{"id":21341,"date":"2026-01-18T22:33:04","date_gmt":"2026-01-18T14:33:04","guid":{"rendered":"https:\/\/viox.com\/?p=21341"},"modified":"2026-01-18T22:33:06","modified_gmt":"2026-01-18T14:33:06","slug":"single-pole-vs-double-pole-breaker-1p-1pn-2p-guide","status":"publish","type":"post","link":"https:\/\/test.viox.com\/vi\/single-pole-vs-double-pole-breaker-1p-1pn-2p-guide\/","title":{"rendered":"Aptomat m\u1ed9t c\u1ef1c (1P) so v\u1edbi aptomat hai c\u1ef1c (2P): Khi n\u00e0o n\u00ean s\u1eed d\u1ee5ng 1P, 1P+N ho\u1eb7c 2P?"},"content":{"rendered":"<div class=\"product-intro\">\n<p>Vi\u1ec7c l\u1ef1a ch\u1ecdn c\u1ea5u h\u00ecnh c\u1ef1c c\u1ee7a c\u1ea7u dao (MCB) ph\u00f9 h\u1ee3p l\u00e0 m\u1ed9t trong nh\u1eefng quy\u1ebft \u0111\u1ecbnh quan tr\u1ecdng nh\u1ea5t\u2014v\u00e0 th\u01b0\u1eddng b\u1ecb hi\u1ec3u sai\u2014trong thi\u1ebft k\u1ebf h\u1ec7 th\u1ed1ng \u0111i\u1ec7n. S\u1ef1 kh\u00e1c bi\u1ec7t gi\u1eefa c\u1ea7u dao m\u1ed9t c\u1ef1c (1P), m\u1ed9t c\u1ef1c c\u00f3 trung t\u00ednh (1P+N) v\u00e0 hai c\u1ef1c (2P) kh\u00f4ng ch\u1ec9 quy\u1ebft \u0111\u1ecbnh h\u1ec7 th\u1ed1ng c\u1ee7a b\u1ea1n c\u00f3 ho\u1ea1t \u0111\u1ed9ng hay kh\u00f4ng m\u00e0 c\u00f2n quy\u1ebft \u0111\u1ecbnh xem n\u00f3 c\u00f3 b\u1ea3o v\u1ec7 thi\u1ebft b\u1ecb v\u00e0 nh\u00e2n vi\u00ean m\u1ed9t c\u00e1ch an to\u00e0n hay kh\u00f4ng. S\u1eed d\u1ee5ng c\u1ea5u h\u00ecnh sai c\u00f3 th\u1ec3 khi\u1ebfn d\u00e2y d\u1eabn v\u1eabn c\u00f3 \u0111i\u1ec7n ngay c\u1ea3 khi c\u1ea7u dao \u0111\u00e3 t\u1eaft, t\u1ea1o ra c\u00e1c m\u1ed1i nguy hi\u1ec3m v\u1ec1 \u0111i\u1ec7n gi\u1eadt \u00e2m th\u1ea7m. N\u00f3 c\u0169ng c\u00f3 th\u1ec3 vi ph\u1ea1m c\u00e1c quy t\u1eafc v\u1ec1 \u0111i\u1ec7n, l\u00e0m \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn ph\u1ea1m vi b\u1ea3o h\u00e0nh v\u00e0 khi\u1ebfn c\u00e1c nh\u00e0 qu\u1ea3n l\u00fd c\u01a1 s\u1edf ph\u1ea3i ch\u1ecbu tr\u00e1ch nhi\u1ec7m ph\u00e1p l\u00fd nghi\u00eam tr\u1ecdng. H\u01b0\u1edbng d\u1eabn n\u00e0y lo\u1ea1i b\u1ecf s\u1ef1 nh\u1ea7m l\u1eabn b\u1eb1ng m\u1ed9t khu\u00f4n kh\u1ed5 th\u1ef1c t\u1ebf \u0111\u1ec3 l\u1ef1a ch\u1ecdn c\u1ea5u h\u00ecnh c\u1ef1c ph\u00f9 h\u1ee3p d\u1ef1a tr\u00ean h\u1ec7 th\u1ed1ng \u0111i\u1ec7n, \u0111\u1eb7c \u0111i\u1ec3m t\u1ea3i v\u00e0 ti\u00eau chu\u1ea9n khu v\u1ef1c c\u1ee5 th\u1ec3 c\u1ee7a b\u1ea1n.<\/p>\n<h2>C\u1ef1c c\u1ee7a c\u1ea7u dao \u0111i\u1ec7n l\u00e0 g\u00ec?<\/h2>\n<p>M\u1ed9t <strong>c\u1ef1c<\/strong> trong c\u1ea7u dao \u0111\u1ec1 c\u1eadp \u0111\u1ebfn m\u1ed9t c\u01a1 ch\u1ebf chuy\u1ec3n m\u1ea1ch \u0111\u1ed9c l\u1eadp, \u0111i\u1ec1u khi\u1ec3n m\u1ed9t d\u00e2y d\u1eabn (d\u00e2y \u0111i\u1ec7n). H\u00e3y coi n\u00f3 nh\u01b0 m\u1ed9t c\u00f4ng t\u1eafc ri\u00eang l\u1ebb c\u00f3 th\u1ec3 ng\u1eaft d\u00f2ng \u0111i\u1ec7n; trong c\u00e1c c\u1ea7u dao nhi\u1ec1u c\u1ef1c, c\u00e1c c\u00f4ng t\u1eafc n\u00e0y \u0111\u01b0\u1ee3c li\u00ean k\u1ebft c\u01a1 h\u1ecdc \u0111\u1ec3 ch\u00fang t\u00e1c \u0111\u1ed9ng c\u00f9ng nhau trong \u0111i\u1ec1u ki\u1ec7n s\u1ef1 c\u1ed1. S\u1ed1 l\u01b0\u1ee3ng c\u1ef1c x\u00e1c \u0111\u1ecbnh tr\u1ef1c ti\u1ebfp lo\u1ea1i h\u1ec7 th\u1ed1ng \u0111i\u1ec7n n\u00e0o m\u00e0 c\u1ea7u dao c\u00f3 th\u1ec3 b\u1ea3o v\u1ec7 an to\u00e0n v\u00e0 li\u1ec7u m\u1ed9t s\u1ed1 d\u00e2y d\u1eabn nh\u1ea5t \u0111\u1ecbnh c\u00f3 c\u00f2n \u0111\u01b0\u1ee3c c\u1ea5p \u0111i\u1ec7n trong qu\u00e1 tr\u00ecnh x\u1ea3y ra s\u1ef1 c\u1ed1 ho\u1eb7c ng\u1eebng ho\u1ea1t \u0111\u1ed9ng \u0111\u1ec3 b\u1ea3o tr\u00ec hay kh\u00f4ng.<\/p>\n<figure style=\"text-align: center; margin: 20px 0;\">\n        <img decoding=\"async\" src=\"https:\/\/img.viox.com\/Close-up-side-by-side-comparison-of-VIOX-single-pole-single-pole-with-neutral-and-double-pole-circuit-breakers-showing-width-differences-and-onoff-switches.webp\" alt=\"Close-up side-by-side comparison of VIOX 1P, 1P+N, and 2P circuit breakers showing width differences\" style=\"max-width: 100%; height: auto;\"><figcaption style=\"font-style: italic; margin-top: 8px; color: #555;\">H\u00ecnh 1: So s\u00e1nh tr\u1ef1c quan c\u1ea1nh nhau gi\u1eefa c\u00e1c c\u1ea7u dao VIOX 1P (18mm), 1P+N (18mm) v\u00e0 2P (36mm), minh h\u1ecda s\u1ef1 kh\u00e1c bi\u1ec7t v\u1ec1 chi\u1ec1u r\u1ed9ng module v\u00e0 li\u00ean k\u1ebft c\u00f4ng t\u1eafc.<\/figcaption><\/figure>\n<p>M\u1ed7i c\u1ef1c chi\u1ebfm kho\u1ea3ng 18mm kh\u00f4ng gian tr\u00ean thanh ray DIN v\u00e0 bao g\u1ed3m:<\/p>\n<ul>\n<li>M\u1ed9t ph\u1ea7n t\u1eed nhi\u1ec7t (d\u1ea3i l\u01b0\u1ee1ng kim) \u0111\u1ec3 b\u1ea3o v\u1ec7 qu\u00e1 t\u1ea3i<\/li>\n<li>M\u1ed9t ph\u1ea7n t\u1eed t\u1eeb t\u00ednh (cu\u1ed9n d\u00e2y) \u0111\u1ec3 ph\u00e1t hi\u1ec7n ng\u1eafn m\u1ea1ch<\/li>\n<li>C\u00e1c ti\u1ebfp \u0111i\u1ec3m t\u00e1ch r\u1eddi v\u1eadt l\u00fd \u0111\u1ec3 ng\u1eaft d\u00f2ng \u0111i\u1ec7n<\/li>\n<li>M\u1ed9t li\u00ean k\u1ebft c\u01a1 h\u1ecdc k\u1ebft n\u1ed1i t\u1ea5t c\u1ea3 c\u00e1c c\u1ef1c trong b\u1ed9 c\u1ea7u dao<\/li>\n<\/ul>\n<p>S\u1ef1 kh\u00e1c bi\u1ec7t quan tr\u1ecdng l\u00e0 <strong>nhi\u1ec1u c\u1ef1c h\u01a1n kh\u00f4ng nh\u1ea5t thi\u1ebft c\u00f3 ngh\u0129a l\u00e0 b\u1ea3o v\u1ec7 t\u1ed1t h\u01a1n<\/strong>\u2014ch\u00fang c\u00f3 ngh\u0129a l\u00e0 c\u00e1c chi\u1ebfn l\u01b0\u1ee3c b\u1ea3o v\u1ec7 kh\u00e1c nhau \u0111\u01b0\u1ee3c \u00e1p d\u1ee5ng cho c\u00e1c d\u00e2y d\u1eabn kh\u00e1c nhau. C\u1ea7u dao 1P b\u1ea3o v\u1ec7 m\u1ed9t d\u00e2y d\u1eabn pha; c\u1ea7u dao 1P+N b\u1ea3o v\u1ec7 m\u1ed9t d\u00e2y d\u1eabn pha \u0111\u1ed3ng th\u1eddi cung c\u1ea5p d\u00e2y trung t\u00ednh <em>chuy\u1ec3n \u0111\u1ed5i<\/em> (nh\u01b0ng th\u01b0\u1eddng kh\u00f4ng b\u1ea3o v\u1ec7); v\u00e0 c\u1ea7u dao 2P b\u1ea3o v\u1ec7 c\u1ea3 hai d\u00e2y d\u1eabn pha nh\u01b0 nhau.<\/p>\n<h2>C\u1ea7u dao 1P (M\u1ed9t c\u1ef1c): Nh\u1eefng \u0111i\u1ec1u c\u01a1 b\u1ea3n<\/h2>\n<p><strong>C\u1ea7u dao m\u1ed9t c\u1ef1c l\u00e0 thi\u1ebft b\u1ecb ch\u1ee7 l\u1ef1c c\u1ee7a h\u1ec7 th\u1ed1ng \u0111i\u1ec7n d\u00e2n d\u1ee5ng<\/strong>, b\u1ea3o v\u1ec7 c\u00e1c m\u1ea1ch 120V ri\u00eang l\u1ebb trong c\u00e1c l\u1eafp \u0111\u1eb7t \u1edf B\u1eafc M\u1ef9 v\u00e0 c\u00e1c m\u1ea1ch m\u1ed9t pha 230V \u1edf c\u00e1c khu v\u1ef1c theo ti\u00eau chu\u1ea9n IEC. Ch\u00fang l\u00e0 l\u1ef1a ch\u1ecdn nh\u1ecf nh\u1ea5t v\u00e0 kinh t\u1ebf nh\u1ea5t, chi\u1ebfm m\u1ed9t module thanh ray DIN duy nh\u1ea5t.<\/p>\n<h3>Th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt<\/h3>\n<ul>\n<li><strong>\u0110i\u1ec7n \u0110\u00e1nh Gi\u00e1<\/strong>: 120V AC (US) ho\u1eb7c 230V AC (IEC)<\/li>\n<li><strong>\u0110\u00e1nh Gi\u00e1 C\u1ee7a Hi\u1ec7n T\u1ea1i<\/strong>: 6A \u0111\u1ebfn 63A (ph\u1ed5 bi\u1ebfn nh\u1ea5t: 15A, 20A, 32A)<\/li>\n<li><strong>Chi\u1ec1u r\u1ed9ng module<\/strong>: 1 module (18mm)<\/li>\n<li><strong>Kh\u1ea3 N\u0103ng Ph\u00e1 V\u1ee1<\/strong>: 6kA \u0111\u1ebfn 10kA (IEC 60898-1)<\/li>\n<li><strong>S\u1ed1 l\u01b0\u1ee3ng d\u00e2y d\u1eabn \u0111\u01b0\u1ee3c b\u1ea3o v\u1ec7<\/strong>: 1 (ch\u1ec9 d\u00e2y pha)<\/li>\n<\/ul>\n<h3>C\u00e1ch th\u1ee9c b\u1ea3o v\u1ec7 1P ho\u1ea1t \u0111\u1ed9ng<\/h3>\n<figure style=\"text-align: center; margin: 20px 0;\">\n        <img decoding=\"async\" src=\"https:\/\/img.viox.com\/Technical-cutaway-diagram-comparing-internal-mechanisms-of-VIOX-1P-phase-protection-1PN-phase-protection--neutral-switching-and-2P-dual-pole-protection-circuit-breakers.webp\" alt=\"Technical cutaway diagram of VIOX 1P, 1P+N, and 2P circuit breaker internal mechanisms\" style=\"max-width: 100%; height: auto;\"><figcaption style=\"font-style: italic; margin-top: 8px; color: #555;\">H\u00ecnh 2: M\u1eb7t c\u1eaft c\u01a1 ch\u1ebf b\u00ean trong so s\u00e1nh ki\u1ebfn tr\u00fac c\u1ee7a VIOX 1P (B\u1ea3o v\u1ec7 pha), 1P+N (B\u1ea3o v\u1ec7 pha + Chuy\u1ec3n m\u1ea1ch trung t\u00ednh) v\u00e0 2P (B\u1ea3o v\u1ec7 hai c\u1ef1c).<\/figcaption><\/figure>\n<p>C\u1ea7u dao 1P gi\u00e1m s\u00e1t d\u00f2ng \u0111i\u1ec7n ch\u1ea1y qua <strong>ch\u1ec9 d\u00e2y pha (d\u00e2y n\u00f3ng)<\/strong>. D\u00e2y trung t\u00ednh k\u1ebft n\u1ed1i tr\u1ef1c ti\u1ebfp v\u1edbi m\u1ed9t thanh c\u00e1i trung t\u00ednh chung trong b\u1ea3ng \u0111i\u1ec7n v\u00e0 v\u1eabn \u0111\u01b0\u1ee3c k\u1ebft n\u1ed1i ngay c\u1ea3 khi c\u1ea7u dao t\u00e1c \u0111\u1ed9ng. \u0110i\u1ec1u n\u00e0y t\u1ea1o ra m\u1ed9t h\u1ea1n ch\u1ebf c\u01a1 b\u1ea3n: <strong>n\u1ebfu m\u1ed9t s\u1ef1 c\u1ed1 l\u00e0m cho d\u00e2y trung t\u00ednh \u201cc\u00f3 \u0111i\u1ec7n\u201d \u1edf n\u01a1i kh\u00e1c trong h\u1ec7 th\u1ed1ng<\/strong>, \u0111i\u1ec7n \u00e1p nguy hi\u1ec3m \u0111\u00f3 c\u00f3 th\u1ec3 v\u1eabn c\u00f2n ngay c\u1ea3 khi c\u1ea7u dao c\u1ee5c b\u1ed9 c\u1ee7a b\u1ea1n \u0111\u00e3 t\u1eaft.<\/p>\n<h3>Khi n\u00e0o n\u00ean s\u1eed d\u1ee5ng 1P<\/h3>\n<ul>\n<li>M\u1ea1ch chi\u1ebfu s\u00e1ng d\u00e2n d\u1ee5ng ti\u00eau chu\u1ea9n<\/li>\n<li>\u1ed4 c\u1eafm \u0111a n\u0103ng (l\u00ean \u0111\u1ebfn c\u00f4ng su\u1ea5t an to\u00e0n c\u1ee7a b\u1ea3ng \u0111i\u1ec7n)<\/li>\n<li>M\u1ea1ch cho c\u00e1c thi\u1ebft b\u1ecb nh\u1ecf (m\u00e1y r\u1eeda ch\u00e9n, m\u00e1y nghi\u1ec1n r\u00e1c, l\u00f2 vi s\u00f3ng)<\/li>\n<li>Trong h\u1ec7 th\u1ed1ng n\u1ed1i \u0111\u1ea5t TN-S, n\u01a1i d\u00e2y trung t\u00ednh \u0111\u01b0\u1ee3c n\u1ed1i \u0111\u1ea5t \u0111\u00e1ng tin c\u1eady<\/li>\n<li>Chi ph\u00ed l\u00e0 m\u1ed9t h\u1ea1n ch\u1ebf ch\u00ednh v\u00e0 an to\u00e0n h\u1ec7 th\u1ed1ng kh\u00f4ng cho ph\u00e9p chuy\u1ec3n m\u1ea1ch trung t\u00ednh<\/li>\n<\/ul>\n<h3>H\u1ea1n ch\u1ebf quan tr\u1ecdng<\/h3>\n<p>dr. tr\u01b0\u1edbc <strong>C\u1ea7u dao 1P kh\u00f4ng th\u1ec3 b\u1ea3o v\u1ec7 ch\u1ed1ng l\u1ea1i c\u00e1c s\u1ef1 c\u1ed1 ph\u00e1t tri\u1ec3n tr\u00ean ch\u00ednh d\u00e2y d\u1eabn trung t\u00ednh.<\/strong> N\u1ebfu d\u00e2y trung t\u00ednh b\u1ecb h\u1ecfng v\u00e0 mang d\u00f2ng \u0111i\u1ec7n tr\u1edf v\u1ec1 m\u1ed9t c\u00e1ch b\u1ea5t ng\u1edd, c\u1ea7u dao 1P s\u1ebd kh\u00f4ng ph\u00e1t hi\u1ec7n ra t\u00ecnh tr\u1ea1ng qu\u00e1 t\u1ea3i n\u00e0y. \u0110\u00e2y l\u00e0 l\u00fd do t\u1ea1i sao c\u00e1c quy t\u1eafc v\u1ec1 \u0111i\u1ec7n hi\u1ec7n \u0111\u1ea1i ng\u00e0y c\u00e0ng b\u1eaft bu\u1ed9c gi\u00e1m s\u00e1t trung t\u00ednh trong c\u00e1c h\u1ec7 th\u1ed1ng c\u00f3 th\u1ec3 c\u00f3 s\u00f3ng h\u00e0i ho\u1eb7c t\u1ea3i kh\u00f4ng c\u00e2n b\u1eb1ng.<\/p>\n<h2>1P+N (M\u1ed9t c\u1ef1c + Trung t\u00ednh): Ti\u00eau chu\u1ea9n hi\u1ec7n \u0111\u1ea1i<\/h2>\n<p>\u0110\u00e2y l\u00e0 n\u01a1i s\u1ef1 nh\u1ea7m l\u1eabn b\u1eaft \u0111\u1ea7u\u2014v\u00e0 n\u01a1i hi\u1ec3u ti\u00eau chu\u1ea9n IEC tr\u1edf n\u00ean c\u1ea7n thi\u1ebft cho c\u00e1c d\u1ef1 \u00e1n qu\u1ed1c t\u1ebf. <strong>C\u1ea7u dao 1P+N (c\u00f2n \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 DPN trong c\u00e1c t\u00e0i li\u1ec7u c\u0169) chuy\u1ec3n m\u1ea1ch \u0111\u1ed3ng th\u1eddi c\u1ea3 d\u00e2y pha v\u00e0 d\u00e2y trung t\u00ednh nh\u01b0ng ch\u1ec9 cung c\u1ea5p b\u1ea3o v\u1ec7 qu\u00e1 d\u00f2ng cho pha<\/strong>.<\/p>\n<h3>S\u1ef1 kh\u00e1c bi\u1ec7t quan tr\u1ecdng: Chuy\u1ec3n m\u1ea1ch so v\u1edbi B\u1ea3o v\u1ec7<\/h3>\n<p>\u0110\u00e2y l\u00e0 kh\u00eda c\u1ea1nh b\u1ecb hi\u1ec3u l\u1ea7m nhi\u1ec1u nh\u1ea5t c\u1ee7a c\u00f4ng ngh\u1ec7 1P+N:<\/p>\n<table border=\"1\" cellpadding=\"10\" cellspacing=\"0\" style=\"border-collapse: collapse; width: 100%; margin: 20px 0; border: 1px solid #ddd;\">\n<thead style=\"background-color: #f5f5f5;\">\n<tr>\n<th>Ch\u1ee9c n\u0103ng<\/th>\n<th>1P<\/th>\n<th>1P+N<\/th>\n<th>2P<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td><strong>Chuy\u1ec3n m\u1ea1ch pha<\/strong><\/td>\n<td>Yes<\/td>\n<td>Yes<\/td>\n<td>Yes<\/td>\n<\/tr>\n<tr>\n<td><strong>Chuy\u1ec3n m\u1ea1ch trung t\u00ednh<\/strong><\/td>\n<td>Kh\u00f4ng c\u00f3<\/td>\n<td><strong>Yes<\/strong><\/td>\n<td>Yes<\/td>\n<\/tr>\n<tr>\n<td><strong>B\u1ea3o v\u1ec7 pha<\/strong><\/td>\n<td>Yes<\/td>\n<td>Yes<\/td>\n<td>Yes<\/td>\n<\/tr>\n<tr>\n<td><strong>B\u1ea3o v\u1ec7 trung t\u00ednh<\/strong><\/td>\n<td>Kh\u00f4ng c\u00f3<\/td>\n<td>Kh\u00f4ng c\u00f3<\/td>\n<td><strong>Yes<\/strong><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>C\u1ea7u dao 1P+N <strong>chuy\u1ec3n m\u1ea1ch (ng\u1eaft k\u1ebft n\u1ed1i) d\u00e2y trung t\u00ednh \u0111\u1ec3 c\u00e1ch ly b\u1ea3o tr\u00ec<\/strong> nh\u01b0ng kh\u00f4ng <strong>kh\u00f4ng<\/strong> bao g\u1ed3m m\u1ed9t c\u1ea3m bi\u1ebfn nhi\u1ec7t t\u1eeb theo d\u00f5i d\u00e2y trung t\u00ednh. S\u1ef1 kh\u00e1c bi\u1ec7t n\u00e0y c\u00f3 nh\u1eefng \u00fd ngh\u0129a s\u00e2u s\u1eafc:<\/p>\n<p><strong>T\u00ecnh hu\u1ed1ng: T\u1ea1i sao chuy\u1ec3n m\u1ea1ch trung t\u00ednh l\u1ea1i quan tr\u1ecdng<\/strong><\/p>\n<p>Trong qu\u00e1 tr\u00ecnh b\u1ea3o tr\u00ec, m\u1ed9t th\u1ee3 \u0111i\u1ec7n l\u00e0m vi\u1ec7c tr\u00ean m\u1ed9t m\u1ea1ch \u0111\u01b0\u1ee3c b\u1ea3o v\u1ec7 b\u1eb1ng 1P+N. V\u1edbi c\u1ea7u dao 1P, vi\u1ec7c l\u1eadt c\u00f4ng t\u1eafc s\u1ebd khi\u1ebfn d\u00e2y d\u1eabn trung t\u00ednh v\u1eabn \u0111\u01b0\u1ee3c k\u1ebft n\u1ed1i v\u1edbi ngu\u1ed3n cung c\u1ea5p. N\u1ebfu s\u1ef1 c\u1ed1 trung t\u00ednh c\u1ee7a m\u1ed9t m\u1ea1ch kh\u00e1c v\u00f4 t\u00ecnh \u0111\u1eb7t \u0111i\u1ec7n \u00e1p l\u00ean d\u00e2y trung t\u00ednh n\u00e0y, th\u1ee3 \u0111i\u1ec7n ch\u1ea1m v\u00e0o d\u00e2y trung t\u00ednh \u201c\u0111\u00e3 t\u1eaft\u201d c\u00f3 th\u1ec3 b\u1ecb \u0111i\u1ec7n gi\u1eadt ch\u1ebft ng\u01b0\u1eddi. V\u1edbi c\u1ea7u dao 1P+N, c\u1ea3 pha v\u00e0 trung t\u00ednh \u0111\u1ec1u b\u1ecb ng\u1eaft k\u1ebft n\u1ed1i v\u1eadt l\u00fd, ng\u0103n ng\u1eeba ho\u00e0n to\u00e0n m\u1ed1i nguy hi\u1ec3m n\u00e0y.<\/p>\n<h3>Khi n\u00e0o b\u1ea3o v\u1ec7 trung t\u00ednh tr\u1edf n\u00ean b\u1eaft bu\u1ed9c<\/h3>\n<p>Trong khi 1P+N cung c\u1ea5p chuy\u1ec3n m\u1ea1ch, <strong>d\u00e2y trung t\u00ednh <em>s\u1ef1 b\u1ea3o v\u1ec7<\/em> (gi\u00e1m s\u00e1t)<\/strong> tr\u1edf n\u00ean c\u1ea7n thi\u1ebft trong c\u00e1c t\u00ecnh hu\u1ed1ng r\u1ee7i ro cao c\u1ee5 th\u1ec3:<\/p>\n<p><strong>1. Ti\u1ebft di\u1ec7n d\u00e2y trung t\u00ednh gi\u1ea3m<\/strong><\/p>\n<p>Theo IEC 60364-4-43, n\u1ebfu di\u1ec7n t\u00edch m\u1eb7t c\u1eaft ngang c\u1ee7a d\u00e2y d\u1eabn trung t\u00ednh nh\u1ecf h\u01a1n d\u00e2y d\u1eabn pha, th\u00ec b\u1ea3o v\u1ec7 ph\u1ea3i theo d\u00f5i d\u00e2y trung t\u00ednh. C\u00e1c d\u00e2y d\u1eabn nh\u1ecf h\u01a1n qu\u00e1 n\u00f3ng nhanh h\u01a1n v\u00e0 vi\u1ec7c ch\u1ec9 theo d\u00f5i pha kh\u00f4ng th\u1ec3 ph\u00e1t hi\u1ec7n ra t\u00ecnh tr\u1ea1ng qu\u00e1 t\u1ea3i n\u00e0y.<\/p>\n<p><strong>V\u00ed d\u1ee5<\/strong>: D\u00e2y pha 10mm\u00b2 v\u1edbi d\u00e2y trung t\u00ednh 4mm\u00b2. N\u1ebfu d\u00f2ng \u0111i\u1ec7n tr\u1edf v\u1ec1 v\u01b0\u1ee3t qu\u00e1 m\u1ee9c m\u00e0 d\u00e2y trung t\u00ednh nh\u1ecf h\u01a1n c\u00f3 th\u1ec3 mang m\u1ed9t c\u00e1ch an to\u00e0n, th\u00ec n\u1ebfu kh\u00f4ng c\u00f3 gi\u00e1m s\u00e1t trung t\u00ednh, n\u00f3 s\u1ebd qu\u00e1 n\u00f3ng m\u00e0 kh\u00f4ng b\u1ecb ph\u00e1t hi\u1ec7n. C\u1ea7u dao 2P ho\u1eb7c 1P+N \u0111\u01b0\u1ee3c b\u1ea3o v\u1ec7 trung t\u00ednh th\u1ef1c s\u1ef1 s\u1ebd ph\u00e1t hi\u1ec7n ra \u0111i\u1ec1u n\u00e0y.<\/p>\n<p><strong>2. D\u00f2ng \u0111i\u1ec7n h\u00e0i trong c\u00e1c c\u01a1 s\u1edf hi\u1ec7n \u0111\u1ea1i<\/strong><\/p>\n<figure style=\"text-align: center; margin: 20px 0;\">\n        <img decoding=\"async\" src=\"https:\/\/img.viox.com\/Technical-diagram-comparing-neutral-current-in-linear-loads-minimal-versus-non-linear-loads-with-harmonics-excessive-illustrating-why-neutral-protection-is-critical-in-modern-commercial-installations-using-VIOX-circuit-breakers.webp\" alt=\"Technical diagram comparing neutral current in linear vs non-linear loads showing harmonic impact\" style=\"max-width: 100%; height: auto;\"><figcaption style=\"font-style: italic; margin-top: 8px; color: #555;\">H\u00ecnh 3: S\u01a1 \u0111\u1ed3 k\u1ef9 thu\u1eadt t\u01b0\u01a1ng ph\u1ea3n d\u00f2ng \u0111i\u1ec7n trung t\u00ednh t\u1ed1i thi\u1ec3u trong t\u1ea3i tuy\u1ebfn t\u00ednh v\u1edbi d\u00f2ng \u0111i\u1ec7n h\u00e0i qu\u00e1 m\u1ee9c trong t\u1ea3i phi tuy\u1ebfn t\u00ednh (\u0111\u00e8n LED, VFD), minh h\u1ecda l\u00fd do t\u1ea1i sao b\u1ea3o v\u1ec7 2P ho\u1eb7c 4P l\u1ea1i quan tr\u1ecdng trong c\u00e1c l\u1eafp \u0111\u1eb7t hi\u1ec7n \u0111\u1ea1i.<\/figcaption><\/figure>\n<p>Trong c\u00e1c t\u00f2a nh\u00e0 v\u0103n ph\u00f2ng, trung t\u00e2m d\u1eef li\u1ec7u v\u00e0 nh\u00e0 b\u1ebfp th\u01b0\u01a1ng m\u1ea1i c\u00f3 \u0111\u00e8n LED, \u1ed5 \u0111\u0129a t\u1ea7n s\u1ed1 thay \u0111\u1ed5i v\u00e0 thi\u1ebft b\u1ecb m\u00e1y t\u00ednh, <strong>t\u1ea3i phi tuy\u1ebfn t\u00ednh t\u1ea1o ra d\u00f2ng \u0111i\u1ec7n h\u00e0i<\/strong>. H\u00e0i s\u00f3ng b\u1eadc 3 (v\u00e0 c\u00e1c h\u00e0i s\u00f3ng l\u1ebb kh\u00e1c) kh\u00f4ng tri\u1ec7t ti\u00eau l\u1eabn nhau trong d\u00e2y trung t\u00ednh nh\u01b0 trong d\u00e2y pha. N\u1ebfu th\u00e0nh ph\u1ea7n h\u00e0i v\u01b0\u1ee3t qu\u00e1 15\u201333% d\u00f2ng \u0111i\u1ec7n pha, d\u00e2y trung t\u00ednh th\u1ef1c t\u1ebf c\u00f3 th\u1ec3 mang <em>h\u01a1n<\/em> d\u00f2ng \u0111i\u1ec7n l\u1edbn h\u01a1n d\u00e2y pha.<\/p>\n<p><strong>V\u00ed d\u1ee5 th\u1ef1c t\u1ebf<\/strong>: M\u1ed9t b\u1ebfp \u0103n c\u00f4ng nghi\u1ec7p v\u1edbi 20 b\u1ebfp t\u1eeb (t\u1ea3i phi tuy\u1ebfn t\u00ednh cao). D\u00e2y trung t\u00ednh c\u1ee7a \u0111\u01b0\u1eddng d\u00e2y 3P+N c\u00f3 th\u1ec3 mang 150A trong khi m\u1ed7i pha ch\u1ec9 mang 100A. Gi\u00e1m s\u00e1t pha ti\u00eau chu\u1ea9n b\u1ecf s\u00f3t d\u00e2y trung t\u00ednh qu\u00e1 nhi\u1ec7t. C\u00e1c ti\u00eau chu\u1ea9n hi\u1ec7n \u0111\u1ea1i hi\u1ec7n y\u00eau c\u1ea7u b\u1ea3o v\u1ec7 4P trong c\u00e1c tr\u01b0\u1eddng h\u1ee3p nh\u01b0 v\u1eady.<\/p>\n<p><strong>3. H\u1ec7 th\u1ed1ng n\u1ed1i \u0111\u1ea5t TT v\u00e0 IT<\/strong><\/p>\n<p>H\u1ec7 th\u1ed1ng n\u1ed1i \u0111\u1ea5t thay \u0111\u1ed5i c\u01a1 b\u1ea3n c\u00e1c y\u00eau c\u1ea7u b\u1ea3o v\u1ec7 trung t\u00ednh:<\/p>\n<ul>\n<li><strong>H\u1ec7 th\u1ed1ng TN-S<\/strong> (ph\u1ed5 bi\u1ebfn \u1edf Ch\u00e2u \u00c2u): D\u00e2y trung t\u00ednh \u0111\u01b0\u1ee3c n\u1ed1i \u0111\u1ea5t \u0111\u00e1ng tin c\u1eady t\u1ea1i m\u00e1y bi\u1ebfn \u00e1p. 1P+N th\u01b0\u1eddng \u0111\u1ee7 \u0111\u1ec3 c\u00e1ch ly trong qu\u00e1 tr\u00ecnh b\u1ea3o tr\u00ec.<\/li>\n<li><strong>H\u1ec7 th\u1ed1ng TT<\/strong>: D\u00e2y trung t\u00ednh kh\u00f4ng \u0111\u01b0\u1ee3c n\u1ed1i v\u1edbi \u0111\u1ea5t c\u1ee7a c\u01a1 s\u1edf, v\u00ec v\u1eady kh\u00f4ng th\u1ec3 coi l\u00e0 \u201can to\u00e0n\u201d. N\u00ean s\u1eed d\u1ee5ng b\u1ea3o v\u1ec7 2P \u0111\u1ea7y \u0111\u1ee7.<\/li>\n<li><strong>H\u1ec7 th\u1ed1ng IT<\/strong>: D\u00e2y trung t\u00ednh \u0111\u01b0\u1ee3c c\u00e1ch ly kh\u1ecfi \u0111\u1ea5t. M\u1ed9t <strong>C\u1ea7u dao 2P l\u00e0 b\u1eaft bu\u1ed9c<\/strong> v\u00ec c\u00e1c s\u1ef1 c\u1ed1 ch\u1ea1m \u0111\u1ea5t trung t\u00ednh l\u00e0 ph\u1ed5 bi\u1ebfn v\u00e0 t\u1ea1o ra d\u00f2ng \u0111i\u1ec7n s\u1ef1 c\u1ed1 nguy hi\u1ec3m trong d\u00e2y trung t\u00ednh.<\/li>\n<\/ul>\n<h3>\u01afu \u0111i\u1ec3m c\u1ee7a 1P+N so v\u1edbi 1P<\/h3>\n<ul>\n<li>\u2713 C\u00e1ch ly ho\u00e0n to\u00e0n m\u1ea1ch trong qu\u00e1 tr\u00ecnh b\u1ea3o tr\u00ec (d\u00e2y trung t\u00ednh \u0111\u01b0\u1ee3c ng\u1eaft)<\/li>\n<li>\u2713 Ng\u0103n ng\u1eeba nguy c\u01a1 \u0111i\u1ec7n gi\u1eadt t\u1eeb c\u00e1c s\u1ef1 c\u1ed1 ch\u1ea1m \u0111\u1ea5t trung t\u00ednh tr\u00ean c\u00e1c m\u1ea1ch h\u1ea1 ngu\u1ed3n<\/li>\n<li>\u2713 \u0110\u00e1p \u1ee9ng c\u00e1c ti\u00eau chu\u1ea9n Ch\u00e2u \u00c2u v\u00e0 IEC v\u1ec1 th\u1ef1c h\u00e0nh b\u1ea3o tr\u00ec an to\u00e0n<\/li>\n<li>\u2713 Chi\u1ec1u r\u1ed9ng ray DIN t\u01b0\u01a1ng t\u1ef1 nh\u01b0 1P (18mm), do \u0111\u00f3 chi ph\u00ed t\u0103ng l\u00ean l\u00e0 t\u1ed1i thi\u1ec3u<\/li>\n<li>\u2713 Ng\u00e0y c\u00e0ng b\u1eaft bu\u1ed9c trong c\u00e1c l\u1eafp \u0111\u1eb7t th\u01b0\u01a1ng m\u1ea1i hi\u1ec7n \u0111\u1ea1i<\/li>\n<\/ul>\n<h3>Khi 1P+N kh\u00f4ng \u0111\u1ee7<\/h3>\n<ul>\n<li>D\u00f2ng \u0111i\u1ec7n h\u00e0i v\u01b0\u1ee3t qu\u00e1 15% d\u00f2ng \u0111i\u1ec7n pha (s\u1eed d\u1ee5ng 2P ho\u1eb7c b\u1ea3o v\u1ec7 trung t\u00ednh)<\/li>\n<li>D\u00e2y trung t\u00ednh c\u00f3 k\u00edch th\u01b0\u1edbc nh\u1ecf h\u01a1n so v\u1edbi pha<\/li>\n<li>H\u1ec7 th\u1ed1ng n\u1ed1i \u0111\u1ea5t IT (ph\u1ea3i s\u1eed d\u1ee5ng 2P)<\/li>\n<li>C\u00e1c \u1ee9ng d\u1ee5ng c\u00f3 \u0111\u1ed9 tin c\u1eady cao, n\u01a1i c\u1ea7n gi\u00e1m s\u00e1t \u0111\u1ea7y \u0111\u1ee7 d\u00e2y d\u1eabn<\/li>\n<\/ul>\n<h2>C\u1ea7u dao 2P (Hai c\u1ef1c): B\u1ea3o v\u1ec7 \u0111\u1ea7y \u0111\u1ee7<\/h2>\n<p>Nh\u1eefng <strong>C\u1ea7u dao 2P cung c\u1ea5p b\u1ea3o v\u1ec7 \u0111\u1ed1i x\u1ee9ng<\/strong> tr\u00ean c\u1ea3 hai d\u00e2y d\u1eabn\u2014th\u01b0\u1eddng l\u00e0 c\u1ea3 hai d\u00e2y pha trong m\u1ea1ch m\u1ed9t pha 240V, ho\u1eb7c m\u1ed9t pha v\u00e0 m\u1ed9t trung t\u00ednh trong c\u00e1c \u1ee9ng d\u1ee5ng chuy\u00ean d\u1ee5ng. M\u1ed7i c\u1ef1c ch\u1ee9a c\u00e1c ph\u1ea7n t\u1eed nhi\u1ec7t v\u00e0 t\u1eeb \u0111\u1ed9c l\u1eadp.<\/p>\n<figure style=\"text-align: center; margin: 20px 0;\">\n        <img decoding=\"async\" src=\"https:\/\/img.viox.com\/Industrial-electrical-control-panel-showing-VIOX-single-pole-single-pole-with-neutral-and-double-pole-circuit-breakers-installed-on-DIN-rails-with-organized-copper-bus-bars-and-color-coded-wiring.webp\" alt=\"Industrial electrical control panel showing VIOX breakers installed on DIN rails\" style=\"max-width: 100%; height: auto;\"><figcaption style=\"font-style: italic; margin-top: 8px; color: #555;\">H\u00ecnh 4: \u1ee8ng d\u1ee5ng b\u1ea3ng \u0111i\u1ec1u khi\u1ec3n c\u00f4ng nghi\u1ec7p VIOX c\u00f3 c\u00e1c c\u1ea5u h\u00ecnh c\u1ea7u dao kh\u00e1c nhau (1P, 1P+N v\u00e0 2P) \u0111\u01b0\u1ee3c s\u1eafp x\u1ebfp tr\u00ean ray DIN v\u1edbi thanh c\u00e1i \u0111\u1ed3ng.<\/figcaption><\/figure>\n<h3>Th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt<\/h3>\n<ul>\n<li><strong>\u0110i\u1ec7n \u0110\u00e1nh Gi\u00e1<\/strong>: 240V AC (US) ho\u1eb7c 230V AC (c\u00f3 th\u1ec3 l\u00e0 2 pha ho\u1eb7c pha+trung t\u00ednh trong IEC)<\/li>\n<li><strong>\u0110\u00e1nh Gi\u00e1 C\u1ee7a Hi\u1ec7n T\u1ea1i<\/strong>: 20A \u0111\u1ebfn 100A \u0111i\u1ec3n h\u00ecnh cho d\u00e2n d\u1ee5ng; l\u00ean \u0111\u1ebfn 1600A+ cho c\u00f4ng nghi\u1ec7p<\/li>\n<li><strong>Chi\u1ec1u r\u1ed9ng module<\/strong>: 2 module (36mm)<\/li>\n<li><strong>Kh\u1ea3 N\u0103ng Ph\u00e1 V\u1ee1<\/strong>: 10kA \u0111\u1ebfn 100kA t\u00f9y thu\u1ed9c v\u00e0o d\u00f2ng<\/li>\n<li><strong>S\u1ed1 l\u01b0\u1ee3ng d\u00e2y d\u1eabn \u0111\u01b0\u1ee3c b\u1ea3o v\u1ec7<\/strong>: 2 (c\u1ea3 hai d\u00e2y pha, ho\u1eb7c pha+trung t\u00ednh)<\/li>\n<\/ul>\n<h3>C\u00e1ch th\u1ee9c ho\u1ea1t \u0111\u1ed9ng c\u1ee7a b\u1ea3o v\u1ec7 2P<\/h3>\n<p>Trong m\u1ed9t l\u1eafp \u0111\u1eb7t d\u00e2n d\u1ee5ng 240V \u1edf Hoa K\u1ef3, c\u1ea7u dao 2P k\u1ebft n\u1ed1i v\u1edbi hai nh\u00e1nh pha ri\u00eang bi\u1ec7t c\u1ee7a ngu\u1ed3n \u0111i\u1ec7n ch\u00ednh (L1 v\u00e0 L2), m\u1ed7i nh\u00e1nh 120V so v\u1edbi trung t\u00ednh. C\u1ea7u dao gi\u00e1m s\u00e1t c\u1ea3 hai d\u00e2y d\u1eabn v\u1ec1 qu\u00e1 d\u00f2ng:<\/p>\n<ul>\n<li>N\u1ebfu m\u1ed9t trong hai nh\u00e1nh qu\u00e1 t\u1ea3i, <strong>c\u1ea3 hai c\u1ef1c s\u1ebd t\u00e1c \u0111\u1ed9ng \u0111\u1ed3ng th\u1eddi<\/strong> (li\u00ean k\u1ebft c\u01a1 h\u1ecdc)<\/li>\n<li>C\u1ea3 hai d\u00e2y d\u1eabn \u0111\u1ec1u b\u1ecb ng\u1eaft ho\u00e0n to\u00e0n, \u0111\u1ea3m b\u1ea3o kh\u00f4ng c\u00f2n \u0111i\u1ec7n \u00e1p tr\u00ean m\u1ea1ch<\/li>\n<\/ul>\n<p>Trong c\u00e1c \u1ee9ng d\u1ee5ng IEC, n\u01a1i 2P c\u00f3 th\u1ec3 b\u1ea3o v\u1ec7 pha+trung t\u00ednh, c\u1ea3 hai d\u00e2y d\u1eabn \u0111\u1ec1u nh\u1eadn \u0111\u01b0\u1ee3c gi\u00e1m s\u00e1t v\u00e0 chuy\u1ec3n m\u1ea1ch gi\u1ed1ng h\u1ec7t nhau.<\/p>\n<h3>\u0110i\u1ec3n H\u00ecnh \u1ee8ng D\u1ee5ng<\/h3>\n<ul>\n<li><strong>240V d\u00e2n d\u1ee5ng Hoa K\u1ef3<\/strong>: B\u1ebfp \u0111i\u1ec7n, m\u00e1y s\u1ea5y, m\u00e1y n\u01b0\u1edbc n\u00f3ng, m\u00e1y \u0111i\u1ec1u h\u00f2a kh\u00f4ng kh\u00ed, b\u1ed9 s\u1ea1c xe \u0111i\u1ec7n<\/li>\n<li><strong>2 pha c\u00f4ng nghi\u1ec7p<\/strong>: M\u00e1y bi\u1ebfn \u00e1p h\u1ea1 \u00e1p, c\u00e1c \u1ee9ng d\u1ee5ng \u0111\u1ed9ng c\u01a1 chuy\u00ean d\u1ee5ng<\/li>\n<li><strong>Ng\u1eaft m\u1ea1ch ch\u00ednh<\/strong>: Th\u01b0\u1eddng s\u1eed d\u1ee5ng 2P ho\u1eb7c l\u1edbn h\u01a1n \u0111\u1ec3 c\u00e1ch ly ho\u00e0n to\u00e0n h\u1ec7 th\u1ed1ng<\/li>\n<li><strong>M\u1ea1ch c\u00f3 \u0111\u1ed9 tin c\u1eady cao<\/strong>: N\u01a1i \u01b0u ti\u00ean b\u1ea3o v\u1ec7 \u0111\u1ed1i x\u1ee9ng<\/li>\n<\/ul>\n<h3>2P so v\u1edbi 1P+N \u0111\u1ec3 b\u1ea3o v\u1ec7 trung t\u00ednh<\/h3>\n<p>M\u1ed9t c\u00e2u h\u1ecfi th\u01b0\u1eddng g\u1eb7p: \u201cT\u00f4i c\u00f3 n\u00ean s\u1eed d\u1ee5ng 2P thay v\u00ec 1P+N \u0111\u1ec3 b\u1ea3o v\u1ec7 trung t\u00ednh t\u1ed1t h\u01a1n kh\u00f4ng?\u201d<\/p>\n<p><strong>C\u00e2u tr\u1ea3 l\u1eddi ph\u1ee5 thu\u1ed9c v\u00e0o h\u1ec7 th\u1ed1ng n\u1ed1i \u0111\u1ea5t v\u00e0 lo\u1ea1i t\u1ea3i c\u1ee7a b\u1ea1n<\/strong>:<\/p>\n<ul>\n<li><strong>S\u1eed d\u1ee5ng 1P+N trong h\u1ec7 th\u1ed1ng TN-S<\/strong> v\u1edbi t\u1ea3i tuy\u1ebfn t\u00ednh (chi\u1ebfu s\u00e1ng, s\u01b0\u1edfi \u1ea5m). N\u00f3 cung c\u1ea5p chuy\u1ec3n m\u1ea1ch c\u1ea7n thi\u1ebft v\u1edbi chi ph\u00ed t\u1ed1i thi\u1ec3u.<\/li>\n<li><strong>S\u1eed d\u1ee5ng 2P (ho\u1eb7c 4P trong 3 pha)<\/strong> khi c\u00f3 s\u00f3ng h\u00e0i, t\u1ea3i kh\u00f4ng c\u00e2n b\u1eb1ng ho\u1eb7c b\u1ea1n v\u1eadn h\u00e0nh theo n\u1ed1i \u0111\u1ea5t IT.<\/li>\n<li><strong>S\u1eed d\u1ee5ng 2P l\u00e0m b\u1ea3o v\u1ec7 \u0111\u01b0\u1eddng d\u00e2y ch\u00ednh<\/strong> b\u1ea5t k\u1ec3, \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o c\u00e1ch ly ho\u00e0n to\u00e0n trong qu\u00e1 tr\u00ecnh b\u1ea3o tr\u00ec.<\/li>\n<\/ul>\n<h2>B\u1ea3ng so s\u00e1nh to\u00e0n di\u1ec7n<\/h2>\n<table border=\"1\" cellpadding=\"10\" cellspacing=\"0\" style=\"border-collapse: collapse; width: 100%; margin: 20px 0; border: 1px solid #ddd;\">\n<thead style=\"background-color: #f5f5f5;\">\n<tr>\n<th>N\u0103ng<\/th>\n<th>1P<\/th>\n<th>1P+N<\/th>\n<th>2P<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td><strong>B\u1ea3o v\u1ec7 pha<\/strong><\/td>\n<td>Yes<\/td>\n<td>Yes<\/td>\n<td>Yes<\/td>\n<\/tr>\n<tr>\n<td><strong>Trung L\u1eadp B\u1ea3o V\u1ec7<\/strong><\/td>\n<td>Kh\u00f4ng c\u00f3<\/td>\n<td>Kh\u00f4ng c\u00f3<\/td>\n<td>Yes<\/td>\n<\/tr>\n<tr>\n<td><strong>Chuy\u1ec3n m\u1ea1ch trung t\u00ednh<\/strong><\/td>\n<td>Kh\u00f4ng c\u00f3<\/td>\n<td><strong>Yes<\/strong><\/td>\n<td>Yes<\/td>\n<\/tr>\n<tr>\n<td><strong>\u0110i\u1ec7n \u00e1p \u0111i\u1ec3n h\u00ecnh<\/strong><\/td>\n<td>120V ho\u1eb7c 230V<\/td>\n<td>230V<\/td>\n<td>240V (US) ho\u1eb7c 2 pha IEC<\/td>\n<\/tr>\n<tr>\n<td><strong>Chi\u1ec1u r\u1ed9ng module<\/strong><\/td>\n<td>1 (18mm)<\/td>\n<td>1 (18mm)<\/td>\n<td>2 (36mm)<\/td>\n<\/tr>\n<tr>\n<td><strong>Kh\u1ea3 N\u0103ng Ph\u00e1 V\u1ee1<\/strong><\/td>\n<td>6-10kA<\/td>\n<td>6-10kA<\/td>\n<td>10-100kA+<\/td>\n<\/tr>\n<tr>\n<td><strong>Chi Ph\u00ed Kho\u1ea3ng<\/strong><\/td>\n<td>\u20ac3-8<\/td>\n<td>\u20ac4-10<\/td>\n<td>\u20ac8-25<\/td>\n<\/tr>\n<tr>\n<td><strong>Th\u00edch h\u1ee3p cho s\u00f3ng h\u00e0i<\/strong><\/td>\n<td>\u26a0\ufe0f H\u1ea1n ch\u1ebf<\/td>\n<td>\u26a0\ufe0f H\u1ea1n ch\u1ebf<\/td>\n<td>\u2713 C\u00f3 (v\u1edbi 4P cho 3 pha)<\/td>\n<\/tr>\n<tr>\n<td><strong>H\u1ec7 th\u1ed1ng TN-S<\/strong><\/td>\n<td>Ch\u1ea5p nh\u1eadn \u0111\u01b0\u1ee3c<\/td>\n<td>\u01afu ti\u00ean<\/td>\n<td>Ch\u1ec9 \u0111\u1ecbnh th\u1eeba<\/td>\n<\/tr>\n<tr>\n<td><strong>H\u1ec7 th\u1ed1ng TT<\/strong><\/td>\n<td>Kh\u00f4ng khuy\u1ebfn kh\u00edch<\/td>\n<td>Ch\u1ea5p nh\u1eadn \u0111\u01b0\u1ee3c<\/td>\n<td>\u0110\u1ec1 ngh\u1ecb<\/td>\n<\/tr>\n<tr>\n<td><strong>H\u1ec7 th\u1ed1ng IT<\/strong><\/td>\n<td>Kh\u00f4ng ph\u00f9 h\u1ee3p<\/td>\n<td>Kh\u00f4ng ph\u00f9 h\u1ee3p<\/td>\n<td>\u2713 B\u1eaft bu\u1ed9c<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<hr style=\"border: 0; border-top: 1px solid #ddd; margin: 30px 0;\">\n<h2>Khung l\u1ef1a ch\u1ecdn: C\u00e1ch ch\u1ecdn<\/h2>\n<p>Vi\u1ec7c ch\u1ecdn c\u1ea5u h\u00ecnh c\u1ef1c ph\u00f9 h\u1ee3p \u0111\u00f2i h\u1ecfi ph\u1ea3i \u0111\u00e1nh gi\u00e1 b\u1ed1n y\u1ebfu t\u1ed1:<\/p>\n<figure style=\"text-align: center; margin: 20px 0;\">\n        <img decoding=\"async\" src=\"https:\/\/img.viox.com\/IEC-single-line-electrical-diagram-showing-typical-applications-of-VIOX-1P-residential-lighting-1PN-general-receptacles-and-2P-heavy-load-circuit-breakers.webp\" alt=\"IEC single line diagram showing applications for VIOX 1P, 1P+N, and 2P breakers\" style=\"max-width: 100%; height: auto;\"><figcaption style=\"font-style: italic; margin-top: 8px; color: #555;\">H\u00ecnh 5: S\u01a1 \u0111\u1ed3 \u0111\u01a1n tuy\u1ebfn IEC minh h\u1ecda c\u00e1c t\u00ecnh hu\u1ed1ng \u1ee9ng d\u1ee5ng \u0111i\u1ec3n h\u00ecnh: 1P cho chi\u1ebfu s\u00e1ng d\u00e2n d\u1ee5ng, 1P+N cho \u1ed5 c\u1eafm th\u00f4ng th\u01b0\u1eddng v\u00e0 2P cho t\u1ea3i n\u1eb7ng.<\/figcaption><\/figure>\n<h3>B\u01b0\u1edbc 1: X\u00e1c \u0111\u1ecbnh lo\u1ea1i h\u1ec7 th\u1ed1ng c\u1ee7a b\u1ea1n<\/h3>\n<ul>\n<li><strong>D\u00e2n d\u1ee5ng m\u1ed9t pha 120V\/240V<\/strong> (B\u1eafc M\u1ef9): Ch\u1ecdn gi\u1eefa 1P (chi\u1ebfu s\u00e1ng) v\u00e0 2P (thi\u1ebft b\u1ecb c\u00f4ng su\u1ea5t cao)<\/li>\n<li><strong>D\u00e2n d\u1ee5ng m\u1ed9t pha 230V<\/strong> (Ch\u00e2u \u00c2u\/IEC): Ch\u1ecdn 1P (chi\u1ebfu s\u00e1ng, t\u1ea3i nh\u1ecf) ho\u1eb7c 1P+N (t\u1ea5t c\u1ea3 c\u00e1c m\u1ea1ch)<\/li>\n<li><strong>H\u1ec7 th\u1ed1ng ba pha<\/strong>: C\u00e2n nh\u1eafc 3P, 3P+N ho\u1eb7c 4P d\u1ef1a tr\u00ean r\u1ee7i ro d\u00f2ng trung t\u00ednh (\u0111\u01b0\u1ee3c \u0111\u1ec1 c\u1eadp trong c\u00e1c b\u00e0i vi\u1ebft li\u00ean quan)<\/li>\n<\/ul>\n<h3>B\u01b0\u1edbc 2: X\u00e1c \u0111\u1ecbnh h\u1ec7 th\u1ed1ng n\u1ed1i \u0111\u1ea5t &amp; Y\u00eau c\u1ea7u b\u1ea3o tr\u00ec<\/h3>\n<ul>\n<li><strong>TN-S<\/strong>: 1P ch\u1ea5p nh\u1eadn \u0111\u01b0\u1ee3c cho chi\u1ebfu s\u00e1ng; 1P+N cho c\u00e1c m\u1ea1ch th\u00f4ng th\u01b0\u1eddng<\/li>\n<li><strong>TT<\/strong>: 1P+N b\u1eaft bu\u1ed9c t\u1ed1i thi\u1ec3u; 2P \u0111\u01b0\u1ee3c khuy\u1ebfn ngh\u1ecb cho c\u00e1c m\u1ea1ch quan tr\u1ecdng<\/li>\n<li><strong>IT<\/strong>: 2P b\u1eaft bu\u1ed9c cho t\u1ea5t c\u1ea3 c\u00e1c m\u1ea1ch<\/li>\n<\/ul>\n<h3>B\u01b0\u1edbc 3: \u0110\u00e1nh gi\u00e1 \u0111\u1eb7c t\u00ednh t\u1ea3i<\/h3>\n<ul>\n<li><strong>T\u1ea3i tuy\u1ebfn t\u00ednh<\/strong> (gia nhi\u1ec7t \u0111i\u1ec7n tr\u1edf, chi\u1ebfu s\u00e1ng s\u1ee3i \u0111\u1ed1t): 1P ho\u1eb7c 1P+N l\u00e0 \u0111\u1ee7<\/li>\n<li><strong>T\u1ea3i h\u1ed7n h\u1ee3p v\u1edbi thi\u1ebft b\u1ecb \u0111i\u1ec7n t\u1eed<\/strong> (v\u0103n ph\u00f2ng, nh\u00e0 b\u1ebfp): Ki\u1ec3m tra th\u00e0nh ph\u1ea7n s\u00f3ng h\u00e0i\n<ul>\n<li>N\u1ebfu s\u00f3ng h\u00e0i v\u01b0\u1ee3t qu\u00e1 15%, h\u00e3y n\u00e2ng c\u1ea5p l\u00ean 2P ho\u1eb7c 4P (n\u1ebfu l\u00e0 3 pha)<\/li>\n<\/ul>\n<\/li>\n<li><strong>\u0110\u1ed9ng c\u01a1 m\u1ea1ch<\/strong>: Th\u01b0\u1eddng s\u1eed d\u1ee5ng 2P ho\u1eb7c b\u1ed9 ng\u1eaft m\u1ea1ch b\u1ea3o v\u1ec7 \u0111\u1ed9ng c\u01a1 chuy\u00ean d\u1ee5ng<\/li>\n<\/ul>\n<h3>B\u01b0\u1edbc 4: X\u00e1c minh c\u00e1c y\u00eau c\u1ea7u c\u1ee7a quy chu\u1ea9n<\/h3>\n<ul>\n<li><strong>EU (IEC)<\/strong>: \u0110i\u1ec1u 411.3.2.2 th\u01b0\u1eddng b\u1eaft bu\u1ed9c chuy\u1ec3n m\u1ea1ch trung t\u00ednh th\u00f4ng qua 1P+N ho\u1eb7c cao h\u01a1n<\/li>\n<li><strong>US (NEC)<\/strong>: C\u00e1c m\u1ea1ch nh\u00e1nh nhi\u1ec1u d\u00e2y y\u00eau c\u1ea7u ng\u1eaft \u0111\u1ed3ng th\u1eddi (s\u1eed d\u1ee5ng 2P cho 240V)<\/li>\n<li><strong>Ki\u1ec3m tra c\u00e1c s\u1eeda \u0111\u1ed5i c\u1ee5c b\u1ed9<\/strong>: M\u1ed9t s\u1ed1 khu v\u1ef1c ph\u00e1p l\u00fd \u00e1p \u0111\u1eb7t c\u00e1c y\u00eau c\u1ea7u nghi\u00eam ng\u1eb7t h\u01a1n<\/li>\n<\/ul>\n<h2>Nh\u1eefng sai l\u1ea7m th\u01b0\u1eddng g\u1eb7p khi l\u1ef1a ch\u1ecdn c\u1ea7n tr\u00e1nh<\/h2>\n<p>dr. tr\u01b0\u1edbc <strong>Sai l\u1ea7m 1: S\u1eed d\u1ee5ng 1P cho m\u1ea1ch 240V<\/strong><\/p>\n<p>\u0110\u00e2y l\u00e0 l\u1ed7i nguy hi\u1ec3m nh\u1ea5t. M\u1ed9t b\u1ed9 ng\u1eaft m\u1ea1ch 1P tr\u00ean m\u1ea1ch 240V ch\u1ec9 b\u1ea3o v\u1ec7 m\u1ed9t pha, \u0111\u1ec3 d\u00e2y d\u1eabn c\u00f2n l\u1ea1i v\u1eabn c\u00f3 \u0111i\u1ec7n ngay c\u1ea3 khi \u201ct\u1eaft\u201d. \u0110i\u1ec1u n\u00e0y t\u1ea1o ra nguy c\u01a1 \u0111i\u1ec7n gi\u1eadt ch\u1ebft ng\u01b0\u1eddi v\u00e0 vi ph\u1ea1m quy t\u1eafc \u0111i\u1ec7n.<\/p>\n<p>dr. tr\u01b0\u1edbc <strong>Sai l\u1ea7m 2: Cho r\u1eb1ng 1P+N cung c\u1ea5p b\u1ea3o v\u1ec7 trung t\u00ednh<\/strong><\/p>\n<p>Ch\u1eef \u201cN\u201d c\u00f3 ngh\u0129a l\u00e0 chuy\u1ec3n m\u1ea1ch, kh\u00f4ng ph\u1ea3i b\u1ea3o v\u1ec7. Trong m\u00f4i tr\u01b0\u1eddng gi\u00e0u s\u00f3ng h\u00e0i, vi\u1ec7c b\u1ecf qua b\u1ea3o v\u1ec7 trung t\u00ednh th\u1ef1c s\u1ef1 c\u00f3 th\u1ec3 khi\u1ebfn trung t\u00ednh qu\u00e1 n\u00f3ng m\u00e0 kh\u00f4ng b\u1ecb ph\u00e1t hi\u1ec7n.<\/p>\n<p>dr. tr\u01b0\u1edbc <strong>Sai l\u1ea7m 3: Ch\u1ec9 \u0111\u1ecbnh th\u1eeba 2P trong h\u1ec7 th\u1ed1ng TN-S<\/strong><\/p>\n<p>M\u1eb7c d\u00f9 kh\u00f4ng nguy hi\u1ec3m, nh\u01b0ng vi\u1ec7c s\u1eed d\u1ee5ng 2P \u1edf n\u01a1i 1P+N l\u00e0 \u0111\u1ee7 s\u1ebd l\u00e3ng ph\u00ed kh\u00f4ng gian v\u00e0 chi ph\u00ed c\u1ee7a b\u1ea3ng \u0111i\u1ec1u khi\u1ec3n. Tuy nhi\u00ean, vi\u1ec7c s\u1eed d\u1ee5ng 2P cho c\u00e1c \u0111\u01b0\u1eddng c\u1ea5p ngu\u1ed3n ch\u00ednh v\u00e0 c\u00e1c m\u1ea1ch c\u00f3 \u0111\u1ed9 tin c\u1eady cao v\u1eabn l\u00e0 th\u00f4ng l\u1ec7 t\u1ed1t nh\u1ea5t.<\/p>\n<p>dr. tr\u01b0\u1edbc <strong>Sai l\u1ea7m 4: B\u1ecf qua s\u00f3ng h\u00e0i trong t\u01b0\u01a1ng lai<\/strong><\/p>\n<p>M\u1ed9t m\u1ea1ch \u0111\u01b0\u1ee3c l\u1eafp \u0111\u1eb7t cho t\u1ea3i \u0111i\u1ec7n tr\u1edf ng\u00e0y nay c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng l\u1ea1i cho \u0111\u00e8n LED ho\u1eb7c VFD v\u00e0o ng\u00e0y mai. Vi\u1ec7c ch\u1ec9 \u0111\u1ecbnh gi\u00e1m s\u00e1t trung t\u00ednh ngay t\u1eeb \u0111\u1ea7u s\u1ebd ng\u0103n ch\u1eb7n vi\u1ec7c trang b\u1ecb th\u00eam t\u1ed1n k\u00e9m.<\/p>\n<h2>Nh\u1eefng C\u00e2u H\u1ecfi Th\u01b0\u1eddng<\/h2>\n<p><strong>H: T\u00f4i c\u00f3 th\u1ec3 n\u00e2ng c\u1ea5p m\u1ea1ch 1P l\u00ean 1P+N b\u1eb1ng c\u00e1ch l\u1eafp \u0111\u1eb7t m\u1ed9t c\u00f4ng t\u1eafc ng\u1eaft trung t\u00ednh ri\u00eang bi\u1ec7t kh\u00f4ng?<\/strong><br \/>\n    \u0110: Kh\u00f4ng. B\u1ed9 ng\u1eaft m\u1ea1ch v\u00e0 c\u00f4ng t\u1eafc trung t\u00ednh l\u00e0 c\u00e1c thi\u1ebft b\u1ecb ri\u00eang bi\u1ec7t v\u1edbi c\u00e1c \u0111\u1eb7c t\u00ednh ng\u1eaft kh\u00e1c nhau. M\u1ed9t b\u1ed9 ng\u1eaft m\u1ea1ch 1P+N th\u1ef1c s\u1ef1 \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf \u0111\u1eb7c bi\u1ec7t \u0111\u1ec3 ph\u1ed1i h\u1ee3p c\u00e1c ch\u1ee9c n\u0103ng n\u00e0y. Vi\u1ec7c th\u00eam m\u1ed9t c\u00f4ng t\u1eafc ri\u00eang bi\u1ec7t s\u1ebd t\u1ea1o ra c\u00e1c v\u1ea5n \u0111\u1ec1 ph\u1ed1i h\u1ee3p v\u00e0 g\u00e2y nh\u1ea7m l\u1eabn trong qu\u00e1 tr\u00ecnh b\u1ea3o tr\u00ec.<\/p>\n<p><strong>H: \u1ede Hoa K\u1ef3, t\u1ea1i sao m\u1ed9t s\u1ed1 m\u1ea1ch 240V s\u1eed d\u1ee5ng 2P trong khi nh\u1eefng m\u1ea1ch kh\u00e1c s\u1eed d\u1ee5ng hai b\u1ed9 ng\u1eaft m\u1ea1ch 1P ri\u00eang bi\u1ec7t \u0111\u01b0\u1ee3c k\u1ebft n\u1ed1i v\u1edbi nhau?<\/strong><br \/>\n    \u0110: B\u1ed9 ng\u1eaft m\u1ea1ch 2P \u0111\u1ea3m b\u1ea3o ng\u1eaft \u0111\u1ed3ng th\u1eddi th\u00f4ng qua m\u1ed9t li\u00ean k\u1ebft c\u01a1 h\u1ecdc duy nh\u1ea5t. Hai b\u1ed9 ng\u1eaft m\u1ea1ch 1P ri\u00eang bi\u1ec7t c\u00f3 th\u1ec3 kh\u00f4ng ng\u1eaft ch\u00ednh x\u00e1c \u0111\u1ed3ng th\u1eddi trong \u0111i\u1ec1u ki\u1ec7n s\u1ef1 c\u1ed1, t\u1ea1o ra c\u00e1c s\u1ef1 c\u1ed1 pha-pha t\u1ee9c th\u1eddi. NEC y\u00eau c\u1ea7u ng\u1eaft \u0111\u1ed3ng th\u1eddi, l\u00e0m cho 2P tr\u1edf th\u00e0nh l\u1ef1a ch\u1ecdn ph\u00f9 h\u1ee3p.<\/p>\n<p><strong>H: VIOX c\u00f3 cung c\u1ea5p b\u1ed9 ng\u1eaft m\u1ea1ch 1P+N cho h\u1ec7 th\u1ed1ng EU kh\u00f4ng?<\/strong><br \/>\n    \u0110: C\u00f3. MCB d\u00f2ng VM c\u1ee7a VIOX bao g\u1ed3m c\u1ea3 c\u1ea5u h\u00ecnh 1P v\u00e0 1P+N tu\u00e2n th\u1ee7 IEC 60898-1, v\u1edbi c\u00e1c t\u00f9y ch\u1ecdn b\u1ea3o v\u1ec7 trung t\u00ednh c\u00f3 s\u1eb5n trong c\u00e1c bi\u1ebfn th\u1ec3 2P cho c\u00e1c \u1ee9ng d\u1ee5ng c\u00f3 s\u00f3ng h\u00e0i cao.<\/p>\n<p><strong>H: N\u1ebfu t\u00f4i c\u00f3 h\u1ec7 th\u1ed1ng TN-C (trung t\u00ednh v\u00e0 \u0111\u1ea5t k\u1ebft h\u1ee3p l\u00e0m d\u00e2y d\u1eabn PEN), t\u00f4i c\u00f3 th\u1ec3 s\u1eed d\u1ee5ng b\u1ed9 ng\u1eaft m\u1ea1ch 1P+N kh\u00f4ng?<\/strong><br \/>\n    \u0110: Tuy\u1ec7t \u0111\u1ed1i kh\u00f4ng. H\u1ec7 th\u1ed1ng TN-C c\u1ea5m ng\u1eaft d\u00e2y d\u1eabn PEN t\u1ea1i b\u1ea5t k\u1ef3 \u0111i\u1ec3m n\u00e0o. Vi\u1ec7c ng\u1eaft n\u00f3 s\u1ebd lo\u1ea1i b\u1ecf n\u1ed1i \u0111\u1ea5t an to\u00e0n kh\u1ecfi c\u00e1c m\u1ea1ch h\u1ea1 ngu\u1ed3n. Ch\u1ec9 s\u1eed d\u1ee5ng b\u1ed9 ng\u1eaft m\u1ea1ch 1P trong h\u1ec7 th\u1ed1ng TN-C.<\/p>\n<p><strong>H: T\u1ef7 l\u1ec7 ph\u1ea7n tr\u0103m s\u00f3ng h\u00e0i n\u00e0o k\u00edch ho\u1ea1t nhu c\u1ea7u b\u1ea3o v\u1ec7 trung t\u00ednh?<\/strong><br \/>\n    \u0110: Theo h\u01b0\u1edbng d\u1eabn c\u1ee7a IEEE v\u00e0 IEC, b\u1ea3o v\u1ec7 trung t\u00ednh tr\u1edf n\u00ean r\u1ea5t n\u00ean \u0111\u01b0\u1ee3c khuy\u1ebfn ngh\u1ecb khi th\u00e0nh ph\u1ea7n s\u00f3ng h\u00e0i b\u1eadc 3 v\u01b0\u1ee3t qu\u00e1 15% d\u00f2ng \u0111i\u1ec7n pha c\u01a1 b\u1ea3n v\u00e0 b\u1eaft bu\u1ed9c tr\u00ean 33%. C\u00e1c c\u00e0i \u0111\u1eb7t \u0111\u00e8n LED v\u00e0 VFD hi\u1ec7n \u0111\u1ea1i th\u01b0\u1eddng t\u1ea1o ra n\u1ed9i dung s\u00f3ng h\u00e0i 20\u201350%.<\/p>\n<hr style=\"border: 0; border-top: 1px solid #ddd; margin: 30px 0;\">\n<h2>Nh\u1eefng \u0111i\u1ec3m ch\u00ednh<\/h2>\n<p>\u2713 <strong>B\u1ed9 ng\u1eaft m\u1ea1ch 1P<\/strong> ch\u1ec9 b\u1ea3o v\u1ec7 m\u1ed9t d\u00e2y d\u1eabn v\u00e0 ph\u00f9 h\u1ee3p cho c\u00e1c m\u1ea1ch d\u00e2n d\u1ee5ng t\u1ea3i tuy\u1ebfn t\u00ednh trong h\u1ec7 th\u1ed1ng TN-S, n\u01a1i kh\u00f4ng c\u1ea7n c\u00e1ch ly trung t\u00ednh.<\/p>\n<p>\u2713 <strong>B\u1ed9 ng\u1eaft m\u1ea1ch 1P+N<\/strong> th\u00eam trung t\u00ednh <em>chuy\u1ec3n \u0111\u1ed5i<\/em> \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o an to\u00e0n b\u1ea3o tr\u00ec v\u00e0 l\u00e0 ti\u00eau chu\u1ea9n EU\/IEC hi\u1ec7n \u0111\u1ea1i cho t\u1ea5t c\u1ea3 c\u00e1c m\u1ea1ch th\u00f4ng th\u01b0\u1eddng, m\u1eb7c d\u00f9 ch\u00fang kh\u00f4ng cung c\u1ea5p trung t\u00ednh <em>s\u1ef1 b\u1ea3o v\u1ec7<\/em>.<\/p>\n<p>\u2713 <strong>B\u1ed9 ng\u1eaft m\u1ea1ch 2P<\/strong> cung c\u1ea5p kh\u1ea3 n\u0103ng b\u1ea3o v\u1ec7 \u0111\u1ea7y \u0111\u1ee7 tr\u00ean c\u1ea3 hai d\u00e2y d\u1eabn v\u00e0 r\u1ea5t c\u1ea7n thi\u1ebft cho c\u00e1c m\u1ea1ch 240V, h\u1ec7 th\u1ed1ng n\u1ed1i \u0111\u1ea5t IT v\u00e0 b\u1ea5t k\u1ef3 \u1ee9ng d\u1ee5ng n\u00e0o c\u00f3 s\u00f3ng h\u00e0i ho\u1eb7c t\u1ea3i kh\u00f4ng c\u00e2n b\u1eb1ng.<\/p>\n<p>\u2713 <strong>H\u1ec7 th\u1ed1ng n\u1ed1i \u0111\u1ea5t<\/strong> (TN-S, TT, IT) v\u00e0 <strong>n\u1ed9i dung s\u00f3ng h\u00e0i t\u1ea3i<\/strong> l\u00e0 hai y\u1ebfu t\u1ed1 chi ph\u1ed1i vi\u1ec7c l\u1ef1a ch\u1ecdn c\u1ef1c\u2014kh\u00f4ng ch\u1ec9 \u0111i\u1ec7n \u00e1p.<\/p>\n<p>\u2713 <strong>Khi nghi ng\u1edd, h\u00e3y n\u00e2ng c\u1ea5p l\u00ean m\u1ee9c b\u1ea3o v\u1ec7 ti\u1ebfp theo<\/strong> (1P \u2192 1P+N \u2192 2P). S\u1ef1 kh\u00e1c bi\u1ec7t v\u1ec1 chi ph\u00ed l\u00e0 t\u1ed1i thi\u1ec3u, nh\u01b0ng l\u1ee3i \u00edch v\u1ec1 an to\u00e0n v\u00e0 tu\u00e2n th\u1ee7 quy chu\u1ea9n l\u00e0 r\u1ea5t l\u1edbn.<\/p>\n<hr style=\"border: 0; border-top: 1px solid #ddd; margin: 30px 0;\">\n<h2>B\u00e0i vi\u1ebft li\u00ean quan<\/h2>\n<ul>\n<li><a href=\"https:\/\/test.viox.com\/vi\/types-of-circuit-breakers\/\">C\u00e1c lo\u1ea1i \u00c1pt\u00f4m\u00e1t (Circuit Breaker): H\u01b0\u1edbng d\u1eabn l\u1ef1a ch\u1ecdn \u0111\u1ea7y \u0111\u1ee7<\/a><\/li>\n<li><a href=\"https:\/\/test.viox.com\/vi\/how-circuit-breaker-poles-affect-voltage-current-protection\/\">C\u1ef1c c\u1ee7a m\u00e1y c\u1eaft m\u1ea1ch \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn b\u1ea3o v\u1ec7 \u0111i\u1ec7n \u00e1p v\u00e0 d\u00f2ng \u0111i\u1ec7n nh\u01b0 th\u1ebf n\u00e0o<\/a><\/li>\n<li><a href=\"https:\/\/test.viox.com\/vi\/where-to-use-sp-tp-tpn-and-4p-circuit-breakers\/\">N\u01a1i \u0111\u1ec3 S\u1eed d\u1ee5ng SP, TP, TPN v\u00e0 4 p b\u1ed9 Ng\u1eaft M\u1ea1ch<\/a><\/li>\n<li><a href=\"https:\/\/test.viox.com\/vi\/2-pole-vs-3-pole-breaker\/\">M\u00e1y c\u1eaft 2 c\u1ef1c so v\u1edbi 3 c\u1ef1c: H\u01b0\u1edbng d\u1eabn \u0111\u1ea7y \u0111\u1ee7<\/a><\/li>\n<li><a href=\"https:\/\/test.viox.com\/vi\/what-is-a-miniature-circuit-breaker-mcb\/\">B\u1ed9 ng\u1eaft m\u1ea1ch thu nh\u1ecf (MCB) l\u00e0 g\u00ec<\/a><\/li>\n<li><a href=\"https:\/\/test.viox.com\/vi\/circuit-breaker-ratings-icu-ics-icw-icm\/\">\u0110\u1ecbnh m\u1ee9c c\u1ee7a c\u1ea7u dao: Gi\u1ea3i th\u00edch ICU, ICS, ICW, ICM<\/a><\/li>\n<\/ul>\n<\/div>","protected":false},"excerpt":{"rendered":"<p>Selecting the right circuit breaker pole configuration is one of the most critical\u2014and frequently misunderstood\u2014decisions in electrical system design. The difference between a single-pole (1P), single-pole with neutral (1P+N), and double-pole (2P) breaker determines not just whether your system works, but whether it protects equipment and personnel safely. Using the wrong configuration can leave a [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":21342,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"inline_featured_image":false,"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"set","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"categories":[1],"tags":[],"class_list":["post-21341","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog"],"_links":{"self":[{"href":"https:\/\/test.viox.com\/vi\/wp-json\/wp\/v2\/posts\/21341","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/test.viox.com\/vi\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/test.viox.com\/vi\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/test.viox.com\/vi\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/test.viox.com\/vi\/wp-json\/wp\/v2\/comments?post=21341"}],"version-history":[{"count":1,"href":"https:\/\/test.viox.com\/vi\/wp-json\/wp\/v2\/posts\/21341\/revisions"}],"predecessor-version":[{"id":21343,"href":"https:\/\/test.viox.com\/vi\/wp-json\/wp\/v2\/posts\/21341\/revisions\/21343"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/test.viox.com\/vi\/wp-json\/wp\/v2\/media\/21342"}],"wp:attachment":[{"href":"https:\/\/test.viox.com\/vi\/wp-json\/wp\/v2\/media?parent=21341"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/test.viox.com\/vi\/wp-json\/wp\/v2\/categories?post=21341"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/test.viox.com\/vi\/wp-json\/wp\/v2\/tags?post=21341"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}