{"id":1330,"date":"2026-07-22T05:33:12","date_gmt":"2026-07-22T05:33:12","guid":{"rendered":"https:\/\/lstransformer.com\/what-are-the-voltage-levels-of-transmission-and-transformation-lines-in-china-how-can-we-distinguish-between-step-up-and-step-down-transformers\/"},"modified":"2026-09-30T02:51:52","modified_gmt":"2026-09-30T02:51:52","slug":"what-are-the-voltage-levels-of-transmission-and-transformation-lines-in-china-how-can-we-distinguish-between-step-up-and-step-down-transformers","status":"publish","type":"post","link":"https:\/\/www.lstransformer.com\/es\/what-are-the-voltage-levels-of-transmission-and-transformation-lines-in-china-how-can-we-distinguish-between-step-up-and-step-down-transformers\/","title":{"rendered":"What are the voltage levels of transmission and transformation lines in China? How can we distinguish between step-up and step-down transformers?"},"content":{"rendered":"

What are the voltage levels of transmission and transformation lines in China? How can we distinguish between step-up and step-down transformers?<\/h1>\n

In China, the voltage levels of transmission and transformation lines include the following values (kV): 0.38, 3, 6, 10, 15 (20), 35, 60, 110, 220, 330, 500. The voltage at the beginning (power source end) of the line is higher relative to these values. In voltage levels of 10kV and below, the starting voltage is 5% higher; for voltage levels above 10kV, the starting voltage is 10% higher. Therefore, the rated voltage of transformers also increases accordingly. The rated voltage (kV) of the starting transformers for the line is: 0.4, 3.15, 6.3, 10.5 (11), 15.75, 38.5, 66, 121, 242, 363, 550.<\/p>\n

Hence, if the high-voltage rated voltage of the transformer is higher than the voltage level of the line, the transformer is a step-up transformer; conversely, if the high-voltage rated voltage is lower than the starting rated voltage of the line, it is a step-down transformer.<\/p>\n

In addition, the rated voltage (kV) of generators is usually higher than the line voltage levels, with common values such as 6.3, 10.5, 13.8, 15.75, and 18. Therefore, based on the comparison of rated voltages, only when the low-voltage rated voltage is higher than the line voltage level, it is a step-down transformer; in other cases, it is a step-up transformer. For example:<\/p>\n

(1)<\/span> <\/strong>Rated voltage ratio of 121kV\/10kV indicates a step-up transformer (low-voltage rated voltage is not high).<\/p>\n

(2)<\/span><\/strong> Rated voltage ratio of 110kV\/10.5kV indicates a step-down transformer (only the low-voltage rated voltage is high).<\/p>\n

(3)<\/span><\/strong> Rated voltage ratio of 121kV\/10.5kV indicates a step-up transformer (both low and high-voltage rated voltages are high, essentially a generator transformer).<\/p>\n

(4)<\/span> <\/strong>Rated voltage ratio of 242kV\/121kV\/13.8kV indicates a step-up transformer.<\/p>\n

(5)<\/span><\/strong> Rated voltage ratio of 110kV\/38.5kV\/11kV indicates a step-down transformer.<\/p>\n

Contacto<\/strong><\/h2>\n

LuShan, est. En 1975, es un Chino fabricante profesional que se especializa en los transformadores de potencia y reactores de m\u00e1s de 50 a\u00f1os. Los productos principales son transformador monof\u00e1sico, trif\u00e1sico de transformadores de aislamiento, transformador el\u00e9ctrico, transformador de distribuci\u00f3n, el paso hacia abajo y paso transformador de baja tensi\u00f3n del transformador, transformador de alto voltaje, transformador de control, transformador toroidal, R-transformador con n\u00facleo; DC inductores, CA reactores, filtrado de reactor de l\u00ednea y de carga del reactor, estrangulaciones, el filtrado de los reactores y de los intermedios, de alta frecuencia de los productos<\/a>.<\/p>\n

Nuestros transformadores de potencia y reactores son ampliamente utilizados en las 10 \u00e1reas de aplicaci\u00f3n: rapid transit, maquinaria de construcci\u00f3n, energ\u00eda renovable, de fabricaci\u00f3n inteligentes, equipos m\u00e9dicos, la mina de carb\u00f3n de la explosi\u00f3n de la prevenci\u00f3n, el sistema de excitaci\u00f3n, de vac\u00edo, de sinterizaci\u00f3n(horno), aire acondicionado central.<\/p>\n

Saber m\u00e1s acerca de transformadores de potencia y reactores: www.lstransformer.com<\/a>.<\/p>\n

Si desea obtener soluciones personalizadas para transformadores o reactores, p\u00f3ngase en contacto con nosotros.
\nWhatsApp\uff1a+86 13787095096
\nCorreo electr\u00f3nico: marketing@hnlsdz.com<\/p>","protected":false},"excerpt":{"rendered":"

What are the voltage levels of transmission and transformation lines in China? How can we distinguish between step-up and step-down transformers? In China, the voltage levels of transmission and transformation lines include the following values (kV): 0.38, 3, 6, 10, 15 (20), 35, 60, 110, 220, 330, 500. The voltage at the beginning (power source […]<\/p>\n","protected":false},"author":3,"featured_media":4193,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"default","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"set","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"categories":[48],"tags":[],"class_list":["post-1330","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-faq"],"yoast_head":"\nWhat are the voltage levels of transmission and transformation lines in China? 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The rated voltage (kV) of the starting transformers for the line is: 0.4, 3.15, 6.3, 10.5 (11), 15.75, 38.5, 66, 121, 242, 363, 550.","og_url":"https:\/\/www.lstransformer.com\/es\/what-are-the-voltage-levels-of-transmission-and-transformation-lines-in-china-how-can-we-distinguish-between-step-up-and-step-down-transformers\/","og_site_name":"LS power transformer, Line reactor, High-voltage transformer, Oil-immersed transformer-CHANGSHA LUSHAN ELECTRONIC TECHNOLOGY CO.,LTD","article_published_time":"2026-07-22T05:33:12+00:00","article_modified_time":"2026-09-30T02:51:52+00:00","og_image":[{"width":370,"height":276,"url":"https:\/\/www.lstransformer.com\/wp-content\/uploads\/2026\/07\/1742021213489022.png","type":"image\/png"}],"author":"369703005","twitter_card":"summary_large_image","twitter_misc":{"Escrito por":"369703005","Tiempo de lectura":"3 minutos"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"Article","@id":"https:\/\/www.lstransformer.com\/what-are-the-voltage-levels-of-transmission-and-transformation-lines-in-china-how-can-we-distinguish-between-step-up-and-step-down-transformers\/#article","isPartOf":{"@id":"https:\/\/www.lstransformer.com\/what-are-the-voltage-levels-of-transmission-and-transformation-lines-in-china-how-can-we-distinguish-between-step-up-and-step-down-transformers\/"},"author":{"name":"369703005","@id":"https:\/\/www.lstransformer.com\/#\/schema\/person\/674089c15f4857c19a997f886816d289"},"headline":"What are the voltage levels of transmission and transformation lines in China? 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How can we distinguish between step-up and step-down transformers? - LS power transformer, Line reactor, High-voltage transformer, Oil-immersed transformer-CHANGSHA LUSHAN ELECTRONIC TECHNOLOGY CO.,LTD","isPartOf":{"@id":"https:\/\/www.lstransformer.com\/#website"},"primaryImageOfPage":{"@id":"https:\/\/www.lstransformer.com\/what-are-the-voltage-levels-of-transmission-and-transformation-lines-in-china-how-can-we-distinguish-between-step-up-and-step-down-transformers\/#primaryimage"},"image":{"@id":"https:\/\/www.lstransformer.com\/what-are-the-voltage-levels-of-transmission-and-transformation-lines-in-china-how-can-we-distinguish-between-step-up-and-step-down-transformers\/#primaryimage"},"thumbnailUrl":"https:\/\/www.lstransformer.com\/wp-content\/uploads\/2026\/07\/1742021213489022.png","datePublished":"2026-07-22T05:33:12+00:00","dateModified":"2026-09-30T02:51:52+00:00","description":"In China, the voltage levels of transmission and transformation lines include the following values (kV): 0.38, 3, 6, 10, 15 (20), 35, 60, 110, 220, 330, 500. The voltage at the beginning (power source end) of the line is higher relative to these values. In voltage levels of 10kV and below, the starting voltage is 5% higher; for voltage levels above 10kV, the starting voltage is 10% higher. Therefore, the rated voltage of transformers also increases accordingly. The rated voltage (kV) of the starting transformers for the line is: 0.4, 3.15, 6.3, 10.5 (11), 15.75, 38.5, 66, 121, 242, 363, 550.","breadcrumb":{"@id":"https:\/\/www.lstransformer.com\/what-are-the-voltage-levels-of-transmission-and-transformation-lines-in-china-how-can-we-distinguish-between-step-up-and-step-down-transformers\/#breadcrumb"},"inLanguage":"es","potentialAction":[{"@type":"ReadAction","target":["https:\/\/www.lstransformer.com\/what-are-the-voltage-levels-of-transmission-and-transformation-lines-in-china-how-can-we-distinguish-between-step-up-and-step-down-transformers\/"]}]},{"@type":"ImageObject","inLanguage":"es","@id":"https:\/\/www.lstransformer.com\/what-are-the-voltage-levels-of-transmission-and-transformation-lines-in-china-how-can-we-distinguish-between-step-up-and-step-down-transformers\/#primaryimage","url":"https:\/\/www.lstransformer.com\/wp-content\/uploads\/2026\/07\/1742021213489022.png","contentUrl":"https:\/\/www.lstransformer.com\/wp-content\/uploads\/2026\/07\/1742021213489022.png","width":370,"height":276},{"@type":"BreadcrumbList","@id":"https:\/\/www.lstransformer.com\/what-are-the-voltage-levels-of-transmission-and-transformation-lines-in-china-how-can-we-distinguish-between-step-up-and-step-down-transformers\/#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"\u9996\u9875","item":"https:\/\/www.lstransformer.com\/"},{"@type":"ListItem","position":2,"name":"What are the voltage levels of transmission and transformation lines in China? 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