{"id":33513,"date":"2026-08-02T03:32:50","date_gmt":"2026-08-01T19:32:50","guid":{"rendered":"https:\/\/electricalcabinet.net\/?p=33513"},"modified":"2026-08-02T03:32:50","modified_gmt":"2026-08-01T19:32:50","slug":"box-type-substation-selection","status":"publish","type":"post","link":"https:\/\/electricalcabinet.net\/ja\/box-type-substation-selection\/","title":{"rendered":"Box-Type Substation: Components and Selection Inputs"},"content":{"rendered":"<p>A box-type substation brings defined medium-voltage, transformer, and low-voltage functions together in a compact enclosure or package. The name describes a configuration approach, not one universal transformer capacity, system voltage, protection scheme, or site-service scope.<\/p><div id=\"ez-toc-container\" class=\"ez-toc-v2_0_80 counter-hierarchy ez-toc-counter ez-toc-grey ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<div class=\"ez-toc-title ez-toc-toggle\" style=\"cursor:pointer\">\u76ee\u6b21<\/div>\n<span class=\"ez-toc-title-toggle\"><a href=\"#\" class=\"ez-toc-pull-right ez-toc-btn ez-toc-btn-xs ez-toc-btn-default ez-toc-toggle\" aria-label=\"\u30c8\u30b0\u30eb\u76ee\u6b21\"><span class=\"ez-toc-js-icon-con\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">\u30c8\u30b0\u30eb<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #999;color:#999\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewbox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #999;color:#999\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewbox=\"0 0 24 24\" version=\"1.2\" baseprofile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/span><\/span><\/a><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1 eztoc-toggle-hide-by-default' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/electricalcabinet.net\/ja\/box-type-substation-selection\/#What_a_box-type_substation_may_include\" >What a box-type substation may include<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/electricalcabinet.net\/ja\/box-type-substation-selection\/#Define_the_electrical_arrangement\" >Define the electrical arrangement<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/electricalcabinet.net\/ja\/box-type-substation-selection\/#Inputs_for_selection\" >Inputs for selection<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/electricalcabinet.net\/ja\/box-type-substation-selection\/#System_and_load_data\" >System and load data<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/electricalcabinet.net\/ja\/box-type-substation-selection\/#Site_and_installation_conditions\" >Site and installation conditions<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/electricalcabinet.net\/ja\/box-type-substation-selection\/#Protection_metering_and_control\" >Protection, metering, and control<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/electricalcabinet.net\/ja\/box-type-substation-selection\/#Enclosure_and_maintenance\" >Enclosure and maintenance<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"https:\/\/electricalcabinet.net\/ja\/box-type-substation-selection\/#Questions_for_a_box-type_substation_quotation\" >Questions for a box-type substation quotation<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-9\" href=\"https:\/\/electricalcabinet.net\/ja\/box-type-substation-selection\/#Product_reference\" >Product reference<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-10\" href=\"https:\/\/electricalcabinet.net\/ja\/box-type-substation-selection\/#Final_checklist\" >Final checklist<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-11\" href=\"https:\/\/electricalcabinet.net\/ja\/box-type-substation-selection\/#Box-type_substation_selection_inputs\" >Box-type substation selection inputs<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-12\" href=\"https:\/\/electricalcabinet.net\/ja\/box-type-substation-selection\/#Questions_for_a_quotation_request\" >Questions for a quotation request<\/a><\/li><\/ul><\/nav><\/div>\n\n<p>Before selecting a box-type substation, define the electrical arrangement, interfaces, environment, access, and documentation. This makes it possible to compare a product configuration with the actual project requirement.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"What_a_box-type_substation_may_include\"><\/span>What a box-type substation may include<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Depending on the design, a box-type substation may combine:<\/p>\n<p>&#8211; medium-voltage incoming and switching equipment; &#8211; transformer section; &#8211; low-voltage distribution or feeder section; &#8211; protection, metering, and control interfaces; &#8211; cable termination areas; and &#8211; enclosure, ventilation, access, and mounting provisions.<\/p>\n<p>The final arrangement varies by product and project. A generic box-type substation image or title does not establish the exact equipment included.<\/p>\n<p>The <a href=\"https:\/\/electricalcabinet.net\/ja\/packaged-substation-design\/\">Packaged Substation Design<\/a> article covers design inputs for a packaged configuration. The <a href=\"https:\/\/electricalcabinet.net\/ja\/prefabricated-substation-selection\/\">Prefabricated Substation Checklist<\/a> covers delivery, interface, and responsibility questions. This article focuses on the box-type equipment arrangement itself.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Define_the_electrical_arrangement\"><\/span>Define the electrical arrangement<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Provide the project single-line information and describe the relationship between the incoming supply, MV section, transformer, LV section, and connected loads. State whether the package includes switching, fuses, circuit breakers, metering, protection, or control interfaces.<\/p>\n<p>If the arrangement has a bypass, tie, spare feeder, future expansion, or alternate operating mode, write it into the requirement. Do not assume that a standard box-type package includes those functions.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Inputs_for_selection\"><\/span>Inputs for selection<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<h3><span class=\"ez-toc-section\" id=\"System_and_load_data\"><\/span>System and load data<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Provide supply information, transformer or load data, feeder count, operating mode, and future expansion assumptions. The exact ratings and protection depend on the project engineering information and the selected configuration.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Site_and_installation_conditions\"><\/span>Site and installation conditions<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Document indoor or outdoor location, ambient conditions, moisture, contamination, access, mounting or foundation, cable-entry direction, transport route, and lifting constraints. Identify who is responsible for civil work, installation, grounding, and field connections.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Protection_metering_and_control\"><\/span>Protection, metering, and control<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>List required protection functions, metering points, alarms, local or remote control, and communications. Protection coordination and settings must come from the project; they should not be inferred from the term \u201cbox-type.\u201d<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Enclosure_and_maintenance\"><\/span>Enclosure and maintenance<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Describe access direction, service boundaries, ventilation or thermal assumptions, materials, finish, and any required enclosure documentation. Verify NEMA, IP, UL, IEC, or other claims for the exact product and configuration.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Questions_for_a_box-type_substation_quotation\"><\/span>Questions for a box-type substation quotation<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Ask the supplier to identify:<\/p>\n<ol>\n<li>MV, transformer, and LV sections included;<\/li>\n<li>incoming and outgoing cable interfaces;<\/li>\n<li>switching, protection, metering, and control devices;<\/li>\n<li>transformer and load assumptions;<\/li>\n<li>enclosure, access, ventilation, and mounting requirements;<\/li>\n<li>transport, lifting, foundation, and site responsibilities;<\/li>\n<li>drawings, data sheets, manuals, inspection, and testing documents; and<\/li>\n<li>exclusions related to installation, commissioning, and local approvals.<\/li>\n<\/ol>\n<p>The answers should be tied to a section drawing and an equipment schedule. This prevents a product title from being used as a substitute for a documented configuration.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Product_reference\"><\/span>Product reference<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Review the <a href=\"https:\/\/electricalcabinet.net\/ja\/electrical-switchgear\/transformer-substation\/box-type-substation\/\">Box-Type Substation<\/a> product page after defining the project inputs. Where the project calls for another packaged or prefabricated arrangement, compare the actual sections, interfaces, and responsibilities rather than treating the product names as interchangeable.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Final_checklist\"><\/span>Final checklist<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Before approving a proposal, compare the project single-line, load and feeder schedule, protection and metering scope, site constraints, equipment section arrangement, documentation, and supplier exclusions. Do not publish or approve a specific voltage, capacity, fault duty, noise level, certification, or delivery claim until the exact proposed configuration has been reviewed.<\/p>\n<p><!-- Supplemental editorial section v1 --><\/p>\n<h2><span class=\"ez-toc-section\" id=\"Box-type_substation_selection_inputs\"><\/span>Box-type substation selection inputs<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Box-type substation selection should begin with the network function and site constraints, not with a generic enclosure name. Confirm the transformer arrangement, incoming and outgoing equipment, required switching and protection functions, cable interfaces, access, transport route, installation environment, and expansion expectations.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Questions_for_a_quotation_request\"><\/span>Questions for a quotation request<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<ol>\n<li>What system voltage, frequency, load, and transformer information is available?<\/li>\n<li>Which incoming, outgoing, switching, protection, and metering functions are required?<\/li>\n<li>Is the installation indoor or outdoor, and what environmental exposure must be considered?<\/li>\n<li>What footprint, access, lifting, cable-entry, and maintenance constraints apply?<\/li>\n<li>Which drawings, inspection records, and compliance documents are required?<\/li>\n<\/ol>\n<p>Box-type, packaged, and prefabricated descriptions can overlap in commercial language. Compare the actual configuration and documentation rather than treating the names as interchangeable. Related planning context is available in the <a href=\"https:\/\/electricalcabinet.net\/ja\/packaged-substation-design\/\">packaged substation design article<\/a>.<\/p>","protected":false},"excerpt":{"rendered":"<p>A box-type substation selection guide covering configuration, site conditions, equipment interfaces, quotation inputs, and documents.<\/p>","protected":false},"author":1,"featured_media":30707,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[444],"tags":[],"class_list":["post-33513","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-transformer-substations"],"jetpack_featured_media_url":"https:\/\/electricalcabinet.net\/wp-content\/uploads\/2024\/06\/YBMP-12-0.4-\u7cfb\u5217-\u7bb1\u5f0f\u53d8\u7535\u7ad9-1.jpg","jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/electricalcabinet.net\/ja\/wp-json\/wp\/v2\/posts\/33513","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/electricalcabinet.net\/ja\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/electricalcabinet.net\/ja\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/electricalcabinet.net\/ja\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/electricalcabinet.net\/ja\/wp-json\/wp\/v2\/comments?post=33513"}],"version-history":[{"count":3,"href":"https:\/\/electricalcabinet.net\/ja\/wp-json\/wp\/v2\/posts\/33513\/revisions"}],"predecessor-version":[{"id":33577,"href":"https:\/\/electricalcabinet.net\/ja\/wp-json\/wp\/v2\/posts\/33513\/revisions\/33577"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/electricalcabinet.net\/ja\/wp-json\/wp\/v2\/media\/30707"}],"wp:attachment":[{"href":"https:\/\/electricalcabinet.net\/ja\/wp-json\/wp\/v2\/media?parent=33513"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/electricalcabinet.net\/ja\/wp-json\/wp\/v2\/categories?post=33513"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/electricalcabinet.net\/ja\/wp-json\/wp\/v2\/tags?post=33513"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}