{"id":2859,"date":"2026-08-26T05:52:00","date_gmt":"2026-08-26T05:52:00","guid":{"rendered":"https:\/\/lbajiele.com\/?p=2859"},"modified":"2026-08-25T12:09:56","modified_gmt":"2026-08-25T12:09:56","slug":"delta-y-transformer-connection-wiring-and-diagram-guide","status":"publish","type":"post","link":"https:\/\/lbajiele.com\/vi\/blog\/delta-y-transformer-connection-wiring-and-diagram-guide\/","title":{"rendered":"K\u1ebft n\u1ed1i m\u00e1y bi\u1ebfn \u00e1p Sao-Tam gi\u00e1c (Delta-Wye): Nh\u00f3m v\u00e9c-t\u01a1, N\u1ed1i \u0111\u1ea5t &amp; \u1ee8ng d\u1ee5ng"},"content":{"rendered":"<p><strong>K\u1ebft n\u1ed1i m\u00e1y bi\u1ebfn \u00e1p tam gi\u00e1c-sao s\u1eed d\u1ee5ng m\u1ed9t m\u1ea1ch tam gi\u00e1c k\u00edn \u1edf m\u1ed9t cu\u1ed9n d\u00e2y v\u00e0 m\u1ed9t cu\u1ed9n sao \u0111\u01b0\u1ee3c n\u1ed1i \u0111\u1ea5t ho\u1eb7c kh\u00f4ng n\u1ed1i \u0111\u1ea5t \u1edf cu\u1ed9n d\u00e2y c\u00f2n l\u1ea1i, t\u1ea1o ra \u0111\u1ed9 l\u1ec7ch pha 30 \u0111\u1ed9 v\u00e0 cung c\u1ea5p m\u1ed9t d\u00e2y trung t\u00ednh khi \u0111i\u1ec3m sao \u0111\u01b0\u1ee3c \u0111\u01b0a ra ngo\u00e0i.<\/strong> Ki\u1ec3u \u0111\u1ea5u n\u1ed1i n\u00e0y r\u1ea5t ph\u1ed5 bi\u1ebfn trong h\u1ec7 th\u1ed1ng ph\u00e2n ph\u1ed1i ba pha, nh\u01b0ng nh\u00f3m v\u1ea5u \u0111\u1ea5u (t\u1ed5 \u0111\u1ea5u d\u00e2y), th\u1ee9 t\u1ef1 pha, ph\u01b0\u01a1ng ph\u00e1p n\u1ed1i \u0111\u1ea5t, \u0111\u01b0\u1eddng d\u1eabn th\u1ee9 t\u1ef1 kh\u00f4ng v\u00e0 b\u00f9 b\u1ea3o v\u1ec7 ph\u1ea3i \u0111\u01b0\u1ee3c quy \u0111\u1ecbnh \u0111\u1ed3ng th\u1eddi. M\u1ed9t b\u1ea3n ph\u00e1c th\u1ea3o \u0111\u01a1n gi\u1ea3n l\u00e0 ch\u01b0a \u0111\u1ee7 \u0111\u1ec3 ch\u1ea1y song song ho\u1eb7c c\u00e0i \u0111\u1eb7t r\u01a1-le.<\/p>\n<div class=\"lbaji-key-takeaways\"><h2>Nh\u1eefng \u0111i\u1ec3m ch\u00ednh<\/h2><ul><li>\u0110i\u1ec7n \u00e1p d\u00e2y v\u00e0 \u0111i\u1ec7n \u00e1p pha l\u1ec7ch nhau $\\sqrt{3}$ \u1edf ph\u00eda \u0111\u1ea5u h\u00ecnh sao.<\/li><li>K\u00fd hi\u1ec7u m\u1eb7t \u0111\u1ed3ng h\u1ed3 x\u00e1c \u0111\u1ecbnh li\u1ec7u d\u00e2y qu\u1ea5n th\u1ee9 c\u1ea5p v\u01b0\u1ee3t tr\u01b0\u1edbc hay ch\u1eadm pha v\u00e0 l\u00e0 y\u1ebfu t\u1ed1 thi\u1ebft y\u1ebfu \u0111\u1ec3 ch\u1ea1y song song.<\/li><li>Hi\u1ec7n t\u01b0\u1ee3ng n\u1ed1i \u0111\u1ea5t v\u00e0 \u0111\u1eb7c t\u00ednh th\u1ee9 t\u1ef1 kh\u00f4ng \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn c\u00e1c s\u1ef1 c\u1ed1 v\u00e0 b\u1ea3o v\u1ec7.<\/li><\/ul><\/div>\n<h2>M\u1ed1i quan h\u1ec7 \u0111i\u1ec7n \u00e1p h\u00ecnh sao v\u00e0 tam gi\u00e1c<\/h2><figure class=\"wp-block-image size-large\"><img decoding=\"async\" alt=\"Delta and star transformer terminal connections\" loading=\"lazy\" src=\"https:\/\/lbajiele.com\/wp-content\/uploads\/2026\/08\/delta-star-terminal-connections.png\"\/><figcaption>C\u00e1c \u0111\u1ea7u n\u1ed1i m\u00e1y bi\u1ebfn \u00e1p ki\u1ec3u tam gi\u00e1c (delta) v\u00e0 h\u00ecnh sao (star).<\/figcaption><\/figure>\n<p>Trong m\u1ea1ch tam gi\u00e1c, m\u1ed7i pha d\u00e2y qu\u1ea5n \u0111\u01b0\u1ee3c \u0111\u1ea5u n\u1ed1i gi\u1eefa hai \u0111i\u1ec7n \u00e1p d\u00e2y, do \u0111\u00f3 \u0111i\u1ec7n \u00e1p d\u00e2y qu\u1ea5n b\u1eb1ng \u0111i\u1ec7n \u00e1p d\u00e2y. Trong m\u1ea1ch h\u00ecnh sao, m\u1ed7i pha d\u00e2y qu\u1ea5n \u0111\u01b0\u1ee3c \u0111\u1ea5u n\u1ed1i t\u1eeb d\u00e2y pha \u0111\u1ebfn trung t\u00ednh, do \u0111\u00f3 \u0111i\u1ec7n \u00e1p d\u00e2y b\u1eb1ng \u221a3 l\u1ea7n \u0111i\u1ec7n \u00e1p pha. Do \u0111\u00f3, t\u1ec9 s\u1ed1 v\u00f2ng d\u00e2y ph\u1ea3i \u0111\u01b0\u1ee3c so s\u00e1nh b\u1eb1ng c\u00e1ch s\u1eed d\u1ee5ng \u0111i\u1ec7n \u00e1p pha d\u00e2y qu\u1ea5n, ch\u1ee9 kh\u00f4ng ph\u1ea3i b\u1eb1ng c\u00e1ch chia hai \u0111i\u1ec7n \u00e1p d\u00e2y m\u00e0 kh\u00f4ng xem x\u00e9t c\u00e1ch \u0111\u1ea5u n\u1ed1i.<\/p>\n<p>\u0110\u1ed1i v\u1edbi m\u00e1y bi\u1ebfn \u00e1p t\u1eeb tam gi\u00e1c 480 V sang sao 208Y\/120 V, cu\u1ed9n d\u00e2y tam gi\u00e1c nh\u1eadn \u0111i\u1ec7n \u00e1p 480 V m\u1ed7i pha v\u00e0 m\u1ed7i cu\u1ed9n d\u00e2y h\u00ecnh sao cung c\u1ea5p \u0111i\u1ec7n \u00e1p pha-trung t\u00ednh 120 V. \u0110i\u1ec7n \u00e1p d\u00e2y-d\u00e2y th\u1ee9 c\u1ea5p x\u1ea5p x\u1ec9 120 \u00d7 \u221a3 = 208 V.<\/p>\n<h2>\u0110\u1ed9 l\u1ec7ch pha ba m\u01b0\u01a1i \u0111\u1ed9 v\u00e0 c\u00e1c nh\u00f3m v\u00e9c-t\u01a1<\/h2>\n<p>M\u1ed9t b\u1ed9 bi\u1ebfn \u00e1p \u0111\u1ea5u tam gi\u00e1c-sao t\u1ea1o ra \u0111\u1ed9 l\u1ec7ch 30 \u0111\u1ed9 gi\u1eefa \u0111i\u1ec7n \u00e1p d\u00e2y s\u01a1 c\u1ea5p v\u00e0 th\u1ee9 c\u1ea5p. Ph\u00eda \u0111i\u1ec7n \u00e1p th\u1ea5p v\u01b0\u1ee3t tr\u01b0\u1edbc hay tr\u1ec5 pha ph\u1ee5 thu\u1ed9c v\u00e0o c\u1ef1c t\u00ednh \u0111\u1ea7u cu\u1ed1i v\u00e0 c\u00e1ch \u0111\u1ea5u n\u1ed1i. K\u00fd hi\u1ec7u \u0111\u1ed3ng h\u1ed3 IEC bi\u1ec3u th\u1ecb m\u1ed1i quan h\u1ec7 n\u00e0y, ch\u1eb3ng h\u1ea1n nh\u01b0 Dyn1 ho\u1eb7c Dyn11, c\u00f9ng v\u1edbi c\u00e1c c\u00e1ch \u0111\u1ea5u d\u00e2y qu\u1ea5n v\u00e0 \u0111i\u1ec3m trung t\u00ednh c\u00f3 th\u1ec3 ti\u1ebfp c\u1eadn.<\/p>\n<p>M\u00e1y bi\u1ebfn \u00e1p d\u1ef1 \u0111\u1ecbnh v\u1eadn h\u00e0nh song song c\u1ea7n c\u00f3 t\u1ef7 s\u1ed1 bi\u1ebfn \u00e1p, c\u1ef1c t\u00ednh, th\u1ee9 t\u1ef1 pha, nh\u00f3m \u0111\u1ea5u d\u00e2y v\u00e0 t\u1ed5ng tr\u1edf t\u01b0\u01a1ng th\u00edch. C\u00e1c thi\u1ebft b\u1ecb c\u00f3 s\u1ed1 \u0111\u1ed3ng h\u1ed3 kh\u00e1c nhau c\u00f3 th\u1ec3 t\u1ea1o ra d\u00f2ng tu\u1ea7n ho\u00e0n nghi\u00eam tr\u1ecdng ho\u1eb7c ng\u1eafn m\u1ea1ch gi\u1eefa c\u00e1c pha khi n\u1ed1i c\u00e1c cu\u1ed9n th\u1ee9 c\u1ea5p c\u1ee7a ch\u00fang v\u1edbi nhau.<\/p>\n<h2>D\u00f2ng \u0111i\u1ec7n trung t\u00ednh, d\u00f2ng \u0111i\u1ec7n th\u1ee9 t\u1ef1 kh\u00f4ng v\u00e0 d\u00f2ng \u0111i\u1ec7n th\u1ee9 t\u1ef1 ngh\u1ecbch<\/h2><figure class=\"wp-block-image size-large\"><img decoding=\"async\" alt=\"Three-phase star and delta winding links\" loading=\"lazy\" src=\"https:\/\/lbajiele.com\/wp-content\/uploads\/2026\/08\/star-delta-transformer-connections.png\"\/><figcaption>Li\u00ean k\u1ebft d\u00e2y qu\u1ea5n h\u00ecnh sao v\u00e0 tam gi\u00e1c ba pha.<\/figcaption><\/figure>\n<p>D\u00e2y trung t\u00ednh h\u00ecnh sao \u0111\u01b0\u1ee3c k\u00e9o ra c\u00f3 th\u1ec3 c\u1ea5p ngu\u1ed3n cho c\u00e1c t\u1ea3i gi\u1eefa pha v\u00e0 trung t\u00ednh v\u00e0 c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c n\u1ed1i \u0111\u1ea5t \u0111\u1ec3 thi\u1ebft l\u1eadp m\u1ed9t \u0111i\u1ec3m chu\u1ea9n c\u1ee7a h\u1ec7 th\u1ed1ng. \u0110i\u1ec7n c\u1ef1c n\u1ed1i \u0111\u1ea5t, d\u00e2y d\u1eabn trung t\u00ednh, v\u1ecb tr\u00ed li\u00ean k\u1ebft v\u00e0 c\u00e1c quy \u0111\u1ecbnh v\u1ec1 h\u1ec7 th\u1ed1ng \u0111\u01b0\u1ee3c t\u00e1ch r\u1eddi ph\u1ea3i tu\u00e2n theo quy chu\u1ea9n hi\u1ec7n h\u00e0nh v\u00e0 nghi\u00ean c\u1ee9u h\u1ec7 th\u1ed1ng. Kh\u00f4ng th\u00eam m\u1ed9t m\u1ed1i li\u00ean k\u1ebft trung t\u00ednh - n\u1ed1i \u0111\u1ea5t th\u1ee9 hai ngo\u00e0i \u00fd mu\u1ed1n \u1edf ph\u00eda h\u1ea1 ngu\u1ed3n.<\/p>\n<p>Cu\u1ed9n tam gi\u00e1c cung c\u1ea5p m\u1ed9t \u0111\u01b0\u1eddng d\u1eabn b\u00ean trong cho c\u00e1c s\u00f3ng h\u00e0i b\u1eadc ba v\u00e0 m\u1ed9t s\u1ed1 d\u00f2ng th\u1ee9 t\u1ef1 kh\u00f4ng, \u0111\u1ed3ng th\u1eddi ng\u0103n ch\u1eb7n d\u00f2ng th\u1ee9 t\u1ef1 kh\u00f4ng truy\u1ec1n qua d\u01b0\u1edbi d\u1ea1ng d\u00f2ng d\u00e2y \u0111\u1ebfn ngu\u1ed3n tam gi\u00e1c. H\u00e0nh vi n\u00e0y \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn m\u1ee9c \u0111\u1ed9 ch\u1ea1m \u0111\u1ea5t v\u00e0 vi\u1ec7c l\u1ef1a ch\u1ecdn r\u01a1-le.<\/p>\n<h2>Ki\u1ec3m tra thi\u1ebft k\u1ebf k\u1ebft n\u1ed1i Tam gi\u00e1c - Sao<\/h2><figure class=\"wp-block-table is-style-stripes\"><table><thead><tr><th scope=\"col\">M\u1ee5c thi\u1ebft k\u1ebf<\/th><th scope=\"col\">B\u1edd s\u00f4ng Delta<\/th><th scope=\"col\">B\u1edd s\u00f4ng Wye<\/th><th scope=\"col\">T\u1ea1i sao \u0111i\u1ec1u \u0111\u00f3 quan tr\u1ecdng<\/th><\/tr><\/thead><tbody><tr><td>\u0110i\u1ec7n \u00e1p cu\u1ed9n d\u00e2y<\/td><td>B\u1eb1ng \u0111i\u1ec7n \u00e1p d\u00e2y<\/td><td>B\u1eb1ng \u0111i\u1ec7n \u00e1p d\u00e2y trung t\u00ednh<\/td><td>T\u00ednh to\u00e1n t\u1ef7 s\u1ed1 v\u00f2ng d\u00e2y<\/td><\/tr><tr><td>Trung l\u1eadp<\/td><td>Kh\u00f4ng c\u00f3 s\u1eb5n<\/td><td>C\u00f3 s\u1eb5n n\u1ebfu mang ra ngo\u00e0i<\/td><td>T\u1ea3i m\u1ed9t pha v\u00e0 n\u1ed1i \u0111\u1ea5t<\/td><\/tr><tr><td>\u0110\u1ed9 d\u1ecbch pha<\/td><td>Th\u00e0nh ph\u1ea7n nh\u00f3m v\u00e9c-t\u01a1<\/td><td>\u0110\u00e3 d\u1ecbch chuy\u1ec3n 30 \u0111\u1ed9<\/td><td>B\u1ea3o v\u1ec7 song song v\u00e0 b\u1ea3o v\u1ec7 so l\u1ec7ch<\/td><\/tr><tr><td>Th\u1ee9 t\u1ef1 kh\u00f4ng<\/td><td>L\u01b0u h\u00e0nh n\u1ed9i b\u1ed9<\/td><td>Ph\u1ee5 thu\u1ed9c v\u00e0o n\u1ed1i \u0111\u1ea5t trung t\u00ednh<\/td><td>D\u00f2ng \u0111i\u1ec7n ch\u1ea1m \u0111\u1ea5t v\u00e0 c\u00e1c r\u01a1-le<\/td><\/tr><tr><td>K\u00fd hi\u1ec7u th\u00f4ng th\u01b0\u1eddng<\/td><td>D<\/td><td>y ho\u1eb7c yn<\/td><td>X\u00e1c \u0111\u1ecbnh k\u1ebft n\u1ed1i v\u00e0 quy\u1ec1n truy c\u1eadp trung t\u00ednh<\/td><\/tr><\/tbody><\/table><\/figure>\n<h2>B\u1ea3o v\u1ec7, Ki\u1ec3m tra v\u00e0 Th\u00ed nghi\u1ec7m<\/h2>\n<p>R\u01a1-le so l\u1ec7ch m\u00e1y bi\u1ebfn \u00e1p ph\u1ea3i b\u00f9 t\u1ec9 s\u1ed1 v\u00e0 \u0111\u1ed9 l\u1ec7ch pha 30 \u0111\u1ed9, ho\u1eb7c th\u00f4ng qua \u0111\u1ea5u n\u1ed1i bi\u1ebfn d\u00f2ng (CT) ho\u1eb7c b\u1eb1ng s\u1ed1. B\u1ea3o v\u1ec7 ch\u1ea1m \u0111\u1ea5t ph\u1ea3i ph\u1ea3n \u00e1nh vi\u1ec7c trung t\u00ednh \u0111\u1ea5u sao c\u00f3 \u0111\u01b0\u1ee3c n\u1ed1i \u0111\u1ea5t hay kh\u00f4ng v\u00e0 v\u1ecb tr\u00ed \u0111\u1eb7t c\u00e1c bi\u1ebfn d\u00f2ng (CT). T\u00ednh n\u0103ng h\u00e3m d\u00f2ng kh\u1edfi \u0111\u1ed9ng (inrush) v\u00e0 ph\u1ed1i h\u1ee3p qu\u00e1 d\u00f2ng v\u1eabn l\u00e0 nh\u1eefng y\u1ebfu t\u1ed1 c\u1ea7n thi\u1ebft.<\/p>\n<p>Tr\u01b0\u1edbc khi \u0111\u00f3ng \u0111i\u1ec7n, h\u00e3y x\u00e1c \u0111\u1ecbnh l\u1ea1i t\u1ed5 \u0111\u1ea5u d\u00e2y tr\u00ean nh\u00e3n m\u00e1y, k\u00fd hi\u1ec7u \u0111\u1ea7u c\u1ef1c, chi\u1ec1u quay pha, t\u1ef7 s\u1ed1 bi\u1ebfn \u1edf m\u1ecdi n\u1ea5c ph\u00e2n \u00e1p, \u0111i\u1ec7n tr\u1edf cu\u1ed9n d\u00e2y v\u00e0 c\u00e1c k\u1ebft qu\u1ea3 c\u00e1ch \u0111i\u1ec7n. Th\u1eed nghi\u1ec7m g\u00f3c pha ho\u1eb7c t\u1ed5 \u0111\u1ea5u d\u00e2y cung c\u1ea5p b\u1eb1ng ch\u1ee9ng x\u00e1c th\u1ef1c h\u01a1n so v\u1edbi vi\u1ec7c ch\u1ec9 ki\u1ec3m tra t\u00ednh li\u00ean t\u1ee5c.<\/p>\n<h2>X\u00e1c th\u1ef1c k\u1ef9 thu\u1eadt v\u00e0 Gi\u1edbi h\u1ea1n an to\u00e0n<\/h2><p>H\u01b0\u1edbng d\u1eabn n\u00e0y h\u1ed7 tr\u1ee3 vi\u1ec7c l\u1eadp th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt v\u00e0 mua s\u1eafm; t\u00e0i li\u1ec7u n\u00e0y kh\u00f4ng thay th\u1ebf cho nghi\u00ean c\u1ee9u d\u1ef1 \u00e1n, quy chu\u1ea9n hi\u1ec7n h\u00e0nh, h\u01b0\u1edbng d\u1eabn c\u1ee7a nh\u00e0 s\u1ea3n xu\u1ea5t ho\u1eb7c c\u00f4ng vi\u1ec7c c\u1ee7a nh\u00e2n vi\u00ean \u0111i\u1ec7n c\u00f3 chuy\u00ean m\u00f4n. H\u00e3y x\u00e1c minh c\u00e1c n\u1ed9i dung sau tr\u01b0\u1edbc khi l\u1ef1a ch\u1ecdn thi\u1ebft b\u1ecb, th\u1eed nghi\u1ec7m, \u0111\u1ea5u d\u00e2y ho\u1eb7c \u0111\u00f3ng \u0111i\u1ec7n:<\/p><ul><li>X\u00e1c \u0111\u1ecbnh c\u1ef1c t\u00ednh \u0111\u1ea7u c\u1ef1c, th\u1ee9 t\u1ef1 pha v\u00e0 nh\u00f3m v\u00e9c-t\u01a1 t\u1eeb bi\u00ean b\u1ea3n th\u1eed nghi\u1ec7m.<\/li><li>T\u00ednh to\u00e1n \u0111i\u1ec7n \u00e1p cu\u1ed9n d\u00e2y tr\u01b0\u1edbc khi ch\u1ecdn t\u1ef7 s\u1ed1 v\u00f2ng d\u00e2y ho\u1eb7c \u0111i\u1ec7n \u00e1p th\u1eed nghi\u1ec7m.<\/li><li>Xem x\u00e9t vi\u1ec7c n\u1ed1i \u0111\u1ea5t v\u00e0 t\u1ea3i d\u00e2y trung t\u00ednh, bao g\u1ed3m c\u1ea3 c\u00e1c th\u00e0nh ph\u1ea7n s\u00f3ng h\u00e0i c\u1ee7a t\u1ea3i phi tuy\u1ebfn.<\/li><li>Ph\u1ed1i h\u1ee3p b\u1ea3o v\u1ec7 so l\u1ec7ch v\u00e0 b\u1ea3o v\u1ec7 ch\u1ea1m \u0111\u1ea5t v\u1edbi \u0111\u1ea5u n\u1ed1i th\u1ef1c t\u1ebf.<\/li><li>C\u1ea5m ch\u1ea1y song song cho \u0111\u1ebfn khi t\u1ef7 s\u1ed1, g\u00f3c pha v\u00e0 \u0111\u1ed9 t\u01b0\u01a1ng th\u00edch t\u1ed5ng tr\u1edf \u0111\u00e3 \u0111\u01b0\u1ee3c ch\u1ee9ng minh.<\/li><\/ul>\n<h2>Th\u00f4ng tin c\u1ea7n \u0111\u01b0a v\u00e0o Y\u00eau c\u1ea7u b\u00e1o gi\u00e1<\/h2><p>M\u1ed9t b\u00e1o gi\u00e1 h\u1eefu \u00edch ph\u1ea3i d\u1ef1a tr\u00ean c\u00f9ng m\u1ed9t ranh gi\u1edbi k\u1ef9 thu\u1eadt cho m\u1ecdi nh\u00e0 cung c\u1ea5p. H\u00e3y bao g\u1ed3m c\u00e1c th\u00f4ng tin sau v\u00e0 y\u00eau c\u1ea7u li\u1ec7t k\u00ea r\u00f5 r\u00e0ng m\u1ecdi sai l\u1ec7ch:<\/p><ul><li>\u0110i\u1ec7n \u00e1p \u0111\u01b0\u1eddng d\u00e2y s\u01a1 c\u1ea5p v\u00e0 th\u1ee9 c\u1ea5p, kVA, t\u1ea7n s\u1ed1 v\u00e0 d\u1ea3i ph\u00e2n \u00e1p.<\/li><li>Nh\u00f3m vector y\u00eau c\u1ea7u v\u00e0 c\u00f3 \u0111\u01b0a \u0111\u1ea7u trung t\u00ednh c\u1ee7a \u0111\u1ea5u sao ra ngo\u00e0i hay kh\u00f4ng.<\/li><li>Ph\u01b0\u01a1ng ph\u00e1p n\u1ed1i \u0111\u1ea5t, d\u00f2ng \u0111i\u1ec7n trung t\u00ednh v\u00e0 m\u1ea5t c\u00e2n b\u1eb1ng t\u1ea3i.<\/li><li>Tr\u1edf kh\u00e1ng, m\u1ee9c s\u1ef1 c\u1ed1 v\u00e0 c\u00e1c y\u00eau c\u1ea7u v\u1eadn h\u00e0nh song song.<\/li><li>S\u01a1 \u0111\u1ed3 c\u1ef1c d\u00f2ng, b\u00e1o c\u00e1o ki\u1ec3m tra g\u00f3c pha v\u00e0 d\u1eef li\u1ec7u giao di\u1ec7n b\u1ea3o v\u1ec7.<\/li><\/ul>\n<h2>T\u1eeb D\u1eef li\u1ec7u K\u1ef9 thu\u1eadt \u0111\u1ebfn m\u1ed9t Quy\u1ebft \u0111\u1ecbnh \u0111\u01b0\u1ee3c Ph\u00ea duy\u1ec7t<\/h2><p>S\u1eed d\u1ee5ng ph\u01b0\u01a1ng ph\u00e1p \u0111\u00e1nh gi\u00e1 theo t\u1eebng giai \u0111o\u1ea1n thay v\u00ec ph\u00ea duy\u1ec7t ngay k\u1ebft qu\u1ea3 kh\u1edbp danh m\u1ee5c \u0111\u1ea7u ti\u00ean. B\u1eaft \u0111\u1ea7u v\u1edbi m\u1ed1i quan h\u1ec7 \u0111i\u1ec7n \u00e1p h\u00ecnh sao v\u00e0 h\u00ecnh tam gi\u00e1c, sau \u0111\u00f3 \u0111\u1ed1i chi\u1ebfu \u0111\u1ed9 l\u1ec7ch pha ba m\u01b0\u01a1i \u0111\u1ed9 v\u00e0 c\u00e1c nh\u00f3m v\u00e9c-t\u01a1 v\u1edbi d\u00f2ng \u0111i\u1ec7n trung t\u00ednh, n\u1ed1i \u0111\u1ea5t v\u00e0 th\u1ee9 t\u1ef1 kh\u00f4ng. Ho\u00e0n t\u1ea5t vi\u1ec7c \u0111\u00e1nh gi\u00e1 b\u1eb1ng c\u00e1c kh\u00e2u b\u1ea3o v\u1ec7, th\u1eed nghi\u1ec7m v\u00e0 ch\u1ea1y th\u1eed. \u1ede m\u1ed7i giai \u0111o\u1ea1n, h\u00e3y ghi l\u1ea1i t\u00e0i li\u1ec7u ngu\u1ed3n, \u0111\u01a1n v\u1ecb, tr\u01b0\u1eddng h\u1ee3p v\u1eadn h\u00e0nh v\u00e0 ng\u01b0\u1eddi ch\u1ecbu tr\u00e1ch nhi\u1ec7m ph\u00ea duy\u1ec7t. \u0110i\u1ec1u n\u00e0y gi\u00fap ng\u0103n ch\u1eb7n vi\u1ec7c m\u1ed9t gi\u00e1 tr\u1ecb \u0111\u01b0\u1ee3c sao ch\u00e9p t\u1eeb b\u1ea3n v\u1ebd c\u0169, nh\u00e3n h\u1ec7 th\u1ed1ng danh \u0111\u1ecbnh ho\u1eb7c s\u1ea3n ph\u1ea9m kh\u00f4ng li\u00ean quan tr\u1edf th\u00e0nh \u0111\u1ea7u v\u00e0o thi\u1ebft k\u1ebf kh\u00f4ng ki\u1ec3m so\u00e1t.<\/p><p>Tr\u01b0\u1edbc khi nghi\u1ec7m thu, h\u00e3y so s\u00e1nh ph\u1ea3n h\u1ed3i c\u1ee7a nh\u00e0 th\u1ea7u t\u1eebng d\u00f2ng m\u1ed9t v\u1edbi Y\u00eau c\u1ea7u b\u00e1o gi\u00e1 (RFQ) v\u00e0 \u0111\u00e1nh d\u1ea5u m\u1ecdi \u0111i\u1ec3m ngo\u1ea1i l\u1ec7. X\u00e1c nh\u1eadn r\u1eb1ng c\u00e1c b\u1ea3n v\u1ebd, t\u00ednh to\u00e1n, th\u00f4ng s\u1ed1 c\u00e0i \u0111\u1eb7t, ch\u1ee9ng ch\u1ec9 v\u00e0 b\u00e1o c\u00e1o th\u1eed nghi\u1ec7m \u0111\u1ec1u \u0111\u1ec1 c\u1eadp ch\u00ednh x\u00e1c \u0111\u1ebfn m\u1eabu v\u00e0 phi\u00ean b\u1ea3n \u0111\u01b0\u1ee3c ch\u00e0o th\u1ea7u. L\u01b0u gi\u1eef h\u1ed3 s\u01a1 tr\u00ecnh duy\u1ec7t \u0111\u00e3 \u0111\u01b0\u1ee3c ph\u00ea duy\u1ec7t, d\u1eef li\u1ec7u tr\u00ean nh\u00e3n thi\u1ebft b\u1ecb, k\u1ebft qu\u1ea3 th\u1eed nghi\u1ec7m t\u1ea1i x\u01b0\u1edfng v\u00e0 c\u00e1c th\u00f4ng s\u1ed1 \u0111o \u0111\u1ea1c khi ch\u1ea1y th\u1eed l\u00e0m c\u01a1 s\u1edf b\u1ea3o tr\u00ec. N\u1ebfu c\u00f3 s\u1ef1 thay \u0111\u1ed5i v\u1ec1 \u0111\u1ecbnh m\u1ee9c, k\u1ebft n\u1ed1i, m\u00f4i tr\u01b0\u1eddng ho\u1eb7c \u0111i\u1ec1u ki\u1ec7n th\u1eed nghi\u1ec7m, h\u00e3y l\u1eb7p l\u1ea1i vi\u1ec7c \u0111\u00e1nh gi\u00e1 \u0111\u1ed1i v\u1edbi ph\u1ea7n b\u1ecb \u1ea3nh h\u01b0\u1edfng thay v\u00ec gi\u1ea3 \u0111\u1ecbnh r\u1eb1ng k\u1ebft lu\u1eadn ban \u0111\u1ea7u v\u1eabn c\u00f2n gi\u00e1 tr\u1ecb.<\/p>\n<p>Vi\u1ec7c ki\u1ec3m so\u00e1t t\u00e0i li\u1ec7u ph\u1ea3i x\u00e1c \u0111\u1ecbnh \u0111\u01b0\u1ee3c phi\u00ean b\u1ea3n, tr\u1ea1ng th\u00e1i ph\u00ea duy\u1ec7t v\u00e0 c\u00e1c t\u1ec7p b\u1ecb thay th\u1ebf. C\u00e1c \u0111\u1ed9i ng\u0169 hi\u1ec7n tr\u01b0\u1eddng ph\u1ea3i nh\u1eadn \u0111\u01b0\u1ee3c c\u00e1c gi\u00e1 tr\u1ecb \u0111\u00e3 \u0111\u01b0\u1ee3c ph\u00ea duy\u1ec7t gi\u1ed1ng nhau \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng cho vi\u1ec7c mua s\u1eafm, trong khi c\u00e1c h\u1ed3 s\u01a1 ch\u1ea1y th\u1eed ph\u1ea3i ghi l\u1ea1i m\u1ecdi thay \u0111\u1ed5i \u0111\u01b0\u1ee3c \u1ee7y quy\u1ec1n th\u1ef1c hi\u1ec7n trong qu\u00e1 tr\u00ecnh l\u1eafp \u0111\u1eb7t. Kh\u1ea3 n\u0103ng truy xu\u1ea5t ngu\u1ed3n g\u1ed1c n\u00e0y \u0111\u1eb7c bi\u1ec7t quan tr\u1ecdng khi thi\u1ebft b\u1ecb \u0111\u01b0\u1ee3c thay th\u1ebf nhi\u1ec1u n\u0103m sau \u0111\u00f3: k\u1ef9 s\u01b0 ti\u1ebfp theo c\u1ea7n c\u00e1c giao di\u1ec7n \u0111\u00e3 \u0111\u01b0\u1ee3c x\u00e1c minh v\u00e0 l\u1ecbch s\u1eed ki\u1ec3m tra, ch\u1ee9 kh\u00f4ng ph\u1ea3i l\u00e0 m\u1ed9t m\u00f4 t\u1ea3 ch\u01b0a \u0111\u1ea7y \u0111\u1ee7 \u0111\u01b0\u1ee3c sao ch\u00e9p t\u1eeb \u0111\u01a1n \u0111\u1eb7t h\u00e0ng.<\/p>\n<h2>Th\u00f4ng tin bao qu\u00e1t d\u1ef1a tr\u00ean k\u1ebft qu\u1ea3 t\u00ecm ki\u1ebfm hi\u1ec7n t\u1ea1i<\/h2><p>Top 20 b\u00e0i \u0111\u00e1nh gi\u00e1 h\u00e0ng \u0111\u1ea7u hi\u1ec7n t\u1ea1i tr\u00ean Google t\u1ea1i M\u1ef9 li\u00ean t\u1ee5c \u0111\u1ec1 c\u1eadp \u0111\u1ebfn c\u00e1c ch\u1ee7 \u0111\u1ec1 bao g\u1ed3m K\u1ebft n\u1ed1i H\u00ecnh sao (Y), K\u1ebft n\u1ed1i Tam gi\u00e1c (\u0394), H\u00ecnh sao - H\u00ecnh sao (Y-Y), T\u00f4i c\u00f3 hai m\u00e1y bi\u1ebfn \u00e1p Tam gi\u00e1c - H\u00ecnh sao \u0111\u01b0\u1ee3c l\u1eafp \u0111\u1eb7t trong c\u1ea5u h\u00ecnh m\u1ea1ch ch\u00ednh - li\u00ean l\u1ea1c - ch\u00ednh (main-tie-main). M\u1ed9t chi\u1ebfc b\u1ecb h\u1ecfng, t\u00f4i c\u00f3 th\u1ec3 thay th\u1ebf chi\u1ebfc b\u1ecb h\u1ecfng b\u1eb1ng m\u00e1y bi\u1ebfn \u00e1p H\u00ecnh sao - H\u00ecnh sao kh\u00f4ng?, S\u1ef1 kh\u00e1c bi\u1ec7t gi\u1eefa h\u1ec7 th\u1ed1ng Tam gi\u00e1c v\u00e0 H\u00ecnh sao l\u00e0 g\u00ec?. B\u00e0i vi\u1ebft gi\u1ea3i quy\u1ebft c\u00e1c nhu c\u1ea7u \u0111\u00f3 c\u1ee7a ng\u01b0\u1eddi d\u00f9ng theo tr\u00ecnh t\u1ef1 k\u1ef9 thu\u1eadt v\u00e0 thu mua nguy\u00ean b\u1ea3n; th\u00f4ng\u0632 tin \u0111i\u1ec1u h\u01b0\u1edbng th\u01b0\u01a1ng hi\u1ec7u c\u1ee7a \u0111\u1ed1i th\u1ee7 c\u1ea1nh tranh v\u00e0 t\u00e0i li\u1ec7u b\u00e1n h\u00e0ng kh\u00f4ng li\u00ean quan \u0111\u00e3 b\u1ecb lo\u1ea1i b\u1ecf.<\/p>\n<h2>T\u00e0i li\u1ec7u LBAJI li\u00ean quan<\/h2><p>Ti\u1ebfp t\u1ee5c v\u1edbi <a href=\"https:\/\/lbajiele.com\/vi\/blog\/complete-guide-to-transformer-voltage-connections-vector-groups\/\">h\u01b0\u1edbng d\u1eabn \u0111i\u1ec7n \u00e1p v\u00e0 nh\u00f3m \u0111\u1ea5u d\u00e2y m\u00e1y bi\u1ebfn \u00e1p<\/a> <a href=\"https:\/\/lbajiele.com\/vi\/blog\/transformer-wiring-diagram-wiring-and-diagram-guide\/\">h\u01b0\u1edbng d\u1eabn s\u01a1 \u0111\u1ed3 \u0111\u1ea5u d\u00e2y m\u00e1y bi\u1ebfn \u00e1p<\/a> <a href=\"https:\/\/lbajiele.com\/vi\/danh-muc-san-pham\/transformer\/\">c\u00e1c s\u1ea3n ph\u1ea9m m\u00e1y bi\u1ebfn \u00e1p ba pha<\/a>. Nh\u1eefng t\u00e0i nguy\u00ean n\u00e0y gi\u00fap k\u1ebft n\u1ed1i vi\u1ec7c t\u00ednh to\u00e1n ho\u1eb7c quy\u1ebft \u0111\u1ecbnh l\u1ef1a ch\u1ecdn linh ki\u1ec7n v\u1edbi m\u1ed9t b\u1ea3ng th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt ho\u00e0n ch\u1ec9nh c\u1ee7a m\u00e1y bi\u1ebfn \u00e1p, thi\u1ebft b\u1ecb \u0111\u00f3ng c\u1eaft, thi\u1ebft b\u1ecb \u0111i\u1ec1u khi\u1ec3n ho\u1eb7c thi\u1ebft b\u1ecb ph\u00e2n ph\u1ed1i.<\/p>\n<div id=\"rank-math-faq\" class=\"rank-math-block\">\n<div class=\"rank-math-list\">\n<\/div>\n<\/div>\n<section class=\"lbaji-technical-references\"><h2>T\u00e0i li\u1ec7u tham kh\u1ea3o k\u1ef9 thu\u1eadt v\u00e0 \u0110\u1ecdc th\u00eam<\/h2><ul><li><a href=\"https:\/\/webstore.iec.ch\/en\/publication\/588\" rel=\"noopener noreferrer nofollow\" target=\"_blank\">M\u00e1y bi\u1ebfn \u00e1p \u0111i\u1ec7n l\u1ef1c IEC 60076-1<\/a> \u2014 C\u00e1c k\u00fd hi\u1ec7u k\u1ebft n\u1ed1i v\u00e0 c\u00e1c y\u00eau c\u1ea7u \u0111\u1ed1i v\u1edbi m\u00e1y bi\u1ebfn \u00e1p.<\/li><li><a href=\"https:\/\/standards.ieee.org\/\" rel=\"noopener noreferrer nofollow\" target=\"_blank\">Ti\u00eau chu\u1ea9n m\u00e1y bi\u1ebfn \u00e1p c\u1ee7a Hi\u1ec7p h\u1ed9i Ti\u00eau chu\u1ea9n IEEE<\/a> \u2014 Ti\u00eau chu\u1ea9n \u0111\u1ea5u n\u1ed1i, th\u1eed nghi\u1ec7m v\u00e0 b\u1ea3o v\u1ec7 m\u00e1y bi\u1ebfn \u00e1p.<\/li><li><a href=\"https:\/\/www.nfpa.org\/codes-and-standards\" rel=\"noopener noreferrer nofollow\" target=\"_blank\">C\u00e1c quy chu\u1ea9n v\u00e0 ti\u00eau chu\u1ea9n NFPA<\/a> \u2014 C\u00e1c y\u00eau c\u1ea7u v\u1ec1 l\u1eafp \u0111\u1eb7t v\u00e0 n\u1ed1i \u0111\u1ea5t h\u1ec7 th\u1ed1ng \u0111i\u1ec7n.<\/li><\/ul><\/section>\n<h2>K\u1ebft lu\u1eadn<\/h2><p>M\u1ed9t k\u1ebft n\u1ed1i tam gi\u00e1c-sao n\u00ean \u0111\u01b0\u1ee3c ch\u1ec9 \u0111\u1ecbnh b\u1eb1ng nh\u00f3m v\u00e9c-t\u01a1, ch\u1ee9 kh\u00f4ng ch\u1ec9 \u0111\u01a1n thu\u1ea7n b\u1eb1ng c\u00e1c t\u1eeb tam gi\u00e1c v\u00e0 sao. C\u1ea7n ph\u1ea3i x\u00e1c \u0111\u1ecbnh ch\u00ednh x\u00e1c g\u00f3c pha, n\u1ed1i \u0111\u1ea5t trung t\u00ednh, th\u1ee9 t\u1ef1 kh\u00f4ng v\u00e0 c\u00e1c quy\u1ebft \u0111\u1ecbnh b\u1ea3o v\u1ec7 tr\u01b0\u1edbc khi \u0111\u1ea5u d\u00e2y, th\u1eed nghi\u1ec7m ho\u1eb7c ch\u1ea1y song song.<\/p>","protected":false},"excerpt":{"rendered":"<p>K\u1ebft n\u1ed1i m\u00e1y bi\u1ebfn \u00e1p tam gi\u00e1c-sao s\u1eed d\u1ee5ng m\u1ed9t m\u1ea1ch tam gi\u00e1c k\u00edn \u1edf m\u1ed9t cu\u1ed9n d\u00e2y v\u00e0 m\u1ed9t \u0111\u1ea5u sao c\u00f3 n\u1ed1i \u0111\u1ea5t ho\u1eb7c kh\u00f4ng n\u1ed1i \u0111\u1ea5t \u1edf cu\u1ed9n d\u00e2y kia, t\u1ea1o ra \u0111\u1ed9 l\u1ec7ch pha 30 \u0111\u1ed9 v\u00e0 cung c\u1ea5p m\u1ed9t \u0111i\u1ec3m trung t\u00ednh khi \u0111\u1ea7u n\u1ed1i sao \u0111\u01b0\u1ee3c \u0111\u01b0a ra ngo\u00e0i.<\/p>","protected":false},"author":6,"featured_media":2858,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[52],"tags":[64,73],"class_list":["post-2859","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-transformers","tag-three-phase-transformer","tag-transformer-connections"],"blocksy_meta":[],"acf":[],"_links":{"self":[{"href":"https:\/\/lbajiele.com\/vi\/wp-json\/wp\/v2\/posts\/2859","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\/6"}],"replies":[{"embeddable":true,"href":"https:\/\/lbajiele.com\/vi\/wp-json\/wp\/v2\/comments?post=2859"}],"version-history":[{"count":1,"href":"https:\/\/lbajiele.com\/vi\/wp-json\/wp\/v2\/posts\/2859\/revisions"}],"predecessor-version":[{"id":3007,"href":"https:\/\/lbajiele.com\/vi\/wp-json\/wp\/v2\/posts\/2859\/revisions\/3007"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/lbajiele.com\/vi\/wp-json\/wp\/v2\/media\/2858"}],"wp:attachment":[{"href":"https:\/\/lbajiele.com\/vi\/wp-json\/wp\/v2\/media?parent=2859"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/lbajiele.com\/vi\/wp-json\/wp\/v2\/categories?post=2859"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/lbajiele.com\/vi\/wp-json\/wp\/v2\/tags?post=2859"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}