{"id":2124,"date":"2026-07-24T09:00:00","date_gmt":"2026-07-24T01:00:00","guid":{"rendered":"https:\/\/lbajiele.com\/?p=2124"},"modified":"2026-07-21T11:38:30","modified_gmt":"2026-07-21T03:38:30","slug":"transformer-temperature-rise-class-what-to-specify-in-procurement","status":"publish","type":"post","link":"https:\/\/lbajiele.com\/vi\/blog\/transformer-temperature-rise-class-what-to-specify-in-procurement\/","title":{"rendered":"M\u1ee9c t\u0103ng nhi\u1ec7t \u0111\u1ed9 c\u1ee7a m\u00e1y bi\u1ebfn \u00e1p: C\u1ea7n quy \u0111\u1ecbnh nh\u1eefng g\u00ec trong ho\u1ea1t \u0111\u1ed9ng mua s\u1eafm"},"content":{"rendered":"<div class=\"b2b-article\">\n<p style=\"margin:0 0 16px;line-height:1.7\"><strong>S\u1ef1 t\u0103ng nhi\u1ec7t \u0111\u1ed9 m\u00e1y bi\u1ebfn \u00e1p<\/strong> c\u00e1c gi\u1edbi h\u1ea1n m\u00f4 t\u1ea3 cu\u1ed9n d\u00e2y v\u00e0 d\u1ea7u c\u00f3 th\u1ec3 n\u00f3ng h\u01a1n nhi\u1ec7t \u0111\u1ed9 m\u00f4i tr\u01b0\u1eddng \u1edf t\u1ea3i \u0111\u1ecbnh m\u1ee9c nh\u01b0 th\u1ebf n\u00e0o\u2014v\u00e0 ch\u00fang \u00e2m th\u1ea7m quy\u1ebft \u0111\u1ecbnh k\u00edch th\u01b0\u1edbc, chi ph\u00ed v\u00e0 tu\u1ed5i th\u1ecd ho\u1ea1t \u0111\u1ed9ng.<\/p>\n<p style=\"margin:0 0 16px;line-height:1.7\">C\u00e1c nh\u00f3m mua s\u1eafm sao ch\u00e9p gi\u00e1 tr\u1ecb \u0111\u1ed9 t\u0103ng nhi\u1ec7t gi\u1eefa c\u00e1c d\u1ef1 \u00e1n c\u00f3 th\u1ec3 cu\u1ed1i c\u00f9ng ph\u1ea3i tr\u1ea3 ti\u1ec1n cho c\u00f4ng su\u1ea5t m\u00e0 h\u1ecd kh\u00f4ng th\u1ec3 s\u1eed d\u1ee5ng t\u1ea1i c\u00e1c v\u1ecb tr\u00ed n\u00f3ng, ho\u1eb7c l\u00e0m gi\u1ea3m tu\u1ed5i th\u1ecd c\u00e1ch \u0111i\u1ec7n \u1edf n\u01a1i kh\u00e1c. H\u01b0\u1edbng d\u1eabn n\u00e0y gi\u1ea3i th\u00edch c\u00e1c c\u1ea5p \u0111\u1ed9 v\u00e0 c\u00e1ch di\u1ec5n \u0111\u1ea1t trong Y\u00eau c\u1ea7u B\u00e1o gi\u00e1 (RFQ) gi\u00fap cho c\u00e1c gi\u00e1 th\u1ea7u c\u00f3 th\u1ec3 so s\u00e1nh \u0111\u01b0\u1ee3c v\u1edbi nhau.<\/p>\n<p style=\"margin:0 0 16px;line-height:1.7\">Thu th\u1eadp h\u1ed3 s\u01a1 m\u00f4i tr\u01b0\u1eddng th\u1ef1c t\u1ebf c\u1ee7a \u0111\u1ecba \u0111i\u1ec3m l\u1eafp \u0111\u1eb7t tr\u01b0\u1edbc khi ch\u1ec9 \u0111\u1ecbnh b\u1ea5t c\u1ee9 \u0111i\u1ec1u g\u00ec.<\/p>\n<figure style=\"margin:26px 0;text-align:center\"><img decoding=\"async\" style=\"max-width:640px;width:100%;height:auto;display:block;margin:0 auto;border-radius:8px\" alt=\"Transformer temperature rise specification overview for procurement\" src=\"https:\/\/lbajiele.com\/wp-content\/uploads\/2026\/06\/Dry-Type-Distribution-Transformer.webp\" \/><\/figure>\n<nav class=\"b2b-toc\" style=\"background:#f5f8fa;padding:16px 20px;border-radius:8px;margin:0 0 24px\">\n<h2 style=\"margin:42px 0 14px;scroll-margin-top:96px\">M\u1ee5c l\u1ee5c<\/h2>\n<ul style=\"margin:0 0 18px 1.2em;line-height:1.7\">\n<li style=\"margin:0 0 8px\"><a href=\"#part-1-what-temperature-rise-actually-limits\">Ph\u1ea7n 1. S\u1ef1 t\u0103ng nhi\u1ec7t \u0111\u1ed9 th\u1ef1c s\u1ef1 gi\u1edbi h\u1ea1n \u0111i\u1ec1u g\u00ec<\/a><\/li>\n<li style=\"margin:0 0 8px\"><a href=\"#part-2-rise-limits-by-technology-and-insulation-class\">Ph\u1ea7n 2. Gi\u1edbi h\u1ea1n \u0111\u1ed9 t\u0103ng nhi\u1ec7t \u0111\u1ed9 theo c\u00f4ng ngh\u1ec7 v\u00e0 c\u1ea5p c\u00e1ch \u0111i\u1ec7n<\/a><\/li>\n<li style=\"margin:0 0 8px\"><a href=\"#part-3-ambient-assumptions-and-derating\">Ph\u1ea7n 3. C\u00e1c gi\u1ea3 \u0111\u1ecbnh v\u1ec1 m\u00f4i tr\u01b0\u1eddng xung quanh v\u00e0 gi\u1ea3m t\u1ea3i<\/a><\/li>\n<li style=\"margin:0 0 8px\"><a href=\"#part-4-cooling-designations-and-rise\">Ph\u1ea7n 4. K\u00fd hi\u1ec7u l\u00e0m m\u00e1t v\u00e0 \u0111\u1ed9 t\u0103ng nhi\u1ec7t<\/a><\/li>\n<li style=\"margin:0 0 8px\"><a href=\"#part-5-buying-with-rise-in-mind\">Ph\u1ea7n 5. Mua v\u1edbi k\u1ef3 v\u1ecdng t\u0103ng gi\u00e1<\/a><\/li>\n<li style=\"margin:0 0 8px\"><a href=\"#part-6-product-recommendation-and-fit-boundary\">Ph\u1ea7n 6. \u0110\u1ec1 xu\u1ea5t s\u1ea3n ph\u1ea9m v\u00e0 Ranh gi\u1edbi ph\u00f9 h\u1ee3p<\/a><\/li>\n<li style=\"margin:0 0 8px\"><a href=\"#part-7-common-temperature-rise-mistakes\">Ph\u1ea7n 7. C\u00e1c l\u1ed7i ph\u1ed5 bi\u1ebfn v\u1ec1 t\u0103ng nhi\u1ec7t \u0111\u1ed9<\/a><\/li>\n<li style=\"margin:0 0 8px\"><a href=\"#faq\">C\u00e2u h\u1ecfi th\u01b0\u1eddng g\u1eb7p<\/a><\/li>\n<li style=\"margin:0 0 8px\"><a href=\"#references\">T\u00e0i li\u1ec7u tham kh\u1ea3o<\/a><\/li>\n<\/ul>\n<\/nav>\n<h2 style=\"margin:42px 0 14px;scroll-margin-top:96px\" id=\"part-1-what-temperature-rise-actually-limits\">Ph\u1ea7n 1. S\u1ef1 t\u0103ng nhi\u1ec7t \u0111\u1ed9 th\u1ef1c s\u1ef1 gi\u1edbi h\u1ea1n \u0111i\u1ec1u g\u00ec<\/h2>\n<p style=\"margin:0 0 16px;line-height:1.7\">Gi\u1edbi h\u1ea1n t\u0103ng nhi\u1ec7t \u0111\u1ed9 quy \u0111\u1ecbnh m\u1ee9c t\u0103ng nhi\u1ec7t \u0111\u1ed9 \u1ed5n \u0111\u1ecbnh c\u1ee7a c\u00e1c cu\u1ed9n d\u00e2y \u2014 v\u00e0 c\u1ee7a d\u1ea7u tr\u00ean \u0111\u1ed1i v\u1edbi c\u00e1c thi\u1ebft k\u1ebf l\u00e0m m\u00e1t b\u1eb1ng ch\u1ea5t l\u1ecfng \u2014 \u1edf t\u1ea3i \u0111\u1ecbnh m\u1ee9c theo c\u00e1c \u0111i\u1ec1u ki\u1ec7n nhi\u1ec7t \u0111\u1ed9 m\u00f4i tr\u01b0\u1eddng ti\u00eau chu\u1ea9n.<\/p>\n<p style=\"margin:0 0 16px;line-height:1.7\">Ch\u00fang t\u1ed3n t\u1ea1i \u0111\u1ec3 b\u1ea3o v\u1ec7 l\u1edbp c\u00e1ch \u0111i\u1ec7n: ho\u1ea1t \u0111\u1ed9ng li\u00ean t\u1ee5c cao h\u01a1n \u0111i\u1ec3m thi\u1ebft k\u1ebf v\u00e0i kelvin s\u1ebd l\u00e0m t\u0103ng t\u1ed1c \u0111\u00e1ng k\u1ec3 s\u1ef1 l\u00e3o h\u00f3a nhi\u1ec7t \u0111\u1ed1i v\u1edbi c\u00e1c h\u1ec7 th\u1ed1ng c\u00e1ch \u0111i\u1ec7n th\u00f4ng th\u01b0\u1eddng.<\/p>\n<p style=\"margin:0 0 16px;line-height:1.7\">\u0110\u1ec3 c\u00f3 ng\u1eef c\u1ea3nh li\u00ean quan, h\u00e3y xem <a href=\"https:\/\/lbajiele.com\/vi\/blog\/huong-dan-van-hanh-qua-tai-cho-may-bien-ap-ngam-dau\/\">h\u01b0\u1edbng d\u1eabn v\u1eadn h\u00e0nh qu\u00e1 t\u1ea3i cho m\u00e1y bi\u1ebfn \u00e1p ng\u00e2m d\u1ea7u<\/a>.<br \/>\n\u0110\u1ec3 c\u00f3 ng\u1eef c\u1ea3nh li\u00ean quan, h\u00e3y xem <a href=\"https:\/\/lbajiele.com\/vi\/blog\/dry-type-vs-oil-immersed-transformer-distribution-comparison-guide\/\">H\u01b0\u1edbng d\u1eabn so s\u00e1nh m\u00e1y bi\u1ebfn \u00e1p kh\u00f4 v\u00e0 m\u00e1y bi\u1ebfn \u00e1p ng\u00e2m d\u1ea7u<\/a>.<\/p>\n<h2 style=\"margin:42px 0 14px;scroll-margin-top:96px\" id=\"part-2-rise-limits-by-technology-and-insulation-class\">Ph\u1ea7n 2. Gi\u1edbi h\u1ea1n \u0111\u1ed9 t\u0103ng nhi\u1ec7t \u0111\u1ed9 theo c\u00f4ng ngh\u1ec7 v\u00e0 c\u1ea5p c\u00e1ch \u0111i\u1ec7n<\/h2>\n<p style=\"margin:0 0 16px;line-height:1.7\">C\u00e1c thi\u1ebft k\u1ebf kh\u00e1c nhau \u0111\u00e1p \u1ee9ng c\u00e1c tr\u1ea7n nh\u00e0 kh\u00e1c nhau d\u01b0\u1edbi c\u00f9ng m\u1ed9t logic.<\/p>\n<figure style=\"margin:26px 0;text-align:center\"><img decoding=\"async\" style=\"max-width:640px;width:100%;height:auto;display:block;margin:0 auto;border-radius:8px\" alt=\"Temperature rise limits by design and insulation class\" src=\"https:\/\/lbajiele.com\/wp-content\/uploads\/2026\/06\/Dry-Type-Distribution-Transformer.2.webp\" \/><\/figure>\n<table style=\"width:100%;border-collapse:collapse\">\n<thead>\n<tr>\n<th style=\"border:1px solid #d9e1e8;padding:9px 12px;background:#f5f8fa;text-align:left\">Thi\u1ebft k\u1ebf<\/th>\n<th style=\"border:1px solid #d9e1e8;padding:9px 12px;background:#f5f8fa;text-align:left\">C\u01a1 s\u1edf t\u0103ng ph\u1ed5 bi\u1ebfn<\/th>\n<th style=\"border:1px solid #d9e1e8;padding:9px 12px;background:#f5f8fa;text-align:left\">T\u00e0i li\u1ec7u tham kh\u1ea3o<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td style=\"border:1px solid #d9e1e8;padding:9px 12px\">Ng\u00e2m d\u1ea7u (ONAN)<\/td>\n<td style=\"border:1px solid #d9e1e8;padding:9px 12px\">\u0110\u1ed9 t\u0103ng nhi\u1ec7t \u0111\u1ed9 d\u1ea7u \u0111\u1ec9nh 60 K v\u00e0 \u0111\u1ed9 t\u0103ng nhi\u1ec7t \u0111\u1ed9 cu\u1ed9n d\u00e2y trung b\u00ecnh 65 K<\/td>\n<td style=\"border:1px solid #d9e1e8;padding:9px 12px\">IEC 60076-2<\/td>\n<\/tr>\n<tr>\n<td style=\"border:1px solid #d9e1e8;padding:9px 12px\">H\u1ec7 th\u1ed1ng lo\u1ea1i kh\u00f4, c\u1ea5p F<\/td>\n<td style=\"border:1px solid #d9e1e8;padding:9px 12px\">\u0110\u1ed9 t\u0103ng nhi\u1ec7t \u0111\u1ed9 c\u1ee7a cu\u1ed9n d\u00e2y ph\u00f9 h\u1ee3p v\u1edbi h\u1ec7 th\u1ed1ng c\u00e1ch \u0111i\u1ec7n c\u1ea5p 155<\/td>\n<td style=\"border:1px solid #d9e1e8;padding:9px 12px\">IEC 60076-11<\/td>\n<\/tr>\n<tr>\n<td style=\"border:1px solid #d9e1e8;padding:9px 12px\">H\u1ec7 th\u1ed1ng lo\u1ea1i kh\u00f4, c\u1ea5p H<\/td>\n<td style=\"border:1px solid #d9e1e8;padding:9px 12px\">Tr\u1ea7n t\u0103ng u\u1ed1n l\u01b0\u1ee3n ph\u00f9 h\u1ee3p v\u1edbi h\u1ec7 th\u1ed1ng c\u00e1ch \u0111i\u1ec7n c\u1ea5p 180<\/td>\n<td style=\"border:1px solid #d9e1e8;padding:9px 12px\">IEC 60076-11<\/td>\n<\/tr>\n<tr>\n<td style=\"border:1px solid #d9e1e8;padding:9px 12px\">Thi\u1ebft k\u1ebf c\u1ea1p tr\u1ec5<\/td>\n<td style=\"border:1px solid #d9e1e8;padding:9px 12px\">\u0110\u1ed9 cao th\u1ea5p \u0111\u01b0\u1ee3c mua l\u00e0m bi\u00ean \u0111\u1ed9 t\u1ea3i<\/td>\n<td style=\"border:1px solid #d9e1e8;padding:9px 12px\">\u0110\u1eb7c t\u1ea3 d\u1ef1 \u00e1n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p style=\"margin:0 0 16px;line-height:1.7\">Gi\u00e1 tr\u1ecb t\u0103ng nhi\u1ec7t trong catalogue ch\u1ec9 l\u00e0 d\u1eef li\u1ec7u tham kh\u1ea3o; c\u00e1c s\u1ed1 li\u1ec7u \u0111\u01b0\u1ee3c \u0111\u1ea3m b\u1ea3o s\u1ebd xu\u1ea5t hi\u1ec7n tr\u00ean c\u00e1c b\u1ea3n v\u1ebd \u0111\u00e3 ph\u00e1t h\u00e0nh v\u00e0 \u0111\u01b0\u1ee3c ch\u1ee9ng minh b\u1eb1ng c\u00e1c th\u1eed nghi\u1ec7m lo\u1ea1i v\u1ec1 \u0111\u1ed9 t\u0103ng nhi\u1ec7t.<\/p>\n<h2 style=\"margin:42px 0 14px;scroll-margin-top:96px\" id=\"part-3-ambient-assumptions-and-derating\">Ph\u1ea7n 3. C\u00e1c gi\u1ea3 \u0111\u1ecbnh v\u1ec1 m\u00f4i tr\u01b0\u1eddng xung quanh v\u00e0 gi\u1ea3m t\u1ea3i<\/h2>\n<p style=\"margin:0 0 16px;line-height:1.7\">C\u00e1c m\u1ee9c \u0111\u1ecbnh m\u1ee9c ti\u00eau chu\u1ea9n gi\u1ea3 \u0111\u1ecbnh m\u1ed9t t\u1eadp h\u1ee3p nhi\u1ec7t \u0111\u1ed9 m\u00f4i tr\u01b0\u1eddng xung quanh \u0111\u00e3 x\u00e1c \u0111\u1ecbnh \u2014 th\u00f4ng th\u01b0\u1eddng l\u00e0 t\u1ed1i \u0111a 40 \u00b0C v\u1edbi m\u1ee9c trung b\u00ecnh h\u00e0ng ng\u00e0y v\u00e0 h\u00e0ng n\u0103m th\u1ea5p h\u01a1n.<\/p>\n<p style=\"margin:0 0 16px;line-height:1.7\">C\u00e1c v\u1ecb tr\u00ed c\u00f3 nhi\u1ec7t \u0111\u1ed9 cao h\u01a1n m\u1ee9c chu\u1ea9n c\u01a1 s\u1edf c\u1ea7n \u0111\u01b0\u1ee3c gi\u1ea3m t\u1ea3i ho\u1eb7c thi\u1ebft k\u1ebf gi\u1ea3m \u0111\u1ed9 t\u0103ng nhi\u1ec7t \u0111\u1ec3 b\u1ea3o v\u1ec7 tu\u1ed5i th\u1ecd c\u1ee7a l\u1edbp c\u00e1ch \u0111i\u1ec7n.<\/p>\n<p style=\"margin:0 0 16px;line-height:1.7\">\u0110\u1ed9 cao tr\u00ean 1000 m c\u0169ng l\u00e0m lo\u00e3ng kh\u00f4ng kh\u00ed l\u00e0m m\u00e1t; h\u00e3y n\u00eau r\u00f5 \u0111i\u1ec1u n\u00e0y trong y\u00eau c\u1ea7u b\u00e1o gi\u00e1 (RFQ) \u0111\u1ec3 nh\u00e0 m\u00e1y \u0111i\u1ec1u ch\u1ec9nh thi\u1ebft k\u1ebf.<\/p>\n<h2 style=\"margin:42px 0 14px;scroll-margin-top:96px\" id=\"part-4-cooling-designations-and-rise\">Ph\u1ea7n 4. K\u00fd hi\u1ec7u l\u00e0m m\u00e1t v\u00e0 \u0111\u1ed9 t\u0103ng nhi\u1ec7t<\/h2>\n<p style=\"margin:0 0 16px;line-height:1.7\">ONAN v\u00e0 ONAF \u0111\u1ed1i v\u1edbi thi\u1ebft k\u1ebf m\u00e1y bi\u1ebfn \u00e1p ng\u00e2m d\u1ea7u, v\u00e0 AN ho\u1eb7c AF \u0111\u1ed1i v\u1edbi thi\u1ebft k\u1ebf m\u00e1y bi\u1ebfn \u00e1p kh\u00f4, x\u00e1c \u0111\u1ecbnh c\u00e1ch th\u1ee9c gi\u1edbi h\u1ea1n \u0111\u1ed9 t\u0103ng nhi\u1ec7t \u0111\u01b0\u1ee3c \u0111\u00e1p \u1ee9ng \u1edf m\u1ed7i \u0111\u1ecbnh m\u1ee9c danh \u0111\u1ecbnh.<\/p>\n<p style=\"margin:0 0 16px;line-height:1.7\">\u0110\u1ecbnh m\u1ee9c \u0111\u01b0\u1ee3c h\u1ed7 tr\u1ee3 b\u1eb1ng qu\u1ea1t \u0111\u1ea1t gi\u1edbi h\u1ea1n t\u0103ng nhi\u1ec7t \u0111\u1ed9 t\u01b0\u01a1ng t\u1ef1 \u1edf m\u1ee9c kVA cao h\u01a1n, \u0111\u1ed5i l\u1ea1i l\u00e0 chi ph\u00ed b\u1ea3o tr\u00ec qu\u1ea1t v\u00e0 \u0111i d\u00e2y \u0111i\u1ec1u khi\u1ec3n.<\/p>\n<p style=\"margin:0 0 16px;line-height:1.7\">X\u00e1c nh\u1eadn xem c\u00e1c kho\u1ea3n t\u1ed5n th\u1ea5t \u0111\u01b0\u1ee3c tr\u00edch d\u1eabn \u0111\u1ec1 c\u1eadp \u0111\u1ebfn m\u1ee9c \u0111\u1ecbnh m\u1ee9c n\u00e0o\u2014ph\u01b0\u01a1ng ph\u00e1p l\u00e0m m\u00e1t v\u00e0 s\u1ef1 thay \u0111\u1ed5i v\u1ecf m\u00e1y \u0111\u1ec1u l\u00e0m thay \u0111\u1ed5i c\u1ea3 s\u1ed1 li\u1ec7u t\u1ed5n th\u1ea5t l\u1eabn ti\u1ebfng \u1ed3n c\u00f3 th\u1ec3 nghe th\u1ea5y.<\/p>\n<h2 style=\"margin:42px 0 14px;scroll-margin-top:96px\" id=\"part-5-buying-with-rise-in-mind\">Ph\u1ea7n 5. Mua v\u1edbi k\u1ef3 v\u1ecdng t\u0103ng gi\u00e1<\/h2>\n<p style=\"margin:0 0 16px;line-height:1.7\">M\u1ed9t thi\u1ebft b\u1ecb c\u00f3 chi\u1ec1u cao th\u1ea5p h\u01a1n s\u1ebd ch\u1ea1y m\u00e1t h\u01a1n \u1edf c\u00f9ng m\u1ee9c t\u1ea3i, mang l\u1ea1i kho\u1ea3ng d\u1ef1 ph\u00f2ng qu\u00e1 t\u1ea3i v\u00e0 tu\u1ed5i th\u1ecd c\u00e1ch \u0111i\u1ec7n d\u00e0i h\u01a1n v\u1edbi chi ph\u00ed ban \u0111\u1ea7u cao h\u01a1n.<\/p>\n<p style=\"margin:0 0 16px;line-height:1.7\">N\u00eau r\u00f5 c\u1ea5p \u0111\u1ed9 t\u0103ng nhi\u1ec7t \u0111\u1ed9 y\u00eau c\u1ea7u, \u0111i\u1ec1u ki\u1ec7n m\u00f4i tr\u01b0\u1eddng xung quanh v\u00e0 b\u1ea5t k\u1ef3 k\u1ef3 v\u1ecdng qu\u00e1 t\u1ea3i n\u00e0o trong RFQ thay v\u00ec y\u00eau c\u1ea7u chung chung v\u1ec1 m\u1ed9t thi\u1ebft k\u1ebf ch\u1eafc ch\u1eafn.<\/p>\n<p style=\"margin:0 0 16px;line-height:1.7\">X\u00e1c minh s\u1ef1 tu\u00e2n th\u1ee7 th\u00f4ng qua b\u00e1o c\u00e1o th\u1eed nghi\u1ec7m \u0111\u1ed9 t\u0103ng nhi\u1ec7t \u0111\u01b0\u1ee3c vi\u1ec7n d\u1eabn trong h\u1ee3p \u0111\u1ed3ng.<\/p>\n<h2 style=\"margin:42px 0 14px;scroll-margin-top:96px\" id=\"part-6-product-recommendation-and-fit-boundary\">Ph\u1ea7n 6. \u0110\u1ec1 xu\u1ea5t s\u1ea3n ph\u1ea9m v\u00e0 Ranh gi\u1edbi ph\u00f9 h\u1ee3p<\/h2>\n<p style=\"margin:0 0 16px;line-height:1.7\"><strong>G\u1ee3i \u00fd s\u1ea3n ph\u1ea9m:<\/strong> S\u1ef1 t\u0103ng nhi\u1ec7t \u0111\u1ed9 t\u01b0\u01a1ng t\u00e1c v\u1edbi c\u1ea5p l\u00e0m m\u00e1t\u2014x\u00e1c nh\u1eadn c\u1ea3 hai khi ch\u1ecdn d\u00f2ng s\u1ea3n ph\u1ea9m. B\u1eaft \u0111\u1ea7u t\u1ea1i <a href=\"https:\/\/lbajiele.com\/vi\/transformer\/\">danh m\u1ee5c s\u1ea3n ph\u1ea9m m\u00e1y bi\u1ebfn \u00e1p<\/a>, sau \u0111\u00f3 xem l\u1ea1i <a href=\"https:\/\/lbajiele.com\/vi\/san-pham\/scb-resin-insulation-dry-transformer-series\/\">D\u00f2ng m\u00e1y bi\u1ebfn \u00e1p kh\u00f4 c\u00e1ch \u0111i\u1ec7n nh\u1ef1a SC(B)<\/a> v\u00e0 <a href=\"https:\/\/lbajiele.com\/vi\/san-pham\/s-m-oil-immersed-power-transformer\/\">D\u00f2ng m\u00e1y bi\u1ebfn \u00e1p ng\u00e2m d\u1ea7u S\u25a1-M<\/a> tr\u00e1i v\u1edbi th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt \u0111\u00e3 \u0111\u01b0\u1ee3c ph\u00ea duy\u1ec7t.<\/p>\n<figure style=\"margin:26px 0;text-align:center\"><img decoding=\"async\" style=\"max-width:640px;width:100%;height:auto;display:block;margin:0 auto;border-radius:8px\" alt=\"Transformer product series for temperature rise confirmation\" src=\"https:\/\/lbajiele.com\/wp-content\/uploads\/2026\/04\/S22-M-OIL-IMMERSED-POWER-TRANSFORMER.webp\" \/><\/figure>\n<table style=\"width:100%;border-collapse:collapse\">\n<thead>\n<tr>\n<th style=\"border:1px solid #d9e1e8;padding:9px 12px;background:#f5f8fa;text-align:left\">Ph\u00f9 h\u1ee3p h\u01a1n<\/th>\n<th style=\"border:1px solid #d9e1e8;padding:9px 12px;background:#f5f8fa;text-align:left\">Kh\u00f4ng ph\u00f9 h\u1ee3p n\u1ebfu kh\u00f4ng nghi\u00ean c\u1ee9u th\u00eam<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td style=\"border:1px solid #d9e1e8;padding:9px 12px\">C\u00e1c trang web c\u00f3 d\u1eef li\u1ec7u ghi nh\u1eadn v\u1ec1 m\u00f4i tr\u01b0\u1eddng xung quanh v\u00e0 \u0111\u1ed9 cao<\/td>\n<td style=\"border:1px solid #d9e1e8;padding:9px 12px\">Sao ch\u00e9p c\u00e1c gi\u00e1 tr\u1ecb gia t\u0103ng t\u1eeb m\u1ed9t v\u00f9ng kh\u00ed h\u1eadu kh\u00e1c<\/td>\n<\/tr>\n<tr>\n<td style=\"border:1px solid #d9e1e8;padding:9px 12px\">Ng\u01b0\u1eddi mua kh\u1edbp v\u1edbi l\u1edbp t\u0103ng cho chi\u1ebfn l\u01b0\u1ee3c t\u1ea3i<\/td>\n<td style=\"border:1px solid #d9e1e8;padding:9px 12px\">Gi\u1ea3 s\u1eed ng\u01b0\u1eddi h\u00e2m m\u1ed9 c\u00f3 th\u1ec3 c\u1ee9u v\u00e3n m\u1ed9t th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt qu\u00e1 nh\u1ecf g\u1ecdn sau \u0111\u00f3<\/td>\n<\/tr>\n<tr>\n<td style=\"border:1px solid #d9e1e8;padding:9px 12px\">C\u00e1c d\u1ef1 \u00e1n x\u00e1c minh \u0111\u1ed9 t\u0103ng nhi\u1ec7t th\u00f4ng qua c\u00e1c b\u00e1o c\u00e1o th\u1eed nghi\u1ec7m \u0111i\u1ec3n h\u00ecnh<\/td>\n<td style=\"border:1px solid #d9e1e8;padding:9px 12px\">So s\u00e1nh c\u00e1c gi\u00e1 th\u1ea7u \u0111\u01b0\u1ee3c b\u00e1o c\u00e1o tr\u00ean c\u00e1c m\u1ee9c c\u01a1 s\u1edf m\u00f4i tr\u01b0\u1eddng kh\u00e1c nhau<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p style=\"margin:0 0 16px;line-height:1.7\">G\u1eedi c\u00f4ng su\u1ea5t \u0111\u1ecbnh m\u1ee9c kVA v\u00e0 t\u1ed5 h\u1ee3p \u0111i\u1ec7n \u00e1p, nh\u00f3m \u0111\u1ea5u d\u00e2y v\u00e0 d\u1ea3i \u0111i\u1ec1u \u00e1p, t\u1ed5n th\u1ea5t kh\u00f4ng t\u1ea3i v\u00e0 t\u1ed5n th\u1ea5t c\u00f3 t\u1ea3i, ph\u01b0\u01a1ng ph\u00e1p l\u00e0m m\u00e1t v\u00e0 v\u1ecf b\u1ea3o v\u1ec7, c\u00f9ng v\u1edbi \u0111i\u1ec7n \u00e1p ng\u1eafn m\u1ea1ch m\u1ee5c ti\u00eau th\u00f4ng qua <a href=\"https:\/\/lbajiele.com\/vi\/contact-us\/\">Li\u00ean h\u1ec7 v\u1edbi ch\u00fang t\u00f4i<\/a> \u0111\u1ec3 x\u00e1c nh\u1eadn d\u00e0nh ri\u00eang cho m\u00f4 h\u00ecnh.<\/p>\n<h2 style=\"margin:42px 0 14px;scroll-margin-top:96px\" id=\"part-7-common-temperature-rise-mistakes\">Ph\u1ea7n 7. C\u00e1c l\u1ed7i ph\u1ed5 bi\u1ebfn v\u1ec1 t\u0103ng nhi\u1ec7t \u0111\u1ed9<\/h2>\n<ul style=\"margin:0 0 18px 1.2em;line-height:1.7\">\n<li style=\"margin:0 0 8px\">Quy \u0111\u1ecbnh \u0111\u1ed9 t\u0103ng nhi\u1ec7t ti\u00eau chu\u1ea9n cho m\u1ed9t c\u00f4ng tr\u01b0\u1eddng 50 \u00b0C m\u00e0 kh\u00f4ng c\u1ea7n \u0111\u00e1nh gi\u00e1 gi\u1ea3m c\u00f4ng su\u1ea5t.<\/li>\n<li style=\"margin:0 0 8px\">Tr\u1ed9n l\u1eabn c\u00e1c c\u1ea5p \u0111\u1ed9 t\u0103ng gi\u00e1 gi\u1eefa c\u00e1c l\u1ea7n \u0111\u1ea5u th\u1ea7u v\u00e0 so s\u00e1nh tr\u1ef1c ti\u1ebfp gi\u00e1 c\u1ea3.<\/li>\n<li style=\"margin:0 0 8px\">B\u1ecf qua c\u00e1c hi\u1ec7u \u1ee9ng \u0111\u1ed9 cao \u0111\u1ed1i v\u1edbi c\u1ea3 l\u00e0m m\u00e1t b\u1eb1ng d\u1ea7u v\u00e0 ki\u1ec3u kh\u00f4.<\/li>\n<li style=\"margin:0 0 8px\">Xem c\u00e1c gi\u1edbi h\u1ea1n t\u0103ng tr\u01b0\u1edfng l\u00e0 m\u1ee5c ti\u00eau v\u1eadn h\u00e0nh thay v\u00ec l\u00e0 m\u1ee9c tr\u1ea7n.<\/li>\n<li style=\"margin:0 0 8px\">B\u1ecf qua c\u01a1 s\u1edf xung quanh kh\u1ecfi b\u1ea3ng x\u1ebfp h\u1ea1ng RFQ.<\/li>\n<li style=\"margin:0 0 8px\">Qu\u00ean m\u1ea5t r\u1eb1ng c\u00e1c k\u1ebf ho\u1ea1ch qu\u00e1 t\u1ea3i ph\u1ee5 thu\u1ed9c v\u00e0o bi\u00ean \u0111\u1ed9 t\u0103ng v\u00e0 c\u00e1c giai \u0111o\u1ea1n l\u00e0m m\u00e1t.<\/li>\n<\/ul>\n<h2 style=\"margin:42px 0 14px;scroll-margin-top:96px\" id=\"faq\">C\u00e2u h\u1ecfi th\u01b0\u1eddng g\u1eb7p<\/h2>\n<h3 style=\"margin:28px 0 12px\">\u0110\u1ed9 t\u0103ng nhi\u1ec7t \u0111\u1ed9 c\u1ee7a m\u00e1y bi\u1ebfn \u00e1p l\u00e0 g\u00ec?<\/h3>\n<p style=\"margin:0 0 16px;line-height:1.7\">\u0110\u1ed9 t\u0103ng nhi\u1ec7t \u0111\u1ed9 cho ph\u00e9p \u1edf tr\u1ea1ng th\u00e1i \u1ed5n \u0111\u1ecbnh c\u1ee7a cu\u1ed9n d\u00e2y v\u00e0 d\u1ea7u so v\u1edbi nhi\u1ec7t \u0111\u1ed9 m\u00f4i tr\u01b0\u1eddng \u1edf t\u1ea3i \u0111\u1ecbnh m\u1ee9c, \u0111\u01b0\u1ee3c \u0111\u1ecbnh ngh\u0129a trong ti\u00eau chu\u1ea9n IEC 60076-2 \u0111\u1ed1i v\u1edbi m\u00e1y bi\u1ebfn \u00e1p ng\u00e2m d\u1ea7u v\u00e0 IEC 60076-11 \u0111\u1ed1i v\u1edbi m\u00e1y bi\u1ebfn \u00e1p kh\u00f4.<\/p>\n<h3 style=\"margin:28px 0 12px\">Trong th\u1ef1c t\u1ebf, \u0111\u1ed9 t\u0103ng nhi\u1ec7t \u0111\u1ed9 qu\u1ea5n d\u00e2y 65 K c\u00f3 ngh\u0129a l\u00e0 g\u00ec?<\/h3>\n<p style=\"margin:0 0 16px;line-height:1.7\">\u1ede nhi\u1ec7t \u0111\u1ed9 m\u00f4i tr\u01b0\u1eddng 40 \u00b0C, cu\u1ed9n d\u00e2y trung b\u00ecnh c\u00f3 th\u1ec3 \u0111\u1ea1t kho\u1ea3ng 105 \u00b0C \u1edf t\u1ea3i \u0111\u1ecbnh m\u1ee9c, v\u1edbi c\u00e1c \u0111i\u1ec3m n\u00f3ng t\u0103ng cao h\u01a1n trong ph\u1ea1m vi cho ph\u00e9p thi\u1ebft k\u1ebf.<\/p>\n<h3 style=\"margin:28px 0 12px\">C\u00e1c c\u1ea5p \u0111\u1ed9 c\u00e1ch \u0111i\u1ec7n li\u00ean quan nh\u01b0 th\u1ebf n\u00e0o \u0111\u1ebfn \u0111\u1ed9 t\u0103ng nhi\u1ec7t \u0111\u1ed9?<\/h3>\n<p style=\"margin:0 0 16px;line-height:1.7\">H\u1ec7 th\u1ed1ng c\u00e1ch \u0111i\u1ec7n quy \u0111\u1ecbnh nhi\u1ec7t \u0111\u1ed9 li\u00ean t\u1ee5c t\u1ed1i \u0111a; gi\u1edbi h\u1ea1n t\u0103ng nhi\u1ec7t gi\u1eef cho nhi\u1ec7t \u0111\u1ed9 v\u1eadn h\u00e0nh n\u1eb1m \u1edf m\u1ee9c an to\u00e0n b\u00ean d\u01b0\u1edbi gi\u1edbi h\u1ea1n \u0111\u00f3 trong \u0111i\u1ec1u ki\u1ec7n m\u00f4i tr\u01b0\u1eddng ti\u00eau chu\u1ea9n.<\/p>\n<h3 style=\"margin:28px 0 12px\">Nhi\u1ec7t \u0111\u1ed9 t\u0103ng th\u1ea5p h\u01a1n c\u00f3 k\u00e9o d\u00e0i tu\u1ed5i th\u1ecd c\u1ee7a m\u00e1y bi\u1ebfn \u00e1p kh\u00f4ng?<\/h3>\n<p style=\"margin:0 0 16px;line-height:1.7\">Nh\u00ecn chung l\u00e0 c\u00f3\u2014ch\u1ea1y m\u00e1t h\u01a1n gi\u00fap l\u00e0m ch\u1eadm qu\u00e1 tr\u00ecnh l\u00e3o h\u00f3a c\u1ee7a l\u1edbp c\u00e1ch \u0111i\u1ec7n v\u00e0 t\u0103ng th\u00eam d\u01b0 l\u01b0\u1ee3ng qu\u00e1 t\u1ea3i, v\u1edbi chi ph\u00ed mua s\u1eafm cao h\u01a1n.<\/p>\n<h3 style=\"margin:28px 0 12px\">Nhi\u1ec7t \u0111\u1ed9 m\u00f4i tr\u01b0\u1eddng t\u1ea1i c\u00f4ngtr\u01b0\u1eddng l\u00e0m thay \u0111\u1ed5i th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt nh\u01b0 th\u1ebf n\u00e0o?<\/h3>\n<p style=\"margin:0 0 16px;line-height:1.7\">Nhi\u1ec7t \u0111\u1ed9 m\u00f4i tr\u01b0\u1eddng v\u01b0\u1ee3t qu\u00e1 m\u1ee9c ti\u00eau chu\u1ea9n \u0111\u00f2i h\u1ecfi ph\u1ea3i gi\u1ea3m t\u1ea3i (derating), thi\u1ebft k\u1ebf t\u0103ng nhi\u1ec7t \u0111\u1ed9 th\u1ea5p h\u01a1n ho\u1eb7c l\u00e0m m\u00e1t t\u0103ng c\u01b0\u1eddng; h\u00e3y n\u00eau r\u00f5 c\u1ea5u h\u00ecnh th\u1ef1c t\u1ebf trong y\u00eau c\u1ea7u b\u00e1o gi\u00e1 (RFQ).<\/p>\n<h3 style=\"margin:28px 0 12px\">C\u00e1c m\u1ee9c \u0111\u1ecbnh m\u1ee9c ONAN v\u00e0 ONAF c\u00f3 chung gi\u1edbi h\u1ea1n \u0111\u1ed9 t\u0103ng nhi\u1ec7t kh\u00f4ng?<\/h3>\n<p style=\"margin:0 0 16px;line-height:1.7\">C\u00f3\u2014c\u00e1c gi\u1edbi h\u1ea1n \u00e1p d\u1ee5ng t\u1ea1i m\u1ed7i \u0111\u1ecbnh m\u1ee9c \u0111\u01b0\u1ee3c c\u00f4ng b\u1ed1; qu\u1ea1t cho ph\u00e9p c\u00f4ng su\u1ea5t kVA cao h\u01a1n trong khi v\u1eabn \u0111\u00e1p \u1ee9ng c\u00f9ng m\u1ed9t m\u1ee9c t\u0103ng nhi\u1ec7t \u0111\u1ed9 gi\u1edbi h\u1ea1n.<\/p>\n<h3 style=\"margin:28px 0 12px\">D\u1eef li\u1ec7u v\u1ec1 m\u1ee9c t\u0103ng nhi\u1ec7t \u0111\u1ed9 m\u00e0 Y\u00eau c\u1ea7u B\u00e1o gi\u00e1 (RFQ) n\u00ean n\u00eau l\u00e0 g\u00ec?<\/h3>\n<p style=\"margin:0 0 16px;line-height:1.7\">C\u1ea5p t\u0103ng nhi\u1ec7t, t\u1eadp h\u1ee3p nhi\u1ec7t \u0111\u1ed9 m\u00f4i tr\u01b0\u1eddng, \u0111\u1ed9 cao, v\u01b0\u1ee3t qu\u00e1 c\u00e1c k\u1ef3 v\u1ecdng, v\u00e0 y\u00eau c\u1ea7u v\u1ec1 m\u1ed9t tham chi\u1ebfu th\u1eed nghi\u1ec7m ki\u1ec3u t\u0103ng nhi\u1ec7t.<\/p>\n<h2 style=\"margin:42px 0 14px;scroll-margin-top:96px\" id=\"references\">T\u00e0i li\u1ec7u tham kh\u1ea3o<\/h2>\n<ul style=\"margin:0 0 18px 1.2em;line-height:1.7\">\n<li style=\"margin:0 0 8px\"><a href=\"https:\/\/webstore.iec.ch\/en\/publication\/599\" rel=\"nofollow noopener\" target=\"_blank\">IEC 60076-2: \u0110\u1ed9 t\u0103ng nhi\u1ec7t \u0111\u1ed1i v\u1edbi m\u00e1y bi\u1ebfn \u00e1p ng\u00e2m ch\u1ea5t l\u1ecfng<\/a><\/li>\n<li style=\"margin:0 0 8px\"><a href=\"https:\/\/webstore.iec.ch\/en\/publication\/591\" rel=\"nofollow noopener\" target=\"_blank\">IEC 60076-11: M\u00e1y bi\u1ebfn \u00e1p \u0111i\u1ec7n l\u1ef1c kh\u00f4<\/a><\/li>\n<li style=\"margin:0 0 8px\"><a href=\"https:\/\/standards.ieee.org\/ieee\/C57.91\/5297\/\" rel=\"nofollow noopener\" target=\"_blank\">IEEE C57.91: H\u01b0\u1edbng d\u1eabn v\u1eadn h\u00e0nh t\u1ea3i cho m\u00e1y bi\u1ebfn \u00e1p ng\u00e2m d\u1ea7u kho\u00e1ng<\/a><\/li>\n<li style=\"margin:0 0 8px\"><a href=\"https:\/\/webstore.iec.ch\/en\/publication\/592\" rel=\"nofollow noopener\" target=\"_blank\">IEC 60076-12: H\u01b0\u1edbng d\u1eabn qu\u00e1 t\u1ea3i cho m\u00e1y bi\u1ebfn \u00e1p l\u1ef1c kh\u00f4<\/a><\/li>\n<\/ul>\n<\/div>","protected":false},"excerpt":{"rendered":"<p>Transformer temperature rise limits describe how hot windings and oil may run above ambient at rated load\u2014and they quietly set size, cost, and service life. Procurement teams who copy rise values between projects can end up paying for capacity they cannot use at hot sites, or shortening insulation life elsewhere. This guide explains the classes [&hellip;]<\/p>\n","protected":false},"author":5,"featured_media":1922,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[31],"tags":[],"class_list":["post-2124","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog"],"blocksy_meta":[],"acf":[],"_links":{"self":[{"href":"https:\/\/lbajiele.com\/vi\/wp-json\/wp\/v2\/posts\/2124","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/lbajiele.com\/vi\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/lbajiele.com\/vi\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/lbajiele.com\/vi\/wp-json\/wp\/v2\/users\/5"}],"replies":[{"embeddable":true,"href":"https:\/\/lbajiele.com\/vi\/wp-json\/wp\/v2\/comments?post=2124"}],"version-history":[{"count":1,"href":"https:\/\/lbajiele.com\/vi\/wp-json\/wp\/v2\/posts\/2124\/revisions"}],"predecessor-version":[{"id":2137,"href":"https:\/\/lbajiele.com\/vi\/wp-json\/wp\/v2\/posts\/2124\/revisions\/2137"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/lbajiele.com\/vi\/wp-json\/wp\/v2\/media\/1922"}],"wp:attachment":[{"href":"https:\/\/lbajiele.com\/vi\/wp-json\/wp\/v2\/media?parent=2124"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/lbajiele.com\/vi\/wp-json\/wp\/v2\/categories?post=2124"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/lbajiele.com\/vi\/wp-json\/wp\/v2\/tags?post=2124"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}