{"id":5867,"date":"2025-11-26T06:03:02","date_gmt":"2025-11-26T06:03:02","guid":{"rendered":"https:\/\/www.ketetransformer.com\/?p=5867"},"modified":"2025-11-26T06:22:18","modified_gmt":"2025-11-26T06:22:18","slug":"what-is-a-transformer-transformer-models-and-fundamentals","status":"publish","type":"post","link":"https:\/\/www.ketetransformer.com\/ar\/what-is-a-transformer-transformer-models-and-fundamentals\/","title":{"rendered":"\u0645\u0627 \u0647\u0648 \u0627\u0644\u0645\u062d\u0648\u0644\u061f \u0646\u0645\u0627\u0630\u062c \u0627\u0644\u0645\u062d\u0648\u0644\u0627\u062a \u0648\u0623\u0633\u0627\u0633\u064a\u0627\u062a\u0647\u0627"},"content":{"rendered":"\t\t<div data-elementor-type=\"wp-post\" data-elementor-id=\"5867\" class=\"elementor elementor-5867\" 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><span data-font-family=\"\u5fae\u8f6f\u96c5\u9ed1\">A transformer is a device used to convert AC voltage, current, and impedance. It operates based on the principle of electromagnetic induction and is a static electrical apparatus. Transformers come in many types, including pulse transformers, intermediate-frequency transformers, trigger transformers, shielding transformers, and more.<\/span><\/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 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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=\"750\" height=\"750\" src=\"https:\/\/www.ketetransformer.com\/wp-content\/uploads\/2025\/09\/dry-type-transformers-30.webp\" class=\"attachment-large size-large wp-image-3572\" alt=\"\" srcset=\"https:\/\/www.ketetransformer.com\/wp-content\/uploads\/2025\/09\/dry-type-transformers-30.webp 750w, https:\/\/www.ketetransformer.com\/wp-content\/uploads\/2025\/09\/dry-type-transformers-30-300x300.webp 300w, https:\/\/www.ketetransformer.com\/wp-content\/uploads\/2025\/09\/dry-type-transformers-30-150x150.webp 150w, https:\/\/www.ketetransformer.com\/wp-content\/uploads\/2025\/09\/dry-type-transformers-30-600x600.webp 600w, https:\/\/www.ketetransformer.com\/wp-content\/uploads\/2025\/09\/dry-type-transformers-30-100x100.webp 100w\" sizes=\"(max-width: 750px) 100vw, 750px\" \/>\t\t\t\t\t\t\t\t\t\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 style=\"padding-left: 40px;\"><span data-font-family=\"\u5fae\u8f6f\u96c5\u9ed1\"> Definition of a Transformer<\/span><\/h5><p style=\"padding-left: 40px;\"><span data-font-family=\"\u5fae\u8f6f\u96c5\u9ed1\">A transformer transfers electrical energy or signals from one circuit to another using the principle of electromagnetic induction. It is an essential component for electrical power conversion or signal transmission.<\/span><\/p><p style=\"padding-left: 40px;\"><span data-font-family=\"\u5fae\u8f6f\u96c5\u9ed1\">A transformer consists of:<\/span><\/p><ul><li style=\"list-style-type: none;\"><ul><li><span data-font-family=\"\u5fae\u8f6f\u96c5\u9ed1\">Core (iron or magnetic core)<\/span><\/li><li><span data-font-family=\"\u5fae\u8f6f\u96c5\u9ed1\">Windings (two or more)<\/span><\/li><\/ul><\/li><\/ul><p style=\"padding-left: 40px;\"><span data-font-family=\"\u5fae\u8f6f\u96c5\u9ed1\">The winding connected to the power supply is the primary winding, and the others are secondary windings.<\/span><\/p><h5 style=\"padding-left: 40px;\"><span data-font-family=\"\u5fae\u8f6f\u96c5\u9ed1\">Working Principle of a Transformer<\/span><\/h5><p style=\"padding-left: 40px;\"><span data-font-family=\"\u5fae\u8f6f\u96c5\u9ed1\">A simple single-phase transformer consists of two conductive windings. When alternating current or pulsed DC flows through one winding, it generates a varying magnetic field, which induces a voltage in the second winding according to the principle of mutual induction.<\/span><\/p><p style=\"padding-left: 40px;\"><span data-font-family=\"\u5fae\u8f6f\u96c5\u9ed1\">The voltage ratio between primary and secondary windings is proportional to their turns ratio:<\/span><\/p><p style=\"padding-left: 40px;\"><span data-font-family=\"\u5fae\u8f6f\u96c5\u9ed1\"><strong>VsVp=NsNp\\frac{V_s}{V_p} = \\frac{N_s}{N_p}Vp Vs =Np<\/strong> Ns Similarly, the current ratio is inversely proportional to the turns ratio.<\/span><\/p><p style=\"padding-left: 40px;\"><span data-font-family=\"\u5fae\u8f6f\u96c5\u9ed1\">While transformers can step up or step down voltage, they do not amplify power. Excluding losses, the power on both sides is approximately equal:<\/span><\/p><p style=\"padding-left: 40px;\"><strong>VpIp\u2248VsIsV_p I_p \\approx V_s I_sVp Ip \u2248Vs Is<\/strong><\/p><h5 style=\"padding-left: 40px;\"><span data-font-family=\"\u5fae\u8f6f\u96c5\u9ed1\">Functions of a Transformer<\/span><\/h5><p style=\"padding-left: 40px;\"><span data-font-family=\"\u5fae\u8f6f\u96c5\u9ed1\">Transformers play a critical role in power transmission:<\/span><\/p><ul><li style=\"list-style-type: none;\"><ul><li><span data-font-family=\"\u5fae\u8f6f\u96c5\u9ed1\">For long-distance transmission, higher voltages reduce current and drastically lower conductor size and line cost.<\/span><\/li><li><span data-font-family=\"\u5fae\u8f6f\u96c5\u9ed1\">Step-up transformers raise the voltage for transmission.<\/span><\/li><li><span data-font-family=\"\u5fae\u8f6f\u96c5\u9ed1\">Step-down transformers reduce voltage for industrial, commercial, and household use.<\/span><\/li><\/ul><\/li><\/ul><p style=\"padding-left: 40px;\"><span data-font-family=\"\u5fae\u8f6f\u96c5\u9ed1\">Transformers are therefore essential components in any electrical power system.<\/span><\/p><h5 style=\"padding-left: 40px;\"><span data-font-family=\"\u5fae\u8f6f\u96c5\u9ed1\">Transformer Model Explanation<\/span><\/h5><p style=\"text-align: left; padding-left: 40px;\"><span data-font-family=\"\u5fae\u8f6f\u96c5\u9ed1\">Transformer models vary widely. Different types have different naming rules. Below are typical examples:<\/span><\/p><p style=\"text-align: left; padding-left: 40px;\"><span data-font-family=\"\u5fae\u8f6f\u96c5\u9ed1\">Dry-Type Transformer Example<\/span><\/p><p style=\"text-align: left; padding-left: 40px;\"><span data-font-family=\"\u5fae\u8f6f\u96c5\u9ed1\">SCB10-1000kVA \/ 10kV \/ 0.4kV<\/span><\/p><p style=\"text-align: left; padding-left: 40px;\"><span data-font-family=\"\u5fae\u8f6f\u96c5\u9ed1\">Meaning:<\/span><\/p><ul><li style=\"list-style-type: none;\"><ul style=\"text-align: left;\"><li><span data-font-family=\"\u5fae\u8f6f\u96c5\u9ed1\">S \u2013 Three-phase<\/span><\/li><li><span data-font-family=\"\u5fae\u8f6f\u96c5\u9ed1\">C \u2013 Cast resin dry type<\/span><\/li><li><span data-font-family=\"\u5fae\u8f6f\u96c5\u9ed1\">B \u2013 Foil winding<\/span><ul><li><span data-font-family=\"\u5fae\u8f6f\u96c5\u9ed1\">R = wire-wound winding<\/span><\/li><li><span data-font-family=\"\u5fae\u8f6f\u96c5\u9ed1\">L = aluminum winding<\/span><\/li><li><span data-font-family=\"\u5fae\u8f6f\u96c5\u9ed1\">Z = on-load tap changer (copper is default)<\/span><\/li><\/ul><\/li><li><span data-font-family=\"\u5fae\u8f6f\u96c5\u9ed1\">10 \u2013 Design sequence number<\/span><\/li><li><span data-font-family=\"\u5fae\u8f6f\u96c5\u9ed1\">1000 kVA \u2013 Rated capacity<\/span><\/li><li><span data-font-family=\"\u5fae\u8f6f\u96c5\u9ed1\">10 kV \u2013 Primary voltage<\/span><\/li><li><span data-font-family=\"\u5fae\u8f6f\u96c5\u9ed1\">4 kV \u2013 Secondary voltage<\/span><\/li><\/ul><\/li><\/ul><p style=\"text-align: left; padding-left: 40px;\"><span data-font-family=\"\u5fae\u8f6f\u96c5\u9ed1\">Power Transformer Example<\/span><\/p><p style=\"text-align: left; padding-left: 40px;\"><span data-font-family=\"\u5fae\u8f6f\u96c5\u9ed1\">SFSZ9-31500\/110<\/span><\/p><p style=\"text-align: left; padding-left: 40px;\"><span data-font-family=\"\u5fae\u8f6f\u96c5\u9ed1\">Meaning:<\/span><\/p><ul><li style=\"list-style-type: none;\"><ul><li style=\"text-align: left;\"><span data-font-family=\"\u5fae\u8f6f\u96c5\u9ed1\">S \u2013 Three-phase<\/span><\/li><li style=\"text-align: left;\"><span data-font-family=\"\u5fae\u8f6f\u96c5\u9ed1\">F \u2013 Forced-air cooling<\/span><\/li><li style=\"text-align: left;\"><span data-font-family=\"\u5fae\u8f6f\u96c5\u9ed1\">S \u2013 Three-winding<\/span><\/li><li style=\"text-align: left;\"><span data-font-family=\"\u5fae\u8f6f\u96c5\u9ed1\">Z \u2013 On-load tap changer<\/span><\/li><li style=\"text-align: left;\"><span data-font-family=\"\u5fae\u8f6f\u96c5\u9ed1\">9 \u2013 Design sequence<\/span><\/li><li style=\"text-align: left;\"><span data-font-family=\"\u5fae\u8f6f\u96c5\u9ed1\">31500 \u2013 Rated capacity (kVA)<\/span><\/li><li style=\"text-align: left;\"><span data-font-family=\"\u5fae\u8f6f\u96c5\u9ed1\">110 \u2013 Primary rated voltage (kV)<\/span><\/li><\/ul><\/li><\/ul>\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>A transformer is a device used to convert AC voltage, current, and impedance. It operates based on the principle of electromagnetic induction and is a static electrical apparatus. Transformers come in many types, including pulse transformers, intermediate-frequency transformers, trigger transformers, shielding transformers, and more. Table of Contents Definition of a Transformer A transformer transfers electrical 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It operates based on the principle of electromagnetic induction and is a static electrical apparatus. Transformers come in many types, including pulse transformers, intermediate-frequency transformers, trigger transformers, shielding transformers, and more.<\\\/span><\\\/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\":\"9e38bbc\",\"elType\":\"widget\",\"settings\":{\"image\":{\"url\":\"https:\\\/\\\/www.ketetransformer.com\\\/wp-content\\\/uploads\\\/2025\\\/09\\\/dry-type-transformers-30.webp\",\"id\":3572,\"size\":\"\",\"alt\":\"\",\"source\":\"library\"}},\"elements\":[],\"widgetType\":\"image\"},{\"id\":\"9736800\",\"elType\":\"widget\",\"settings\":{\"editor\":\"<h5 style=\\\"padding-left: 40px;\\\"><span data-font-family=\\\"\\u5fae\\u8f6f\\u96c5\\u9ed1\\\"> Definition of a Transformer<\\\/span><\\\/h5><p style=\\\"padding-left: 40px;\\\"><span data-font-family=\\\"\\u5fae\\u8f6f\\u96c5\\u9ed1\\\">A transformer transfers electrical energy or signals from one circuit to another using the principle of electromagnetic induction. It is an essential component for electrical power conversion or signal transmission.<\\\/span><\\\/p><p style=\\\"padding-left: 40px;\\\"><span data-font-family=\\\"\\u5fae\\u8f6f\\u96c5\\u9ed1\\\">A transformer consists of:<\\\/span><\\\/p><ul><li style=\\\"list-style-type: none;\\\"><ul><li><span data-font-family=\\\"\\u5fae\\u8f6f\\u96c5\\u9ed1\\\">Core (iron or magnetic core)<\\\/span><\\\/li><li><span data-font-family=\\\"\\u5fae\\u8f6f\\u96c5\\u9ed1\\\">Windings (two or more)<\\\/span><\\\/li><\\\/ul><\\\/li><\\\/ul><p style=\\\"padding-left: 40px;\\\"><span data-font-family=\\\"\\u5fae\\u8f6f\\u96c5\\u9ed1\\\">The winding connected to the power supply is the primary winding, and the others are secondary windings.<\\\/span><\\\/p><h5 style=\\\"padding-left: 40px;\\\"><span data-font-family=\\\"\\u5fae\\u8f6f\\u96c5\\u9ed1\\\">Working Principle of a Transformer<\\\/span><\\\/h5><p style=\\\"padding-left: 40px;\\\"><span data-font-family=\\\"\\u5fae\\u8f6f\\u96c5\\u9ed1\\\">A simple single-phase transformer consists of two conductive windings. When alternating current or pulsed DC flows through one winding, it generates a varying magnetic field, which induces a voltage in the second winding according to the principle of mutual induction.<\\\/span><\\\/p><p style=\\\"padding-left: 40px;\\\"><span data-font-family=\\\"\\u5fae\\u8f6f\\u96c5\\u9ed1\\\">The voltage ratio between primary and secondary windings is proportional to their turns ratio:<\\\/span><\\\/p><p style=\\\"padding-left: 40px;\\\"><span data-font-family=\\\"\\u5fae\\u8f6f\\u96c5\\u9ed1\\\"><strong>VsVp=NsNp\\\\frac{V_s}{V_p} = \\\\frac{N_s}{N_p}Vp Vs =Np<\\\/strong> Ns Similarly, the current ratio is inversely proportional to the turns ratio.<\\\/span><\\\/p><p style=\\\"padding-left: 40px;\\\"><span data-font-family=\\\"\\u5fae\\u8f6f\\u96c5\\u9ed1\\\">While transformers can step up or step down voltage, they do not amplify power. Excluding losses, the power on both sides is approximately equal:<\\\/span><\\\/p><p style=\\\"padding-left: 40px;\\\"><strong>VpIp\\u2248VsIsV_p I_p \\\\approx V_s I_sVp Ip \\u2248Vs Is<\\\/strong><\\\/p><h5 style=\\\"padding-left: 40px;\\\"><span data-font-family=\\\"\\u5fae\\u8f6f\\u96c5\\u9ed1\\\">Functions of a Transformer<\\\/span><\\\/h5><p style=\\\"padding-left: 40px;\\\"><span data-font-family=\\\"\\u5fae\\u8f6f\\u96c5\\u9ed1\\\">Transformers play a critical role in power transmission:<\\\/span><\\\/p><ul><li style=\\\"list-style-type: none;\\\"><ul><li><span data-font-family=\\\"\\u5fae\\u8f6f\\u96c5\\u9ed1\\\">For long-distance transmission, higher voltages reduce current and drastically lower conductor size and line cost.<\\\/span><\\\/li><li><span data-font-family=\\\"\\u5fae\\u8f6f\\u96c5\\u9ed1\\\">Step-up transformers raise the voltage for transmission.<\\\/span><\\\/li><li><span data-font-family=\\\"\\u5fae\\u8f6f\\u96c5\\u9ed1\\\">Step-down transformers reduce voltage for industrial, commercial, and household use.<\\\/span><\\\/li><\\\/ul><\\\/li><\\\/ul><p style=\\\"padding-left: 40px;\\\"><span data-font-family=\\\"\\u5fae\\u8f6f\\u96c5\\u9ed1\\\">Transformers are therefore essential components in any electrical power system.<\\\/span><\\\/p><h5 style=\\\"padding-left: 40px;\\\"><span data-font-family=\\\"\\u5fae\\u8f6f\\u96c5\\u9ed1\\\">Transformer Model Explanation<\\\/span><\\\/h5><p style=\\\"text-align: left; padding-left: 40px;\\\"><span data-font-family=\\\"\\u5fae\\u8f6f\\u96c5\\u9ed1\\\">Transformer models vary widely. Different types have different naming rules. Below are typical examples:<\\\/span><\\\/p><p style=\\\"text-align: left; padding-left: 40px;\\\"><span data-font-family=\\\"\\u5fae\\u8f6f\\u96c5\\u9ed1\\\">Dry-Type Transformer Example<\\\/span><\\\/p><p style=\\\"text-align: left; padding-left: 40px;\\\"><span data-font-family=\\\"\\u5fae\\u8f6f\\u96c5\\u9ed1\\\">SCB10-1000kVA \\\/ 10kV \\\/ 0.4kV<\\\/span><\\\/p><p style=\\\"text-align: left; padding-left: 40px;\\\"><span data-font-family=\\\"\\u5fae\\u8f6f\\u96c5\\u9ed1\\\">Meaning:<\\\/span><\\\/p><ul><li style=\\\"list-style-type: none;\\\"><ul style=\\\"text-align: left;\\\"><li><span data-font-family=\\\"\\u5fae\\u8f6f\\u96c5\\u9ed1\\\">S \\u2013 Three-phase<\\\/span><\\\/li><li><span data-font-family=\\\"\\u5fae\\u8f6f\\u96c5\\u9ed1\\\">C \\u2013 Cast resin dry type<\\\/span><\\\/li><li><span data-font-family=\\\"\\u5fae\\u8f6f\\u96c5\\u9ed1\\\">B \\u2013 Foil winding<\\\/span><ul><li><span data-font-family=\\\"\\u5fae\\u8f6f\\u96c5\\u9ed1\\\">R = wire-wound winding<\\\/span><\\\/li><li><span data-font-family=\\\"\\u5fae\\u8f6f\\u96c5\\u9ed1\\\">L = aluminum winding<\\\/span><\\\/li><li><span data-font-family=\\\"\\u5fae\\u8f6f\\u96c5\\u9ed1\\\">Z = on-load tap changer (copper is default)<\\\/span><\\\/li><\\\/ul><\\\/li><li><span data-font-family=\\\"\\u5fae\\u8f6f\\u96c5\\u9ed1\\\">10 \\u2013 Design sequence number<\\\/span><\\\/li><li><span data-font-family=\\\"\\u5fae\\u8f6f\\u96c5\\u9ed1\\\">1000 kVA \\u2013 Rated capacity<\\\/span><\\\/li><li><span data-font-family=\\\"\\u5fae\\u8f6f\\u96c5\\u9ed1\\\">10 kV \\u2013 Primary voltage<\\\/span><\\\/li><li><span data-font-family=\\\"\\u5fae\\u8f6f\\u96c5\\u9ed1\\\">4 kV \\u2013 Secondary voltage<\\\/span><\\\/li><\\\/ul><\\\/li><\\\/ul><p style=\\\"text-align: left; padding-left: 40px;\\\"><span data-font-family=\\\"\\u5fae\\u8f6f\\u96c5\\u9ed1\\\">Power Transformer Example<\\\/span><\\\/p><p style=\\\"text-align: left; padding-left: 40px;\\\"><span data-font-family=\\\"\\u5fae\\u8f6f\\u96c5\\u9ed1\\\">SFSZ9-31500\\\/110<\\\/span><\\\/p><p style=\\\"text-align: left; padding-left: 40px;\\\"><span data-font-family=\\\"\\u5fae\\u8f6f\\u96c5\\u9ed1\\\">Meaning:<\\\/span><\\\/p><ul><li style=\\\"list-style-type: none;\\\"><ul><li style=\\\"text-align: left;\\\"><span data-font-family=\\\"\\u5fae\\u8f6f\\u96c5\\u9ed1\\\">S \\u2013 Three-phase<\\\/span><\\\/li><li style=\\\"text-align: left;\\\"><span data-font-family=\\\"\\u5fae\\u8f6f\\u96c5\\u9ed1\\\">F \\u2013 Forced-air cooling<\\\/span><\\\/li><li style=\\\"text-align: left;\\\"><span data-font-family=\\\"\\u5fae\\u8f6f\\u96c5\\u9ed1\\\">S \\u2013 Three-winding<\\\/span><\\\/li><li style=\\\"text-align: left;\\\"><span data-font-family=\\\"\\u5fae\\u8f6f\\u96c5\\u9ed1\\\">Z \\u2013 On-load tap changer<\\\/span><\\\/li><li style=\\\"text-align: left;\\\"><span data-font-family=\\\"\\u5fae\\u8f6f\\u96c5\\u9ed1\\\">9 \\u2013 Design sequence<\\\/span><\\\/li><li style=\\\"text-align: left;\\\"><span data-font-family=\\\"\\u5fae\\u8f6f\\u96c5\\u9ed1\\\">31500 \\u2013 Rated capacity (kVA)<\\\/span><\\\/li><li style=\\\"text-align: left;\\\"><span data-font-family=\\\"\\u5fae\\u8f6f\\u96c5\\u9ed1\\\">110 \\u2013 Primary rated voltage (kV)<\\\/span><\\\/li><\\\/ul><\\\/li><\\\/ul>\"},\"elements\":[],\"widgetType\":\"text-editor\"}],\"isInner\":false}]"],"_elementor_conditions":["a:0:{}"],"_edit_last":["1"],"_elementor_version":["3.31.1"],"_elementor_pro_version":["3.31.0"],"_wp_page_template":["default"],"rank_math_seo_score":["63"],"_elementor_page_settings":["a:1:{s:18:\"eael_ext_toc_title\";s:17:\"Table of 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srcset=\\\"https:\\\/\\\/www.ketetransformer.com\\\/wp-content\\\/uploads\\\/2025\\\/09\\\/dry-type-transformers-30.webp 750w, https:\\\/\\\/www.ketetransformer.com\\\/wp-content\\\/uploads\\\/2025\\\/09\\\/dry-type-transformers-30-300x300.webp 300w, https:\\\/\\\/www.ketetransformer.com\\\/wp-content\\\/uploads\\\/2025\\\/09\\\/dry-type-transformers-30-150x150.webp 150w, https:\\\/\\\/www.ketetransformer.com\\\/wp-content\\\/uploads\\\/2025\\\/09\\\/dry-type-transformers-30-600x600.webp 600w, https:\\\/\\\/www.ketetransformer.com\\\/wp-content\\\/uploads\\\/2025\\\/09\\\/dry-type-transformers-30-100x100.webp 100w\\\" sizes=\\\"(max-width: 750px) 100vw, 750px\\\" \\\/>\\t\\t\\t\\t\\t\\t\\t\\t\\t\\t\\t\\t\\t\\t\\t<\\\/div>\\n\\t\\t[elementor-element k=\\\"43aca594a86d0bbe94de5159700c1e94\\\" data=\\\"{"id":"9736800","elType":"widget","settings":{"editor":"<h5 style=\"padding-left: 40px;\"><span data-font-family=\"\u5fae\u8f6f\u96c5\u9ed1\"> Definition of a Transformer<\/span><\/h5><p style=\"padding-left: 40px;\"><span data-font-family=\"\u5fae\u8f6f\u96c5\u9ed1\">A transformer transfers electrical energy or signals from one circuit to another using the principle of electromagnetic induction. It is an essential component for electrical power conversion or signal transmission.<\/span><\/p><p style=\"padding-left: 40px;\"><span data-font-family=\"\u5fae\u8f6f\u96c5\u9ed1\">A transformer consists of:<\/span><\/p><ul><li style=\"list-style-type: none;\"><ul><li><span data-font-family=\"\u5fae\u8f6f\u96c5\u9ed1\">Core (iron or magnetic core)<\/span><\/li><li><span data-font-family=\"\u5fae\u8f6f\u96c5\u9ed1\">Windings (two or more)<\/span><\/li><\/ul><\/li><\/ul><p style=\"padding-left: 40px;\"><span data-font-family=\"\u5fae\u8f6f\u96c5\u9ed1\">The winding connected to the power supply is the primary winding, and the others are secondary windings.<\/span><\/p><h5 style=\"padding-left: 40px;\"><span data-font-family=\"\u5fae\u8f6f\u96c5\u9ed1\">Working Principle of a Transformer<\/span><\/h5><p style=\"padding-left: 40px;\"><span data-font-family=\"\u5fae\u8f6f\u96c5\u9ed1\">A simple single-phase transformer consists of two conductive windings. When alternating current or pulsed DC flows through one winding, it generates a varying magnetic field, which induces a voltage in the second winding according to the principle of mutual induction.<\/span><\/p><p style=\"padding-left: 40px;\"><span data-font-family=\"\u5fae\u8f6f\u96c5\u9ed1\">The voltage ratio between primary and secondary windings is proportional to their turns ratio:<\/span><\/p><p style=\"padding-left: 40px;\"><span data-font-family=\"\u5fae\u8f6f\u96c5\u9ed1\"><strong>VsVp=NsNp\\frac{V_s}{V_p} = \\frac{N_s}{N_p}Vp Vs =Np<\/strong> Ns Similarly, the current ratio is inversely proportional to the turns ratio.<\/span><\/p><p style=\"padding-left: 40px;\"><span data-font-family=\"\u5fae\u8f6f\u96c5\u9ed1\">While transformers can step up or step down voltage, they do not amplify power. Excluding losses, the power on both sides is approximately equal:<\/span><\/p><p style=\"padding-left: 40px;\"><strong>VpIp\u2248VsIsV_p I_p \\approx V_s I_sVp Ip \u2248Vs Is<\/strong><\/p><h5 style=\"padding-left: 40px;\"><span data-font-family=\"\u5fae\u8f6f\u96c5\u9ed1\">Functions of a Transformer<\/span><\/h5><p style=\"padding-left: 40px;\"><span data-font-family=\"\u5fae\u8f6f\u96c5\u9ed1\">Transformers play a critical role in power transmission:<\/span><\/p><ul><li style=\"list-style-type: none;\"><ul><li><span data-font-family=\"\u5fae\u8f6f\u96c5\u9ed1\">For long-distance transmission, higher voltages reduce current and drastically lower conductor size and line cost.<\/span><\/li><li><span data-font-family=\"\u5fae\u8f6f\u96c5\u9ed1\">Step-up transformers raise the voltage for transmission.<\/span><\/li><li><span data-font-family=\"\u5fae\u8f6f\u96c5\u9ed1\">Step-down transformers reduce voltage for industrial, commercial, and household use.<\/span><\/li><\/ul><\/li><\/ul><p style=\"padding-left: 40px;\"><span data-font-family=\"\u5fae\u8f6f\u96c5\u9ed1\">Transformers are therefore essential components in any electrical power system.<\/span><\/p><h5 style=\"padding-left: 40px;\"><span data-font-family=\"\u5fae\u8f6f\u96c5\u9ed1\">Transformer Model Explanation<\/span><\/h5><p style=\"text-align: left; padding-left: 40px;\"><span data-font-family=\"\u5fae\u8f6f\u96c5\u9ed1\">Transformer models vary widely. Different types have different naming rules. Below are typical examples:<\/span><\/p><p style=\"text-align: left; padding-left: 40px;\"><span data-font-family=\"\u5fae\u8f6f\u96c5\u9ed1\">Dry-Type Transformer Example<\/span><\/p><p style=\"text-align: left; padding-left: 40px;\"><span data-font-family=\"\u5fae\u8f6f\u96c5\u9ed1\">SCB10-1000kVA \/ 10kV \/ 0.4kV<\/span><\/p><p style=\"text-align: left; padding-left: 40px;\"><span data-font-family=\"\u5fae\u8f6f\u96c5\u9ed1\">Meaning:<\/span><\/p><ul><li style=\"list-style-type: none;\"><ul style=\"text-align: left;\"><li><span data-font-family=\"\u5fae\u8f6f\u96c5\u9ed1\">S \u2013 Three-phase<\/span><\/li><li><span data-font-family=\"\u5fae\u8f6f\u96c5\u9ed1\">C \u2013 Cast resin dry type<\/span><\/li><li><span data-font-family=\"\u5fae\u8f6f\u96c5\u9ed1\">B \u2013 Foil winding<\/span><ul><li><span data-font-family=\"\u5fae\u8f6f\u96c5\u9ed1\">R = wire-wound winding<\/span><\/li><li><span data-font-family=\"\u5fae\u8f6f\u96c5\u9ed1\">L = aluminum winding<\/span><\/li><li><span data-font-family=\"\u5fae\u8f6f\u96c5\u9ed1\">Z = on-load tap changer (copper is default)<\/span><\/li><\/ul><\/li><li><span data-font-family=\"\u5fae\u8f6f\u96c5\u9ed1\">10 \u2013 Design sequence number<\/span><\/li><li><span data-font-family=\"\u5fae\u8f6f\u96c5\u9ed1\">1000 kVA \u2013 Rated capacity<\/span><\/li><li><span data-font-family=\"\u5fae\u8f6f\u96c5\u9ed1\">10 kV \u2013 Primary voltage<\/span><\/li><li><span data-font-family=\"\u5fae\u8f6f\u96c5\u9ed1\">4 kV \u2013 Secondary voltage<\/span><\/li><\/ul><\/li><\/ul><p style=\"text-align: left; padding-left: 40px;\"><span data-font-family=\"\u5fae\u8f6f\u96c5\u9ed1\">Power Transformer Example<\/span><\/p><p style=\"text-align: left; padding-left: 40px;\"><span data-font-family=\"\u5fae\u8f6f\u96c5\u9ed1\">SFSZ9-31500\/110<\/span><\/p><p style=\"text-align: left; padding-left: 40px;\"><span data-font-family=\"\u5fae\u8f6f\u96c5\u9ed1\">Meaning:<\/span><\/p><ul><li style=\"list-style-type: none;\"><ul><li style=\"text-align: left;\"><span data-font-family=\"\u5fae\u8f6f\u96c5\u9ed1\">S \u2013 Three-phase<\/span><\/li><li style=\"text-align: left;\"><span data-font-family=\"\u5fae\u8f6f\u96c5\u9ed1\">F \u2013 Forced-air cooling<\/span><\/li><li style=\"text-align: left;\"><span data-font-family=\"\u5fae\u8f6f\u96c5\u9ed1\">S \u2013 Three-winding<\/span><\/li><li style=\"text-align: left;\"><span data-font-family=\"\u5fae\u8f6f\u96c5\u9ed1\">Z \u2013 On-load tap changer<\/span><\/li><li style=\"text-align: left;\"><span data-font-family=\"\u5fae\u8f6f\u96c5\u9ed1\">9 \u2013 Design sequence<\/span><\/li><li style=\"text-align: left;\"><span data-font-family=\"\u5fae\u8f6f\u96c5\u9ed1\">31500 \u2013 Rated capacity (kVA)<\/span><\/li><li style=\"text-align: left;\"><span data-font-family=\"\u5fae\u8f6f\u96c5\u9ed1\">110 \u2013 Primary rated voltage (kV)<\/span><\/li><\/ul><\/li><\/ul>"},"elements":[],"widgetType":"text-editor"}\\\"]\\t\\t\\t<\\\/div>\\n\\t\\t\\t\\t<\\\/div>\\n\\t\\t\",\"scripts\":[],\"styles\":[]}}"],"_uag_css_file_name":["uag-css-5867.css"]},"uagb_featured_image_src":{"full":["https:\/\/www.ketetransformer.com\/wp-content\/uploads\/2025\/09\/dry-type-transformers-74.webp",750,750,false],"thumbnail":["https:\/\/www.ketetransformer.com\/wp-content\/uploads\/2025\/09\/dry-type-transformers-74-150x150.webp",150,150,true],"medium":["https:\/\/www.ketetransformer.com\/wp-content\/uploads\/2025\/09\/dry-type-transformers-74-300x300.webp",300,300,true],"medium_large":["https:\/\/www.ketetransformer.com\/wp-content\/uploads\/2025\/09\/dry-type-transformers-74.webp",750,750,false],"large":["https:\/\/www.ketetransformer.com\/wp-content\/uploads\/2025\/09\/dry-type-transformers-74.webp",750,750,false],"1536x1536":["https:\/\/www.ketetransformer.com\/wp-content\/uploads\/2025\/09\/dry-type-transformers-74.webp",750,750,false],"2048x2048":["https:\/\/www.ketetransformer.com\/wp-content\/uploads\/2025\/09\/dry-type-transformers-74.webp",750,750,false],"trp-custom-language-flag":["https:\/\/www.ketetransformer.com\/wp-content\/uploads\/2025\/09\/dry-type-transformers-74.webp",12,12,false],"woocommerce_thumbnail":["https:\/\/www.ketetransformer.com\/wp-content\/uploads\/2025\/09\/dry-type-transformers-74-300x300.webp",300,300,true],"woocommerce_single":["https:\/\/www.ketetransformer.com\/wp-content\/uploads\/2025\/09\/dry-type-transformers-74-600x600.webp",600,600,true],"woocommerce_gallery_thumbnail":["https:\/\/www.ketetransformer.com\/wp-content\/uploads\/2025\/09\/dry-type-transformers-74-100x100.webp",100,100,true]},"uagb_author_info":{"display_name":"lcscmy@163.com","author_link":"https:\/\/www.ketetransformer.com\/ar\/author\/lcscmy163-com\/"},"uagb_comment_info":0,"uagb_excerpt":"A transformer is a device used to convert AC voltage, current, and impedance. It operates based on the principle of electromagnetic induction and is a static electrical apparatus. Transformers come in many types, including pulse transformers, intermediate-frequency transformers, trigger transformers, shielding transformers, and more. Table of Contents Definition of a Transformer A transformer transfers electrical&hellip;","_links":{"self":[{"href":"https:\/\/www.ketetransformer.com\/ar\/wp-json\/wp\/v2\/posts\/5867","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.ketetransformer.com\/ar\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.ketetransformer.com\/ar\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.ketetransformer.com\/ar\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.ketetransformer.com\/ar\/wp-json\/wp\/v2\/comments?post=5867"}],"version-history":[{"count":0,"href":"https:\/\/www.ketetransformer.com\/ar\/wp-json\/wp\/v2\/posts\/5867\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.ketetransformer.com\/ar\/wp-json\/wp\/v2\/media\/3598"}],"wp:attachment":[{"href":"https:\/\/www.ketetransformer.com\/ar\/wp-json\/wp\/v2\/media?parent=5867"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.ketetransformer.com\/ar\/wp-json\/wp\/v2\/categories?post=5867"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.ketetransformer.com\/ar\/wp-json\/wp\/v2\/tags?post=5867"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}