\n\r\n    <div class=\"leeyee-faq-item\">\r\n      <h3>Can the ATS work with a standby generator?<\/h3>\r\n      <p>\r\n        Yes, for a compatible utility-to-generator application. The generator-start interface, source conditions and controller functions must be confirmed for the exact ATS and generator combination.\r\n      <\/p>\r\n    <\/div>\r\n\r\n    <div class=\"leeyee-faq-item\">\r\n      <h3>Can I use it for a hotel pump?<\/h3>\r\n      <p>\r\n        Possibly, but motor starting characteristics must be checked. Provide the pump rating, starting method, running current and generator information before confirming suitability.\r\n      <\/p>\r\n    <\/div>\r\n\r\n    <div class=\"leeyee-faq-item\">\r\n      <h3>Can this compact ATS provide uninterrupted power?<\/h3>\r\n      <p>\r\n        No. A conventional open-transition ATS does not provide zero-interruption transfer. Sensitive loads that cannot tolerate an outage may require a UPS or another continuity solution.<sup><a href=\"#hotel-ref-2\">[2]<\/a><\/sup>\r\n      <\/p>\r\n    <\/div>\r\n\r\n    <div class=\"leeyee-faq-item\">\r\n      <h3>Does it support BMS monitoring?<\/h3>\r\n      <p>\r\n        That depends on the exact controller and model configuration. Do not assume every compact ATS has dry contacts or communication functions. Confirm the required points with LEEYEE before ordering.\r\n      <\/p>\r\n    <\/div>\r\n  <\/div>\r\n\r\n  <div class=\"leeyee-related\">\r\n    <strong>Related technical reading:<\/strong>\r\n    For general ATS operating principles and broader selection logic, see\r\n    <a href=\"https:\/\/www.cnspd.com\/what-is-an-automatic-transfer-switch-how-ats-works-how-to-choose\/\">\r\n      What Is an Automatic Transfer Switch, How ATS Works and How to Choose\r\n    <\/a>.\r\n  <\/div>\r\n\r\n  <div class=\"leeyee-cta\">\r\n    <h3>Confirm the Circuit Before Confirming the ATS Model<\/h3>\r\n    <p>\r\n      If you already have the backup circuit and generator information, send them to LEEYEE together with the required 2P or 4P configuration. This helps avoid selecting a compact ATS for a load or system that needs a larger engineered transfer-switch solution.\r\n    <\/p>\r\n\r\n    <button type=\"button\"\r\n            class=\"leeyee-about-btn-light leeyee-site-popup-btn\"\r\n            aria-label=\"Request ATS Project Review\">\r\n      <span class=\"w-btn-label\">Request ATS Project Review<\/span>\r\n    <\/button>\r\n  <\/div>\r\n\r\n  <section class=\"leeyee-references\">\r\n    <h2><span class=\"ez-toc-section\" id=\"references\"><\/span>References<span class=\"ez-toc-section-end\"><\/span><\/h2>\r\n\r\n    <ol>\r\n      <li id=\"hotel-ref-1\">\r\n        IEC \u2014 <em>IEC 60947-6-1:2026, Low-voltage switchgear and controlgear \u2013 Part 6-1: Multiple function equipment \u2013 Transfer switching equipment<\/em>.\r\n        <a href=\"https:\/\/webstore.iec.ch\/en\/publication\/90494\" target=\"_blank\" rel=\"noopener noreferrer\">IEC official publication page<\/a>.\r\n      <\/li>\r\n\r\n      <li id=\"hotel-ref-2\">\r\n        Schneider Electric \/ ASCO \u2014 Technical guidance on transfer modes, including open-transition break-before-make operation.\r\n        <a href=\"https:\/\/www.se.com\/sg\/en\/faqs\/FAQ000219583\/\" target=\"_blank\" rel=\"noopener noreferrer\">Schneider Electric official technical FAQ<\/a>.\r\n      <\/li>\r\n\r\n      <li id=\"hotel-ref-3\">\r\n        Schneider Electric \/ ASCO \u2014 Technical guidance on solid-neutral and switched-neutral transfer-switch configurations.\r\n        <a href=\"https:\/\/www.se.com\/sg\/en\/faqs\/FAQ000220886\/\" target=\"_blank\" rel=\"noopener noreferrer\">Schneider Electric official technical FAQ<\/a>.\r\n      <\/li>\r\n\r\n      <li id=\"hotel-ref-4\">\r\n        ABB \u2014 <em>TruONE Automatic Transfer Switch Installation and Operating Instructions<\/em>, covering automatic operation, source monitoring, generator-start signalling, status, alarms and control functions.\r\n        <a href=\"https:\/\/library.e.abb.com\/public\/8de907810bf74d5186b827080cf800d6\/1SCC303011M0201.pdf\" target=\"_blank\" rel=\"noopener noreferrer\">ABB official technical manual<\/a>.\r\n      <\/li>\r\n\r\n      <li id=\"hotel-ref-5\">\r\n        Generac Industrial Power \u2014 Technical guidance on commercial and industrial generator sizing, including motor starting and transient generator performance.\r\n        <a href=\"https:\/\/www.generac.com\/globalassets\/pdfs\/industrial\/whitepapers\/sizing-considerations-for-comm-and-ind-gens.pdf\" target=\"_blank\" rel=\"noopener noreferrer\">Generac official technical paper<\/a>.\r\n      <\/li>\r\n\r\n      <li id=\"hotel-ref-6\">\r\n        Eaton \u2014 <em>ATC-300+ Automatic Transfer Switch Controller Operation and Maintenance Manual<\/em>, covering generator starting, transfer timing, retransfer timing and generator cool-off functions.\r\n        <a href=\"https:\/\/www.eaton.com\/content\/dam\/eaton\/products\/safety-security-emergency-communications\/fire-pump-controllers\/documents\/im05805022k-atc-300-plus-op-manual-en.pdf\" target=\"_blank\" rel=\"noopener noreferrer\">Eaton official manual<\/a>.\r\n      <\/li>\r\n    <\/ol>\r\n  <\/section>\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>Hotel ATS Engineering Selection GuideSelecting an automatic transfer switch for a hotel starts with the backup-power circuit, not with the total electrical capacity of the building. For compact ATS applications, the project team should first identify the selected loads that need generator backup and then confirm current, pole configuration, generator interface and control requirements for&#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-31513","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>Hotel Automatic Transfer Switch Selection Guide | LEEYEE<\/title>\n<meta name=\"description\" content=\"Learn how to select a compact automatic transfer switch for hotel backup circuits, including load current, 2P vs 4P, generator control, motor loads, transfer delay and remote status 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\/it\/hotel-automatic-transfer-switch\/\" \/>\n<meta property=\"og:locale\" content=\"it_IT\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Hotel Automatic Transfer Switch Selection Guide | LEEYEE\" \/>\n<meta property=\"og:description\" content=\"Learn how to select a compact automatic transfer switch for hotel backup circuits, including load current, 2P vs 4P, generator control, motor loads, transfer delay and remote status requirements.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.cnspd.com\/it\/hotel-automatic-transfer-switch\/\" \/>\n<meta property=\"og:site_name\" content=\"Surge Protector, Surge Arrestor, Isolating Switch - 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