{"id":2359,"date":"2026-08-11T09:00:00","date_gmt":"2026-08-11T01:00:00","guid":{"rendered":"https:\/\/cnbygele.com\/blog\/thd-vs-tdd-measurement-plant-engineers\/"},"modified":"2026-08-24T17:24:03","modified_gmt":"2026-08-24T09:24:03","slug":"thd-vs-tdd-measurement-plant-engineers","status":"publish","type":"post","link":"https:\/\/cnbygele.com\/vi\/blog\/thd-vs-tdd-measurement-plant-engineers\/","title":{"rendered":"THD so v\u1edbi TDD: K\u1ef9 s\u01b0 nh\u00e0 m\u00e1y n\u00ean \u0111o \u1edf \u0111\u00e2u"},"content":{"rendered":"<div class=\"b2b-article\">\n<p style=\"margin:0 0 16px;line-height:1.7\">THD v\u00e0 TDD ch\u1ec9 tr\u1edf th\u00e0nh d\u1eef li\u1ec7u k\u1ef9 thu\u1eadt h\u1eefu \u00edch khi v\u1ecb tr\u00ed \u0111i\u1ec7n, d\u00f2ng \u0111i\u1ec7n tham chi\u1ebfu v\u00e0 tr\u1ea1ng th\u00e1i v\u1eadn h\u00e0nh \u0111\u01b0\u1ee3c l\u01b0u gi\u1eef c\u00f9ng v\u1edbi gi\u00e1 tr\u1ecb \u0111o. \u0110\u1ea7u v\u00e0o c\u1ee7a m\u1ed9t bi\u1ebfn t\u1ea7n VFD t\u1ea1i ch\u1ed7, m\u1ed9t \u0111\u01b0\u1eddng c\u1ea5p \u0111i\u1ec7n cho quy tr\u00ecnh s\u1ea3n xu\u1ea5t v\u00e0 ranh gi\u1edbi \u0111i\u1ec3m \u0111\u1ea5u n\u1ed1i chung kh\u00f4ng ph\u1ea3i l\u00e0 nh\u1eefng \u0111i\u1ec3m \u0111o c\u00f3 th\u1ec3 thay th\u1ebf cho nhau, ngay c\u1ea3 khi thi\u1ebft b\u1ecb \u0111o hi\u1ec3n th\u1ecb c\u00f9ng m\u1ed9t lo\u1ea1i gi\u00e1 tr\u1ecb ph\u1ea7n tr\u0103m.<\/p>\n<p style=\"margin:0 0 16px;line-height:1.7\">B\u1eaft \u0111\u1ea7u v\u1edbi <a href=\"https:\/\/cnbygele.com\/vi\/power-quality-system-guides\/\">h\u01b0\u1edbng d\u1eabn h\u1ec7 th\u1ed1ng ch\u1ea5t l\u01b0\u1ee3ng \u0111i\u1ec7n n\u0103ng<\/a> \u0111\u1ec3 c\u00f3 b\u1ed1i c\u1ea3nh l\u1eadp k\u1ebf ho\u1ea1ch t\u1ed5ng th\u1ec3 h\u01a1n. B\u00e0i vi\u1ebft n\u00e0y gi\u1ea3i th\u00edch c\u00e1ch duy tr\u00ec kh\u1ea3 n\u0103ng ki\u1ec3m tra v\u00e0 \u0111\u1ed1i chi\u1ebfu c\u1ee7a ph\u00e9p so s\u00e1nh THD\/TDD; kh\u00f4ng thi\u1ebft l\u1eadp gi\u1edbi h\u1ea1n cho nh\u00e0 m\u00e1y, quy m\u00f4 thi\u1ebft b\u1ecb ho\u1eb7c k\u1ebft qu\u1ea3 d\u1ef1 \u00e1n.<\/p>\n<figure style=\"margin:26px 0;text-align:center\"><img decoding=\"async\" style=\"max-width:640px;width:100%;height:auto;display:block;margin:0 auto;border-radius:8px\" src=\"https:\/\/cnbygele.com\/wp-content\/uploads\/2026\/04\/12.BY83.webp\" alt=\"Thi\u1ebft b\u1ecb b\u1ea3ng \u0111i\u1ec7n CNBYG d\u00f9ng \u0111\u1ec3 ghi nh\u1eadn qu\u00e1 tr\u00ecnh r\u00e0 so\u00e1t k\u1ebft qu\u1ea3 \u0111o THD v\u00e0 TDD\" \/><\/figure>\n<nav class=\"b2b-toc\" style=\"background:#f5f8fa;padding:16px 20px;border-radius:8px;margin:0 0 24px\">\n<h2 id=\"contents\" style=\"margin:42px 0 14px;scroll-margin-top:96px\">M\u1ee5c l\u1ee5c<\/h2>\n<ul style=\"margin:0 0 18px 1.2em;line-height:1.7\">\n<li style=\"margin:0 0 8px\"><a href=\"#part-1-start-with-the-decision-boundary\">Ph\u1ea7n 1. B\u1eaft \u0111\u1ea7u v\u1edbi ranh gi\u1edbi quy\u1ebft \u0111\u1ecbnh<\/a><\/li>\n<li style=\"margin:0 0 8px\"><a href=\"#part-2-keep-the-denominator-with-the-number\">Ph\u1ea7n 2. L\u01b0u gi\u1eef m\u1eabu s\u1ed1 c\u00f9ng v\u1edbi gi\u00e1 tr\u1ecb \u0111o<\/a><\/li>\n<li style=\"margin:0 0 8px\"><a href=\"#part-3-place-meters-for-the-question-being-asked\">Ph\u1ea7n 3. B\u1ed1 tr\u00ed thi\u1ebft b\u1ecb \u0111o ph\u00f9 h\u1ee3p v\u1edbi m\u1ee5c \u0111\u00edch ki\u1ec3m tra<\/a><\/li>\n<li style=\"margin:0 0 8px\"><a href=\"#part-4-log-states-that-make-readings-comparable\">Ph\u1ea7n 4. Ghi l\u1ea1i c\u00e1c tr\u1ea1ng th\u00e1i gi\u00fap so s\u00e1nh c\u00e1c k\u1ebft qu\u1ea3 \u0111o<\/a><\/li>\n<li style=\"margin:0 0 8px\"><a href=\"#part-5-separate-index-review-from-equipment-selection\">Ph\u1ea7n 5. T\u00e1ch bi\u1ec7t vi\u1ec7c \u0111\u00e1nh gi\u00e1 ch\u1ec9 s\u1ed1 kh\u1ecfi vi\u1ec7c l\u1ef1a ch\u1ecdn thi\u1ebft b\u1ecb<\/a><\/li>\n<li style=\"margin:0 0 8px\"><a href=\"#part-6-send-a-reviewable-measurement-package\">Ph\u1ea7n 6. G\u1eedi b\u1ed9 d\u1eef li\u1ec7u \u0111o l\u01b0\u1eddng c\u00f3 th\u1ec3 ki\u1ec3m tra v\u00e0 \u0111\u1ed1i chi\u1ebfu<\/a><\/li>\n<\/ul>\n<\/nav>\n<h2 style=\"margin:42px 0 14px;scroll-margin-top:96px\" id=\"direct-answer\">Tr\u1ea3 l\u1eddi tr\u1ef1c ti\u1ebfp<\/h2>\n<p style=\"margin:0 0 16px;line-height:1.7\">Ch\u1ec9 so s\u00e1nh THD v\u00e0 TDD sau khi x\u00e1c \u0111\u1ecbnh ranh gi\u1edbi \u0111\u00e1nh gi\u00e1 v\u00e0 l\u01b0u gi\u1eef d\u00f2ng \u0111i\u1ec7n tham chi\u1ebfu \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong ph\u00e9p t\u00ednh. \u00dd ngh\u0129a c\u1ee7a gi\u00e1 tr\u1ecb \u0111o ph\u1ee5 thu\u1ed9c v\u00e0o v\u1ecb tr\u00ed \u0111o, thi\u1ebft b\u1ecb n\u00e0o \u0111ang ho\u1ea1t \u0111\u1ed9ng v\u00e0 c\u01a1 s\u1edf tham chi\u1ebfu n\u00e0o \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong b\u00e1o c\u00e1o.<\/p>\n<h2 style=\"margin:42px 0 14px;scroll-margin-top:96px\" id=\"part-1-start-with-the-decision-boundary\">Ph\u1ea7n 1. B\u1eaft \u0111\u1ea7u v\u1edbi ranh gi\u1edbi quy\u1ebft \u0111\u1ecbnh<\/h2>\n<p style=\"margin:0 0 16px;line-height:1.7\">Tr\u01b0\u1edbc khi thu th\u1eadp c\u00e1c gi\u00e1 tr\u1ecb, h\u00e3y ghi r\u00f5 c\u00e2u h\u1ecfi k\u1ef9 thu\u1eadt c\u1ea7n gi\u1ea3i quy\u1ebft. Nh\u00f3m k\u1ef9 thu\u1eadt c\u00f3 th\u1ec3 \u0111ang \u0111\u00e1nh gi\u00e1 m\u1ed9t bi\u1ebfn t\u1ea7n, so s\u00e1nh m\u1ed9t \u0111\u01b0\u1eddng c\u1ea5p \u0111i\u1ec7n cho d\u00e2y chuy\u1ec1n s\u1ea3n xu\u1ea5t ho\u1eb7c chu\u1ea9n b\u1ecb d\u1eef li\u1ec7u cho vi\u1ec7c \u0111\u00e1nh gi\u00e1 ph\u00eda ngu\u1ed3n cung c\u1ea5p \u0111i\u1ec7n. M\u1ed7i m\u1ee5c \u0111\u00edch \u0111\u00f2i h\u1ecfi m\u1ed9t v\u1ecb tr\u00ed \u0111o \u0111i\u1ec7n kh\u00e1c nhau v\u00e0 m\u1ed9t t\u1eadp h\u1ee3p t\u1ea3i \u0111\u1ed3ng th\u1eddi kh\u00e1c nhau.<\/p>\n<p style=\"margin:0 0 16px;line-height:1.7\">\u0110\u00e1nh d\u1ea5u \u0111i\u1ec3m \u0111o, \u0111i\u1ec7n \u00e1p tham chi\u1ebfu v\u00e0 h\u01b0\u1edbng l\u1eafp \u0111\u1eb7t CT tr\u00ean s\u01a1 \u0111\u1ed3 m\u1ed9t s\u1ee3i. L\u01b0u gi\u1eef t\u1ef7 s\u1ed1 bi\u1ebfn d\u00f2ng CT, kho\u1ea3ng th\u1eddi gian thu th\u1eadp d\u1eef li\u1ec7u, c\u01a1 s\u1edf th\u1eddi gian v\u00e0 ng\u01b0\u1eddi ch\u1ecbu tr\u00e1ch nhi\u1ec7m \u0111\u00e1nh gi\u00e1. Ng\u01b0\u1eddi \u0111\u1ecdc sau n\u00e0y ph\u1ea3i c\u00f3 kh\u1ea3 n\u0103ng x\u00e1c \u0111\u1ecbnh li\u1ec7u b\u1ea3n ghi \u0111\u01b0\u1ee3c xu\u1ea5t ra \u0111\u1ea1i di\u1ec7n cho \u0111\u1ea7u v\u00e0o c\u1ee5c b\u1ed9 hay \u0111\u01b0\u1eddng c\u1ea5p \u0111i\u1ec7n d\u00f9ng chung.<\/p>\n<p style=\"margin:0 0 16px;line-height:1.7\"><strong>Quan tr\u1ecdng:<\/strong> Kh\u00f4ng xem ph\u00e9p \u0111o t\u1ea1i m\u1ed9t v\u1ecb tr\u00ed c\u1ee5c b\u1ed9 l\u00e0 b\u1eb1ng ch\u1ee9ng cho to\u00e0n b\u1ed9 ranh gi\u1edbi \u0111\u00e1nh gi\u00e1 r\u1ed9ng h\u01a1n. V\u1ecb tr\u00ed \u0111\u00e1nh gi\u00e1, \u0111i\u1ec1u ki\u1ec7n v\u1eadn h\u00e0nh v\u00e0 ph\u01b0\u01a1ng ph\u00e1p nghi\u1ec7m thu ph\u1ea3i \u0111\u01b0\u1ee3c th\u1ed1ng nh\u1ea5t \u0111\u1ed3ng th\u1eddi (<a href=\"https:\/\/standards.ieee.org\/ieee\/519\/5892\/\" rel=\"nofollow noopener\" target=\"_blank\">T\u1ed5ng quan v\u1ec1 IEEE 519<\/a>).<\/p>\n<table style=\"width:100%;border-collapse:collapse\">\n<thead>\n<tr>\n<th style=\"border:1px solid #d9e1e8;padding:9px 12px;background:#f5f8fa;text-align:left\">Quy\u1ebft \u0111\u1ecbnh c\u1ea7n h\u1ed7 tr\u1ee3<\/th>\n<th style=\"border:1px solid #d9e1e8;padding:9px 12px;background:#f5f8fa;text-align:left\">Ranh gi\u1edbi ghi nh\u1eadn ph\u00f9 h\u1ee3p<\/th>\n<th style=\"border:1px solid #d9e1e8;padding:9px 12px;background:#f5f8fa;text-align:left\">Th\u00f4ng tin ph\u1ea3i \u0111\u01b0\u1ee3c l\u01b0u k\u00e8m theo<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td style=\"border:1px solid #d9e1e8;padding:9px 12px\">Ch\u1ea9n \u0111o\u00e1n m\u1ed9t nh\u00f3m bi\u1ebfn t\u1ea7n<\/td>\n<td style=\"border:1px solid #d9e1e8;padding:9px 12px\">\u0110\u1ea7u v\u00e0o c\u1ee7a bi\u1ebfn t\u1ea7n ho\u1eb7c \u0111\u01b0\u1eddng c\u1ea5p \u0111i\u1ec7n c\u1ee5c b\u1ed9 \u0111\u00e3 x\u00e1c \u0111\u1ecbnh<\/td>\n<td style=\"border:1px solid #d9e1e8;padding:9px 12px\">Nh\u1eadn d\u1ea1ng bi\u1ebfn t\u1ea7n, tr\u1ea1ng th\u00e1i v\u1eadn h\u00e0nh, CT v\u00e0 \u0111i\u1ec7n \u00e1p tham chi\u1ebfu<\/td>\n<\/tr>\n<tr>\n<td style=\"border:1px solid #d9e1e8;padding:9px 12px\">So s\u00e1nh m\u1ed9t khu v\u1ef1c quy tr\u00ecnh<\/td>\n<td style=\"border:1px solid #d9e1e8;padding:9px 12px\">S\u01a1 \u0111\u1ed3 c\u1ea5p ngu\u1ed3n cho quy tr\u00ecnh<\/td>\n<td style=\"border:1px solid #d9e1e8;padding:9px 12px\">C\u00e1c t\u1ea3i \u0111ang v\u1eadn h\u00e0nh v\u00e0 v\u1ecb tr\u00ed tr\u00ean s\u01a1 \u0111\u1ed3 m\u1ed9t s\u1ee3i c\u1ee7a \u0111\u01b0\u1eddng d\u00e2y c\u1ea5p ngu\u1ed3n<\/td>\n<\/tr>\n<tr>\n<td style=\"border:1px solid #d9e1e8;padding:9px 12px\">Chu\u1ea9n b\u1ecb n\u1ed9i dung th\u1ea3o lu\u1eadn v\u1ec1 h\u1ec7 th\u1ed1ng<\/td>\n<td style=\"border:1px solid #d9e1e8;padding:9px 12px\">Ranh gi\u1edbi ph\u00eda ngu\u1ed3n c\u1ea5p ho\u1eb7c ranh gi\u1edbi chung \u0111\u00e3 x\u00e1c \u0111\u1ecbnh<\/td>\n<td style=\"border:1px solid #d9e1e8;padding:9px 12px\">Ph\u1ea1m vi d\u1ef1 \u00e1n, kho\u1ea3ng th\u1eddi gian v\u00e0 ng\u01b0\u1eddi ph\u1ee5 tr\u00e1ch \u0111\u00e1nh gi\u00e1<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h2 style=\"margin:42px 0 14px;scroll-margin-top:96px\" id=\"part-2-keep-the-denominator-with-the-number\">Ph\u1ea7n 2. L\u01b0u gi\u1eef m\u1eabu s\u1ed1 c\u00f9ng v\u1edbi gi\u00e1 tr\u1ecb \u0111o<\/h2>\n<p style=\"margin:0 0 16px;line-height:1.7\">THD v\u00e0 TDD kh\u00f4ng ph\u1ea3i l\u00e0 nh\u1eefng nh\u00e3n c\u00f3 th\u1ec3 t\u00e1ch r\u1eddi kh\u1ecfi b\u00e1o c\u00e1o. Vi\u1ec7c so s\u00e1nh c\u1ea7n n\u00eau r\u00f5 c\u01a1 s\u1edf tham chi\u1ebfu hi\u1ec7n t\u1ea1i \u0111\u01b0\u1ee3c c\u00f4ng t\u01a1 ho\u1eb7c ph\u00e9p t\u00ednh s\u1eed d\u1ee5ng, \u0111\u1ed3ng th\u1eddi gi\u1eef nguy\u00ean c\u1ea5u h\u00ecnh li\u00ean quan. N\u1ebfu thi\u1ebfu b\u1ed1i c\u1ea3nh n\u00e0y, m\u1ed9t t\u1ef7 l\u1ec7 ph\u1ea7n tr\u0103m c\u00f3 th\u1ec3 tr\u00f4ng nghi\u00eam tr\u1ecdng h\u01a1n ho\u1eb7c \u00edt nghi\u00eam tr\u1ecdng h\u01a1n ch\u1ec9 v\u00ec tr\u1ea1ng th\u00e1i s\u1ea3n xu\u1ea5t \u0111\u00e3 thay \u0111\u1ed5i.<\/p>\n<p style=\"margin:0 0 16px;line-height:1.7\">\u0110\u1ec3 thu\u1eadn ti\u1ec7n cho vi\u1ec7c \u0111\u00e1nh gi\u00e1 th\u1ef1c t\u1ebf, h\u00e3y gi\u1eef m\u1ed9t ghi ch\u00fa \u0111\u1ecbnh ngh\u0129a ng\u1eafn b\u00ean c\u1ea1nh m\u1ed7i b\u1ea3n xu\u1ea5t d\u1eef li\u1ec7u. Kh\u00f4ng sao ch\u00e9p m\u1ed9t gi\u00e1 tr\u1ecb t\u1eeb m\u00e0n h\u00ecnh v\u00e0o y\u00eau c\u1ea7u b\u00e1o gi\u00e1 n\u1ebfu thi\u1ebfu m\u1eabu s\u1ed1, v\u1ecb tr\u00ed, kho\u1ea3ng th\u1eddi gian v\u00e0 tr\u1ea1ng th\u00e1i t\u1ea3i t\u01b0\u01a1ng \u1ee9ng. Nh\u1eefng th\u00f4ng tin b\u1ecb thi\u1ebfu n\u00e0y khi\u1ebfn vi\u1ec7c x\u00e1c \u0111\u1ecbnh hai b\u1ea3n ghi c\u00f3 th\u1ec3 so s\u00e1nh v\u1edbi nhau hay kh\u00f4ng tr\u1edf n\u00ean kh\u00f3 kh\u0103n.<\/p>\n<table style=\"width:100%;border-collapse:collapse\">\n<thead>\n<tr>\n<th style=\"border:1px solid #d9e1e8;padding:9px 12px;background:#f5f8fa;text-align:left\">C\u00e2u h\u1ecfi \u00f4n t\u1eadp<\/th>\n<th style=\"border:1px solid #d9e1e8;padding:9px 12px;background:#f5f8fa;text-align:left\">Th\u00f4ng tin c\u1ea7n l\u01b0u gi\u1eef<\/th>\n<th style=\"border:1px solid #d9e1e8;padding:9px 12px;background:#f5f8fa;text-align:left\">T\u1ea1i sao \u0111i\u1ec1u \u0111\u00f3 quan tr\u1ecdng<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td style=\"border:1px solid #d9e1e8;padding:9px 12px\">Ch\u1ec9 s\u1ed1 n\u00e0o \u0111ang \u0111\u01b0\u1ee3c hi\u1ec3n th\u1ecb?<\/td>\n<td style=\"border:1px solid #d9e1e8;padding:9px 12px\">Nh\u00e3n c\u00f4ng t\u01a1 v\u00e0 c\u00e0i \u0111\u1eb7t gi\u00e1 tr\u1ecb tham chi\u1ebfu d\u00f2ng \u0111i\u1ec7n<\/td>\n<td style=\"border:1px solid #d9e1e8;padding:9px 12px\">Tr\u00e1nh so s\u00e1nh c\u00e1c gi\u00e1 tr\u1ecb \u0111\u01b0\u1ee3c t\u00ednh to\u00e1n d\u1ef1a tr\u00ean nh\u1eefng c\u01a1 s\u1edf kh\u00e1c nhau nh\u01b0 th\u1ec3 ch\u00fang gi\u1ed1ng h\u1ec7t nhau.<\/td>\n<\/tr>\n<tr>\n<td style=\"border:1px solid #d9e1e8;padding:9px 12px\">Ch\u1ec9 s\u1ed1 \u0111\u01b0\u1ee3c t\u1ea1o ra trong kho\u1ea3ng th\u1eddi gian n\u00e0o?<\/td>\n<td style=\"border:1px solid #d9e1e8;padding:9px 12px\">Th\u1eddi \u0111i\u1ec3m b\u1eaft \u0111\u1ea7u, th\u1eddi l\u01b0\u1ee3ng v\u00e0 ph\u01b0\u01a1ng ph\u00e1p t\u1ed5ng h\u1ee3p d\u1eef li\u1ec7u<\/td>\n<td style=\"border:1px solid #d9e1e8;padding:9px 12px\">M\u1ed9t hi\u1ec7n t\u01b0\u1ee3ng qu\u00e1 \u0111\u1ed9 v\u00e0 m\u1ed9t kho\u1ea3ng th\u1eddi gian v\u1eadn h\u00e0nh mang t\u00ednh \u0111\u1ea1i di\u1ec7n kh\u00f4ng ph\u1ea3i l\u00e0 c\u00f9ng m\u1ed9t b\u1ea3n ghi.<\/td>\n<\/tr>\n<tr>\n<td style=\"border:1px solid #d9e1e8;padding:9px 12px\">Nh\u1eefng thi\u1ebft b\u1ecb n\u00e0o \u0111ang \u0111\u01b0\u1ee3c c\u1ea5p \u0111i\u1ec7n?<\/td>\n<td style=\"border:1px solid #d9e1e8;padding:9px 12px\">Tr\u1ea1ng th\u00e1i c\u1ee7a quy tr\u00ecnh, bi\u1ebfn t\u1ea7n VFD, t\u1ee5 \u0111i\u1ec7n v\u00e0 c\u00e1c t\u1ea3i kh\u00e1c<\/td>\n<td style=\"border:1px solid #d9e1e8;padding:9px 12px\">Th\u00e0nh ph\u1ea7n c\u1ee7a \u0111\u01b0\u1eddng d\u00e2y c\u1ea5p ngu\u1ed3n c\u00f3 th\u1ec3 \u0111\u00e3 thay \u0111\u1ed5i.<\/td>\n<\/tr>\n<tr>\n<td style=\"border:1px solid #d9e1e8;padding:9px 12px\">Quy\u1ebft \u0111\u1ecbnh c\u1ea7n \u0111\u01b0a ra l\u00e0 g\u00ec?<\/td>\n<td style=\"border:1px solid #d9e1e8;padding:9px 12px\">Ph\u1ee5c v\u1ee5 m\u1ee5c \u0111\u00edch gi\u00e1m s\u00e1t, kh\u1eafc ph\u1ee5c s\u1ef1 c\u1ed1 ho\u1eb7c y\u00eau c\u1ea7u b\u00e1o gi\u00e1 (RFQ)<\/td>\n<td style=\"border:1px solid #d9e1e8;padding:9px 12px\">Gi\u00fap tr\u00e1nh vi\u1ec7c bi\u1ebfn m\u1ed9t t\u1ef7 l\u1ec7 ph\u1ea7n tr\u0103m th\u00e0nh ch\u1ec9 d\u1eabn v\u1eadn h\u00e0nh thi\u1ebft b\u1ecb kh\u00f4ng c\u00f3 c\u0103n c\u1ee9.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p style=\"margin:0 0 16px;line-height:1.7\">H\u01b0\u1edbng d\u1eabn hi\u1ec7n c\u00f3 v\u1ec1 <a href=\"https:\/\/cnbygele.com\/vi\/blog\/power-factor-versus-harmonic-distortion-selection\/\">Quy\u1ebft \u0111\u1ecbnh v\u1ec1 h\u1ec7 s\u1ed1 c\u00f4ng su\u1ea5t v\u00e0 bi\u1ebfn d\u1ea1ng h\u00e0i<\/a> r\u1ea5t h\u1eefu \u00edch khi nh\u00f3m d\u1ef1 \u00e1n c\u1ea7n x\u00e1c \u0111\u1ecbnh m\u1ee5c ti\u00eau \u0111i\u1ec7n n\u00e0o th\u1ef1c s\u1ef1 \u0111ang \u0111\u01b0\u1ee3c xem x\u00e9t.<\/p>\n<h2 style=\"margin:42px 0 14px;scroll-margin-top:96px\" id=\"part-3-place-meters-for-the-question-being-asked\">Ph\u1ea7n 3. B\u1ed1 tr\u00ed thi\u1ebft b\u1ecb \u0111o ph\u00f9 h\u1ee3p v\u1edbi m\u1ee5c \u0111\u00edch ki\u1ec3m tra<\/h2>\n<p style=\"margin:0 0 16px;line-height:1.7\">V\u1ecb tr\u00ed l\u1eafp \u0111\u1eb7t \u0111\u1ed3ng h\u1ed3 \u0111o kh\u00f4ng ph\u1ea3i l\u00e0 m\u1ed9t chi ti\u1ebft th\u1ee7 t\u1ee5c gi\u1ea5y t\u1edd. V\u1ecb tr\u00ed n\u00e0y x\u00e1c \u0111\u1ecbnh c\u00e1c t\u1ea3i \u0111\u01b0\u1ee3c \u0111\u01b0a v\u00e0o h\u1ed3 s\u01a1 \u0111o hi\u1ec7n t\u1ea1i v\u00e0 ngu\u1ed3n \u0111i\u1ec7n \u00e1p \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 so s\u00e1nh. \u0110\u1ea7u c\u1ef1c c\u1ee7a b\u1ed9 truy\u1ec1n \u0111\u1ed9ng c\u00f3 th\u1ec3 gi\u00fap gi\u1ea3i \u0111\u00e1p m\u1ed9t v\u1ea5n \u0111\u1ec1 kh\u1eafc ph\u1ee5c s\u1ef1 c\u1ed1 t\u1ea1i ch\u1ed7, trong khi h\u1ed3 s\u01a1 t\u1ea1i \u0111\u01b0\u1eddng c\u1ea5p \u0111i\u1ec7n c\u00f3 th\u1ec3 bao g\u1ed3m nhi\u1ec1u nh\u00f3m b\u1ed9 truy\u1ec1n \u0111\u1ed9ng v\u00e0 c\u00e1c t\u1ea3i kh\u00e1c ho\u1ea1t \u0111\u1ed9ng \u0111\u1ed3ng th\u1eddi.<\/p>\n<figure style=\"margin:26px 0;text-align:center\"><img decoding=\"async\" style=\"max-width:640px;width:100%;height:auto;display:block;margin:0 auto;border-radius:8px\" src=\"https:\/\/cnbygele.com\/wp-content\/uploads\/2026\/04\/13.BY83.webp\" alt=\"H\u00ecnh \u1ea3nh m\u1eb7t sau v\u1edbi c\u00e1c k\u1ebft n\u1ed1i c\u1ee7a thi\u1ebft b\u1ecb b\u1ea3ng \u0111i\u1ec7n CNBYG, ph\u1ee5c v\u1ee5 x\u00e1c \u0111\u1ecbnh ranh gi\u1edbi \u0111o l\u01b0\u1eddng \u0111\u00e3 \u0111\u01b0\u1ee3c ghi nh\u1eadn\" \/><\/figure>\n<p style=\"margin:0 0 16px;line-height:1.7\">H\u00e3y v\u1ebd m\u1ed9t s\u01a1 \u0111\u1ed3 ranh gi\u1edbi \u0111\u01a1n gi\u1ea3n tr\u01b0\u1edbc khi b\u1eaft \u0111\u1ea7u ghi nh\u1eadn d\u1eef li\u1ec7u. \u0110\u00e1nh d\u1ea5u ngu\u1ed3n \u0111i\u1ec7n \u0111\u1ea7u v\u00e0o, c\u00e1c m\u1ea1ch \u0111i\u1ec7n \u0111\u1ea7u ra, v\u1ecb tr\u00ed \u0111\u1eb7t bi\u1ebfn d\u00f2ng (CT), \u0111i\u1ec3m l\u1ea5y \u0111i\u1ec7n \u00e1p v\u00e0 m\u1ecdi \u0111\u01b0\u1eddng d\u1eabn v\u00f2ng tr\u00e1nh ho\u1eb7c song song c\u00f3 th\u1ec3 l\u00e0m thay \u0111\u1ed5i ph\u1ea1m vi t\u1ea3i \u0111\u01b0\u1ee3c t\u00ednh \u0111\u1ebfn. N\u1ebfu nh\u00e0 m\u00e1y c\u00f3 nhi\u1ec1u ch\u1ebf \u0111\u1ed9 v\u1eadn h\u00e0nh, h\u00e3y l\u1eadp m\u1ed9t b\u1ea3n ghi ri\u00eang cho t\u1eebng ch\u1ebf \u0111\u1ed9 thay v\u00ec l\u1ea5y trung b\u00ecnh c\u00e1c \u0111i\u1ec1u ki\u1ec7n kh\u00e1c nhau th\u00e0nh m\u1ed9t gi\u00e1 tr\u1ecb chung kh\u00f4ng r\u00f5 ngu\u1ed3n g\u1ed1c.<\/p>\n<p style=\"margin:0 0 16px;line-height:1.7\">The <a href=\"https:\/\/www.nema.org\/standards\/view\/motors-and-generators\" rel=\"nofollow noopener\" target=\"_blank\">T\u1ed5ng quan v\u1ec1 NEMA MG 1<\/a> cung c\u1ea5p b\u1ed1i c\u1ea3nh v\u1ec1 h\u1ec7 th\u1ed1ng \u0111\u1ed9ng c\u01a1, nh\u01b0ng kh\u00f4ng x\u00e1c \u0111\u1ecbnh ranh gi\u1edbi \u0111o l\u01b0\u1eddng ph\u00f9 h\u1ee3p trong nh\u00e0 m\u00e1y ho\u1eb7c l\u1ef1a ch\u1ecdn thi\u1ebft b\u1ecb gi\u1ea3m thi\u1ec3u cho m\u1ed9t h\u1ec7 th\u1ed1ng l\u1eafp \u0111\u1eb7t c\u1ee5 th\u1ec3.<\/p>\n<h2 style=\"margin:42px 0 14px;scroll-margin-top:96px\" id=\"part-4-log-states-that-make-readings-comparable\">Ph\u1ea7n 4. Ghi l\u1ea1i c\u00e1c tr\u1ea1ng th\u00e1i gi\u00fap so s\u00e1nh c\u00e1c k\u1ebft qu\u1ea3 \u0111o<\/h2>\n<p style=\"margin:0 0 16px;line-height:1.7\">M\u1ed9t xu h\u01b0\u1edbng \u0111i\u1ec7n n\u1ebfu kh\u00f4ng c\u00f3 nh\u1eadt k\u00fd v\u1eadn h\u00e0nh s\u1ebd r\u1ea5t kh\u00f3 di\u1ec5n gi\u1ea3i. H\u00e3y ghi r\u00f5 tr\u1ea1ng th\u00e1i quy tr\u00ecnh, d\u00e2y chuy\u1ec1n s\u1ea3n xu\u1ea5t, t\u00ecnh tr\u1ea1ng \u0111\u01b0\u1eddng v\u00f2ng tr\u00e1nh, c\u00e1c l\u1ea7n kh\u1edfi \u0111\u1ed9ng v\u00e0 d\u1eebng m\u00e1y, c\u00f9ng nh\u1eefng t\u1ea3i l\u1edbn ho\u1ea1t \u0111\u1ed9ng \u0111\u1ed3ng th\u1eddi. M\u1ed9t b\u1ed9 d\u1eef li\u1ec7u c\u00f3 th\u1ec3 so s\u00e1nh th\u01b0\u1eddng nh\u1ecf g\u1ecdn v\u00e0 \u0111\u01b0\u1ee3c g\u1eafn nh\u00e3n r\u00f5 r\u00e0ng h\u01a1n m\u1ed9t th\u01b0 m\u1ee5c l\u1edbn ch\u1ee9a c\u00e1c \u1ea3nh ch\u1ee5p m\u00e0n h\u00ecnh kh\u00f4ng c\u00f3 ng\u00e0y th\u00e1ng.<\/p>\n<table style=\"width:100%;border-collapse:collapse\">\n<thead>\n<tr>\n<th style=\"border:1px solid #d9e1e8;padding:9px 12px;background:#f5f8fa;text-align:left\">H\u1ea1ng m\u1ee5c tr\u1ea1ng th\u00e1i v\u1eadn h\u00e0nh<\/th>\n<th style=\"border:1px solid #d9e1e8;padding:9px 12px;background:#f5f8fa;text-align:left\">Th\u00f4ng tin c\u1ea7n ghi l\u1ea1i c\u00f9ng v\u1edbi xu h\u01b0\u1edbng \u0111i\u1ec7n<\/th>\n<th style=\"border:1px solid #d9e1e8;padding:9px 12px;background:#f5f8fa;text-align:left\">Xem l\u1ea1i s\u1eed d\u1ee5ng<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td style=\"border:1px solid #d9e1e8;padding:9px 12px\">Tr\u1ea1ng th\u00e1i s\u1ea3n xu\u1ea5t<\/td>\n<td style=\"border:1px solid #d9e1e8;padding:9px 12px\">Ch\u1ebf \u0111\u1ed9 v\u1eadn h\u00e0nh, d\u1ea3i t\u1ed1c \u0111\u1ed9 v\u00e0 ca l\u00e0m vi\u1ec7c<\/td>\n<td style=\"border:1px solid #d9e1e8;padding:9px 12px\">X\u00e1c \u0111\u1ecbnh li\u1ec7u c\u00e1c b\u1ea3n ghi c\u00f3 m\u00f4 t\u1ea3 c\u00f4ng vi\u1ec7c t\u01b0\u01a1ng t\u1ef1 nhau hay kh\u00f4ng.<\/td>\n<\/tr>\n<tr>\n<td style=\"border:1px solid #d9e1e8;padding:9px 12px\">T\u1ea3i phi tuy\u1ebfn<\/td>\n<td style=\"border:1px solid #d9e1e8;padding:9px 12px\">C\u00e1c nh\u00f3m truy\u1ec1n \u0111\u1ed9ng \u0111ang ho\u1ea1t \u0111\u1ed9ng, b\u1ed9 ch\u1ec9nh l\u01b0u v\u00e0 t\u1ea3i UPS<\/td>\n<td style=\"border:1px solid #d9e1e8;padding:9px 12px\">Cho bi\u1ebft nh\u1eefng ngu\u1ed3n n\u00e0o c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c \u0111\u01b0a v\u00e0o.<\/td>\n<\/tr>\n<tr>\n<td style=\"border:1px solid #d9e1e8;padding:9px 12px\">C\u00e1c thay \u0111\u1ed5i trong qu\u00e1 tr\u00ecnh chuy\u1ec3n m\u1ea1ch<\/td>\n<td style=\"border:1px solid #d9e1e8;padding:9px 12px\">Tr\u1ea1ng th\u00e1i c\u1ee7a t\u1ee5 \u0111i\u1ec7n, \u0111\u01b0\u1eddng bypass, chuy\u1ec3n ngu\u1ed3n ho\u1eb7c b\u1ea3o tr\u00ec<\/td>\n<td style=\"border:1px solid #d9e1e8;padding:9px 12px\">Gi\u1ea3i th\u00edch nh\u1eefng thay \u0111\u1ed5i c\u00f3 th\u1ec3 kh\u00f4ng ph\u1ea3n \u00e1nh h\u00e0nh vi \u1edf tr\u1ea1ng th\u00e1i \u1ed5n \u0111\u1ecbnh.<\/td>\n<\/tr>\n<tr>\n<td style=\"border:1px solid #d9e1e8;padding:9px 12px\">T\u00ecnh tr\u1ea1ng ngu\u1ed3n c\u1ea5p<\/td>\n<td style=\"border:1px solid #d9e1e8;padding:9px 12px\">Thay \u0111\u1ed5i \u0111\u00e3 bi\u1ebft v\u1ec1 c\u1ea5u h\u00ecnh ngu\u1ed3n \u0111i\u1ec7n ho\u1eb7c \u0111\u01b0\u1eddng d\u00e2y c\u1ea5p \u0111i\u1ec7n<\/td>\n<td style=\"border:1px solid #d9e1e8;padding:9px 12px\">Gi\u00fap ph\u00e2n bi\u1ec7t c\u00e1c s\u1ef1 ki\u1ec7n t\u1eeb ph\u00eda ngu\u1ed3n c\u1ea5p v\u1edbi gi\u1ea3 thuy\u1ebft v\u1ec1 s\u1ef1 c\u1ed1 c\u1ee5c b\u1ed9.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p style=\"margin:0 0 16px;line-height:1.7\">\u0110\u1ec3 x\u00e2y d\u1ef1ng c\u01a1 s\u1edf \u0111\u00e1nh gi\u00e1 s\u1eb5n s\u00e0ng cho y\u00eau c\u1ea7u b\u00e1o gi\u00e1 (RFQ), h\u00e3y s\u1eed d\u1ee5ng <a href=\"https:\/\/cnbygele.com\/vi\/blog\/power-quality-metering-before-apf-svg-rfq\/\">c\u00f4ng t\u00e1c \u0111o l\u01b0\u1eddng tr\u01b0\u1edbc khi g\u1eedi y\u00eau c\u1ea7u b\u00e1o gi\u00e1 (RFQ)<\/a> nh\u01b0 m\u1ed9t danh s\u00e1ch ki\u1ec3m tra b\u1ed5 tr\u1ee3. \u0110\u00e2y l\u00e0 t\u00e0i li\u1ec7u h\u1ed7 tr\u1ee3 l\u1eadp k\u1ebf ho\u1ea1ch, kh\u00f4ng ph\u1ea3i ch\u1ee9ng nh\u1eadn tu\u00e2n th\u1ee7.<\/p>\n<h2 style=\"margin:42px 0 14px;scroll-margin-top:96px\" id=\"part-5-separate-index-review-from-equipment-selection\">Ph\u1ea7n 5. T\u00e1ch bi\u1ec7t vi\u1ec7c \u0111\u00e1nh gi\u00e1 ch\u1ec9 s\u1ed1 kh\u1ecfi vi\u1ec7c l\u1ef1a ch\u1ecdn thi\u1ebft b\u1ecb<\/h2>\n<p style=\"margin:0 0 16px;line-height:1.7\">H\u00e3y xem x\u00e9t vi\u1ec7c \u0111\u00e1nh gi\u00e1 ch\u1ec9 s\u1ed1 nh\u01b0 m\u1ed9t b\u01b0\u1edbc x\u00e1c \u0111\u1ecbnh ph\u1ea1m vi c\u00f4ng vi\u1ec7c, thay v\u00ec h\u01b0\u1edbng d\u1eabn s\u1eed d\u1ee5ng thi\u1ebft b\u1ecb. Tr\u01b0\u1edbc khi th\u1ea3o lu\u1eadn v\u1ec1 ph\u01b0\u01a1ng \u00e1n AHF\/APF, c\u1ea7n x\u00e1c \u0111\u1ecbnh m\u1ee5c ti\u00eau d\u00f2ng \u0111i\u1ec7n h\u00e0i, \u0111i\u1ec3m \u0111\u1ea5u n\u1ed1i, c\u00e1ch b\u1ed1 tr\u00ed CT, b\u1ea3n ghi t\u1ea3i \u0111\u1ea1i di\u1ec7n, ph\u1ed1i h\u1ee3p b\u1ea3o v\u1ec7, gi\u1edbi h\u1ea1n l\u1eafp \u0111\u1eb7t v\u00e0 ph\u01b0\u01a1ng ph\u00e1p nghi\u1ec7m thu.<\/p>\n<p style=\"margin:0 0 16px;line-height:1.7\">The <a href=\"https:\/\/cnbygele.com\/vi\/product\/ahf-active-harmonic-filter-harmonic-control\/\">B\u1ed9 l\u1ecdc s\u00f3ng h\u00e0i t\u00edch c\u1ef1c AHF<\/a> trang n\u00e0y l\u00e0 \u0111i\u1ec3m kh\u1edfi \u0111\u1ea7u \u0111\u1ec3 t\u00ecm hi\u1ec3u d\u00f2ng s\u1ea3n ph\u1ea9m d\u00e0nh cho m\u1ed9t ph\u1ea1m vi c\u00f4ng vi\u1ec7c c\u1ee5 th\u1ec3 li\u00ean quan \u0111\u1ebfn d\u00f2ng \u0111i\u1ec7n h\u00e0i. Trang n\u00e0y kh\u00f4ng cam k\u1ebft \u0111\u1ea1t \u0111\u01b0\u1ee3c m\u1ed9t t\u1ef7 l\u1ec7 ph\u1ea7n tr\u0103m, gi\u1edbi h\u1ea1n nh\u00e0 m\u00e1y hay k\u1ebft qu\u1ea3 v\u1eadn h\u00e0nh c\u1ee5 th\u1ec3 n\u00e0o.<\/p>\n<figure style=\"margin:26px 0;text-align:center\"><img decoding=\"async\" style=\"max-width:640px;width:100%;height:auto;display:block;margin:0 auto;border-radius:8px\" src=\"https:\/\/cnbygele.com\/wp-content\/uploads\/2026\/04\/11.JKW5C.webp\" alt=\"B\u1ed9 \u0111i\u1ec1u khi\u1ec3n CNBYG \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng l\u00e0m th\u00f4ng tin tham chi\u1ebfu s\u1ea3n ph\u1ea9m sau khi ho\u00e0n t\u1ea5t \u0111\u00e1nh gi\u00e1 \u0111o l\u01b0\u1eddng v\u1edbi ph\u1ea1m vi x\u00e1c \u0111\u1ecbnh\" \/><\/figure>\n<p style=\"margin:0 0 16px;line-height:1.7\">Ranh gi\u1edbi ph\u1ea1m vi ph\u00f9 h\u1ee3p n\u00e0y r\u1ea5t quan tr\u1ecdng. S\u1ef1 c\u1ed1 \u0111i\u1ec7n \u00e1p, m\u1ee5c ti\u00eau ch\u1ec9 li\u00ean quan \u0111\u1ebfn c\u00f4ng su\u1ea5t ph\u1ea3n kh\u00e1ng, v\u1ea5n \u0111\u1ec1 b\u1ea3o v\u1ec7 ho\u1eb7c b\u1ea3n ghi kh\u00f4ng x\u00e1c \u0111\u1ecbnh r\u00f5 ranh gi\u1edbi \u0111i\u1ec7n c\u00f3 th\u1ec3 \u0111\u00f2i h\u1ecfi m\u1ed9t ph\u01b0\u01a1ng \u00e1n kh\u1ea3o s\u00e1t kh\u00e1c. B\u1ed1i c\u1ea3nh \u0111\u00e1nh gi\u00e1 <a href=\"https:\/\/cnbygele.com\/vi\/blog\/ieee-519-harmonic-limits-apf-sizing\/\">theo ti\u00eau chu\u1ea9n IEEE 519<\/a> c\u1ea7n \u0111\u01b0\u1ee3c xem x\u00e9t d\u1ef1a tr\u00ean tr\u00e1ch nhi\u1ec7m c\u1ee5 th\u1ec3 c\u1ee7a t\u1eebng d\u1ef1 \u00e1n, thay v\u00ec s\u1eed d\u1ee5ng nh\u01b0 m\u1ed9t c\u00e1ch x\u00e1c \u0111\u1ecbnh nhanh k\u00edch th\u01b0\u1edbc thi\u1ebft b\u1ecb chung chung.<\/p>\n<h2 style=\"margin:42px 0 14px;scroll-margin-top:96px\" id=\"part-6-send-a-reviewable-measurement-package\">Ph\u1ea7n 6. G\u1eedi b\u1ed9 d\u1eef li\u1ec7u \u0111o l\u01b0\u1eddng c\u00f3 th\u1ec3 ki\u1ec3m tra v\u00e0 \u0111\u1ed1i chi\u1ebfu<\/h2>\n<p style=\"margin:0 0 16px;line-height:1.7\">M\u1ed9t y\u00eau c\u1ea7u r\u00f5 r\u00e0ng gi\u00fap nh\u00e0 cung c\u1ea5p ho\u1eb7c \u0111\u1ed9i ng\u0169 k\u1ef9 thu\u1eadt hi\u1ec3u \u0111\u01b0\u1ee3c \u00fd ngh\u0129a c\u1ee7a c\u00e1c con s\u1ed1. H\u00e3y g\u1eedi m\u1ed9t b\u1ed9 h\u1ed3 s\u01a1 d\u1eef li\u1ec7u ng\u1eafn g\u1ecdn thay v\u00ec ch\u1ec9 cung c\u1ea5p m\u1ed9t t\u1ef7 l\u1ec7 ph\u1ea7n tr\u0103m duy nh\u1ea5t tr\u00ean m\u00e0n h\u00ecnh.<\/p>\n<table style=\"width:100%;border-collapse:collapse\">\n<thead>\n<tr>\n<th style=\"border:1px solid #d9e1e8;padding:9px 12px;background:#f5f8fa;text-align:left\">Ng\u01b0\u1eddi mua ph\u1ea3i cung c\u1ea5p<\/th>\n<th style=\"border:1px solid #d9e1e8;padding:9px 12px;background:#f5f8fa;text-align:left\">T\u1ea1i sao \u0111i\u1ec1u \u0111\u00f3 quan tr\u1ecdng<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td style=\"border:1px solid #d9e1e8;padding:9px 12px\">S\u01a1 \u0111\u1ed3 m\u1ed9t s\u1ee3i v\u00e0 c\u00e1c th\u00f4ng s\u1ed1 danh \u0111\u1ecbnh c\u1ee7a h\u1ec7 th\u1ed1ng<\/td>\n<td style=\"border:1px solid #d9e1e8;padding:9px 12px\">X\u00e2y d\u1ef1ng ranh gi\u1edbi \u0111i\u1ec7n v\u00e0 b\u1ed1i c\u1ea3nh cung c\u1ea5p.<\/td>\n<\/tr>\n<tr>\n<td style=\"border:1px solid #d9e1e8;padding:9px 12px\">V\u1ecb tr\u00ed \u0111\u1ed3ng h\u1ed3 \u0111o, bi\u1ebfn d\u00f2ng (CT) v\u00e0 \u0111i\u1ec7n \u00e1p chu\u1ea9n<\/td>\n<td style=\"border:1px solid #d9e1e8;padding:9px 12px\">Gi\u00fap ng\u01b0\u1eddi \u0111\u00e1nh gi\u00e1 x\u00e1c \u0111\u1ecbnh ch\u00ednh x\u00e1c v\u1ecb tr\u00ed \u0111o th\u1ef1c t\u1ebf.<\/td>\n<\/tr>\n<tr>\n<td style=\"border:1px solid #d9e1e8;padding:9px 12px\">D\u1eef li\u1ec7u xu\u1ea5t THD\/TDD k\u00e8m theo th\u00f4ng tin v\u1ec1 d\u00f2ng \u0111i\u1ec7n tham chi\u1ebfu \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng.<\/td>\n<td style=\"border:1px solid #d9e1e8;padding:9px 12px\">\u0110\u1ea3m b\u1ea3o duy tr\u00ec c\u01a1 s\u1edf t\u00ednh to\u00e1n.<\/td>\n<\/tr>\n<tr>\n<td style=\"border:1px solid #d9e1e8;padding:9px 12px\">Nh\u1eadt k\u00fd tr\u1ea1ng th\u00e1i v\u1eadn h\u00e0nh v\u00e0 danh m\u1ee5c t\u1ea3i.<\/td>\n<td style=\"border:1px solid #d9e1e8;padding:9px 12px\">Li\u00ean k\u1ebft c\u00e1c xu h\u01b0\u1edbng v\u1edbi nh\u1eefng t\u1ea3i \u0111ang ho\u1ea1t \u0111\u1ed9ng t\u1ea1i th\u1eddi \u0111i\u1ec3m \u0111\u00f3.<\/td>\n<\/tr>\n<tr>\n<td style=\"border:1px solid #d9e1e8;padding:9px 12px\">Th\u00f4ng tin chi ti\u1ebft v\u1ec1 c\u00e1c bi\u1ec7n ph\u00e1p gi\u1ea3m thi\u1ec3u v\u00e0 b\u1ea3o v\u1ec7 hi\u1ec7n c\u00f3.<\/td>\n<td style=\"border:1px solid #d9e1e8;padding:9px 12px\">X\u00e1c \u0111\u1ecbnh c\u00e1c r\u00e0ng bu\u1ed9c t\u00edch h\u1ee3p.<\/td>\n<\/tr>\n<tr>\n<td style=\"border:1px solid #d9e1e8;padding:9px 12px\">C\u00e1c y\u00eau c\u1ea7u v\u1ec1 kh\u00f4ng gian, l\u00e0m m\u00e1t, c\u00e1p \u0111i\u1ec7n, truy\u1ec1n th\u00f4ng v\u00e0 nghi\u1ec7m thu.<\/td>\n<td style=\"border:1px solid #d9e1e8;padding:9px 12px\">\u0110\u00e1nh gi\u00e1 t\u00ednh kh\u1ea3 thi c\u1ee7a ph\u1ea1m vi gi\u1ea3i ph\u00e1p \u0111\u00e3 x\u00e1c \u0111\u1ecbnh.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p style=\"margin:0 0 16px;line-height:1.7\">CNBYG c\u00f3 th\u1ec3 th\u1ea3o lu\u1eadn v\u1ec1 m\u1ee9c \u0111\u1ed9 ph\u00f9 h\u1ee3p c\u1ee7a d\u00f2ng s\u1ea3n ph\u1ea9m khi m\u1ee5c ti\u00eau v\u1ec1 d\u00f2ng \u0111i\u1ec7n h\u00e0i v\u00e0 ph\u1ea1m vi gi\u1edbi h\u1ea1n c\u1ee7a nh\u00e0 m\u00e1y \u0111\u00e3 \u0111\u01b0\u1ee3c x\u00e1c \u0111\u1ecbnh. H\u00e3y s\u1eed d\u1ee5ng <a href=\"https:\/\/cnbygele.com\/vi\/contact-us\/\">b\u1ed9 d\u1eef li\u1ec7u \u0111o l\u01b0\u1eddng<\/a> \u0111\u1ec3 b\u1eaft \u0111\u1ea7u cu\u1ed9c th\u1ea3o lu\u1eadn \u0111\u00f3; m\u1ed9t b\u00e0i vi\u1ebft t\u1ed5ng quan kh\u00f4ng th\u1ec3 thay th\u1ebf nghi\u00ean c\u1ee9u t\u1ea1i nh\u00e0 m\u00e1y ho\u1eb7c \u0111\u1ea3m b\u1ea3o k\u1ebft qu\u1ea3 \u0111i\u1ec7n c\u1ee5 th\u1ec3.<\/p>\n<h2 style=\"margin:42px 0 14px;scroll-margin-top:96px\" id=\"frequently-asked-questions\">C\u00e1c c\u00e2u h\u1ecfi th\u01b0\u1eddng g\u1eb7p<\/h2>\n<h3 style=\"margin:28px 0 12px\">THD c\u00f3 gi\u1ed1ng TDD kh\u00f4ng?<\/h3>\n<p style=\"margin:0 0 16px;line-height:1.7\">Kh\u00f4ng. C\u1ea3 hai ch\u1ec9 s\u1ed1 \u0111\u1ec1u c\u1ea7n \u0111\u01b0\u1ee3c tr\u00ecnh b\u00e0y k\u00e8m theo d\u00f2ng \u0111i\u1ec7n tham chi\u1ebfu \u0111\u01b0\u1ee3c b\u00e1o c\u00e1o, v\u1ecb tr\u00ed \u0111o v\u00e0 \u0111i\u1ec1u ki\u1ec7n v\u1eadn h\u00e0nh. Kh\u00f4ng n\u00ean so s\u00e1nh c\u00e1c t\u1ef7 l\u1ec7 ph\u1ea7n tr\u0103m \u0111\u01b0\u1ee3c t\u00ednh tr\u00ean nh\u1eefng c\u01a1 s\u1edf kh\u00e1c nhau nh\u01b0 th\u1ec3 ch\u00fang m\u00f4 t\u1ea3 c\u00f9ng m\u1ed9t d\u1eef li\u1ec7u \u0111o l\u01b0\u1eddng.<\/p>\n<h3 style=\"margin:28px 0 12px\">N\u00ean \u0111o \u0111\u1ed9 m\u00e9o d\u00f2ng \u0111i\u1ec7n c\u1ee7a nh\u00e0 m\u00e1y \u1edf \u0111\u00e2u?<\/h3>\n<p style=\"margin:0 0 16px;line-height:1.7\">H\u00e3y \u0111o t\u1ea1i v\u1ecb tr\u00ed \u0111i\u1ec7n ph\u00f9 h\u1ee3p v\u1edbi quy\u1ebft \u0111\u1ecbnh c\u1ea7n \u0111\u01b0a ra v\u00e0 th\u1ec3 hi\u1ec7n r\u00f5 v\u1ecb tr\u00ed \u0111\u00f3 tr\u00ean s\u01a1 \u0111\u1ed3 \u0111\u01a1n tuy\u1ebfn. \u0110\u1ea7u v\u00e0o c\u1ee7a bi\u1ebfn t\u1ea7n v\u00e0 \u0111\u01b0\u1eddng d\u00e2y c\u1ea5p \u0111i\u1ec7n chung l\u00e0 hai ph\u1ea1m vi \u0111o kh\u00e1c nhau.<\/p>\n<h3 style=\"margin:28px 0 12px\">S\u1ed1 li\u1ec7u \u0111o t\u1ea1i \u0111\u1ea7u v\u00e0o bi\u1ebfn t\u1ea7n VFD c\u00f3 th\u1ec3 \u0111\u1ea1i di\u1ec7n cho \u0111\u01b0\u1eddng d\u00e2y c\u1ea5p \u0111i\u1ec7n c\u1ee7a nh\u00e0 m\u00e1y kh\u00f4ng?<\/h3>\n<p style=\"margin:0 0 16px;line-height:1.7\">Kh\u00f4ng ph\u1ea3i l\u00fac n\u00e0o c\u0169ng v\u1eady. D\u1eef li\u1ec7u \u0111o t\u1ea1i \u0111\u1ea7u v\u00e0o VFD ch\u1ec9 ph\u1ea3n \u00e1nh v\u1ecb tr\u00ed c\u1ee5c b\u1ed9 \u0111\u00f3, trong khi \u0111\u01b0\u1eddng d\u00e2y c\u1ea5p \u0111i\u1ec7n c\u00f3 th\u1ec3 bao g\u1ed3m nhi\u1ec1u t\u1ea3i \u0111\u01b0\u1ee3c k\u1ebft n\u1ed1i v\u00e0 c\u00e1c ph\u01b0\u01a1ng \u00e1n c\u1ea5p \u0111i\u1ec7n kh\u00e1c nhau.<\/p>\n<h3 style=\"margin:28px 0 12px\">T\u1ea1i sao c\u1ea7n ghi l\u1ea1i tr\u1ea1ng th\u00e1i v\u1eadn h\u00e0nh?<\/h3>\n<p style=\"margin:0 0 16px;line-height:1.7\">C\u01a1 c\u1ea5u t\u1ea3i c\u00f3 th\u1ec3 thay \u0111\u1ed5i theo ca l\u00e0m vi\u1ec7c, s\u1ea3n ph\u1ea9m, t\u1ed1c \u0111\u1ed9, tr\u1ea1ng th\u00e1i \u0111\u00f3ng c\u1eaft ho\u1eb7c t\u00ecnh tr\u1ea1ng b\u1ea3o tr\u00ec. Nh\u1eadt k\u00fd v\u1eadn h\u00e0nh gi\u00fap so s\u00e1nh hai b\u1ea3n ghi \u0111o l\u01b0\u1eddng \u0111i\u1ec7n m\u1ed9t c\u00e1ch nh\u1ea5t qu\u00e1n.<\/p>\n<h3 style=\"margin:28px 0 12px\">IEEE 519 c\u00f3 quy \u0111\u1ecbnh l\u1ef1a ch\u1ecdn k\u00edch th\u01b0\u1edbc thi\u1ebft b\u1ecb kh\u00f4ng?<\/h3>\n<p style=\"margin:0 0 16px;line-height:1.7\">Kh\u00f4ng. Ti\u00eau chu\u1ea9n n\u00e0y cung c\u1ea5p c\u01a1 s\u1edf tham chi\u1ebfu v\u1ec1 ki\u1ec3m so\u00e1t s\u00f3ng h\u00e0i, trong khi m\u1ed7i d\u1ef1 \u00e1n v\u1eabn c\u1ea7n x\u00e1c \u0111\u1ecbnh ranh gi\u1edbi ri\u00eang, b\u1eb1ng ch\u1ee9ng \u0111o l\u01b0\u1eddng, ph\u1ea1m vi t\u00edch h\u1ee3p v\u00e0 ti\u00eau ch\u00ed nghi\u1ec7m thu.<\/p>\n<h3 style=\"margin:28px 0 12px\">Nh\u1eefng n\u1ed9i dung n\u00e0o c\u1ea7n c\u00f3 trong y\u00eau c\u1ea7u b\u00e1o gi\u00e1 (RFQ) d\u1ef1a tr\u00ean k\u1ebft qu\u1ea3 \u0111o l\u01b0\u1eddng?<\/h3>\n<p style=\"margin:0 0 16px;line-height:1.7\">H\u00e3y cung c\u1ea5p s\u01a1 \u0111\u1ed3 \u0111\u01a1n tuy\u1ebfn, th\u00f4ng s\u1ed1 danh \u0111\u1ecbnh, v\u1ecb tr\u00ed \u0111\u1ed3ng h\u1ed3 \u0111o v\u00e0 bi\u1ebfn d\u00f2ng (CT), gi\u00e1 tr\u1ecb d\u00f2ng \u0111i\u1ec7n tham chi\u1ebfu \u0111\u00e3 x\u00e1c \u0111\u1ecbnh, c\u00e1c d\u1eef li\u1ec7u xu\u1ea5t \u0111o l\u01b0\u1eddng ti\u00eau bi\u1ec3u, nh\u1eadt k\u00fd v\u1eadn h\u00e0nh, danh m\u1ee5c t\u1ea3i, thi\u1ebft b\u1ecb hi\u1ec7n c\u00f3 v\u00e0 c\u00e1c r\u00e0ng bu\u1ed9c v\u1ec1 l\u1eafp \u0111\u1eb7t.<\/p>\n<h2 style=\"margin:42px 0 14px;scroll-margin-top:96px\" id=\"references\">T\u00e0i li\u1ec7u tham kh\u1ea3o<\/h2>\n<ul style=\"margin:0 0 18px 1.2em;line-height:1.7\">\n<li style=\"margin:0 0 8px\"><a href=\"https:\/\/standards.ieee.org\/ieee\/519\/5892\/\" rel=\"nofollow noopener\" target=\"_blank\">T\u1ed5ng quan v\u1ec1 IEEE 519 ph\u1ee5c v\u1ee5 \u0111\u00e1nh gi\u00e1 ki\u1ec3m so\u00e1t s\u00f3ng h\u00e0i<\/a><\/li>\n<li style=\"margin:0 0 8px\"><a href=\"https:\/\/www.nema.org\/standards\/view\/motors-and-generators\" rel=\"nofollow noopener\" target=\"_blank\">\u1ea4n ph\u1ea9m NEMA MG 1 cung c\u1ea5p b\u1ed1i c\u1ea3nh tham chi\u1ebfu cho h\u1ec7 th\u1ed1ng \u0111\u1ed9ng c\u01a1<\/a><\/li>\n<li style=\"margin:0 0 8px\"><a href=\"https:\/\/www.energy.gov\/cmei\/ito\/industrial-technologies-office\" rel=\"nofollow noopener\" target=\"_blank\">C\u00e1c t\u00e0i li\u1ec7u t\u1eeb V\u0103n ph\u00f2ng C\u00f4ng ngh\u1ec7 C\u00f4ng nghi\u1ec7p thu\u1ed9c B\u1ed9 N\u0103ng l\u01b0\u1ee3ng (DOE)<\/a><\/li>\n<\/ul>\n<\/div>","protected":false},"excerpt":{"rendered":"<p>THD and TDD become useful engineering records only when the electrical location, current reference, and operating state are retained with the value. A local VFD input, a process feeder, and a common coupling boundary are not interchangeable measurement points, even when a meter displays the same type of percentage. Start with the power quality system [&hellip;]<\/p>\n","protected":false},"author":3,"featured_media":1620,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"_gspb_post_css":"","footnotes":""},"categories":[1],"tags":[],"class_list":["post-2359","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog"],"blocksy_meta":{"styles_descriptor":{"styles":{"desktop":"","tablet":"","mobile":""},"google_fonts":[],"version":8}},"acf":[],"amp_enabled":true,"_links":{"self":[{"href":"https:\/\/cnbygele.com\/vi\/wp-json\/wp\/v2\/posts\/2359","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/cnbygele.com\/vi\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/cnbygele.com\/vi\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/cnbygele.com\/vi\/wp-json\/wp\/v2\/users\/3"}],"replies":[{"embeddable":true,"href":"https:\/\/cnbygele.com\/vi\/wp-json\/wp\/v2\/comments?post=2359"}],"version-history":[{"count":1,"href":"https:\/\/cnbygele.com\/vi\/wp-json\/wp\/v2\/posts\/2359\/revisions"}],"predecessor-version":[{"id":2510,"href":"https:\/\/cnbygele.com\/vi\/wp-json\/wp\/v2\/posts\/2359\/revisions\/2510"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/cnbygele.com\/vi\/wp-json\/wp\/v2\/media\/1620"}],"wp:attachment":[{"href":"https:\/\/cnbygele.com\/vi\/wp-json\/wp\/v2\/media?parent=2359"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/cnbygele.com\/vi\/wp-json\/wp\/v2\/categories?post=2359"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/cnbygele.com\/vi\/wp-json\/wp\/v2\/tags?post=2359"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}