{"id":2885,"date":"2026-08-28T22:03:00","date_gmt":"2026-08-28T22:03:00","guid":{"rendered":"https:\/\/lbajiele.com\/?p=2885"},"modified":"2026-08-25T12:10:13","modified_gmt":"2026-08-25T12:10:13","slug":"delta-to-delta-connected-transformer-guide","status":"publish","type":"post","link":"https:\/\/lbajiele.com\/vi\/blog\/delta-to-delta-connected-transformer-guide\/","title":{"rendered":"K\u1ebft n\u1ed1i m\u00e1y bi\u1ebfn \u00e1p Delta-Delta: Nguy\u00ean l\u00fd ho\u1ea1t \u0111\u1ed9ng v\u00e0 \u1ee8ng d\u1ee5ng"},"content":{"rendered":"<p><strong>M\u00e1y bi\u1ebfn \u00e1p \u0111\u1ea5u tam gi\u00e1c-tam gi\u00e1c (delta-delta) c\u00f3 c\u1ea3 cu\u1ed9n d\u00e2y s\u01a1 c\u1ea5p v\u00e0 th\u1ee9 c\u1ea5p \u0111\u01b0\u1ee3c \u0111\u1ea5u theo h\u00ecnh tam gi\u00e1c k\u00edn, do \u0111\u00f3 \u0111i\u1ec7n \u00e1p d\u00e2y b\u1eb1ng \u0111i\u1ec7n \u00e1p pha c\u1ee7a cu\u1ed9n d\u00e2y \u1edf m\u1ed7i b\u00ean v\u00e0 kh\u00f4ng c\u00f3 \u0111i\u1ec3m trung t\u00ednh n\u1ed9i t\u1ea1i; n\u00f3 c\u0169ng c\u00f3 \u0111\u1ed9 l\u1ec7ch pha b\u1eb1ng kh\u00f4ng cho c\u00e1c \u0111\u1ea5u n\u1ed1i c\u1ef1c t\u01b0\u01a1ng \u1ee9ng.<\/strong> S\u01a1 \u0111\u1ed3 n\u00e0y x\u1eed l\u00fd c\u00e1c t\u1ea3i ba pha c\u00e2n b\u1eb1ng v\u00e0 s\u00f3ng h\u00e0i b\u1eadc ba nh\u01b0ng \u0111\u00f2i h\u1ecfi ph\u1ea3i n\u1ed1i \u0111\u1ea5t c\u00f3 ch\u1ee7 \u0111\u00edch v\u00e0 b\u1ea3o v\u1ec7 s\u1ef1 c\u1ed1 ch\u1ea1m \u0111\u1ea5t. V\u1eadn h\u00e0nh m\u1ea1ch tam gi\u00e1c h\u1edf ch\u1ec9 kh\u1ea3 thi \u1edf c\u00f4ng su\u1ea5t gi\u1ea3m v\u00e0 c\u00f3 c\u00e1c gi\u1edbi h\u1ea1n k\u1ef9 thu\u1eadt.<\/p>\n<div class=\"lbaji-key-takeaways\"><h2>Nh\u1eefng \u0111i\u1ec3m ch\u00ednh<\/h2><ul><li>\u0110i\u1ec7n \u00e1p d\u00e2y b\u1eb1ng \u0111i\u1ec7n \u00e1p cu\u1ed9n d\u00e2y trong m\u1ea1ch tam gi\u00e1c.<\/li><li>Kh\u00f4ng c\u00f3 d\u00e2y trung t\u00ednh n\u1ebfu kh\u00f4ng \u0111\u01b0\u1ee3c l\u1ea5y ri\u00eang bi\u1ec7t.<\/li><li>Delta h\u1edf ch\u1ec9 cung c\u1ea5p kho\u1ea3ng 57,71 TP3T so v\u1edbi c\u00f4ng su\u1ea5t kVA ban \u0111\u1ea7u c\u1ee7a m\u1ea1ch.<\/li><\/ul><\/div>\n<h2>T\u1ef7 s\u1ed1 \u0111i\u1ec7n \u00e1p v\u00e0 quan h\u1ec7 pha<\/h2><figure class=\"wp-block-image size-large\"><img decoding=\"async\" alt=\"Transformer delta terminal links\" loading=\"lazy\" src=\"https:\/\/lbajiele.com\/wp-content\/uploads\/2026\/08\/delta-star-terminal-connections.png\"\/><figcaption>Li\u00ean k\u1ebft \u0111\u1ea7u c\u1ef1c tam gi\u00e1c c\u1ee7a m\u00e1y bi\u1ebfn \u00e1p.<\/figcaption><\/figure>\n<p>V\u00ec m\u1ed7i cu\u1ed9n d\u00e2y tam gi\u00e1c \u0111\u01b0\u1ee3c n\u1ed1i gi\u1eefa d\u00e2y pha v\u1edbi d\u00e2y pha, t\u1ef7 s\u1ed1 \u0111i\u1ec7n \u00e1p d\u00e2y b\u1eb1ng t\u1ef7 s\u1ed1 v\u00f2ng d\u00e2y cu\u1ed9n d\u00e2y. C\u00e1c \u0111\u1ea5u n\u1ed1i tam gi\u00e1c t\u01b0\u01a1ng \u1ee9ng c\u00f3 th\u1ec3 t\u1ea1o ra \u0111\u1ed9 l\u1ec7ch pha b\u1eb1ng kh\u00f4ng, nh\u01b0ng c\u1ef1c t\u00ednh \u0111\u1ea7u c\u1ef1c v\u00e0 th\u1ee9 t\u1ef1 pha v\u1eabn c\u1ea7n ph\u1ea3i \u0111\u01b0\u1ee3c ki\u1ec3m tra x\u00e1c minh.<\/p>\n<p>M\u1ed9t m\u1ed1i n\u1ed1i g\u00f3c b\u1ecb thay \u0111\u1ed5i c\u00f3 th\u1ec3 \u0111\u1ea3o ng\u01b0\u1ee3c th\u1ee9 t\u1ef1 pha ho\u1eb7c t\u1ea1o ra m\u1ed9t g\u00f3c kh\u00f4ng mong mu\u1ed1n. H\u00e3y s\u1eed d\u1ee5ng gi\u1ea3n \u0111\u1ed3 vect\u01a1 v\u00e0 ph\u00e9p th\u1eed g\u00f3c pha, thay v\u00ec ch\u1ec9 d\u1ef1a v\u00e0o t\u00ednh li\u00ean t\u1ee5c.<\/p>\n<h2>Trung t\u00ednh, N\u1ed1i \u0111\u1ea5t v\u00e0 S\u1ef1 c\u1ed1 ch\u1ea1m \u0111\u1ea5t<\/h2>\n<p>M\u1ea1ch tam gi\u00e1c h\u1edf kh\u00f4ng c\u00f3 \u0111i\u1ec3m trung t\u00ednh t\u1ef1 nhi\u00ean. C\u00e1c h\u1ec7 th\u1ed1ng c\u00f3 th\u1ec3 v\u1eadn h\u00e0nh \u1edf tr\u1ea1ng th\u00e1i kh\u00f4ng n\u1ed1i \u0111\u1ea5t, n\u1ed1i \u0111\u1ea5t g\u00f3c ho\u1eb7c s\u1eed d\u1ee5ng m\u00e1y bi\u1ebfn \u00e1p n\u1ed1i \u0111\u1ea5t t\u00f9y thu\u1ed9c v\u00e0o thi\u1ebft k\u1ebf v\u00e0 quy chu\u1ea9n. M\u1ed7i l\u1ef1a ch\u1ecdn \u0111\u1ec1u l\u00e0m thay \u0111\u1ed5i d\u00f2ng s\u1ef1 c\u1ed1, qu\u00e1 \u00e1p v\u00e0 \u0111\u1eb7c t\u00ednh b\u1ea3o v\u1ec7.<\/p>\n<p>H\u1ec7 th\u1ed1ng kh\u00f4ng n\u1ed1i \u0111\u1ea5t c\u00f3 th\u1ec3 ti\u1ebfp t\u1ee5c ho\u1ea1t \u0111\u1ed9ng sau m\u1ed9t s\u1ef1 c\u1ed1 ch\u1ea1m \u0111\u1ea5t \u0111\u1ea7u ti\u00ean nh\u01b0ng c\u00f3 th\u1ec3 g\u1eb7p hi\u1ec7n t\u01b0\u1ee3ng \u0111i\u1ec7n \u00e1p pha-\u0111\u1ea5t t\u0103ng cao v\u00e0 \u0111\u00f2i h\u1ecfi ph\u1ea3i gi\u00e1m s\u00e1t c\u00e1ch \u0111i\u1ec7n c\u0169ng nh\u01b0 \u0111\u1ecbnh v\u1ecb s\u1ef1 c\u1ed1 k\u1ecbp th\u1eddi.<\/p>\n<h2>S\u00f3ng h\u00e0i v\u00e0 t\u1ea3i m\u1ea5t c\u00e2n b\u1eb1ng<\/h2><figure class=\"wp-block-image size-large\"><img decoding=\"async\" alt=\"Three-phase transformer connections\" loading=\"lazy\" src=\"https:\/\/lbajiele.com\/wp-content\/uploads\/2026\/08\/parallel-transformer-connections.png\"\/><figcaption>C\u00e1c ki\u1ec3u n\u1ed1i m\u00e1y bi\u1ebfn \u00e1p ba pha.<\/figcaption><\/figure>\n<p>M\u1ea1ch delta k\u00edn cung c\u1ea5p m\u1ed9t \u0111\u01b0\u1eddng d\u1eabn tu\u1ea7n ho\u00e0n cho d\u00f2ng \u0111i\u1ec7n t\u1eeb h\u00f3a s\u00f3ng h\u00e0i b\u1eadc ba, gi\u00fap ng\u0103n ng\u1eeba s\u1ef1 m\u00e9o d\u1ea1ng d\u1ea1ng s\u00f3ng xu\u1ea5t hi\u1ec7n d\u01b0\u1edbi d\u1ea1ng d\u00f2ng \u0111i\u1ec7n d\u00e2y. D\u00f2ng \u0111i\u1ec7n n\u1ed9i b\u1ed9 n\u00e0y g\u00f3p ph\u1ea7n l\u00e0m n\u00f3ng cu\u1ed9n d\u00e2y v\u00e0 ch\u1ebf \u0111\u1ed9 l\u00e0m vi\u1ec7c theo thi\u1ebft k\u1ebf.<\/p>\n<p>M\u1ea1ch tam gi\u00e1c (Delta) c\u00f3 th\u1ec3 c\u1ea5p ngu\u1ed3n cho c\u00e1c t\u1ea3i l\u1ec7ch pha trong gi\u1edbi h\u1ea1n c\u1ee7a cu\u1ed9n d\u00e2y v\u00e0 tr\u1ea1m bi\u1ebfn \u00e1p, nh\u01b0ng s\u1ef1 m\u1ea5t c\u00e2n b\u1eb1ng nghi\u00eam tr\u1ecdng s\u1ebd l\u00e0m thay \u0111\u1ed5i d\u00f2ng \u0111i\u1ec7n v\u00e0 \u0111i\u1ec1u ch\u1ec9nh \u0111i\u1ec7n \u00e1p. C\u00e1c nghi\u00ean c\u1ee9u v\u1ec1 t\u1ea3i n\u00ean ki\u1ec3m tra d\u00f2ng \u0111i\u1ec7n c\u1ee7a t\u1eebng cu\u1ed9n d\u00e2y ri\u00eang l\u1ebb thay v\u00ec ch\u1ec9 xem x\u00e9t d\u00f2ng \u0111i\u1ec7n \u0111\u01b0\u1eddng d\u00e2y trung b\u00ecnh.<\/p>\n<h2>Tam gi\u00e1c k\u00edn v\u00e0 Tam gi\u00e1c h\u1edf<\/h2><figure class=\"wp-block-table is-style-stripes\"><table><thead><tr><th scope=\"col\">Y\u1ebfu t\u1ed1<\/th><th scope=\"col\">Delta kh\u00e9p k\u00edn<\/th><th scope=\"col\">Tam gi\u00e1c h\u1edf<\/th><th scope=\"col\">Hi\u1ec7u \u1ee9ng k\u1ef9 thu\u1eadt<\/th><\/tr><\/thead><tbody><tr><td>Transformers<\/td><td>Ba<\/td><td>Hai<\/td><td>N\u1ea1p ti\u1ec1n ng\u00e2n h\u00e0ng kh\u00e1c<\/td><\/tr><tr><td>C\u01a1 s\u1edf n\u0103ng l\u1ef1c<\/td><td>X\u1ebfp h\u1ea1ng ng\u00e2n h\u00e0ng ban \u0111\u1ea7u 100%<\/td><td>Kho\u1ea3ng 57,71 TP3T so v\u1edbi b\u1ea3n g\u1ed1c<\/td><td>Ph\u1ea3i gi\u1ea3m t\u1ea3i<\/td><\/tr><tr><td>Trung l\u1eadp<\/td><td>Kh\u00f4ng c\u00f3 s\u1eb5n<\/td><td>Kh\u00f4ng c\u00f3 s\u1eb5n<\/td><td>Vi\u1ec7c n\u1ed1i \u0111\u1ea5t c\u1ea7n c\u00f3 thi\u1ebft k\u1ebf ri\u00eang<\/td><\/tr><tr><td>\u0110\u1ed9 d\u1ecbch pha<\/td><td>Ph\u1ee5 thu\u1ed9c v\u00e0o k\u1ebft n\u1ed1i, th\u01b0\u1eddng l\u00e0 0\u00b0<\/td><td>Duy tr\u00ec m\u1ed1i quan h\u1ec7 \u0111\u01b0\u1eddng th\u1eb3ng khi ch\u00ednh x\u00e1c<\/td><td>X\u00e1c minh \u0111\u1ed9 ph\u00e2n c\u1ef1c v\u00e0 tr\u00ecnh t\u1ef1<\/td><\/tr><tr><td>S\u1eed d\u1ee5ng<\/td><td>D\u1ecbch v\u1ee5 ba pha th\u00f4ng th\u01b0\u1eddng<\/td><td>Cu\u1ed9c g\u1ecdi kh\u1ea9n c\u1ea5p ho\u1eb7c d\u1ecbch v\u1ee5 b\u1ecb h\u1ea1n ch\u1ebf<\/td><td>Ki\u1ec3m tra \u0111\u1ed9ng c\u01a1 v\u00e0 t\u00ecnh tr\u1ea1ng m\u1ea5t c\u00e2n b\u1eb1ng<\/td><\/tr><\/tbody><\/table><\/figure>\n<h2>V\u1eadn h\u00e0nh h\u00ecnh ch\u1eef V<\/h2>\n<p>N\u1ebfu m\u1ed9t t\u1ed5 m\u00e1y trong c\u1ee5m ba m\u00e1y bi\u1ebfn \u00e1p b\u1ecb ng\u1eaft kh\u1ecfi h\u1ec7 th\u1ed1ng, hai t\u1ed5 m\u00e1y c\u00f2n l\u1ea1i c\u00f3 th\u1ec3 ho\u1ea1t \u0111\u1ed9ng theo s\u01a1 \u0111\u1ed3 tam gi\u00e1c h\u1edf (open delta) n\u1ebfu thi\u1ebft b\u1ecb v\u00e0 h\u1ec7 th\u1ed1ng b\u1ea3o v\u1ec7 cho ph\u00e9p. C\u00f4ng su\u1ea5t c\u1ee7a c\u1ee5m l\u00fac n\u00e0y s\u1ebd l\u00e0 kho\u1ea3ng 57,7% so v\u1edbi c\u00f4ng su\u1ea5t kVA ban \u0111\u1ea7u khi ho\u1ea1t \u0111\u1ed9ng theo s\u01a1 \u0111\u1ed3 tam gi\u00e1c k\u00edn (closed-delta) \u2014 ch\u1ee9 kh\u00f4ng ph\u1ea3i hai ph\u1ea7n ba \u2014 v\u00e0 m\u1ed7i t\u1ed5 m\u00e1y s\u1ebd ph\u1ea3i ch\u1ecbu t\u1ea3i n\u1eb7ng h\u01a1n \u0111\u1ed1i v\u1edbi m\u1ed9t m\u1ee9c t\u1ea3i nh\u1ea5t \u0111\u1ecbnh c\u1ee7a c\u1ee5m.<\/p>\n<p>M\u1ea1ch tam gi\u00e1c h\u1edf c\u00f3 th\u1ec3 c\u1ea5p ngu\u1ed3n cho t\u1ea3i nh\u1ecf trong tr\u01b0\u1eddng h\u1ee3p kh\u1ea9n c\u1ea5p ho\u1eb7c c\u00f3 k\u1ebf ho\u1ea1ch, nh\u01b0ng c\u1ea7n ph\u1ea3i xem x\u00e9t s\u1ef1 m\u1ea5t c\u00e2n b\u1eb1ng \u0111i\u1ec7n \u00e1p, s\u00f3ng h\u00e0i, hi\u1ec7u su\u1ea5t \u0111\u1ed9ng c\u01a1 v\u00e0 c\u00e1c thi\u1ebft b\u1ecb b\u1ea3o v\u1ec7 tr\u01b0\u1edbc khi v\u1eadn h\u00e0nh.<\/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>Ki\u1ec3m tra c\u1ef1c t\u00ednh, th\u1ee9 t\u1ef1 pha v\u00e0 gi\u1ea3n \u0111\u1ed3 vect\u01a1.<\/li><li>\u0110\u1ecbnh ngh\u0129a ph\u01b0\u01a1ng ph\u00e1p n\u1ed1i \u0111\u1ea5t v\u00e0 ph\u00e1t hi\u1ec7n l\u1ed7i ch\u1ea1m \u0111\u1ea5t.<\/li><li>T\u00ednh d\u00f2ng \u0111i\u1ec7n d\u00e2y qu\u1ea5n d\u01b0\u1edbi t\u1ea3i kh\u00f4ng \u0111\u1ed1i x\u1ee9ng.<\/li><li>\u00c1p d\u1ee5ng gi\u1edbi h\u1ea1n c\u00f4ng su\u1ea5t ng\u00e2n h\u00e0ng 57.7% \u0111\u1ed1i v\u1edbi delta m\u1edf.<\/li><li>Ph\u1ed1i h\u1ee3p c\u1ea7u ch\u00ec ho\u1eb7c r\u01a1-le cho c\u00e1c \u0111i\u1ec1u ki\u1ec7n m\u1ea1ch v\u00f2ng k\u00edn v\u00e0 m\u1ea1ch v\u00f2ng h\u1edf.<\/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\/th\u1ee9 c\u1ea5p, kVA, t\u1ea7n s\u1ed1 v\u00e0 c\u00e1c \u0111\u1ea7u ph\u00e2n \u00e1p.<\/li><li>M\u1ed1i quan h\u1ec7 vect\u01a1 tam gi\u00e1c h\u1edf v\u00e0 k\u00fd hi\u1ec7u \u0111\u1ea7u c\u1ef1c.<\/li><li>Ph\u01b0\u01a1ng ph\u00e1p n\u1ed1i \u0111\u1ea5t v\u00e0 b\u1ea3o v\u1ec7 ch\u1ea1m \u0111\u1ea5t.<\/li><li>C\u00e2n b\u1eb1ng t\u1ea3i, \u0111\u1ed9ng c\u01a1, s\u00f3ng h\u00e0i v\u00e0 ch\u1ebf \u0111\u1ed9 l\u00e0m vi\u1ec7c tam gi\u00e1c h\u1edf kh\u1ea9n c\u1ea5p.<\/li><li>Y\u00eau c\u1ea7u v\u1ec1 ph\u1ed1i h\u1ee3p tr\u1edf kh\u00e1ng, th\u1eed nghi\u1ec7m v\u00e0 v\u1eadn h\u00e0nh song song.<\/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 \u0111\u00e1nh gi\u00e1 theo t\u1eebng giai \u0111o\u1ea1n thay v\u00ec ph\u00ea duy\u1ec7t k\u1ebft qu\u1ea3 kh\u1edbp danh m\u1ee5c \u0111\u1ea7u ti\u00ean. B\u1eaft \u0111\u1ea7u b\u1eb1ng t\u1ef7 s\u1ed1 \u0111i\u1ec7n \u00e1p v\u00e0 m\u1ed1i quan h\u1ec7 pha, sau \u0111\u00f3 \u0111\u1ed1i chi\u1ebfu trung t\u00ednh, n\u1ed1i \u0111\u1ea5t v\u00e0 s\u1ef1 c\u1ed1 ch\u1ea1m \u0111\u1ea5t v\u1edbi s\u00f3ng h\u00e0i v\u00e0 t\u1ea3i kh\u00f4ng c\u00e2n b\u1eb1ng. Ho\u00e0n t\u1ea5t vi\u1ec7c \u0111\u00e1nh gi\u00e1 b\u1eb1ng v\u1eadn h\u00e0nh tam gi\u00e1c h\u1edf. \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 ng\u0103n ch\u1eb7n 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 \u0111\u01b0\u1ee3c 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 tr\u00ean Google t\u1ea1i M\u1ef9 hi\u1ec7n t\u1ea1i li\u00ean t\u1ee5c \u0111\u1ec1 c\u1eadp \u0111\u1ebfn c\u00e1c ch\u1ee7 \u0111\u1ec1 bao g\u1ed3m K\u1ebft n\u1ed1i Tam gi\u00e1c (\u0394), Ph\u00e2n lo\u1ea1i, K\u1ebft n\u1ed1i Sao (Y), T\u00f4i c\u00f3 hai m\u00e1y bi\u1ebfn \u00e1p \u0111\u1ea5u tam gi\u00e1c-sao \u0111\u01b0\u1ee3c l\u1eafp \u0111\u1eb7t trong h\u1ec7 th\u1ed1ng ch\u00ednh-li\u00ean th\u00f4ng-ch\u00ednh. M\u1ed9t c\u00e1i b\u1ecb h\u1ecfng, t\u00f4i c\u00f3 th\u1ec3 thay th\u1ebf c\u00e1i b\u1ecb h\u1ecfng b\u1eb1ng m\u00e1y bi\u1ebfn \u00e1p sao-sao kh\u00f4ng?, 32 b\u00ecnh lu\u1eadn. B\u00e0i vi\u1ebft gi\u1ea3i quy\u1ebft c\u00e1c nhu c\u1ea7u c\u1ee7a ng\u01b0\u1eddi d\u00f9ng \u0111\u00f3 theo tr\u00ecnh t\u1ef1 k\u1ef9 thu\u1eadt v\u00e0 mua s\u1eafm nguy\u00ean b\u1ea3n; vi\u1ec7c \u0111i\u1ec1u h\u01b0\u1edbng th\u01b0\u01a1ng hi\u1ec7u \u0111\u1ed1i th\u1ee7 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\/delta-y-transformer-connection-wiring-and-diagram-guide\/\">h\u01b0\u1edbng d\u1eabn k\u1ebft n\u1ed1i tam gi\u00e1c - sao<\/a> <a href=\"https:\/\/lbajiele.com\/vi\/blog\/complete-guide-to-transformer-voltage-connections-vector-groups\/\">H\u01b0\u1edbng d\u1eabn v\u1ec1 nh\u00f3m \u0111\u1ea5u d\u00e2y m\u00e1y bi\u1ebfn \u00e1p<\/a> <a href=\"https:\/\/lbajiele.com\/vi\/danh-muc-san-pham\/transformer\/\">s\u1ea3n ph\u1ea9m m\u00e1y bi\u1ebfn \u00e1p<\/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\">IEC 60076-1<\/a> \u2014 C\u00e1c k\u00fd hi\u1ec7u \u0111\u1ea5u n\u1ed1i m\u00e1y bi\u1ebfn \u00e1p.<\/li><li><a href=\"https:\/\/standards.ieee.org\/\" rel=\"noopener noreferrer nofollow\" target=\"_blank\">Hi\u1ec7p h\u1ed9i Ti\u00eau chu\u1ea9n IEEE<\/a> \u2014 Ti\u00eau chu\u1ea9n \u0111\u1ea5u n\u1ed1i v\u00e0 th\u1eed nghi\u1ec7m m\u00e1y bi\u1ebfn \u00e1p.<\/li><li><a href=\"https:\/\/www.nfpa.org\/codes-and-standards\" rel=\"noopener noreferrer nofollow\" target=\"_blank\">Quy chu\u1ea9n v\u00e0 Ti\u00eau chu\u1ea9n NFPA<\/a> \u2014 C\u00e1c y\u00eau c\u1ea7u v\u1ec1 n\u1ed1i \u0111\u1ea5t v\u00e0 l\u1eafp \u0111\u1eb7t.<\/li><\/ul><\/section>\n<h2>K\u1ebft lu\u1eadn<\/h2><p>Delta-delta c\u00f3 hi\u1ec7u qu\u1ea3 \u1edf n\u01a1i kh\u00f4ng c\u1ea7n d\u00e2y trung t\u00ednh v\u00e0 vi\u1ec7c n\u1ed1i \u0111\u1ea5t \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf c\u00f3 ch\u1ee7 \u0111\u00edch. C\u1ea7n x\u00e1c nh\u1eadn quan h\u1ec7 pha, t\u1ea3i c\u1ee7a t\u1eebng cu\u1ed9n d\u00e2y v\u00e0 thi\u1ebft b\u1ecb b\u1ea3o v\u1ec7; coi delta h\u1edf l\u00e0 m\u1ed9t ch\u1ebf \u0111\u1ed9 v\u1eadn h\u00e0nh gi\u1ea3m c\u00f4ng su\u1ea5t, kh\u00f4ng ph\u1ea3i l\u00e0 m\u1ed9t m\u00e1y bi\u1ebfn \u00e1p d\u1ef1 ph\u00f2ng mi\u1ec5n ph\u00ed.<\/p>","protected":false},"excerpt":{"rendered":"<p>M\u1ed9t m\u00e1y bi\u1ebfn \u00e1p \u0111\u1ea5u tam gi\u00e1c-tam gi\u00e1c c\u00f3 c\u1ea3 cu\u1ed9n d\u00e2y s\u01a1 c\u1ea5p v\u00e0 th\u1ee9 c\u1ea5p \u0111\u01b0\u1ee3c \u0111\u1ea5u theo h\u00ecnh tam gi\u00e1c k\u00edn, do \u0111\u00f3 \u0111i\u1ec7n \u00e1p \u0111\u01b0\u1eddng d\u00e2y b\u1eb1ng \u0111i\u1ec7n \u00e1p pha c\u1ee7a cu\u1ed9n d\u00e2y \u1edf m\u1ed7i ph\u00eda v\u00e0 kh\u00f4ng c\u00f3 \u0111i\u1ec3m trung t\u00ednh v\u1ed1n c\u00f3; n\u00f3 c\u0169ng c\u00f3 \u0111\u1ed9 l\u1ec7ch pha b\u1eb1ng kh\u00f4ng\u2026<\/p>","protected":false},"author":6,"featured_media":2884,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[52],"tags":[60,59],"class_list":["post-2885","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-transformers","tag-power-transformer","tag-transformer-fundamentals"],"blocksy_meta":[],"acf":[],"_links":{"self":[{"href":"https:\/\/lbajiele.com\/vi\/wp-json\/wp\/v2\/posts\/2885","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=2885"}],"version-history":[{"count":1,"href":"https:\/\/lbajiele.com\/vi\/wp-json\/wp\/v2\/posts\/2885\/revisions"}],"predecessor-version":[{"id":3020,"href":"https:\/\/lbajiele.com\/vi\/wp-json\/wp\/v2\/posts\/2885\/revisions\/3020"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/lbajiele.com\/vi\/wp-json\/wp\/v2\/media\/2884"}],"wp:attachment":[{"href":"https:\/\/lbajiele.com\/vi\/wp-json\/wp\/v2\/media?parent=2885"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/lbajiele.com\/vi\/wp-json\/wp\/v2\/categories?post=2885"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/lbajiele.com\/vi\/wp-json\/wp\/v2\/tags?post=2885"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}