{"id":21395,"date":"2022-08-22T15:08:36","date_gmt":"2022-08-22T22:08:36","guid":{"rendered":"https:\/\/www.globalpwr.com\/?p=21395"},"modified":"2026-03-05T09:53:19","modified_gmt":"2026-03-05T17:53:19","slug":"automatic-transfer-switch-transition-types","status":"publish","type":"post","link":"https:\/\/www.globalpwr.com\/blog\/automatic-transfer-switch-transition-types\/","title":{"rendered":"ATS Transition Types Explained: Open, Closed, and Delayed Transfer Switches"},"content":{"rendered":"\t<div class=\"img has-hover x md-x lg-x y md-y lg-y\" id=\"image_587198450\">\n\t\t<a class=\"\" href=\"https:\/\/www.globalpwr.com\/automatic-transfer-switches\/\" >\t\t\t\t\t\t<div class=\"img-inner box-shadow-1 dark\" >\n\t\t\t<img decoding=\"async\" width=\"1020\" height=\"765\" src=\"https:\/\/www.globalpwr.com\/wp-content\/uploads\/2022\/08\/ZenithABB-ZTG-T-series-ATS-1600-3000A-1200x900.jpg\" class=\"attachment-large size-large\" alt=\"Automatic Transfer Switch for Generator\" srcset=\"https:\/\/www.globalpwr.com\/wp-content\/uploads\/2022\/08\/ZenithABB-ZTG-T-series-ATS-1600-3000A-1200x900.jpg 1200w, https:\/\/www.globalpwr.com\/wp-content\/uploads\/2022\/08\/ZenithABB-ZTG-T-series-ATS-1600-3000A-600x450.jpg 600w, https:\/\/www.globalpwr.com\/wp-content\/uploads\/2022\/08\/ZenithABB-ZTG-T-series-ATS-1600-3000A-800x600.jpg 800w, https:\/\/www.globalpwr.com\/wp-content\/uploads\/2022\/08\/ZenithABB-ZTG-T-series-ATS-1600-3000A-768x576.jpg 768w, https:\/\/www.globalpwr.com\/wp-content\/uploads\/2022\/08\/ZenithABB-ZTG-T-series-ATS-1600-3000A-1536x1152.jpg 1536w, https:\/\/www.globalpwr.com\/wp-content\/uploads\/2022\/08\/ZenithABB-ZTG-T-series-ATS-1600-3000A-300x225.jpg 300w, https:\/\/www.globalpwr.com\/wp-content\/uploads\/2022\/08\/ZenithABB-ZTG-T-series-ATS-1600-3000A-1030x773.jpg 1030w, https:\/\/www.globalpwr.com\/wp-content\/uploads\/2022\/08\/ZenithABB-ZTG-T-series-ATS-1600-3000A-510x383.jpg 510w, https:\/\/www.globalpwr.com\/wp-content\/uploads\/2022\/08\/ZenithABB-ZTG-T-series-ATS-1600-3000A.jpg 1600w\" sizes=\"(max-width: 1020px) 100vw, 1020px\" \/>\t\t\t\t\t\t\n\t\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/a>\t\t\n<style>\n#image_587198450 {\n  width: 100%;\n}\n<\/style>\n\t<\/div>\n\t\n\t<div id=\"gap-526408560\" class=\"gap-element clearfix\" style=\"display:block; height:auto;\">\n\t\t\n<style>\n#gap-526408560 {\n  padding-top: 30px;\n}\n<\/style>\n\t<\/div>\n\t\n<p>An Automatic Transfer Switch (ATS) provides safe and dependable automatic transfer of electrical power from the utility main to the backup emergency power generator.<\/p>\n<p>Which switch transition type do you need OT, DT, CT and Bypass?<\/p>\n<h3>Open Type<\/h3>\n<p>&bull; 90% of all applications because it is the lowest cost<\/p>\n<p>&bull; No critical facility loads, that typically require more sophisticated transition options<\/p>\n<h3>Delayed Type<\/h3>\n<p>&bull; High in-rush current loads such as, large motors, compressors, etc<\/p>\n<p>&bull; Controllable delayed transition<\/p>\n<p>&bull; Example application; pumping stations, food and textile process facilities, and distribution facilities<\/p>\n<h3>Closed Type<\/h3>\n<p>&bull; Does not lose power &#8211; &#8220;make-before-brake&#8221; &#8211; on switch back from power outage<\/p>\n<p>&bull; Connection has both power sources available<\/p>\n<p>&bull; Example application; healthcare, data centers, heavy industrial facilities<\/p>\n<h3>Bypass<\/h3>\n<p>&bull; Bypass isolation with dual ATS mechanisms in parallel, packaged in one enclosure<\/p>\n<p>&bull; Redundant switching with total operational control and compartmentalized packaging<\/p>\n<p>&bull; Allows for maintenance to individual ATS packages while operational<\/p>\n<p>&bull; Example application; critical large institutions, zero downtime<\/p>\n<p>What is service entrance rated? &#8220;A service entrance-rated transfer switch is a transfer switch that contains an integrated disconnecting device and meets the grounding and bonding requirements of the National Electrical Code for service entrance use.&#8221; ref. <a href=\"https:\/\/www.ascopower.com\/us\/en\/faqs\/FAQ000234614\/\">Asco Power<\/a> <\/p>\n<h3>Other key parameters for Transfer Switch selection<\/h3>\n<p>&bull; Application Load Size<\/p>\n<p>&bull; Infrastructure Compatibility in Amp\/Volt\/Hz\/Poles<\/p>\n<p>&bull; Fault Rating<\/p>\n<p>&bull; NEMA Type Enclosures and Physical Size<\/p>\n<p>&bull; Code Requirements<\/p>\n<p>&bull; Customer Connection<\/p>\n<h3>Competitive features<\/h3>\n<p>&bull; Swappable Internal Components<\/p>\n<p>&bull; Wide Range 200-480V<\/p>\n<p>&bull; Touchscreen programmable<\/p>\n<p>&bull; Software controllable with Auto Calibration<\/p>\n<p>&bull; Alarms with Customizable Text\/Email Alerts<\/p>\n<p>&bull; Monitoring in the Cloud<\/p>\n<p>&bull; High Current Safety Alarms and Contact Wear Status<\/p>\n<p><a href=\"https:\/\/www.globalpwr.com\/contact\/\">Contact<\/a> our experienced sales team with any questions, quote requests, or expert advice you may need.<\/p>\n<a href=\"https:\/\/www.globalpwr.com\/automatic-transfer-switches\/\" class=\"button primary\"  >\n\t\t<span>Shop Automatic Transfer Switches<\/span>\n\t<\/a>\n\n","protected":false},"excerpt":{"rendered":"<p>Safe and dependable automatic transfer of electrical power but which transition type: OT, DT, CT and Bypass.<\/p>\n","protected":false},"author":17,"featured_media":21396,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"_searchwp_excluded":"","inline_featured_image":false,"footnotes":""},"categories":[1614],"tags":[1618,1622,1626],"class_list":["post-21395","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-all-post","tag-business-continuity","tag-emergency-generator","tag-power-preparedness"],"acf":[],"aioseo_notices":[],"amp_enabled":true,"_links":{"self":[{"href":"https:\/\/www.globalpwr.com\/wp-json\/wp\/v2\/posts\/21395","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.globalpwr.com\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.globalpwr.com\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.globalpwr.com\/wp-json\/wp\/v2\/users\/17"}],"replies":[{"embeddable":true,"href":"https:\/\/www.globalpwr.com\/wp-json\/wp\/v2\/comments?post=21395"}],"version-history":[{"count":0,"href":"https:\/\/www.globalpwr.com\/wp-json\/wp\/v2\/posts\/21395\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.globalpwr.com\/wp-json\/wp\/v2\/media\/21396"}],"wp:attachment":[{"href":"https:\/\/www.globalpwr.com\/wp-json\/wp\/v2\/media?parent=21395"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.globalpwr.com\/wp-json\/wp\/v2\/categories?post=21395"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.globalpwr.com\/wp-json\/wp\/v2\/tags?post=21395"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}