{"id":3559,"date":"2026-08-11T09:00:00","date_gmt":"2026-08-11T09:00:00","guid":{"rendered":"https:\/\/chac-electric.com\/blog\/shunt-trip-vs-alarm-switch-rfq\/"},"modified":"2026-08-11T09:00:00","modified_gmt":"2026-08-11T09:00:00","slug":"shunt-trip-vs-alarm-switch-rfq","status":"publish","type":"post","link":"https:\/\/chac-electric.com\/ar\/blog\/shunt-trip-vs-alarm-switch-rfq\/","title":{"rendered":"Which Breaker Accessory Matches a Remote Trip or Alarm Need?"},"content":{"rendered":"<div class=\"b2b-article\">\n<p style=\"margin:0 0 16px;line-height:1.7\"><strong>A remote breaker-opening command and a fault-alarm signal are different panel functions, so they need different RFQ language.<\/strong> Start by naming the action or event the control design needs, then ask the supplier to return selected-device documentation for the proposed accessory.<\/p>\n<figure style=\"margin:26px 0;text-align:center\"><img decoding=\"async\" style=\"max-width:640px;width:100%;height:auto;display:block;margin:0 auto;border-radius:8px\" alt=\"CHAC shunt trip accessory identification graphic for a breaker accessory RFQ\" src=\"https:\/\/chac-electric.com\/wp-content\/uploads\/2026\/08\/shunt-trip-vs-alarm-switch-rfq-overview.webp\" \/><\/figure>\n<nav class=\"b2b-toc\" style=\"background:#f5f8fa;padding:16px 20px;border-radius:8px;margin:0 0 24px\">\n<h2 id=\"contents\" style=\"margin:42px 0 14px;scroll-margin-top:96px\">\u0645\u062d\u062a\u0648\u064a\u0627\u062a<\/h2>\n<ul style=\"margin:0 0 18px 1.2em;line-height:1.7\">\n<li style=\"margin:0 0 8px\"><a href=\"#part-1-name-the-required-command-or-event-signal\">Part 1. Name the required command or event signal<\/a><\/li>\n<li style=\"margin:0 0 8px\"><a href=\"#part-2-keep-remote-opening-and-alarm-indication-separate\">Part 2. Keep remote opening and alarm indication separate<\/a><\/li>\n<li style=\"margin:0 0 8px\"><a href=\"#part-3-compare-the-evidence-for-each-accessory-request\">Part 3. Compare the evidence for each accessory request<\/a><\/li>\n<li style=\"margin:0 0 8px\"><a href=\"#part-4-connect-the-requested-signal-to-the-control-drawing\">Part 4. Connect the requested signal to the control drawing<\/a><\/li>\n<li style=\"margin:0 0 8px\"><a href=\"#part-5-build-a-breaker-accessory-rfq-that-can-be-reviewed\">Part 5. Build a breaker-accessory RFQ that can be reviewed<\/a><\/li>\n<li style=\"margin:0 0 8px\"><a href=\"#part-6-start-selected-accessory-review-with-chac-product-routes\">Part 6. Start selected-accessory review with CHAC product routes<\/a><\/li>\n<li style=\"margin:0 0 8px\"><a href=\"#part-7-keep-accessory-selection-within-its-fit-boundary\">Part 7. Keep accessory selection within its fit boundary<\/a><\/li>\n<\/ul>\n<\/nav>\n<h2 style=\"margin:42px 0 14px;scroll-margin-top:96px\" id=\"part-1-name-the-required-command-or-event-signal\">Part 1. Name the required command or event signal<\/h2>\n<p style=\"margin:0 0 16px;line-height:1.7\">Shunt trip versus alarm switch is not a choice between two labels. One request begins with an action: the control design needs a remote opening command. The other begins with an event: the design needs a defined alarm or indication signal. Put that distinction in the drawing and RFQ before a product name is discussed.<\/p>\n<p style=\"margin:0 0 16px;line-height:1.7\">This early step prevents a supplier from guessing whether the panel needs a command input, a reported event, or a combination that must be supported by separately documented accessory functions.<\/p>\n<h2 style=\"margin:42px 0 14px;scroll-margin-top:96px\" id=\"part-2-keep-remote-opening-and-alarm-indication-separate\">Part 2. Keep remote opening and alarm indication separate<\/h2>\n<p style=\"margin:0 0 16px;line-height:1.7\">A shunt-trip discussion asks how the selected accessory receives the remote action required by the control design. An alarm-switch discussion asks what event must be indicated and how that signal interfaces with the panel. The selected breaker and accessory documents must establish the final arrangement.<\/p>\n<p style=\"margin:0 0 16px;line-height:1.7\">The IEC document system and manufacturer material are useful places to frame the selected-device check. They do not turn a generic accessory name into a compatibility approval for a breaker family or a panel.<\/p>\n<blockquote>\n<p style=\"margin:0 0 16px;line-height:1.7\"><strong>\u0645\u0647\u0645:<\/strong> An alarm indication should not be treated as proof that the panel has the required remote opening action. Document the required command and the required event signal separately. (<a href=\"https:\/\/webstore.iec.ch\/\" rel=\"nofollow noopener\" target=\"_blank\">IEC control-device publications<\/a> \u2014 selected-document review context)<\/p>\n<\/blockquote>\n<h2 style=\"margin:42px 0 14px;scroll-margin-top:96px\" id=\"part-3-compare-the-evidence-for-each-accessory-request\">Part 3. Compare the evidence for each accessory request<\/h2>\n<p style=\"margin:0 0 16px;line-height:1.7\">The comparison below organizes a supplier conversation. It does not decide which accessory is compatible with a particular breaker.<\/p>\n<table style=\"width:100%;border-collapse:collapse\">\n<thead>\n<tr>\n<th style=\"border:1px solid #d9e1e8;padding:9px 12px;background:#f5f8fa;text-align:left\">Review question<\/th>\n<th style=\"border:1px solid #d9e1e8;padding:9px 12px;background:#f5f8fa;text-align:left\">Remote shunt-trip request<\/th>\n<th style=\"border:1px solid #d9e1e8;padding:9px 12px;background:#f5f8fa;text-align:left\">Alarm-switch request<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td style=\"border:1px solid #d9e1e8;padding:9px 12px\">Required function<\/td>\n<td style=\"border:1px solid #d9e1e8;padding:9px 12px\">State the required remote opening action<\/td>\n<td style=\"border:1px solid #d9e1e8;padding:9px 12px\">State the event or fault indication needed<\/td>\n<\/tr>\n<tr>\n<td style=\"border:1px solid #d9e1e8;padding:9px 12px\">\u0648\u0627\u062c\u0647\u0629 \u0627\u0644\u062a\u062d\u0643\u0645<\/td>\n<td style=\"border:1px solid #d9e1e8;padding:9px 12px\">Identify the available control supply and drawing reference<\/td>\n<td style=\"border:1px solid #d9e1e8;padding:9px 12px\">Identify the receiving control circuit and signal expectation<\/td>\n<\/tr>\n<tr>\n<td style=\"border:1px solid #d9e1e8;padding:9px 12px\">Selected assembly<\/td>\n<td style=\"border:1px solid #d9e1e8;padding:9px 12px\">Name breaker family and accessory route for review<\/td>\n<td style=\"border:1px solid #d9e1e8;padding:9px 12px\">Name breaker family and accessory route for review<\/td>\n<\/tr>\n<tr>\n<td style=\"border:1px solid #d9e1e8;padding:9px 12px\">Terminal evidence<\/td>\n<td style=\"border:1px solid #d9e1e8;padding:9px 12px\">Request selected-model terminal documentation<\/td>\n<td style=\"border:1px solid #d9e1e8;padding:9px 12px\">Request selected-model terminal documentation<\/td>\n<\/tr>\n<tr>\n<td style=\"border:1px solid #d9e1e8;padding:9px 12px\">Supplier return<\/td>\n<td style=\"border:1px solid #d9e1e8;padding:9px 12px\">Proposed model and documents supporting the command<\/td>\n<td style=\"border:1px solid #d9e1e8;padding:9px 12px\">Proposed model and documents supporting the event signal<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<figure style=\"margin:26px 0;text-align:center\"><img decoding=\"async\" style=\"max-width:640px;width:100%;height:auto;display:block;margin:0 auto;border-radius:8px\" alt=\"CHAC shunt trip accessory image for an evidence-led function review\" src=\"https:\/\/chac-electric.com\/wp-content\/uploads\/2026\/08\/shunt-trip-vs-alarm-switch-rfq-review.webp\" \/><\/figure>\n<p style=\"margin:0 0 16px;line-height:1.7\">When both functions are needed, list them separately. The comparison prevents a single vague phrase such as \u201cremote breaker signal\u201d from hiding a distinct action and indication requirement.<\/p>\n<h2 style=\"margin:42px 0 14px;scroll-margin-top:96px\" id=\"part-4-connect-the-requested-signal-to-the-control-drawing\">Part 4. Connect the requested signal to the control drawing<\/h2>\n<p style=\"margin:0 0 16px;line-height:1.7\">Use the control drawing to show where the command originates, what event must be reported, and where the relevant terminals appear in the panel scope. Add the drawing revision so that the supplier reviews the same interface the panel team is building.<\/p>\n<p style=\"margin:0 0 16px;line-height:1.7\">The related <a href=\"https:\/\/chac-electric.com\/ar\/%d9%85%d8%af%d9%88%d9%86%d8%a9\/mpcb-auxiliary-contact-panel-signals\/\">MPCB auxiliary-contact signal guide<\/a> offers a narrower status-signal perspective. For broader drawing-interface checks, review the <a href=\"https:\/\/chac-electric.com\/ar\/%d9%85%d8%af%d9%88%d9%86%d8%a9\/ac-contactor-control-wiring-panel-builders\/\">AC contactor control wiring article<\/a>.<\/p>\n<h2 style=\"margin:42px 0 14px;scroll-margin-top:96px\" id=\"part-5-build-a-breaker-accessory-rfq-that-can-be-reviewed\">Part 5. Build a breaker-accessory RFQ that can be reviewed<\/h2>\n<p style=\"margin:0 0 16px;line-height:1.7\">An accessory RFQ should identify the desired function before asking for a part number. Include the selected breaker family and the records that let a supplier return a checkable answer.<\/p>\n<table style=\"width:100%;border-collapse:collapse\">\n<thead>\n<tr>\n<th style=\"border:1px solid #d9e1e8;padding:9px 12px;background:#f5f8fa;text-align:left\">Send with the RFQ<\/th>\n<th style=\"border:1px solid #d9e1e8;padding:9px 12px;background:#f5f8fa;text-align:left\">\u0644\u0645\u0627\u0630\u0627 \u0647\u0630\u0627 \u0645\u0647\u0645<\/th>\n<th style=\"border:1px solid #d9e1e8;padding:9px 12px;background:#f5f8fa;text-align:left\">Evidence requested back<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td style=\"border:1px solid #d9e1e8;padding:9px 12px\">Current control drawing and revision<\/td>\n<td style=\"border:1px solid #d9e1e8;padding:9px 12px\">Establishes command, signal, and terminal context<\/td>\n<td style=\"border:1px solid #d9e1e8;padding:9px 12px\">Proposed accessory matched to the stated function<\/td>\n<\/tr>\n<tr>\n<td style=\"border:1px solid #d9e1e8;padding:9px 12px\">Required action or event definition<\/td>\n<td style=\"border:1px solid #d9e1e8;padding:9px 12px\">Separates remote opening from indication<\/td>\n<td style=\"border:1px solid #d9e1e8;padding:9px 12px\">Function statement in selected documentation<\/td>\n<\/tr>\n<tr>\n<td style=\"border:1px solid #d9e1e8;padding:9px 12px\">Breaker family and proposed assembly scope<\/td>\n<td style=\"border:1px solid #d9e1e8;padding:9px 12px\">Makes the compatibility question specific<\/td>\n<td style=\"border:1px solid #d9e1e8;padding:9px 12px\">Selected breaker-and-accessory identification<\/td>\n<\/tr>\n<tr>\n<td style=\"border:1px solid #d9e1e8;padding:9px 12px\">Control supply and terminal requirements<\/td>\n<td style=\"border:1px solid #d9e1e8;padding:9px 12px\">Identifies interface conditions to review<\/td>\n<td style=\"border:1px solid #d9e1e8;padding:9px 12px\">Terminal and interface documents<\/td>\n<\/tr>\n<tr>\n<td style=\"border:1px solid #d9e1e8;padding:9px 12px\">Enclosure and project context<\/td>\n<td style=\"border:1px solid #d9e1e8;padding:9px 12px\">Identifies conditions requiring confirmation<\/td>\n<td style=\"border:1px solid #d9e1e8;padding:9px 12px\">Stated limits and installation information<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p style=\"margin:0 0 16px;line-height:1.7\">\u0627\u0644 <a href=\"https:\/\/chac-electric.com\/ar\/%d8%a7%d9%84%d8%a3%d8%ac%d9%87%d8%b2%d8%a9-%d8%a7%d9%84%d9%83%d9%87%d8%b1%d8%a8%d8%a7%d8%a6%d9%8a%d8%a9-%d8%a7%d9%84%d8%b7%d8%b1%d9%81%d9%8a%d8%a9\/\">terminal electrical appliances category<\/a> provides the upward product-family context. Keep custom labeling or documentation requirements visible through the <a href=\"https:\/\/chac-electric.com\/ar\/%d8%aa%d8%ae%d8%b5%d9%8a%d8%b5-%d8%a7%d9%84%d9%85%d9%86%d8%aa%d8%ac%d8%a7%d8%aa-%d8%a7%d9%84%d9%83%d9%87%d8%b1%d8%a8%d8%a7%d8%a6%d9%8a%d8%a9-%d8%a7%d9%84%d8%b7%d8%b1%d9%81%d9%8a%d8%a9\/\">\u0635\u0641\u062d\u0629 \u062a\u062e\u0635\u064a\u0635 \u0627\u0644\u062a\u0648\u0635\u064a\u0644\u0627\u062a \u0627\u0644\u0643\u0647\u0631\u0628\u0627\u0626\u064a\u0629<\/a>.<\/p>\n<h2 style=\"margin:42px 0 14px;scroll-margin-top:96px\" id=\"part-6-start-selected-accessory-review-with-chac-product-routes\">Part 6. Start selected-accessory review with CHAC product routes<\/h2>\n<p style=\"margin:0 0 16px;line-height:1.7\">For a remote-opening requirement, the <a href=\"https:\/\/chac-electric.com\/ar\/product\/cqam2-series-remote-shunt-trip-switch\/\">CQAM2 remote shunt-trip product route<\/a> is a first-party discussion starting point. When the requirement is event indication, the <a href=\"https:\/\/chac-electric.com\/ar\/product\/cqas2-alarm-switch-for-ac-230v-and-dc-110v-applications\/\">CQAS2 alarm-switch product route<\/a> provides a separate route. Each must still be reviewed against the breaker family and panel evidence.<\/p>\n<figure style=\"margin:26px 0;text-align:center\"><img decoding=\"async\" style=\"max-width:640px;width:100%;height:auto;display:block;margin:0 auto;border-radius:8px\" alt=\"CHAC breaker accessory product route for a documented remote-trip discussion\" src=\"https:\/\/chac-electric.com\/wp-content\/uploads\/2026\/08\/shunt-trip-vs-alarm-switch-rfq-product.webp\" \/><\/figure>\n<h3 style=\"margin:28px 0 12px\">\u062a\u0648\u0635\u064a\u0629 \u0628\u0627\u0644\u0645\u0646\u062a\u062c<\/h3>\n<p style=\"margin:0 0 16px;line-height:1.7\">Use the CQAM2 route after the RFQ clearly states that remote opening is the required action. Do not replace that requirement with an alarm switch merely because both appear in a breaker-accessories conversation; a reported event does not establish a command function.<\/p>\n<h2 style=\"margin:42px 0 14px;scroll-margin-top:96px\" id=\"part-7-keep-accessory-selection-within-its-fit-boundary\">Part 7. Keep accessory selection within its fit boundary<\/h2>\n<p style=\"margin:0 0 16px;line-height:1.7\">This article is useful for early function scoping and accessory-document comparison. It is not a live-work procedure, a final panel control design, local approval advice, or a declaration that an accessory fits an unspecified breaker.<\/p>\n<p style=\"margin:0 0 16px;line-height:1.7\">Fit Boundary: retain final selection with the approved drawing, selected breaker-and-accessory documents, applicable project requirements, and qualified engineering review. Send the function definition and drawing revision to <a href=\"https:\/\/chac-electric.com\/ar\/%d8%a7%d8%aa%d8%b5%d9%84-%d8%a8%d9%86%d8%a7\/\">\u0634\u0627\u0643 \u0625\u0644\u0643\u062a\u0631\u064a\u0643<\/a> when requesting a documented product route.<\/p>\n<h2 style=\"margin:42px 0 14px;scroll-margin-top:96px\" id=\"faqs\">\u0627\u0644\u0623\u0633\u0626\u0644\u0629 \u0627\u0644\u0645\u062a\u0643\u0631\u0631\u0629<\/h2>\n<h3 style=\"margin:28px 0 12px\">What does a shunt trip do on a circuit breaker?<\/h3>\n<p style=\"margin:0 0 16px;line-height:1.7\">It is discussed when the panel needs a defined remote opening action. The selected breaker-and-accessory documents must confirm the actual arrangement.<\/p>\n<h3 style=\"margin:28px 0 12px\">What does an alarm switch report?<\/h3>\n<p style=\"margin:0 0 16px;line-height:1.7\">It is requested for a defined alarm or event indication in the control design. State the event and receiving interface in the RFQ.<\/p>\n<h3 style=\"margin:28px 0 12px\">Can an alarm switch open a breaker remotely?<\/h3>\n<p style=\"margin:0 0 16px;line-height:1.7\">Do not assume that it can. Remote opening and event indication should be specified as separate functions and confirmed in selected documentation.<\/p>\n<h3 style=\"margin:28px 0 12px\">Which voltage information belongs in the request?<\/h3>\n<p style=\"margin:0 0 16px;line-height:1.7\">Provide the available control supply and the selected interface requirements shown on the current drawing. The supplier can then return documentation for the proposed accessory.<\/p>\n<h3 style=\"margin:28px 0 12px\">How is accessory compatibility confirmed?<\/h3>\n<p style=\"margin:0 0 16px;line-height:1.7\">Identify the breaker family, proposed accessory, terminal requirements, and drawing context, then review the selected assembly documents rather than a generic catalog category.<\/p>\n<h3 style=\"margin:28px 0 12px\">What should be on a breaker accessory RFQ?<\/h3>\n<p style=\"margin:0 0 16px;line-height:1.7\">Include the control drawing revision, function definition, breaker family, control supply, terminal requirements, enclosure context, and the documentation expected with the quote.<\/p>\n<h2 style=\"margin:42px 0 14px;scroll-margin-top:96px\" id=\"references\">\u0627\u0644\u0645\u0631\u0627\u062c\u0639<\/h2>\n<ul style=\"margin:0 0 18px 1.2em;line-height:1.7\">\n<li style=\"margin:0 0 8px\"><a href=\"https:\/\/webstore.iec.ch\/\" rel=\"nofollow noopener\" target=\"_blank\">IEC control-device document catalog<\/a><\/li>\n<li style=\"margin:0 0 8px\"><a href=\"https:\/\/www.iec.ch\/standardsdev\" rel=\"nofollow noopener\" target=\"_blank\">IEC standards-system development overview<\/a><\/li>\n<li style=\"margin:0 0 8px\"><a href=\"https:\/\/www.eaton.com\/us\/en-us\/products\/electrical-circuit-protection.html\" rel=\"nofollow noopener\" target=\"_blank\">Eaton electrical protection product-resource center<\/a><\/li>\n<li style=\"margin:0 0 8px\"><a href=\"https:\/\/www.se.com\/ww\/en\/work\/products\/electrical-distribution\/\" rel=\"nofollow noopener\" target=\"_blank\">Schneider Electric low-voltage distribution resources<\/a><\/li>\n<\/ul>\n<\/div>","protected":false},"excerpt":{"rendered":"<p>A remote breaker-opening command and a fault-alarm signal are different panel functions, so they need different RFQ language. Start by naming the action or event the control design needs, then ask the supplier to return selected-device documentation for the proposed accessory. Contents Part 1. Name the required command or event signal Part 2. Keep remote [&hellip;]<\/p>\n","protected":false},"author":10,"featured_media":3553,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[1],"tags":[],"class_list":["post-3559","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog"],"blocksy_meta":{"styles_descriptor":{"styles":{"desktop":"","tablet":"","mobile":""},"google_fonts":[],"version":7}},"acf":[],"_links":{"self":[{"href":"https:\/\/chac-electric.com\/ar\/wp-json\/wp\/v2\/posts\/3559","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/chac-electric.com\/ar\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/chac-electric.com\/ar\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/chac-electric.com\/ar\/wp-json\/wp\/v2\/users\/10"}],"replies":[{"embeddable":true,"href":"https:\/\/chac-electric.com\/ar\/wp-json\/wp\/v2\/comments?post=3559"}],"version-history":[{"count":0,"href":"https:\/\/chac-electric.com\/ar\/wp-json\/wp\/v2\/posts\/3559\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/chac-electric.com\/ar\/wp-json\/wp\/v2\/media\/3553"}],"wp:attachment":[{"href":"https:\/\/chac-electric.com\/ar\/wp-json\/wp\/v2\/media?parent=3559"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/chac-electric.com\/ar\/wp-json\/wp\/v2\/categories?post=3559"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/chac-electric.com\/ar\/wp-json\/wp\/v2\/tags?post=3559"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}