{"id":4832,"date":"2026-11-05T01:53:40","date_gmt":"2026-11-05T01:53:40","guid":{"rendered":"https:\/\/kaseey.com\/?wpr2_import=82f3fee6e6dcddf720e6a65201de6d6996ee8392ef5f8e41409e51e404ee1af0"},"modified":"2026-11-05T01:53:40","modified_gmt":"2026-11-05T01:53:40","slug":"brass-vs-copper-neutral-bar","status":"publish","type":"post","link":"https:\/\/kaseey.com\/vi\/brass-vs-copper-neutral-bar\/","title":{"rendered":"Thanh trung t\u00ednh b\u1eb1ng \u0111\u1ed3ng thau so v\u1edbi \u0111\u1ed3ng \u0111\u1ecf: N\u00ean s\u1eed d\u1ee5ng lo\u1ea1i n\u00e0o v\u00e0 c\u00e1ch ch\u1ecdn k\u00edch th\u01b0\u1edbc thanh trung t\u00ednh"},"content":{"rendered":"<blockquote>\n<p><strong>C\u00e2u tr\u1ea3 l\u1eddi ng\u1eafn g\u1ecdn<\/strong><\/p>\n<p>\u0110\u1ed1i v\u1edbi h\u1ea7u h\u1ebft c\u00e1c l\u1ef1a ch\u1ecdn thanh trung t\u00ednh cho t\u1ee7 ph\u00e2n ph\u1ed1i th\u00f4ng th\u01b0\u1eddng, h\u00e3y b\u1eaft \u0111\u1ea7u v\u1edbi \u0111\u1ed3ng thau: m\u1ed9t thanh \u0111\u1ea5u n\u1ed1i b\u1eb1ng \u0111\u1ed3ng thau c\u00f3 \u0111\u1ecbnh m\u1ee9c ph\u00f9 h\u1ee3p th\u01b0\u1eddng l\u00e0 \u0111\u1ee7 v\u00e0 c\u00f3 th\u1ec3 l\u00e0 l\u1ef1a ch\u1ecdn linh ki\u1ec7n ho\u00e0n thi\u1ec7n kinh t\u1ebf h\u01a1n. \u0110\u00e2y l\u00e0 \u0111i\u1ec3m kh\u1edfi \u0111\u1ea7u cho vi\u1ec7c l\u1ef1a ch\u1ecdn, kh\u00f4ng ph\u1ea3i l\u00e0 kh\u1eb3ng \u0111\u1ecbnh r\u1eb1ng m\u1ecdi thanh \u0111\u1ed3ng thau \u0111\u1ec1u ph\u00f9 h\u1ee3p v\u1edbi m\u1ecdi lo\u1ea1i t\u1ee7. H\u00e3y ch\u1ecdn \u0111\u1ed3ng khi c\u1ee5m \u0111\u1ed3ng thau hi\u1ec7n c\u00f3 kh\u00f4ng \u0111\u00e1p \u1ee9ng \u0111\u01b0\u1ee3c d\u00f2ng \u0111i\u1ec7n trung t\u00ednh, m\u1ee9c t\u0103ng nhi\u1ec7t \u0111\u1ed9 ho\u1eb7c gi\u1edbi h\u1ea1n t\u1ed5n hao y\u00eau c\u1ea7u trong kh\u00f4ng gian s\u1eb5n c\u00f3, ho\u1eb7c khi th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt c\u1ee7a b\u1ea3ng \u0111i\u1ec7n \u0111\u00e3 \u0111\u01b0\u1ee3c ph\u00ea duy\u1ec7t y\u00eau c\u1ea7u s\u1eed d\u1ee5ng \u0111\u1ed3ng. T\u1ea3i h\u00e0i b\u1eadc cao v\u00e0 d\u00f2ng \u0111i\u1ec7n trung t\u00ednh l\u1edbn k\u00e9o d\u00e0i khi\u1ebfn \u0111\u1ed3ng tr\u1edf n\u00ean \u0111\u00e1ng c\u00e2n nh\u1eafc s\u1edbm; ch\u00fang kh\u00f4ng t\u1ef1 \u0111\u1ed9ng lo\u1ea1i tr\u1eeb \u0111\u1ed3ng thau.<\/p>\n<p>Tr\u01b0\u1edbc ti\u00ean h\u00e3y x\u00e1c \u0111\u1ecbnh k\u00edch th\u01b0\u1edbc d\u00f2ng \u0111i\u1ec7n trung t\u00ednh, sau \u0111\u00f3 ki\u1ec3m tra to\u00e0n b\u1ed9 thanh v\u00e0 c\u00e1c \u0111\u1ea7u n\u1ed1i c\u1ee7a n\u00f3. C\u1ea3 s\u1ed1 l\u01b0\u1ee3ng l\u1ed7 hay t\u1ef7 l\u1ec7 d\u1eabn \u0111i\u1ec7n \u0111\u1ec1u kh\u00f4ng thi\u1ebft l\u1eadp \u0111\u1ecbnh m\u1ee9c ampe.<\/p>\n<\/blockquote>\n<p>Th\u1ef1c t\u1ebf <strong>thanh trung t\u00ednh b\u1eb1ng \u0111\u1ed3ng thau so v\u1edbi thanh trung t\u00ednh b\u1eb1ng \u0111\u1ed3ng<\/strong> quy\u1ebft \u0111\u1ecbnh n\u1eb1m \u1edf \u0111\u01b0\u1eddng d\u1eabn d\u00f2ng \u0111i\u1ec7n tr\u1edf v\u1ec1 trong m\u1ed9t t\u1ee7 \u0111i\u1ec7n c\u1ee5 th\u1ec3. H\u01b0\u1edbng d\u1eabn n\u00e0y \u0111\u01b0a b\u1ea1n t\u1eeb c\u00e1c gi\u1ea3 \u0111\u1ecbnh v\u1ec1 t\u1ea3i \u0111\u1ebfn m\u1ed9t \u1ee9ng vi\u00ean \u0111\u01b0\u1ee3c ghi nh\u1eadn, s\u1eed d\u1ee5ng c\u00e1c k\u00edch th\u01b0\u1edbc \u0111\u00e3 c\u00f4ng b\u1ed1 c\u1ee7a Kaseey m\u00e0 kh\u00f4ng t\u1ef1 \u00fd \u0111\u01b0a ra c\u00e1c \u0111\u1ecbnh m\u1ee9c \u0111i\u1ec7n c\u00f2n thi\u1ebfu.<\/p>\n<p>\u0110\u1ec3 bi\u1ebft v\u1ec1 vi\u1ec7c ph\u00e2n t\u00e1ch ch\u1ee9c n\u0103ng trung t\u00ednh\/ti\u1ebfp \u0111\u1ecba v\u00e0 danh m\u1ee5c ki\u1ec3m tra mua h\u00e0ng T15 hi\u1ec7n c\u00f3, h\u00e3y xem <a href=\"https:\/\/kaseey.com\/vi\/blog\/brass-bars-neutral-earth-distribution\">Thanh \u0111\u1ed3ng thau cho ph\u00e2n ph\u1ed1i trung t\u00ednh v\u00e0 n\u1ed1i \u0111\u1ea5t<\/a>. Th\u1ea3o lu\u1eadn r\u1ed9ng h\u01a1n v\u1ec1 v\u1eadt li\u1ec7u b\u1ea3ng \u0111i\u1ec7n thu\u1ed9c v\u1ec1 <a href=\"https:\/\/kaseey.com\/vi\/copper-bars-vs-brass-bars-for-electrical-panels\/\">Thanh \u0111\u1ed3ng so v\u1edbi thanh \u0111\u1ed3ng thau cho t\u1ee7 \u0111i\u1ec7n<\/a>.<\/p>\n<h2>D\u1eef li\u1ec7u v\u1eadt li\u1ec7u: \u00fd ngh\u0129a th\u1ef1c s\u1ef1 c\u1ee7a 28% IACS<\/h2>\n<p>IACS th\u1ec3 hi\u1ec7n \u0111\u1ed9 d\u1eabn \u0111i\u1ec7n t\u01b0\u01a1ng \u0111\u1ed1i so v\u1edbi Ti\u00eau chu\u1ea9n \u0110\u1ed3ng \u1ee7 Qu\u1ed1c t\u1ebf. \u201c\u0110\u1ed3ng thau \u0111\u1ea1t kho\u1ea3ng 28% IACS\u201d ch\u1ec9 l\u00e0 m\u1ed9t v\u00ed d\u1ee5 h\u1eefu \u00edch khi h\u1ee3p kim \u0111\u01b0\u1ee3c n\u00eau t\u00ean. Hi\u1ec7p h\u1ed9i Ph\u00e1t tri\u1ec3n \u0110\u1ed3ng (CDA) li\u1ec7t k\u00ea <strong>C26000 \u0111\u1ed3ng thau l\u00e0m v\u1ecf \u0111\u1ea1n \u1edf m\u1ee9c 28% IACS<\/strong>, trong khi <strong>C36000 \u0111\u1ed3ng thau c\u1eaft g\u1ecdt t\u1ef1 do l\u00e0 26% IACS<\/strong>. H\u1ed3 s\u01a1 C11000 \u0111\u1ed3ng c\u1ee7a n\u00f3 li\u1ec7t k\u00ea 101% IACS v\u00e0 m\u1ee9c t\u1ed1i thi\u1ec3u l\u00e0 100% trong \u0111i\u1ec1u ki\u1ec7n \u1ee7.<\/p>\n<table>\n<thead>\n<tr>\n<th>Tham chi\u1ebfu v\u1eadt li\u1ec7u<\/th>\n<th align=\"right\">\u0110\u1ed9 d\u1eabn \u0111i\u1ec7n t\u1ea1i 20 C<\/th>\n<th>S\u1eed d\u1ee5ng trong so s\u00e1nh thanh trung t\u00ednh n\u00e0y<\/th>\n<th>Ngu\u1ed3n<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>C26000 \u0111\u1ed3ng thau cartridge<\/td>\n<td align=\"right\">28% IACS<\/td>\n<td>V\u00ed d\u1ee5 cho ph\u00e9p t\u00ednh 28%<\/td>\n<td><a href=\"https:\/\/alloys.copper.org\/alloy\/C26000\" target=\"_blank\" rel=\"noopener\">B\u1ea3n ghi C26000 CDA<\/a><\/td>\n<\/tr>\n<tr>\n<td>C36000 \u0111\u1ed3ng thau c\u1eaft t\u1ef1 do<\/td>\n<td align=\"right\">26% IACS<\/td>\n<td>Cho th\u1ea5y t\u1ea1i sao lo\u1ea1i \u0111\u1ed3ng thau l\u00e0m thay \u0111\u1ed5i k\u1ebft qu\u1ea3<\/td>\n<td><a href=\"https:\/\/alloys.copper.org\/alloy\/C36000\" target=\"_blank\" rel=\"noopener\">B\u1ea3n ghi C36000 CDA<\/a><\/td>\n<\/tr>\n<tr>\n<td>C11000 \u0111\u1ed3ng ETP<\/td>\n<td align=\"right\">101% IACS \u0111\u01b0\u1ee3c li\u1ec7t k\u00ea; 100% t\u1ed1i thi\u1ec3u khi \u1ee7<\/td>\n<td>Tham chi\u1ebfu \u0111\u1ed3ng c\u00f3 \u0111\u1ed9 d\u1eabn \u0111i\u1ec7n cao \u0111\u01b0\u1ee3c ch\u1ec9 \u0111\u1ecbnh<\/td>\n<td><a href=\"https:\/\/alloys.copper.org\/alloy\/C11000\" target=\"_blank\" rel=\"noopener\">H\u1ed3 s\u01a1 CDA C11000<\/a><\/td>\n<\/tr>\n<tr>\n<td>Thanh \u0111\u1ed3ng thau Kaseey T15 ho\u1eb7c thanh \u0111\u1ed3ng KB<\/td>\n<td align=\"right\">ki\u1ec3m tra b\u1ea3ng d\u1eef li\u1ec7u<\/td>\n<td>X\u00e1c nh\u1eadn c\u1ea5p \u0111\u1ed9 v\u00e0 \u0111\u1ed9 c\u1ee9ng th\u1ef1c t\u1ebf \u0111\u01b0\u1ee3c cung c\u1ea5p<\/td>\n<td>C\u00e1c h\u1ed3 s\u01a1 s\u1ea3n ph\u1ea9m Kaseey d\u01b0\u1edbi \u0111\u00e2y kh\u00f4ng c\u00f4ng b\u1ed1 c\u00e1c c\u1ea5p \u0111\u1ed9 CDA n\u00e0y<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>\u0110\u00e2y l\u00e0 c\u00e1c gi\u00e1 tr\u1ecb tham chi\u1ebfu v\u1eadt li\u1ec7u, kh\u00f4ng ph\u1ea3i l\u00e0 \u0111\u1ed9 d\u1eabn \u0111i\u1ec7n ho\u1eb7c \u0111\u1ecbnh m\u1ee9c d\u00f2ng \u0111i\u1ec7n \u0111\u01b0\u1ee3c \u0111o l\u01b0\u1eddng cho c\u00e1c s\u1ea3n ph\u1ea9m Kaseey. Kh\u00f4ng ch\u1ec9 \u0111\u1ecbnh C26000, C36000 ho\u1eb7c C11000 v\u00e0o \u0111\u01a1n \u0111\u1eb7t h\u00e0ng n\u1ebfu kh\u00f4ng c\u00f3 x\u00e1c nh\u1eadn v\u1eadt li\u1ec7u t\u1eeb nh\u00e0 s\u1ea3n xu\u1ea5t.<\/p>\n<h3>T\u00ednh to\u00e1n ti\u1ebft di\u1ec7n \u0111i\u1ec7n tr\u1edf t\u01b0\u01a1ng \u0111\u01b0\u01a1ng, kh\u00f4ng ph\u1ea3i \u0111\u1ecbnh m\u1ee9c d\u00f2ng \u0111i\u1ec7n<\/h3>\n<p>\u0110\u1ed1i v\u1edbi d\u00e2y d\u1eabn \u0111\u1eb7c \u0111\u1ed3ng nh\u1ea5t:<\/p>\n<p><code>R = L \/ (sigma x A)<\/code><\/p>\n<p>Trong \u0111\u00f3, <code>L<\/code> l\u00e0 chi\u1ec1u d\u00e0i \u0111\u01b0\u1eddng d\u1eabn d\u00f2ng \u0111i\u1ec7n, <code>sigma<\/code> l\u00e0 \u0111\u1ed9 d\u1eabn \u0111i\u1ec7n v\u00e0 <code>A<\/code> l\u00e0 di\u1ec7n t\u00edch m\u1eb7t c\u1eaft ngang. \u1ede c\u00f9ng m\u1ed9t d\u00f2ng \u0111i\u1ec7n, t\u1ed5n hao c\u00f4ng su\u1ea5t \u0111i\u1ec7n tr\u1edf l\u00e0 <code>P = I^2 x R<\/code>. Gi\u1eef nguy\u00ean chi\u1ec1u d\u00e0i, nhi\u1ec7t \u0111\u1ed9 v\u00e0 \u0111i\u1ec7n tr\u1edf ta c\u00f3:<\/p>\n<p><code>A_\u0111\u1ed3ng thau \/ A_\u0111\u1ed3ng = sigma_\u0111\u1ed3ng \/ sigma_\u0111\u1ed3ng thau<\/code><\/p>\n<p>S\u1eed d\u1ee5ng m\u1ed9t <strong>100% tham chi\u1ebfu \u0111\u1ed3ng IACS<\/strong> v\u00e0 <strong>28% \u0111\u1ed3ng thau IACS<\/strong>:<\/p>\n<p><code>A_\u0111\u1ed3ng thau = A_\u0111\u1ed3ng x 100 \/ 28 = 3.57 x A_\u0111\u1ed3ng<\/code><\/p>\n<p>\u0110\u1ed1i v\u1edbi m\u1ed9t ti\u1ebft di\u1ec7n \u0111\u1ed3ng \u0111\u1eb7c 25 mm2 minh h\u1ecda, ti\u1ebft di\u1ec7n \u0111\u1ed3ng thau c\u00f3 \u0111i\u1ec7n tr\u1edf t\u01b0\u01a1ng \u0111\u01b0\u01a1ng l\u00e0 <code>25 x 100 \/ 28 = 89.3 mm2<\/code>. S\u1eed d\u1ee5ng gi\u00e1 tr\u1ecb 101% \u0111\u01b0\u1ee3c li\u1ec7t k\u00ea c\u1ee7a CDA thay v\u00e0o \u0111\u00f3 s\u1ebd cho k\u1ebft qu\u1ea3 <code>25 x 101 \/ 28 = 90.2 mm2<\/code>. \u1ede 26% IACS, ph\u00e9p t\u00ednh tham chi\u1ebfu 100% tr\u1edf th\u00e0nh <code>25 x 100 \/ 26 = 96.2 mm2<\/code>.<\/p>\n<p>C\u00e1c di\u1ec7n t\u00edch \u0111\u01b0\u1ee3c t\u00ednh to\u00e1n \u0111\u00f3 l\u00e0 <strong>kh\u00f4ng ph\u1ea3i l\u00e0 k\u00edch th\u01b0\u1edbc thanh trung t\u00ednh \u0111\u01b0\u1ee3c ph\u00ea duy\u1ec7t<\/strong>. Thanh \u0111\u1ea5u n\u1ed1i th\u1ef1c t\u1ebf c\u00f3 c\u00e1c l\u1ed7 khoan, l\u00e0m thay \u0111\u1ed5i \u0111\u01b0\u1eddng \u0111i c\u1ee7a d\u00f2ng \u0111i\u1ec7n, \u0111i\u1ec7n tr\u1edf k\u1ebft n\u1ed1i v\u00e0 \u0111i\u1ec1u ki\u1ec7n truy\u1ec1n nhi\u1ec7t. D\u00f2ng \u0111i\u1ec7n c\u0169ng thay \u0111\u1ed5i d\u1ecdc theo thanh \u0111a chi\u1ec1u khi c\u00e1c m\u1ea1ch ri\u00eang l\u1ebb k\u1ebft n\u1ed1i. \u0110i\u1ec7n tr\u1edf kh\u1ed1i b\u1eb1ng nhau kh\u00f4ng \u0111\u1ea3m b\u1ea3o s\u1ef1 t\u0103ng nhi\u1ec7t \u0111\u1ed9 ho\u1eb7c hi\u1ec7u su\u1ea5t ng\u1eafn m\u1ea1ch b\u1eb1ng nhau.<\/p>\n<p>Ch\u1ec9 \u0111\u1ec3 \u0111\u1ecbnh h\u01b0\u1edbng, m\u1ed9t h\u00ecnh ch\u1eef nh\u1eadt 6 x 9 mm bao quanh cho di\u1ec7n t\u00edch 54 mm2 t\u1ed5ng, v\u00e0 8 x 12 mm cho 96 mm2. \u0110\u00e2y l\u00e0 c\u00e1c t\u00edch s\u1ed1 h\u1ecdc c\u1ee7a c\u00e1c k\u00edch th\u01b0\u1edbc b\u00ean ngo\u00e0i, tr\u01b0\u1edbc b\u1ea5t k\u1ef3 l\u1ed7 n\u00e0o. S\u1ef1 g\u1ea7n g\u0169i c\u1ee7a 96 mm2 v\u1edbi m\u1ed9t k\u1ebft qu\u1ea3 t\u00ednh to\u00e1n kh\u00f4ng ph\u00ea duy\u1ec7t m\u1ed9t thanh 8 x 12 T15 cho c\u00f9ng m\u1ed9t nhi\u1ec7m v\u1ee5 nh\u01b0 m\u1ed9t thanh \u0111\u1ed3ng c\u1ee5 th\u1ec3. Cu\u1ed1n <a href=\"https:\/\/www.kupfer.de\/wp-content\/uploads\/2019\/11\/Copper-for-Busbars.pdf\" target=\"_blank\" rel=\"noopener\">S\u1ed5 tay \u0110\u1ed3ng cho Thanh c\u00e1i<\/a>, c\u00e1c m\u1ee5c 2.2 v\u00e0 6, gi\u1ea3i th\u00edch l\u00fd do t\u1ea1i sao c\u00e2n b\u1eb1ng nhi\u1ec7t v\u00e0 thi\u1ebft k\u1ebf m\u1ed1i n\u1ed1i c\u0169ng quan tr\u1ecdng.<\/p>\n<figure class=\"wp-block-image\">\n<img decoding=\"async\" src=\"https:\/\/kaseey.com\/wp-content\/uploads\/2026\/11\/brass-vs-copper-neutral-bar-resistance.webp\" alt=\"Kaseey T15 brass product photo with schematic equal-resistance area comparison and the 100 divided by 28 calculation\"><figcaption>\u0110\u01b0\u1ee3c ch\u1ec9nh s\u1eeda t\u1eeb \u1ea3nh s\u1ea3n ph\u1ea9m T15 c\u1ee7a Kaseey. A l\u00e0 di\u1ec7n t\u00edch m\u1eb7t c\u1eaft ngang, kh\u00f4ng ph\u1ea3i ampe. C\u00e1c h\u00ecnh ch\u1eef nh\u1eadt minh h\u1ecda m\u1ed1i quan h\u1ec7 d\u00e2y d\u1eabn \u0111\u1eb7c, kh\u00f4ng ph\u1ea3i h\u00ecnh h\u1ecdc T15 \u0111\u00e3 khoan ho\u1eb7c \u0111\u1ecbnh m\u1ee9c d\u00f2ng \u0111i\u1ec7n c\u1ee7a n\u00f3.<\/figcaption><\/figure>\n<h2>C\u00e1ch ch\u1ecdn k\u00edch th\u01b0\u1edbc thanh trung t\u00ednh<\/h2>\n<h3>B\u01b0\u1edbc 1: x\u00e1c \u0111\u1ecbnh d\u00f2ng \u0111i\u1ec7n thi\u1ebft k\u1ebf trung t\u00ednh<\/h3>\n<p>Ghi l\u1ea1i s\u01a1 \u0111\u1ed3 c\u1ea5p ngu\u1ed3n, nhu c\u1ea7u t\u1ea3i \u0111\u1ed3ng th\u1eddi, ph\u00e2n b\u1ed5 pha, ph\u1ed5 h\u00e0i v\u00e0 th\u1eddi gian v\u1eadn h\u00e0nh d\u1ef1 ki\u1ebfn. S\u1eed d\u1ee5ng d\u1eef li\u1ec7u t\u1ea3i ho\u1eb7c c\u00e1c ph\u00e9p \u0111o ph\u00f9 h\u1ee3p v\u1edbi c\u00e1c tr\u01b0\u1eddng h\u1ee3p v\u1eadn h\u00e0nh, bao g\u1ed3m c\u1ea3 vi\u1ec7c m\u1edf r\u1ed9ng theo k\u1ebf ho\u1ea1ch. \u0110\u1eebng ch\u1ec9 c\u1ed9ng t\u1ea5t c\u1ea3 \u0111\u1ecbnh m\u1ee9c c\u1ee7a c\u00e1c b\u1ed9 ng\u1eaft m\u1ea1ch \u0111\u1ea7u ra ho\u1eb7c gi\u1ea3 \u0111\u1ecbnh r\u1eb1ng b\u1ea3ng \u0111i\u1ec7n ba pha c\u00e2n b\u1eb1ng kh\u00f4ng c\u00f3 t\u1ea3i trung t\u00ednh.<\/p>\n<ul>\n<li><strong>T\u1ea3i m\u1ed9t pha, hai d\u00e2y:<\/strong> d\u00e2y trung t\u00ednh mang d\u00f2ng \u0111i\u1ec7n tr\u1edf v\u1ec1 c\u1ee7a m\u1ea1ch. \u0110\u1ed1i v\u1edbi b\u1ea3ng \u0111i\u1ec7n m\u1ed9t pha, h\u00e3y \u0111\u00e1nh gi\u00e1 nhu c\u1ea7u trung t\u00ednh \u0111\u1ed3ng th\u1eddi t\u1ed1i \u0111a th\u00f4ng qua k\u1ebft n\u1ed1i \u0111\u1ea7u v\u00e0o chung v\u00e0 t\u1eebng \u0111o\u1ea1n thanh c\u00e1i.<\/li>\n<li><strong>M\u1ea5t c\u00e2n b\u1eb1ng ba pha:<\/strong> t\u1ea1i t\u1ea7n s\u1ed1 c\u01a1 b\u1ea3n, c\u1ed9ng ba vect\u01a1 d\u00f2ng \u0111i\u1ec7n pha. \u0110\u1ed1i v\u1edbi t\u1ea3i h\u00ecnh sin c\u00f3 h\u1ec7 s\u1ed1 c\u00f4ng su\u1ea5t d\u1ecbch chuy\u1ec3n b\u1eb1ng nhau, <code>I_N = sqrt(I_A^2 + I_B^2 + I_C^2 - I_A I_B - I_B I_C - I_C I_A)<\/code>. C\u00e1c h\u1ec7 s\u1ed1 c\u00f4ng su\u1ea5t kh\u00e1c nhau y\u00eau c\u1ea7u c\u00e1c g\u00f3c pha th\u1ef1c t\u1ebf.<\/li>\n<li><strong>S\u00f3ng h\u00e0i b\u1eadc ba:<\/strong> c\u00e1c th\u00e0nh ph\u1ea7n s\u00f3ng h\u00e0i b\u1eadc ba c\u00e2n b\u1eb1ng c\u1ed9ng d\u1ed3n trong d\u00e2y trung t\u00ednh thay v\u00ec tri\u1ec7t ti\u00eau l\u1eabn nhau. Theo gi\u1ea3 \u0111\u1ecbnh \u0111\u00f3, <code>I_N,3 = 3 x I_phase,3<\/code>. K\u1ebft h\u1ee3p c\u00e1c th\u00e0nh ph\u1ea7n trung t\u00ednh c\u00f3 t\u1ea7n s\u1ed1 kh\u00e1c nhau b\u1eb1ng ph\u01b0\u01a1ng ph\u00e1p c\u0103n b\u1eadc hai c\u1ee7a t\u1ed5ng b\u00ecnh ph\u01b0\u01a1ng. D\u00e2y trung t\u00ednh ch\u1ee9a nhi\u1ec1u s\u00f3ng h\u00e0i c\u00f3 th\u1ec3 \u0111\u1ea1t t\u1edbi ho\u1eb7c v\u01b0\u1ee3t qu\u00e1 m\u1ee9c d\u00f2ng \u0111i\u1ec7n pha; h\u00e3y ki\u1ec3m tra ph\u1ed5 thay v\u00ec d\u1ef1a v\u00e0o s\u1ef1 c\u00e2n b\u1eb1ng pha.<\/li>\n<\/ul>\n<p>H\u00e0nh vi s\u00f3ng h\u00e0i n\u00e0y \u0111\u01b0\u1ee3c \u0111\u1ec1 c\u1eadp trong <a href=\"https:\/\/standards.theiteh.com\/catalog\/standards\/iec\/d2a8f670-f7ae-489f-9949-87bc2a3b8988\/iec-60364-5-52-2009-amd1-2024\" target=\"_blank\" rel=\"noopener\">IEC 60364-5-52 S\u1eeda \u0111\u1ed5i 1:2024, Ph\u1ee5 l\u1ee5c E<\/a>. Its cable factors are not neutral-bar ampacity factors.<\/p>\n<h3>Step 2: check whether neutral-conductor reduction is allowed<\/h3>\n<p>The correct reference is <strong>IEC 60364-5-52, Clause 524<\/strong>, not a separate &#8220;IEC 60364-5-524&#8221; standard. Amendment 1:2024 replaces 524.2:<\/p>\n<ul>\n<li>Single-phase circuits require a neutral section at least equal to the line section.<\/li>\n<li>The same applies to polyphase circuits with line sections up to 16 mm2 copper or 25 mm2 aluminium.<\/li>\n<li>In other cases, a reduced neutral must remain at least 16 mm2 copper or 25 mm2 aluminium, and at least 50% of the line section.<\/li>\n<li>V\u1edbi c\u00e1c s\u00f3ng h\u00e0i b\u1eadc ba, 524.3 h\u01b0\u1edbng d\u1eabn l\u1ef1a ch\u1ecdn Ph\u1ee5 l\u1ee5c E ho\u1eb7c xem x\u00e9t IEC 60364-4-43:2023, 431.2.3.<\/li>\n<\/ul>\n<p>\u0110\u00e2y l\u00e0 c\u00e1c quy t\u1eafc v\u1ec1 d\u00e2y d\u1eabn, kh\u00f4ng ph\u1ea3i l\u00e0 s\u1ef1 cho ph\u00e9p c\u1eaft \u0111\u00f4i thanh \u0111\u1ed3ng thau. H\u00e3y x\u00e1c minh kh\u1ea3 n\u0103ng mang d\u00f2ng \u0111i\u1ec7n, b\u1ea3o v\u1ec7 qu\u00e1 d\u00f2ng, \u0111i\u1ec1u ki\u1ec7n l\u1eafp \u0111\u1eb7t v\u00e0 phi\u00ean b\u1ea3n \u0111\u01b0\u1ee3c \u00e1p d\u1ee5ng t\u1ea1i \u0111\u1ecba ph\u01b0\u01a1ng. Kh\u00f4ng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng l\u1ea1i c\u00e1c ng\u01b0\u1ee1ng s\u00f3ng h\u00e0i 2009 ch\u01b0a s\u1eeda \u0111\u1ed5i l\u00e0m quy t\u1eafc d\u00f2ng \u0111i\u1ec7n ho\u00e0n ch\u1ec9nh. <a href=\"https:\/\/standards.theiteh.com\/catalog\/standards\/iec\/d2a8f670-f7ae-489f-9949-87bc2a3b8988\/iec-60364-5-52-2009-amd1-2024\" target=\"_blank\" rel=\"noopener\">\u0110\u1ecdc v\u0103n b\u1ea3n s\u1eeda \u0111\u1ed5i IEC, c\u00e1c \u0110i\u1ec1u 524.2 v\u00e0 524.3<\/a>.<\/p>\n<h3>B\u01b0\u1edbc 3: l\u1eadp danh s\u00e1ch r\u00fat g\u1ecdn c\u1ea5u h\u00ecnh d\u1ef1a tr\u00ean b\u1eb1ng ch\u1ee9ng c\u1ee7a nh\u00e0 s\u1ea3n xu\u1ea5t<\/h3>\n<p>B\u1eaft \u0111\u1ea7u v\u1edbi <a href=\"https:\/\/kaseey.com\/vi\/brass-bars\">D\u00f2ng s\u1ea3n ph\u1ea9m thanh \u0111\u1ed3ng thau Kaseey<\/a> v\u00e0 <a href=\"https:\/\/kaseey.com\/vi\/solutions\/neutral-earth-distribution\">tuy\u1ebfn s\u1ea3n ph\u1ea9m ph\u00e2n ph\u1ed1i trung t\u00ednh v\u00e0 ti\u1ebfp \u0111\u1ecba<\/a>. B\u1ea3ng d\u01b0\u1edbi \u0111\u00e2y ch\u1ec9 tr\u00edch xu\u1ea5t c\u00e1c d\u1eef ki\u1ec7n k\u00edch th\u01b0\u1edbc c\u1ea7n thi\u1ebft cho vi\u1ec7c so s\u00e1nh v\u1ecb tr\u00ed \u0111\u1ea7u ra 12. \u0110\u00e2y kh\u00f4ng ph\u1ea3i l\u00e0 s\u1ef1 l\u1eb7p l\u1ea1i c\u1ee7a to\u00e0n b\u1ed9 ma tr\u1eadn \u0111\u1eb7t h\u00e0ng T15.<\/p>\n<p><strong>Ranh gi\u1edbi b\u1eb1ng ch\u1ee9ng:<\/strong> c\u00f4ng ch\u00fang <a href=\"https:\/\/kaseey.com\/vi\/brass-bars\/brass-bar-t15-series\">T15A \/ T15B b\u1ea3ng k\u1ef9 thu\u1eadt<\/a> li\u1ec7t k\u00ea ki\u1ec3u m\u00e1y, s\u1ed1 \u0111\u01b0\u1eddng, c\u1ea5u h\u00ecnh v\u00e0 \u0111\u01b0\u1eddng k\u00ednh. T\u00e0i li\u1ec7u n\u00e0y kh\u00f4ng c\u00f4ng b\u1ed1 \u0111\u1ecbnh m\u1ee9c ampe, ph\u1ea1m vi ch\u1ea5p nh\u1eadn d\u00e2y d\u1eabn ho\u1eb7c l\u1ef1c si\u1ebft cho c\u00e1c h\u00e0ng n\u00e0y. B\u1ea3ng d\u1eef li\u1ec7u k\u1ef9 thu\u1eadt \u0111\u01b0\u1ee3c ki\u1ec3m so\u00e1t c\u1ee7a t\u00e0i li\u1ec7u n\u00e0y c\u00f3 s\u1eb5n theo y\u00eau c\u1ea7u. Do \u0111\u00f3, m\u1ecdi tr\u01b0\u1eddng l\u1ef1a ch\u1ecdn c\u00f2n thi\u1ebfu v\u1eabn <code>ki\u1ec3m tra b\u1ea3ng d\u1eef li\u1ec7u<\/code>.<\/p>\n<table>\n<thead>\n<tr>\n<th>Tr\u01b0\u1eddng l\u1ef1a ch\u1ecdn<\/th>\n<th>T15A-0609\/12+1<\/th>\n<th>T15A-0812\/12+1<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>H\u1ecd s\u1ea3n ph\u1ea9m<\/td>\n<td>T15A thanh \u0111\u1ed3ng thau<\/td>\n<td>T15A thanh \u0111\u1ed3ng thau<\/td>\n<\/tr>\n<tr>\n<td>C\u1ea5u h\u00ecnh \u0111\u00e3 c\u00f4ng b\u1ed1, mm<\/td>\n<td>6 x 9<\/td>\n<td>8 x 12<\/td>\n<\/tr>\n<tr>\n<td>S\u1ed1 \u0111\u01b0\u1eddng \u0111\u00e3 c\u00f4ng b\u1ed1<\/td>\n<td>12<\/td>\n<td>12<\/td>\n<\/tr>\n<tr>\n<td>\u0110\u01b0\u1eddng k\u00ednh \u0111\u00e3 c\u00f4ng b\u1ed1, mm<\/td>\n<td>5.2<\/td>\n<td>6.0<\/td>\n<\/tr>\n<tr>\n<td>D\u00f2ng \u0111i\u1ec7n li\u00ean t\u1ee5c \u0111\u1ecbnh m\u1ee9c v\u00e0 \u0111i\u1ec1u ki\u1ec7n tham chi\u1ebfu<\/td>\n<td>ki\u1ec3m tra b\u1ea3ng d\u1eef li\u1ec7u<\/td>\n<td>ki\u1ec3m tra b\u1ea3ng d\u1eef li\u1ec7u<\/td>\n<\/tr>\n<tr>\n<td>V\u1eadt li\u1ec7u, k\u00edch th\u01b0\u1edbc v\u00e0 c\u1ea5u t\u1ea1o d\u00e2y d\u1eabn cho ph\u00e9p<\/td>\n<td>ki\u1ec3m tra b\u1ea3ng d\u1eef li\u1ec7u<\/td>\n<td>ki\u1ec3m tra b\u1ea3ng d\u1eef li\u1ec7u<\/td>\n<\/tr>\n<tr>\n<td>Ch\u1ea5p nh\u1eadn v\u00e0 ph\u00e2n b\u1ed5 \u0111\u1ea7u n\u1ed1i \u0111\u1ea7u v\u00e0o<\/td>\n<td>ki\u1ec3m tra b\u1ea3ng d\u1eef li\u1ec7u<\/td>\n<td>ki\u1ec3m tra b\u1ea3ng d\u1eef li\u1ec7u<\/td>\n<\/tr>\n<tr>\n<td>M\u00f4-men xo\u1eafn si\u1ebft<\/td>\n<td>ki\u1ec3m tra b\u1ea3ng d\u1eef li\u1ec7u<\/td>\n<td>ki\u1ec3m tra b\u1ea3ng d\u1eef li\u1ec7u<\/td>\n<\/tr>\n<tr>\n<td>\u0110i\u1ec1u ki\u1ec7n t\u0103ng nhi\u1ec7t \u0111\u1ed9 v\u00e0 v\u1ecf bao<\/td>\n<td>ki\u1ec3m tra b\u1ea3ng d\u1eef li\u1ec7u<\/td>\n<td>ki\u1ec3m tra b\u1ea3ng d\u1eef li\u1ec7u<\/td>\n<\/tr>\n<tr>\n<td>Ch\u1ebf \u0111\u1ed9 ng\u1eafn m\u1ea1ch v\u00e0 c\u00e1ch b\u1ed1 tr\u00ed h\u1ed7 tr\u1ee3<\/td>\n<td>ki\u1ec3m tra b\u1ea3ng d\u1eef li\u1ec7u<\/td>\n<td>ki\u1ec3m tra b\u1ea3ng d\u1eef li\u1ec7u<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>C\u1ea5u h\u00ecnh l\u1edbn h\u01a1n l\u00e0 m\u1ed9t l\u1ef1a ch\u1ecdn khi c\u1ea7n ti\u1ebft di\u1ec7n d\u1eabn \u0111i\u1ec7n l\u1edbn h\u01a1n ho\u1eb7c h\u00ecnh d\u1ea1ng \u0111\u1ea7u cu\u1ed1i kh\u00e1c. N\u00f3 kh\u00f4ng t\u1ef1 \u0111\u1ed9ng c\u00f3 \u0111\u1ecbnh m\u1ee9c d\u00f2ng \u0111i\u1ec7n cao h\u01a1n. M\u1ed9t l\u1ed7 6.0 mm c\u0169ng kh\u00f4ng thi\u1ebft l\u1eadp \u0111\u1ecbnh m\u1ee9c d\u00e2y 6 mm2: \u0111\u01b0\u1eddng k\u00ednh v\u00e0 di\u1ec7n t\u00edch m\u1eb7t c\u1eaft ngang c\u1ee7a d\u00e2y d\u1eabn l\u00e0 c\u00e1c \u0111\u1ea1i l\u01b0\u1ee3ng kh\u00e1c nhau.<\/p>\n<p>\u0110\u1ed1i v\u1edbi l\u1ef1a ch\u1ecdn thay th\u1ebf b\u1eb1ng \u0111\u1ed3ng, Kaseey\u2019s <a href=\"https:\/\/kaseey.com\/vi\/copper-bars\/copper-bar-kb-series\">B\u1ea3ng s\u1ea3n ph\u1ea9m d\u00f2ng KB<\/a> c\u00f4ng b\u1ed1 KB320125 l\u00e0 3 x 20 x 125 mm v\u00e0 KB440180 l\u00e0 4 x 40 x 180 mm. \u0110\u00e2y l\u00e0 c\u00e1c c\u1ea5u tr\u00fac thanh \u0111\u1ed3ng kh\u00e1c nhau, kh\u00f4ng ph\u1ea3i l\u00e0 c\u00e1c \u0111\u1ea7u n\u1ed1i trung t\u00ednh T15 c\u00f3 th\u1ec3 thay th\u1ebf cho nhau. C\u1ea5u h\u00ecnh \u0111\u1ea7u n\u1ed1i trung t\u00ednh, c\u00e1c giao di\u1ec7n d\u00e2y d\u1eabn \u0111\u01b0\u1ee3c ph\u00ea duy\u1ec7t v\u00e0 nhi\u1ec7m v\u1ee5 d\u00f2ng \u0111i\u1ec7n l\u1eafp \u0111\u1eb7t c\u1ee7a ch\u00fang c\u1ea7n \u0111\u01b0\u1ee3c x\u00e1c nh\u1eadn; kh\u00f4ng c\u00f3 \u0111\u1ecbnh m\u1ee9c d\u00f2ng \u0111i\u1ec7n n\u00e0o \u0111\u01b0\u1ee3c suy ra \u1edf \u0111\u00e2y.<\/p>\n<h3>B\u01b0\u1edbc 4: ph\u00e2n b\u1ed5 c\u00e1c \u0111\u01b0\u1eddng d\u1eabn v\u00e0 x\u00e1c minh t\u1eebng k\u1ebft n\u1ed1i<\/h3>\n<p>\u0110\u1ebfm c\u00e1c d\u00e2y d\u1eabn trung t\u00ednh \u0111\u1ea7u ra, th\u00eam c\u00e1c v\u1ecb tr\u00ed d\u1ef1 ph\u00f2ng \u0111\u00e3 th\u1ecfa thu\u1eadn v\u00e0 cung c\u1ea5p m\u1ed9t k\u1ebft n\u1ed1i \u0111\u1ea7u v\u00e0o \u0111\u00e3 \u0111\u01b0\u1ee3c x\u00e1c minh ri\u00eang. S\u1eed d\u1ee5ng <strong>m\u1ed9t d\u00e2y d\u1eabn trung t\u00ednh cho m\u1ed7i \u0111\u1ea7u n\u1ed1i<\/strong> cho quy tr\u00ecnh l\u1ef1a ch\u1ecdn n\u00e0y. Kh\u00f4ng \u0111\u1eb7t hai d\u00e2y trung t\u00ednh v\u00e0o m\u1ed9t l\u1ed7 \u0111\u1ec3 tr\u00e1nh vi\u1ec7c ph\u1ea3i ch\u1ecdn thanh d\u00e0i h\u01a1n.<\/p>\n<p>V\u00ed d\u1ee5, m\u01b0\u1eddi d\u00e2y trung t\u00ednh \u0111\u1ea7u ra c\u1ed9ng v\u1edbi hai d\u00e2y d\u1ef1 ph\u00f2ng y\u00eau c\u1ea7u m\u01b0\u1eddi hai v\u1ecb tr\u00ed \u0111\u1ea7u ra c\u00f3 th\u1ec3 s\u1eed d\u1ee5ng, ngo\u00e0i k\u1ebft n\u1ed1i \u0111\u1ea7u v\u00e0o. X\u00e1c nh\u1eadn c\u00e1ch b\u1ea3n v\u1ebd \u0111\u00e3 ch\u1ecdn ph\u00e2n b\u1ed5 ch\u00fang; \u0111\u1eebng cho r\u1eb1ng <code>+1<\/code> ho\u1eb7c <code>+2<\/code> h\u1eadu t\u1ed1 x\u00e1c l\u1eadp c\u00f4ng su\u1ea5t d\u00e2y \u0111\u1ea7u v\u00e0o. Gi\u1eef d\u00e2y trung t\u00ednh c\u1ee7a m\u1ed7i m\u1ea1ch \u0111\u01b0\u1ee3c b\u1ea3o v\u1ec7 tr\u00ean \u0111\u01b0\u1eddng d\u1eabn \u0111\u00e3 ch\u1ec9 \u0111\u1ecbnh c\u1ee7a n\u00f3.<\/p>\n<p>Sau khi \u0111\u1ebfm s\u1ed1 v\u1ecb tr\u00ed, h\u00e3y ki\u1ec3m tra kh\u1ea3 n\u0103ng ti\u1ebfp nh\u1eadn d\u00e2y d\u1eabn, c\u00f4ng t\u00e1c chu\u1ea9n b\u1ecb, m\u00f4-men xo\u1eafn, vi\u1ec7c l\u1eafp \u0111\u1eb7t, kho\u1ea3ng h\u1edf v\u00e0 c\u00f4ng su\u1ea5t d\u1ef1a tr\u00ean c\u00e1c t\u00e0i li\u1ec7u l\u1eafp r\u00e1p ch\u00ednh x\u00e1c. C\u00e1c l\u1ed7 d\u1ef1 ph\u00f2ng cung c\u1ea5p v\u1ecb tr\u00ed m\u1edf r\u1ed9ng, kh\u00f4ng ph\u1ea3i c\u01b0\u1eddng \u0111\u1ed9 d\u00f2ng \u0111i\u1ec7n d\u1ef1 ph\u00f2ng. N\u1ebfu c\u00f4ng vi\u1ec7c th\u1ef1c s\u1ef1 y\u00eau c\u1ea7u m\u1ed9t c\u1ee5m kh\u1ed1i \u0111\u1ea5u n\u1ed1i \u0111\u01b0\u1ee3c l\u1eafp ri\u00eang bi\u1ec7t, h\u00e3y s\u1eed d\u1ee5ng <a href=\"https:\/\/kaseey.com\/vi\/blog\/brass-terminal-block-selection-guide\">H\u01b0\u1edbng d\u1eabn L\u1ef1a ch\u1ecdn Kh\u1ed1i \u0111\u1ea5u n\u1ed1i \u0110\u1ed3ng thau<\/a>; \u0111\u00f3 l\u00e0 m\u1ed9t l\u1ed9 tr\u00ecnh l\u1ef1a ch\u1ecdn s\u1ea3n ph\u1ea9m kh\u00e1c.<\/p>\n<figure class=\"wp-block-image\">\n<img decoding=\"async\" src=\"https:\/\/kaseey.com\/wp-content\/uploads\/2026\/11\/brass-vs-copper-neutral-bar-selection.webp\" alt=\"Annotated Kaseey T15 brass bar showing conductor entries, screw positions and the bar profile as separate selection checks\"><figcaption>\u0110\u01b0\u1ee3c ch\u1ec9nh s\u1eeda t\u1eeb thanh ng\u1eafn h\u01a1n trong \u1ea3nh s\u1ea3n ph\u1ea9m T15 c\u1ee7a Kaseey. C\u00e1c nh\u00e3n t\u00ednh n\u0103ng x\u00e1c \u0111\u1ecbnh nh\u1eefng g\u00ec c\u1ea7n ki\u1ec3m tra; thanh trong \u1ea3nh kh\u00f4ng \u0111\u01b0\u1ee3c tr\u00ecnh b\u00e0y nh\u01b0 m\u1eabu \u0111\u1eb7t h\u00e0ng 12-\u0111\u01b0\u1eddng trong v\u00ed d\u1ee5.<\/figcaption><\/figure>\n<h2>V\u00ed d\u1ee5 th\u1ef1c t\u1ebf: b\u1ea3ng \u0111i\u1ec7n m\u1ed9t pha v\u1edbi m\u01b0\u1eddi d\u00e2y trung t\u00ednh \u0111\u1ea7u ra<\/h2>\n<p><strong>C\u00e1c gi\u1ea3 \u0111\u1ecbnh, kh\u00f4ng ph\u1ea3i x\u1ebfp h\u1ea1ng c\u1ee7a Kaseey:<\/strong> m\u1ed9t nh\u00e0 thi\u1ebft k\u1ebf \u0111\u00e3 thi\u1ebft l\u1eadp nhu c\u1ea7u d\u00f2ng \u0111i\u1ec7n tr\u1edf v\u1ec1 \u0111\u1ed3ng th\u1eddi t\u1ed1i \u0111a l\u00e0 32 A cho m\u1ed9t b\u1ea3ng m\u1ea1ch m\u1ed9t pha; c\u00e1c d\u00e2y d\u1eabn ngu\u1ed3n pha v\u00e0 trung t\u00ednh \u0111\u1ec1u l\u00e0 \u0111\u1ed3ng 6 mm2, v\u1edbi s\u1ef1 ph\u00f9 h\u1ee3p khi l\u1eafp \u0111\u1eb7t c\u1ee7a ch\u00fang \u0111\u01b0\u1ee3c ki\u1ec3m tra ri\u00eang bi\u1ec7t. M\u01b0\u1eddi m\u1ea1ch \u0111\u1ea7u ra m\u1ed7i m\u1ea1ch y\u00eau c\u1ea7u m\u1ed9t c\u1ef1c trung t\u00ednh v\u00e0 hai v\u1ecb tr\u00ed m\u1ea1ch trong t\u01b0\u01a1ng lai \u0111\u01b0\u1ee3c d\u00e0nh ri\u00eang. C\u00e1c d\u00e2y d\u1eabn \u0111\u1ea7u ra \u0111\u01b0\u1ee3c gi\u1ea3 \u0111\u1ecbnh l\u00e0 \u0111\u1ed3ng 2.5 mm2. Nhi\u1ec7t \u0111\u1ed9 m\u00f4i tr\u01b0\u1eddng c\u1ee7a v\u1ecf t\u1ee7 \u0111i\u1ec7n d\u1ef1 ki\u1ebfn l\u00e0 40 C, v\u00e0 nhu c\u1ea7u thi\u1ebft k\u1ebf \u0111\u1ea7y \u0111\u1ee7 c\u00f3 th\u1ec3 k\u00e9o d\u00e0i trong v\u00e0i gi\u1edd. C\u00e1c th\u00f4ng tin \u0111\u1ea7u v\u00e0o c\u1ee7a d\u1ef1 \u00e1n n\u00e0y ph\u1ea3i \u0111\u01b0\u1ee3c ki\u1ec3m tra \u0111\u1ed1i chi\u1ebfu v\u1edbi b\u1ea3ng t\u1ea3i cu\u1ed1i c\u00f9ng.<\/p>\n<table>\n<thead>\n<tr>\n<th>B\u01b0\u1edbc l\u1ef1a ch\u1ecdn<\/th>\n<th>K\u1ebft qu\u1ea3 v\u00ed d\u1ee5<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>X\u00e1c \u0111\u1ecbnh nhu c\u1ea7u trung t\u00ednh<\/td>\n<td>S\u1eed d\u1ee5ng 32 A th\u00f4ng qua k\u1ebft n\u1ed1i trung t\u00ednh \u0111\u1ea7u v\u00e0o; kh\u00f4ng \u0111\u01b0\u1ee3c chi\u1ebft kh\u1ea5u v\u00ec thanh n\u00e0y \u0111\u01b0\u1ee3c d\u00e1n nh\u00e3n trung t\u00ednh.<\/td>\n<\/tr>\n<tr>\n<td>\u00c1p d\u1ee5ng quy t\u1eafc d\u00e2y d\u1eabn trung t\u00ednh<\/td>\n<td>Gi\u1eef nguy\u00ean to\u00e0n b\u1ed9 d\u00e2y trung t\u00ednh 6 mm2; tr\u01b0\u1eddng h\u1ee3p m\u1ed9t pha kh\u00f4ng s\u1eed d\u1ee5ng d\u00e2y trung t\u00ednh gi\u1ea3m. \u0110i\u1ec1u n\u00e0y kh\u00f4ng ch\u1ec9 \u0111\u1ecbnh ph\u1ea7n thanh \u0111\u1ed3ng thau.<\/td>\n<\/tr>\n<tr>\n<td>\u0110\u1ebfm v\u1ecb tr\u00ed<\/td>\n<td>10 v\u1ecb tr\u00ed l\u00e0m vi\u1ec7c + 2 v\u1ecb tr\u00ed \u0111\u1ea7u ra d\u1ef1 ph\u00f2ng, c\u1ed9ng v\u1edbi m\u1ed9t \u0111\u1ea7u cu\u1ed1i \u0111\u1ea7u v\u00e0o \u0111\u00e3 \u0111\u01b0\u1ee3c ghi l\u1ea1i.<\/td>\n<\/tr>\n<tr>\n<td>S\u1eed d\u1ee5ng b\u1ea3ng s\u1ea3n ph\u1ea9m<\/td>\n<td>L\u1eadp danh s\u00e1ch r\u00fat g\u1ecdn T15A-0609\/12+1. Gi\u1eef T15A-0812\/12+1 l\u00e0m c\u1ea5u h\u00ecnh thay th\u1ebf \u0111\u1ec3 \u0111\u00e1nh gi\u00e1. C\u1ea3 hai \u0111\u1ec1u c\u00f3 12 \u0111\u01b0\u1eddng d\u1eabn \u0111\u00e3 c\u00f4ng b\u1ed1.<\/td>\n<\/tr>\n<tr>\n<td>Ki\u1ec3m tra c\u00e1c k\u1ebft n\u1ed1i<\/td>\n<td>Y\u00eau c\u1ea7u s\u1ef1 ch\u1ea5p thu\u1eadn r\u00f5 r\u00e0ng \u0111\u1ed1i v\u1edbi c\u00e1c d\u00e2y d\u1eabn \u0111\u1ea7u v\u00e0o 6 mm2 v\u00e0 d\u00e2y d\u1eabn \u0111\u1ea7u ra 2.5 mm2, c\u1ea5u t\u1ea1o v\u00e0 c\u00e1ch chu\u1ea9n b\u1ecb c\u1ee7a ch\u00fang. C\u1ea3 \u0111\u01b0\u1eddng k\u00ednh l\u1ed7 5.2 l\u1eabn 6.0 mm \u0111\u1ec1u kh\u00f4ng thay th\u1ebf cho s\u1ef1 ch\u1ea5p thu\u1eadn n\u00e0y.<\/td>\n<\/tr>\n<tr>\n<td>Ho\u00e0n t\u1ea5t y\u00eau c\u1ea7u v\u1ec1 nhi\u1ec7t<\/td>\n<td>Y\u00eau c\u1ea7u b\u1eb1ng ch\u1ee9ng bao g\u1ed3m \u00edt nh\u1ea5t nhi\u1ec7m v\u1ee5 thi\u1ebft k\u1ebf 32 A t\u1ea1i c\u00e1c \u0111i\u1ec1u ki\u1ec7n l\u1eafp \u0111\u1eb7t \u0111\u00e3 ch\u1ec9 \u0111\u1ecbnh, bao g\u1ed3m m\u00f4i tr\u01b0\u1eddng v\u1ecf b\u1ecdc 40 C v\u00e0 t\u1ea3i duy tr\u00ec.<\/td>\n<\/tr>\n<tr>\n<td>\u0110\u01b0a ra quy\u1ebft \u0111\u1ecbnh ph\u00ea duy\u1ec7t<\/td>\n<td>Kh\u00f4ng h\u00e0ng n\u00e0o c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c ph\u00ea duy\u1ec7t ch\u1ec9 d\u1ef1a tr\u00ean k\u00edch th\u01b0\u1edbc c\u00f4ng khai. Ch\u1ec9 ch\u1ecdn \u1ee9ng vi\u00ean 6 x 9 n\u1ebfu d\u1eef li\u1ec7u \u0111\u01b0\u1ee3c ki\u1ec3m so\u00e1t x\u00e1c nh\u1eadn t\u1ea5t c\u1ea3 c\u00e1c y\u00eau c\u1ea7u; n\u1ebfu kh\u00f4ng, h\u00e3y \u0111\u00e1nh gi\u00e1 c\u1ee5m l\u1eafp r\u00e1p 8 x 12 ho\u1eb7c m\u1ed9t gi\u1ea3i ph\u00e1p b\u1eb1ng \u0111\u1ed3ng \u0111\u00e3 \u0111\u01b0\u1ee3c ghi nh\u1eadn.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>K\u1ebft qu\u1ea3 l\u00e0 m\u1ed9t danh s\u00e1ch r\u00fat g\u1ecdn c\u1ee5 th\u1ec3, c\u00f3 th\u1ec3 xem x\u00e9t v\u00e0 m\u1ed9t y\u00eau c\u1ea7u \u0111\u1ea1t\/kh\u00f4ng \u0111\u1ea1t r\u00f5 r\u00e0ng, kh\u00f4ng ph\u1ea3i l\u00e0 quy t\u1eafc \u201c6 x 9 = 32 A\u201d t\u1ef1 ch\u1ebf. N\u1ebfu kh\u00f4ng c\u00f3 \u1ee9ng vi\u00ean n\u00e0o c\u00f3 t\u00e0i li\u1ec7u \u0111\u1ea7y \u0111\u1ee7, k\u1ebft qu\u1ea3 \u0111\u00fang l\u00e0 t\u1ea1m d\u1eebng ph\u00ea duy\u1ec7t linh ki\u1ec7n. C\u00e1c v\u1ecb tr\u00ed d\u1ef1 ph\u00f2ng c\u0169ng y\u00eau c\u1ea7u \u0111\u00e1nh gi\u00e1 t\u1ea3i m\u1edbi tr\u01b0\u1edbc khi c\u00e1c m\u1ea1ch \u0111i\u1ec7n t\u01b0\u01a1ng lai \u0111\u01b0\u1ee3c k\u1ebft n\u1ed1i.<\/p>\n<p>\u0110\u1ed1i v\u1edbi c\u1ee5m l\u1eafp r\u00e1p s\u1eed d\u1ee5ng khung IEC 61439, <a href=\"https:\/\/webstore.iec.ch\/en\/publication\/32338\" target=\"_blank\" rel=\"noopener\">IEC 61439-1:2020<\/a> quy \u0111\u1ecbnh c\u00e1c y\u00eau c\u1ea7u chung v\u1ec1 c\u1ea5u t\u1ea1o v\u00e0 ki\u1ec3m tra c\u00f9ng v\u1edbi b\u1ed9 ph\u1eadn l\u1eafp r\u00e1p li\u00ean quan. Vi\u1ec7c t\u00ednh to\u00e1n v\u1eadt li\u1ec7u kh\u00f4ng ho\u00e0n th\u00e0nh vi\u1ec7c ki\u1ec3m tra \u0111\u00f3.<\/p>\n<h2>Khi n\u00e0o n\u00ean d\u00f9ng \u0111\u1ed3ng \u0111\u1ecf v\u00e0 khi n\u00e0o \u0111\u1ed3ng thau l\u00e0 \u0111\u1ee7<\/h2>\n<table>\n<thead>\n<tr>\n<th>Nhi\u1ec7m v\u1ee5 trung t\u00ednh ho\u1eb7c r\u00e0ng bu\u1ed9c thi\u1ebft k\u1ebf<\/th>\n<th>Quy\u1ebft \u0111\u1ecbnh v\u1eadt li\u1ec7u<\/th>\n<th>B\u1eb1ng ch\u1ee9ng gi\u1ea3i quy\u1ebft v\u1ea5n \u0111\u1ec1<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>B\u1ea3ng ph\u00e2n ph\u1ed1i th\u00f4ng th\u01b0\u1eddng v\u1edbi nhu c\u1ea7u trung t\u00ednh \u0111\u01b0\u1ee3c x\u00e1c minh v\u1eeba ph\u1ea3i<\/td>\n<td>\u0110\u1ed3ng thau l\u00e0 \u1ee9ng c\u1eed vi\u00ean \u0111\u1ea7u ti\u00ean h\u1ee3p l\u00fd v\u00e0 c\u00f3 th\u1ec3 mang l\u1ea1i chi ph\u00ed b\u1ed9 ph\u1eadn ho\u00e0n ch\u1ec9nh th\u1ea5p h\u01a1n.<\/td>\n<td>B\u1ed9 ph\u1eadn l\u1eafp r\u00e1p b\u1eb1ng \u0111\u1ed3ng thau ch\u00ednh x\u00e1c \u0111\u00e1p \u1ee9ng c\u00e1c y\u00eau c\u1ea7u v\u1ec1 d\u00f2ng \u0111i\u1ec7n, k\u1ebft n\u1ed1i v\u00e0 nhi\u1ec7t \u0111\u1ed9.<\/td>\n<\/tr>\n<tr>\n<td>Nhi\u1ec1u t\u1ea3i \u0111i\u1ec7n t\u1eed m\u1ed9t pha tr\u00ean ba pha<\/td>\n<td>\u0110\u00e1nh gi\u00e1 \u0111\u1ed3ng s\u1edbm n\u1ebfu c\u00e1c s\u00f3ng h\u00e0i t\u1ea1o ra t\u1ea3i trung t\u00ednh n\u1eb7ng.<\/td>\n<td>Ph\u1ed5 s\u00f3ng h\u00e0i, d\u00f2ng \u0111i\u1ec7n RMS trung t\u00ednh t\u1ed1i \u0111a v\u00e0 \u0111\u00e1nh gi\u00e1 nhi\u1ec7t l\u1eafp \u0111\u1eb7t.<\/td>\n<\/tr>\n<tr>\n<td>D\u00f2ng \u0111i\u1ec7n trung t\u00ednh cao trong m\u1ed9t v\u1ecf t\u1ee7 nh\u1ecf g\u1ecdn<\/td>\n<td>\u0110i\u1ec7n tr\u1edf kh\u1ed1i th\u1ea5p h\u01a1n c\u1ee7a \u0111\u1ed3ng c\u00f3 th\u1ec3 c\u00f3 gi\u00e1 tr\u1ecb \u1edf nh\u1eefng n\u01a1i kh\u00f4ng th\u1ec3 l\u1eafp v\u1eeba ti\u1ebft di\u1ec7n \u0111\u1ed3ng thau l\u1edbn h\u01a1n.<\/td>\n<td>C\u1ee5m \u0111\u1ed3ng ho\u00e0n ch\u1ec9nh v\u1eeba v\u1eb7n v\u00e0 \u0111\u00e1p \u1ee9ng nhi\u1ec7m v\u1ee5 \u0111\u01b0\u1ee3c ch\u1ec9 \u0111\u1ecbnh.<\/td>\n<\/tr>\n<tr>\n<td>Th\u1eddi gian d\u00e0i g\u1ea7n t\u1ea3i thi\u1ebft k\u1ebf trung t\u00ednh \u0111\u1ea7y \u0111\u1ee7<\/td>\n<td>So s\u00e1nh t\u1ed5n th\u1ea5t v\u00e0 nhi\u1ec7t \u0111\u1ed9 duy tr\u00ec; \u0111\u1ed3ng c\u00f3 th\u1ec3 bi\u1ec7n minh cho chi ph\u00ed ban \u0111\u1ea7u b\u1ed5 sung.<\/td>\n<td>So s\u00e1nh nhi\u1ec7m v\u1ee5 t\u01b0\u01a1ng \u0111\u01b0\u01a1ng, bao g\u1ed3m c\u00e1c m\u1ed1i n\u1ed1i, l\u00e0m m\u00e1t v\u00e0 s\u1ed1 gi\u1edd v\u1eadn h\u00e0nh.<\/td>\n<\/tr>\n<tr>\n<td>\u1ee8ng vi\u00ean b\u1eb1ng \u0111\u1ed3ng thau kh\u00f4ng \u0111\u1ea1t gi\u1edbi h\u1ea1n \u0111\u1ed9 t\u0103ng nhi\u1ec7t ho\u1eb7c t\u1ed5n hao cho ph\u00e9p<\/td>\n<td>Thay \u0111\u1ed5i thi\u1ebft k\u1ebf. C\u1ea7n s\u1eed d\u1ee5ng \u0111\u1ed3ng n\u1ebfu \u0111\u00f3 l\u00e0 gi\u1ea3i ph\u00e1p \u0111\u00e3 \u0111\u01b0\u1ee3c ph\u00ea duy\u1ec7t \u0111\u00e1p \u1ee9ng c\u00e1c r\u00e0ng bu\u1ed9c; m\u1ed9t thi\u1ebft k\u1ebf b\u1eb1ng \u0111\u1ed3ng thau l\u1edbn h\u01a1n \u0111\u00e3 \u0111\u01b0\u1ee3c ki\u1ec3m ch\u1ee9ng c\u0169ng c\u00f3 th\u1ec3 hi\u1ec7u qu\u1ea3.<\/td>\n<td>Vi\u1ec7c x\u00e1c minh d\u00e0nh cho c\u1ee5m l\u1eafp r\u00e1p \u0111\u00e3 s\u1eeda \u0111\u1ed5i, kh\u00f4ng ph\u1ea3i l\u00e0 vi\u1ec7c thay \u0111\u1ed5i v\u1eadt li\u1ec7u c\u00f9ng k\u00edch th\u01b0\u1edbc.<\/td>\n<\/tr>\n<tr>\n<td>Th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt c\u1ee7a b\u1ea3ng \u0111i\u1ec1u khi\u1ec3n y\u00eau c\u1ea7u s\u1eed d\u1ee5ng \u0111\u1ed3ng<\/td>\n<td>S\u1eed d\u1ee5ng c\u1ee5m l\u1eafp r\u00e1p b\u1eb1ng \u0111\u1ed3ng \u0111\u00e3 \u0111\u01b0\u1ee3c ch\u1ec9 \u0111\u1ecbnh tr\u1eeb khi c\u00f3 thay \u0111\u1ed5i thi\u1ebft k\u1ebf ch\u00ednh th\u1ee9c \u0111\u01b0\u1ee3c ph\u00ea duy\u1ec7t.<\/td>\n<td>Th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt c\u1ee7a b\u1ea3ng \u0111i\u1ec1u khi\u1ec3n v\u00e0 t\u00e0i li\u1ec7u linh ki\u1ec7n \u0111\u00e3 \u0111\u01b0\u1ee3c ph\u00ea duy\u1ec7t.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>Vi\u1ec7c so s\u00e1nh chi ph\u00ed mang t\u00ednh \u0111\u1ecbnh t\u00ednh. H\u00e3y so s\u00e1nh c\u00e1c c\u1ee5m l\u1eafp r\u00e1p ho\u00e0n thi\u1ec7n v\u1edbi c\u00e1c k\u1ebft n\u1ed1i, gi\u00e1 \u0111\u1ee1, ki\u1ec3m tra v\u00e0 nhi\u1ec7m v\u1ee5 t\u01b0\u01a1ng \u0111\u01b0\u01a1ng; kh\u00f4ng c\u00f3 gi\u00e1 kim lo\u1ea1i th\u00f4 ho\u1eb7c t\u1ef7 l\u1ec7 ti\u1ebft ki\u1ec7m chung n\u00e0o x\u00e1c \u0111\u1ecbnh \u0111\u01b0\u1ee3c gi\u1ea3i ph\u00e1p r\u1ebb h\u01a1n \u0111\u00e3 \u0111\u01b0\u1ee3c ph\u00ea duy\u1ec7t.<\/p>\n<h2>Nh\u1eefng sai l\u1ea7m ph\u1ed5 bi\u1ebfn khi ch\u1ecdn k\u00edch th\u01b0\u1edbc thanh trung t\u00ednh<\/h2>\n<ul>\n<li><strong>Ch\u1ec9 l\u1ef1a ch\u1ecdn theo s\u1ed1 \u0111\u01b0\u1eddng.<\/strong> M\u01b0\u1eddi hai v\u1ecb tr\u00ed c\u00f3 s\u1eb5n cho bi\u1ebft n\u01a1i d\u00e2y d\u1eabn c\u00f3 th\u1ec3 \u0111\u1ea5u n\u1ed1i, ch\u1ee9 kh\u00f4ng ph\u1ea3i l\u01b0\u1ee3ng d\u00f2ng \u0111i\u1ec7n h\u1ed3i m\u00e0 c\u1ee5m thi\u1ebft b\u1ecb c\u00f3 th\u1ec3 t\u1ea3i.<\/li>\n<li><strong>Thay th\u1ebf \u0111\u1ed3ng b\u1eb1ng \u0111\u1ed3ng thau v\u1edbi c\u00f9ng k\u00edch th\u01b0\u1edbc.<\/strong> \u1ede c\u00f9ng chi\u1ec1u d\u00e0i v\u00e0 nhi\u1ec7t \u0111\u1ed9, \u0111\u1ed3ng thau 28% IACS minh h\u1ecda c\u00f3 \u0111i\u1ec7n tr\u1edf su\u1ea5t g\u1ea5p kho\u1ea3ng 3.57 l\u1ea7n so v\u1edbi \u0111\u1ed3ng 100% IACS tham chi\u1ebfu. H\u00e3y ki\u1ec3m tra l\u1ea1i to\u00e0n b\u1ed9 thi\u1ebft k\u1ebf thay v\u00ec sao ch\u00e9p k\u00edch th\u01b0\u1edbc.<\/li>\n<li><strong>Coi m\u1ed9t c\u1ea5u h\u00ecnh t\u1ed5ng th\u1ec3 l\u00e0 m\u1ed9t v\u1eadt d\u1eabn \u0111i\u1ec7n li\u00ean t\u1ee5c.<\/strong> Ph\u00e9p t\u00ednh bao ngo\u00e0i 54 ho\u1eb7c 96 mm2 b\u1ecf qua c\u00e1c l\u1ed7, s\u1ef1 t\u1eadp trung d\u00f2ng \u0111i\u1ec7n c\u1ee5c b\u1ed9 v\u00e0 c\u00e1c k\u1ebft n\u1ed1i.<\/li>\n<li><strong>Gi\u1ea3 \u0111\u1ecbnh c\u00e2n b\u1eb1ng pha gi\u00fap lo\u1ea1i b\u1ecf hi\u1ec7n t\u01b0\u1ee3ng n\u00f3ng d\u00e2y trung t\u00ednh.<\/strong> S\u1ef1 c\u00e2n b\u1eb1ng c\u01a1 b\u1ea3n kh\u00f4ng tri\u1ec7t ti\u00eau c\u00e1c th\u00e0nh ph\u1ea7n h\u00e0i b\u1eadc ba c\u00e2n b\u1eb1ng.<\/li>\n<li><strong>\u0110\u1ed5 l\u1ed7i cho \u0111\u1ed3ng thau l\u00e0 nguy\u00ean nh\u00e2n g\u00e2y ra m\u1ecdi t\u00ecnh tr\u1ea1ng qu\u00e1 nhi\u1ec7t.<\/strong> A hot connection may involve poor contact pressure, unsuitable conductor preparation, overload, harmonics or enclosure conditions. A localized hot joint suggests a different investigation from heating spread along the bar; neither observation alone proves the cause. The <a href=\"https:\/\/www.kupfer.de\/wp-content\/uploads\/2019\/11\/Copper-for-Busbars.pdf\" target=\"_blank\" rel=\"noopener\">busbar handbook&#8217;s joint guidance<\/a> explains the importance of contact surfaces and pressure. Inspect de-energized equipment under the applicable safe-work procedure; do not substitute copper to conceal an unresolved connection problem.<\/li>\n<li><strong>Treating a wire-reduction allowance as a bar rating.<\/strong> IEC wiring-conductor rules and the manufacturer&#8217;s terminal-bar verification answer different questions.<\/li>\n<\/ul>\n<h2>C\u00e2u h\u1ecfi th\u01b0\u1eddng g\u1eb7p<\/h2>\n<h3>Is brass or copper better for a neutral bar?<\/h3>\n<p>Brass is a practical starting point for an ordinary distribution board when the exact terminal-bar assembly meets its neutral-current and temperature requirements. Copper is attractive when high neutral current, sustained loading or limited space makes lower bulk resistance valuable. Neither material is automatically approved by its name; select the documented assembly for the actual duty.<\/p>\n<h3>How much larger must a brass neutral bar be than copper?<\/h3>\n<p>There is no universal approved size multiplier. For equal length, temperature and bulk resistance, a solid 28% IACS brass section needs about 3.57 times the area of a 100% IACS copper reference. That calculation does not rate a drilled neutral bar: alloy, holes, terminals, cooling and installed temperature limits still determine suitability.<\/p>\n<h3>Can a neutral bar be smaller than the phase conductor?<\/h3>\n<p>Do not compare a brass bar&#8217;s outer section directly with a copper cable section. IEC 60364-5-52 Clause 524 addresses wiring conductors, with restrictions on reducing the neutral and separate harmonic provisions. A neutral-bar assembly must independently carry the calculated neutral duty and accept its connected conductors, whether or not cable reduction is permitted.<\/p>\n<h3>How many amps can a 6 x 9 mm brass neutral bar carry?<\/h3>\n<p>The dimensions alone do not establish an ampere rating. Kaseey&#8217;s public T15 table lists the 6 x 9 profile, ways and hole diameter but no model-specific current rating. Check the datasheet for the selected reference, connected conductors, temperature conditions, mounting and enclosure arrangement before approving a current duty.<\/p>\n<h3>How many ways should a neutral bar have?<\/h3>\n<p>Provide one approved terminal for each outgoing neutral conductor, add the agreed spare positions, and account separately for the incoming neutral connection. Ten outgoing neutrals plus two spares need twelve usable outgoing positions. Verify the actual drawing and conductor acceptance; extra holes do not increase the electrical rating or authorize two neutrals under one screw.<\/p>\n<h2>X\u00e1c \u0111\u1ecbnh c\u00f4ng su\u1ea5t tr\u01b0\u1edbc khi \u0111\u1eb7t h\u00e0ng<\/h2>\n<p>Send Kaseey the calculated neutral current, harmonic assumptions, sustained-load duration, enclosure conditions and termination schedule with the candidate reference through the <a href=\"https:\/\/kaseey.com\/vi\/contact\">trang li\u00ean h\u1ec7<\/a>. Ask for the current controlled datasheet and configuration-specific confirmation. That is the evidence needed to turn a dimensional shortlist into a selected neutral bar.<\/p>\n<h2>T\u00e0i li\u1ec7u tham kh\u1ea3o<\/h2>\n<p>Sources and product pages checked on <strong>November 5, 2026<\/strong>. Material data is grade-specific. Kaseey&#8217;s public product tables provide dimensional evidence; unpublished electrical fields remain subject to the controlled datasheet. IEC requirements must be applied using the edition adopted for the project.<\/p>\n<ul>\n<li><a href=\"https:\/\/alloys.copper.org\/alloy\/C26000\" target=\"_blank\" rel=\"noopener\">C26000 Cartridge Brass, 70%<\/a> &#8211; Copper Development Association; supports the 28% IACS material reference at 20 C.<\/li>\n<li><a href=\"https:\/\/alloys.copper.org\/alloy\/C36000\" target=\"_blank\" rel=\"noopener\">C36000 \u0110\u1ed3ng thau c\u1eaft t\u1ef1 do<\/a> &#8211; Copper Development Association; supports the 26% IACS alternative brass reference.<\/li>\n<li><a href=\"https:\/\/alloys.copper.org\/alloy\/C11000\" target=\"_blank\" rel=\"noopener\">C11000 \u0110\u1ed3ng \u0111i\u1ec7n ph\u00e2n ETP<\/a> &#8211; Copper Development Association; supports the listed 101% IACS value and 100% annealed minimum.<\/li>\n<li><a href=\"https:\/\/www.kupfer.de\/wp-content\/uploads\/2019\/11\/Copper-for-Busbars.pdf\" target=\"_blank\" rel=\"noopener\">\u0110\u1ed3ng cho Thanh c\u00e1i: H\u01b0\u1edbng d\u1eabn Thi\u1ebft k\u1ebf v\u00e0 L\u1eafp \u0111\u1eb7t<\/a> &#8211; Copper Development Association and European Copper Institute, revised May 2014; sections 2.2 and 6 support thermal and joint-design considerations.<\/li>\n<li><a href=\"https:\/\/standards.theiteh.com\/catalog\/standards\/iec\/d2a8f670-f7ae-489f-9949-87bc2a3b8988\/iec-60364-5-52-2009-amd1-2024\" target=\"_blank\" rel=\"noopener\">IEC 60364-5-52:2009\/AMD1:2024, Amendment 1<\/a> &#8211; International Electrotechnical Commission, 2024; original amendment text reproduced in the standards distributor&#8217;s sample, Clauses 524.2, 524.3 and Annex E.<\/li>\n<li><a href=\"https:\/\/webstore.iec.ch\/en\/publication\/32338\" target=\"_blank\" rel=\"noopener\">IEC 61439-1:2020: Low-voltage switchgear and controlgear assemblies &#8211; Part 1: General rules<\/a> &#8211; International Electrotechnical Commission; catalogue scope supports the assembly-verification boundary, not a Kaseey product approval.<\/li>\n<li><a href=\"https:\/\/kaseey.com\/vi\/brass-bars\/brass-bar-t15-series\">Thanh \u0110\u1ed3ng T15A \/ T15B<\/a> &#8211; Kaseey; public technical model matrix and product photograph, no revision number displayed. Supports profiles, ways and diameter data.<\/li>\n<li><a href=\"https:\/\/kaseey.com\/vi\/copper-bars\/copper-bar-kb-series\">Thanh \u0111\u1ed3ng d\u00f2ng KB<\/a> &#8211; Kaseey; public technical table and product photograph, no revision number displayed. Supports the cited copper-bar dimensions, not a neutral-assembly current rating.<\/li>\n<\/ul>","protected":false},"excerpt":{"rendered":"<p>Short Answer For most ordinary distribution-board neutral-bar selections, start with brass: an appropriately rated brass terminal bar is often sufficient and can be the more economical finished-part choice. This is a selection starting point, not a claim that every brass bar suits every board. Choose copper when the available brass assembly cannot meet the required [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":4831,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[34],"tags":[],"class_list":["post-4832","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-brass-bars"],"_links":{"self":[{"href":"https:\/\/kaseey.com\/vi\/wp-json\/wp\/v2\/posts\/4832","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/kaseey.com\/vi\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/kaseey.com\/vi\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/kaseey.com\/vi\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/kaseey.com\/vi\/wp-json\/wp\/v2\/comments?post=4832"}],"version-history":[{"count":1,"href":"https:\/\/kaseey.com\/vi\/wp-json\/wp\/v2\/posts\/4832\/revisions"}],"predecessor-version":[{"id":4833,"href":"https:\/\/kaseey.com\/vi\/wp-json\/wp\/v2\/posts\/4832\/revisions\/4833"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/kaseey.com\/vi\/wp-json\/wp\/v2\/media\/4831"}],"wp:attachment":[{"href":"https:\/\/kaseey.com\/vi\/wp-json\/wp\/v2\/media?parent=4832"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/kaseey.com\/vi\/wp-json\/wp\/v2\/categories?post=4832"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/kaseey.com\/vi\/wp-json\/wp\/v2\/tags?post=4832"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}