{"id":1411,"date":"2026-09-07T02:35:03","date_gmt":"2026-09-07T02:35:03","guid":{"rendered":"https:\/\/lanshanelectric.com\/?p=1411"},"modified":"2026-09-08T02:35:24","modified_gmt":"2026-09-08T02:35:24","slug":"phan-phoi-bien-ap-kich-thuoc-kva-huong-dan","status":"publish","type":"post","link":"https:\/\/lanshanelectric.com\/vi\/distribution-transformer-sizing-kva-guide\/","title":{"rendered":"K\u00edch th\u01b0\u1edbc m\u00e1y bi\u1ebfn \u00e1p ph\u00e2n ph\u1ed1i: Ngo\u00e0i c\u00f4ng th\u1ee9c kVA"},"content":{"rendered":"<p class=\"wp-block-paragraph\">K\u00edch th\u01b0\u1edbc bi\u1ebfn \u00e1p ph\u00e2n ph\u1ed1i b\u1eaft \u0111\u1ea7u v\u1edbi t\u1ea3i m\u1ed9t c\u01a1 s\u1edf s\u1ebd th\u1ef1c s\u1ef1 v\u1ebd, kh\u00f4ng ph\u1ea3i l\u00e0 s\u1ed1 l\u1edbn nh\u1ea5t trong danh s\u00e1ch thi\u1ebft b\u1ecb c\u1ee7a n\u00f3. m\u1ed9t t\u00ednh to\u00e1n h\u1eefu \u00edch ph\u1ea3i gi\u1ea3i th\u00edch nh\u1eefng g\u00ec ch\u1ea1y c\u00f9ng nhau, bao l\u00e2u \u0111\u1ec9nh cao k\u00e9o d\u00e0i v\u00e0 nh\u1eefng g\u00ec thay \u0111\u1ed5i khi s\u1ea3n xu\u1ea5t m\u1edf r\u1ed9ng.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u0110\u1ed1i v\u1edbi ng\u01b0\u1eddi mua d\u1ef1 \u00e1n, k\u00edch th\u01b0\u1edbc bi\u1ebfn \u00e1p ph\u00e2n ph\u1ed1i n\u00ean s\u1ea3n xu\u1ea5t nhi\u1ec1u h\u01a1n m\u1ed9t con s\u1ed1 kVA.\u0110\u00f3 l\u00e0 m\u1ed9t khuy\u1ebfn ngh\u1ecb c\u00f4ng su\u1ea5t v\u1edbi c\u00e1c gi\u1ea3 \u0111\u1ecbnh m\u00e0 m\u1ed9t k\u1ef9 s\u01b0 c\u00f3 th\u1ec3 ki\u1ec3m tra v\u00e0 m\u1ed9t nh\u00e0 cung c\u1ea5p c\u00f3 th\u1ec3 s\u1eed d\u1ee5ng. ph\u01b0\u01a1ng ph\u00e1p sau \u0111\u00e2y t\u00e1ch nhu c\u1ea7u b\u00ecnh th\u01b0\u1eddng, t\u0103ng tr\u01b0\u1edfng theo k\u1ebf ho\u1ea1ch v\u00e0 h\u1ea1n ch\u1ebf v\u1eadn h\u00e0nh thay v\u00ec \u1ea9n m\u1ecdi th\u1ee9 b\u00ean trong m\u1ed9t h\u1ec7 s\u1ed1 nh\u00e2n an to\u00e0n.<\/p>\n\n\n\n<div class=\"wp-block-rank-math-toc-block\" id=\"rank-math-toc\"><h2>M\u1ee5c l\u1ee5c<\/h2><nav><ul><li><a href=\"#what-does-distribution-transformer-sizing-involve\">K\u00edch th\u01b0\u1edbc bi\u1ebfn \u00e1p ph\u00e2n ph\u1ed1i li\u00ean quan \u0111\u1ebfn \u0111i\u1ec1u g\u00ec?<\/a><\/li><li><a href=\"#build-a-load-schedule-before-choosing-a-rating\">X\u00e2y d\u1ef1ng l\u1ecbch tr\u00ecnh t\u1ea3i tr\u01b0\u1edbc khi ch\u1ecdn x\u1ebfp h\u1ea1ng<\/a><\/li><li><a href=\"#use-the-correct-distribution-transformer-sizing-formula\">S\u1eed d\u1ee5ng C\u00f4ng th\u1ee9c \u0111\u1ecbnh c\u1ee1 m\u00e1y bi\u1ebfn \u00e1p ph\u00e2n ph\u1ed1i ch\u00ednh x\u00e1c<\/a><\/li><li><a href=\"#distinguish-connected-load-from-simultaneous-demand\">Ph\u00e2n bi\u1ec7t Connected Load v\u1edbi Simultaneous Demand<\/a><\/li><li><a href=\"#distribution-transformer-sizing-example-for-a-factory\">V\u00ed d\u1ee5 v\u1ec1 \u0111\u1ecbnh c\u1ee1 m\u00e1y bi\u1ebfn \u00e1p ph\u00e2n ph\u1ed1i cho nh\u00e0 m\u00e1y<\/a><\/li><li><a href=\"#how-much-spare-capacity-should-you-allow\">B\u1ea1n n\u00ean cho ph\u00e9p bao nhi\u00eau dung l\u01b0\u1ee3ng d\u1ef1 ph\u00f2ng?<\/a><\/li><li><a href=\"#check-motor-starting-separately-from-running-load\">Ki\u1ec3m tra Motor Starting Separately t\u1eeb Running Load<\/a><\/li><li><a href=\"#evaluate-harmonic-loads-before-finalizing-capacity\">\u0110\u00e1nh gi\u00e1 t\u1ea3i h\u00e0i h\u00f2a tr\u01b0\u1edbc khi ho\u00e0n thi\u1ec7n c\u00f4ng su\u1ea5t<\/a><\/li><li><a href=\"#account-for-temperature-cooling-and-load-duration\">T\u00e0i kho\u1ea3n Nhi\u1ec7t \u0111\u1ed9, L\u00e0m m\u00e1t v\u00e0 Th\u1eddi l\u01b0\u1ee3ng t\u1ea3i<\/a><\/li><li><a href=\"#review-impedance-and-the-downstream-equipment\">Xem l\u1ea1i Tr\u1edf kh\u00e1ng v\u00e0 Thi\u1ebft b\u1ecb h\u1ea1 ngu\u1ed3n<\/a><\/li><li><a href=\"#choosing-between-dry-type-and-oil-immersed-designs\">L\u1ef1a ch\u1ecdn gi\u1eefa thi\u1ebft k\u1ebf ki\u1ec3u kh\u00f4 v\u00e0 ng\u00e2m d\u1ea7u<\/a><\/li><li><a href=\"#what-to-send-with-a-transformer-enquiry\">G\u1eedi g\u00ec v\u1edbi y\u00eau c\u1ea7u v\u1ec1 m\u00e1y bi\u1ebfn \u00e1p<\/a><\/li><li><a href=\"#conclusion\">K\u1ebft lu\u1eadn<\/a><\/li><li><a href=\"#faq\">C\u00e2u h\u1ecfi th\u01b0\u1eddng g\u1eb7p<\/a><\/li><\/ul><\/nav><\/div>\n\n\n\n<h2 id=\"what-does-distribution-transformer-sizing-involve\" class=\"wp-block-heading\">K\u00edch th\u01b0\u1edbc bi\u1ebfn \u00e1p ph\u00e2n ph\u1ed1i li\u00ean quan \u0111\u1ebfn \u0111i\u1ec1u g\u00ec?<\/h2>\n\n\n\n<figure class=\"wp-block-image aligncenter size-full\"><img fetchpriority=\"high\" decoding=\"async\" width=\"800\" height=\"800\" src=\"https:\/\/lanshanelectric.com\/wp-content\/uploads\/2026\/08\/10kV-Oil-Immersed-Transformer-1.jpg\" alt=\"D\u1ea7u Immeded Transformer\" class=\"wp-image-807\" srcset=\"https:\/\/lanshanelectric.com\/wp-content\/uploads\/2026\/08\/10kV-Oil-Immersed-Transformer-1.jpg 800w, https:\/\/lanshanelectric.com\/wp-content\/uploads\/2026\/08\/10kV-Oil-Immersed-Transformer-1-300x300.jpg 300w, https:\/\/lanshanelectric.com\/wp-content\/uploads\/2026\/08\/10kV-Oil-Immersed-Transformer-1-150x150.jpg 150w, https:\/\/lanshanelectric.com\/wp-content\/uploads\/2026\/08\/10kV-Oil-Immersed-Transformer-1-768x768.jpg 768w, https:\/\/lanshanelectric.com\/wp-content\/uploads\/2026\/08\/10kV-Oil-Immersed-Transformer-1-600x600.jpg 600w, https:\/\/lanshanelectric.com\/wp-content\/uploads\/2026\/08\/10kV-Oil-Immersed-Transformer-1-100x100.jpg 100w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">K\u00edch th\u01b0\u1edbc m\u00e1y bi\u1ebfn \u00e1p ph\u00e2n ph\u1ed1i thi\u1ebft l\u1eadp c\u00f4ng su\u1ea5t n\u0103ng l\u01b0\u1ee3ng bi\u1ec3u ki\u1ebfn c\u1ea7n thi\u1ebft \u0111\u1ec3 cung c\u1ea5p t\u1ea3i \u0111i\u1ec7n x\u00e1c \u0111\u1ecbnh trong c\u00e1c \u0111i\u1ec1u ki\u1ec7n v\u1eadn h\u00e0nh \u0111\u01b0\u1ee3c ch\u1ec9 \u0111\u1ecbnh. Vi\u1ec7c chuy\u1ec3n \u0111\u1ed5i c\u01a1 b\u1ea3n r\u1ea5t \u0111\u01a1n gi\u1ea3n: chia nhu c\u1ea7u \u0111i\u1ec7n t\u00ednh b\u1eb1ng kW cho h\u1ec7 s\u1ed1 c\u00f4ng su\u1ea5t t\u01b0\u01a1ng \u1ee9ng \u0111\u1ec3 thu \u0111\u01b0\u1ee3c kVA. C\u00e1c&nbsp;<a href=\"https:\/\/energy.gov\/sites\/prod\/files\/2014\/04\/f15\/mc60405.pdf\" target=\"_blank\" rel=\"noopener\">Gi\u1ea3i th\u00edch c\u1ee7a B\u1ed9 N\u0103ng l\u01b0\u1ee3ng v\u1ec1 h\u1ec7 s\u1ed1 c\u00f4ng su\u1ea5t<\/a>&nbsp;m\u00f4 t\u1ea3 m\u1ed1i quan h\u1ec7 n\u00e0y gi\u1eefa s\u1ee9c m\u1ea1nh th\u1ef1c s\u1ef1 v\u00e0 r\u00f5 r\u00e0ng.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">S\u1ed1 k\u1ebft qu\u1ea3 l\u00e0 m\u1ed9t \u0111i\u1ec3m kh\u1edfi \u0111\u1ea7u. nhi\u1ec7m v\u1ee5 nhi\u1ec7t, hi\u1ec7u su\u1ea5t \u0111i\u1ec7n \u00e1p, kh\u1edfi \u0111\u1ed9ng \u0111\u1ed9ng c\u01a1 v\u00e0 m\u00f4i tr\u01b0\u1eddng c\u00e0i \u0111\u1eb7t c\u1ea7n s\u1ef1 ch\u00fa \u00fd ri\u00eang bi\u1ec7t. \u1ee9ng d\u1ee5ng m\u00e1y bi\u1ebfn \u00e1p IEC v\u00e0 h\u01b0\u1edbng d\u1eabn t\u1ea3i gi\u1ea3i quy\u1ebft c\u00e1c c\u00e2n nh\u1eafc d\u1ecbch v\u1ee5 r\u1ed9ng h\u01a1n n\u00e0y.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Do \u0111\u00f3, vi\u1ec7c xem x\u00e9t k\u00edch th\u01b0\u1edbc m\u00e1y bi\u1ebfn \u00e1p ph\u00e2n ph\u1ed1i th\u1ef1c t\u1ebf \u0111\u1eb7t ra hai c\u00e2u h\u1ecfi: m\u00e1y bi\u1ebfn \u00e1p ph\u1ea3i cung c\u1ea5p bao nhi\u00eau t\u1ea3i v\u00e0 trong nh\u1eefng \u0111i\u1ec1u ki\u1ec7n n\u00e0o n\u00f3 ph\u1ea3i cung c\u1ea5p?<\/p>\n\n\n\n<h2 id=\"build-a-load-schedule-before-choosing-a-rating\" class=\"wp-block-heading\">X\u00e2y d\u1ef1ng l\u1ecbch tr\u00ecnh t\u1ea3i tr\u01b0\u1edbc khi ch\u1ecdn x\u1ebfp h\u1ea1ng<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">B\u1eaft \u0111\u1ea7u v\u1edbi l\u1ecbch tr\u00ecnh hi\u1ec3n th\u1ecb t\u1eebng \u0111\u1ea7u v\u00e0o \u0111i\u1ec7n, \u0111i\u1ec7n \u00e1p, s\u1eafp x\u1ebfp pha, gi\u1edd ho\u1ea1t \u0111\u1ed9ng v\u00e0 \u0111\u00f3ng g\u00f3p d\u1ef1 ki\u1ebfn c\u1ee7a t\u1ea3i trong \u0111i\u1ec1u ki\u1ec7n ho\u1ea1t \u0111\u1ed9ng b\u1eadn r\u1ed9n nh\u1ea5t. d\u00e1n nh\u00e3n m\u1ecdi gi\u00e1 tr\u1ecb \u0111\u01b0\u1ee3c \u0111o, thi\u1ebft b\u1ecb \u0111\u01b0\u1ee3c ch\u1ec9 \u0111\u1ecbnh ho\u1eb7c gi\u1ea3 \u0111\u1ecbnh.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u0110\u1ed1i v\u1edbi m\u1ed9t c\u01a1 s\u1edf hi\u1ec7n c\u00f3, y\u00eau c\u1ea7u nhu c\u1ea7u v\u00e0 h\u1ed3 s\u01a1 h\u1ec7 s\u1ed1 c\u00f4ng su\u1ea5t ph\u00f9 h\u1ee3p v\u1edbi th\u1eddi gian bao g\u1ed3m s\u1ea3n xu\u1ea5t \u0111\u1ea1i di\u1ec7n v\u00e0 \u0111i\u1ec1u ki\u1ec7n theo m\u00f9a.\u0110\u1ed1i v\u1edbi m\u1ed9t c\u01a1 s\u1edf m\u1edbi, y\u00eau c\u1ea7u ch\u1ee7 s\u1edf h\u1eefu quy tr\u00ecnh x\u00e1c nh\u1eadn m\u00e1y n\u00e0o ho\u1ea1t \u0111\u1ed9ng c\u00f9ng nhau.M\u1ed9t danh s\u00e1ch c\u00e1c thi\u1ebft b\u1ecb \u0111\u01b0\u1ee3c c\u00e0i \u0111\u1eb7t l\u00e0 h\u1eefu \u00edch, nh\u01b0ng n\u00f3 ch\u01b0a ph\u1ea3i l\u00e0 m\u1ed9t k\u1ecbch b\u1ea3n ho\u1ea1t \u0111\u1ed9ng.<\/p>\n\n\n\n<h3 id=\"separate-motor-output-from-electrical-input\" class=\"wp-block-heading\">\u0110\u1ea7u ra \u0111\u1ed9ng c\u01a1 ri\u00eang bi\u1ec7t v\u1edbi \u0111\u1ea7u v\u00e0o \u0111i\u1ec7n<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">X\u1ebfp h\u1ea1ng \u0111\u1ea7u ra tr\u1ee5c c\u1ee7a \u0111\u1ed9ng c\u01a1 kh\u00f4ng ph\u1ea3i l\u00e0 \u0111\u1ea7u v\u00e0o \u0111i\u1ec7n c\u1ee7a n\u00f3.Khi \u01b0\u1edbc t\u00ednh \u0111\u1ea7u v\u00e0o t\u1eeb c\u00f4ng su\u1ea5t tr\u1ee5c, chia cho hi\u1ec7u su\u1ea5t \u0111\u1ed9ng c\u01a1 t\u1ea1i \u0111i\u1ec3m v\u1eadn h\u00e0nh c\u00f3 li\u00ean quan.C\u00e1c DOE&nbsp;<a href=\"https:\/\/energy.gov\/sites\/prod\/files\/2014\/04\/f15\/10097517.pdf\" target=\"_blank\" rel=\"noopener\">t\u1ea3i \u0111\u1ed9ng c\u01a1 v\u00e0 h\u01b0\u1edbng d\u1eabn hi\u1ec7u qu<\/a>&nbsp;gi\u1ea3i th\u00edch s\u1ef1 kh\u00e1c bi\u1ec7t n\u00e0y. kh\u00f4ng \u00e1p d\u1ee5ng \u0111i\u1ec1u ch\u1ec9nh hi\u1ec7u qu\u1ea3 \u0111\u00f3 m\u1ed9t l\u1ea7n n\u1eefa khi l\u1ecbch tr\u00ecnh \u0111\u00e3 ch\u1ee9a \u0111\u1ea7u v\u00e0o \u0111i\u1ec7n \u0111o \u0111\u01b0\u1ee3c.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">S\u1ef1 kh\u00e1c bi\u1ec7t n\u00e0y quan tr\u1ecdng trong vi\u1ec7c \u0111\u1ecbnh c\u1ee1 m\u00e1y bi\u1ebfn \u00e1p ph\u00e2n ph\u1ed1i v\u00ec tr\u1ee5c tr\u1ed9n kW v\u00e0 kW \u0111i\u1ec7n l\u00e0m cho t\u1ed5ng s\u1ed1 kh\u00f4ng nh\u1ea5t qu\u00e1n tr\u01b0\u1edbc khi \u00e1p d\u1ee5ng b\u1ea5t k\u1ef3 h\u1ec7 s\u1ed1 nhu c\u1ea7u n\u00e0o.<\/p>\n\n\n\n<h2 id=\"use-the-correct-distribution-transformer-sizing-formula\" class=\"wp-block-heading\">S\u1eed d\u1ee5ng C\u00f4ng th\u1ee9c \u0111\u1ecbnh c\u1ee1 m\u00e1y bi\u1ebfn \u00e1p ph\u00e2n ph\u1ed1i ch\u00ednh x\u00e1c<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u0110\u1ec3 \u0111\u1ecbnh c\u1ee1 m\u00e1y bi\u1ebfn \u00e1p ph\u00e2n ph\u1ed1i d\u1ef1a tr\u00ean nhu c\u1ea7u \u0111i\u1ec7n v\u00e0 h\u1ec7 s\u1ed1 c\u00f4ng su\u1ea5t t\u1ed5ng h\u1ee3p th\u00edch h\u1ee3p:<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>C\u00f4ng su\u1ea5t bi\u1ec3u ki\u1ebfn (kVA) = nhu c\u1ea7u (kW) \u00f7 h\u1ec7 s\u1ed1 c\u00f4ng su\u1ea5t<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">S\u1eed d\u1ee5ng h\u1ec7 s\u1ed1 c\u00f4ng su\u1ea5t l\u00e0m s\u1ed1 th\u1eadp ph\u00e2n. trong tr\u01b0\u1eddng h\u1ee3p minh h\u1ecda, 400 kW \u1edf h\u1ec7 s\u1ed1 c\u00f4ng su\u1ea5t 0,90 \u0111\u1ea1i di\u1ec7n cho 444,4 kVA. Vi\u1ec7c chuy\u1ec3n \u0111\u1ed5i tu\u00e2n theo \u0111\u1ecbnh ngh\u0129a v\u1ec1 h\u1ec7 s\u1ed1 c\u00f4ng su\u1ea5t; n\u00f3 ch\u01b0a bao g\u1ed3m c\u00e1c b\u1ed5 sung trong t\u01b0\u01a1ng lai ho\u1eb7c thi\u1ebft l\u1eadp m\u1ed9t nhi\u1ec7m v\u1ee5 nhi\u1ec7t c\u00f3 th\u1ec3 ch\u1ea5p nh\u1eadn \u0111\u01b0\u1ee3c.<\/p>\n\n\n\n<h3 id=\"calculating-from-voltage-and-current\" class=\"wp-block-heading\">T\u00ednh to\u00e1n t\u1eeb \u0110i\u1ec7n \u00e1p v\u00e0 D\u00f2ng \u0111i\u1ec7n<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u0110\u1ed1i v\u1edbi t\u1ea3i ba pha c\u00e2n b\u1eb1ng:<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>kVA = \u221a3 \u00d7 \u0111i\u1ec7n \u00e1p \u0111\u01b0\u1eddng d\u00e2y (V) \u00d7 d\u00f2ng \u0111i\u1ec7n (A) \u00f7 1.000<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">S\u1eed d\u1ee5ng \u0111i\u1ec7n \u00e1p \u0111\u01b0\u1eddng d\u00e2y, kh\u00f4ng ph\u1ea3i \u0111i\u1ec7n \u00e1p \u0111\u01b0\u1eddng d\u00e2y trung t\u00ednh. bi\u1ec3u th\u1ee9c n\u00e0y tu\u00e2n theo m\u1ed1i quan h\u1ec7 c\u00f4ng su\u1ea5t ba pha \u0111\u01b0\u1ee3c tr\u00ecnh b\u00e0y trong h\u01b0\u1edbng d\u1eabn \u0111\u1ed9ng c\u01a1 DOE. N\u01a1i t\u1ea3i pha kh\u00f4ng c\u00e2n b\u1eb1ng \u0111\u00e1ng k\u1ec3, c\u00f3 k\u1ef9 s\u01b0 \u0111\u00e1nh gi\u00e1 c\u00e1c pha ri\u00eang l\u1ebb thay v\u00ec ch\u1ec9 d\u1ef1a v\u00e0o x\u1ea5p x\u1ec9 t\u1ea3i c\u00e2n b\u1eb1ng.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Khi c\u00e1c ph\u00e9p \u0111o hi\u1ec7n t\u1ea1i \u0111\u00e3 thi\u1ebft l\u1eadp kVA, \u0111\u1eebng chia k\u1ebft qu\u1ea3 \u0111\u00f3 cho h\u1ec7 s\u1ed1 c\u00f4ng su\u1ea5t m\u1ed9t l\u1ea7n n\u1eefa. \u0110i\u1ec1u \u0111\u00f3 s\u1ebd l\u1eb7p l\u1ea1i vi\u1ec7c chuy\u1ec3n \u0111\u1ed5i m\u1ed9t c\u00e1ch kh\u00f4ng c\u1ea7n thi\u1ebft.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u0110\u1ed1i v\u1edbi t\u1ea3i h\u1ed7n h\u1ee3p, s\u1eed d\u1ee5ng h\u1ec7 s\u1ed1 c\u00f4ng su\u1ea5t t\u1ed5ng h\u1ee3p t\u01b0\u01a1ng \u1ee9ng v\u1edbi nhu c\u1ea7u k\u1ebft h\u1ee3p. m\u1ed9t trung b\u00ecnh s\u1ed1 h\u1ecdc c\u1ee7a c\u00e1c y\u1ebfu t\u1ed1 c\u00f4ng su\u1ea5t thi\u1ebft b\u1ecb kh\u00f4ng ph\u1ea3i l\u00e0 m\u1ed9t thay th\u1ebf th\u00edch h\u1ee3p.\u0110\u1ed1i v\u1edbi k\u00edch th\u01b0\u1edbc bi\u1ebfn \u00e1p ph\u00e2n ph\u1ed1i, nhu c\u1ea7u v\u00e0 h\u1ec7 s\u1ed1 c\u00f4ng su\u1ea5t ph\u1ea3i m\u00f4 t\u1ea3 c\u00f9ng m\u1ed9t \u0111i\u1ec1u ki\u1ec7n ho\u1ea1t \u0111\u1ed9ng; n\u1ebfu kh\u00f4ng, th\u01b0\u01a1ng s\u1ed1 k\u1ebft h\u1ee3p c\u00e1c \u0111\u1ea7u v\u00e0o kh\u00f4ng li\u00ean quan.<\/p>\n\n\n\n<h2 id=\"distinguish-connected-load-from-simultaneous-demand\" class=\"wp-block-heading\">Ph\u00e2n bi\u1ec7t Connected Load v\u1edbi Simultaneous Demand<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Nhu c\u1ea7u y\u1ebfu t\u1ed1 so s\u00e1nh nhu c\u1ea7u t\u1ed1i \u0111a v\u1edbi t\u1ea3i k\u1ebft n\u1ed1i. n\u00f3 kh\u00f4ng ph\u1ea3i l\u00e0 m\u1ed9t ph\u1ee5 c\u1ea5p mi\u1ec5n ph\u00ed \u0111\u1ec3 lo\u1ea1i b\u1ecf c\u00f4ng su\u1ea5t t\u1eeb m\u1ed9t l\u1ecbch tr\u00ecnh.&nbsp;<a href=\"https:\/\/www.mdpi.com\/2673-4826\/3\/3\/22\" target=\"_blank\" rel=\"noopener\">Nghi\u00ean c\u1ee9u ph\u00e1t tri\u1ec3n y\u1ebfu t\u1ed1 nhu c\u1ea7u<\/a>&nbsp;minh h\u1ecda t\u1ea1i sao h\u00e0nh vi v\u1eadn h\u00e0nh v\u00e0 t\u1ed5ng th\u1ec3 t\u1ea3i \u0111\u01b0\u1ee3c k\u1ebft n\u1ed1i l\u1ea1i quan tr\u1ecdng khi thi\u1ebft l\u1eadp c\u00e1c y\u1ebfu t\u1ed1 \u0111\u00f3.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Trong b\u1ea3ng t\u00ednh \u0111\u1ecbnh c\u1ee1 m\u00e1y bi\u1ebfn \u00e1p ph\u00e2n ph\u1ed1i c\u1ee7a b\u1ea1n, h\u00e3y n\u00eau ch\u00ednh x\u00e1c nh\u1eefng g\u00ec m\u1ed7i h\u1ec7 s\u1ed1 nh\u00e2n \u0111\u1ea1i di\u1ec7n. n\u00f3 c\u00f3 t\u00ednh \u0111\u1ebfn m\u1ed9t m\u00e1y ho\u1ea1t \u0111\u1ed9ng d\u01b0\u1edbi \u0111\u1ea7u v\u00e0o \u0111\u01b0\u1ee3c x\u1ebfp h\u1ea1ng, \u00edt m\u00e1y ch\u1ea1y c\u00f9ng nhau h\u01a1n ho\u1eb7c c\u1ea3 hai kh\u00f4ng?Tr\u00e1nh \u00e1p d\u1ee5ng m\u1ed9t m\u1ee9c gi\u1ea3m r\u1ed9ng kh\u00e1c sau khi l\u1ecbch tr\u00ecnh \u0111\u00e3 \u0111\u1ea1i di\u1ec7n cho nhu c\u1ea7u \u0111\u1ed3ng th\u1eddi.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Xem x\u00e9t hai m\u00e1y b\u01a1m qu\u00e1 tr\u00ecnh d\u1ef1 \u0111\u1ecbnh thay th\u1ebf. x\u00e1c nh\u1eadn xem ch\u00fang c\u00f3 th\u1ec3 ch\u1ed3ng ch\u00e9o trong qu\u00e1 tr\u00ecnh chuy\u1ec3n \u0111\u1ed5i hay \u0111i\u1ec1u ki\u1ec7n ho\u1ea1t \u0111\u1ed9ng b\u1ea5t th\u01b0\u1eddng. t\u01b0\u01a1ng t\u1ef1 nh\u01b0 v\u1eady, h\u00e3y h\u1ecfi xem t\u1ea3i s\u01b0\u1edfi \u1ea5m, th\u00f4ng gi\u00f3 v\u00e0 s\u1ea3n xu\u1ea5t c\u00f3 tr\u00f9ng kh\u1edbp trong m\u00f9a \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 thi\u1ebft k\u1ebf hay kh\u00f4ng.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Ghi l\u1ea1i tr\u01b0\u1eddng h\u1ee3p ho\u1ea1t \u0111\u1ed9ng b\u00ean c\u1ea1nh t\u00ednh to\u00e1n. \u201cBa \u00f4 s\u1ea3n xu\u1ea5t \u0111ang ch\u1ea1y, m\u1ed9t \u00f4 \u1edf ch\u1ebf \u0111\u1ed9 ch\u1edd\u201d h\u1eefu \u00edch h\u01a1n m\u1ed9t y\u1ebfu t\u1ed1 kh\u00f4ng gi\u1ea3i th\u00edch \u0111\u01b0\u1ee3c sao ch\u00e9p t\u1eeb m\u1ed9t c\u01a1 s\u1edf kh\u00e1c.<\/p>\n\n\n\n<h2 id=\"distribution-transformer-sizing-example-for-a-factory\" class=\"wp-block-heading\">V\u00ed d\u1ee5 v\u1ec1 \u0111\u1ecbnh c\u1ee1 m\u00e1y bi\u1ebfn \u00e1p ph\u00e2n ph\u1ed1i cho nh\u00e0 m\u00e1y<\/h2>\n\n\n\n<figure class=\"wp-block-image aligncenter size-full\"><img decoding=\"async\" width=\"800\" height=\"800\" src=\"https:\/\/lanshanelectric.com\/wp-content\/uploads\/2026\/08\/10kV-Dry-Type-Transformer-1.jpg\" alt=\"M\u00e1y bi\u1ebfn \u00e1p lo\u1ea1i kh\u00f4 10kV\" class=\"wp-image-806\" srcset=\"https:\/\/lanshanelectric.com\/wp-content\/uploads\/2026\/08\/10kV-Dry-Type-Transformer-1.jpg 800w, https:\/\/lanshanelectric.com\/wp-content\/uploads\/2026\/08\/10kV-Dry-Type-Transformer-1-300x300.jpg 300w, https:\/\/lanshanelectric.com\/wp-content\/uploads\/2026\/08\/10kV-Dry-Type-Transformer-1-150x150.jpg 150w, https:\/\/lanshanelectric.com\/wp-content\/uploads\/2026\/08\/10kV-Dry-Type-Transformer-1-768x768.jpg 768w, https:\/\/lanshanelectric.com\/wp-content\/uploads\/2026\/08\/10kV-Dry-Type-Transformer-1-600x600.jpg 600w, https:\/\/lanshanelectric.com\/wp-content\/uploads\/2026\/08\/10kV-Dry-Type-Transformer-1-100x100.jpg 100w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">H\u00e3y xem x\u00e9t m\u1ed9t nh\u00e0 m\u00e1y gi\u1ea3 \u0111\u1ecbnh v\u1edbi m\u1ed9t \u0111\u1ec1 xu\u1ea5t 10 kV\/400 V, cung c\u1ea5p ba pha. t\u1ea5t c\u1ea3 c\u00e1c gi\u00e1 tr\u1ecb d\u01b0\u1edbi \u0111\u00e2y l\u00e0 \u0111\u1ea7u v\u00e0o \u0111i\u1ec7n minh h\u1ecda, kh\u00f4ng ph\u1ea3i l\u00e0 m\u1ed9t d\u1ef1 \u00e1n Lanshan ho\u1eb7c \u0111\u00e1nh gi\u00e1 s\u1ea3n ph\u1ea9m \u0111\u01b0\u1ee3c \u0111\u1ea3m b\u1ea3o.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">C\u1ed9t nhu c\u1ea7u \u0111\u1ea1i di\u1ec7n cho s\u1ef1 \u0111\u00f3ng g\u00f3p c\u1ee7a m\u1ed7i nh\u00f3m trong c\u00f9ng m\u1ed9t giai \u0111o\u1ea1n ho\u1ea1t \u0111\u1ed9ng b\u1eadn r\u1ed9n gi\u1ea3 \u0111\u1ecbnh.N\u00f3 kh\u00f4ng ph\u1ea3i l\u00e0 m\u1ed9t t\u1eadp h\u1ee3p c\u00e1c \u0111\u1ec9nh ri\u00eang l\u1ebb kh\u00f4ng li\u00ean quan.<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th class=\"has-text-align-left\" data-align=\"left\">Nh\u00f3m t\u1ea3i<\/th><th class=\"has-text-align-left\" data-align=\"left\">T\u1ea3i \u0111i\u1ec7n k\u1ebft n\u1ed1i<\/th><th class=\"has-text-align-left\" data-align=\"left\">Gi\u1ea3 \u0111\u1ecbnh nhu c\u1ea7u \u0111\u1ed3ng th\u1eddi<\/th><th class=\"has-text-align-left\" data-align=\"left\">C\u01a1 s\u1edf c\u1ea7n x\u00e1c nh\u1eadn<\/th><\/tr><\/thead><tbody><tr><td class=\"has-text-align-left\" data-align=\"left\">M\u00e1y m\u00f3c s\u1ea3n xu\u1ea5t<\/td><td class=\"has-text-align-left\" data-align=\"left\">240 kW<\/td><td class=\"has-text-align-left\" data-align=\"left\">180 kW<\/td><td class=\"has-text-align-left\" data-align=\"left\">K\u1ebft h\u1ee3p s\u1ea3n xu\u1ea5t theo l\u1ecbch tr\u00ecnh<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">L\u00e0m m\u00e1t v\u00e0 th\u00f4ng gi\u00f3<\/td><td class=\"has-text-align-left\" data-align=\"left\">120 kW<\/td><td class=\"has-text-align-left\" data-align=\"left\">96 kW<\/td><td class=\"has-text-align-left\" data-align=\"left\">Ho\u1ea1t \u0111\u1ed9ng theo m\u00f9a thi\u1ebft k\u1ebf<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">Gia nhi\u1ec7t qu\u00e1 tr\u00ecnh<\/td><td class=\"has-text-align-left\" data-align=\"left\">90 kW<\/td><td class=\"has-text-align-left\" data-align=\"left\">72 kW<\/td><td class=\"has-text-align-left\" data-align=\"left\">Nhi\u1ec7m v\u1ee5 s\u01b0\u1edfi \u1ea5m trong qu\u00e1 tr\u00ecnh s\u1ea3n xu\u1ea5t<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">Chi\u1ebfu s\u00e1ng<\/td><td class=\"has-text-align-left\" data-align=\"left\">40 kW<\/td><td class=\"has-text-align-left\" data-align=\"left\">32 kW<\/td><td class=\"has-text-align-left\" data-align=\"left\">C\u00e1c khu v\u1ef1c s\u1ea3n xu\u1ea5t b\u1ecb chi\u1ebfm \u0111\u00f3ng<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">C\u00f4ng su\u1ea5t nh\u1ecf v\u00e0 ph\u1ee5 tr\u1ee3<\/td><td class=\"has-text-align-left\" data-align=\"left\">30 kW<\/td><td class=\"has-text-align-left\" data-align=\"left\">20 kW<\/td><td class=\"has-text-align-left\" data-align=\"left\">D\u1ef1 ki\u1ebfn s\u1eed d\u1ee5ng \u0111\u1ed3ng th\u1eddi<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">T\u1ed5ng c\u1ed9ng<\/td><td class=\"has-text-align-left\" data-align=\"left\">520 kW<\/td><td class=\"has-text-align-left\" data-align=\"left\">400 kW<\/td><td class=\"has-text-align-left\" data-align=\"left\">M\u1ed9t k\u1ecbch b\u1ea3n v\u1eadn h\u00e0nh ph\u1ed1i h\u1ee3p<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h3 id=\"calculate-the-present-requirement\" class=\"wp-block-heading\">T\u00ednh to\u00e1n y\u00eau c\u1ea7u hi\u1ec7n t\u1ea1i<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Gi\u1ea3 s\u1eed h\u1ec7 s\u1ed1 c\u00f4ng su\u1ea5t t\u1ed5ng h\u1ee3p trong giai \u0111o\u1ea1n n\u00e0y l\u00e0 0,90:<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Nhu c\u1ea7u bi\u1ec3u ki\u1ebfn hi\u1ec7n t\u1ea1i = 400 \u00f7 0,90 = 444,4 kVA<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">H\u1ec7 s\u1ed1 nhu c\u1ea7u ng\u1ee5 \u00fd l\u00e0 400 \u00f7 520, ho\u1eb7c x\u1ea5p x\u1ec9 0,77. gi\u00e1 tr\u1ecb \u0111\u00f3 m\u00f4 t\u1ea3 l\u1ecbch tr\u00ecnh \u0111\u01b0\u1ee3c ph\u00e1t minh n\u00e0y; n\u00f3 kh\u00f4ng ph\u1ea3i l\u00e0 m\u1ed9t y\u1ebfu t\u1ed1 nhu c\u1ea7u nh\u00e0 m\u00e1y \u0111\u01b0\u1ee3c \u0111\u1ec1 ngh.<\/p>\n\n\n\n<h3 id=\"add-an-identified-expansion\" class=\"wp-block-heading\">Th\u00eam m\u1ed9t Identified Expansion<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Gi\u1ea3 s\u1eed m\u1ed9t quy tr\u00ecnh b\u1ed5 sung \u0111\u01b0\u1ee3c ph\u00ea duy\u1ec7t s\u1ebd \u0111\u00f3ng g\u00f3p 60 kW trong c\u00f9ng th\u1eddi k\u1ef3 cao \u0111i\u1ec3m v\u00e0 h\u1ec7 s\u1ed1 c\u00f4ng su\u1ea5t t\u1ed5ng h\u1ee3p trong t\u01b0\u01a1ng lai v\u1eabn l\u00e0 0,90:<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Nhu c\u1ea7u bi\u1ec3u ki\u1ebfn trong t\u01b0\u01a1ng lai = (400 + 60) \u00f7 0,90 = 511,1 kVA<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">T\u00ednh to\u00e1n k\u00edch th\u01b0\u1edbc bi\u1ebfn \u00e1p ph\u00e2n ph\u1ed1i n\u00e0y b\u00e2y gi\u1edd ph\u00e2n bi\u1ec7t y\u00eau c\u1ea7u hi\u1ec7n t\u1ea1i v\u1edbi m\u1ed9t m\u1edf r\u1ed9ng x\u00e1c \u0111\u1ecbnh. kh\u00f4ng c\u1ea7n ph\u1ea3i \u0111\u1ebfm l\u1ea1i m\u1edf r\u1ed9ng \u0111\u00f3 c\u00f9ng m\u1ed9t b\u00ean trong m\u1ed9t tr\u1ee3 c\u1ea5p t\u0103ng tr\u01b0\u1edfng kh\u00e1c.<\/p>\n\n\n\n<h3 id=\"evaluate-a-candidate-rating\" class=\"wp-block-heading\">\u0110\u00e1nh gi\u00e1 x\u1ebfp h\u1ea1ng \u1ee9ng vi\u00ean<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Gi\u1ea3 s\u1eed m\u1ed9t nh\u00e0 cung c\u1ea5p cung c\u1ea5p m\u1ed9t c\u1ea5u h\u00ecnh 630 kVA ph\u00f9 h\u1ee3p. nhu c\u1ea7u trong t\u01b0\u01a1ng lai \u0111\u01b0\u1ee3c t\u00ednh to\u00e1n s\u1ebd b\u1eb1ng kho\u1ea3ng 81.1% c\u1ee7a x\u1ebfp h\u1ea1ng \u0111\u00f3. \u1edf 400 V, d\u00f2ng t\u1ea3i ba pha c\u00e2n b\u1eb1ng s\u1ebd l\u00e0 kho\u1ea3ng 738 A.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Nh\u1eefng s\u1ed1 li\u1ec7u \u0111\u00f3 bi\u1ec7n minh cho vi\u1ec7c \u0111\u00e1nh gi\u00e1 th\u00eam, kh\u00f4ng ph\u1ea3i ph\u00ea duy\u1ec7t t\u1ef1 \u0111\u1ed9ng.\u1ee8ng vi\u00ean v\u1eabn c\u1ea7n ki\u1ec3m tra nhi\u1ec7t, h\u00e0i h\u00f2a, kh\u1edfi \u0111\u1ed9ng \u0111\u1ed9ng c\u01a1, m\u1ee9c \u0111\u1ed9 l\u1ed7i v\u00e0 c\u00e0i \u0111\u1eb7t. t\u00ednh kh\u1ea3 d\u1ee5ng v\u00e0 \u0111\u1eb7c \u0111i\u1ec3m c\u1ee5 th\u1ec3 c\u1ee7a d\u1ef1 \u00e1n c\u0169ng ph\u1ea3i \u0111\u01b0\u1ee3c x\u00e1c nh\u1eadn.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Nh\u01b0 m\u1ed9t ki\u1ec3m tra \u0111\u1ed9 nh\u1ea1y, c\u00f9ng 460 kW t\u1ea1i 0,80 h\u1ec7 s\u1ed1 c\u00f4ng su\u1ea5t tr\u1edf th\u00e0nh 575 kVA. \u0111i\u1ec1u n\u00e0y ch\u1ee9ng minh l\u00e0m th\u1ebf n\u00e0o m\u1ed9t \u0111\u1ea7u v\u00e0o kh\u00f4ng ch\u1eafc ch\u1eafn c\u00f3 th\u1ec3 thay \u0111\u1ed5i \u0111\u00e1ng k\u1ec3 k\u00edch th\u01b0\u1edbc m\u00e1y bi\u1ebfn \u00e1p ph\u00e2n ph\u1ed1i m\u00e0 kh\u00f4ng c\u1ea7n th\u00eam b\u1ea5t k\u1ef3 m\u00e1y m\u00f3c m\u1edbi n\u00e0o.<\/p>\n\n\n\n<h2 id=\"how-much-spare-capacity-should-you-allow\" class=\"wp-block-heading\">B\u1ea1n n\u00ean cho ph\u00e9p bao nhi\u00eau dung l\u01b0\u1ee3ng d\u1ef1 ph\u00f2ng?<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Ba quy\u1ebft \u0111\u1ecbnh ri\u00eang bi\u1ec7t: nhu c\u1ea7u trong t\u01b0\u01a1ng lai \u0111\u01b0\u1ee3c x\u00e1c nh\u1eadn, s\u1ef1 kh\u00f4ng ch\u1eafc ch\u1eafn trong \u01b0\u1edbc t\u00ednh t\u1ea3i v\u00e0 kho\u1ea3ng kh\u00f4ng ho\u1ea1t \u0111\u1ed9ng \u01b0a th\u00edch c\u1ee7a ch\u1ee7 s\u1edf h\u1eefu.Gi\u1eef ch\u00fang hi\u1ec3n th\u1ecb gi\u00fap \u0111\u1ec1 xu\u1ea5t c\u00f4ng su\u1ea5t d\u1ec5 xem x\u00e9t h\u01a1n.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u0110\u1ed1i v\u1edbi k\u00edch th\u01b0\u1edbc m\u00e1y bi\u1ebfn \u00e1p ph\u00e2n ph\u1ed1i, vi\u1ec7c b\u1ed5 sung m\u00e1y \u0111\u01b0\u1ee3c ph\u00ea duy\u1ec7t l\u00e0 b\u1eb1ng ch\u1ee9ng m\u1ea1nh m\u1ebd h\u01a1n t\u1ef7 l\u1ec7 ph\u1ea7n tr\u0103m ch\u0103n. ghi l\u1ea1i ng\u00e0y v\u1eadn h\u00e0nh c\u00f3 th\u1ec3 c\u1ee7a n\u00f3, \u0111\u1ea7u v\u00e0o \u0111i\u1ec7n v\u00e0 ch\u1ed3ng ch\u00e9o v\u1edbi t\u1ea3i hi\u1ec7n c\u00f3. x\u1eed l\u00fd \u00edt ph\u00e1t tri\u1ec3n nh\u1ea5t \u0111\u1ecbnh nh\u01b0 m\u1ed9t k\u1ecbch b\u1ea3n ri\u00eang bi\u1ec7t h\u01a1n l\u00e0 \u00e2m th\u1ea7m gi\u1ea3 \u0111\u1ecbnh t\u1ea5t c\u1ea3 s\u1ebd x\u1ea3y ra.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">C\u0169ng ph\u00e2n bi\u1ec7t c\u00f4ng su\u1ea5t d\u1ef1 ph\u00f2ng t\u1eeb d\u1ef1 ph\u00f2ng. m\u1ed9t m\u00e1y bi\u1ebfn \u00e1p \u0111\u01a1n l\u1edbn h\u01a1n kh\u00f4ng cung c\u1ea5p \u0111\u01b0\u1eddng d\u1eabn cung c\u1ea5p th\u1ee9 hai. n\u01a1i ph\u1ea3i ch\u1ecbu s\u1ef1 c\u1ed1 m\u1ea5t \u0111i\u1ec7n, h\u00e3y y\u00eau c\u1ea7u k\u1ef9 s\u01b0 \u0111\u00e1nh gi\u00e1 ngu\u1ed3n cung c\u1ea5p c\u00f2n l\u1ea1i v\u00e0 t\u1ea3i tr\u1ecdng thi\u1ebft y\u1ebfu v\u1edbi m\u1ed9t \u0111\u01a1n v\u1ecb kh\u00f4ng c\u00f3 s\u1eb5n.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Kh\u00f4ng gi\u1ea3 s\u1eed m\u1ed9t \u0111\u00e1nh gi\u00e1 l\u1edbn h\u01a1n l\u00e0 t\u1ef1 \u0111\u1ed9ng hi\u1ec7u qu\u1ea3 h\u01a1n. t\u1ed5n th\u1ea5t m\u00e1y bi\u1ebfn \u00e1p bao g\u1ed3m m\u1ed9t th\u00e0nh ph\u1ea7n c\u00f3 m\u1eb7t b\u1ea5t c\u1ee9 khi n\u00e0o c\u00e1c \u0111\u01a1n v\u1ecb \u0111\u01b0\u1ee3c c\u1ea5p \u0111i\u1ec7n v\u00e0 m\u1ed9t th\u00e0nh ph\u1ea7n thay \u0111\u1ed5i v\u1edbi t\u1ea3i. c\u00e1c&nbsp;<a href=\"https:\/\/www.energy.gov\/documents\/transformers-buyers-guidefinal10-16-17pdf\" target=\"_blank\" rel=\"noopener\">h\u01b0\u1edbng d\u1eabn hi\u1ec7u su\u1ea5t m\u00e1y bi\u1ebfn \u00e1p ph\u00e2n ph\u1ed1i do DOE ch\u1ee7 tr\u00ec<\/a>&nbsp;gi\u1ea3i th\u00edch t\u1ea1i sao h\u1ed3 s\u01a1 t\u1ea3i d\u1ef1 \u0111\u1ecbnh quan tr\u1ecdng.<\/p>\n\n\n\n<h2 id=\"check-motor-starting-separately-from-running-load\" class=\"wp-block-heading\">Ki\u1ec3m tra Motor Starting Separately t\u1eeb Running Load<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Kh\u1edfi \u0111\u1ed9ng \u0111\u1ed9ng c\u01a1 c\u00f3 th\u1ec3 \u00e1p \u0111\u1eb7t c\u00e1c \u0111i\u1ec1u ki\u1ec7n d\u00f2ng \u0111i\u1ec7n v\u00e0 \u0111i\u1ec7n \u00e1p r\u01a1i m\u00e0 ph\u00e9p t\u00ednh kVA \u1edf tr\u1ea1ng th\u00e1i \u1ed5n \u0111\u1ecbnh kh\u00f4ng m\u00f4 t\u1ea3.&nbsp;<a href=\"https:\/\/standards.ieee.org\/ieee\/3002.7\/4435\/\" target=\"_blank\" rel=\"noopener\">IEEE 3002.7<\/a>&nbsp;\u0111\u1ec1 c\u1eadp \u0111\u1ebfn c\u00e1c nghi\u00ean c\u1ee9u kh\u1edfi \u0111\u1ed9ng \u0111\u1ed9ng c\u01a1, bao g\u1ed3m nh\u1eefng t\u00e1c \u0111\u1ed9ng n\u00e0y v\u00e0 t\u1ea7m quan tr\u1ecdng c\u1ee7a c\u00e1c gi\u1ea3 \u0111\u1ecbnh v\u1ec1 m\u00f4 h\u00ecnh h\u1ec7 th\u1ed1ng.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u0110\u1ed1i v\u1edbi k\u00edch th\u01b0\u1edbc m\u00e1y bi\u1ebfn \u00e1p ph\u00e2n ph\u1ed1i, thu th\u1eadp ph\u01b0\u01a1ng ph\u00e1p kh\u1edfi \u0111\u1ed9ng c\u1ee7a \u0111\u1ed9ng c\u01a1 l\u1edbn nh\u1ea5t, d\u1eef li\u1ec7u d\u00f2ng kh\u1edfi \u0111\u1ed9ng, y\u00eau c\u1ea7u t\u0103ng t\u1ed1c v\u00e0 kh\u1edfi \u0111\u1ed9ng m\u1ed7i gi\u1edd. x\u00e1c \u0111\u1ecbnh c\u00e1c t\u1ea3i kh\u00e1c d\u1ef1 ki\u1ebfn s\u1ebd ch\u1ea1y khi n\u00f3 b\u1eaft \u0111\u1ea7u.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Y\u00eau c\u1ea7u k\u1ef9 s\u01b0 \u0111\u00e1nh gi\u00e1 \u0111i\u1ec7n \u00e1p \u0111\u1ea7u cu\u1ed1i \u0111\u1ed9ng c\u01a1 v\u00e0 s\u1ef1 x\u00e1o tr\u1ed9n m\u00e0 c\u00e1c thi\u1ebft b\u1ecb kh\u00e1c g\u1eb7p ph\u1ea3i. H\u1ecfi xem tr\u00ecnh t\u1ef1 b\u1eaft \u0111\u1ea7u ho\u1eb7c ph\u01b0\u01a1ng ph\u00e1p b\u1eaft \u0111\u1ea7u kh\u00e1c c\u00f3 thay \u0111\u1ed5i k\u1ebft qu\u1ea3 hay kh\u00f4ng tr\u01b0\u1edbc khi coi c\u00f4ng su\u1ea5t m\u00e1y bi\u1ebfn \u00e1p b\u1ed5 sung l\u00e0 l\u1ef1a ch\u1ecdn duy nh\u1ea5t.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Gi\u1eef s\u1ef1 kh\u00e1c bi\u1ec7t r\u00f5 r\u00e0ng trong tr\u00ecnh: l\u1ecbch tr\u00ecnh nhu c\u1ea7u m\u00f4 t\u1ea3 \u0111i\u1ec1u ki\u1ec7n ch\u1ea1y, trong khi nghi\u00ean c\u1ee9u b\u1eaft \u0111\u1ea7u ki\u1ec3m tra m\u1ed9t s\u1ef1 ki\u1ec7n x\u00e1c \u0111\u1ecbnh. m\u1ed9t b\u1ed9 \u0111\u1ec7m c\u00f4ng su\u1ea5t chung kh\u00f4ng th\u1ec3 hi\u1ec7n hi\u1ec7u su\u1ea5t b\u1eaft \u0111\u1ea7u ch\u1ea5p nh\u1eadn \u0111\u01b0\u1ee3c.<\/p>\n\n\n\n<h2 id=\"evaluate-harmonic-loads-before-finalizing-capacity\" class=\"wp-block-heading\">\u0110\u00e1nh gi\u00e1 t\u1ea3i h\u00e0i h\u00f2a tr\u01b0\u1edbc khi ho\u00e0n thi\u1ec7n c\u00f4ng su\u1ea5t<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Trong tr\u01b0\u1eddng h\u1ee3p b\u1ed9 truy\u1ec1n \u0111\u1ed9ng, thi\u1ebft b\u1ecb s\u1ea1c ho\u1eb7c t\u1ea3i \u0111i\u1ec7n t\u1eed kh\u00e1c \u0111\u00e1ng k\u1ec3, h\u00e3y y\u00eau c\u1ea7u d\u1eef li\u1ec7u d\u1ea1ng s\u00f3ng d\u00f2ng \u0111i\u1ec7n ho\u1eb7c s\u00f3ng h\u00e0i thay v\u00ec ch\u1ec9 ph\u00ea duy\u1ec7t c\u00f4ng su\u1ea5t t\u1eeb kW.&nbsp;<a href=\"https:\/\/standards.ieee.org\/ieee\/C57.110\/5948\/\" target=\"_blank\" rel=\"noopener\">IEEE C57.110<\/a>&nbsp;cung c\u1ea5p c\u00e1c ph\u01b0\u01a1ng ph\u00e1p \u0111\u00e1nh gi\u00e1 kh\u1ea3 n\u0103ng c\u1ee7a m\u00e1y bi\u1ebfn \u00e1p khi cung c\u1ea5p d\u00f2ng t\u1ea3i kh\u00f4ng h\u00ecnh sin.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u0110\u1ed1i v\u1edbi k\u00edch th\u01b0\u1edbc m\u00e1y bi\u1ebfn \u00e1p ph\u00e2n ph\u1ed1i, y\u00eau c\u1ea7u nh\u00e0 cung c\u1ea5p xem x\u00e9t h\u1ed7n h\u1ee3p t\u1ea3i \u0111\u01b0\u1ee3c \u0111\u1ec1 xu\u1ea5t v\u00e0 gi\u1ea3i th\u00edch b\u1ea5t k\u1ef3 \u0111i\u1ec1u kho\u1ea3n thi\u1ebft k\u1ebf c\u1ea7n thi\u1ebft ho\u1eb7c h\u1ea1n ch\u1ebf t\u1ea3i. bao g\u1ed3m c\u00e1c m\u1ee9c ho\u1ea1t \u0111\u1ed9ng m\u00e0 d\u1eef li\u1ec7u h\u00e0i h\u00f2a \u0111\u01b0\u1ee3c \u0111o ho\u1eb7c ch\u1ec9 \u0111\u1ecbnh.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Kh\u00f4ng gi\u1ea3 \u0111\u1ecbnh r\u1eb1ng m\u1ed9t ph\u1ee5 c\u1ea5p ph\u1ea7n tr\u0103m chung gi\u1ea3i quy\u1ebft v\u1ea5n \u0111\u1ec1 n\u00e0y. b\u1eb1ng nhau, kh\u00f4ng quy \u0111\u1ecbnh c\u00f9ng m\u1ed9t c\u1ea5u tr\u00fac m\u00e1y bi\u1ebfn \u00e1p \u0111\u1eb7c bi\u1ec7t cho m\u1ed7i c\u00e0i \u0111\u1eb7t c\u00f3 ch\u1ee9a m\u1ed9t \u1ed5 \u0111\u0129a. vi\u1ec7c \u0111\u00e1nh gi\u00e1 n\u00ean k\u1ebft n\u1ed1i c\u00e1c \u0111\u1eb7c t\u00ednh t\u1ea3i th\u1ef1c t\u1ebf v\u1edbi m\u00e1y bi\u1ebfn \u00e1p \u0111\u01b0\u1ee3c \u0111\u1ec1 xu\u1ea5t.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Ghi l\u1ea1i k\u1ebft qu\u1ea3 nh\u01b0 m\u1ed9t kh\u1ea3 n\u0103ng x\u00e1c \u0111\u1ecbnh ho\u1eb7c gi\u1edbi h\u1ea1n trong l\u1ecbch tr\u00ecnh k\u1ef9 thu\u1eadt, kh\u00f4ng ch\u1ec9 \u0111\u01a1n gi\u1ea3n l\u00e0 \u201cph\u00f9 h\u1ee3p v\u1edbi s\u00f3ng h\u00e0i.\u201d<\/p>\n\n\n\n<h2 id=\"account-for-temperature-cooling-and-load-duration\" class=\"wp-block-heading\">T\u00e0i kho\u1ea3n Nhi\u1ec7t \u0111\u1ed9, L\u00e0m m\u00e1t v\u00e0 Th\u1eddi l\u01b0\u1ee3ng t\u1ea3i<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">K\u00edch th\u01b0\u1edbc m\u00e1y bi\u1ebfn \u00e1p ph\u00e2n ph\u1ed1i ph\u1ea3i ph\u1ea3n \u00e1nh m\u00f4i tr\u01b0\u1eddng m\u00e0 thi\u1ebft b\u1ecb s\u1ebd ho\u1ea1t \u0111\u1ed9ng.&nbsp;<a href=\"https:\/\/webstore.iec.ch\/en\/publication\/34351\" target=\"_blank\" rel=\"noopener\">IEC 60076-7<\/a>&nbsp;gi\u1ea3i quy\u1ebft t\u1ea3i m\u00e1y bi\u1ebfn \u00e1p ng\u00e2m d\u1ea7u kho\u00e1ng li\u00ean quan \u0111\u1ebfn nhi\u1ec7t \u0111\u1ed9 m\u00f4i tr\u01b0\u1eddng, nhi\u1ec7t \u0111\u1ed9 v\u1eadn h\u00e0nh v\u00e0 l\u00e3o h\u00f3a nhi\u1ec7t.&nbsp;<a href=\"https:\/\/webstore.iec.ch\/en\/publication\/592\" target=\"_blank\" rel=\"noopener\">IEC 60076-12<\/a>&nbsp;cung c\u1ea5p khung t\u1ea3i t\u01b0\u01a1ng \u1ee9ng cho m\u00e1y bi\u1ebfn \u00e1p lo\u1ea1i kh\u00f4 trong ph\u1ea1m vi c\u1ee7a n\u00f3.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">G\u1eedi \u0111\u1ed9 cao trang web, th\u00f4ng tin m\u00f4i tr\u01b0\u1eddng xung quanh-nhi\u1ec7t \u0111\u1ed9, chi ti\u1ebft bao v\u00e2y v\u00e0 s\u1eafp x\u1ebfp th\u00f4ng gi\u00f3 \u0111\u1ec1 xu\u1ea5t. y\u00eau c\u1ea7u nh\u00e0 cung c\u1ea5p x\u00e1c nh\u1eadn r\u1eb1ng x\u1ebfp h\u1ea1ng \u0111\u01b0\u1ee3c cung c\u1ea5p \u00e1p d\u1ee5ng trong nh\u1eefng \u0111i\u1ec1u ki\u1ec7n \u0111\u00f3.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Bao g\u1ed3m th\u1eddi l\u01b0\u1ee3ng v\u00e0 s\u1ef1 l\u1eb7p l\u1ea1i c\u1ee7a c\u00e1c giai \u0111o\u1ea1n t\u1ea3i cao. m\u1ed9t \u0111\u1ec9nh ng\u1eafn v\u00e0 m\u1ed9t ca s\u1ea3n xu\u1ea5t m\u1edf r\u1ed9ng kh\u00f4ng n\u00ean \u0111\u01b0\u1ee3c tr\u00ecnh b\u00e0y nh\u01b0 nhi\u1ec7m v\u1ee5 nhi\u1ec7t gi\u1ed1ng h\u1ec7t nhau. b\u1ea5t k\u1ef3 t\u1ea3i \u0111\u1ec1 xu\u1ea5t tr\u00ean b\u1ea3ng t\u00ean c\u1ea7n m\u1ed9t \u0111\u00e1nh gi\u00e1 thi\u1ebft b\u1ecb c\u1ee5 th\u1ec3, kh\u00f4ng cho ph\u00e9p suy ra t\u1eeb b\u00e0i vi\u1ebft n\u00e0y.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Khi m\u1ed9t \u0111\u1ec1 xu\u1ea5t bao g\u1ed3m x\u1ebfp h\u1ea1ng l\u00e0m m\u00e1t t\u1ef1 nhi\u00ean v\u00e0 c\u01b0\u1ee1ng b\u1ee9c, h\u00e3y x\u00e1c \u0111\u1ecbnh x\u1ebfp h\u1ea1ng n\u00e0o h\u1ed7 tr\u1ee3 ho\u1ea1t \u0111\u1ed9ng b\u00ecnh th\u01b0\u1eddng v\u00e0 \u0111i\u1ec1u g\u00ec x\u1ea3y ra khi kh\u00f4ng c\u00f3 h\u1ec7 th\u1ed1ng l\u00e0m m\u00e1t ph\u1ee5 tr\u1ee3.<\/p>\n\n\n\n<h2 id=\"review-impedance-and-the-downstream-equipment\" class=\"wp-block-heading\">Xem l\u1ea1i Tr\u1edf kh\u00e1ng v\u00e0 Thi\u1ebft b\u1ecb h\u1ea1 ngu\u1ed3n<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">M\u1ed9t con s\u1ed1 kVA l\u1edbn h\u01a1n kh\u00f4ng gi\u1ea3i quy\u1ebft \u0111i\u1ec1u ch\u1ec9nh \u0111i\u1ec7n \u00e1p ho\u1eb7c hi\u1ec7u su\u1ea5t l\u1ed7i. C\u00e1c&nbsp;<a href=\"https:\/\/webstore.iec.ch\/en\/publication\/606\" target=\"_blank\" rel=\"noopener\">H\u01b0\u1edbng d\u1eabn \u1ee9ng d\u1ee5ng IEC 60076-8<\/a>&nbsp;\u0111\u1ecba ch\u1ec9 k\u1ebft n\u1ed1i m\u00e1y bi\u1ebfn \u00e1p, d\u00f2ng \u0111i\u1ec7n s\u1ef1 c\u1ed1 h\u1ec7 th\u1ed1ng, ho\u1ea1t \u0111\u1ed9ng song song v\u00e0 thay \u0111\u1ed5i \u0111i\u1ec7n \u00e1p khi t\u1ea3i.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">X\u1eed l\u00fd k\u00edch th\u01b0\u1edbc bi\u1ebfn \u00e1p ph\u00e2n ph\u1ed1i nh\u01b0 l\u00e0 m\u1ed9t ph\u1ea7n c\u1ee7a \u0111\u00e1nh gi\u00e1 h\u1ec7 th\u1ed1ng. c\u00f3 \u0111\u01b0\u1ee3c tr\u1edf kh\u00e1ng \u0111\u1ec1 xu\u1ea5t, nh\u00f3m vector, s\u1eafp x\u1ebfp khai th\u00e1c v\u00e0 chi ti\u1ebft k\u1ebft n\u1ed1i. c\u00f3 k\u1ef9 s\u01b0 s\u1eed d\u1ee5ng ch\u00fang trong c\u00e1c nghi\u00ean c\u1ee9u t\u1ea3i-d\u00f2ng ch\u1ea3y, ng\u1eafn m\u1ea1ch v\u00e0 b\u1ea3o v.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Sau \u0111\u00f3 x\u00e1c minh giao di\u1ec7n v\u1edbi h\u1ea1 l\u01b0u&nbsp;<a href=\"https:\/\/lanshanelectric.com\/vi\/danh-muc-san-pham\/switchgear-dien-ap-thap\/\">switchgear \u0111i\u1ec7n \u00e1p th\u1ea5p<\/a>, c\u00e1p v\u00e0 k\u1ebft n\u1ed1i xe bu\u00fdt. 738 A \u0111\u01b0\u1ee3c t\u00ednh to\u00e1n trong v\u00ed d\u1ee5 nh\u00e0 m\u00e1y m\u00f4 t\u1ea3 t\u1ea3i gi\u1ea3 \u0111\u1ecbnh; n\u00f3 kh\u00f4ng \u0111\u1ed9c l\u1eadp ch\u1ecdn b\u1ed9 ng\u1eaft m\u1ea1ch ho\u1eb7c thi\u1ebft l\u1eadp ampacity c\u00e1p.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u0110\u1ed1i v\u1edbi c\u00e1c d\u1ef1 \u00e1n m\u1edf r\u1ed9ng, n\u00eau r\u00f5 m\u00e1y bi\u1ebfn \u00e1p s\u1ebd ho\u1ea1t \u0111\u1ed9ng ri\u00eang bi\u1ec7t hay song song. kh\u00f4ng gi\u1ea3 s\u1eed hai \u0111\u01a1n v\u1ecb t\u01b0\u01a1ng th\u00edch v\u00ec t\u1ef7 l\u1ec7 \u0111i\u1ec7n \u00e1p danh \u0111\u1ecbnh v\u00e0 x\u1ebfp h\u1ea1ng kVA c\u1ee7a ch\u00fang ph\u00f9 h\u1ee3p.<\/p>\n\n\n\n<h2 id=\"choosing-between-dry-type-and-oil-immersed-designs\" class=\"wp-block-heading\">L\u1ef1a ch\u1ecdn gi\u1eefa thi\u1ebft k\u1ebf ki\u1ec3u kh\u00f4 v\u00e0 ng\u00e2m d\u1ea7u<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Vi\u1ec7c t\u00ednh to\u00e1n t\u1ea3i thi\u1ebft l\u1eadp nhi\u1ec7m v\u1ee5 \u0111\u01b0\u1ee3c cung c\u1ea5p; s\u1ef1 l\u1ef1a ch\u1ecdn x\u00e2y d\u1ef1ng c\u0169ng \u0111\u00f2i h\u1ecfi ph\u1ea3i xem x\u00e9t c\u00e0i \u0111\u1eb7t.\u0110\u1ed1i v\u1edbi thi\u1ebft b\u1ecb lo\u1ea1i kh\u00f4 trong ph\u1ea1m vi c\u1ee7a n\u00f3,&nbsp;<a href=\"https:\/\/webstore.iec.ch\/en\/publication\/29711\" target=\"_blank\" rel=\"noopener\">IEC 60076-11<\/a>&nbsp;l\u00e0 m\u1ed9t ti\u00eau chu\u1ea9n s\u1ea3n ph\u1ea9m c\u00f3 li\u00ean quan. \u0111\u00e1nh gi\u00e1 t\u1ea3i n\u00ean s\u1eed d\u1ee5ng h\u01b0\u1edbng d\u1eabn th\u00edch h\u1ee3p cho vi\u1ec7c x\u00e2y d\u1ef1ng \u0111\u01b0\u1ee3c l\u1ef1a ch\u1ecdn.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Ph\u1ea1m vi bi\u1ebfn \u00e1p c\u1ee7a Lanshan bao g\u1ed3m a&nbsp;<a href=\"https:\/\/lanshanelectric.com\/vi\/san-pham\/may-bien-ap-loai-kho-10kv\/\">M\u00e1y bi\u1ebfn \u00e1p lo\u1ea1i kh\u00f4 10kV<\/a>&nbsp;v\u00e0 m\u1ed9t&nbsp;<a href=\"https:\/\/lanshanelectric.com\/vi\/san-pham\/may-bien-ap-ngam-dau\/\">m\u00e1y bi\u1ebfn \u00e1p ng\u00e2m d\u1ea7u<\/a>. Nh\u1eefng \u0111i\u1ec1u n\u00e0y cung c\u1ea5p \u0111i\u1ec3m kh\u1edfi \u0111\u1ea7u cho cu\u1ed9c th\u1ea3o lu\u1eadn v\u1ec1 c\u1ea5u h\u00ecnh, thay v\u00ec thay th\u1ebf cho b\u1ea3ng d\u1eef li\u1ec7u d\u1ef1 \u00e1n \u0111\u00e3 \u0111\u01b0\u1ee3c ph\u00ea duy\u1ec7t.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Gi\u1eef c\u00f9ng m\u1ed9t gi\u1ea3 \u0111\u1ecbnh k\u00edch th\u01b0\u1edbc m\u00e1y bi\u1ebfn \u00e1p ph\u00e2n ph\u1ed1i khi so s\u00e1nh c\u00e1c thi\u1ebft k\u1ebf. y\u00eau c\u1ea7u x\u00e1c nh\u1eadn s\u1eafp x\u1ebfp l\u00e0m m\u00e1t, \u0111i\u1ec1u ki\u1ec7n trang web \u00e1p d\u1ee5ng, gi\u1ea3i ph\u00f3ng m\u1eb7t b\u1eb1ng v\u1eadt l\u00fd v\u00e0 c\u00e1c \u0111i\u1ec1u kho\u1ea3n c\u00e0i \u0111\u1eb7t c\u1ea7n thi\u1ebft. n\u1ebfu kh\u00f4ng, hai \u0111\u1ec1 xu\u1ea5t v\u1edbi c\u00f9ng m\u1ed9t c\u00f4ng su\u1ea5t ti\u00eau \u0111\u1ec1 c\u00f3 th\u1ec3 d\u1ef1a tr\u00ean nhi\u1ec7m v\u1ee5 kh\u00e1c nhau.<\/p>\n\n\n\n<h2 id=\"what-to-send-with-a-transformer-enquiry\" class=\"wp-block-heading\">G\u1eedi g\u00ec v\u1edbi y\u00eau c\u1ea7u v\u1ec1 m\u00e1y bi\u1ebfn \u00e1p<\/h2>\n\n\n\n<figure class=\"wp-block-image aligncenter size-full\"><img decoding=\"async\" width=\"800\" height=\"533\" src=\"https:\/\/lanshanelectric.com\/wp-content\/uploads\/2026\/08\/Transformer.jpg\" alt=\"D\u1ea7u Immeded Transformer\" class=\"wp-image-827\" srcset=\"https:\/\/lanshanelectric.com\/wp-content\/uploads\/2026\/08\/Transformer.jpg 800w, https:\/\/lanshanelectric.com\/wp-content\/uploads\/2026\/08\/Transformer-300x200.jpg 300w, https:\/\/lanshanelectric.com\/wp-content\/uploads\/2026\/08\/Transformer-768x512.jpg 768w, https:\/\/lanshanelectric.com\/wp-content\/uploads\/2026\/08\/Transformer-600x400.jpg 600w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">M\u1ed9t y\u00eau c\u1ea7u v\u1ec1 k\u00edch th\u01b0\u1edbc m\u00e1y bi\u1ebfn \u00e1p ph\u00e2n ph\u1ed1i h\u1eefu \u00edch bao g\u1ed3m t\u00ednh to\u00e1n v\u00e0 c\u00e1c \u0111\u1ea7u v\u00e0o h\u1ed7 tr\u1ee3 c\u1ee7a n\u00f3, kh\u00f4ng ch\u1ec9 kVA \u0111\u01b0\u1ee3c y\u00eau c\u1ea7u. S\u1eed d\u1ee5ng nh\u1eefng n\u1ed9i dung sau l\u00e0m danh s\u00e1ch ki\u1ec3m tra mua s\u1eafm thay v\u00ec l\u1ecbch tr\u00ecnh tu\u00e2n th\u1ee7 chung.<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th class=\"has-text-align-left\" data-align=\"left\">\u0110\u1ea7u v\u00e0o d\u1ef1 \u00e1n<\/th><th class=\"has-text-align-left\" data-align=\"left\">Th\u00f4ng tin \u0111\u1ec3 cung c\u1ea5p<\/th><th class=\"has-text-align-left\" data-align=\"left\">X\u00e1c nh\u1eadn y\u00eau c\u1ea7u<\/th><\/tr><\/thead><tbody><tr><td class=\"has-text-align-left\" data-align=\"left\">Cung c\u1ea5p \u0111i\u1ec7n<\/td><td class=\"has-text-align-left\" data-align=\"left\">\u0110i\u1ec7n \u00e1p s\u01a1 c\u1ea5p v\u00e0 th\u1ee9 c\u1ea5p, t\u1ea7n s\u1ed1, pha<\/td><td class=\"has-text-align-left\" data-align=\"left\">T\u1ef7 l\u1ec7 \u0111i\u1ec7n \u00e1p \u0111\u1ec1 xu\u1ea5t v\u00e0 b\u1ed1 tr\u00ed khai th\u00e1c<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">Nhu c\u1ea7u ho\u1ea1t \u0111\u1ed9ng<\/td><td class=\"has-text-align-left\" data-align=\"left\">L\u1ecbch tr\u00ecnh t\u1ea3i, nhu c\u1ea7u \u0111\u1ed3ng th\u1eddi, h\u1ec7 s\u1ed1 c\u00f4ng su\u1ea5t<\/td><td class=\"has-text-align-left\" data-align=\"left\">C\u01a1 s\u1edf n\u0103ng l\u1ef1c v\u00e0 c\u00e1c gi\u1ea3 \u0111\u1ecbnh \u0111\u00e3 n\u00eau<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">T\u1ea3i tr\u1ecdng \u0111\u1eb7c bi\u1ec7t<\/td><td class=\"has-text-align-left\" data-align=\"left\">Th\u00f4ng tin kh\u1edfi \u0111\u1ed9ng \u0111\u1ed9ng c\u01a1 v\u00e0 h\u00e0i h\u00f2a<\/td><td class=\"has-text-align-left\" data-align=\"left\">C\u00e1c nghi\u00ean c\u1ee9u b\u1eaft bu\u1ed9c ho\u1eb7c c\u00e1c \u0111i\u1ec1u kho\u1ea3n thi\u1ebft k\u1ebf<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">\u0110i\u1ec1u ki\u1ec7n trang web<\/td><td class=\"has-text-align-left\" data-align=\"left\">Nhi\u1ec7t \u0111\u1ed9, \u0111\u1ed9 cao, bao v\u00e2y v\u00e0 th\u00f4ng gi\u00f3<\/td><td class=\"has-text-align-left\" data-align=\"left\">\u0110\u00e1nh gi\u00e1 v\u00e0 gi\u1edbi h\u1ea1n l\u00e0m m\u00e1t \u00e1p d\u1ee5ng<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">Giao di\u1ec7n h\u1ec7 th\u1ed1ng<\/td><td class=\"has-text-align-left\" data-align=\"left\">S\u01a1 \u0111\u1ed3 \u0111\u01a1n d\u00f2ng, y\u00eau c\u1ea7u b\u1ea3o v\u1ec7 v\u00e0 n\u1ed1i \u0111\u1ea5t<\/td><td class=\"has-text-align-left\" data-align=\"left\">Tr\u1edf kh\u00e1ng, nh\u00f3m vect\u01a1 v\u00e0 chi ti\u1ebft k\u1ebft n\u1ed1i<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">M\u1edf r\u1ed9ng<\/td><td class=\"has-text-align-left\" data-align=\"left\">B\u1ed5 sung v\u00e0 th\u1eddi gian \u0111\u01b0\u1ee3c x\u00e1c \u0111\u1ecbnh<\/td><td class=\"has-text-align-left\" data-align=\"left\">K\u1ecbch b\u1ea3n ho\u1ea1t \u0111\u1ed9ng hi\u1ec7n t\u1ea1i v\u00e0 t\u01b0\u01a1ng lai<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Gi\u1eef m\u1ed9t ng\u00e0y s\u1eeda \u0111\u1ed5i tr\u00ean l\u1ecbch tr\u00ecnh k\u00edch th\u01b0\u1edbc bi\u1ebfn \u00e1p ph\u00e2n ph\u1ed1i.Khi m\u1ed9t t\u1ea3i thay \u0111\u1ed5i, c\u1eadp nh\u1eadt \u0111\u00f3ng g\u00f3p nhu c\u1ea7u c\u1ee7a n\u00f3 v\u00e0 g\u1eafn c\u1edd c\u00e1c gi\u1ea3 \u0111\u1ecbnh b\u1ecb \u1ea3nh h\u01b0\u1edfng tr\u01b0\u1edbc khi y\u00eau c\u1ea7u c\u00e1c nh\u00e0 cung c\u1ea5p s\u1eeda \u0111\u1ed5i \u0111\u1ec1 xu\u1ea5t c\u1ee7a h\u1ecd.\u0110i\u1ec1u n\u00e0y tr\u00e1nh so s\u00e1nh m\u1ed9t \u0111\u1ec1 ngh\u1ecb d\u1ef1a tr\u00ean b\u1ed1 tr\u00ed quy tr\u00ecnh ban \u0111\u1ea7u v\u1edbi m\u1ed9t \u0111\u1ec1 ngh\u1ecb kh\u00e1c d\u1ef1a tr\u00ean m\u1ed9t m\u1edf r\u1ed9ng sau n\u00e0y.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Y\u00eau c\u1ea7u m\u1ed9t b\u1ea3ng d\u1eef li\u1ec7u \u0111\u00e3 \u0111\u01b0\u1ee3c ph\u00ea duy\u1ec7t, b\u1ea3n v\u1ebd chi\u1ec1u v\u00e0 l\u1ecbch tr\u00ecnh t\u00e0i li\u1ec7u ki\u1ec3m tra \u0111\u00e3 \u0111\u01b0\u1ee3c th\u1ed1ng nh\u1ea5t tr\u01b0\u1edbc khi ch\u1ea5p nh\u1eadn cu\u1ed1i c\u00f9ng. ch\u1ec9 \u0111\u1ecbnh nh\u1eefng c\u00e2u h\u1ecfi k\u1ef9 thu\u1eadt n\u00e0o v\u1eabn c\u00f2n m\u1edf v\u00e0 ai s\u1ebd ph\u00ea duy\u1ec7t t\u1eebng c\u00e2u tr\u1ea3 l\u1eddi.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">c\u1ee7a Lanshan&nbsp;<a href=\"https:\/\/lanshanelectric.com\/vi\/danh-muc-san-pham\/may-bien-ap-dien\/\">ph\u1ea1m vi bi\u1ebfn \u00e1p \u0111i\u1ec7n<\/a>&nbsp;c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c xem x\u00e9t ch\u1ed1ng l\u1ea1i c\u00e1c y\u00eau c\u1ea7u n\u00e0y. gi\u1eef b\u1ea3o \u0111\u1ea3m m\u00f4 h\u00ecnh c\u1ee5 th\u1ec3 t\u00e1ch bi\u1ec7t v\u1edbi m\u00f4 t\u1ea3 lo\u1ea1t r\u1ed9ng.<\/p>\n\n\n\n<h2 id=\"conclusion\" class=\"wp-block-heading\">K\u1ebft lu\u1eadn<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">K\u00edch th\u01b0\u1edbc m\u00e1y bi\u1ebfn \u00e1p ph\u00e2n ph\u1ed1i t\u1ed1t k\u1ebft n\u1ed1i m\u1ed9t k\u1ecbch b\u1ea3n ho\u1ea1t \u0111\u1ed9ng \u0111\u00e1ng tin c\u1eady v\u1edbi c\u1ea5u h\u00ecnh thi\u1ebft b\u1ecb \u0111\u00e3 \u0111\u01b0\u1ee3c x\u00e1c minh. t\u00ednh to\u00e1n nhu c\u1ea7u \u0111\u1ed3ng th\u1eddi, s\u1eed d\u1ee5ng h\u1ec7 s\u1ed1 c\u00f4ng su\u1ea5t t\u01b0\u01a1ng \u1ee9ng v\u00e0 ph\u00e2n bi\u1ec7t t\u0103ng tr\u01b0\u1edfng theo k\u1ebf ho\u1ea1ch v\u1edbi s\u1ef1 kh\u00f4ng ch\u1eafc ch\u1eafn. sau \u0111\u00f3 gi\u1ea3i quy\u1ebft c\u00e1c y\u00eau c\u1ea7u b\u1eaft \u0111\u1ea7u, h\u00e0i h\u00f2a, nhi\u1ec7t v\u00e0 giao di\u1ec7n h\u1ec7 th\u1ed1ng tr\u01b0\u1edbc khi ph\u00ea duy\u1ec7t.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u0110\u1ec3 th\u1ea3o lu\u1eadn v\u1ec1 m\u1ed9t c\u1ea5u h\u00ecnh ph\u00f9 h\u1ee3p,&nbsp;<a href=\"https:\/\/lanshanelectric.com\/vi\/lien-he-voi-chung-toi\/\">li\u00ean h\u1ec7 Lanshan Electric<\/a>&nbsp;v\u1edbi l\u1ecbch tr\u00ecnh t\u1ea3i c\u1ee7a b\u1ea1n, s\u01a1 \u0111\u1ed3 \u0111\u01a1n d\u00f2ng, y\u00eau c\u1ea7u \u0111i\u1ec7n \u00e1p v\u00e0 \u0111i\u1ec1u ki\u1ec7n c\u00e0i \u0111\u1eb7t. bao g\u1ed3m k\u1ebf ho\u1ea1ch m\u1edf r\u1ed9ng \u0111\u1ec3 vi\u1ec7c xem x\u00e9t c\u00f3 th\u1ec3 gi\u1ea3i quy\u1ebft c\u1ea3 c\u00e0i \u0111\u1eb7t ban \u0111\u1ea7u v\u00e0 giai \u0111o\u1ea1n ti\u1ebfp theo c\u1ee7a n\u00f3.<\/p>\n\n\n\n<h2 id=\"faq\" class=\"wp-block-heading\">C\u00e2u h\u1ecfi th\u01b0\u1eddng g\u1eb7p<\/h2>\n\n\n\n<h3 id=\"what-is-the-basic-distribution-transformer-sizing-formula\" class=\"wp-block-heading\">C\u00f4ng th\u1ee9c \u0111\u1ecbnh c\u1ee1 m\u00e1y bi\u1ebfn \u00e1p ph\u00e2n ph\u1ed1i c\u01a1 b\u1ea3n l\u00e0 g\u00ec?<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Chia nhu c\u1ea7u \u0111i\u1ec7n \u0111\u1ed3ng th\u1eddi t\u00ednh b\u1eb1ng kW cho h\u1ec7 s\u1ed1 c\u00f4ng su\u1ea5t t\u1ed5ng h\u1ee3p t\u01b0\u01a1ng \u1ee9ng \u0111\u1ec3 thu \u0111\u01b0\u1ee3c kVA. V\u00ed d\u1ee5: 400 kW \u1edf h\u1ec7 s\u1ed1 c\u00f4ng su\u1ea5t 0,90 b\u1eb1ng kho\u1ea3ng 444,4 kVA, tr\u01b0\u1edbc khi ki\u1ec3m tra \u1ee9ng d\u1ee5ng c\u00f2n l\u1ea1i.<\/p>\n\n\n\n<h3 id=\"can-i-size-a-transformer-from-monthly-electricity-consumption\" class=\"wp-block-heading\">T\u00f4i c\u00f3 th\u1ec3 k\u00edch th\u01b0\u1edbc m\u1ed9t m\u00e1y bi\u1ebfn \u00e1p t\u1eeb ti\u00eau th\u1ee5 \u0111i\u1ec7n h\u00e0ng th\u00e1ng?<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Kh\u00f4ng ph\u1ea3i t\u1eeb kWh h\u00e0ng th\u00e1ng m\u1ed9t m\u00ecnh. n\u0103ng l\u01b0\u1ee3ng trong m\u1ed9t kho\u1ea3ng th\u1eddi gian kh\u00f4ng x\u00e1c \u0111\u1ecbnh nhu c\u1ea7u cao \u0111i\u1ec3m trong \u0111\u00f3. y\u00eau c\u1ea7u d\u1eef li\u1ec7u nhu c\u1ea7u kho\u1ea3ng th\u1eddi gian v\u00e0 h\u1ed3 s\u01a1 ho\u1ea1t \u0111\u1ed9ng h\u01a1n l\u00e0 x\u1eed l\u00fd ti\u00eau th\u1ee5 trung b\u00ecnh nh\u01b0 t\u1ea3i t\u1ed1i \u0111a. h\u01b0\u1edbng d\u1eabn hi\u1ec7u qu\u1ea3 bi\u1ebfn \u00e1p c\u0169ng ph\u00e2n bi\u1ec7t t\u1ea3i trung b\u00ecnh v\u00e0 cao \u0111i\u1ec3m.<\/p>\n\n\n\n<h3 id=\"should-distribution-transformer-sizing-always-include-25-spare-capacity\" class=\"wp-block-heading\">C\u00f3 n\u00ean ph\u00e2n ph\u1ed1i k\u00edch th\u01b0\u1edbc bi\u1ebfn \u00e1p lu\u00f4n lu\u00f4n bao g\u1ed3m 25% c\u00f4ng su\u1ea5t d\u1ef1 ph\u00f2ng?<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">S\u1eed d\u1ee5ng m\u1ed9t kho\u1ea3n tr\u1ee3 c\u1ea5p d\u1ef1 \u00e1n \u0111\u01b0\u1ee3c ghi l\u1ea1i thay v\u00ec gi\u1ea3 \u0111\u1ecbnh m\u1ed9t ph\u1ea7n tr\u0103m ph\u00f9 h\u1ee3p v\u1edbi m\u1ecdi c\u01a1 s\u1edf. b\u1ed5 sung \u0111\u01b0\u1ee3c ph\u00ea duy\u1ec7t ri\u00eang bi\u1ec7t t\u1eeb t\u0103ng tr\u01b0\u1edfng kh\u00f4ng ch\u1eafc ch\u1eafn v\u00e0 kho\u1ea3ng kh\u00f4ng ho\u1ea1t \u0111\u1ed9ng \u01b0a th\u00edch. kh\u00f4ng t\u00ednh c\u00f9ng m\u1ed9t m\u1edf r\u1ed9ng hai l\u1ea7n ho\u1eb7c s\u1eed d\u1ee5ng c\u00f4ng su\u1ea5t d\u1ef1 ph\u00f2ng \u0111\u1ec3 thay th\u1ebf cho c\u00e1c nghi\u00ean c\u1ee9u \u1ee9ng d\u1ee5ng.<\/p>\n\n\n\n<h3 id=\"is-a-630-k-va-transformer-enough-for-a-500-k-w-load\" class=\"wp-block-heading\">M\u00e1y bi\u1ebfn \u00e1p 630 kVA c\u00f3 \u0111\u1ee7 t\u1ea3i 500 kW kh\u00f4ng?<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">T\u1ea1i 0,90 h\u1ec7 s\u1ed1 c\u00f4ng su\u1ea5t, 500 kW b\u1eb1ng kho\u1ea3ng 555,6 kVA; t\u1ea1i 0,80, n\u00f3 b\u1eb1ng 625 kVA. kh\u00f4ng t\u00ednh to\u00e1n m\u1ed9t m\u00ecnh thi\u1ebft l\u1eadp s\u1ef1 ph\u00f9 h\u1ee3p. \u0111i\u1ec1u ki\u1ec7n l\u00e0m m\u00e1t th\u1ef1c t\u1ebf, th\u1eddi gian t\u1ea3i, nhi\u1ec7m v\u1ee5 b\u1eaft \u0111\u1ea7u v\u00e0 c\u00e1c y\u00eau c\u1ea7u kh\u00e1c c\u1ee7a d\u1ef1 \u00e1n v\u1eabn c\u1ea7n xem x\u00e9t.<\/p>\n\n\n\n<h3 id=\"does-choosing-a-dry-type-transformer-change-the-k-va-calculation\" class=\"wp-block-heading\">Vi\u1ec7c ch\u1ecdn m\u00e1y bi\u1ebfn \u00e1p lo\u1ea1i kh\u00f4 c\u00f3 l\u00e0m thay \u0111\u1ed5i t\u00ednh to\u00e1n kVA kh\u00f4ng?<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Vi\u1ec7c chuy\u1ec3n \u0111\u1ed5i t\u1ea3i c\u01a1 b\u1ea3n v\u1eabn gi\u1eef nguy\u00ean. nh\u1eefng thay \u0111\u1ed5i l\u00e0 \u0111\u00e1nh gi\u00e1 c\u1ee5 th\u1ec3 x\u00e2y d\u1ef1ng c\u1ee7a l\u00e0m m\u00e1t, \u0111i\u1ec1u ki\u1ec7n ho\u1ea1t \u0111\u1ed9ng v\u00e0 kh\u1ea3 n\u0103ng t\u1ea3i. so s\u00e1nh c\u00e1c thi\u1ebft k\u1ebf so v\u1edbi c\u00e1c gi\u1ea3 \u0111\u1ecbnh t\u1ea3i gi\u1ed1ng h\u1ec7t nhau v\u00e0 c\u00f3 \u0111\u01b0\u1ee3c x\u00e1c nh\u1eadn cho vi\u1ec7c c\u00e0i \u0111\u1eb7t \u0111\u1ec1 xu\u1ea5t.<\/p>","protected":false},"excerpt":{"rendered":"<p>K\u00edch th\u01b0\u1edbc bi\u1ebfn \u00e1p ph\u00e2n ph\u1ed1i v\u1edbi c\u00f4ng th\u1ee9c kVA, t\u00ednh to\u00e1n t\u1ea3i v\u00e0 ki\u1ec3m tra m\u1edf r\u1ed9ng. g\u1eedi cho Lanshan l\u1ecbch tr\u00ecnh t\u1ea3i c\u1ee7a b\u1ea1n \u0111\u1ec3 xem x\u00e9t c\u1ea5u h\u00ecnh.<\/p>","protected":false},"author":1,"featured_media":511,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[42,44,46,45,47,43],"class_list":["post-1411","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog","tag-distribution-transformer-sizing","tag-distribution-transformers","tag-dry-type-transformers","tag-electrical-load-calculation","tag-oil-immersed-transformers","tag-transformer-kva-calculation"],"_links":{"self":[{"href":"https:\/\/lanshanelectric.com\/vi\/wp-json\/wp\/v2\/posts\/1411","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/lanshanelectric.com\/vi\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/lanshanelectric.com\/vi\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/lanshanelectric.com\/vi\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/lanshanelectric.com\/vi\/wp-json\/wp\/v2\/comments?post=1411"}],"version-history":[{"count":1,"href":"https:\/\/lanshanelectric.com\/vi\/wp-json\/wp\/v2\/posts\/1411\/revisions"}],"predecessor-version":[{"id":1412,"href":"https:\/\/lanshanelectric.com\/vi\/wp-json\/wp\/v2\/posts\/1411\/revisions\/1412"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/lanshanelectric.com\/vi\/wp-json\/wp\/v2\/media\/511"}],"wp:attachment":[{"href":"https:\/\/lanshanelectric.com\/vi\/wp-json\/wp\/v2\/media?parent=1411"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/lanshanelectric.com\/vi\/wp-json\/wp\/v2\/categories?post=1411"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/lanshanelectric.com\/vi\/wp-json\/wp\/v2\/tags?post=1411"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}