{"id":2582,"date":"2026-07-25T15:00:00","date_gmt":"2026-07-25T07:00:00","guid":{"rendered":"https:\/\/cnbygele.com\/?p=2582"},"modified":"2026-08-24T18:09:19","modified_gmt":"2026-08-24T10:09:19","slug":"active-harmonic-filter-ct-placement-wiring","status":"publish","type":"post","link":"https:\/\/cnbygele.com\/vi\/blog\/active-harmonic-filter-ct-placement-wiring\/","title":{"rendered":"Active Harmonic Filter CT Placement and Wiring Guide"},"content":{"rendered":"<div class=\"b2b-article\">\n<p style=\"margin:0 0 16px;line-height:1.7\"><strong>Ct location, polarity, wiring, and commissioning evidence for apf integration should begin with a documented electrical boundary, representative operating record, and a defined decision.<\/strong> M\u1ed9t ch\u1ec9 s\u1ed1 \u0111\u1ed3ng h\u1ed3 \u0111o, m\u1ed9t b\u1ea3ng t\u00ean linh ki\u1ec7n, ho\u1eb7c m\u1ed9t thao t\u00e1c \u0111\u00f3ng c\u1eaft \u0111\u01a1n l\u1ebb t\u1ef1 b\u1ea3n th\u00e2n n\u00f3 ch\u01b0a th\u1ec3 x\u00e1c \u0111\u1ecbnh \u0111\u01b0\u1ee3c nguy\u00ean nh\u00e2n, thi\u1ebft b\u1ecb c\u1ea7n thi\u1ebft, ho\u1eb7c ti\u00eau ch\u00ed nghi\u1ec7m thu.<\/p>\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-build-an-operating-record-before-changing-equipment\">Ph\u1ea7n 2. L\u1eadp h\u1ed3 s\u01a1 v\u1eadn h\u00e0nh tr\u01b0\u1edbc khi thay \u0111\u1ed5i thi\u1ebft b\u1ecb<\/a><\/li>\n<li style=\"margin:0 0 8px\"><a href=\"#part-3-separate-standards-context-from-a-device-decision\">Ph\u1ea7n 3. T\u00e1ch bi\u1ec7t ng\u1eef c\u1ea3nh ti\u00eau chu\u1ea9n kh\u1ecfi quy\u1ebft \u0111\u1ecbnh thi\u1ebft b\u1ecb<\/a><\/li>\n<li style=\"margin:0 0 8px\"><a href=\"#part-4-compare-integration-paths-without-defaulting-to-a-product\">Ph\u1ea7n 4. So s\u00e1nh c\u00e1c l\u1ed9 tr\u00ecnh t\u00edch h\u1ee3p m\u00e0 kh\u00f4ng m\u1eb7c \u0111\u1ecbnh ch\u1ecdn m\u1ed9t s\u1ea3n ph\u1ea9m<\/a><\/li>\n<li style=\"margin:0 0 8px\"><a href=\"#part-5-prepare-the-rfq-and-commissioning-record\">Ph\u1ea7n 5. Chu\u1ea9n b\u1ecb RFQ v\u00e0 bi\u00ean b\u1ea3n ch\u1ea1y th\u1eed<\/a><\/li>\n<li style=\"margin:0 0 8px\"><a href=\"#part-6-apply-the-fit-boundary-before-requesting-equipment\">Ph\u1ea7n 6. \u00c1p d\u1ee5ng gi\u1edbi h\u1ea1n ph\u00f9 h\u1ee3p tr\u01b0\u1edbc khi y\u00eau c\u1ea7u thi\u1ebft b\u1ecb<\/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\">Ct location, polarity, wiring, and commissioning evidence for apf integration should begin with a documented electrical boundary, representative operating record, and a defined decision. A meter reading, a component nameplate, or a single switching event does not by itself establish the cause, the required equipment, or the acceptance criteria.<\/p>\n<p style=\"margin:0 0 16px;line-height:1.7\">CNBYG can discuss AHF Active Harmonic Filter product-line context when the recorded evidence supports a defined objective. It cannot establish This is an installation and signal-integrity guide, not APF capacity sizing, a protection-study substitute, or a guarantee of post-installation performance. from an article. For broader navigation, see <a href=\"https:\/\/cnbygele.com\/vi\/power-quality-system-guides\/\">H\u01b0\u1edbng d\u1eabn H\u1ec7 th\u1ed1ng Ch\u1ea5t l\u01b0\u1ee3ng \u0110i\u1ec7n<\/a>.<\/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\">An active harmonic filter can only respond to the current reference presented by its CT circuit. CT placement and wiring therefore begin with the compensation boundary: identify the monitored feeder or bus, current direction, polarity convention, phase correspondence, routing, protection, and the commissioning test that will prove the signal.<\/p>\n<p style=\"margin:0 0 16px;line-height:1.7\">At the APF reference CT location and the compensated bus or feeder, a local measurement and a system-boundary result are not interchangeable. The record should state meter location, voltage reference, CT orientation, ratio, time aggregation, operating state, and concurrent loads. Without those details, a reading can be useful for troubleshooting but unsuitable for a procurement or acceptance decision.<\/p>\n<p style=\"margin:0 0 16px;line-height:1.7\">CNBYG can discuss its AHF Active Harmonic Filter product line when the project objective is defined. It cannot establish This is an installation and signal-integrity guide, not APF capacity sizing, a protection-study substitute, or a guarantee of post-installation performance. from an article, a photograph, or a nameplate. The <a href=\"https:\/\/cnbygele.com\/vi\/power-quality-system-guides\/\">H\u01b0\u1edbng d\u1eabn H\u1ec7 th\u1ed1ng Ch\u1ea5t l\u01b0\u1ee3ng \u0110i\u1ec7n<\/a> cung c\u1ea5p \u0111i\u1ec1u h\u01b0\u1edbng b\u00ean th\u1ee9 nh\u1ea5t r\u1ed9ng h\u01a1n cho m\u1ed9t \u0111\u00e1nh gi\u00e1 h\u01b0\u1edbng d\u1eabn b\u1edfi \u0111o l\u01b0\u1eddng.<\/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\/07\/static-var-compensation-system-design-basics-cover-1.webp\" alt=\"CNBYG power quality planning context for apf ct placement wiring\" \/><\/figure>\n<h2 style=\"margin:42px 0 14px;scroll-margin-top:96px\" id=\"part-2-build-an-operating-record-before-changing-equipment\">Ph\u1ea7n 2. L\u1eadp h\u1ed3 s\u01a1 v\u1eadn h\u00e0nh tr\u01b0\u1edbc khi thay \u0111\u1ed5i thi\u1ebft b\u1ecb<\/h2>\n<p style=\"margin:0 0 16px;line-height:1.7\">For this topic, the log should cover normal load, reduced load, APF enabled and disabled states, bypass or maintenance states, and representative nonlinear-load events. Keep marked CT drawings with phase labels, ratio, polarity marks, terminal numbers, and the APF configuration used for each commissioning capture. A representative record also identifies major nonlinear loads, existing capacitors, reactors, filters, transformer configuration, protective devices, and any operational change that coincides with the observed condition.<\/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 \u0111o l\u01b0\u1eddng<\/th>\n<th style=\"border:1px solid #d9e1e8;padding:9px 12px;background:#f5f8fa;text-align:left\">\u0110\u1ea7u v\u00e0o d\u1ef1 \u00e1n<\/th>\n<th style=\"border:1px solid #d9e1e8;padding:9px 12px;background:#f5f8fa;text-align:left\">Quy\u1ebft \u0111\u1ecbnh \u0111\u01b0\u1ee3c h\u1ed7 tr\u1ee3<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td style=\"border:1px solid #d9e1e8;padding:9px 12px\">\u0110i\u1ec1u g\u00ec x\u1ea3y ra t\u1ea1i \u0111i\u1ec3m k\u1ebft n\u1ed1i c\u1ee5c b\u1ed9?<\/td>\n<td style=\"border:1px solid #d9e1e8;padding:9px 12px\">Xu h\u01b0\u1edbng d\u00f2ng \u0111i\u1ec7n v\u00e0 \u0111i\u1ec7n \u00e1p, ph\u1ed5, v\u1ecb tr\u00ed CT, tr\u1ea1ng th\u00e1i t\u1ea3i<\/td>\n<td style=\"border:1px solid #d9e1e8;padding:9px 12px\">\u0110\u1eb7c t\u00ednh ngu\u1ed3n v\u00e0 \u0111\u00e1nh gi\u00e1 l\u1eafp \u0111\u1eb7t<\/td>\n<\/tr>\n<tr>\n<td style=\"border:1px solid #d9e1e8;padding:9px 12px\">\u0110i\u1ec1u g\u00ec x\u1ea3y ra t\u1ea1i ranh gi\u1edbi d\u1ef1 \u00e1n?<\/td>\n<td style=\"border:1px solid #d9e1e8;padding:9px 12px\">D\u1eef li\u1ec7u thanh c\u00e1i, th\u00f4ng tin m\u00e1y bi\u1ebfn \u00e1p v\u00e0 ngu\u1ed3n ph\u00eda tr\u00ean, xu h\u01b0\u1edbng nhu c\u1ea7u<\/td>\n<td style=\"border:1px solid #d9e1e8;padding:9px 12px\">\u0110\u1ecbnh ngh\u0129a m\u1ee5c ti\u00eau c\u1ea5p h\u1ec7 th\u1ed1ng<\/td>\n<\/tr>\n<tr>\n<td style=\"border:1px solid #d9e1e8;padding:9px 12px\">T\u00ecnh tr\u1ea1ng n\u00e0y c\u00f3 l\u1eb7p l\u1ea1i kh\u00f4ng?<\/td>\n<td style=\"border:1px solid #d9e1e8;padding:9px 12px\">Nh\u1eadt k\u00fd v\u1eadn h\u00e0nh c\u00f3 \u0111\u00f3ng d\u1ea5u th\u1eddi gian qua c\u00e1c tr\u1ea1ng th\u00e1i \u0111\u1ea1i di\u1ec7n<\/td>\n<td style=\"border:1px solid #d9e1e8;padding:9px 12px\">So s\u00e1nh ph\u1ea1m vi y\u00eau c\u1ea7u b\u00e1o gi\u00e1 (RFQ) v\u00e0 c\u00f4ng t\u00e1c v\u1eadn h\u00e0nh th\u1eed<\/td>\n<\/tr>\n<tr>\n<td style=\"border:1px solid #d9e1e8;padding:9px 12px\">C\u00e1i g\u00ec \u0111\u00e3 \u0111\u01b0\u1ee3c k\u1ebft n\u1ed1i?<\/td>\n<td style=\"border:1px solid #d9e1e8;padding:9px 12px\">S\u01a1 \u0111\u1ed3 m\u1ed9t s\u1ee3i, ki\u1ec3m k\u00ea thi\u1ebft b\u1ecb, d\u1eef li\u1ec7u \u0111\u00f3ng c\u1eaft ho\u1eb7c \u0111i\u1ec1u khi\u1ec3n<\/td>\n<td style=\"border:1px solid #d9e1e8;padding:9px 12px\">\u0110\u00e1nh gi\u00e1 t\u01b0\u01a1ng t\u00e1c v\u00e0 h\u1ed9i nh\u1eadp<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p style=\"margin:0 0 16px;line-height:1.7\">Tr\u00e1nh thu th\u1eadp m\u1ed9t b\u1ee9c \u1ea3nh ch\u1ee5p nhanh thu\u1eadn l\u1ee3i duy nh\u1ea5t v\u00e0 coi \u0111\u00f3 l\u00e0 c\u01a1 s\u1edf thi\u1ebft k\u1ebf. M\u1ed9t l\u1ea7n v\u1eadn h\u00e0nh \u1edf m\u1ee9c c\u00f4ng su\u1ea5t th\u1ea5p, tr\u1ea1ng th\u00e1i b\u1ea3o tr\u00ec ho\u1eb7c t\u1ea3i \u0111\u1ed9c l\u1eadp c\u00f3 th\u1ec3 che gi\u1ea5u s\u1ef1 t\u01b0\u01a1ng t\u00e1c hi\u1ec7n di\u1ec7n trong qu\u00e1 tr\u00ecnh s\u1ea3n xu\u1ea5t b\u00ecnh th\u01b0\u1eddng. Ng\u01b0\u1ee3c l\u1ea1i, m\u1ed9t s\u1ef1 ki\u1ec7n ngo\u1ea1i l\u1ec7 kh\u00f4ng t\u1ef1 \u0111\u1ed9ng x\u00e1c \u0111\u1ecbnh m\u1ed9t y\u00eau c\u1ea7u li\u00ean t\u1ee5c.<\/p>\n<h2 style=\"margin:42px 0 14px;scroll-margin-top:96px\" id=\"part-3-separate-standards-context-from-a-device-decision\">Ph\u1ea7n 3. T\u00e1ch bi\u1ec7t ng\u1eef c\u1ea3nh ti\u00eau chu\u1ea9n kh\u1ecfi quy\u1ebft \u0111\u1ecbnh thi\u1ebft b\u1ecb<\/h2>\n<p style=\"margin:0 0 16px;line-height:1.7\">The <a href=\"https:\/\/standards.ieee.org\/ieee\/519\/5892\/\" rel=\"nofollow noopener\" target=\"_blank\">T\u1ed5ng quan v\u1ec1 IEEE 519<\/a> cung c\u1ea5p b\u1ed1i c\u1ea3nh h\u1eefu \u00edch cho c\u00e1c cu\u1ed9c th\u1ea3o lu\u1eadn v\u1ec1 \u0111i\u1ec1u khi\u1ec3n s\u00f3ng h\u00e0i, nh\u01b0ng n\u00f3 kh\u00f4ng quy \u0111\u1ecbnh c\u00e0i \u0111\u1eb7t linh ki\u1ec7n m\u1eb7c \u0111\u1ecbnh, b\u1ed1 tr\u00ed l\u1eafp \u0111\u1eb7t hay k\u1ebft qu\u1ea3 nghi\u1ec7m thu cho m\u1ecdi l\u01b0\u1edbi \u0111i\u1ec7n. Nh\u00f3m ch\u1ecbu tr\u00e1ch nhi\u1ec7m ph\u1ea3i x\u00e1c \u0111\u1ecbnh \u0111i\u1ec3m \u00e1p d\u1ee5ng, t\u1eadp d\u1eef li\u1ec7u, gi\u1ea3 \u0111\u1ecbnh v\u1ec1 t\u1ed5ng tr\u1edf ngu\u1ed3n, c\u00e1c tr\u01b0\u1eddng h\u1ee3p v\u1eadn h\u00e0nh v\u00e0 y\u00eau c\u1ea7u h\u1ee3p \u0111\u1ed3ng.<\/p>\n<p style=\"margin:0 0 16px;line-height:1.7\">D\u00f2ng \u0111i\u1ec7n h\u00e0i, \u0111\u1eb7c t\u00ednh c\u00f4ng su\u1ea5t ph\u1ea3n kh\u00e1ng, bi\u1ebfn \u0111\u1ed9ng \u0111i\u1ec7n \u00e1p, qu\u00e1 \u0111\u1ed9 \u0111\u00f3ng c\u1eaft, ho\u1ea1t \u0111\u1ed9ng b\u1ea3o v\u1ec7 v\u00e0 \u0111i\u1ec1u ki\u1ec7n nhi\u1ec7t c\u00f3 th\u1ec3 t\u1ed3n t\u1ea1i \u0111\u1ed3ng th\u1eddi m\u00e0 kh\u00f4ng c\u00f3 chung m\u1ed9t nguy\u00ean nh\u00e2n hay bi\u1ec7n ph\u00e1p kh\u1eafc ph\u1ee5c. Gi\u1eef cho m\u1ed7i c\u00e2u h\u1ecfi g\u1eafn li\u1ec1n v\u1edbi b\u1eb1ng ch\u1ee9ng c\u1ee7a ch\u00ednh n\u00f3. \u0110i\u1ec1u n\u00e0y ng\u0103n c\u1ea3n vi\u1ec7c m\u1ed9t linh ki\u1ec7n b\u1ecb l\u1ef1a ch\u1ecdn \u0111\u1ec3 gi\u1ea3i quy\u1ebft m\u1ed9t t\u00ecnh tr\u1ea1ng ch\u01b0a \u0111\u01b0\u1ee3c g\u1eafn k\u1ebft v\u1edbi gi\u1edbi h\u1ea1n \u0111\u00e3 \u0111\u01b0\u1ee3c t\u00e0i li\u1ec7u h\u00f3a.<\/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\u00e0i li\u1ec7u tham kh\u1ea3o NEMA MG 1<\/a> c\u00f3 t\u00ednh ch\u1ea5t tham kh\u1ea3o chung v\u1ec1 h\u1ec7 th\u1ed1ng \u0111\u1ed9ng c\u01a1, kh\u00f4ng ph\u1ea3i l\u00e0 b\u1eb1ng ch\u1ee9ng v\u1ec1 kh\u1ea3 n\u0103ng t\u01b0\u01a1ng th\u00edch ho\u1eb7c k\u1ebft qu\u1ea3 t\u1ea1i \u0111\u1ecba \u0111i\u1ec3m n\u00e0y. C\u00e1c t\u00e0i li\u1ec7u c\u1ee7a d\u1ef1 \u00e1n v\u00e0 vi\u1ec7c \u0111\u00e1nh gi\u00e1 k\u1ef9 thu\u1eadt \u0111\u1ee7 \u0111i\u1ec1u ki\u1ec7n v\u1eabn l\u00e0 c\u1ea7n thi\u1ebft 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-compare-integration-paths-without-defaulting-to-a-product\">Ph\u1ea7n 4. So s\u00e1nh c\u00e1c l\u1ed9 tr\u00ecnh t\u00edch h\u1ee3p m\u00e0 kh\u00f4ng m\u1eb7c \u0111\u1ecbnh ch\u1ecdn m\u1ed9t s\u1ea3n ph\u1ea9m<\/h2>\n<p style=\"margin:0 0 16px;line-height:1.7\">M\u1ed9t con \u0111\u01b0\u1eddng th\u00edch h\u1ee3p \u0111i theo m\u1ee5c ti\u00eau \u0111\u00e3 n\u00eau v\u00e0 b\u1ea3n ghi d\u1eef li\u1ec7u \u0111\u00e3 \u0111o \u0111\u1ea1c. Thi\u1ebft b\u1ecb hi\u1ec7n c\u00f3 c\u00f3 th\u1ec3 \u0111\u00e3 \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn k\u1ebft qu\u1ea3; vi\u1ec7c thay \u0111\u1ed5i m\u1ed9t ph\u1ea7n t\u1eed m\u00e0 kh\u00f4ng xem x\u00e9t thanh c\u00e1i, m\u00e1y bi\u1ebfn \u00e1p, h\u1ec7 th\u1ed1ng \u0111i\u1ec1u khi\u1ec3n, h\u1ec7 th\u1ed1ng b\u1ea3o v\u1ec7 v\u00e0 l\u1ecbch tr\u00ecnh v\u1eadn h\u00e0nh c\u00f3 th\u1ec3 t\u1ea1o ra m\u1ed9t ph\u1ea1m vi c\u00f4ng vi\u1ec7c kh\u00f4ng ho\u00e0n ch\u1ec9nh.<\/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\">Danh m\u1ee5c t\u00f9y ch\u1ecdn<\/th>\n<th style=\"border:1px solid #d9e1e8;padding:9px 12px;background:#f5f8fa;text-align:left\">C\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c xem x\u00e9t khi<\/th>\n<th style=\"border:1px solid #d9e1e8;padding:9px 12px;background:#f5f8fa;text-align:left\">Ph\u1ea3i \u0111\u01b0\u1ee3c x\u00e1c nh\u1eadn<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td style=\"border:1px solid #d9e1e8;padding:9px 12px\">B\u1ed9 l\u1ecdc s\u00f3ng h\u00e0i t\u00edch c\u1ef1c AHF<\/td>\n<td style=\"border:1px solid #d9e1e8;padding:9px 12px\">measured harmonic current is the stated objective and the CT reference and installation arrangement are verified<\/td>\n<td style=\"border:1px solid #d9e1e8;padding:9px 12px\">\u0110i\u1ec3m \u0111\u1ea5u n\u1ed1i, c\u01a1 s\u1edf c\u00f4ng su\u1ea5t, h\u1ec7 th\u1ed1ng \u0111i\u1ec1u khi\u1ec3n, nhi\u1ec7t \u0111\u1ed9, b\u1ea3o v\u1ec7 v\u00e0 ph\u01b0\u01a1ng ph\u00e1p nghi\u1ec7m thu<\/td>\n<\/tr>\n<tr>\n<td style=\"border:1px solid #d9e1e8;padding:9px 12px\">Linh ki\u1ec7n th\u1ee5 \u0111\u1ed9ng<\/td>\n<td style=\"border:1px solid #d9e1e8;padding:9px 12px\">M\u1ed9t nghi\u00ean c\u1ee9u v\u1ec1 m\u1ea1ng l\u01b0\u1edbi x\u00e1c \u0111\u1ecbnh m\u1ed9t ch\u1ee9c n\u0103ng c\u1ed1 \u0111\u1ecbnh ho\u1eb7c \u0111\u00e3 \u0111\u01b0\u1ee3c \u0111i\u1ec1u ch\u1ec9nh<\/td>\n<td style=\"border:1px solid #d9e1e8;padding:9px 12px\">Hi\u1ec7n t\u01b0\u1ee3ng c\u1ed9ng h\u01b0\u1edfng, h\u1ec7 s\u1ed1 l\u00e0m vi\u1ec7c c\u1ee7a m\u1ea1ch chuy\u1ec3n m\u1ea1ch, d\u1eef li\u1ec7u m\u1ea1ng, \u0111\u1ecbnh m\u1ee9c linh ki\u1ec7n v\u00e0 l\u1eafp \u0111\u1eb7t v\u1eadt l\u00fd<\/td>\n<\/tr>\n<tr>\n<td style=\"border:1px solid #d9e1e8;padding:9px 12px\">Thay \u0111\u1ed5i v\u1ec1 v\u1eadn h\u00e0nh ho\u1eb7c th\u01b0\u1ee3ng ngu\u1ed3n<\/td>\n<td style=\"border:1px solid #d9e1e8;padding:9px 12px\">C\u1ea5u h\u00ecnh ho\u1eb7c l\u1ecbch tr\u00ecnh ngu\u1ed3n l\u00e0 quan tr\u1ecdng<\/td>\n<td style=\"border:1px solid #d9e1e8;padding:9px 12px\">Tr\u00e1ch nhi\u1ec7m c\u1ee7a ch\u1ee7 s\u1edf h\u1eefu, ph\u1ed1i h\u1ee3p ti\u1ec7n \u00edch v\u00e0 l\u1ed9 tr\u00ecnh tri\u1ec3n khai<\/td>\n<\/tr>\n<tr>\n<td style=\"border:1px solid #d9e1e8;padding:9px 12px\">\u0110o l\u01b0\u1eddng th\u00eam<\/td>\n<td style=\"border:1px solid #d9e1e8;padding:9px 12px\">Ngu\u1ed3n g\u1ed1c ho\u1eb7c ranh gi\u1edbi v\u1eabn ch\u01b0a ch\u1eafc ch\u1eafn<\/td>\n<td style=\"border:1px solid #d9e1e8;padding:9px 12px\">K\u1ebf ho\u1ea1ch \u0111o \u0111\u1ea1c, tr\u1ea1ng th\u00e1i ho\u1ea1t \u0111\u1ed9ng, th\u1eddi gian v\u00e0 ph\u01b0\u01a1ng ph\u00e1p so s\u00e1nh<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p style=\"margin:0 0 16px;line-height:1.7\">\u0110\u1ec3 th\u1ea3o lu\u1eadn v\u1ec1 d\u00f2ng s\u1ea3n ph\u1ea9m, h\u00e3y xem <a href=\"https:\/\/cnbygele.com\/vi\/product\/ahf-active-harmonic-filter-harmonic-control\/\">B\u1ed9 l\u1ecdc s\u00f3ng h\u00e0i ch\u1ee7 \u0111\u1ed9ng CNBYG AHF<\/a>. Trang n\u00e0y kh\u00f4ng thay th\u1ebf cho nghi\u00ean c\u1ee9u d\u1ef1 \u00e1n. T\u00e0i li\u1ec7u \u0111\u1ecdc li\u00ean quan v\u1ec1 <a href=\"https:\/\/cnbygele.com\/vi\/blog\/power-quality-metering-before-apf-svg-rfq\/\">h\u01b0\u1edbng d\u1eabn k\u1ef9 thu\u1eadt n\u00e0y<\/a> th\u00eam ng\u1eef c\u1ea3nh h\u1ec7 th\u1ed1ng l\u00e2n c\u1eadn.<\/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\/07\/static-var-compensation-system-design-basics-body-1.webp\" alt=\"CNBYG equipment context supporting apf ct placement wiring installation planning\" \/><\/figure>\n<h2 style=\"margin:42px 0 14px;scroll-margin-top:96px\" id=\"part-5-prepare-the-rfq-and-commissioning-record\">Ph\u1ea7n 5. Chu\u1ea9n b\u1ecb RFQ v\u00e0 bi\u00ean b\u1ea3n ch\u1ea1y th\u1eed<\/h2>\n<p style=\"margin:0 0 16px;line-height:1.7\">Y\u00eau c\u1ea7u b\u00e1o gi\u00e1 (RFQ) s\u1ebd r\u00f5 r\u00e0ng h\u01a1n khi n\u00f3 bao g\u1ed3m s\u01a1 \u0111\u1ed3 \u0111\u01a1n tuy\u1ebfn, \u0111i\u1ec7n \u00e1p \u0111\u1ecbnh m\u1ee9c v\u00e0 t\u1ea7n s\u1ed1, th\u00f4ng tin chi ti\u1ebft v\u1ec1 m\u00e1y bi\u1ebfn \u00e1p, c\u00e1c t\u1ec7p \u0111o l\u01b0\u1eddng ho\u1eb7c b\u1ea3n t\u00f3m t\u1eaft \u0111\u1ea1i di\u1ec7n, b\u1ea3ng bi\u1ec3u t\u1ea3i, danh s\u00e1ch thi\u1ebft b\u1ecb hi\u1ec7n c\u00f3, v\u1ecb tr\u00ed \u0111\u1ea5u n\u1ed1i \u0111\u1ec1 xu\u1ea5t, th\u00f4ng tin b\u1ea3o v\u1ec7, tuy\u1ebfn c\u00e1p, kh\u00f4ng gian, \u0111i\u1ec1u ki\u1ec7n l\u00e0m m\u00e1t ho\u1eb7c m\u00f4i tr\u01b0\u1eddng, nhu c\u1ea7u truy\u1ec1n th\u00f4ng, v\u00e0 quy\u1ebft \u0111\u1ecbnh m\u00e0 ch\u1ee7 \u0111\u1ea7u t\u01b0 k\u1ef3 v\u1ecdng thi\u1ebft b\u1ecb s\u1ebd h\u1ed7 tr\u1ee3.<\/p>\n<p style=\"margin:0 0 16px;line-height:1.7\">Vi\u1ec7c nghi\u1ec7m thu ph\u1ea3i so s\u00e1nh c\u00e1c th\u00f4ng s\u1ed1 t\u01b0\u01a1ng \u0111\u1ed3ng. S\u1eed d\u1ee5ng c\u00e1c v\u1ecb tr\u00ed \u0111\u1ed3ng h\u1ed3 \u0111o \u0111\u00e3 th\u1ecfa thu\u1eadn, tr\u1ea1ng th\u00e1i v\u1eadn h\u00e0nh, quy \u01b0\u1edbc bi\u1ebfn d\u00f2ng (CT), kho\u1ea3ng th\u1eddi gian v\u00e0 ph\u01b0\u01a1ng ph\u00e1p nghi\u1ec7m thu. Ghi l\u1ea1i c\u00e1c t\u1ea3i tr\u1ecdng l\u1edbn n\u00e0o \u0111ang ch\u1ea1y, giai \u0111o\u1ea1n ho\u1eb7c ch\u1ebf \u0111\u1ed9 \u0111i\u1ec1u khi\u1ec3n n\u00e0o \u0111ang ho\u1ea1t \u0111\u1ed9ng, v\u00e0 b\u1ed1 tr\u00ed l\u1eafp \u0111\u1eb7t c\u00f3 kh\u1edbp v\u1edbi b\u1ea3n v\u1ebd \u0111\u01b0\u1ee3c ph\u00ea duy\u1ec7t hay kh\u00f4ng. Tr\u1ea1ng th\u00e1i v\u1eadn h\u00e0nh thay \u0111\u1ed5i ho\u1eb7c v\u1ecb tr\u00ed \u0111\u1ed3ng h\u1ed3 \u0111o kh\u00e1c c\u00f3 th\u1ec3 l\u00e0m thay \u0111\u1ed5i k\u1ebft qu\u1ea3 m\u00e0 kh\u00f4ng ch\u1ee9ng minh \u0111\u01b0\u1ee3c s\u1ef1 thay \u0111\u1ed5i c\u1ee7a thi\u1ebft b\u1ecb.<\/p>\n<p style=\"margin:0 0 16px;line-height:1.7\">Khi d\u1ef1 \u00e1n bao g\u1ed3m c\u00e1c v\u1ea5n \u0111\u1ec1 c\u00f3 li\u00ean quan, <a href=\"https:\/\/cnbygele.com\/vi\/blog\/vfd-harmonics-industrial-plants-apf-selection\/\">h\u01b0\u1edbng d\u1eabn \u1ee9ng d\u1ee5ng n\u00e0y<\/a> gi\u00fap \u0111\u1ecbnh h\u00ecnh m\u1ed9t cu\u1ed9c th\u1ea3o lu\u1eadn li\u1ec1n k\u1ec1 d\u1ef1a tr\u00ean \u0111o l\u01b0\u1eddng. N\u00f3 kh\u00f4ng lo\u1ea1i b\u1ecf s\u1ef1 c\u1ea7n thi\u1ebft ph\u1ea3i t\u00e0i li\u1ec7u h\u00f3a ranh gi\u1edbi c\u1ee5 th\u1ec3 c\u1ee7a b\u00e0i vi\u1ebft n\u00e0y.<\/p>\n<h2 style=\"margin:42px 0 14px;scroll-margin-top:96px\" id=\"part-6-apply-the-fit-boundary-before-requesting-equipment\">Ph\u1ea7n 6. \u00c1p d\u1ee5ng gi\u1edbi h\u1ea1n ph\u00f9 h\u1ee3p tr\u01b0\u1edbc khi y\u00eau c\u1ea7u thi\u1ebft b\u1ecb<\/h2>\n<p style=\"margin:0 0 16px;line-height:1.7\">This article is intentionally limited: This is an installation and signal-integrity guide, not APF capacity sizing, a protection-study substitute, or a guarantee of post-installation performance. The role of the planning record is to make uncertainty visible early enough to set a suitable scope. Regulated, critical, or unusual installations need the responsible owner, system engineer, utility where applicable, and qualified specialists to review the actual project data.<\/p>\n<p style=\"margin:0 0 16px;line-height:1.7\">Tr\u01b0\u1edbc khi y\u00eau c\u1ea7u CNBYG th\u1ea3o lu\u1eadn v\u1ec1 s\u1ea3n ph\u1ea9m, h\u00e3y x\u00e1c \u0111\u1ecbnh m\u1ee5c ti\u00eau, kho\u1ea3ng th\u1eddi gian c\u00f3 b\u1eb1ng ch\u1ee9ng, ranh gi\u1edbi, thi\u1ebft b\u1ecb hi\u1ec7n t\u1ea1i, c\u00e1c r\u00e0ng bu\u1ed9c t\u00edch h\u1ee3p v\u00e0 ng\u01b0\u1eddi ch\u1ecbu tr\u00e1ch nhi\u1ec7m ra quy\u1ebft \u0111\u1ecbnh. S\u1eed d\u1ee5ng <a href=\"https:\/\/cnbygele.com\/vi\/contact-us\/\">Trang li\u00ean h\u1ec7 CNBYG<\/a> \u0111\u1ec3 cung c\u1ea5p c\u00e1c h\u1ed3 s\u01a1 hi\u1ec7n c\u00f3. M\u1ed9t y\u00eau c\u1ea7u \u0111\u1ea7y \u0111\u1ee7 h\u1ed7 tr\u1ee3 m\u1ed9t ph\u1ea3n h\u1ed3i c\u00f3 tr\u1ecdng t\u00e2m; n\u00f3 kh\u00f4ng thay th\u1ebf cho nghi\u00ean c\u1ee9u, quy\u1ebft \u0111\u1ecbnh c\u1ea5p ch\u1ee9ng nh\u1eadn ho\u1eb7c quy tr\u00ecnh v\u1eadn h\u00e0nh trang thi\u1ebft b\u1ecb.<\/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\/07\/static-var-compensation-system-design-basics-product.webp\" alt=\"CNBYG product-line context for apf ct placement wiring RFQ preparation\" \/><\/figure>\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\">Where should APF current transformers be placed?<\/h3>\n<p style=\"margin:0 0 16px;line-height:1.7\">Place them at the electrical location that represents the defined compensation boundary, following the approved single-line and manufacturer integration documentation. A feeder CT and a main-bus CT answer different control questions.<\/p>\n<h3 style=\"margin:28px 0 12px\">Why does CT polarity matter for an active harmonic filter?<\/h3>\n<p style=\"margin:0 0 16px;line-height:1.7\">Polarity establishes the direction of the measured current. A reversed reference can cause incorrect compensation behavior or commissioning alarms, so it must be checked against the approved phase convention.<\/p>\n<h3 style=\"margin:28px 0 12px\">Can APF CT wiring share any available cable route?<\/h3>\n<p style=\"margin:0 0 16px;line-height:1.7\">Routing must consider the installation design, separation from disturbance sources, shielding or grounding practices where specified, and accessible test points. Do not improvise a route without the approved wiring detail.<\/p>\n<h3 style=\"margin:28px 0 12px\">M\u1ed9t ph\u00e9p \u0111o c\u00f3 \u0111\u1ee7 \u0111\u1ec3 l\u1ef1a ch\u1ecdn thi\u1ebft b\u1ecb gi\u1ea3m thi\u1ec3u hay kh\u00f4ng?<\/h3>\n<p style=\"margin:0 0 16px;line-height:1.7\">Th\u01b0\u1eddng th\u00ec kh\u00f4ng. V\u1ecb tr\u00ed \u0111o, \u0111i\u1ec1u ki\u1ec7n v\u1eadn h\u00e0nh, th\u1eddi gian, c\u1ea5u tr\u00fac t\u00f4-p\u00f4 v\u00e0 m\u1ee5c ti\u00eau d\u1ef1 \u00e1n quy\u1ebft \u0111\u1ecbnh xem b\u1ea3n ghi c\u00f3 mang t\u00ednh \u0111\u1ea1i di\u1ec7n hay kh\u00f4ng.<\/p>\n<h3 style=\"margin:28px 0 12px\">C\u00f3 th\u1ec3 ch\u1ecdn thi\u1ebft b\u1ecb ch\u1ec9 d\u1ef1a tr\u00ean t\u1ea3i \u0111\u00e3 k\u1ebft n\u1ed1i kh\u00f4ng?<\/h3>\n<p style=\"margin:0 0 16px;line-height:1.7\">Kh\u00f4ng. M\u1ed9t \u0111\u00e1nh gi\u00e1 d\u1ef1 \u00e1n c\u1ea7n c\u00f3 h\u00e0nh vi \u0111\u01b0\u1ee3c \u0111o l\u01b0\u1eddng, c\u1ea5u h\u00ecnh v\u1eadn h\u00e0nh, c\u1ea5u tr\u00fac topology l\u1eafp \u0111\u1eb7t, thi\u1ebft b\u1ecb hi\u1ec7n c\u00f3 v\u00e0 m\u1ed9t m\u1ee5c ti\u00eau \u0111\u01b0\u1ee3c x\u00e1c \u0111\u1ecbnh r\u00f5 r\u00e0ng.<\/p>\n<h3 style=\"margin:28px 0 12px\">H\u01b0\u1edbng d\u1eabn n\u00e0y c\u00f3 \u0111\u1ea3m b\u1ea3o k\u1ebft qu\u1ea3 tu\u00e2n th\u1ee7 ho\u1eb7c v\u1eadn h\u00e0nh kh\u00f4ng?<\/h3>\n<p style=\"margin:0 0 16px;line-height:1.7\">No. This is an installation and signal-integrity guide, not apf capacity sizing, a protection-study substitute, or a guarantee of post-installation performance. must be established and verified through the responsible project process.<\/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\">IEEE 519 \u2014 Ki\u1ec3m so\u00e1t s\u00f3ng h\u00e0i trong h\u1ec7 th\u1ed1ng \u0111i\u1ec7n<\/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\">NEMA MG 1 \u2014 \u0110\u1ed9ng c\u01a1 v\u00e0 M\u00e1y ph\u00e1t \u0111i\u1ec7n<\/a><\/li>\n<li style=\"margin:0 0 8px\"><a href=\"https:\/\/www.energy.gov\/eere\/iedo\/industrial-decarbonization\" rel=\"nofollow noopener\" target=\"_blank\">B\u1ed9 N\u0103ng l\u01b0\u1ee3ng Hoa K\u1ef3 \u2014 Kh\u1eed carbon trong c\u00f4ng nghi\u1ec7p<\/a><\/li>\n<\/ul>\n<\/div>","protected":false},"excerpt":{"rendered":"<p>Ct location, polarity, wiring, and commissioning evidence for apf integration should begin with a documented electrical boundary, representative operating record, and a defined decision. A meter reading, a component nameplate, or a single switching event does not by itself establish the cause, the required equipment, or the acceptance criteria. Contents Part 1. Start with the [&hellip;]<\/p>\n","protected":false},"author":4,"featured_media":0,"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-2582","post","type-post","status-publish","format-standard","hentry","category-blog"],"blocksy_meta":{"styles_descriptor":{"styles":{"desktop":"","tablet":"","mobile":""},"google_fonts":[],"version":7}},"acf":[],"amp_enabled":true,"_links":{"self":[{"href":"https:\/\/cnbygele.com\/vi\/wp-json\/wp\/v2\/posts\/2582","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\/4"}],"replies":[{"embeddable":true,"href":"https:\/\/cnbygele.com\/vi\/wp-json\/wp\/v2\/comments?post=2582"}],"version-history":[{"count":1,"href":"https:\/\/cnbygele.com\/vi\/wp-json\/wp\/v2\/posts\/2582\/revisions"}],"predecessor-version":[{"id":2597,"href":"https:\/\/cnbygele.com\/vi\/wp-json\/wp\/v2\/posts\/2582\/revisions\/2597"}],"wp:attachment":[{"href":"https:\/\/cnbygele.com\/vi\/wp-json\/wp\/v2\/media?parent=2582"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/cnbygele.com\/vi\/wp-json\/wp\/v2\/categories?post=2582"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/cnbygele.com\/vi\/wp-json\/wp\/v2\/tags?post=2582"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}