{"id":31384,"date":"2026-09-29T09:35:32","date_gmt":"2026-09-29T01:35:32","guid":{"rendered":"https:\/\/www.cnspd.com\/?p=31384"},"modified":"2026-09-29T10:01:14","modified_gmt":"2026-09-29T02:01:14","slug":"automatic-transfer-switch-for-industrial-plants-and-factory-control-panels","status":"publish","type":"post","link":"https:\/\/www.cnspd.com\/th\/industrial-plant-automatic-transfer-switch\/","title":{"rendered":"Automatic Transfer Switch for Industrial Plants and Factory Control Panels"},"content":{"rendered":"\t\t<div data-elementor-type=\"wp-post\" data-elementor-id=\"31384\" class=\"elementor elementor-31384\" data-elementor-post-type=\"post\">\n\t\t\t\t<div class=\"elementor-element elementor-element-248fab8 e-flex e-con-boxed e-con e-parent\" data-id=\"248fab8\" 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-e8ee61c elementor-widget elementor-widget-html\" 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entire factory power system. For a compact ATS, the more realistic industrial application is usually a selected low-voltage load group: a control panel, a small distribution board, a generator-backed auxiliary circuit or another group of loads that can tolerate a short interruption during transfer.\r\n  <\/p>\r\n\r\n  <div class=\"ly-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\/th\/industrial-plant-automatic-transfer-switch\/#quick-answer-where-does-a-compact-ats-fit-in-a-factory\" >Quick Answer: Where Does a Compact ATS Fit in a Factory?<\/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\/industrial-plant-automatic-transfer-switch\/#which-factory-loads-are-more-suitable-for-a-compact-ats\" >Which Factory Loads Are More Suitable for a Compact 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\/th\/industrial-plant-automatic-transfer-switch\/#typical-utility-to-generator-arrangement\" >Typical Utility-to-Generator Arrangement<\/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\/industrial-plant-automatic-transfer-switch\/#do-not-treat-a-compact-ats-as-the-entire-factory-power-system\" >Do Not Treat a Compact ATS as the Entire Factory Power System<\/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\/industrial-plant-automatic-transfer-switch\/#how-should-the-ats-current-rating-be-selected\" >How Should the ATS Current Rating Be Selected?<\/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\/industrial-plant-automatic-transfer-switch\/#why-do-motor-loads-need-extra-attention\" >Why Do Motor Loads Need Extra Attention?<\/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\/industrial-plant-automatic-transfer-switch\/#should-a-factory-ats-be-3p-or-4p\" >Should a Factory ATS Be 3P or 4P?<\/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\/industrial-plant-automatic-transfer-switch\/#how-should-the-ats-work-with-mccbs\" >How Should the ATS Work With MCCBs?<\/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\/industrial-plant-automatic-transfer-switch\/#what-happens-during-a-utility-failure\" >What Happens During a Utility Failure?<\/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\/industrial-plant-automatic-transfer-switch\/#which-ats-indications-are-useful-in-a-factory-panel\" >Which ATS Indications Are Useful in a Factory Panel?<\/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\/industrial-plant-automatic-transfer-switch\/#when-is-this-compact-ats-a-good-match\" >When Is This Compact ATS a Good Match?<\/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\/industrial-plant-automatic-transfer-switch\/#what-information-should-you-send-before-ordering\" >What Information Should You Send Before Ordering?<\/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\/th\/industrial-plant-automatic-transfer-switch\/#faq\" >FAQ<\/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\/th\/industrial-plant-automatic-transfer-switch\/#references\" >References<\/a><\/li><\/ul><\/nav><\/div>\n<h2><span class=\"ez-toc-section\" id=\"quick-answer-where-does-a-compact-ats-fit-in-a-factory\"><\/span>Quick Answer: Where Does a Compact ATS Fit in a Factory?<span class=\"ez-toc-section-end\"><\/span><\/h2>\r\n    <p>\r\n      A compact open-transition ATS is best evaluated around the <strong>specific loads connected to the transfer circuit<\/strong>, not the total connected load of the plant. Confirm the simultaneous load current, important motor starting conditions, generator capability, system voltage, required poles and upstream protection before selecting the ATS. IEC 60947-6-1 provides the IEC product-standard framework for transfer switching equipment.<sup>[1]<\/sup>\r\n    <\/p>\r\n\r\n    <div class=\"ly-answer-flow\" aria-label=\"Industrial compact ATS selection flow\">\r\n      <span>Select Backup Loads<\/span>\r\n      <span class=\"ly-arrow\">\u2192<\/span>\r\n      <span>Check Load Current<\/span>\r\n      <span class=\"ly-arrow\">\u2192<\/span>\r\n      <span>Check Motors<\/span>\r\n      <span class=\"ly-arrow\">\u2192<\/span>\r\n      <span>Confirm Generator<\/span>\r\n      <span class=\"ly-arrow\">\u2192<\/span>\r\n      <span>Select 2P \/ 3P \/ 4P<\/span>\r\n    <\/div>\r\n  <\/div>\r\n\r\n  <div class=\"ly-engineering-note\">\r\n    <span class=\"ly-note-title\">Product scope<\/span>\r\n    LEEYEE's standard ATS is a compact integrated <strong>open-transition<\/strong> product for low-voltage dual-source switching. This guide therefore focuses on selected factory loads, control panels and sub-distribution circuits. It does not present the compact product as a large draw-out ATS, bypass-isolation system, closed-transition system or complete plant-wide main switchboard.\r\n  <\/div>\r\n\r\n  <figure class=\"ly-product-figure\">\r\n    <img\r\n      src=\"https:\/\/www.cnspd.com\/wp-content\/uploads\/2026\/06\/2.png\"\r\n      alt=\"LEEYEE compact automatic transfer switches in 2-pole and 4-pole configurations\"\r\n      loading=\"eager\"\r\n      decoding=\"async\">\r\n    <figcaption>\r\n      LEEYEE compact integrated ATS products shown in 2-pole and 4-pole configurations. The final model must be matched to the project voltage, current, neutral arrangement, source configuration and required control functions.\r\n    <\/figcaption>\r\n  <\/figure>\r\n\r\n  <h2><span class=\"ez-toc-section\" id=\"which-factory-loads-are-more-suitable-for-a-compact-ats\"><\/span>Which Factory Loads Are More Suitable for a Compact ATS?<span class=\"ez-toc-section-end\"><\/span><\/h2>\r\n\r\n  <p>\r\n    The key question is not \u201cHow large is the factory?\u201d It is \u201cWhich loads will actually pass through this ATS?\u201d\r\n  <\/p>\r\n\r\n  <p>\r\n    A compact ATS is more naturally applied to a defined low-voltage load group rather than to the full incoming supply of a large industrial facility.\r\n  <\/p>\r\n\r\n  <p class=\"ly-table-note\">\r\n    The examples below are practical application categories, not automatic approvals. Actual suitability must still be checked against the selected ATS data and project conditions.\r\n  <\/p>\r\n\r\n  <div class=\"ly-table-wrap\">\r\n    <table>\r\n      <thead>\r\n        <tr>\r\n          <th>Load or Circuit<\/th>\r\n          <th>Typical Fit<\/th>\r\n          <th>What to Confirm<\/th>\r\n        <\/tr>\r\n      <\/thead>\r\n      <tbody>\r\n        <tr>\r\n          <td>PLC and control circuits<\/td>\r\n          <td>Often suitable<\/td>\r\n          <td>Allowed interruption and control-power requirements<\/td>\r\n        <\/tr>\r\n        <tr>\r\n          <td>Small control panels<\/td>\r\n          <td>Often suitable<\/td>\r\n          <td>Total current and control logic<\/td>\r\n        <\/tr>\r\n        <tr>\r\n          <td>Small distribution boards<\/td>\r\n          <td>Often suitable<\/td>\r\n          <td>Maximum simultaneous load and protection<\/td>\r\n        <\/tr>\r\n        <tr>\r\n          <td>Lighting and monitoring circuits<\/td>\r\n          <td>Often suitable<\/td>\r\n          <td>Load current and required backup duration<\/td>\r\n        <\/tr>\r\n        <tr>\r\n          <td>Small pumps and fans<\/td>\r\n          <td>Needs checking<\/td>\r\n          <td>Motor starting current and switching duty<\/td>\r\n        <\/tr>\r\n        <tr>\r\n          <td>Large compressors or heavy motors<\/td>\r\n          <td>Requires detailed engineering review<\/td>\r\n          <td>Starting method, utilisation duty, generator response and ATS capability<\/td>\r\n        <\/tr>\r\n        <tr>\r\n          <td>Plant-wide main incoming supply<\/td>\r\n          <td>Not automatically within compact ATS scope<\/td>\r\n          <td>Complete switchboard architecture and project requirements<\/td>\r\n        <\/tr>\r\n      <\/tbody>\r\n    <\/table>\r\n  <\/div>\r\n\r\n  <p class=\"ly-table-conclusion\">\r\n    Procurement conclusion: select the ATS around the actual transferred load group. Do not use total transformer capacity or total factory connected load as the only sizing basis.\r\n  <\/p>\r\n\r\n  <div class=\"ly-buyer-meaning\">\r\n    <span class=\"ly-note-title\">Buyer meaning<\/span>\r\n    When requesting a quotation, tell the supplier which circuits must remain available during a utility outage. A clear emergency-load list is more useful than simply saying \u201cfactory load\u201d or sending only the transformer rating.\r\n  <\/div>\r\n\r\n  <h2><span class=\"ez-toc-section\" id=\"typical-utility-to-generator-arrangement\"><\/span>Typical Utility-to-Generator Arrangement<span class=\"ez-toc-section-end\"><\/span><\/h2>\r\n\r\n  <p>\r\n    A common industrial backup arrangement uses the utility as the normal source and a generator as the standby source. Both sources are connected to the transfer system, while the ATS supplies the selected backup-load circuit.\r\n  <\/p>\r\n\r\n  <figure>\r\n    <img\r\n      src=\"https:\/\/www.cnspd.com\/wp-content\/uploads\/2026\/09\/industrial-plant-ats-power-transfer-diagram.webp\"\r\n      alt=\"Industrial plant automatic transfer switch diagram showing utility, generator, protective devices, ATS and selected critical loads\"\r\n      loading=\"lazy\"\r\n      decoding=\"async\">\r\n    <figcaption>\r\n      Typical utility-to-generator arrangement for selected industrial loads. The ATS transfers the defined backup circuit between sources; upstream protection and the exact distribution architecture must be confirmed for the project.\r\n    <\/figcaption>\r\n  <\/figure>\r\n\r\n  <p>\r\n    When the normal source becomes unacceptable and the generator reaches the required operating condition, the ATS can transfer the connected load to the emergency source. After normal power is restored and the programmed conditions are satisfied, the load can transfer back.<sup>[2]<\/sup>\r\n  <\/p>\r\n\r\n  <div class=\"ly-warning\">\r\n    <span class=\"ly-note-title\">Open-transition means a short interruption<\/span>\r\n    LEEYEE's standard compact ATS is intended for open-transition switching. This is a break-before-make process: the first source is disconnected before the second source is connected. The load therefore experiences an interruption during transfer.<sup>[2]<\/sup> If the process cannot tolerate that interruption, the overall power-continuity design needs a different engineering solution.\r\n  <\/div>\r\n\r\n  <h2><span class=\"ez-toc-section\" id=\"do-not-treat-a-compact-ats-as-the-entire-factory-power-system\"><\/span>Do Not Treat a Compact ATS as the Entire Factory Power System<span class=\"ez-toc-section-end\"><\/span><\/h2>\r\n\r\n  <p>\r\n    An ATS performs one main job: it transfers a load between available power sources. It does not automatically replace the other protection, distribution and continuity functions required in an industrial electrical system.\r\n  <\/p>\r\n\r\n  <p>\r\n    Upstream circuit-breakers, conductors, generator controls and the transfer switch must therefore be considered together. IEC 60947-2 covers low-voltage circuit-breakers, while IEC 60947-6-1 covers transfer switching equipment.<sup>[1][3]<\/sup>\r\n  <\/p>\r\n\r\n  <div class=\"ly-engineering-note\">\r\n    <span class=\"ly-note-title\">Engineering meaning<\/span>\r\n    Do not assume that installing an ATS eliminates the need for an MCCB or another required protective device. The available fault current, breaker characteristics, conductor design and ATS short-circuit data must be reviewed for the actual installation.\r\n  <\/div>\r\n\r\n  <h2><span class=\"ez-toc-section\" id=\"how-should-the-ats-current-rating-be-selected\"><\/span>How Should the ATS Current Rating Be Selected?<span class=\"ez-toc-section-end\"><\/span><\/h2>\r\n\r\n  <p>\r\n    Start with the maximum current expected to pass through the ATS during normal transferred operation. Then check whether the load characteristics create additional requirements.\r\n  <\/p>\r\n\r\n  <p>For a compact industrial ATS application, confirm:<\/p>\r\n\r\n  <ul>\r\n    <li><strong>System voltage and frequency<\/strong> of both sources.<\/li>\r\n    <li><strong>Maximum simultaneous load current<\/strong> of the transferred circuit.<\/li>\r\n    <li><strong>Load type<\/strong>, especially motors and inductive loads.<\/li>\r\n    <li><strong>ATS utilisation data<\/strong> for the intended switching duty.<\/li>\r\n    <li><strong>Number of poles<\/strong> and whether the neutral must be switched.<\/li>\r\n    <li><strong>Available fault current<\/strong> at the installation point.<\/li>\r\n    <li><strong>Upstream protective device<\/strong> and required coordination.<\/li>\r\n    <li><strong>Installation conditions<\/strong>, including enclosure and ambient conditions where relevant.<\/li>\r\n  <\/ul>\r\n\r\n  <div class=\"ly-warning\">\r\n    <span class=\"ly-note-title\">Avoid simple oversizing formulas<\/span>\r\n    Do not assume that every industrial ATS can be selected by multiplying the running current by a fixed factor such as 1.5 or 2. Motor starting, switching duty, generator performance, protective-device coordination and installation conditions may all change the final selection.\r\n  <\/div>\r\n\r\n  <h2><span class=\"ez-toc-section\" id=\"why-do-motor-loads-need-extra-attention\"><\/span>Why Do Motor Loads Need Extra Attention?<span class=\"ez-toc-section-end\"><\/span><\/h2>\r\n\r\n  <p>\r\n    Motors can draw much more current during starting than during normal running. This means that a small pump, fan or machine auxiliary motor cannot be evaluated only from its steady-state current.\r\n  <\/p>\r\n\r\n  <p>\r\n    Generator application guidance also shows that motor starting can produce substantial transient demand and voltage dip. Generator response depends on factors such as starting kVA, starting method, alternator characteristics and engine response.<sup>[4][5]<\/sup>\r\n  <\/p>\r\n\r\n  <ol class=\"ly-steps\">\r\n    <li>\r\n      <strong>Identify the motors on the backup circuit.<\/strong>\r\n      Do not mix the complete factory motor list with the motors actually supplied through this ATS.\r\n    <\/li>\r\n    <li>\r\n      <strong>Record the motor rating and starting method.<\/strong>\r\n      Direct-on-line, soft-start and variable-frequency-drive applications can create different system behaviour.\r\n    <\/li>\r\n    <li>\r\n      <strong>Check whether several motors can start together.<\/strong>\r\n      Simultaneous starting can create a larger transient demand.\r\n    <\/li>\r\n    <li>\r\n      <strong>Confirm generator capability.<\/strong>\r\n      Check acceptable voltage and frequency performance during the expected starting event.\r\n    <\/li>\r\n    <li>\r\n      <strong>Confirm the ATS switching duty.<\/strong>\r\n      The ATS must be suitable for the actual load type and application.\r\n    <\/li>\r\n  <\/ol>\r\n\r\n  <div class=\"ly-buyer-meaning\">\r\n    <span class=\"ly-note-title\">Buyer meaning<\/span>\r\n    For a small pump or fan circuit, send the motor power, rated current and starting method together with the ATS enquiry. For a large compressor, heavy conveyor or major production motor, do not assume suitability merely because its running current is below the ATS nominal current.\r\n  <\/div>\r\n\r\n  <h2><span class=\"ez-toc-section\" id=\"should-a-factory-ats-be-3p-or-4p\"><\/span>Should a Factory ATS Be 3P or 4P?<span class=\"ez-toc-section-end\"><\/span><\/h2>\r\n\r\n  <p>\r\n    Pole selection depends on the electrical system and neutral arrangement, not simply on whether the system is three-phase.\r\n  <\/p>\r\n\r\n  <p>\r\n    A 3P ATS switches the three phase conductors while leaving the neutral unswitched. A 4P ATS switches the neutral together with the phase conductors. Whether the neutral should be switched depends on the generator connection, earthing and bonding arrangement, protection design and applicable project requirements.<sup>[2]<\/sup>\r\n  <\/p>\r\n\r\n  <div class=\"ly-engineering-note\">\r\n    <span class=\"ly-note-title\">Information required for pole selection<\/span>\r\n    Send the system voltage, single-line diagram, generator neutral arrangement, earthing system and intended neutral connection. If those details are not known, do not choose 3P or 4P from voltage alone.\r\n  <\/div>\r\n\r\n  <h2><span class=\"ez-toc-section\" id=\"how-should-the-ats-work-with-mccbs\"><\/span>How Should the ATS Work With MCCBs?<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>Device<\/th>\r\n          <th>Main Job<\/th>\r\n          <th>What the Buyer Must Check<\/th>\r\n        <\/tr>\r\n      <\/thead>\r\n      <tbody>\r\n        <tr>\r\n          <td>ATS \/ ATSE<\/td>\r\n          <td>Transfers the selected load between sources<\/td>\r\n          <td>Current, poles, transfer logic and switching data<\/td>\r\n        <\/tr>\r\n        <tr>\r\n          <td>MCCB \/ circuit-breaker<\/td>\r\n          <td>Provides the specified circuit switching and protection functions<\/td>\r\n          <td>Breaking capacity, trip settings and coordination<\/td>\r\n        <\/tr>\r\n        <tr>\r\n          <td>Generator controller<\/td>\r\n          <td>Starts and monitors the generator set<\/td>\r\n          <td>Start request, voltage\/frequency readiness and operating sequence<\/td>\r\n        <\/tr>\r\n      <\/tbody>\r\n    <\/table>\r\n  <\/div>\r\n\r\n  <p class=\"ly-table-conclusion\">\r\n    Procurement conclusion: matching the ampere number printed on an ATS and an MCCB does not prove that the combination is correctly coordinated.\r\n  <\/p>\r\n\r\n  <h2><span class=\"ez-toc-section\" id=\"what-happens-during-a-utility-failure\"><\/span>What Happens During a Utility Failure?<span class=\"ez-toc-section-end\"><\/span><\/h2>\r\n\r\n  <p>\r\n    The exact thresholds and delay settings depend on the controller and project, but a typical utility-to-generator sequence follows this logic:\r\n  <\/p>\r\n\r\n  <ol class=\"ly-steps\">\r\n    <li>\r\n      <strong>The normal source becomes unacceptable.<\/strong>\r\n      The controller monitors the source according to its available sensing functions.\r\n    <\/li>\r\n    <li>\r\n      <strong>The generator receives a start request.<\/strong>\r\n      The generator starts and reaches acceptable operating conditions.\r\n    <\/li>\r\n    <li>\r\n      <strong>The ATS transfers the selected load.<\/strong>\r\n      In open transition, the normal source is disconnected before the emergency source is connected.\r\n    <\/li>\r\n    <li>\r\n      <strong>The generator supplies the backup circuit.<\/strong>\r\n      The generator must support the actual running and transient load.\r\n    <\/li>\r\n    <li>\r\n      <strong>The load retransfers when normal power returns.<\/strong>\r\n      Retransfer and generator cooldown timing depend on the controller and generator-system settings.\r\n    <\/li>\r\n  <\/ol>\r\n\r\n  <h2><span class=\"ez-toc-section\" id=\"which-ats-indications-are-useful-in-a-factory-panel\"><\/span>Which ATS Indications Are Useful in a Factory Panel?<span class=\"ez-toc-section-end\"><\/span><\/h2>\r\n\r\n  <p>\r\n    Maintenance personnel should be able to understand source availability and load position without guessing the current switch state.\r\n  <\/p>\r\n\r\n  <p>For LEEYEE compact ATS project confirmation, useful functions can include:<\/p>\r\n\r\n  <ul>\r\n    <li><strong>Normal Available<\/strong><\/li>\r\n    <li><strong>Emergency Available<\/strong><\/li>\r\n    <li><strong>Load to Normal<\/strong><\/li>\r\n    <li><strong>Load to Emergency<\/strong><\/li>\r\n    <li><strong>Auto \/ Manual<\/strong><\/li>\r\n    <li><strong>Fault Alarm<\/strong>, where provided by the selected configuration<\/li>\r\n  <\/ul>\r\n\r\n  <p>\r\n    If remote indication, generator-start contacts, dry-contact status, BMS integration or communication is required, specify the exact signal list before ordering. Do not assume that every controller version provides the same terminals or communication functions.\r\n  <\/p>\r\n\r\n  <h2><span class=\"ez-toc-section\" id=\"when-is-this-compact-ats-a-good-match\"><\/span>When Is This Compact ATS a Good Match?<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>Application<\/th>\r\n          <th>Suitability<\/th>\r\n          <th>Engineering Meaning<\/th>\r\n        <\/tr>\r\n      <\/thead>\r\n      <tbody>\r\n        <tr>\r\n          <td>Utility + standby generator<\/td>\r\n          <td>Typical application<\/td>\r\n          <td>Confirm current, voltage, poles and control logic<\/td>\r\n        <\/tr>\r\n        <tr>\r\n          <td>Factory control panel<\/td>\r\n          <td>Potentially suitable<\/td>\r\n          <td>Confirm transferred load and allowable interruption<\/td>\r\n        <\/tr>\r\n        <tr>\r\n          <td>Small backup distribution board<\/td>\r\n          <td>Potentially suitable<\/td>\r\n          <td>Check maximum simultaneous load and protection<\/td>\r\n        <\/tr>\r\n        <tr>\r\n          <td>Small pump or fan backup circuit<\/td>\r\n          <td>Needs motor check<\/td>\r\n          <td>Confirm motor starting and ATS switching duty<\/td>\r\n        <\/tr>\r\n        <tr>\r\n          <td>Large factory main incoming system<\/td>\r\n          <td>Not automatically suitable<\/td>\r\n          <td>Requires complete switchboard and protection review<\/td>\r\n        <\/tr>\r\n        <tr>\r\n          <td>No-break process<\/td>\r\n          <td>Not suitable by itself<\/td>\r\n          <td>Open transition causes an interruption<\/td>\r\n        <\/tr>\r\n        <tr>\r\n          <td>Bypass-isolation requirement<\/td>\r\n          <td>Not the standard compact product<\/td>\r\n          <td>Requires a separate engineered architecture<\/td>\r\n        <\/tr>\r\n      <\/tbody>\r\n    <\/table>\r\n  <\/div>\r\n\r\n  <p class=\"ly-table-conclusion\">\r\n    The product should be selected where a compact open-transition ATS matches the actual electrical and process requirement, rather than forcing the product into a higher-level industrial application for which it was not intended.\r\n  <\/p>\r\n\r\n  <h2><span class=\"ez-toc-section\" id=\"what-information-should-you-send-before-ordering\"><\/span>What Information Should You Send Before Ordering?<span class=\"ez-toc-section-end\"><\/span><\/h2>\r\n\r\n  <p>\r\n    A useful industrial ATS enquiry should describe the transferred circuit, not just provide one ampere value.\r\n  <\/p>\r\n\r\n  <div class=\"ly-checklist\">\r\n    <div class=\"ly-checkitem\"><strong>Normal source:<\/strong> voltage and frequency<\/div>\r\n    <div class=\"ly-checkitem\"><strong>Emergency source:<\/strong> generator voltage and frequency<\/div>\r\n    <div class=\"ly-checkitem\"><strong>Phase system:<\/strong> single-phase or three-phase<\/div>\r\n    <div class=\"ly-checkitem\"><strong>Pole requirement:<\/strong> 2P, 3P or 4P<\/div>\r\n    <div class=\"ly-checkitem\"><strong>Transferred load:<\/strong> maximum simultaneous current<\/div>\r\n    <div class=\"ly-checkitem\"><strong>Motor loads:<\/strong> rating and starting method<\/div>\r\n    <div class=\"ly-checkitem\"><strong>Neutral arrangement:<\/strong> earthing and bonding details<\/div>\r\n    <div class=\"ly-checkitem\"><strong>Protection:<\/strong> upstream MCCB or breaker information<\/div>\r\n    <div class=\"ly-checkitem\"><strong>Fault level:<\/strong> available short-circuit information where required<\/div>\r\n    <div class=\"ly-checkitem\"><strong>Control functions:<\/strong> start signal, status and alarm requirements<\/div>\r\n    <div class=\"ly-checkitem\"><strong>Panel requirement:<\/strong> installation space and arrangement<\/div>\r\n    <div class=\"ly-checkitem\"><strong>Project document:<\/strong> single-line diagram where available<\/div>\r\n  <\/div>\r\n\r\n  <div class=\"ly-cta\">\r\n    <h3>Need help confirming a compact ATS for a factory panel?<\/h3>\r\n    <p>\r\n      Send the system voltage, backup-load current, motor information, pole requirement, generator details and single-line diagram. LEEYEE can help confirm whether the compact open-transition ATS configuration matches the intended 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=\"Request ATS Selection Help\">\r\n      <span class=\"w-btn-label\">Request ATS Selection Help<\/span>\r\n    <\/button>\r\n  <\/div>\r\n\r\n  <h2><span class=\"ez-toc-section\" id=\"faq\"><\/span>FAQ<span class=\"ez-toc-section-end\"><\/span><\/h2>\r\n\r\n  <div class=\"ly-faq\">\r\n\r\n    <details>\r\n      <summary>Can this ATS supply an entire factory?<\/summary>\r\n      <div>\r\n        Do not assume so. A compact ATS is better evaluated around the specific load group connected to it. Large plant-wide incoming systems may require a different switchgear architecture, higher ratings and additional engineering functions.\r\n      <\/div>\r\n    <\/details>\r\n\r\n    <details>\r\n      <summary>Can a compact ATS be used for factory control panels?<\/summary>\r\n      <div>\r\n        Yes, when the voltage, load current, pole configuration, switching duty, protection and allowable transfer interruption match the ATS application data.\r\n      <\/div>\r\n    <\/details>\r\n\r\n    <details>\r\n      <summary>Can it be used with a standby generator?<\/summary>\r\n      <div>\r\n        Utility-to-generator transfer is a typical application for this type of compact ATS. The generator voltage, frequency, start logic, capacity and neutral arrangement still need to be confirmed.\r\n      <\/div>\r\n    <\/details>\r\n\r\n    <details>\r\n      <summary>Can I select the ATS only from the motor running current?<\/summary>\r\n      <div>\r\n        No. Motor starting conditions can place substantially greater transient demand on the generator and switching system than the normal running current indicates.\r\n      <\/div>\r\n    <\/details>\r\n\r\n    <details>\r\n      <summary>Does every three-phase factory need a 4P ATS?<\/summary>\r\n      <div>\r\n        No. Whether the neutral needs to be switched depends on the source configuration, generator neutral, earthing and bonding arrangement, protection design and applicable project requirements.\r\n      <\/div>\r\n    <\/details>\r\n\r\n    <details>\r\n      <summary>Does the ATS replace an MCCB?<\/summary>\r\n      <div>\r\n        Do not assume that it does. The ATS performs source transfer, while circuit-breakers provide the protection and switching functions required by the distribution design. They should be selected and coordinated together.\r\n      <\/div>\r\n    <\/details>\r\n\r\n    <details>\r\n      <summary>Is this ATS suitable for uninterrupted industrial processes?<\/summary>\r\n      <div>\r\n        Not by itself. The standard compact product uses open-transition switching, which introduces an interruption between sources. Processes requiring uninterrupted power need a different continuity architecture.\r\n      <\/div>\r\n    <\/details>\r\n\r\n  <\/div>\r\n\r\n  <div 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>\r\n        IEC, <em>IEC 60947-6-1:2026 \u2014 Low-voltage switchgear and controlgear \u2014 Part 6-1: Multiple function equipment \u2014 Transfer switching equipment<\/em>.\r\n        <a href=\"https:\/\/webstore.iec.ch\/\" target=\"_blank\" rel=\"noopener noreferrer\">IEC Webstore<\/a>.\r\n      <\/li>\r\n      <li>\r\n        Eaton, published technical literature covering automatic transfer switches, open-transition operation and switched-neutral applications.\r\n        <a href=\"https:\/\/www.eaton.com\/\" target=\"_blank\" rel=\"noopener noreferrer\">Eaton<\/a>.\r\n      <\/li>\r\n      <li>\r\n        IEC, <em>IEC 60947-2 \u2014 Low-voltage switchgear and controlgear \u2014 Part 2: Circuit-breakers<\/em>.\r\n        <a href=\"https:\/\/webstore.iec.ch\/\" target=\"_blank\" rel=\"noopener noreferrer\">IEC Webstore<\/a>.\r\n      <\/li>\r\n      <li>\r\n        Cummins Power Generation, generator-set application guidance covering motor starting and transient load behaviour.\r\n        <a href=\"https:\/\/www.cummins.com\/generators\" target=\"_blank\" rel=\"noopener noreferrer\">Cummins Power Generation<\/a>.\r\n      <\/li>\r\n      <li>\r\n        Cummins Power Generation, generator sizing and motor-starting technical guidance. Final generator selection should be confirmed using the applicable generator data and project conditions.\r\n        <a href=\"https:\/\/www.cummins.com\/generators\" target=\"_blank\" rel=\"noopener noreferrer\">Cummins Power Generation<\/a>.\r\n      <\/li>\r\n    <\/ol>\r\n  <\/div>\r\n\r\n  <script>\r\n  document.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>\r\n\r\n<\/div>\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>An automatic transfer switch can be useful in a factory without being responsible for the entire factory power system. For a compact ATS, the more realistic industrial application is usually a selected low-voltage load group: a control panel, a small distribution board, a generator-backed auxiliary circuit or another group of loads that can tolerate a&#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-31384","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>Industrial Automatic Transfer Switch Guide | LEEYEE<\/title>\n<meta name=\"description\" content=\"Learn how to select a compact automatic transfer switch for factory control panels, backup distribution circuits and selected industrial loads, including motor loads, generator capacity, 3P vs 4P selection and MCCB coordination.\" \/>\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\/industrial-plant-automatic-transfer-switch\/\" \/>\n<meta property=\"og:locale\" content=\"th_TH\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Industrial Automatic Transfer Switch Guide | LEEYEE\" \/>\n<meta property=\"og:description\" content=\"Learn how to select a compact automatic transfer switch for factory control panels, backup distribution circuits and selected industrial loads, including motor loads, generator capacity, 3P vs 4P selection and MCCB coordination.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.cnspd.com\/th\/industrial-plant-automatic-transfer-switch\/\" \/>\n<meta property=\"og:site_name\" content=\"Surge Protector, Surge Arrestor, Isolating Switch - 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