{"id":3794,"date":"2026-09-27T14:39:02","date_gmt":"2026-09-27T14:39:02","guid":{"rendered":"https:\/\/lbajiele.com\/blog\/calculator-for-power-factor-calculator-and-formula-guide\/"},"modified":"2026-09-27T14:41:27","modified_gmt":"2026-09-27T14:41:27","slug":"calculator-for-power-factor-calculator-and-formula-guide","status":"publish","type":"post","link":"https:\/\/lbajiele.com\/vi\/blog\/calculator-for-power-factor-calculator-and-formula-guide\/","title":{"rendered":"M\u00e1y t\u00ednh cho h\u1ec7 s\u1ed1 c\u00f4ng su\u1ea5t: H\u01b0\u1edbng d\u1eabn v\u1ec1 m\u00e1y t\u00ednh v\u00e0 c\u00f4ng th\u1ee9c"},"content":{"rendered":"<p>A <strong>M\u00e1y t\u00ednh c\u00f4ng su\u1ea5t<\/strong> cung c\u1ea5p c\u00f4ng su\u1ea5t ph\u1ea3n kh\u00e1ng g\u1ea7n t\u1ea3i c\u1ea3m kh\u00e1ng, l\u00e0m gi\u1ea3m d\u00f2ng \u0111i\u1ec7n ph\u1ea3n kh\u00e1ng l\u1ea5y t\u1eeb l\u01b0\u1edbi \u0111i\u1ec7n. N\u1ebfu \u0111\u01b0\u1ee3c \u00e1p d\u1ee5ng \u0111\u00fang c\u00e1ch, m\u1ed9t b\u1ed9 t\u1ee5 b\u00f9 c\u00f3 th\u1ec3 l\u00e0m gi\u1ea3m d\u00f2ng \u0111i\u1ec7n, gi\u1ea3i ph\u00f3ng c\u00f4ng su\u1ea5t c\u1ee7a m\u00e1y bi\u1ebfn \u00e1p v\u00e0 c\u00e1p, gi\u1ea3m t\u1ed5n th\u1ea5t v\u00e0 gi\u00fap tr\u00e1nh c\u00e1c kho\u1ea3n ph\u1ea1t t\u1eeb c\u00f4ng ty \u0111i\u1ec7n l\u1ef1c. Thi\u1ebft k\u1ebf ph\u1ea3i ph\u00f9 h\u1ee3p v\u1edbi bi\u1ec3u \u0111\u1ed3 ph\u1ee5 t\u1ea3i th\u1ef1c t\u1ebf v\u00e0 m\u00f4i tr\u01b0\u1eddng s\u00f3ng h\u00e0i; vi\u1ec7c ch\u1ec9 l\u1eafp \u0111\u1eb7t b\u1ed9 t\u1ee5 l\u1edbn nh\u1ea5t c\u00f3 th\u1ec3 g\u00e2y ra hi\u1ec7n t\u01b0\u1ee3ng b\u00f9 qu\u00e1 m\u1ee9c, c\u1ed9ng h\u01b0\u1edfng ho\u1eb7c h\u01b0 h\u1ecfng thi\u1ebft b\u1ecb.<\/p>\n<h2>Vi\u1ec7c hi\u1ec7u ch\u1ec9nh h\u1ec7 s\u1ed1 c\u00f4ng su\u1ea5t thay \u0111\u1ed5i nh\u1eefng g\u00ec<\/h2>\n<p>H\u1ec7 s\u1ed1 c\u00f4ng su\u1ea5t l\u00e0 t\u1ef7 s\u1ed1 gi\u1eefa c\u00f4ng su\u1ea5t t\u00e1c d\u1ee5ng t\u00ednh b\u1eb1ng kil\u00f4o\u00e1t v\u00e0 c\u00f4ng su\u1ea5t bi\u1ec3u ki\u1ebfn t\u00ednh b\u1eb1ng kil\u00f4v\u00f4n-ampe: <strong>PF = kW \u00f7 kVA<\/strong>. \u0110\u1ed9ng c\u01a1, m\u00e1y bi\u1ebfn \u00e1p, m\u00e1y h\u00e0n v\u00e0 thi\u1ebft b\u1ecb chi\u1ebfu s\u00e1ng ph\u00f3ng \u0111i\u1ec7n ti\u00eau th\u1ee5 c\u00f4ng su\u1ea5t ph\u1ea3n kh\u00e1ng c\u1ea3m kh\u00e1ng. T\u1ee5 \u0111i\u1ec7n s\u1ea3n sinh c\u00f4ng su\u1ea5t ph\u1ea3n kh\u00e1ng theo h\u01b0\u1edbng ng\u01b0\u1ee3c l\u1ea1i, do \u0111\u00f3 h\u1ec7 th\u1ed1ng ph\u00eda ngu\u1ed3n mang \u00edt d\u00f2ng \u0111i\u1ec7n kh\u00f4ng c\u1ea7n thi\u1ebft h\u01a1n trong khi c\u00f4ng su\u1ea5t h\u1eefu \u00edch kW v\u1eabn h\u1ea7u nh\u01b0 kh\u00f4ng \u0111\u1ed5i.<\/p>\n<p>\u01afu \u0111i\u1ec3m ch\u00ednh c\u1ee7a vi\u1ec7c hi\u1ec7u ch\u1ec9nh h\u1ec7 s\u1ed1 c\u00f4ng su\u1ea5t l\u00e0 d\u00f2ng \u0111i\u1ec7n tr\u00ean \u0111\u01b0\u1eddng d\u00e2y th\u1ea5p h\u01a1n, gi\u1ea3m s\u1ee5t \u00e1p v\u00e0 t\u1ed5n th\u1ea5t I\u00b2R, t\u0103ng c\u00f4ng su\u1ea5t kh\u1ea3 d\u1ee5ng trong m\u00e1y bi\u1ebfn \u00e1p v\u00e0 thi\u1ebft b\u1ecb \u0111\u00f3ng c\u1eaft, \u0111\u1ed3ng th\u1eddi c\u00f3 th\u1ec3 gi\u1ea3m ph\u00ed nhu c\u1ea7u \u0111i\u1ec7n n\u0103ng. N\u00f3 kh\u00f4ng l\u00e0m gi\u1ea3m tr\u1ef1c ti\u1ebfp n\u0103ng l\u01b0\u1ee3ng ti\u00eau th\u1ee5 b\u1edfi t\u1ea3i c\u01a1 h\u1ecdc, v\u00e0 n\u00f3 kh\u00f4ng th\u1ec3 kh\u1eafc ph\u1ee5c hi\u1ec7u su\u1ea5t k\u00e9m ho\u1eb7c s\u1ef1 m\u1ea5t c\u00e2n b\u1eb1ng t\u1ea3i.<\/p>\n<h2>C\u00e1ch t\u00ednh ch\u1ecdn dung l\u01b0\u1ee3ng t\u1ee5 b\u00f9<\/h2>\n<p>\u0110\u1ed1i v\u1edbi t\u1ea3i th\u1ef1c \u0111\u00e3 bi\u1ebft, vi\u1ec7c hi\u1ec7u ch\u1ec9nh c\u1ea7n thi\u1ebft th\u01b0\u1eddng \u0111\u01b0\u1ee3c \u01b0\u1edbc t\u00ednh b\u1eb1ng <strong>Qc = P \u00d7 (tan \u03c61 \u2212 tan \u03c62)<\/strong>, trong \u0111\u00f3 P l\u00e0 t\u1ea3i t\u00ednh b\u1eb1ng kW, \u03c61 l\u00e0 g\u00f3c \u1edf h\u1ec7 s\u1ed1 c\u00f4ng su\u1ea5t hi\u1ec7n t\u1ea1i, v\u00e0 \u03c62 l\u00e0 g\u00f3c \u1edf h\u1ec7 s\u1ed1 c\u00f4ng su\u1ea5t m\u1ee5c ti\u00eau. V\u00ed d\u1ee5, vi\u1ec7c c\u1ea3i thi\u1ec7n h\u1ec7 s\u1ed1 c\u00f4ng su\u1ea5t cho t\u1ea3i 500 kW t\u1eeb 0,75 l\u00ean 0,95 \u0111\u00f2i h\u1ecfi kho\u1ea3ng 277 kVAr. K\u00edch th\u01b0\u1edbc cu\u1ed1i c\u00f9ng n\u00ean s\u1eed d\u1ee5ng c\u00e1c kho\u1ea3ng th\u1eddi gian nhu c\u1ea7u \u0111\u01b0\u1ee3c \u0111o \u0111\u1ea1c thay v\u00ec ch\u1ec9 d\u1ef1a v\u00e0o nh\u00e3n th\u00f4ng s\u1ed1 c\u1ee7a thi\u1ebft b\u1ecb.<\/p>\n<p>M\u1ed9t m\u1ee5c ti\u00eau nh\u01b0 t\u1eeb 0,95 \u0111\u1ebfn 0,98 th\u01b0\u1eddng an to\u00e0n h\u01a1n l\u00e0 c\u1ed1 g\u1eafng duy tr\u00ec h\u1ec7 s\u1ed1 c\u00f4ng su\u1ea5t b\u1eb1ng 1 trong m\u1ecdi \u0111i\u1ec1u ki\u1ec7n v\u1eadn h\u00e0nh. N\u1ebfu t\u1ea3i thay \u0111\u1ed5i, h\u00e3y chia t\u1ed5ng s\u1ed1 kVAr th\u00e0nh c\u00e1c c\u1ea5p. C\u1ea5p nh\u1ecf nh\u1ea5t quy\u1ebft \u0111\u1ecbnh \u0111\u1ed9 ph\u00e2n gi\u1ea3i c\u1ee7a b\u1ed9 \u0111i\u1ec1u khi\u1ec3n, trong\u0e02\u0e13\u0e30\u0e17\u0e35\u0e48 m\u1ed9t tr\u00ecnh t\u1ef1 c\u1ea5p h\u1ee3p l\u00fd s\u1ebd ng\u0103n ch\u1eb7n vi\u1ec7c \u0111\u00f3ng c\u1eaft li\u00ean t\u1ee5c quanh gi\u00e1 tr\u1ecb m\u1ee5c ti\u00eau.<\/p>\n<figure class=\"wp-block-image\"><img decoding=\"async\" alt=\"Automatic capacitor bank stages with contactors fuses reactors and power factor controller\" src=\"https:\/\/lbajiele.com\/wp-content\/uploads\/2026\/09\/26-01.jpg\"\/><figcaption>C\u00e1c c\u1ea5p t\u1ef1 \u0111\u1ed9ng b\u00e1m theo t\u1ea3i c\u00f4ng nghi\u1ec7p \u0111ang thay \u0111\u1ed5i m\u00e0 kh\u00f4ng g\u00e2y ra h\u1ec7 s\u1ed1 c\u00f4ng su\u1ea5t d\u1eabn (s\u1edbm pha) trong c\u00e1c th\u1eddi k\u1ef3 t\u1ea3i nh\u1eb9.<\/figcaption><\/figure>\n<section class=\"lbaji-article-table\"><h2>B\u1ea3ng so s\u00e1nh v\u00e0 l\u1ef1a ch\u1ecdn nhanh<\/h2><p>S\u1eed d\u1ee5ng b\u1ea3ng n\u00e0y nh\u01b0 m\u1ed9t ph\u1ea7n t\u00f3m t\u1eaft nhanh v\u1ec1 c\u00e1c quy\u1ebft \u0111\u1ecbnh k\u1ef9 thu\u1eadt v\u00e0 mua s\u1eafm ch\u00ednh \u0111\u01b0\u1ee3c gi\u1ea3i th\u00edch trong b\u00e0i vi\u1ebft.<\/p><figure class=\"wp-block-table is-style-stripes\"><table><thead><tr><th scope=\"col\">Khu v\u1ef1c quy\u1ebft \u0111\u1ecbnh<\/th><th scope=\"col\">\u00dd ngh\u0129a th\u1ef1c ti\u1ec5n<\/th><th scope=\"col\">C\u1ea7n x\u00e1c minh nh\u1eefng g\u00ec<\/th><\/tr><\/thead><tbody><tr><td>Vi\u1ec7c hi\u1ec7u ch\u1ec9nh h\u1ec7 s\u1ed1 c\u00f4ng su\u1ea5t thay \u0111\u1ed5i nh\u1eefng g\u00ec<\/td><td>H\u1ec7 s\u1ed1 c\u00f4ng su\u1ea5t l\u00e0 t\u1ef7 s\u1ed1 gi\u1eefa c\u00f4ng su\u1ea5t th\u1ef1c t\u00ednh b\u1eb1ng kil\u00f4watt v\u00e0 c\u00f4ng su\u1ea5t bi\u1ec3u ki\u1ebfn t\u00ednh b\u1eb1ng kil\u00f4volt-ampe: PF = kW \u00f7 kVA. .<\/td><td>\u0110\u1ed9ng c\u01a1, m\u00e1y bi\u1ebfn \u00e1p, m\u00e1y h\u00e0n v\u00e0 \u0111\u00e8n ph\u00f3ng \u0111i\u1ec7n ti\u00eau th\u1ee5 c\u00f4ng su\u1ea5t ph\u1ea3n kh\u00e1ng c\u1ea3m \u1ee9ng.<\/td><\/tr><tr><td>C\u00e1ch t\u00ednh ch\u1ecdn dung l\u01b0\u1ee3ng t\u1ee5 b\u00f9<\/td><td>\u0110\u1ed1i v\u1edbi m\u1ed9t t\u1ea3i th\u1ef1c \u0111\u00e3 bi\u1ebft, c\u00f4ng su\u1ea5t b\u00f9 c\u1ea7n thi\u1ebft th\u01b0\u1eddng \u0111\u01b0\u1ee3c \u01b0\u1edbc t\u00ednh b\u1eb1ng c\u00f4ng th\u1ee9c $Q_c = P \\times (\\tan \\varphi_1 - tan \\varphi_2)$, trong \u0111\u00f3 P l\u00e0 c\u00f4ng su\u1ea5t c\u1ee7a t\u1ea3i t\u00ednh b\u1eb1ng kW, $\\varphi_1$ l\u00e0 g\u00f3c \u1ee9ng v\u1edbi h\u1ec7 s\u1ed1 c\u00f4ng su\u1ea5t hi\u1ec7n t\u1ea1i, v\u00e0 $\\varphi_2$ l\u00e0 g\u00f3c \u1ee9ng v\u1edbi h\u1ec7 s\u1ed1 c\u00f4ng su\u1ea5t m\u1ee5c ti\u00eau.<\/td><td>V\u00ed d\u1ee5, hi\u1ec7u ch\u1ec9nh 500 kW t\u1eeb h\u1ec7 s\u1ed1 c\u00f4ng su\u1ea5t 0,75 l\u00ean 0,95 \u0111\u00f2i h\u1ecfi kho\u1ea3ng 277 kVAr.<\/td><\/tr><tr><td>C\u00e1c ph\u01b0\u01a1ng ph\u00e1p hi\u1ec7u ch\u1ec9nh c\u1ed1 \u0111\u1ecbnh, t\u1ef1 \u0111\u1ed9ng v\u00e0 nhanh ch\u00f3ng<\/td><td>T\u1ee5 \u0111i\u1ec7n t\u0129nh ph\u00f9 h\u1ee3p cho m\u1ed9t t\u1ea3i ri\u00eang l\u1ebb \u1ed5n \u0111\u1ecbnh, ch\u1eb3ng h\u1ea1n nh\u01b0 m\u1ed9t \u0111\u1ed9ng c\u01a1 ho\u1ea1t \u0111\u1ed9ng li\u00ean t\u1ee5c.<\/td><td>N\u00f3 c\u1ea7n \u0111\u01b0\u1ee3c chuy\u1ec3n m\u1ea1ch c\u00f9ng v\u1edbi t\u1ea3i v\u00e0 ki\u1ec3m tra \u0111\u1ed1i chi\u1ebfu v\u1edbi gi\u1edbi h\u1ea1n t\u1ef1 k\u00edch th\u00edch.<\/td><\/tr><tr><td>S\u00f3ng h\u00e0i v\u00e0 cu\u1ed9n kh\u00e1ng l\u1ecdc s\u00f3ng h\u00e0i<\/td><td>T\u1ee5 \u0111i\u1ec7n v\u00e0 \u0111i\u1ec7n c\u1ea3m c\u1ee7a h\u1ec7 th\u1ed1ng th\u01b0\u1ee3ng ngu\u1ed3n c\u00f3 th\u1ec3 t\u1ea1o th\u00e0nh m\u1ed9t m\u1ea1ch dao \u0111\u1ed9ng c\u1ed9ng h\u01b0\u1edfng.<\/td><td>Bi\u1ebfn t\u1ea7n, h\u1ec7 th\u1ed1ng UPS, b\u1ed9 ch\u1ec9nh l\u01b0u v\u00e0 c\u00e1c t\u1ea3i phi tuy\u1ebfn t\u00ednh t\u01b0\u01a1ng t\u1ef1 c\u00f3 th\u1ec3 t\u1ea1o ra c\u00e1c s\u00f3ng h\u00e0i b\u1ecb khu\u1ebfch \u0111\u1ea1i t\u1ea1i t\u1ea7n s\u1ed1 c\u1ed9ng h\u01b0\u1edfng.<\/td><\/tr><tr><td>B\u1ea3o v\u1ec7, \u0111\u00f3ng c\u1eaft v\u00e0 l\u1eafp \u0111\u1eb7t<\/td><td>D\u00f2ng \u0111i\u1ec7n c\u1ee7a t\u1ee5 \u0111i\u1ec7n c\u00f3 th\u1ec3 v\u01b0\u1ee3t qu\u00e1 gi\u00e1 tr\u1ecb danh \u0111\u1ecbnh c\u1ee7a n\u00f3 do dung sai \u0111i\u1ec7n \u00e1p v\u00e0 c\u00e1c s\u00f3ng h\u00e0i.<\/td><td>Ch\u1ecdn c\u00e1p, thanh c\u00e1i, m\u00e1y c\u1eaft, c\u1ea7u ch\u00ec, c\u00f4ng t\u1eafc t\u01a1 v\u00e0 cu\u1ed9n kh\u00e1ng cho c\u00e1c ch\u1ebf \u0111\u1ed9 l\u00e0m vi\u1ec7c li\u00ean t\u1ee5c v\u00e0 d\u00f2ng kh\u1edfi \u0111\u1ed9ng do nh\u00e0 s\u1ea3n xu\u1ea5t quy \u0111\u1ecbnh.<\/td><\/tr><\/tbody><\/table><\/figure><\/section><h2>C\u00e1c ph\u01b0\u01a1ng ph\u00e1p hi\u1ec7u ch\u1ec9nh c\u1ed1 \u0111\u1ecbnh, t\u1ef1 \u0111\u1ed9ng v\u00e0 nhanh ch\u00f3ng<\/h2>\n<h3>T\u1ee5 \u0111i\u1ec7n c\u1ed1 \u0111\u1ecbnh<\/h3>\n<p>T\u1ee5 \u0111i\u1ec7n c\u1ed1 \u0111\u1ecbnh ph\u00f9 h\u1ee3p v\u1edbi m\u1ed9t t\u1ea3i \u0111\u01a1n l\u1ebb \u1ed5n \u0111\u1ecbnh, ch\u1eb3ng h\u1ea1n nh\u01b0 m\u1ed9t \u0111\u1ed9ng c\u01a1 ho\u1ea1t \u0111\u1ed9ng li\u00ean t\u1ee5c. N\u00f3 n\u00ean \u0111\u01b0\u1ee3c \u0111\u00f3ng c\u1eaft c\u00f9ng v\u1edbi t\u1ea3i v\u00e0 \u0111\u01b0\u1ee3c ki\u1ec3m tra \u0111\u1ed1i v\u1edbi c\u00e1c gi\u1edbi h\u1ea1n t\u1ef1 k\u00edch th\u00edch. Vi\u1ec7c b\u00f9 c\u1ed1 \u0111\u1ecbnh tr\u00ean m\u1ed9t m\u00e1y bi\u1ebfn \u00e1p ho\u1eb7c \u0111\u1ed9ng c\u01a1 \u0111ang non t\u1ea3i c\u00f3 th\u1ec3 t\u1ea1o ra h\u1ec7 s\u1ed1 c\u00f4ng su\u1ea5t c\u1ea3m \u1ee9ng v\u01b0\u1ee3t tr\u01b0\u1edbc.<\/p>\n<h3>T\u1ee5 b\u00f9 t\u1ef1 \u0111\u1ed9ng<\/h3>\n<p>M\u1ed9t m\u00e1y t\u00ednh t\u1ef1 \u0111\u1ed9ng cho h\u1ec7 th\u1ed1ng \u0111i\u1ec1u khi\u1ec3n c\u00f4ng su\u1ea5t s\u1eed d\u1ee5ng b\u1ed9 \u0111i\u1ec1u khi\u1ec3n \u0111\u1ec3 th\u00eam ho\u1eb7c lo\u1ea1i b\u1ecf c\u00e1c pha \u0111\u01b0\u1ee3c \u0111i\u1ec1u khi\u1ec3n b\u1edfi b\u1ed9 c\u00f4ng t\u1eafc. \u0110\u00e2y l\u00e0 l\u1ef1a ch\u1ecdn th\u00f4ng th\u01b0\u1eddng cho b\u1ea3ng ph\u00e2n ph\u1ed1i \u0111i\u1ec7n \u00e1p th\u1ea5p ch\u00ednh ph\u1ee5c v\u1ee5 nhi\u1ec1u t\u1ea3i \u0111i\u1ec7n c\u00f3 th\u1ec3 thay \u0111\u1ed5i. H\u1ec7 th\u1ed1ng n\u00e0y c\u1ea7n \u0111\u01b0\u1ee3c ph\u1ed1i h\u1ee3p v\u1edbi c\u1ea7u dao \u0111\u1ea7u v\u00e0o v\u00e0 thi\u1ebft b\u1ecb t\u1ea1i \u0111\u1ecba \u0111i\u1ec3m. <a href=\"https:\/\/lbajiele.com\/vi\/san-pham\/ybm-12-high-and-low-voltage-preinstalled-substation\/\">tr\u1ea1m bi\u1ebfn \u00e1p l\u1eafp s\u1eb5n<\/a> dung t\u00edch.<\/p>\n<h3>C\u00e1c gi\u1ea3i ph\u00e1p chuy\u1ec3n m\u1ea1ch b\u1eb1ng thyristor v\u00e0 ch\u1ee7 \u0111\u1ed9ng<\/h3>\n<p>C\u00e1c t\u1ea3i bi\u1ebfn thi\u00ean nhanh c\u00f3 th\u1ec3 c\u1ea7n chuy\u1ec3n m\u1ea1ch b\u1eb1ng thyristor v\u00ec c\u00e1c c\u00f4ng t\u1eafc t\u01a1 th\u00f4ng th\u01b0\u1eddng kh\u00f4ng th\u1ec3 theo k\u1ecbp c\u00e1c thay \u0111\u1ed5i \u0111\u1ee7 nhanh. Vi\u1ec7c hi\u1ec7u ch\u1ec9nh h\u1ec7 s\u1ed1 c\u00f4ng su\u1ea5t ch\u1ee7 \u0111\u1ed9ng trong thi\u1ebft b\u1ecb \u0111i\u1ec7n t\u1eed v\u00e0 b\u1ed9 l\u1ecdc s\u00f3ng h\u00e0i ch\u1ee7 \u0111\u1ed9ng s\u1eed d\u1ee5ng \u0111i\u1ec7n t\u1eed c\u00f4ng su\u1ea5t; nh\u1eefng thi\u1ebft b\u1ecb n\u00e0y kh\u00e1c v\u1edbi t\u1ee5 b\u00f9 song song th\u00f4ng th\u01b0\u1eddng. Thi\u1ebft b\u1ecb hi\u1ec7u ch\u1ec9nh h\u1ec7 s\u1ed1 c\u00f4ng su\u1ea5t ph\u00f9 h\u1ee3p ph\u1ee5 thu\u1ed9c v\u00e0o th\u1eddi gian \u0111\u00e1p \u1ee9ng, ph\u1ed5 s\u00f3ng h\u00e0i, \u0111i\u1ec7n \u00e1p v\u00e0 \u0111\u1eb7c t\u00ednh c\u1ee7a t\u1ea3i.<\/p>\n<h2>S\u00f3ng h\u00e0i v\u00e0 cu\u1ed9n kh\u00e1ng l\u1ecdc s\u00f3ng h\u00e0i<\/h2>\n<p>T\u1ee5 \u0111i\u1ec7n v\u00e0 \u0111i\u1ec7n c\u1ea3m c\u1ee7a h\u1ec7 th\u1ed1ng th\u01b0\u1ee3ng ngu\u1ed3n c\u00f3 th\u1ec3 t\u1ea1o th\u00e0nh m\u1ed9t m\u1ea1ch c\u1ed9ng ho\u00e0e. C\u00e1c \u1ed5 \u0111\u0129a bi\u1ebfn t\u1ea7n, h\u1ec7 th\u1ed1ng UPS, b\u1ed9 ch\u1ec9nh l\u01b0u v\u00e0 c\u00e1c t\u1ea3i phi tuy\u1ebfn t\u00ednh t\u01b0\u01a1ng t\u1ef1 c\u00f3 th\u1ec3 b\u01a1m c\u00e1c s\u00f3ng h\u00e0i \u0111\u01b0\u1ee3c khu\u1ebfch \u0111\u1ea1i t\u1ea1i \u0111i\u1ec3m c\u1ed9ng h\u01b0\u1edfng. C\u00e1c tri\u1ec7u ch\u1ee9ng bao g\u1ed3m qu\u00e1 nhi\u1ec7t t\u1ee5 \u0111i\u1ec7n, c\u1ea7u ch\u00ec ho\u1ea1t \u0111\u1ed9ng, h\u1ecfng contactor, m\u00e9o \u0111i\u1ec7n \u00e1p v\u00e0 r\u00fat ng\u1eafn tu\u1ed5i th\u1ecd d\u1ecbch v\u1ee5.<\/p>\n<p>Do \u0111\u00f3, m\u1ed9t kh\u1ea3o s\u00e1t v\u1ec1 s\u00f3ng h\u00e0i n\u00ean \u0111\u01b0\u1ee3c th\u1ef1c hi\u1ec7n tr\u01b0\u1edbc khi thi\u1ebft k\u1ebf tr\u00ean m\u1ed9t h\u1ec7 th\u1ed1ng c\u00f4ng nghi\u1ec7p. C\u00e1c cu\u1ed9n kh\u00e1ng kh\u1eed \u0111i\u1ec1u h\u01b0\u1edfng m\u1eafc n\u1ed1i ti\u1ebfp v\u1edbi c\u00e1c c\u1ea5p t\u1ee5 \u0111i\u1ec7n s\u1ebd d\u1ecbch chuy\u1ec3n t\u1ea7n s\u1ed1 c\u1ed9ng h\u01b0\u1edfng xu\u1ed1ng d\u01b0\u1edbi m\u1ee9c s\u00f3ng h\u00e0i g\u00e2y phi\u1ec1n to\u00e1i v\u00e0 h\u1ea1n ch\u1ebf d\u00f2ng \u0111i\u1ec7n kh\u1edfi \u0111\u1ed9ng. Tr\u01b0\u1eddng h\u1ee3p m\u00e9o d\u1ea1ng nghi\u00eam tr\u1ecdng, c\u00f3 th\u1ec3 c\u1ea7n \u0111\u1ebfn m\u1ed9t b\u1ed9 t\u1ee5 l\u1ecdc ho\u1eb7c b\u1ed9 l\u1ecdc s\u00f3ng h\u00e0i ch\u1ee7 \u0111\u1ed9ng. B\u1ed9 t\u1ee5 c\u0169ng ph\u1ea3i \u0111\u01b0\u1ee3c ph\u1ed1i h\u1ee3p v\u1edbi <a href=\"https:\/\/lbajiele.com\/vi\/san-pham\/kyn28a-12-armouring-removable-ac-metal-enclosed-switchgear\/\">t\u1ee7 \u0111i\u1ec7n trung th\u1ebf<\/a> v\u00e0 c\u00e1c r\u01a1-le b\u1ea3o v\u1ec7 hi\u1ec7n h\u1eefu.<\/p>\n<figure class=\"wp-block-image\"><img decoding=\"async\" alt=\"Outdoor medium voltage capacitor bank used for power factor correction\" src=\"https:\/\/lbajiele.com\/wp-content\/uploads\/2026\/09\/26-02.jpg\"\/><figcaption>C\u00e1c b\u1ed9 t\u1ee5 trung th\u1ebf c\u1ea7n c\u00f3 c\u00e1c thi\u1ebft b\u1ecb \u0111\u00f3ng c\u1eaft chuy\u00ean d\u1ee5ng cho \u1ee9ng d\u1ee5ng, b\u1ea3o v\u1ec7 m\u1ea5t c\u00e2n b\u1eb1ng, ph\u1ed1i h\u1ee3p c\u00e1ch ly v\u00e0 c\u00e1c quy \u0111\u1ecbnh x\u1ea3 \u0111i\u1ec7n an to\u00e0n.<\/figcaption><\/figure>\n<h2>B\u1ea3o v\u1ec7, \u0111\u00f3ng c\u1eaft v\u00e0 l\u1eafp \u0111\u1eb7t<\/h2>\n<p>D\u00f2ng \u0111i\u1ec7n c\u1ee7a t\u1ee5 \u0111i\u1ec7n c\u00f3 th\u1ec3 v\u01b0\u1ee3t qu\u00e1 gi\u00e1 tr\u1ecb danh \u0111\u1ecbnh do dung sai \u0111i\u1ec7n \u00e1p v\u00e0 s\u00f3ng h\u00e0i. H\u00e3y ch\u1ecdn c\u00e1p, thanh c\u00e1i,aptomat, c\u1ea7u ch\u00ec, kh\u1edfi \u0111\u1ed9ng t\u1eeb v\u00e0 cu\u1ed9n kh\u00e1ng ph\u00f9 h\u1ee3p v\u1edbi c\u00e1c ch\u1ebf \u0111\u1ed9 l\u00e0m vi\u1ec7c li\u00ean t\u1ee5c v\u00e0 d\u00f2ng \u0111i\u1ec7n kh\u1edfi d\u00f2ng do nh\u00e0 s\u1ea3n xu\u1ea5t quy \u0111\u1ecbnh. Kh\u1edfi \u0111\u1ed9ng t\u1eeb chuy\u00ean d\u1ee5ng cho t\u1ee5 \u0111i\u1ec7n s\u1eed d\u1ee5ng \u0111i\u1ec7n tr\u1edf n\u1ea1p tr\u01b0\u1edbc ho\u1eb7c c\u00e1c b\u1ed1 tr\u00ed h\u1ea1n ch\u1ebf \u0111\u1ec3 ki\u1ec3m so\u00e1t qu\u00e1 tr\u00ecnh qu\u00e1 \u0111\u1ed9 khi \u0111\u00f3ng c\u1eaft.<\/p>\n<p>Cung c\u1ea5p \u0111i\u1ec7n tr\u1edf ph\u00f3ng \u0111i\u1ec7n, th\u00f4ng gi\u00f3 v\u1ecf t\u1ee7, n\u1ed1i \u0111\u1ea5t, nh\u00e3n c\u1ea3nh b\u00e1o v\u00e0 kho\u1ea3ng c\u00e1ch h\u1ee3p l\u00fd. Nhi\u1ec7t \u0111\u1ed9 \u0111\u1eb7c bi\u1ec7t quan tr\u1ecdng v\u00ec tu\u1ed5i th\u1ecd c\u1ee7a t\u1ee5 \u0111i\u1ec7n gi\u1ea3m nhanh ch\u00f3ng khi ch\u1ea5t \u0111i\u1ec7n m\u00f4i ho\u1ea1t \u0111\u1ed9ng \u1edf nhi\u1ec7t \u0111\u1ed9 qu\u00e1 cao. C\u00e1c b\u1ed9 t\u1ee5 \u0111i\u1ec7n trung th\u1ebf c\u0169ng c\u00f3 th\u1ec3 y\u00eau c\u1ea7u b\u1ea3o v\u1ec7 m\u1ea5t c\u00e2n b\u1eb1ng, thi\u1ebft b\u1ecb ch\u1ed1ng s\u00e9t lan truy\u1ec1n, thi\u1ebft b\u1ecb \u0111\u00f3ng c\u1eaft chuy\u00ean d\u1ee5ng v\u00e0 c\u00e1c kh\u00f3a li\u00ean \u0111\u1ed9ng t\u01b0\u01a1ng th\u00edch v\u1edbi c\u00e1c thi\u1ebft b\u1ecb nh\u01b0 <a href=\"https:\/\/lbajiele.com\/vi\/san-pham\/kyn61-40-5-armouring-removable-ac-metal-enclosed-switchgear\/\">T\u1ee7 \u0111\u00f3ng c\u1eaft b\u1ecdc kim lo\u1ea1i 40.5 kV<\/a>.<\/p>\n<h2>Danh m\u1ee5c ki\u1ec3m tra v\u1eadn h\u00e0nh v\u00e0 b\u1ea3o tr\u00ec<\/h2>\n<p>Tr\u01b0\u1edbc khi \u0111\u00f3ng \u0111i\u1ec7n, h\u00e3y ki\u1ec3m tra \u0111i\u1ec7n dung, \u0111i\u1ec7n tr\u1edf c\u00e1ch \u0111i\u1ec7n, h\u1ec7 th\u1ed1ng d\u00e2y \u0111i\u1ec7n, l\u1ef1c si\u1ebft \u1ed1c, n\u1ed1i \u0111\u1ea5t, \u0111\u1ecbnh m\u1ee9c c\u1ea7u ch\u00ec, c\u00e1c ng\u00f5 v\u00e0o c\u1ee7a b\u1ed9 \u0111i\u1ec1u khi\u1ec3n, c\u1ef1c t\u00ednh c\u1ee7a bi\u1ebfn d\u00f2ng v\u00e0 th\u1eddi gian x\u1ea3. \u0110\u00f3ng \u0111i\u1ec7n t\u1eebng c\u1ea5p m\u1ed9t v\u00e0 ghi l\u1ea1i d\u00f2ng \u0111i\u1ec7n, \u0111i\u1ec7n \u00e1p, kVAr, h\u1ec7 s\u1ed1 c\u00f4ng su\u1ea5t, nhi\u1ec7t \u0111\u1ed9 v\u00e0 t\u1ed5ng m\u00e9o d\u1ea1ng s\u00f3ng h\u00e0i. X\u00e1c nh\u1eadn r\u1eb1ng b\u1ed9 \u0111i\u1ec1u khi\u1ec3n ng\u1eaft c\u00e1c c\u1ea5p khi t\u1ea3i gi\u1ea3m.<\/p>\n<figure class=\"wp-block-image\"><img decoding=\"async\" alt=\"Engineer measuring power factor and harmonics with a power quality analyzer\" src=\"https:\/\/lbajiele.com\/wp-content\/uploads\/2026\/09\/26-03-1.jpg\"\/><figcaption>T\u1ea3i tr\u1ecdng \u0111\u01b0\u1ee3c \u0111o \u0111\u1ea1c v\u00e0 h\u1ed3 s\u01a1 s\u00f3ng h\u00e0i mang l\u1ea1i l\u1ef1a ch\u1ecdn t\u1ee5 \u0111i\u1ec7n an to\u00e0n h\u01a1n so v\u1edbi vi\u1ec7c t\u00ednh to\u00e1n ch\u1ec9 d\u1ef1a tr\u00ean c\u00f4ng su\u1ea5t \u0111\u1ecbnh m\u1ee9c c\u1ee7a \u0111\u1ed9ng c\u01a1 \u0111\u01b0\u1ee3c l\u1eafp \u0111\u1eb7t.<\/figcaption><\/figure>\n<p>Trong qu\u00e1 tr\u00ecnh v\u1eadn h\u00e0nh, h\u00e3y ki\u1ec3m tra hi\u1ec7n t\u01b0\u1ee3ng ph\u1ed3ng, r\u00f2 r\u1ec9, \u0111\u1ed5i m\u00e0u, l\u1ecfng m\u1ed1i n\u1ed1i, qu\u1ea1t h\u1ecfng, ti\u1ebfng \u1ed3n b\u1ea5t th\u01b0\u1eddng, d\u00f2ng \u0111i\u1ec7n c\u00e1c pha kh\u00f4ng \u0111\u1ec1u v\u00e0 c\u1ea7u ch\u00ec ho\u1ea1t \u0111\u1ed9ng l\u1eb7p \u0111i l\u1eb7p l\u1ea1i. Theo d\u00f5i xu h\u01b0\u1edbng c\u00e1c ch\u1ec9 s\u1ed1 h\u1ec7 s\u1ed1 c\u00f4ng su\u1ea5t v\u00e0 s\u00f3ng h\u00e0i thay v\u00ec ch\u1ec9 d\u1ef1a v\u00e0o m\u00e0n h\u00ecnh hi\u1ec3n th\u1ecb c\u1ee7a b\u1ed9 \u0111i\u1ec1u khi\u1ec3n. S\u1ef1 c\u1ed1 l\u1eb7p l\u1ea1i l\u00e0 m\u1ed9t c\u1ea3nh b\u00e1o h\u1ec7 th\u1ed1ng \u0111\u00f2i h\u1ecfi ph\u1ea3i \u0111i\u1ec1u tra, ch\u1ee9 kh\u00f4ng ch\u1ec9 \u0111\u01a1n thu\u1ea7n l\u00e0 thay th\u1ebf m\u1ed9t t\u1ee5 \u0111i\u1ec7n kh\u00e1c.<\/p>\n<h2>C\u00e1ch x\u00e1c \u0111\u1ecbnh h\u1ec7 th\u1ed1ng hi\u1ec7u ch\u1ec9nh ph\u00f9 h\u1ee3p<\/h2>\n<p>Cung c\u1ea5p cho nh\u00e0 cung c\u1ea5p \u0111i\u1ec7n \u00e1p v\u00e0 t\u1ea7n s\u1ed1 h\u1ec7 th\u1ed1ng, c\u00e1c bi\u1ec3u \u0111\u1ed3 kW\/kVAr\/PF \u0111\u00e3 \u0111o, c\u00f4ng su\u1ea5t \u0111\u1ecbnh m\u1ee9c v\u00e0 t\u1ed5ng tr\u1edf c\u1ee7a m\u00e1y bi\u1ebfn \u00e1p, m\u1ee9c \u0111\u1ed9 ng\u1eafn m\u1ea1ch, ph\u1ed5 s\u00f3ng h\u00e0i, chu k\u1ef3 chuy\u1ec3n m\u1ea1ch t\u1ea3i, \u0111i\u1ec1u ki\u1ec7n m\u00f4i tr\u01b0\u1eddng xung quanh, y\u00eau c\u1ea7u v\u1ec1 v\u1ecf t\u1ee7, m\u1ee9c \u0111\u1ed9 s\u1ef1 c\u1ed1 kh\u1ea3 d\u1ee5ng v\u00e0 h\u1ec7 s\u1ed1 c\u00f4ng su\u1ea5t m\u1ee5c ti\u00eau mong mu\u1ed1n. Th\u00f4ng tin n\u00e0y cho ph\u00e9p nh\u00e0 s\u1ea3n xu\u1ea5t l\u1ef1a ch\u1ecdn k\u00edch th\u01b0\u1edbc c\u00e1c c\u1ea5p, \u0111i\u1ec7n \u00e1p \u0111\u1ecbnh m\u1ee9c c\u1ee7a t\u1ee5 \u0111i\u1ec7n, kh\u00e1ng l\u1ecdc s\u00f3ng h\u00e0i, c\u00f4ng ngh\u1ec7 chuy\u1ec3n m\u1ea1ch, thi\u1ebft b\u1ecb b\u1ea3o v\u1ec7 v\u00e0 h\u1ec7 th\u1ed1ng th\u00f4ng gi\u00f3 nh\u01b0 m\u1ed9t h\u1ec7 th\u1ed1ng \u0111\u1ed3ng b\u1ed9.<\/p>\n<!-- lbaji-dataforseo-gaps:start -->\n<section class=\"lbaji-serp-gap\"><h2>C\u00e1c ph\u01b0\u01a1ng ph\u00e1p n\u00e2ng cao h\u1ec7 s\u1ed1 c\u00f4ng su\u1ea5t<\/h2><p>Vi\u1ec7c hi\u1ec7u ch\u1ec9nh c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c \u00e1p d\u1ee5ng t\u1ea1i t\u1eebng \u0111\u1ed9ng c\u01a1 ri\u00eang l\u1ebb, m\u1ed9t t\u1ee7 \u0111i\u1ec7n nh\u00f3m ho\u1eb7c thanh c\u00e1i ch\u00ednh. C\u00e1c t\u1ee5 \u0111i\u1ec7n c\u1ed1 \u0111\u1ecbnh ph\u00f9 h\u1ee3p v\u1edbi t\u1ea3i \u1ed5n \u0111\u1ecbnh; c\u00e1c d\u00e3y t\u1ee5 t\u1ef1 \u0111\u1ed9ng theo d\u00f5i nhu c\u1ea7u thay \u0111\u1ed5i; c\u00e1c h\u1ec7 th\u1ed1ng \u0111\u1ed9ng ho\u1eb7c ch\u1ee7 \u0111\u1ed9ng ph\u00f9 h\u1ee3p v\u1edbi s\u1ef1 bi\u1ebfn thi\u00ean nhanh. V\u1ecb tr\u00ed l\u1eafp \u0111\u1eb7t l\u00e0m thay \u0111\u1ed5i t\u1ea3i c\u1ee7a c\u00e1p, t\u1ea7n s\u1ed1 \u0111\u00f3ng c\u1eaft v\u00e0 nguy c\u01a1 b\u00f9 qu\u00e1 m\u1ee9c.<\/p><\/section>\n<section class=\"lbaji-serp-gap\"><h2>T\u1ee5 \u0111i\u1ec7n b\u00f9 c\u00f4ng su\u1ea5t ph\u1ea3n kh\u00e1ng (PFC) trong h\u1ec7 th\u1ed1ng ch\u1ee9a nhi\u1ec1u s\u00f3ng h\u00e0i<\/h2><p>Bi\u1ebfn t\u1ea7n, thi\u1ebft b\u1ecb UPS v\u00e0 b\u1ed9 ch\u1ec9nh l\u01b0u c\u00f3 th\u1ec3 \u0111\u01b0a d\u00f2ng \u0111i\u1ec7n s\u00f3ng h\u00e0i v\u00e0o t\u1ee5 \u0111i\u1ec7n v\u00e0 t\u1ea1o ra hi\u1ec7n t\u01b0\u1ee3ng c\u1ed9ng h\u01b0\u1edfng v\u1edbi \u0111i\u1ec7n c\u1ea3m c\u1ee7a h\u1ec7 th\u1ed1ng. H\u00e3y \u0111o ph\u1ed5 v\u00e0 l\u1eadp m\u00f4 h\u00ecnh m\u1ea1ng l\u01b0\u1edbi tr\u01b0\u1edbc khi ch\u1ecdn m\u1ed9t d\u00e3y t\u1ee5 th\u00f4ng th\u01b0\u1eddng. C\u00e1c cu\u1ed9n kh\u00e1ng l\u1ecdc s\u00f3ng h\u00e0i, \u0111i\u1ec7n \u00e1p \u0111\u1ecbnh m\u1ee9c c\u1ee7a t\u1ee5 cao h\u01a1n ho\u1eb7c b\u1ed9 l\u1ecdc ch\u1ee7 \u0111\u1ed9ng c\u00f3 th\u1ec3 l\u00e0 c\u1ea7n thi\u1ebft, ti\u1ebfp theo l\u00e0 c\u00e1c ph\u00e9p \u0111o khi v\u1eadn h\u00e0nh th\u1eed nghi\u1ec7m d\u01b0\u1edbi t\u1ea3i \u0111\u1ea1i di\u1ec7n.<\/p><\/section>\n<!-- lbaji-dataforseo-gaps:end -->\n<!-- lbaji-references:start -->\n<section aria-labelledby=\"technical-references-heading\" class=\"lbaji-technical-references\">\n<h2 id=\"technical-references-heading\">T\u00e0i li\u1ec7u k\u1ef9 thu\u1eadt v\u00e0 \u0111\u1ecdc th\u00eam<\/h2>\n<p>C\u00e1c ngu\u1ed3n \u0111\u1ed9c l\u1eadp sau \u0111\u00e2y h\u1ed7 tr\u1ee3 c\u00e1c ti\u00eau chu\u1ea9n, thu\u1eadt ng\u1eef, ph\u00e9p t\u00ednh v\u00e0 b\u1ed1i c\u1ea3nh an to\u00e0n \u0111\u01b0\u1ee3c th\u1ea3o lu\u1eadn trong h\u01b0\u1edbng d\u1eabn n\u00e0y:<\/p>\n<ul><li><a href=\"https:\/\/www.nist.gov\/pml\/owm\/si-units-electric-current\" rel=\"noopener nofollow\" target=\"_blank\">C\u00e1c \u0111\u01a1n v\u1ecb SI c\u1ee7a NIST \u0111\u1ed1i v\u1edbi d\u00f2ng \u0111i\u1ec7n \u0111i\u1ec7n t\u1eed<\/a> \u2014 C\u00e1c \u0111\u1ecbnh ngh\u0129a c\u00f3 th\u1ea9m quy\u1ec1n v\u00e0 m\u1ed1i quan h\u1ec7 gi\u1eefa ampe, v\u00f4n, o\u00e1t v\u00e0 \u00f4m.<\/li>\n<li><a href=\"https:\/\/www.nist.gov\/pml\/special-publication-811\/nist-guide-si-appendix-b-conversion-factors\/nist-guide-si-appendix-b9\" rel=\"noopener nofollow\" target=\"_blank\">H\u01b0\u1edbng d\u1eabn c\u1ee7a NIST v\u1ec1 c\u00e1c h\u1ec7 s\u1ed1 chuy\u1ec3n \u0111\u1ed5i \u0111i\u1ec7n SI<\/a> \u2014 H\u1ec7 s\u1ed1 chuy\u1ec3n \u0111\u1ed5i ch\u00ednh th\u1ee9c cho \u0111i\u1ec7n, t\u1eeb t\u00ednh, n\u0103ng l\u01b0\u1ee3ng v\u00e0 c\u00e1c \u0111\u1ea1i l\u01b0\u1ee3ng li\u00ean quan.<\/li>\n<li><a href=\"https:\/\/www.osha.gov\/laws-regs\/regulations\/standardnumber\/1926\/1926SubpartV\" rel=\"noopener nofollow\" target=\"_blank\">Y\u00eau c\u1ea7u v\u1ec1 an to\u00e0n \u0111i\u1ec7n c\u1ee7a OSHA<\/a> \u2014 B\u1ed1i c\u1ea3nh an to\u00e0n khi \u00e1p d\u1ee5ng c\u00e1c t\u00ednh to\u00e1n \u0111i\u1ec7n v\u00e0o c\u00f4ng vi\u1ec7c truy\u1ec1n t\u1ea3i v\u00e0 ph\u00e2n ph\u1ed1i \u0111i\u1ec7n.<\/li><\/ul>\n<\/section>\n<!-- lbaji-references:end -->\n\n<p>S\u1eed d\u1ee5ng <a href=\"https:\/\/lbajiele.com\/vi\/blog\/power-factor-of-motor-guide\/\">\u0111i\u1ec7n n\u0103ng c\u1ee7a \u0111\u1ed9ng c\u01a1 h\u01b0\u1edbng d\u1eabn<\/a> v\u1ec1 h\u00e0nh vi \u0111\u1eb7c tr\u01b0ng c\u1ee7a \u0111\u1ed9ng c\u01a1 v\u00e0 <a href=\"https:\/\/lbajiele.com\/vi\/blog\/leading-vs-lagigng-current-power-factor-comparison-guide\/\">So s\u00e1nh gi\u1eefa nh\u1eefng ng\u01b0\u1eddi \u0111i \u0111\u1ea7u v\u00e0 nh\u1eefng ng\u01b0\u1eddi c\u00f2n t\u1ee5t h\u1eadu<\/a> \u0111\u1ed1i v\u1edbi c\u00e1c quy \u01b0\u1edbc v\u1ec1 ch\u1eef vi\u1ebft. <a href=\"https:\/\/lbajiele.com\/vi\/blog\/complete-guide-to-low-voltage-switchgear\/\">H\u01b0\u1edbng d\u1eabn v\u1ec1 thi\u1ebft b\u1ecb \u0111\u00f3ng c\u1eaft h\u1ea1 th\u1ebf<\/a> cung c\u1ea5p b\u1ed1i c\u1ea3nh v\u1ec1 thi\u1ebft b\u1ecb li\u00ean quan.<\/p>\n<figure class=\"wp-block-image\"><img decoding=\"async\" alt=\"LBAJI GGD switchgear with power-quality analyzer display\" src=\"https:\/\/lbajiele.com\/wp-content\/uploads\/2026\/09\/26-04-1.jpg\" loading=\"lazy\"\/><figcaption>\u0110o c\u00e1c th\u00f4ng s\u1ed1 kW, kvar, kVA v\u00e0 \u0111i\u1ec1u ki\u1ec7n h\u00e0i h\u00f2a t\u1ea1i bi\u00ean gi\u1edbi \u0111\u01b0\u1ee3c x\u00e1c \u0111\u1ecbnh tr\u01b0\u1edbc khi ch\u1ecdn ph\u01b0\u01a1ng ph\u00e1p \u0111i\u1ec1u ch\u1ec9nh.<\/figcaption><\/figure><h2>C\u00e1ch s\u1eed d\u1ee5ng m\u00e1y t\u00ednh h\u1ec7 s\u1ed1 c\u00f4ng su\u1ea5t m\u1ed9t c\u00e1ch an to\u00e0n<\/h2><p>Nh\u1eadp c\u00e1c gi\u00e1 tr\u1ecb t\u1eeb c\u00f9ng m\u1ed9t kho\u1ea3ng \u0111o v\u00e0 bi\u00ean gi\u1edbi. N\u1ebfu m\u00e1y t\u00ednh c\u00f3 th\u1ec3 ch\u1ea5p nh\u1eadn kW v\u00e0 kVA, h\u00e3y t\u00ednh PF theo c\u00f4ng th\u1ee9c kW chia cho kVA v\u00e0 gi\u1eef ri\u00eang d\u1ea5u th\u1eadp ph\u00e2n ho\u1eb7c ch\u1ec9 b\u00e1o \u0111\u1ed9 ch\u00eanh l\u1ec7ch. N\u1ebfu m\u00e1y t\u00ednh c\u00f3 th\u1ec3 ch\u1ea5p nh\u1eadn kW, h\u00e3y \u0111\u01b0a ra PF v\u00e0 gi\u00e1 tr\u1ecb m\u1ee5c ti\u00eau, s\u1eed d\u1ee5ng c\u00e1c g\u00f3c \u0111\u01b0\u1ee3c bi\u1ec3u th\u1ecb b\u1edfi m\u1ed7i gi\u00e1 tr\u1ecb PF, sau \u0111\u00f3 t\u00ednh to\u00e1n s\u1ef1 b\u00f9 ph\u1ee5 t\u1ea3i c\u1ea7n thi\u1ebft v\u1edbi Qc = P \u00d7 (tan \u03c61 \u2212 tan \u03c62). K\u1ebft qu\u1ea3 l\u00e0 \u01b0\u1edbc l\u01b0\u1ee3ng kvar, kh\u00f4ng ph\u1ea3i l\u00e0 ch\u1ec9 s\u1ed1 cu\u1ed1i c\u00f9ng c\u1ee7a c\u1ee5m t\u1ee5 \u0111i\u1ec7n.<\/p><p>Ki\u1ec3m tra xem PF \u0111o \u0111\u01b0\u1ee3c c\u00f3 ph\u1ea3i l\u00e0 PF th\u1ef1c t\u1ebf hay l\u00e0 PF bi\u1ebfn \u0111\u1ed5i, t\u1ea3i c\u00f3 c\u00e2n b\u1eb1ng hay kh\u00f4ng v\u00e0 d\u00f2ng \u0111i\u1ec7n h\u00e0i h\u00f2a c\u00f3 \u0111\u00e1ng k\u1ec3 hay kh\u00f4ng. M\u1ed9t c\u1ee5m t\u1ee5 \u0111i\u1ec7n \u0111\u01b0\u1ee3c ch\u1ecdn t\u1eeb m\u1ed9t gi\u00e1 tr\u1ecb t\u1ea3i \u0111\u01a1n c\u00f3 th\u1ec3 c\u00f3 \u0111\u1ed9 sai l\u1ec7ch qu\u00e1 m\u1ee9c khi \u0111\u1ed9ng c\u01a1 ng\u1eebng ho\u1ea1t \u0111\u1ed9ng. Tr\u01b0\u1edbc khi mua, h\u00e3y x\u00e1c nh\u1eadn v\u1ecb tr\u00ed c\u1ee7a b\u1ed9 \u0111i\u1ec1u khi\u1ec3n CT, \u0111\u1ed9 tr\u1ec5 chuy\u1ec3n \u0111\u1ed5i, th\u1eddi gian x\u1ea3, y\u00eau c\u1ea7u c\u1ee7a thi\u1ebft b\u1ecb ph\u1ea3n x\u1ea1 v\u00e0 gi\u1edbi h\u1ea1n \u0111i\u1ec7n \u00e1p v\u00e0 d\u00f2ng \u0111i\u1ec7n c\u1ee7a nh\u00e0 s\u1ea3n xu\u1ea5t.<\/p><h2>Video k\u1ef9 thu\u1eadt trung l\u1eadp<\/h2><p>Video v\u1ec1 ch\u1ea5t l\u01b0\u1ee3ng \u0111i\u1ec7n trung l\u1eadp n\u00e0y b\u1ed5 sung cho ph\u01b0\u01a1ng ph\u00e1p t\u00ednh to\u00e1n; x\u00e1c nh\u1eadn thi\u1ebft k\u1ebf cu\u1ed1i c\u00f9ng d\u1ef1a tr\u00ean d\u1eef li\u1ec7u \u0111o t\u1ea1i \u0111\u1ecba \u0111i\u1ec3m v\u00e0 c\u00e1c ti\u00eau chu\u1ea9n \u00e1p d\u1ee5ng.<\/p><iframe width=\"560\" height=\"315\" src=\"https:\/\/www.youtube-nocookie.com\/embed\/4oRT7PoXSS0\" title=\"Nguy\u00ean t\u1eafc \u0111o c\u00f4ng su\u1ea5t v\u00e0 ch\u1ea5t l\u01b0\u1ee3ng \u0111i\u1ec7n\" loading=\"lazy\" allowfullscreen><\/iframe>","protected":false},"excerpt":{"rendered":"<p>A calculator for power factor supplies reactive power close to an inductive load, reducing the reactive current drawn from the utility. Correctly applied, a capacitor bank can lower current, release transformer and cable capacity, reduce losses, and help avoid utility penalties. The design must match the real load profile and harmonic environment; simply installing the [&hellip;]<\/p>\n","protected":false},"author":6,"featured_media":3779,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[53],"tags":[76,83],"class_list":["post-3794","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-switchgear-protection","tag-medium-voltage-switchgear","tag-power-distribution"],"blocksy_meta":[],"acf":[],"_links":{"self":[{"href":"https:\/\/lbajiele.com\/vi\/wp-json\/wp\/v2\/posts\/3794","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=3794"}],"version-history":[{"count":1,"href":"https:\/\/lbajiele.com\/vi\/wp-json\/wp\/v2\/posts\/3794\/revisions"}],"predecessor-version":[{"id":3799,"href":"https:\/\/lbajiele.com\/vi\/wp-json\/wp\/v2\/posts\/3794\/revisions\/3799"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/lbajiele.com\/vi\/wp-json\/wp\/v2\/media\/3779"}],"wp:attachment":[{"href":"https:\/\/lbajiele.com\/vi\/wp-json\/wp\/v2\/media?parent=3794"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/lbajiele.com\/vi\/wp-json\/wp\/v2\/categories?post=3794"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/lbajiele.com\/vi\/wp-json\/wp\/v2\/tags?post=3794"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}