{"id":1611,"date":"2026-08-29T14:22:37","date_gmt":"2026-08-29T06:22:37","guid":{"rendered":"https:\/\/bastone-petrochem.com\/?p=1611"},"modified":"2026-08-29T14:22:37","modified_gmt":"2026-08-29T06:22:37","slug":"inhibited-vs-uninhibited-transformer-oil","status":"publish","type":"post","link":"https:\/\/bastone-petrochem.com\/es\/inhibited-vs-uninhibited-transformer-oil\/","title":{"rendered":"Aceite de transformador inhibido vs no inhibido: \u00bfCu\u00e1l necesitas?"},"content":{"rendered":"<p class=\"wp-block-paragraph\">Dos aceites ambos certificados como inhibidos bajo la norma IEC 60296 pueden enfrentar l\u00edmites de aceptaci\u00f3n cuatro veces diferentes en acidez y diecis\u00e9is veces en lodos. La edici\u00f3n de 2020 divide los aceites por tipo de rendimiento antes de dividirlos por contenido de inhibidor, y una orden de compra que nombre solo la clase deja ese rango de rendimiento sin especificar.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">El DBPC (2,6-di-terc-butil-p-cresol) interrumpe la cadena de radicales libres que oxida el aceite mineral aislante en lodos \u00e1cidos, pero el inhibidor se consume por la misma reacci\u00f3n que suprime. La cl\u00e1usula 5.1.1 de la norma IEC 60296:2020 lo dice directamente: la concentraci\u00f3n de inhibidor para aceite inhibido en servicio \u201cdebe ser monitoreada y eventualmente mantenida\u201d. Nombrar la clase inhibida en una orden de compra compromete al comprador con ese r\u00e9gimen.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">C\u00f3mo la norma IEC 60296 separa tres clases, no dos<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">La norma IEC 60296:2020 asigna cada aceite mineral aislante a una de tres clases de antioxidantes, medida seg\u00fan la norma IEC 60666:<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>Clase<\/th><th>Letra<\/th><th>Contenido de inhibidor (IEC 60666)<\/th><\/tr><\/thead><tbody><tr><td>No inhibido<\/td><td>U<\/td><td>Por debajo del l\u00edmite de detecci\u00f3n de 0.01%<\/td><\/tr><tr><td>Traza inhibida<\/td><td>T<\/td><td>Al menos 0.01%, por debajo de 0.08%<\/td><\/tr><tr><td>Inhibido<\/td><td>I<\/td><td>Al menos 0.08%, como m\u00e1ximo 0.40%<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Un certificado de la edici\u00f3n de 2012 para un grado con traza inhibida podr\u00eda tener un contenido de inhibidor en cualquier punto por debajo de 0.08%, incluido cero. La edici\u00f3n de 2020 cerr\u00f3 esa brecha a\u00f1adiendo un m\u00ednimo de 0.01%.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">La letra de clase es solo el cuarto car\u00e1cter en la designaci\u00f3n de orden del est\u00e1ndar. La tercera letra obliga a una decisi\u00f3n separada: Tipo A o Tipo B. Ambos tipos ejecutan la misma prueba de oxidaci\u00f3n de 500 horas seg\u00fan la norma IEC 61125 a 120 grados C para un grado inhibido, pero los l\u00edmites de aceptaci\u00f3n divergen:<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>Despu\u00e9s de 500 h a 120 grados C<\/th><th>Tipo A<\/th><th>Tipo B<\/th><\/tr><\/thead><tbody><tr><td>Acidez total<\/td><td>m\u00e1x. 0,3 mg KOH\/g<\/td><td>m\u00e1x. 1,2 mg KOH\/g<\/td><\/tr><tr><td>Lodos<\/td><td>m\u00e1x. 0,05%<\/td><td>m\u00e1x. 0,8%<\/td><\/tr><tr><td>DDF a 90 grados C<\/td><td>m\u00e1x. 0,050<\/td><td>m\u00e1x. 0,500<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Atanasova-Hoehlein, coordinadora del equipo de la IEC que produjo la Edici\u00f3n 5, declar\u00f3 que la revisi\u00f3n buscaba \u201cdistinguir entre aceites minerales aislantes buenos y malos\u201d.\u201d<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Nombrar \u201cinhibido\u201d sin el tipo deja un rango de 4 veces en acidez y 16 veces en lodos al proveedor.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Lo que la clase inhibida obliga en servicio<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">La cl\u00e1usula 5.1.1 de la norma IEC 60296:2020 adjunta una obligaci\u00f3n de monitoreo solo a la clase inhibida, no a aceite no inhibido o con traza inhibida.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">La edici\u00f3n de 2012 da la raz\u00f3n: el proveedor declara la concentraci\u00f3n inicial para que el \u201cagotamiento de aditivos durante el servicio\u201d pueda ser rastreado.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Las duraciones de las pruebas de estabilidad a la oxidaci\u00f3n cuantifican la ventaja. Bajo el m\u00e9todo C de la norma IEC 61125 a 120 grados C, el aceite no inhibido se prueba a 164 horas, el de traza inhibida a 332 horas y el inhibido a 500 horas. Esas duraciones son id\u00e9nticas en ambas ediciones.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Ninguna edici\u00f3n establece una cifra de vida \u00fatil. La afirmaci\u00f3n ampliamente repetida de que el aceite inhibido dura \u201chasta 70% m\u00e1s\u201d proviene de una estimaci\u00f3n de un reciclador de aceite australiano, no del est\u00e1ndar. La propia descripci\u00f3n del reciclador revela la curva de agotamiento: el aceite no inhibido declina gradualmente, mientras que el inhibido se mantiene estable y luego cae bruscamente una vez que la reserva se agota.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">La pr\u00e1ctica industrial trata el contenido de inhibidor por debajo de 0,1% en peso (medido por ASTM D2668) como inaceptable, con re-inhibici\u00f3n dirigida a 0,3%. Ese nivel de acci\u00f3n de 0,1% se sit\u00faa justo por encima del l\u00edmite de clase de 0,08%. Un aceite que se ha agotado hasta el nivel de acci\u00f3n ha ca\u00eddo fuera de la clase en la que fue comprado.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Cuando el aceite no inhibido es la especificaci\u00f3n correcta<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">No inhibido <a href=\"https:\/\/bastone-petrochem.com\/es\/product-category\/other-chemicals\/dielectric-oil\/\">aceite de transformador<\/a> es la especificaci\u00f3n correcta para unidades selladas y de bajo ox\u00edgeno construidas sobre una base de aceite deliberadamente refinada. La cl\u00e1usula 5.1.1 de la norma IEC 60296:2020 describe un refinado \u201coptimizado para retener ciertos compuestos de azufre y arom\u00e1ticos que act\u00faan como antioxidantes naturales\u201d.\u201d<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">La letra de clase te dice si se a\u00f1adi\u00f3 antioxidante sint\u00e9tico, no si el aceite est\u00e1 bien refinado.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Los transformadores sellados con mantas de nitr\u00f3geno o conservadores de vejiga que mantienen el ox\u00edgeno disuelto por debajo de 1000 ppm no requieren estrictamente aceite inhibido. Si el sistema de preservaci\u00f3n tiene fugas, el llenado no inhibido queda expuesto sin la reserva que habr\u00eda comprado tiempo.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"1672\" height=\"941\" src=\"https:\/\/bastone-petrochem.com\/wp-content\/uploads\/2026\/08\/inhibited-vs-uninhibited-transformer-oil-1-8eaa8fb7.png\" alt=\"Corte de un transformador de potencia sellado que muestra un conservador de vejiga con gas nitr\u00f3geno sobre la membrana y aceite aislante llenando el tanque principal alrededor del n\u00facleo y los devanados\" class=\"wp-image-1610\" style=\"max-width:100%;height:auto\" srcset=\"https:\/\/bastone-petrochem.com\/wp-content\/uploads\/2026\/08\/inhibited-vs-uninhibited-transformer-oil-1-8eaa8fb7.png 1672w, https:\/\/bastone-petrochem.com\/wp-content\/uploads\/2026\/08\/inhibited-vs-uninhibited-transformer-oil-1-8eaa8fb7-300x169.png 300w, https:\/\/bastone-petrochem.com\/wp-content\/uploads\/2026\/08\/inhibited-vs-uninhibited-transformer-oil-1-8eaa8fb7-1024x576.png 1024w, https:\/\/bastone-petrochem.com\/wp-content\/uploads\/2026\/08\/inhibited-vs-uninhibited-transformer-oil-1-8eaa8fb7-768x432.png 768w, https:\/\/bastone-petrochem.com\/wp-content\/uploads\/2026\/08\/inhibited-vs-uninhibited-transformer-oil-1-8eaa8fb7-1536x864.png 1536w, https:\/\/bastone-petrochem.com\/wp-content\/uploads\/2026\/08\/inhibited-vs-uninhibited-transformer-oil-1-8eaa8fb7-18x10.png 18w, https:\/\/bastone-petrochem.com\/wp-content\/uploads\/2026\/08\/inhibited-vs-uninhibited-transformer-oil-1-8eaa8fb7-600x338.png 600w\" sizes=\"auto, (max-width: 1672px) 100vw, 1672px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Los transformadores de respiraci\u00f3n libre bajo alta carga t\u00e9rmica son el caso opuesto. La edici\u00f3n de 2012 se\u00f1ala que las unidades \u201ccon temperaturas de operaci\u00f3n m\u00e1s altas o dise\u00f1adas para una vida \u00fatil extendida\u201d est\u00e1n mayormente llenas con aceite inhibido.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Mezclar clases en un llenado existente sigue reglas diferentes entre ediciones. El texto de 2012 requiere la misma clase, los mismos tipos de aditivos y el mismo LCSET. La edici\u00f3n de 2020 cambia a una prueba de rendimiento que requiere que la mezcla funcione al menos tan bien como el peor aceite individual.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Siete servicios p\u00fablicos australianos nombrados ahora especifican aceite inhibido. Un comprador que pueda construir el monitoreo deber\u00eda especificar inhibido. El caso contrario se ajusta a unidades selladas y de bajo ox\u00edgeno con un sistema de preservaci\u00f3n confirmado.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">C\u00f3mo especificar y verificar la clase de aceite de transformador<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">La tabla 1 de la norma IEC 60296:2020 define una designaci\u00f3n de orden de cuatro letras:<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>Posici\u00f3n<\/th><th>Significado<\/th><th>Valores<\/th><\/tr><\/thead><tbody><tr><td>\u00aa letra<\/td><td>Equipo<\/td><td>T (transformador), S (aparamenta)<\/td><\/tr><tr><td>\u00aa letra<\/td><td>Declaraci\u00f3n<\/td><td>V (virgen\/sin usar), R (reciclado)<\/td><\/tr><tr><td>\u00aa letra<\/td><td>Tipo<\/td><td>A (grado alto), B (grado est\u00e1ndar)<\/td><\/tr><tr><td>\u00aa letra<\/td><td>Antioxidante<\/td><td>I (inhibido), U (no inhibido), T (inhibido traza)<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Una orden de compra para aceite de transformador inhibido, de grado alto y virgen se lee TVAI. Los ejemplos pr\u00e1cticos de la norma incluyen TRAI, TVBU y SVAI. LCSET (temperatura m\u00e1s baja de arranque en fr\u00edo, por defecto menos 30 grados C) se declara por separado cuando no es est\u00e1ndar.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">La cl\u00e1usula 5.4 de la IEC 60296:2012 exige que el proveedor declare las concentraciones de inhibidor y pasivador. El documento por entrega que lleva esa declaraci\u00f3n es contractual: cada entrega \u201cpuede\u201d ir acompa\u00f1ada de un documento de conformidad \u201cseg\u00fan lo acordado entre el proveedor y el comprador\u201d.\u201d<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Una hoja de datos de valores t\u00edpicos satisface la declaraci\u00f3n sin vincular un lote espec\u00edfico. Pregunte al proveedor a qu\u00e9 clase de la IEC 60296 certifica el grado ofrecido, y qu\u00e9 edici\u00f3n y tabla nombra (Tabla 3 para Tipo A, Tabla 4 para Tipo B). Solicite el resultado de estabilidad a la oxidaci\u00f3n por lote antes de emitir la orden de compra.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">La edici\u00f3n de 2012 permite permanentemente duraciones reducidas de prueba de oxidaci\u00f3n en Canad\u00e1 y EE. UU.: 332 horas para aceite inhibido y 164 horas para inhibido traza. Un certificado que cite la edici\u00f3n de 2020 debe mostrar qu\u00e9 duraci\u00f3n se ejecut\u00f3 realmente. Trate la disposici\u00f3n de duraci\u00f3n reducida como texto de la edici\u00f3n de 2012 hasta que se confirme en la Ed. 5.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Un aditivo pasivador puede favorecer el resultado de estabilidad a la oxidaci\u00f3n. La norma de 2012 llama al resultado \u201cun resultado optimista\u201d porque el pasivador ralentiza la oxidaci\u00f3n catalizada por cobre en el recipiente de prueba. Una cifra fuerte de 500 horas junto con una declaraci\u00f3n de pasivador no es evidencia independiente de la misma calidad.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">La Decisi\u00f3n de Clase Es una Decisi\u00f3n de Mantenimiento<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">El aceite inhibido resiste m\u00e1s tiempo bajo prueba, pero el antioxidante se consume por la oxidaci\u00f3n que suprime. Nombrar la clase en una orden de compra compromete al comprador a un r\u00e9gimen de monitoreo que su acceso de mantenimiento debe soportar. El aceite no inhibido es la especificaci\u00f3n correcta para construcci\u00f3n sellada y de bajo ox\u00edgeno donde el sistema de preservaci\u00f3n se mantiene.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Nombre el c\u00f3digo de cuatro letras en la orden de compra, no solo la clase. La clase escrita en la orden vale exactamente tanto como el informe de prueba exigido junto a ella.<\/p>","protected":false},"excerpt":{"rendered":"<p>Two oils both certified inhibited under IEC 60296 can face acceptance limits four times apart on acidity and sixteen times apart on sludge. The 2020 edition splits oils by performance type before it splits them by inhibitor content, and a purchase order naming only the class leaves that performance range unspecified. DBPC (2,6-di-tert-butyl-p-cresol) interrupts the [&hellip;]<\/p>\n","protected":false},"author":4,"featured_media":1610,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"_lmt_disableupdate":"","_lmt_disable":"","footnotes":""},"categories":[1],"tags":[78],"class_list":["post-1611","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-grade-selection","tag-transformer-oil"],"blocksy_meta":[],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v25.9 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Inhibited vs Uninhibited Transformer Oil: Which Do You Need? - BASTONE<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/bastone-petrochem.com\/es\/inhibited-vs-uninhibited-transformer-oil\/\" \/>\n<meta property=\"og:locale\" content=\"es_ES\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Inhibited vs Uninhibited Transformer Oil: Which Do You Need? - BASTONE\" \/>\n<meta property=\"og:description\" content=\"Two oils both certified inhibited under IEC 60296 can face acceptance limits four times apart on acidity and sixteen times apart on sludge. 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The 2020 edition splits oils by performance type before it splits them by inhibitor content, and a purchase order naming only the class leaves that performance range unspecified. 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