{"id":5857,"date":"2025-11-26T02:35:52","date_gmt":"2025-11-26T02:35:52","guid":{"rendered":"https:\/\/www.ketetransformer.com\/?p=5857"},"modified":"2025-11-26T05:36:28","modified_gmt":"2025-11-26T05:36:28","slug":"ultimate-knowledge-guide-to-dry-type-transformers-complete-overview-technical-insights","status":"publish","type":"post","link":"https:\/\/www.ketetransformer.com\/fr\/ultimate-knowledge-guide-to-dry-type-transformers-complete-overview-technical-insights\/","title":{"rendered":"Guide complet sur les transformateurs \u00e0 sec | Pr\u00e9sentation g\u00e9n\u00e9rale et informations techniques"},"content":{"rendered":"\t\t<div data-elementor-type=\"wp-post\" data-elementor-id=\"5857\" class=\"elementor elementor-5857\" data-elementor-post-type=\"post\">\n\t\t\t\t<div class=\"elementor-element elementor-element-433bd68 e-flex e-con-boxed e-con e-parent\" data-id=\"433bd68\" data-element_type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-48e4914 elementor-widget elementor-widget-text-editor\" data-id=\"48e4914\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p>With the rapid development of the global economy, <strong>dry-type transformers<\/strong> have experienced significant growth worldwide. In the field of distribution transformers in particular, the market share of dry-type units has been increasing year by year. In many countries, dry-type transformers now account for 40\u201350% of all distribution transformers.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-cb27279 elementor-toc--minimized-on-tablet elementor-widget elementor-widget-table-of-contents\" data-id=\"cb27279\" data-element_type=\"widget\" data-settings=\"{&quot;headings_by_tags&quot;:[&quot;h4&quot;,&quot;h5&quot;,&quot;h6&quot;],&quot;exclude_headings_by_selector&quot;:[],&quot;no_headings_message&quot;:&quot;No headings were found on this page.&quot;,&quot;marker_view&quot;:&quot;numbers&quot;,&quot;minimize_box&quot;:&quot;yes&quot;,&quot;minimized_on&quot;:&quot;tablet&quot;,&quot;hierarchical_view&quot;:&quot;yes&quot;,&quot;min_height&quot;:{&quot;unit&quot;:&quot;px&quot;,&quot;size&quot;:&quot;&quot;,&quot;sizes&quot;:[]},&quot;min_height_tablet&quot;:{&quot;unit&quot;:&quot;px&quot;,&quot;size&quot;:&quot;&quot;,&quot;sizes&quot;:[]},&quot;min_height_mobile&quot;:{&quot;unit&quot;:&quot;px&quot;,&quot;size&quot;:&quot;&quot;,&quot;sizes&quot;:[]}}\" data-widget_type=\"table-of-contents.default\">\n\t\t\t\t\t\t\t\t\t<div class=\"elementor-toc__header\">\n\t\t\t\t\t\t<h4 class=\"elementor-toc__header-title\">\n\t\t\t\tTable of Contents\t\t\t<\/h4>\n\t\t\t\t\t\t\t\t\t\t<div class=\"elementor-toc__toggle-button elementor-toc__toggle-button--expand\" role=\"button\" tabindex=\"0\" aria-controls=\"elementor-toc__cb27279\" aria-expanded=\"true\" aria-label=\"\u0641\u062a\u062d \u062c\u062f\u0648\u0644 \u0627\u0644\u0645\u062d\u062a\u0648\u064a\u0627\u062a\"><svg aria-hidden=\"true\" class=\"e-font-icon-svg e-fas-chevron-down\" viewBox=\"0 0 448 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M207.029 381.476L12.686 187.132c-9.373-9.373-9.373-24.569 0-33.941l22.667-22.667c9.357-9.357 24.522-9.375 33.901-.04L224 284.505l154.745-154.021c9.379-9.335 24.544-9.317 33.901.04l22.667 22.667c9.373 9.373 9.373 24.569 0 33.941L240.971 381.476c-9.373 9.372-24.569 9.372-33.942 0z\"><\/path><\/svg><\/div>\n\t\t\t\t<div class=\"elementor-toc__toggle-button elementor-toc__toggle-button--collapse\" role=\"button\" tabindex=\"0\" aria-controls=\"elementor-toc__cb27279\" aria-expanded=\"true\" aria-label=\"\u0625\u063a\u0644\u0627\u0642 \u062c\u062f\u0648\u0644 \u0627\u0644\u0645\u062d\u062a\u0648\u064a\u0627\u062a\"><svg aria-hidden=\"true\" class=\"e-font-icon-svg e-fas-chevron-up\" viewBox=\"0 0 448 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M240.971 130.524l194.343 194.343c9.373 9.373 9.373 24.569 0 33.941l-22.667 22.667c-9.357 9.357-24.522 9.375-33.901.04L224 227.495 69.255 381.516c-9.379 9.335-24.544 9.317-33.901-.04l-22.667-22.667c-9.373-9.373-9.373-24.569 0-33.941L207.03 130.525c9.372-9.373 24.568-9.373 33.941-.001z\"><\/path><\/svg><\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<div id=\"elementor-toc__cb27279\" class=\"elementor-toc__body\">\n\t\t\t<div class=\"elementor-toc__spinner-container\">\n\t\t\t\t<svg class=\"elementor-toc__spinner eicon-animation-spin e-font-icon-svg e-eicon-loading\" aria-hidden=\"true\" viewBox=\"0 0 1000 1000\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M500 975V858C696 858 858 696 858 500S696 142 500 142 142 304 142 500H25C25 237 238 25 500 25S975 237 975 500 763 975 500 975Z\"><\/path><\/svg>\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-9736800 elementor-widget elementor-widget-text-editor\" data-id=\"9736800\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<h5>Structural Features of Dry-Type Transformers<\/h5>\n<ul>\n<li>Safe, fire-resistant, and environmentally friendly, allowing installation and operation directly at load centers.<\/li>\n<li>Manufactured with advanced domestic technology, offering high mechanical strength, strong short-circuit resistance, low partial discharge, excellent thermal stability, high reliability, and long service life.<\/li>\n<li>Low loss, low noise, and significant energy-saving performance, with no need for maintenance.<\/li>\n<li>Excellent heat dissipation and strong overload capacity; capacity can be increased under forced-air cooling conditions.<\/li>\n<li>Superior moisture resistance, suitable for high-humidity or harsh environmental conditions.<\/li>\n<li>Can be equipped with a comprehensive temperature monitoring and protection system. The intelligent temperature control unit automatically detects and cyclically displays the operating temperature of each phase winding, and can automatically start\/stop cooling fans while providing alarm and trip functions.<\/li>\n<li>Compact size, lightweight design, minimal footprint, and low installation cost.<\/li>\n<\/ul>\n<h5>Structural Designs<\/h5>\n<ul data-start=\"1586\" data-end=\"2340\">\n<li data-start=\"1586\" data-end=\"1864\">\n<p data-start=\"1589\" data-end=\"1864\">Open Type<br data-start=\"1602\" data-end=\"1605\" \/>A common structure where the transformer body is in direct contact with the atmosphere. Suitable for clean and relatively dry indoor environments (relative humidity \u2264 85% at 20\u00b0C). Cooling methods include natural air cooling and forced-air cooling.<\/p>\n<\/li>\n<li data-start=\"1866\" data-end=\"2149\">\n<p data-start=\"1869\" data-end=\"2149\">Enclosed Type<br data-start=\"1886\" data-end=\"1889\" \/>The transformer body is housed in a sealed enclosure and does not come into direct contact with the atmosphere. Due to poorer sealing and heat dissipation conditions, this type is mainly used in mining applications as an explosion-proof transformer.<\/p>\n<\/li>\n<li data-start=\"2151\" data-end=\"2340\">\n<p data-start=\"2154\" data-end=\"2340\">Cast-Resin Type<br data-start=\"2173\" data-end=\"2176\" \/>Epoxy resin or other resin materials are used for the main insulation. This structure is simple, compact, and typically used for small-capacity transformers.<\/p>\n<\/li>\n<\/ul>\n<h5>Cooling Methods<\/h5>\n<p style=\"padding-left: 40px;\" data-start=\"2435\" data-end=\"2793\">Dry-type transformers are cooled using either natural air cooling (AN) or forced-air cooling (AF).<\/p>\n<p style=\"padding-left: 40px;\" data-start=\"2435\" data-end=\"2793\">Under natural air cooling, the transformer can operate continuously at its rated capacity. With forced-air cooling, the output capacity may be increased by up to 50%, making it suitable for intermittent overload or emergency overload conditions.<\/p>\n<p style=\"padding-left: 40px;\" data-start=\"2795\" data-end=\"3003\">However, due to increased load losses and higher impedance voltage under overload, the transformer enters a non-economic operating state. Therefore, continuous long-term overload operation is not recommended.<\/p>\n<h5 data-start=\"3010\" data-end=\"3049\">Product Selection Guidelines<\/h5>\n<h6 data-start=\"3051\" data-end=\"3110\">\u00a0 \u00a0 \u00a0 1. Selecting Transformers Based on Load Characteristics<\/h6>\n<ul data-start=\"3111\" data-end=\"3749\">\n<li data-start=\"3111\" data-end=\"3428\">\n<p data-start=\"3113\" data-end=\"3428\">When there is a large amount of first- or second-class load, two or more transformers should be installed. If one transformer is disconnected, the remaining units must still be able to supply all Level 1 and Level 2 loads. These important loads should be concentrated as much as possible instead of being scattered.<\/p>\n<\/li>\n<li data-start=\"3429\" data-end=\"3587\">\n<p data-start=\"3431\" data-end=\"3587\">For large seasonal loads, dedicated transformers are recommended, such as air-conditioning chillers or electric heating loads in large commercial buildings.<\/p>\n<\/li>\n<li data-start=\"3588\" data-end=\"3749\">\n<p data-start=\"3590\" data-end=\"3749\">For large concentrated loads, dedicated transformers should also be installed, such as large heating equipment, large X-ray machines, or electric arc furnaces.<\/p>\n<\/li>\n<\/ul>\n<h6 data-start=\"3751\" data-end=\"3801\">\u00a0 \u00a0 \u00a0 2. Environmental and Structural Considerations<\/h6>\n<ul data-start=\"3802\" data-end=\"4485\">\n<li data-start=\"3802\" data-end=\"4030\">\n<p data-start=\"3804\" data-end=\"4030\">Under normal environmental conditions, either oil-immersed or dry-type transformers may be selected\u2014for example, in industrial plants, agricultural power stations, or standalone substation rooms within residential communities.<\/p>\n<\/li>\n<li data-start=\"4031\" data-end=\"4137\">\n<p data-start=\"4033\" data-end=\"4137\">In multi-story or high-rise buildings, non-flammable or flame-retardant transformers should be used.<\/p>\n<\/li>\n<li data-start=\"4138\" data-end=\"4250\">\n<p data-start=\"4140\" data-end=\"4250\">In dusty or corrosive environments, enclosed or sealed transformers are required to ensure safe operation.<\/p>\n<\/li>\n<li data-start=\"4251\" data-end=\"4485\">\n<p data-start=\"4253\" data-end=\"4485\">High- and low-voltage equipment without flammable oil and non\u2013oil-immersed distribution transformers may be installed in the same room. In such cases, transformers should be equipped with an IP2X protective enclosure for safety.<\/p>\n<\/li>\n<\/ul>\n<h5 data-start=\"4492\" data-end=\"4520\">Installation Notes<\/h5>\n<p style=\"padding-left: 40px;\" data-start=\"4522\" data-end=\"4584\">Distribution transformers are key components of substations.<\/p>\n<ul data-start=\"4585\" data-end=\"4835\">\n<li data-start=\"4585\" data-end=\"4704\">\n<p data-start=\"4587\" data-end=\"4704\">Dry-type transformers without enclosures are directly installed on the ground and protected by safety barriers.<\/p>\n<\/li>\n<li data-start=\"4705\" data-end=\"4835\">\n<p data-start=\"4707\" data-end=\"4835\">Dry-type transformers with enclosures can also be directly installed on the ground without additional protective structures.<\/p>\n<\/li>\n<\/ul>\n<h5 data-start=\"4842\" data-end=\"4890\">Applications of Dry-Type Transformers<\/h5>\n<p style=\"padding-left: 40px;\" data-start=\"4892\" data-end=\"5167\">Since dry-type transformers contain no oil, they eliminate risks such as fire, explosion, and pollution. As a result, they do not require installation in a dedicated transformer room, enabling both transformers and other electrical equipment to be installed in the same room.<\/p>\n<h5 data-start=\"5174\" data-end=\"5243\">Comparison Between Dry-Type and Oil-Immersed Transformers<\/h5>\n<p style=\"padding-left: 40px;\" data-start=\"5245\" data-end=\"5555\">Dry-type and oil-immersed transformers are the two most widely used transformer types. Compared with oil-immersed transformers, dry-type transformers offer superior fire safety, making them suitable for locations with strict fire protection requirements such as hospitals, airports, and railway stations.<\/p>\n<p style=\"text-align: left; padding-left: 40px;\" data-start=\"5557\" data-end=\"5760\">However, dry-type transformers are generally more expensive and have certain environmental requirements\u2014for example, they should not be installed in overly humid, dusty, or heavily polluted environments.<\/p>\n<p data-start=\"2795\" data-end=\"3003\">\u00a0<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-9e38bbc elementor-widget elementor-widget-image\" data-id=\"9e38bbc\" data-element_type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img fetchpriority=\"high\" decoding=\"async\" width=\"800\" height=\"800\" src=\"https:\/\/www.ketetransformer.com\/wp-content\/uploads\/2025\/08\/Dry-type-grounding-transformer-1.jpg\" class=\"attachment-large size-large wp-image-5708\" alt=\"\" srcset=\"https:\/\/www.ketetransformer.com\/wp-content\/uploads\/2025\/08\/Dry-type-grounding-transformer-1.jpg 800w, https:\/\/www.ketetransformer.com\/wp-content\/uploads\/2025\/08\/Dry-type-grounding-transformer-1-300x300.jpg 300w, https:\/\/www.ketetransformer.com\/wp-content\/uploads\/2025\/08\/Dry-type-grounding-transformer-1-150x150.jpg 150w, https:\/\/www.ketetransformer.com\/wp-content\/uploads\/2025\/08\/Dry-type-grounding-transformer-1-768x768.jpg 768w, https:\/\/www.ketetransformer.com\/wp-content\/uploads\/2025\/08\/Dry-type-grounding-transformer-1-600x600.jpg 600w, https:\/\/www.ketetransformer.com\/wp-content\/uploads\/2025\/08\/Dry-type-grounding-transformer-1-100x100.jpg 100w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/>\t\t\t\t\t\t\t\t\t\t\t\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>With the rapid development of the global economy, dry-type transformers have experienced significant growth worldwide. In the field of distribution transformers in particular, the market share of dry-type units has been increasing year by year. In many countries, dry-type transformers now account for 40\u201350% of all distribution transformers. Table of Contents Structural Features of Dry-Type 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center\";s:15:\"background-size\";s:4:\"auto\";s:21:\"background-attachment\";s:6:\"scroll\";s:15:\"background-type\";s:0:\"\";s:16:\"background-media\";s:0:\"\";s:12:\"overlay-type\";s:0:\"\";s:13:\"overlay-color\";s:0:\"\";s:15:\"overlay-opacity\";s:0:\"\";s:16:\"overlay-gradient\";s:0:\"\";}}"],"footnotes":[""],"_elementor_edit_mode":["builder"],"_elementor_template_type":["wp-post"],"_elementor_data":["[{\"id\":\"433bd68\",\"elType\":\"container\",\"settings\":{\"flex_direction\":\"column\",\"padding\":{\"unit\":\"px\",\"top\":\"0\",\"right\":\"0\",\"bottom\":\"0\",\"left\":\"0\",\"isLinked\":false}},\"elements\":[{\"id\":\"48e4914\",\"elType\":\"widget\",\"settings\":{\"editor\":\"<p>With the rapid development of the global economy, <strong>dry-type transformers<\\\/strong> have experienced significant growth worldwide. In the field of distribution transformers in particular, the market share of dry-type units has been increasing year by year. In many countries, dry-type transformers now account for 40\\u201350% of all distribution transformers.<\\\/p>\"},\"elements\":[],\"widgetType\":\"text-editor\"},{\"id\":\"cb27279\",\"elType\":\"widget\",\"settings\":{\"title\":\"Table of Contents\",\"headings_by_tags\":[\"h4\",\"h5\",\"h6\"],\"exclude_headings_by_selector\":[],\"no_headings_message\":\"No headings were found on this page.\",\"header_typography_typography\":\"custom\",\"header_typography_font_family\":\"Arial\",\"header_typography_font_size\":{\"unit\":\"px\",\"size\":20,\"sizes\":[]},\"header_typography_font_weight\":\"600\",\"header_typography_line_height\":{\"unit\":\"px\",\"size\":2,\"sizes\":[]},\"header_typography_word_spacing\":{\"unit\":\"px\",\"size\":0,\"sizes\":[]}},\"elements\":[],\"widgetType\":\"table-of-contents\"},{\"id\":\"9736800\",\"elType\":\"widget\",\"settings\":{\"editor\":\"<h5>Structural Features of Dry-Type Transformers<\\\/h5>\\n<ul>\\n<li>Safe, fire-resistant, and environmentally friendly, allowing installation and operation directly at load centers.<\\\/li>\\n<li>Manufactured with advanced domestic technology, offering high mechanical strength, strong short-circuit resistance, low partial discharge, excellent thermal stability, high reliability, and long service life.<\\\/li>\\n<li>Low loss, low noise, and significant energy-saving performance, with no need for maintenance.<\\\/li>\\n<li>Excellent heat dissipation and strong overload capacity; capacity can be increased under forced-air cooling conditions.<\\\/li>\\n<li>Superior moisture resistance, suitable for high-humidity or harsh environmental conditions.<\\\/li>\\n<li>Can be equipped with a comprehensive temperature monitoring and protection system. The intelligent temperature control unit automatically detects and cyclically displays the operating temperature of each phase winding, and can automatically start\\\/stop cooling fans while providing alarm and trip functions.<\\\/li>\\n<li>Compact size, lightweight design, minimal footprint, and low installation cost.<\\\/li>\\n<\\\/ul>\\n<h5>Structural Designs<\\\/h5>\\n<ul data-start=\\\"1586\\\" data-end=\\\"2340\\\">\\n<li data-start=\\\"1586\\\" data-end=\\\"1864\\\">\\n<p data-start=\\\"1589\\\" data-end=\\\"1864\\\">Open Type<br data-start=\\\"1602\\\" data-end=\\\"1605\\\" \\\/>A common structure where the transformer body is in direct contact with the atmosphere. Suitable for clean and relatively dry indoor environments (relative humidity \\u2264 85% at 20\\u00b0C). Cooling methods include natural air cooling and forced-air cooling.<\\\/p>\\n<\\\/li>\\n<li data-start=\\\"1866\\\" data-end=\\\"2149\\\">\\n<p data-start=\\\"1869\\\" data-end=\\\"2149\\\">Enclosed Type<br data-start=\\\"1886\\\" data-end=\\\"1889\\\" \\\/>The transformer body is housed in a sealed enclosure and does not come into direct contact with the atmosphere. Due to poorer sealing and heat dissipation conditions, this type is mainly used in mining applications as an explosion-proof transformer.<\\\/p>\\n<\\\/li>\\n<li data-start=\\\"2151\\\" data-end=\\\"2340\\\">\\n<p data-start=\\\"2154\\\" data-end=\\\"2340\\\">Cast-Resin Type<br data-start=\\\"2173\\\" data-end=\\\"2176\\\" \\\/>Epoxy resin or other resin materials are used for the main insulation. This structure is simple, compact, and typically used for small-capacity transformers.<\\\/p>\\n<\\\/li>\\n<\\\/ul>\\n<h5>Cooling Methods<\\\/h5>\\n<p style=\\\"padding-left: 40px;\\\" data-start=\\\"2435\\\" data-end=\\\"2793\\\">Dry-type transformers are cooled using either natural air cooling (AN) or forced-air cooling (AF).<\\\/p>\\n<p style=\\\"padding-left: 40px;\\\" data-start=\\\"2435\\\" data-end=\\\"2793\\\">Under natural air cooling, the transformer can operate continuously at its rated capacity. With forced-air cooling, the output capacity may be increased by up to 50%, making it suitable for intermittent overload or emergency overload conditions.<\\\/p>\\n<p style=\\\"padding-left: 40px;\\\" data-start=\\\"2795\\\" data-end=\\\"3003\\\">However, due to increased load losses and higher impedance voltage under overload, the transformer enters a non-economic operating state. Therefore, continuous long-term overload operation is not recommended.<\\\/p>\\n<h5 data-start=\\\"3010\\\" data-end=\\\"3049\\\">Product Selection Guidelines<\\\/h5>\\n<h6 data-start=\\\"3051\\\" data-end=\\\"3110\\\">\\u00a0 \\u00a0 \\u00a0 1. Selecting Transformers Based on Load Characteristics<\\\/h6>\\n<ul data-start=\\\"3111\\\" data-end=\\\"3749\\\">\\n<li data-start=\\\"3111\\\" data-end=\\\"3428\\\">\\n<p data-start=\\\"3113\\\" data-end=\\\"3428\\\">When there is a large amount of first- or second-class load, two or more transformers should be installed. If one transformer is disconnected, the remaining units must still be able to supply all Level 1 and Level 2 loads. These important loads should be concentrated as much as possible instead of being scattered.<\\\/p>\\n<\\\/li>\\n<li data-start=\\\"3429\\\" data-end=\\\"3587\\\">\\n<p data-start=\\\"3431\\\" data-end=\\\"3587\\\">For large seasonal loads, dedicated transformers are recommended, such as air-conditioning chillers or electric heating loads in large commercial buildings.<\\\/p>\\n<\\\/li>\\n<li data-start=\\\"3588\\\" data-end=\\\"3749\\\">\\n<p data-start=\\\"3590\\\" data-end=\\\"3749\\\">For large concentrated loads, dedicated transformers should also be installed, such as large heating equipment, large X-ray machines, or electric arc furnaces.<\\\/p>\\n<\\\/li>\\n<\\\/ul>\\n<h6 data-start=\\\"3751\\\" data-end=\\\"3801\\\">\\u00a0 \\u00a0 \\u00a0 2. Environmental and Structural Considerations<\\\/h6>\\n<ul data-start=\\\"3802\\\" data-end=\\\"4485\\\">\\n<li data-start=\\\"3802\\\" data-end=\\\"4030\\\">\\n<p data-start=\\\"3804\\\" data-end=\\\"4030\\\">Under normal environmental conditions, either oil-immersed or dry-type transformers may be selected\\u2014for example, in industrial plants, agricultural power stations, or standalone substation rooms within residential communities.<\\\/p>\\n<\\\/li>\\n<li data-start=\\\"4031\\\" data-end=\\\"4137\\\">\\n<p data-start=\\\"4033\\\" data-end=\\\"4137\\\">In multi-story or high-rise buildings, non-flammable or flame-retardant transformers should be used.<\\\/p>\\n<\\\/li>\\n<li data-start=\\\"4138\\\" data-end=\\\"4250\\\">\\n<p data-start=\\\"4140\\\" data-end=\\\"4250\\\">In dusty or corrosive environments, enclosed or sealed transformers are required to ensure safe operation.<\\\/p>\\n<\\\/li>\\n<li data-start=\\\"4251\\\" data-end=\\\"4485\\\">\\n<p data-start=\\\"4253\\\" data-end=\\\"4485\\\">High- and low-voltage equipment without flammable oil and non\\u2013oil-immersed distribution transformers may be installed in the same room. In such cases, transformers should be equipped with an IP2X protective enclosure for safety.<\\\/p>\\n<\\\/li>\\n<\\\/ul>\\n<h5 data-start=\\\"4492\\\" data-end=\\\"4520\\\">Installation Notes<\\\/h5>\\n<p style=\\\"padding-left: 40px;\\\" data-start=\\\"4522\\\" data-end=\\\"4584\\\">Distribution transformers are key components of substations.<\\\/p>\\n<ul data-start=\\\"4585\\\" data-end=\\\"4835\\\">\\n<li data-start=\\\"4585\\\" data-end=\\\"4704\\\">\\n<p data-start=\\\"4587\\\" data-end=\\\"4704\\\">Dry-type transformers without enclosures are directly installed on the ground and protected by safety barriers.<\\\/p>\\n<\\\/li>\\n<li data-start=\\\"4705\\\" data-end=\\\"4835\\\">\\n<p data-start=\\\"4707\\\" data-end=\\\"4835\\\">Dry-type transformers with enclosures can also be directly installed on the ground without additional protective structures.<\\\/p>\\n<\\\/li>\\n<\\\/ul>\\n<h5 data-start=\\\"4842\\\" data-end=\\\"4890\\\">Applications of Dry-Type Transformers<\\\/h5>\\n<p style=\\\"padding-left: 40px;\\\" data-start=\\\"4892\\\" data-end=\\\"5167\\\">Since dry-type transformers contain no oil, they eliminate risks such as fire, explosion, and pollution. As a result, they do not require installation in a dedicated transformer room, enabling both transformers and other electrical equipment to be installed in the same room.<\\\/p>\\n<h5 data-start=\\\"5174\\\" data-end=\\\"5243\\\">Comparison Between Dry-Type and Oil-Immersed Transformers<\\\/h5>\\n<p style=\\\"padding-left: 40px;\\\" data-start=\\\"5245\\\" data-end=\\\"5555\\\">Dry-type and oil-immersed transformers are the two most widely used transformer types. Compared with oil-immersed transformers, dry-type transformers offer superior fire safety, making them suitable for locations with strict fire protection requirements such as hospitals, airports, and railway stations.<\\\/p>\\n<p style=\\\"text-align: left; padding-left: 40px;\\\" data-start=\\\"5557\\\" data-end=\\\"5760\\\">However, dry-type transformers are generally more expensive and have certain environmental requirements\\u2014for example, they should not be installed in overly humid, dusty, or heavily polluted environments.<\\\/p>\\n<p data-start=\\\"2795\\\" 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significant energy-saving performance, with no need for maintenance.<\/li>\n<li>Excellent heat dissipation and strong overload capacity; capacity can be increased under forced-air cooling conditions.<\/li>\n<li>Superior moisture resistance, suitable for high-humidity or harsh environmental conditions.<\/li>\n<li>Can be equipped with a comprehensive temperature monitoring and protection system. The intelligent temperature control unit automatically detects and cyclically displays the operating temperature of each phase winding, and can automatically start\/stop cooling fans while providing alarm and trip functions.<\/li>\n<li>Compact size, lightweight design, minimal footprint, and low installation cost.<\/li>\n<\/ul>\n<h5>Structural Designs<\/h5>\n<ul data-start=\"1586\" data-end=\"2340\">\n<li data-start=\"1586\" data-end=\"1864\">\n<p data-start=\"1589\" data-end=\"1864\">Open Type<br data-start=\"1602\" data-end=\"1605\" \/>A common structure where the transformer body is in direct contact with the atmosphere. Suitable for clean and relatively dry indoor environments (relative humidity \u2264 85% at 20\u00b0C). Cooling methods include natural air cooling and forced-air cooling.<\/p>\n<\/li>\n<li data-start=\"1866\" data-end=\"2149\">\n<p data-start=\"1869\" data-end=\"2149\">Enclosed Type<br data-start=\"1886\" data-end=\"1889\" \/>The transformer body is housed in a sealed enclosure and does not come into direct contact with the atmosphere. Due to poorer sealing and heat dissipation conditions, this type is mainly used in mining applications as an explosion-proof transformer.<\/p>\n<\/li>\n<li data-start=\"2151\" data-end=\"2340\">\n<p data-start=\"2154\" data-end=\"2340\">Cast-Resin Type<br data-start=\"2173\" data-end=\"2176\" \/>Epoxy resin or other resin materials are used for the main insulation. This structure is simple, compact, and typically used for small-capacity transformers.<\/p>\n<\/li>\n<\/ul>\n<h5>Cooling Methods<\/h5>\n<p style=\"padding-left: 40px;\" data-start=\"2435\" data-end=\"2793\">Dry-type transformers are cooled using either natural air cooling (AN) or forced-air cooling (AF).<\/p>\n<p style=\"padding-left: 40px;\" data-start=\"2435\" data-end=\"2793\">Under natural air cooling, the transformer can operate continuously at its rated capacity. With forced-air cooling, the output capacity may be increased by up to 50%, making it suitable for intermittent overload or emergency overload conditions.<\/p>\n<p style=\"padding-left: 40px;\" data-start=\"2795\" data-end=\"3003\">However, due to increased load losses and higher impedance voltage under overload, the transformer enters a non-economic operating state. Therefore, continuous long-term overload operation is not recommended.<\/p>\n<h5 data-start=\"3010\" data-end=\"3049\">Product Selection Guidelines<\/h5>\n<h6 data-start=\"3051\" data-end=\"3110\">\u00a0 \u00a0 \u00a0 1. Selecting Transformers Based on Load Characteristics<\/h6>\n<ul data-start=\"3111\" data-end=\"3749\">\n<li data-start=\"3111\" data-end=\"3428\">\n<p data-start=\"3113\" data-end=\"3428\">When there is a large amount of first- or second-class load, two or more transformers should be installed. If one transformer is disconnected, the remaining units must still be able to supply all Level 1 and Level 2 loads. These important loads should be concentrated as much as possible instead of being scattered.<\/p>\n<\/li>\n<li data-start=\"3429\" data-end=\"3587\">\n<p data-start=\"3431\" data-end=\"3587\">For large seasonal loads, dedicated transformers are recommended, such as air-conditioning chillers or electric heating loads in large commercial buildings.<\/p>\n<\/li>\n<li data-start=\"3588\" data-end=\"3749\">\n<p data-start=\"3590\" data-end=\"3749\">For large concentrated loads, dedicated transformers should also be installed, such as large heating equipment, large X-ray machines, or electric arc furnaces.<\/p>\n<\/li>\n<\/ul>\n<h6 data-start=\"3751\" data-end=\"3801\">\u00a0 \u00a0 \u00a0 2. Environmental and Structural Considerations<\/h6>\n<ul data-start=\"3802\" data-end=\"4485\">\n<li data-start=\"3802\" data-end=\"4030\">\n<p data-start=\"3804\" data-end=\"4030\">Under normal environmental conditions, either oil-immersed or dry-type transformers may be selected\u2014for example, in industrial plants, agricultural power stations, or standalone substation rooms within residential communities.<\/p>\n<\/li>\n<li data-start=\"4031\" data-end=\"4137\">\n<p data-start=\"4033\" data-end=\"4137\">In multi-story or high-rise buildings, non-flammable or flame-retardant transformers should be used.<\/p>\n<\/li>\n<li data-start=\"4138\" data-end=\"4250\">\n<p data-start=\"4140\" data-end=\"4250\">In dusty or corrosive environments, enclosed or sealed transformers are required to ensure safe operation.<\/p>\n<\/li>\n<li data-start=\"4251\" data-end=\"4485\">\n<p data-start=\"4253\" data-end=\"4485\">High- and low-voltage equipment without flammable oil and non\u2013oil-immersed distribution transformers may be installed in the same room. In such cases, transformers should be equipped with an IP2X protective enclosure for safety.<\/p>\n<\/li>\n<\/ul>\n<h5 data-start=\"4492\" data-end=\"4520\">Installation Notes<\/h5>\n<p style=\"padding-left: 40px;\" data-start=\"4522\" data-end=\"4584\">Distribution transformers are key components of substations.<\/p>\n<ul data-start=\"4585\" data-end=\"4835\">\n<li data-start=\"4585\" data-end=\"4704\">\n<p data-start=\"4587\" data-end=\"4704\">Dry-type transformers without enclosures are directly installed on the ground and protected by safety barriers.<\/p>\n<\/li>\n<li data-start=\"4705\" data-end=\"4835\">\n<p data-start=\"4707\" data-end=\"4835\">Dry-type transformers with enclosures can also be directly installed on the ground without additional protective structures.<\/p>\n<\/li>\n<\/ul>\n<h5 data-start=\"4842\" data-end=\"4890\">Applications of Dry-Type Transformers<\/h5>\n<p style=\"padding-left: 40px;\" data-start=\"4892\" data-end=\"5167\">Since dry-type transformers contain no oil, they eliminate risks such as fire, explosion, and pollution. As a result, they do not require installation in a dedicated transformer room, enabling both transformers and other electrical equipment to be installed in the same room.<\/p>\n<h5 data-start=\"5174\" data-end=\"5243\">Comparison Between Dry-Type and Oil-Immersed Transformers<\/h5>\n<p style=\"padding-left: 40px;\" data-start=\"5245\" data-end=\"5555\">Dry-type and oil-immersed transformers are the two most widely used transformer types. Compared with oil-immersed transformers, dry-type transformers offer superior fire safety, making them suitable for locations with strict fire protection requirements such as hospitals, airports, and railway stations.<\/p>\n<p style=\"text-align: left; padding-left: 40px;\" data-start=\"5557\" data-end=\"5760\">However, dry-type transformers are generally more expensive and have certain environmental requirements\u2014for example, they should not be installed in overly humid, dusty, or heavily polluted environments.<\/p>\n<p data-start=\"2795\" data-end=\"3003\">\u00a0<\/p>"},"elements":[],"widgetType":"text-editor"}\\\"]\\t\\t<div class=\\\"elementor-element elementor-element-9e38bbc elementor-widget elementor-widget-image\\\" data-id=\\\"9e38bbc\\\" data-element_type=\\\"widget\\\" data-widget_type=\\\"image.default\\\">\\n\\t\\t\\t\\t\\t\\t\\t\\t\\t\\t\\t\\t\\t\\t\\t<img width=\\\"800\\\" height=\\\"800\\\" src=\\\"https:\\\/\\\/www.ketetransformer.com\\\/wp-content\\\/uploads\\\/2025\\\/08\\\/Dry-type-grounding-transformer-1.jpg\\\" class=\\\"attachment-large size-large wp-image-5708\\\" alt=\\\"\\\" srcset=\\\"https:\\\/\\\/www.ketetransformer.com\\\/wp-content\\\/uploads\\\/2025\\\/08\\\/Dry-type-grounding-transformer-1.jpg 800w, https:\\\/\\\/www.ketetransformer.com\\\/wp-content\\\/uploads\\\/2025\\\/08\\\/Dry-type-grounding-transformer-1-300x300.jpg 300w, https:\\\/\\\/www.ketetransformer.com\\\/wp-content\\\/uploads\\\/2025\\\/08\\\/Dry-type-grounding-transformer-1-150x150.jpg 150w, https:\\\/\\\/www.ketetransformer.com\\\/wp-content\\\/uploads\\\/2025\\\/08\\\/Dry-type-grounding-transformer-1-768x768.jpg 768w, https:\\\/\\\/www.ketetransformer.com\\\/wp-content\\\/uploads\\\/2025\\\/08\\\/Dry-type-grounding-transformer-1-600x600.jpg 600w, https:\\\/\\\/www.ketetransformer.com\\\/wp-content\\\/uploads\\\/2025\\\/08\\\/Dry-type-grounding-transformer-1-100x100.jpg 100w\\\" sizes=\\\"(max-width: 800px) 100vw, 800px\\\" \\\/>\\t\\t\\t\\t\\t\\t\\t\\t\\t\\t\\t\\t\\t\\t\\t<\\\/div>\\n\\t\\t\\t\\t\\t<\\\/div>\\n\\t\\t\\t\\t<\\\/div>\\n\\t\\t\",\"scripts\":[],\"styles\":[]}}"],"_uag_css_file_name":["uag-css-5857.css"]},"uagb_featured_image_src":{"full":["https:\/\/www.ketetransformer.com\/wp-content\/uploads\/2025\/08\/10kv-scbh15-scbh19-dry-type-transformer-4.png",512,472,false],"thumbnail":["https:\/\/www.ketetransformer.com\/wp-content\/uploads\/2025\/08\/10kv-scbh15-scbh19-dry-type-transformer-4-150x150.png",150,150,true],"medium":["https:\/\/www.ketetransformer.com\/wp-content\/uploads\/2025\/08\/10kv-scbh15-scbh19-dry-type-transformer-4-300x277.png",300,277,true],"medium_large":["https:\/\/www.ketetransformer.com\/wp-content\/uploads\/2025\/08\/10kv-scbh15-scbh19-dry-type-transformer-4.png",512,472,false],"large":["https:\/\/www.ketetransformer.com\/wp-content\/uploads\/2025\/08\/10kv-scbh15-scbh19-dry-type-transformer-4.png",512,472,false],"1536x1536":["https:\/\/www.ketetransformer.com\/wp-content\/uploads\/2025\/08\/10kv-scbh15-scbh19-dry-type-transformer-4.png",512,472,false],"2048x2048":["https:\/\/www.ketetransformer.com\/wp-content\/uploads\/2025\/08\/10kv-scbh15-scbh19-dry-type-transformer-4.png",512,472,false],"trp-custom-language-flag":["https:\/\/www.ketetransformer.com\/wp-content\/uploads\/2025\/08\/10kv-scbh15-scbh19-dry-type-transformer-4.png",13,12,false],"woocommerce_thumbnail":["https:\/\/www.ketetransformer.com\/wp-content\/uploads\/2025\/08\/10kv-scbh15-scbh19-dry-type-transformer-4-300x300.png",300,300,true],"woocommerce_single":["https:\/\/www.ketetransformer.com\/wp-content\/uploads\/2025\/08\/10kv-scbh15-scbh19-dry-type-transformer-4.png",512,472,false],"woocommerce_gallery_thumbnail":["https:\/\/www.ketetransformer.com\/wp-content\/uploads\/2025\/08\/10kv-scbh15-scbh19-dry-type-transformer-4-100x100.png",100,100,true]},"uagb_author_info":{"display_name":"lcscmy@163.com","author_link":"https:\/\/www.ketetransformer.com\/fr\/author\/lcscmy163-com\/"},"uagb_comment_info":0,"uagb_excerpt":"With the rapid development of the global economy, dry-type transformers have experienced significant growth worldwide. In the field of distribution transformers in particular, the market share of dry-type units has been increasing year by year. In many countries, dry-type transformers now account for 40\u201350% of all distribution transformers. Table of Contents Structural Features of Dry-Type\u2026","_links":{"self":[{"href":"https:\/\/www.ketetransformer.com\/fr\/wp-json\/wp\/v2\/posts\/5857","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.ketetransformer.com\/fr\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.ketetransformer.com\/fr\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.ketetransformer.com\/fr\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.ketetransformer.com\/fr\/wp-json\/wp\/v2\/comments?post=5857"}],"version-history":[{"count":0,"href":"https:\/\/www.ketetransformer.com\/fr\/wp-json\/wp\/v2\/posts\/5857\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.ketetransformer.com\/fr\/wp-json\/wp\/v2\/media\/5781"}],"wp:attachment":[{"href":"https:\/\/www.ketetransformer.com\/fr\/wp-json\/wp\/v2\/media?parent=5857"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.ketetransformer.com\/fr\/wp-json\/wp\/v2\/categories?post=5857"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.ketetransformer.com\/fr\/wp-json\/wp\/v2\/tags?post=5857"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}