{"id":20854,"date":"2025-12-15T10:21:45","date_gmt":"2025-12-15T02:21:45","guid":{"rendered":"https:\/\/viox.com\/?p=20854"},"modified":"2025-12-15T10:21:47","modified_gmt":"2025-12-15T02:21:47","slug":"40a-vs-63a-rcd-nuisance-tripping-guide","status":"publish","type":"post","link":"https:\/\/test.viox.com\/vi\/40a-vs-63a-rcd-nuisance-tripping-guide\/","title":{"rendered":"RCD 40A so v\u1edbi 63A: N\u00e2ng c\u1ea5p \u0111\u1ecbnh m\u1ee9c c\u00f3 kh\u1eafc ph\u1ee5c \u0111\u01b0\u1ee3c t\u00ecnh tr\u1ea1ng nh\u1ea3y aptomat kh\u00f4ng mong mu\u1ed1n kh\u00f4ng?"},"content":{"rendered":"<div class=\"product-intro\">\n<p>M\u1ed9t nh\u00e0 th\u1ea7u b\u01b0\u1edbc v\u00e0o v\u0103n ph\u00f2ng c\u1ee7a ng\u01b0\u1eddi qu\u1ea3n l\u00fd c\u01a1 s\u1edf. \u201cC\u00e1i RCD c\u1ee9 nh\u1ea3y li\u00ean t\u1ee5c trong ph\u00f2ng m\u00e1y ch\u1ee7,\u201d ng\u01b0\u1eddi qu\u1ea3n l\u00fd n\u00f3i. \u201cCh\u00fang t\u00f4i \u0111\u00e3 ki\u1ec3m tra m\u1ecdi th\u1ee9. Kh\u00f4ng c\u00f3 l\u1ed7i c\u00e1ch \u0111i\u1ec7n. Nh\u01b0ng n\u00f3 v\u1eabn nh\u1ea3y hai l\u1ea7n m\u1ed9t tu\u1ea7n.\u201d<\/p>\n<p>Nh\u00e0 th\u1ea7u \u0111\u1ed5i RCD 40A th\u00e0nh lo\u1ea1i 63A. Ng\u01b0\u1ee1ng t\u00e1c \u0111\u1ed9ng v\u1eabn l\u00e0 30mA\u2014ch\u1ec9 kh\u00e1c l\u00e0 d\u00f2ng \u0111i\u1ec7n \u0111\u1ecbnh m\u1ee9c cao h\u01a1n. Hai tu\u1ea7n sau: kh\u00f4ng c\u00f2n b\u1ecb nh\u1ea3y n\u1eefa. V\u1ea5n \u0111\u1ec1 bi\u1ebfn m\u1ea5t.<\/p>\n<p>Nh\u01b0ng t\u1ea1i sao? D\u00f2ng \u0111i\u1ec7n t\u00e1c \u0111\u1ed9ng d\u01b0 (I\u0394n) kh\u00f4ng thay \u0111\u1ed5i. V\u1eady t\u1ea1i sao vi\u1ec7c n\u00e2ng c\u1ea5p d\u00f2ng \u0111i\u1ec7n t\u1ea3i \u0111\u1ecbnh m\u1ee9c (In) t\u1eeb 40A l\u00ean 63A \u0111\u00f4i khi l\u1ea1i ng\u0103n ch\u1eb7n \u0111\u01b0\u1ee3c vi\u1ec7c nh\u1ea3y do nhi\u1ec5u?<\/p>\n<p>N\u1ebfu b\u1ea1n \u0111\u00e3 l\u00e0m vi\u1ec7c nhi\u1ec1u n\u0103m trong l\u0129nh v\u1ef1c n\u00e0y, b\u1ea1n s\u1ebd bi\u1ebft \u201cgi\u1ea3i ph\u00e1p\u201d n\u00e0y th\u01b0\u1eddng hi\u1ec7u qu\u1ea3 h\u01a1n l\u00e0 ch\u1ec9 tr\u00f9ng h\u1ee3p ng\u1eabu nhi\u00ean. C\u00e2u tr\u1ea3 l\u1eddi n\u1eb1m \u1edf m\u1ed9t y\u1ebfu t\u1ed1 b\u1ecb b\u1ecf qua: t\u00ednh \u1ed5n \u0111\u1ecbnh nhi\u1ec7t v\u00e0 \u0111\u1ed9 nh\u1ea1y khi l\u1eafp \u0111\u1eb7t d\u01b0\u1edbi t\u1ea3i n\u1eb7ng.<\/p>\n<p>H\u01b0\u1edbng d\u1eabn n\u00e0y gi\u1ea3i th\u00edch t\u1ea1i sao vi\u1ec7c \u0111\u1ed5i t\u1eeb 40A sang 63A \u0111\u00f4i khi hi\u1ec7u qu\u1ea3, t\u1ea1i sao n\u00f3 ch\u1ec9 \u0111ang \u0111i\u1ec1u tr\u1ecb tri\u1ec7u ch\u1ee9ng ch\u1ee9 kh\u00f4ng ph\u1ea3i c\u0103n b\u1ec7nh, v\u00e0 c\u00e1c gi\u1ea3i ph\u00e1p ch\u1ea9n \u0111o\u00e1n ph\u00f9 h\u1ee3p tr\u00f4ng nh\u01b0 th\u1ebf n\u00e0o.<\/p>\n<figure style=\"margin: 20px 0; text-align: center;\"><img decoding=\"async\" style=\"max-width: 100%; height: auto;\" src=\"https:\/\/img.viox.com\/viox-industrial-photograph-of-professional-type-a-rcd-installation-in-metal-distribution-panel-showing-30ma-residual-current-device-mounted-on-din-rail-with-proper-cable-management-and-thermal-imaging-overlay.webp\" alt=\"VIOX industrial photograph of professional Type A RCD installation in metal distribution panel showing 30mA residual current device mounted on DIN rail with proper cable management and thermal imaging overlay\" \/><figcaption style=\"font-style: italic; font-size: 0.9em; color: #666; margin-top: 8px;\">\u1ea2nh c\u00f4ng nghi\u1ec7p VIOX v\u1ec1 vi\u1ec7c l\u1eafp \u0111\u1eb7t RCD lo\u1ea1i A chuy\u00ean nghi\u1ec7p trong t\u1ee7 \u0111i\u1ec7n kim lo\u1ea1i, cho th\u1ea5y thi\u1ebft b\u1ecb d\u00f2ng d\u01b0 30mA \u0111\u01b0\u1ee3c g\u1eafn tr\u00ean thanh DIN v\u1edbi vi\u1ec7c qu\u1ea3n l\u00fd c\u00e1p ph\u00f9 h\u1ee3p v\u00e0 l\u1edbp ph\u1ee7 h\u00ecnh \u1ea3nh nhi\u1ec7t<\/figcaption><\/figure>\n<h2>L\u00fd thuy\u1ebft so v\u1edbi Th\u1ef1c t\u1ebf: Hi\u1ec3u v\u1ec1 In v\u00e0 I\u0394n<\/h2>\n<p>Khi c\u00e1c th\u1ee3 \u0111i\u1ec7n tranh lu\u1eadn v\u1ec1 vi\u1ec7c \u0111\u1ed5i t\u1eeb 40A sang 63A tr\u00ean c\u00e1c di\u1ec5n \u0111\u00e0n nh\u01b0 Mike Holt ho\u1eb7c c\u1ed9ng \u0111\u1ed3ng th\u1ee3 \u0111i\u1ec7n \u00dac, c\u00e1c nh\u00e0 l\u00fd thuy\u1ebft nhanh ch\u00f3ng ch\u1ec9 ra sai s\u00f3t logic. H\u1ecd kh\u1eb3ng \u0111\u1ecbnh b\u1ea1n ph\u1ea3i ph\u00e2n bi\u1ec7t hai th\u00f4ng s\u1ed1 ho\u00e0n to\u00e0n ri\u00eang bi\u1ec7t:<\/p>\n<p><strong>In (D\u00f2ng \u0111i\u1ec7n t\u1ea3i \u0111\u1ecbnh m\u1ee9c):<\/strong> 40A ho\u1eb7c 63A. \u0110i\u1ec1u n\u00e0y x\u00e1c \u0111\u1ecbnh l\u01b0\u1ee3ng d\u00f2ng \u0111i\u1ec7n m\u00e0 c\u00e1c ti\u1ebfp \u0111i\u1ec3m \u0111\u1ed3ng, thanh d\u1eabn v\u00e0 d\u00e2y d\u1eabn b\u00ean trong c\u1ee7a RCD c\u00f3 th\u1ec3 mang li\u00ean t\u1ee5c m\u00e0 kh\u00f4ng b\u1ecb qu\u00e1 nhi\u1ec7t ho\u1eb7c suy gi\u1ea3m. \u0110\u00e2y l\u00e0 \u0111\u1ecbnh m\u1ee9c v\u1ec1 nhi\u1ec7t v\u00e0 c\u01a1 h\u1ecdc.<\/p>\n<p><strong>I\u0394n (D\u00f2ng \u0111i\u1ec7n t\u00e1c \u0111\u1ed9ng d\u01b0 \u0111\u1ecbnh m\u1ee9c):<\/strong> Th\u00f4ng th\u01b0\u1eddng l\u00e0 30mA. \u0110i\u1ec1u n\u00e0y x\u00e1c \u0111\u1ecbnh ng\u01b0\u1ee1ng d\u00f2ng \u0111i\u1ec7n r\u00f2 xu\u1ed1ng \u0111\u1ea5t s\u1ebd khi\u1ebfn thi\u1ebft b\u1ecb t\u00e1c \u0111\u1ed9ng. \u0110\u00e2y l\u00e0 \u0111\u1ecbnh m\u1ee9c \u0111\u1ed9 nh\u1ea1y \u0111i\u1ec7n.<\/p>\n<p>Theo l\u00fd thuy\u1ebft thu\u1ea7n t\u00fay, vi\u1ec7c thay \u0111\u1ed5i In s\u1ebd kh\u00f4ng \u1ea3nh h\u01b0\u1edfng g\u00ec \u0111\u1ebfn I\u0394n. Vi\u1ec7c n\u00e2ng c\u1ea5p l\u00ean 63A kh\u00f4ng l\u00e0m t\u0103ng ng\u01b0\u1ee1ng r\u00f2 r\u1ec9 30mA. N\u1ebfu m\u1ed9t thi\u1ebft b\u1ecb th\u1ef1c s\u1ef1 r\u00f2 35mA xu\u1ed1ng \u0111\u1ea5t, c\u1ea3 phi\u00ean b\u1ea3n 40A v\u00e0 63A \u0111\u1ec1u ph\u1ea3i t\u00e1c \u0111\u1ed9ng. Vi\u1ec7c \u0111\u1ed5i kh\u00f4ng c\u00f3 \u00fd ngh\u0129a g\u00ec\u2014gi\u1ed1ng nh\u01b0 thay \u0111\u1ed9ng c\u01a1 \u00f4 t\u00f4 \u0111\u1ec3 s\u1eeda l\u1ed1p x\u1ecbt.<\/p>\n<p><strong>B\u1ea3ng 1: So s\u00e1nh th\u00f4ng s\u1ed1 \u2013 RCD 40A so v\u1edbi 63A (C\u1ea3 hai \u0111\u1ec1u c\u00f3 I\u0394n 30mA)<\/strong><\/p>\n<table style=\"width: 100%; border-collapse: collapse; margin: 20px 0;\" border=\"1\">\n<thead>\n<tr style=\"background-color: #f9f9f9;\">\n<th style=\"padding: 10px; border: 1px solid #ddd;\">Tham s\u1ed1<\/th>\n<th style=\"padding: 10px; border: 1px solid #ddd;\">RCD 40A<\/th>\n<th style=\"padding: 10px; border: 1px solid #ddd;\">RCD 63A<\/th>\n<th style=\"padding: 10px; border: 1px solid #ddd;\">Thay \u0111\u1ed5i g\u00ec?<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td style=\"padding: 10px; border: 1px solid #ddd;\"><strong>D\u00f2ng \u0111i\u1ec7n t\u1ea3i \u0111\u1ecbnh m\u1ee9c (In)<\/strong><\/td>\n<td style=\"padding: 10px; border: 1px solid #ddd;\">40A<\/td>\n<td style=\"padding: 10px; border: 1px solid #ddd;\">63A<\/td>\n<td style=\"padding: 10px; border: 1px solid #ddd;\">\u2705 T\u0103ng kh\u1ea3 n\u0103ng ch\u1ecbu t\u1ea3i c\u1ee7a ti\u1ebfp \u0111i\u1ec3m\/thanh d\u1eabn<\/td>\n<\/tr>\n<tr>\n<td style=\"padding: 10px; border: 1px solid #ddd;\"><strong>D\u00f2ng \u0111i\u1ec7n t\u00e1c \u0111\u1ed9ng d\u01b0 \u0111\u1ecbnh m\u1ee9c (I\u0394n)<\/strong><\/td>\n<td style=\"padding: 10px; border: 1px solid #ddd;\">30mA<\/td>\n<td style=\"padding: 10px; border: 1px solid #ddd;\">30mA<\/td>\n<td style=\"padding: 10px; border: 1px solid #ddd;\">\u274c Kh\u00f4ng thay \u0111\u1ed5i \u2013 v\u1eabn t\u00e1c \u0111\u1ed9ng \u1edf m\u1ee9c r\u00f2 r\u1ec9 30mA<\/td>\n<\/tr>\n<tr>\n<td style=\"padding: 10px; border: 1px solid #ddd;\"><strong>Ng\u01b0\u1ee1ng t\u00e1c \u0111\u1ed9ng theo IEC 61008<\/strong><\/td>\n<td style=\"padding: 10px; border: 1px solid #ddd;\">15-30mA<\/td>\n<td style=\"padding: 10px; border: 1px solid #ddd;\">15-30mA<\/td>\n<td style=\"padding: 10px; border: 1px solid #ddd;\">\u274c C\u00f9ng m\u1ed9t ph\u1ea1m vi ho\u1ea1t \u0111\u1ed9ng<\/td>\n<\/tr>\n<tr>\n<td style=\"padding: 10px; border: 1px solid #ddd;\"><strong>Kh\u1ea3 n\u0103ng ch\u1ecbu t\u1ea3i li\u00ean t\u1ee5c t\u1ed1i \u0111a<\/strong><\/td>\n<td style=\"padding: 10px; border: 1px solid #ddd;\">40A<\/td>\n<td style=\"padding: 10px; border: 1px solid #ddd;\">63A<\/td>\n<td style=\"padding: 10px; border: 1px solid #ddd;\">\u2705 Kh\u1ea3 n\u0103ng ch\u1ecbu d\u00f2ng \u0111i\u1ec7n duy tr\u00ec cao h\u01a1n<\/td>\n<\/tr>\n<tr>\n<td style=\"padding: 10px; border: 1px solid #ddd;\"><strong>B\u1ea3o v\u1ec7 ch\u1ed1ng r\u00f2 r\u1ec9 \u0111\u1ea5t<\/strong><\/td>\n<td style=\"padding: 10px; border: 1px solid #ddd;\">30mA<\/td>\n<td style=\"padding: 10px; border: 1px solid #ddd;\">30mA<\/td>\n<td style=\"padding: 10px; border: 1px solid #ddd;\">\u274c M\u1ee9c b\u1ea3o v\u1ec7 gi\u1ed1ng h\u1ec7t nhau<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>V\u1eady n\u1ebfu I\u0394n v\u1eabn \u1edf m\u1ee9c 30mA, t\u1ea1i sao vi\u1ec7c \u0111\u1ed5i \u0111\u00f4i khi l\u1ea1i ng\u0103n ch\u1eb7n \u0111\u01b0\u1ee3c vi\u1ec7c nh\u1ea3y do nhi\u1ec5u? L\u00fd thuy\u1ebft l\u00e0 \u0111\u00fang\u2014nh\u01b0ng ch\u01b0a \u0111\u1ea7y \u0111\u1ee7. RCD th\u1ef1c t\u1ebf kh\u00f4ng ho\u1ea1t \u0111\u1ed9ng trong \u0111i\u1ec1u ki\u1ec7n s\u00e1ch gi\u00e1o khoa.<\/p>\n<h2>T\u1ea1i sao vi\u1ec7c \u0111\u1ed5i sang 63A \u0111\u00f4i khi hi\u1ec7u qu\u1ea3: Vai tr\u00f2 \u1ea9n c\u1ee7a nhi\u1ec7t v\u00e0 h\u00ecnh h\u1ecdc l\u1eafp \u0111\u1eb7t<\/h2>\n<p>C\u00e1c th\u1ee3 \u0111i\u1ec7n ngo\u00e0i hi\u1ec7n tr\u01b0\u1eddng n\u00f3i \u0111\u00fang\u2014vi\u1ec7c \u0111\u1ed5i c\u00f3 hi\u1ec7u qu\u1ea3, nh\u01b0ng kh\u00f4ng ph\u1ea3i v\u00ec l\u00fd do m\u00e0 h\u1ea7u h\u1ebft m\u1ecdi ng\u01b0\u1eddi cho l\u00e0 nh\u01b0 v\u1eady. C\u01a1 ch\u1ebf th\u1ef1c s\u1ef1 li\u00ean quan \u0111\u1ebfn s\u1ef1 \u1ed5n \u0111\u1ecbnh nhi\u1ec7t v\u00e0 \u0111\u1ed9 nh\u1ea1y do l\u1eafp \u0111\u1eb7t g\u00e2y ra m\u00e0 l\u00fd thuy\u1ebft s\u00e1ch gi\u00e1o khoa b\u1ecf qua.<\/p>\n<h3>Bi\u1ebfn \u00e1p h\u00ecnh xuy\u1ebfn v\u00e0 c\u00e1c \u0111i\u1ec3m y\u1ebfu c\u1ee7a n\u00f3<\/h3>\n<p>B\u00ean trong m\u1ed7i RCD l\u00e0 m\u1ed9t bi\u1ebfn \u00e1p d\u00f2ng h\u00ecnh xuy\u1ebfn gi\u00e1m s\u00e1t c\u00e1c d\u00e2y d\u1eabn pha v\u00e0 trung t\u00ednh. Trong \u0111i\u1ec1u ki\u1ec7n ho\u00e0n h\u1ea3o, d\u00f2ng \u0111i\u1ec7n \u0111i ra b\u1eb1ng d\u00f2ng \u0111i\u1ec7n tr\u1edf l\u1ea1i, t\u1ea1o ra c\u00e1c t\u1eeb tr\u01b0\u1eddng \u0111\u1ed1i ngh\u1ecbch tri\u1ec7t ti\u00eau l\u1eabn nhau. B\u1ea5t k\u1ef3 s\u1ef1 m\u1ea5t c\u00e2n b\u1eb1ng n\u00e0o\u2014r\u00f2 r\u1ec9 xu\u1ed1ng \u0111\u1ea5t\u2014s\u1ebd k\u00edch ho\u1ea1t c\u01a1 ch\u1ebf t\u00e1c \u0111\u1ed9ng.<\/p>\n<p>Nh\u01b0ng \u0111i\u1ec1u ki\u1ec7n ho\u00e0n h\u1ea3o hi\u1ebfm khi t\u1ed3n t\u1ea1i. Hai y\u1ebfu t\u1ed1 g\u00e2y ra \u0111\u1ed9 nh\u1ea1y kh\u00f4ng mong mu\u1ed1n:<\/p>\n<p><strong>1. \u1ea2nh h\u01b0\u1edfng c\u1ee7a d\u00f2ng \u0111i\u1ec7n t\u1ea3i cao:<\/strong> Khi RCD 40A ho\u1ea1t \u0111\u1ed9ng g\u1ea7n c\u00f4ng su\u1ea5t (38A li\u00ean t\u1ee5c), nhi\u1ec7t \u0111\u00e1ng k\u1ec3 \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn l\u00f5i t\u1eeb c\u1ee7a bi\u1ebfn \u00e1p h\u00ecnh xuy\u1ebfn v\u00e0 s\u1ef1 \u1ed5n \u0111\u1ecbnh c\u1ee7a c\u01a1 ch\u1ebf t\u00e1c \u0111\u1ed9ng. D\u00f2ng \u0111i\u1ec7n cao c\u00f3 th\u1ec3 t\u1ea1o ra s\u1ef1 m\u1ea5t c\u00e2n b\u1eb1ng t\u1eeb tr\u01b0\u1eddng n\u1ebfu d\u00e2y d\u1eabn kh\u00f4ng \u0111\u01b0\u1ee3c \u0111\u1eb7t ho\u00e0n to\u00e0n \u1edf gi\u1eefa ho\u1eb7c n\u1ebfu kim lo\u1ea1i \u0111en g\u1ea7n \u0111\u00f3 l\u00e0m bi\u1ebfn d\u1ea1ng h\u00ecnh h\u1ecdc.<\/p>\n<p><strong>2. H\u00ecnh h\u1ecdc l\u1eafp \u0111\u1eb7t:<\/strong> D\u00e2y d\u1eabn kh\u00f4ng \u0111\u01b0\u1ee3c \u0111\u1eb7t \u1edf gi\u1eefa bi\u1ebfn \u00e1p h\u00ecnh xuy\u1ebfn, v\u1ecf kim lo\u1ea1i \u0111en g\u1ea7n \u0111\u00f3 ho\u1eb7c s\u1ef1 b\u1ea5t \u0111\u1ed1i x\u1ee9ng trong c\u00e1ch \u0111i d\u00e2y c\u00f3 th\u1ec3 g\u00e2y ra s\u1ef1 m\u1ea5t c\u00e2n b\u1eb1ng \u1ea3o. Nh\u1eefng \u1ea3nh h\u01b0\u1edfng n\u00e0y tr\u1edf n\u00ean t\u1ed3i t\u1ec7 h\u01a1n khi t\u1ea3i cao.<\/p>\n<h3>T\u1ea1i sao khung l\u1edbn h\u01a1n l\u00e0m gi\u1ea3m \u0111\u1ed9 nh\u1ea1y<\/h3>\n<p>N\u00e2ng c\u1ea5p l\u00ean 63A cung c\u1ea5p:<\/p>\n<ul>\n<li><strong>M\u1ea1ch t\u1eeb l\u1edbn h\u01a1n:<\/strong> L\u00f5i h\u00ecnh xuy\u1ebfn l\u1edbn h\u01a1n \u00edt nh\u1ea1y c\u1ea3m h\u01a1n v\u1edbi c\u00e1c khuy\u1ebft \u0111i\u1ec3m l\u1eafp \u0111\u1eb7t v\u00e0 l\u1ed7i \u0111\u1ecbnh v\u1ecb d\u00e2y d\u1eabn.<\/li>\n<li><strong>T\u1ed5n th\u1ea5t b\u00ean trong th\u1ea5p h\u01a1n:<\/strong> Thanh d\u1eabn n\u1eb7ng h\u01a1n v\u00e0 ti\u1ebfp \u0111i\u1ec3m l\u1edbn h\u01a1n c\u00f3 ngh\u0129a l\u00e0 \u0111i\u1ec7n tr\u1edf th\u1ea5p h\u01a1n. \u1ede c\u00f9ng m\u1ee9c t\u1ea3i 38A, thi\u1ebft b\u1ecb 63A ch\u1ea1y m\u00e1t h\u01a1n\u2014gi\u1ea3m tr\u00f4i nhi\u1ec7t.<\/li>\n<li><strong>Bi\u00ean nhi\u1ec7t t\u1ed1t h\u01a1n:<\/strong> Thi\u1ebft b\u1ecb 63A \u1edf 38A ho\u1ea1t \u0111\u1ed9ng \u1edf 60% c\u00f4ng su\u1ea5t v\u1edbi nhi\u1ec7t \u0111\u1ed9 \u1ed5n \u0111\u1ecbnh. Thi\u1ebft b\u1ecb 40A \u1edf 38A (95% c\u00f4ng su\u1ea5t) b\u1ecb qu\u00e1 t\u1ea3i nhi\u1ec7t.<\/li>\n<\/ul>\n<figure style=\"margin: 20px 0; text-align: center;\"><img decoding=\"async\" style=\"max-width: 100%; height: auto;\" src=\"https:\/\/img.viox.com\/viox-technical-diagram-comparing-40a-vs-63a-rcd-thermal-performance-under-identical-38a-load-showing-temperature-differences-internal-component-cutaway-views-and-thermal-stability-zones-with-color-coded-heat-mapping.webp\" alt=\"VIOX technical diagram comparing 40A vs 63A RCD thermal performance under identical 38A load showing temperature differences, internal component cutaway views, and thermal stability zones with color-coded heat mapping\" \/><figcaption style=\"font-style: italic; font-size: 0.9em; color: #666; margin-top: 8px;\">S\u01a1 \u0111\u1ed3 k\u1ef9 thu\u1eadt VIOX so s\u00e1nh hi\u1ec7u su\u1ea5t nhi\u1ec7t c\u1ee7a RCD 40A so v\u1edbi 63A d\u01b0\u1edbi c\u00f9ng m\u1ed9t t\u1ea3i 38A, cho th\u1ea5y s\u1ef1 kh\u00e1c bi\u1ec7t v\u1ec1 nhi\u1ec7t \u0111\u1ed9, h\u00ecnh \u1ea3nh c\u1eaft ngang c\u00e1c th\u00e0nh ph\u1ea7n b\u00ean trong v\u00e0 c\u00e1c v\u00f9ng \u1ed5n \u0111\u1ecbnh nhi\u1ec7t v\u1edbi b\u1ea3n \u0111\u1ed3 nhi\u1ec7t \u0111\u01b0\u1ee3c m\u00e3 h\u00f3a m\u00e0u<\/figcaption><\/figure>\n<h2>Th\u1ee7 ph\u1ea1m th\u1ef1c s\u1ef1: R\u00f2 r\u1ec9 n\u1ec1n t\u00edch l\u0169y<\/h2>\n<p>M\u1eb7c d\u00f9 c\u00e1c hi\u1ec7u \u1ee9ng nhi\u1ec7t gi\u1ea3i th\u00edch t\u1ea1i sao vi\u1ec7c \u0111\u1ed5i sang 63A \u0111\u00f4i khi h\u1eefu \u00edch, nh\u01b0ng ch\u00fang kh\u00f4ng ph\u1ea3i l\u00e0 nguy\u00ean nh\u00e2n g\u1ed1c r\u1ec5 c\u1ee7a h\u1ea7u h\u1ebft c\u00e1c tr\u01b0\u1eddng h\u1ee3p nh\u1ea3y do nhi\u1ec5u. V\u1ea5n \u0111\u1ec1 th\u1ef1c s\u1ef1 l\u00e0 r\u00f2 r\u1ec9 n\u1ec1n t\u00edch l\u0169y\u2014v\u00e0 vi\u1ec7c n\u00e2ng c\u1ea5p ampe kh\u00f4ng gi\u1ea3i quy\u1ebft \u0111\u01b0\u1ee3c v\u1ea5n \u0111\u1ec1 n\u00e0y.<\/p>\n<h3>Th\u00e1ch th\u1ee9c t\u1ea3i \u0111i\u1ec7n t\u1eed hi\u1ec7n \u0111\u1ea1i<\/h3>\n<p>C\u00e1c c\u00e0i \u0111\u1eb7t hi\u1ec7n \u0111\u1ea1i ch\u1ee9a \u0111\u1ea7y b\u1ed9 ngu\u1ed3n chuy\u1ec3n m\u1ea1ch: m\u00e1y t\u00ednh, \u0111\u00e8n LED, bi\u1ebfn t\u1ea7n, thi\u1ebft b\u1ecb th\u00f4ng minh. M\u1ed7i thi\u1ebft b\u1ecb ch\u1ee9a c\u00e1c t\u1ee5 l\u1ecdc EMI r\u00f2 r\u1ec9 d\u00f2ng \u0111i\u1ec7n nh\u1ecf xu\u1ed1ng \u0111\u1ea5t trong qu\u00e1 tr\u00ecnh ho\u1ea1t \u0111\u1ed9ng b\u00ecnh th\u01b0\u1eddng.<\/p>\n<p>R\u00f2 r\u1ec9 \u0111i\u1ec3n h\u00ecnh: M\u00e1y t\u00ednh \u0111\u1ec3 b\u00e0n (1-1,5mA), tr\u00ecnh \u0111i\u1ec1u khi\u1ec3n LED (0,5-1mA), VFD (2-3,5mA), b\u1ed9 s\u1ea1c m\u00e1y t\u00ednh x\u00e1ch tay (0,5mA).<\/p>\n<p>\u0110\u00e2y kh\u00f4ng ph\u1ea3i l\u00e0 l\u1ed7i\u2014ch\u00fang l\u00e0 r\u00f2 r\u1ec9 tu\u00e2n th\u1ee7 \u0111\u01b0\u1ee3c cho ph\u00e9p theo ti\u00eau chu\u1ea9n an to\u00e0n. Nh\u01b0ng tr\u00ean m\u1ed9t RCD duy nh\u1ea5t b\u1ea3o v\u1ec7 nhi\u1ec1u m\u1ea1ch, ch\u00fang t\u00edch l\u0169y.<\/p>\n<h3>S\u1ed1 h\u1ecdc c\u1ee7a th\u1ea3m h\u1ecda<\/h3>\n<p>Xem x\u00e9t m\u1ed9t v\u0103n ph\u00f2ng nh\u1ecf \u0111i\u1ec3n h\u00ecnh \u0111\u01b0\u1ee3c b\u1ea3o v\u1ec7 b\u1edfi m\u1ed9t RCD 40A duy nh\u1ea5t bao g\u1ed3m ba m\u1ea1ch:<\/p>\n<ul>\n<li>M\u1ea1ch 1 (Chi\u1ebfu s\u00e1ng): 15 \u0111\u00e8n LED \u00d7 0,75mA = 11,25mA<\/li>\n<li>M\u1ea1ch 2 (M\u00e1y tr\u1ea1m): 8 m\u00e1y t\u00ednh \u00d7 1,25mA = 10mA<\/li>\n<li>M\u1ea1ch 3 (HVAC): 1 b\u1ed9 VFD \u00d7 3mA = 3mA<\/li>\n<\/ul>\n<p><strong>T\u1ed5ng r\u00f2 r\u1ec9 th\u01b0\u1eddng tr\u1ef1c: 24,25mA<\/strong><\/p>\n<p>B\u00e2y gi\u1edd \u0111\u00e2y l\u00e0 ph\u1ea7n quan tr\u1ecdng: IEC 61008 cho ph\u00e9p RCD t\u00e1c \u0111\u1ed9ng \u1edf b\u1ea5t k\u1ef3 \u0111\u00e2u trong kho\u1ea3ng 50% v\u00e0 100% c\u1ee7a I\u0394n. \u0110\u1ed1i v\u1edbi thi\u1ebft b\u1ecb 30mA, \u0111i\u1ec1u \u0111\u00f3 c\u00f3 ngh\u0129a l\u00e0 ng\u01b0\u1ee1ng t\u00e1c \u0111\u1ed9ng c\u00f3 th\u1ec3 th\u1ea5p t\u1edbi 15mA ho\u1eb7c cao t\u1edbi 30mA t\u00f9y thu\u1ed9c v\u00e0o thi\u1ebft b\u1ecb c\u1ee5 th\u1ec3 v\u00e0 \u0111i\u1ec1u ki\u1ec7n ho\u1ea1t \u0111\u1ed9ng.<\/p>\n<p>C\u00e0i \u0111\u1eb7t c\u1ee7a b\u1ea1n \u0111\u00e3 \u1edf m\u1ee9c 24,25mA. B\u1ea5t k\u1ef3 qu\u00e1 tr\u00ecnh chuy\u1ec3n \u0111\u1ed5i n\u00e0o\u2014b\u1ed9 ngu\u1ed3n m\u00e1y t\u00ednh b\u1eadt, d\u00f2ng \u0111i\u1ec7n kh\u1edfi \u0111\u1ed9ng t\u1eeb \u0111\u1ed9ng c\u01a1, s\u1ef1 t\u0103ng \u0111i\u1ec7n \u00e1p nh\u1ecf\u2014c\u00f3 th\u1ec3 \u0111\u1ea9y r\u00f2 r\u1ec9 t\u1ee9c th\u1eddi l\u00ean tr\u00ean 30mA v\u00e0 g\u00e2y ra t\u00e1c \u0111\u1ed9ng. RCD \u0111ang l\u00e0m ch\u00ednh x\u00e1c nh\u1eefng g\u00ec n\u00f3 \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf \u0111\u1ec3 l\u00e0m. Kh\u00f4ng c\u00f3 l\u1ed7i. Ki\u1ebfn tr\u00fac \u0111\u01a1n gi\u1ea3n l\u00e0 qu\u00e1 t\u1ea3i.<\/p>\n<p><strong>B\u1ea3ng 2: V\u00ed d\u1ee5 v\u1ec1 t\u00edch l\u0169y r\u00f2 r\u1ec9 n\u1ec1n<\/strong><\/p>\n<table style=\"width: 100%; border-collapse: collapse; margin: 20px 0;\" border=\"1\">\n<thead>\n<tr style=\"background-color: #f9f9f9;\">\n<th style=\"padding: 10px; border: 1px solid #ddd;\">M\u1ea1ch \u0111i\u1ec7n<\/th>\n<th style=\"padding: 10px; border: 1px solid #ddd;\">Lo\u1ea1i T\u1ea3i<\/th>\n<th style=\"padding: 10px; border: 1px solid #ddd;\">S\u1ed1 l\u01b0\u1ee3ng<\/th>\n<th style=\"padding: 10px; border: 1px solid #ddd;\">R\u00f2 r\u1ec9 tr\u00ean m\u1ed7i thi\u1ebft b\u1ecb<\/th>\n<th style=\"padding: 10px; border: 1px solid #ddd;\">T\u1ed5ng r\u00f2 r\u1ec9 m\u1ea1ch<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td style=\"padding: 10px; border: 1px solid #ddd;\">Chi\u1ebfu s\u00e1ng<\/td>\n<td style=\"padding: 10px; border: 1px solid #ddd;\">\u0110\u00e8n LED<\/td>\n<td style=\"padding: 10px; border: 1px solid #ddd;\">15<\/td>\n<td style=\"padding: 10px; border: 1px solid #ddd;\">0.75mA<\/td>\n<td style=\"padding: 10px; border: 1px solid #ddd;\">11.25mA<\/td>\n<\/tr>\n<tr>\n<td style=\"padding: 10px; border: 1px solid #ddd;\">Tr\u1ea1m l\u00e0m vi\u1ec7c<\/td>\n<td style=\"padding: 10px; border: 1px solid #ddd;\">M\u00e1y t\u00ednh \u0111\u1ec3 b\u00e0n<\/td>\n<td style=\"padding: 10px; border: 1px solid #ddd;\">8<\/td>\n<td style=\"padding: 10px; border: 1px solid #ddd;\">1.25mA<\/td>\n<td style=\"padding: 10px; border: 1px solid #ddd;\">10.0mA<\/td>\n<\/tr>\n<tr>\n<td style=\"padding: 10px; border: 1px solid #ddd;\">HVAC (H\u1ec7 th\u1ed1ng s\u01b0\u1edfi \u1ea5m, th\u00f4ng gi\u00f3 v\u00e0 \u0111i\u1ec1u h\u00f2a kh\u00f4ng kh\u00ed)<\/td>\n<td style=\"padding: 10px; border: 1px solid #ddd;\">B\u1ed9 \u0111i\u1ec1u khi\u1ec3n VFD (Bi\u1ebfn t\u1ea7n s\u1ed1)<\/td>\n<td style=\"padding: 10px; border: 1px solid #ddd;\">1<\/td>\n<td style=\"padding: 10px; border: 1px solid #ddd;\">3.0mA<\/td>\n<td style=\"padding: 10px; border: 1px solid #ddd;\">3.0mA<\/td>\n<\/tr>\n<tr>\n<td style=\"padding: 10px; border: 1px solid #ddd;\"><strong>T\u1ed5ng tr\u00ean m\u1ed9t RCD \u0111\u01a1n<\/strong><\/td>\n<td style=\"padding: 10px; border: 1px solid #ddd;\">\u2014<\/td>\n<td style=\"padding: 10px; border: 1px solid #ddd;\">\u2014<\/td>\n<td style=\"padding: 10px; border: 1px solid #ddd;\">\u2014<\/td>\n<td style=\"padding: 10px; border: 1px solid #ddd;\"><strong>24.25mA<\/strong><\/td>\n<\/tr>\n<tr>\n<td style=\"padding: 10px; border: 1px solid #ddd;\"><strong>Ng\u01b0\u1ee1ng t\u00e1c \u0111\u1ed9ng c\u1ee7a RCD 30mA<\/strong><\/td>\n<td style=\"padding: 10px; border: 1px solid #ddd;\">\u2014<\/td>\n<td style=\"padding: 10px; border: 1px solid #ddd;\">\u2014<\/td>\n<td style=\"padding: 10px; border: 1px solid #ddd;\">\u2014<\/td>\n<td style=\"padding: 10px; border: 1px solid #ddd;\"><strong>15-30mA<\/strong><\/td>\n<\/tr>\n<tr>\n<td style=\"padding: 10px; border: 1px solid #ddd;\"><strong>M\u1ee9c \u0111\u1ed9 r\u1ee7i ro<\/strong><\/td>\n<td style=\"padding: 10px; border: 1px solid #ddd;\">\u2014<\/td>\n<td style=\"padding: 10px; border: 1px solid #ddd;\">\u2014<\/td>\n<td style=\"padding: 10px; border: 1px solid #ddd;\">\u2014<\/td>\n<td style=\"padding: 10px; border: 1px solid #ddd;\"><strong>CAO \u2013 \u0110\u00e3 l\u00e0 81% c\u1ee7a I\u0394n<\/strong><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h3>H\u01b0\u1edbng d\u1eabn c\u1ee7a ng\u00e0nh: Quy t\u1eafc 30%<\/h3>\n<p>C\u00e1c nh\u00e0 s\u1ea3n xu\u1ea5t v\u00e0 t\u1ed5 ch\u1ee9c ti\u00eau chu\u1ea9n khuy\u1ebfn ngh\u1ecb gi\u1eef d\u00f2ng r\u00f2 \u1edf m\u1ee9c d\u01b0\u1edbi 30% c\u1ee7a I\u0394n \u0111\u1ec3 tr\u00e1nh ng\u1eaft m\u1ea1ch do nhi\u1ec5u. \u0110\u1ed1i v\u1edbi RCD 30mA, \u0111i\u1ec1u \u0111\u00f3 c\u00f3 ngh\u0129a l\u00e0 gi\u1edbi h\u1ea1n d\u00f2ng r\u00f2 n\u1ec1n \u1edf m\u1ee9c x\u1ea5p x\u1ec9 9mA tr\u00ean m\u1ed7i thi\u1ebft b\u1ecb. V\u00ed d\u1ee5 tr\u00ean v\u01b0\u1ee3t qu\u00e1 h\u01b0\u1edbng d\u1eabn n\u00e0y g\u1ea7n 3 l\u1ea7n.<\/p>\n<p>Vi\u1ec7c thay th\u1ebf b\u1eb1ng RCD 63A kh\u00f4ng thay \u0111\u1ed5i ph\u00e9p t\u00ednh. D\u00f2ng r\u00f2 v\u1eabn l\u00e0 24.25mA v\u00e0 ng\u01b0\u1ee1ng t\u00e1c \u0111\u1ed9ng v\u1eabn l\u00e0 30mA. B\u1ea1n ch\u01b0a kh\u1eafc ph\u1ee5c \u0111\u01b0\u1ee3c g\u00ec c\u1ea3\u2014b\u1ea1n ch\u1ec9 may m\u1eafn n\u1ebfu vi\u1ec7c ng\u1eaft m\u1ea1ch d\u1eebng l\u1ea1i, c\u00f3 l\u1ebd v\u00ec thi\u1ebft b\u1ecb m\u1edbi c\u00f3 \u0111\u1eb7c t\u00ednh t\u00e1c \u0111\u1ed9ng g\u1ea7n v\u1edbi 30mA h\u01a1n l\u00e0 15mA.<\/p>\n<figure style=\"margin: 20px 0; text-align: center;\"><img decoding=\"async\" style=\"max-width: 100%; height: auto;\" src=\"https:\/\/img.viox.com\/viox-chart-illustrating-30ma-rcd-operating-window-with-color-coded-risk-zones-showing-background-leakage-accumulation-from-led-lighting-computers-and-vfd-equipment-reaching-critical-24-25ma-threshold.webp\" alt=\"VIOX chart illustrating 30mA RCD operating window with color-coded risk zones showing background leakage accumulation from LED lighting, computers, and VFD equipment reaching critical 24.25mA threshold\" \/><figcaption style=\"font-style: italic; font-size: 0.9em; color: #666; margin-top: 8px;\">Bi\u1ec3u \u0111\u1ed3 VIOX minh h\u1ecda c\u1eeda s\u1ed5 ho\u1ea1t \u0111\u1ed9ng c\u1ee7a RCD 30mA v\u1edbi c\u00e1c v\u00f9ng r\u1ee7i ro \u0111\u01b0\u1ee3c m\u00e3 h\u00f3a m\u00e0u cho th\u1ea5y s\u1ef1 t\u00edch l\u0169y d\u00f2ng r\u00f2 n\u1ec1n t\u1eeb \u0111\u00e8n LED, m\u00e1y t\u00ednh v\u00e0 thi\u1ebft b\u1ecb VFD \u0111\u1ea1t \u0111\u1ebfn ng\u01b0\u1ee1ng quan tr\u1ecdng 24.25mA<\/figcaption><\/figure>\n<h2>Gi\u1ea3i ph\u00e1p th\u00edch h\u1ee3p: B\u1ea3o v\u1ec7 ph\u00e2n t\u00e1n b\u1eb1ng RCBO<\/h2>\n<p>N\u1ebfu vi\u1ec7c n\u00e2ng c\u1ea5p ampe l\u00e0 \u0111i\u1ec1u tr\u1ecb tri\u1ec7u ch\u1ee9ng, th\u00ec \u0111\u00e2u l\u00e0 c\u00e1ch ch\u1eefa tr\u1ecb? C\u00e2u tr\u1ea3 l\u1eddi l\u00e0 ki\u1ebfn tr\u00fac: chuy\u1ec3n t\u1eeb b\u1ea3o v\u1ec7 RCD t\u1eadp trung sang b\u1ea3o v\u1ec7 RCBO (B\u1ed9 ng\u1eaft m\u1ea1ch d\u00f2ng d\u01b0 c\u00f3 b\u1ea3o v\u1ec7 qu\u00e1 d\u00f2ng) ph\u00e2n t\u00e1n.<\/p>\n<h3>Ki\u1ebfn tr\u00fac c\u0169: M\u1ed9t RCD, nhi\u1ec1u m\u1ea1ch<\/h3>\n<p>C\u00e1c b\u1ea3ng \u0111i\u1ec7n truy\u1ec1n th\u1ed1ng s\u1eed d\u1ee5ng m\u1ed9t RCD duy nh\u1ea5t \u1edf th\u01b0\u1ee3ng ngu\u1ed3n c\u1ee7a nhi\u1ec1u m\u1ea1ch <a href=\"https:\/\/test.viox.com\/vi\/mcb\/\">C\u00f4ng<\/a>. M\u1ed9t RCD 40A ho\u1eb7c 63A b\u1ea3o v\u1ec7 3-5 m\u1ea1ch. M\u00f4 h\u00ecnh \u201cb\u1ea3o v\u1ec7 chung\u201d n\u00e0y ho\u1ea1t \u0111\u1ed9ng khi t\u1ea3i l\u00e0 c\u00e1c b\u1ed9 gia nhi\u1ec7t \u0111i\u1ec7n tr\u1edf \u0111\u01a1n gi\u1ea3n v\u1edbi d\u00f2ng r\u00f2 kh\u00f4ng \u0111\u00e1ng k\u1ec3.<\/p>\n<p>Nh\u01b0ng c\u00e1c c\u00e0i \u0111\u1eb7t hi\u1ec7n \u0111\u1ea1i t\u1ea1o ra m\u1ed9t n\u00fat th\u1eaft c\u1ed5 chai. T\u1ea5t c\u1ea3 d\u00f2ng r\u00f2 n\u1ec1n \u0111\u1ec1u d\u1ed3n qua m\u1ed9t c\u1eeda s\u1ed5 30mA.<\/p>\n<h3>Ki\u1ebfn tr\u00fac m\u1edbi: M\u1ed9t RCBO cho m\u1ed7i m\u1ea1ch<\/h3>\n<p>RCBO k\u1ebft h\u1ee3p b\u1ea3o v\u1ec7 qu\u00e1 d\u00f2ng (ch\u1ee9c n\u0103ng MCB) v\u00e0 b\u1ea3o v\u1ec7 d\u00f2ng d\u01b0 (ch\u1ee9c n\u0103ng RCD) trong m\u1ed9t thi\u1ebft b\u1ecb duy nh\u1ea5t. Thay v\u00ec m\u1ed9t RCD d\u00f9ng chung, m\u1ed7i m\u1ea1ch c\u00f3 ng\u00e2n s\u00e1ch d\u00f2ng r\u00f2 30mA ri\u00eang.<\/p>\n<p>S\u1eed d\u1ee5ng v\u00ed d\u1ee5 v\u0103n ph\u00f2ng tr\u01b0\u1edbc \u0111\u00f3:<\/p>\n<ul>\n<li>1 RCD (30mA) b\u1ea3o v\u1ec7 3 m\u1ea1ch<\/li>\n<li>T\u1ed5ng d\u00f2ng r\u00f2: 24.25mA<\/li>\n<li>M\u1ee9c s\u1eed d\u1ee5ng: 81% c\u00f4ng su\u1ea5t<\/li>\n<li>K\u1ebft qu\u1ea3: Ng\u1eaft m\u1ea1ch do nhi\u1ec5u th\u01b0\u1eddng xuy\u00ean<\/li>\n<\/ul>\n<p><strong>Thi\u1ebft k\u1ebf m\u1edbi:<\/strong><\/p>\n<ul>\n<li>3 RCBO (m\u1ed7i c\u00e1i 30mA)<\/li>\n<li>D\u00f2ng r\u00f2 m\u1ea1ch 1: 11.25mA (38% c\u00f4ng su\u1ea5t)<\/li>\n<li>D\u00f2ng r\u00f2 m\u1ea1ch 2: 10mA (33% c\u00f4ng su\u1ea5t)<\/li>\n<li>D\u00f2ng r\u00f2 m\u1ea1ch 3: 3mA (10% c\u00f4ng su\u1ea5t)<\/li>\n<li>K\u1ebft qu\u1ea3: M\u1ed7i m\u1ea1ch ho\u1ea1t \u0111\u1ed9ng t\u1ed1t trong gi\u1edbi h\u1ea1n an to\u00e0n<\/li>\n<\/ul>\n<figure style=\"margin: 20px 0; text-align: center;\"><img decoding=\"async\" style=\"max-width: 100%; height: auto;\" src=\"https:\/\/img.viox.com\/viox-electrical-schematic-comparing-shared-rcd-architecture-with-accumulated-24-25ma-leakage-versus-distributed-rcbo-architecture-with-isolated-per-circuit-leakage-protection-showing-upgrade-path.webp\" alt=\"VIOX electrical schematic comparing shared RCD architecture with accumulated 24.25mA leakage versus distributed RCBO architecture with isolated per-circuit leakage protection showing upgrade path\" \/><figcaption style=\"font-style: italic; font-size: 0.9em; color: #666; margin-top: 8px;\">S\u01a1 \u0111\u1ed3 \u0111i\u1ec7n VIOX so s\u00e1nh ki\u1ebfn tr\u00fac RCD d\u00f9ng chung v\u1edbi d\u00f2ng r\u00f2 t\u00edch l\u0169y 24.25mA so v\u1edbi ki\u1ebfn tr\u00fac RCBO ph\u00e2n t\u00e1n v\u1edbi b\u1ea3o v\u1ec7 d\u00f2ng r\u00f2 ri\u00eang bi\u1ec7t cho m\u1ed7i m\u1ea1ch, cho th\u1ea5y \u0111\u01b0\u1eddng d\u1eabn n\u00e2ng c\u1ea5p<\/figcaption><\/figure>\n<h3>L\u1ee3i \u00edch b\u1ed5 sung<\/h3>\n<p><strong>\u0110\u1ecbnh v\u1ecb l\u1ed7i:<\/strong> Ch\u1ec9 m\u1ea1ch b\u1ecb \u1ea3nh h\u01b0\u1edfng b\u1ecb ng\u1eaft k\u1ebft n\u1ed1i, kh\u00f4ng ph\u1ea3i to\u00e0n b\u1ed9 ph\u00f2ng. Th\u1eddi gian ng\u1eebng ho\u1ea1t \u0111\u1ed9ng gi\u1ea3m \u0111\u00e1ng k\u1ec3.<\/p>\n<p><strong>Kh\u1eafc ph\u1ee5c s\u1ef1 c\u1ed1 nhanh h\u01a1n:<\/strong> B\u1ea1n ngay l\u1eadp t\u1ee9c bi\u1ebft m\u1ea1ch n\u00e0o c\u00f3 v\u1ea5n \u0111\u1ec1.<\/p>\n<p><strong>Kh\u1ea3 n\u0103ng m\u1edf r\u1ed9ng:<\/strong> M\u1ed7i RCBO m\u1edbi mang \u0111\u1ebfn ng\u00e2n s\u00e1ch 30mA ri\u00eang.<\/p>\n<p><strong>S\u1ef1 tu\u00e2n th\u1ee7:<\/strong> Nhi\u1ec1u khu v\u1ef1c hi\u1ec7n y\u00eau c\u1ea7u b\u1ea3o v\u1ec7 RCBO cho c\u00e1c m\u1ea1ch c\u1ee5 th\u1ec3.<\/p>\n<p><strong>B\u1ea3ng 3: So s\u00e1nh ki\u1ebfn tr\u00fac RCD d\u00f9ng chung v\u00e0 RCBO ph\u00e2n t\u00e1n<\/strong><\/p>\n<table style=\"width: 100%; border-collapse: collapse; margin: 20px 0;\" border=\"1\">\n<thead>\n<tr style=\"background-color: #f9f9f9;\">\n<th style=\"padding: 10px; border: 1px solid #ddd;\">\u0110\u1eb7c tr\u01b0ng<\/th>\n<th style=\"padding: 10px; border: 1px solid #ddd;\">RCD d\u00f9ng chung + MCB<\/th>\n<th style=\"padding: 10px; border: 1px solid #ddd;\">RCBO ph\u00e2n t\u00e1n<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td style=\"padding: 10px; border: 1px solid #ddd;\"><strong>Ng\u00e2n s\u00e1ch d\u00f2ng r\u00f2<\/strong><\/td>\n<td style=\"padding: 10px; border: 1px solid #ddd;\">T\u1ea5t c\u1ea3 c\u00e1c m\u1ea1ch d\u00f9ng chung 30mA<\/td>\n<td style=\"padding: 10px; border: 1px solid #ddd;\">M\u1ed7i m\u1ea1ch c\u00f3 30mA<\/td>\n<\/tr>\n<tr>\n<td style=\"padding: 10px; border: 1px solid #ddd;\"><strong>R\u1ee7i ro ng\u1eaft m\u1ea1ch do nhi\u1ec5u<\/strong><\/td>\n<td style=\"padding: 10px; border: 1px solid #ddd;\">Cao (d\u00f2ng r\u00f2 t\u00edch l\u0169y)<\/td>\n<td style=\"padding: 10px; border: 1px solid #ddd;\">Th\u1ea5p (d\u00f2ng r\u00f2 ri\u00eang bi\u1ec7t)<\/td>\n<\/tr>\n<tr>\n<td style=\"padding: 10px; border: 1px solid #ddd;\"><strong>T\u00e1c \u0111\u1ed9ng c\u1ee7a l\u1ed7i<\/strong><\/td>\n<td style=\"padding: 10px; border: 1px solid #ddd;\">T\u1ea5t c\u1ea3 c\u00e1c m\u1ea1ch \u0111\u01b0\u1ee3c b\u1ea3o v\u1ec7 \u0111\u1ec1u b\u1ecb ng\u1eaft<\/td>\n<td style=\"padding: 10px; border: 1px solid #ddd;\">Ch\u1ec9 m\u1ea1ch b\u1ecb l\u1ed7i b\u1ecb ng\u1eaft<\/td>\n<\/tr>\n<tr>\n<td style=\"padding: 10px; border: 1px solid #ddd;\"><strong>Th\u1eddi gian kh\u1eafc ph\u1ee5c s\u1ef1 c\u1ed1<\/strong><\/td>\n<td style=\"padding: 10px; border: 1px solid #ddd;\">D\u00e0i (ki\u1ec3m tra t\u1eebng m\u1ea1ch)<\/td>\n<td style=\"padding: 10px; border: 1px solid #ddd;\">Ng\u1eafn (l\u1ed7i \u0111\u01b0\u1ee3c \u0111\u1ecbnh v\u1ecb)<\/td>\n<\/tr>\n<tr>\n<td style=\"padding: 10px; border: 1px solid #ddd;\"><strong>Chi ph\u00ed l\u1eafp \u0111\u1eb7t<\/strong><\/td>\n<td style=\"padding: 10px; border: 1px solid #ddd;\">Chi ph\u00ed ban \u0111\u1ea7u th\u1ea5p h\u01a1n<\/td>\n<td style=\"padding: 10px; border: 1px solid #ddd;\">Chi ph\u00ed ban \u0111\u1ea7u cao h\u01a1n<\/td>\n<\/tr>\n<tr>\n<td style=\"padding: 10px; border: 1px solid #ddd;\"><strong>Chi ph\u00ed v\u1eadn h\u00e0nh<\/strong><\/td>\n<td style=\"padding: 10px; border: 1px solid #ddd;\">Cao h\u01a1n (g\u1ecdi d\u1ecbch v\u1ee5 th\u01b0\u1eddng xuy\u00ean)<\/td>\n<td style=\"padding: 10px; border: 1px solid #ddd;\">Th\u1ea5p h\u01a1n (\u00edt ng\u1eaft m\u1ea1ch do nhi\u1ec5u h\u01a1n)<\/td>\n<\/tr>\n<tr>\n<td style=\"padding: 10px; border: 1px solid #ddd;\"><strong>Tu\u00e2n th\u1ee7 Quy t\u1eafc 30%<\/strong><\/td>\n<td style=\"padding: 10px; border: 1px solid #ddd;\">Kh\u00f3 kh\u0103n v\u1edbi &gt;3 m\u1ea1ch<\/td>\n<td style=\"padding: 10px; border: 1px solid #ddd;\">D\u1ec5 d\u00e0ng cho m\u1ecdi s\u1ed1 l\u01b0\u1ee3ng m\u1ea1ch<\/td>\n<\/tr>\n<tr>\n<td style=\"padding: 10px; border: 1px solid #ddd;\"><strong>M\u1edf r\u1ed9ng trong t\u01b0\u01a1ng lai<\/strong><\/td>\n<td style=\"padding: 10px; border: 1px solid #ddd;\">L\u00e0m tr\u1ea7m tr\u1ecdng th\u00eam v\u1ea5n \u0111\u1ec1 r\u00f2 r\u1ec9<\/td>\n<td style=\"padding: 10px; border: 1px solid #ddd;\">Kh\u00f4ng \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn c\u00e1c m\u1ea1ch hi\u1ec7n c\u00f3<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h2>Ph\u01b0\u01a1ng ph\u00e1p ch\u1ea9n \u0111o\u00e1n: H\u00e3y l\u00e0 ng\u01b0\u1eddi kh\u1eafc ph\u1ee5c s\u1ef1 c\u1ed1, kh\u00f4ng ph\u1ea3i l\u00e0 ng\u01b0\u1eddi thay th\u1ebf b\u1ed9 ph\u1eadn<\/h2>\n<p>Khi g\u1eb7p ph\u1ea3i t\u00ecnh tr\u1ea1ng RCD ng\u1eaft do nhi\u1ec5u, h\u00e3y tu\u00e2n theo quy tr\u00ecnh ch\u1ea9n \u0111o\u00e1n c\u00f3 h\u1ec7 th\u1ed1ng tr\u01b0\u1edbc khi t\u00ecm \u0111\u1ebfn d\u1ee5ng c\u1ee5 ho\u1eb7c \u0111\u1eb7t h\u00e0ng thi\u1ebft b\u1ecb thay th\u1ebf.<\/p>\n<h3>B\u01b0\u1edbc 1: \u0110o d\u00f2ng r\u00f2 \u0111\u1ea5t t\u0129nh<\/h3>\n<p>S\u1eed d\u1ee5ng ampe k\u00ecm \u0111o d\u00f2ng r\u00f2:<\/p>\n<ul>\n<li><strong>T\u1ea1i RCD:<\/strong> K\u1eb9p xung quanh d\u00e2y d\u1eabn \u0111\u1ea5t \u1edf ph\u00eda h\u1ea1 l\u01b0u. \u0110i\u1ec1u n\u00e0y \u0111o t\u1ed5ng d\u00f2ng r\u00f2 t\u1eeb t\u1ea5t c\u1ea3 c\u00e1c m\u1ea1ch \u0111\u01b0\u1ee3c b\u1ea3o v\u1ec7.<\/li>\n<li><strong>Cho m\u1ed7i m\u1ea1ch:<\/strong> K\u1eb9p xung quanh d\u00e2y pha v\u00e0 d\u00e2y trung t\u00ednh c\u00f9ng nhau cho m\u1ed7i nh\u00e1nh.<\/li>\n<\/ul>\n<ul>\n<li>&lt; 9mA: Ch\u1ea5p nh\u1eadn \u0111\u01b0\u1ee3c<\/li>\n<li>9-15mA: Theo d\u00f5i, l\u00ean k\u1ebf ho\u1ea1ch chia m\u1ea1ch<\/li>\n<li>15-25mA: Nguy c\u01a1 ng\u1eaft do nhi\u1ec5u cao<\/li>\n<li><strong>&gt; 25mA: C\u1ea7n thay \u0111\u1ed5i ki\u1ebfn tr\u00fac ngay l\u1eadp t\u1ee9c<\/strong><\/li>\n<\/ul>\n<h3>B\u01b0\u1edbc 2: X\u00e1c minh Lo\u1ea1i RCD<\/h3>\n<p>T\u1ea3i \u0111i\u1ec7n t\u1eed hi\u1ec7n \u0111\u1ea1i t\u1ea1o ra d\u00f2ng r\u00f2 DC xung m\u00e0 RCD Lo\u1ea1i AC kh\u00f4ng th\u1ec3 ph\u00e1t hi\u1ec7n \u0111\u00fang c\u00e1ch.<\/p>\n<p><strong>Lo\u1ea1i AC:<\/strong> C\u0169. Ch\u1ec9 ph\u00e1t hi\u1ec7n d\u00f2ng r\u00f2 AC h\u00ecnh sin thu\u1ea7n t\u00fay. <strong>L\u1ed7i th\u1eddi.<\/strong> B\u1ecb c\u1ea5m \u1edf \u00dac k\u1ec3 t\u1eeb n\u0103m 2023.<\/p>\n<p><strong>Lo\u1ea1i A:<\/strong> Ph\u00e1t hi\u1ec7n d\u00f2ng r\u00f2 AC v\u00e0 DC xung. Ti\u00eau chu\u1ea9n t\u1ed1i thi\u1ec3u cho c\u00e1c c\u00e0i \u0111\u1eb7t hi\u1ec7n \u0111\u1ea1i.<\/p>\n<p><strong>Lo\u1ea1i B\/F:<\/strong> B\u1eaft bu\u1ed9c \u0111\u1ed1i v\u1edbi d\u00f2ng r\u00f2 DC cao (b\u1ed9 s\u1ea1c EV, bi\u1ebfn t\u1ea7n n\u0103ng l\u01b0\u1ee3ng m\u1eb7t tr\u1eddi, VFD c\u00f4ng nghi\u1ec7p).<\/p>\n<p>N\u1ebfu RCD c\u1ee7a b\u1ea1n ghi \u201cLo\u1ea1i AC\u201d, th\u00ec vi\u1ec7c thay th\u1ebf b\u1eb1ng Lo\u1ea1i A l\u00e0 b\u1eaft bu\u1ed9c b\u1ea5t k\u1ec3 c\u01b0\u1eddng \u0111\u1ed9 d\u00f2ng \u0111i\u1ec7n.<\/p>\n<h3>B\u01b0\u1edbc 3: Ki\u1ec3m tra Ch\u1ea5t l\u01b0\u1ee3ng L\u1eafp \u0111\u1eb7t<\/h3>\n<ul>\n<li><strong>\u0110\u1ecbnh t\u00e2m d\u00e2y d\u1eabn:<\/strong> \u0110\u1ea3m b\u1ea3o d\u00e2y pha v\u00e0 d\u00e2y trung t\u00ednh \u0111i qua t\u00e2m c\u1ee7a l\u1ed7 h\u00ecnh xuy\u1ebfn, kh\u00f4ng b\u1ecb \u00e9p v\u00e0o m\u1ed9t b\u00ean.<\/li>\n<li><strong>Kho\u1ea3ng h\u1edf v\u1eadt li\u1ec7u t\u1eeb t\u00ednh:<\/strong> Gi\u1eef v\u1ecf th\u00e9p, ph\u1ee5 ki\u1ec7n \u1ed1ng d\u1eabn v\u00e0 ph\u1ea7n c\u1ee9ng l\u1eafp \u0111\u1eb7t c\u00e1ch xa xuy\u1ebfn RCD \u00edt nh\u1ea5t 50mm.<\/li>\n<li><strong>C\u00e2n b\u1eb1ng t\u1ea3i:<\/strong> X\u00e1c minh r\u1eb1ng RCD kh\u00f4ng ho\u1ea1t \u0111\u1ed9ng li\u00ean t\u1ee5c tr\u00ean 80% d\u00f2ng \u0111i\u1ec7n \u0111\u1ecbnh m\u1ee9c c\u1ee7a n\u00f3.<\/li>\n<\/ul>\n<h3>B\u01b0\u1edbc 4: L\u1eadp k\u1ebf ho\u1ea1ch Thay \u0111\u1ed5i Ki\u1ebfn tr\u00fac<\/h3>\n<p>D\u1ef1a tr\u00ean c\u00e1c ph\u00e9p \u0111o:<\/p>\n<ul>\n<li><strong>N\u1ebfu d\u00f2ng r\u00f2 &lt; 9mA:<\/strong> S\u1ef1 c\u1ed1 c\u00f3 th\u1ec3 li\u00ean quan \u0111\u1ebfn nhi\u1ec7t ho\u1eb7c l\u1eafp \u0111\u1eb7t. C\u00e2n nh\u1eafc n\u00e2ng c\u1ea5p 63A v\u1edbi c\u00e1c \u0111i\u1ec1u ch\u1ec9nh h\u00ecnh h\u1ecdc.<\/li>\n<li><strong>N\u1ebfu d\u00f2ng r\u00f2 9-25mA:<\/strong> C\u1ea7n chia m\u1ea1ch. Di chuy\u1ec3n c\u00e1c m\u1ea1ch c\u00f3 d\u00f2ng r\u00f2 cao (IT, VFD, LED) sang RCBO chuy\u00ean d\u1ee5ng.<\/li>\n<li><strong>N\u1ebfu d\u00f2ng r\u00f2 &gt; 25mA:<\/strong> Chuy\u1ec3n \u0111\u1ed5i ho\u00e0n to\u00e0n sang RCBO. Ki\u1ebfn tr\u00fac RCD d\u00f9ng chung kh\u00f4ng c\u00f2n kh\u1ea3 thi.<\/li>\n<\/ul>\n<p><strong>B\u1ea3ng 4: Ma tr\u1eadn Quy\u1ebft \u0111\u1ecbnh Kh\u1eafc ph\u1ee5c S\u1ef1 c\u1ed1<\/strong><\/p>\n<table style=\"width: 100%; border-collapse: collapse; margin: 20px 0;\" border=\"1\">\n<thead>\n<tr style=\"background-color: #f9f9f9;\">\n<th style=\"padding: 10px; border: 1px solid #ddd;\">\u0110o d\u00f2ng r\u00f2 t\u0129nh<\/th>\n<th style=\"padding: 10px; border: 1px solid #ddd;\">D\u00f2ng t\u1ea3i so v\u1edbi In<\/th>\n<th style=\"padding: 10px; border: 1px solid #ddd;\">Lo\u1ea1i RCD<\/th>\n<th style=\"padding: 10px; border: 1px solid #ddd;\">H\u00e0nh \u0111\u1ed9ng \u0111\u01b0\u1ee3c \u0111\u1ec1 xu\u1ea5t<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td style=\"padding: 10px; border: 1px solid #ddd;\">&lt; 9mA<\/td>\n<td style=\"padding: 10px; border: 1px solid #ddd;\">&lt; 70% \u0111\u1ecbnh m\u1ee9c<\/td>\n<td style=\"padding: 10px; border: 1px solid #ddd;\">Lo\u1ea1i A<\/td>\n<td style=\"padding: 10px; border: 1px solid #ddd;\">Ki\u1ec3m tra h\u00ecnh h\u1ecdc l\u1eafp \u0111\u1eb7t; theo d\u00f5i<\/td>\n<\/tr>\n<tr>\n<td style=\"padding: 10px; border: 1px solid #ddd;\">&lt; 9mA<\/td>\n<td style=\"padding: 10px; border: 1px solid #ddd;\">&gt; 80% \u0111\u1ecbnh m\u1ee9c<\/td>\n<td style=\"padding: 10px; border: 1px solid #ddd;\">Lo\u1ea1i A<\/td>\n<td style=\"padding: 10px; border: 1px solid #ddd;\">N\u00e2ng c\u1ea5p l\u00ean khung 63A \u0111\u1ec3 c\u00f3 bi\u00ean \u0111\u1ed9 nhi\u1ec7t<\/td>\n<\/tr>\n<tr>\n<td style=\"padding: 10px; border: 1px solid #ddd;\">&lt; 9mA<\/td>\n<td style=\"padding: 10px; border: 1px solid #ddd;\">B\u1ea5t K\u1ef3<\/td>\n<td style=\"padding: 10px; border: 1px solid #ddd;\">Lo\u1ea1i AC<\/td>\n<td style=\"padding: 10px; border: 1px solid #ddd;\"><strong>Thay th\u1ebf b\u1eb1ng Lo\u1ea1i A ngay l\u1eadp t\u1ee9c<\/strong><\/td>\n<\/tr>\n<tr>\n<td style=\"padding: 10px; border: 1px solid #ddd;\">9-15mA<\/td>\n<td style=\"padding: 10px; border: 1px solid #ddd;\">B\u1ea5t K\u1ef3<\/td>\n<td style=\"padding: 10px; border: 1px solid #ddd;\">Lo\u1ea1i A<\/td>\n<td style=\"padding: 10px; border: 1px solid #ddd;\">Chia m\u1ea1ch c\u00f3 d\u00f2ng r\u00f2 cao nh\u1ea5t sang RCBO<\/td>\n<\/tr>\n<tr>\n<td style=\"padding: 10px; border: 1px solid #ddd;\">15-25mA<\/td>\n<td style=\"padding: 10px; border: 1px solid #ddd;\">B\u1ea5t K\u1ef3<\/td>\n<td style=\"padding: 10px; border: 1px solid #ddd;\">Lo\u1ea1i A<\/td>\n<td style=\"padding: 10px; border: 1px solid #ddd;\">Di chuy\u1ec3n 2-3 m\u1ea1ch sang RCBO<\/td>\n<\/tr>\n<tr>\n<td style=\"padding: 10px; border: 1px solid #ddd;\">&gt; 25mA<\/td>\n<td style=\"padding: 10px; border: 1px solid #ddd;\">B\u1ea5t K\u1ef3<\/td>\n<td style=\"padding: 10px; border: 1px solid #ddd;\">B\u1ea5t K\u1ef3<\/td>\n<td style=\"padding: 10px; border: 1px solid #ddd;\"><strong>Y\u00eau c\u1ea7u chuy\u1ec3n \u0111\u1ed5i ho\u00e0n to\u00e0n sang RCBO<\/strong><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h2>Nh\u1eefng C\u00e2u H\u1ecfi Th\u01b0\u1eddng<\/h2>\n<p><strong>H: Vi\u1ec7c n\u00e2ng c\u1ea5p t\u1eeb RCD 40A l\u00ean 63A c\u00f3 ng\u0103n ch\u1eb7n \u0111\u01b0\u1ee3c t\u00ecnh tr\u1ea1ng ng\u1eaft do nhi\u1ec5u kh\u00f4ng?<\/strong><\/p>\n<p>\u0110: \u0110\u00f4i khi, nh\u01b0ng kh\u00f4ng ph\u1ea3i v\u00ec l\u00fd do m\u00e0 h\u1ea7u h\u1ebft m\u1ecdi ng\u01b0\u1eddi ngh\u0129. Vi\u1ec7c n\u00e2ng c\u1ea5p kh\u00f4ng thay \u0111\u1ed5i ng\u01b0\u1ee1ng d\u00f2ng r\u00f2 30mA (I\u0394n). N\u00f3 c\u00f3 th\u1ec3 gi\u00fap \u00edch n\u1ebfu s\u1ef1 c\u1ed1 c\u1ee7a b\u1ea1n b\u1eaft ngu\u1ed3n t\u1eeb s\u1ef1 kh\u00f4ng \u1ed5n \u0111\u1ecbnh nhi\u1ec7t ho\u1eb7c \u0111\u1ed9 nh\u1ea1y l\u1eafp \u0111\u1eb7t d\u01b0\u1edbi d\u00f2ng t\u1ea3i cao\u2014khung 63A l\u1edbn h\u01a1n ch\u1ea1y m\u00e1t h\u01a1n v\u00e0 c\u00f3 m\u1ea1ch t\u1eeb \u00edt nh\u1ea1y h\u01a1n. Nh\u01b0ng n\u1ebfu nguy\u00ean nh\u00e2n g\u1ed1c r\u1ec5 l\u00e0 d\u00f2ng r\u00f2 n\u1ec1n t\u00edch l\u0169y t\u1eeb c\u00e1c thi\u1ebft b\u1ecb \u0111i\u1ec7n t\u1eed, th\u00ec vi\u1ec7c ho\u00e1n \u0111\u1ed5i 63A s\u1ebd kh\u00f4ng kh\u1eafc ph\u1ee5c \u0111\u01b0\u1ee3c g\u00ec. H\u00e3y \u0111o d\u00f2ng r\u00f2 t\u0129nh c\u1ee7a b\u1ea1n tr\u01b0\u1edbc.<\/p>\n<p><strong>H: L\u00e0m c\u00e1ch n\u00e0o \u0111\u1ec3 \u0111o d\u00f2ng r\u00f2 \u0111\u1ea5t n\u1ec1n?<\/strong><\/p>\n<p>\u0110: S\u1eed d\u1ee5ng ampe k\u00ecm \u0111o d\u00f2ng r\u00f2 xung quanh d\u00e2y d\u1eabn \u0111\u1ea5t \u1edf ph\u00eda h\u1ea1 l\u01b0u c\u1ee7a RCD ho\u1eb7c xung quanh d\u00e2y pha v\u00e0 d\u00e2y trung t\u00ednh c\u00f9ng nhau cho t\u1eebng m\u1ea1ch ri\u00eang l\u1ebb. N\u1ebfu t\u1ed5ng d\u00f2ng r\u00f2 v\u01b0\u1ee3t qu\u00e1 9mA tr\u00ean RCD 30mA, b\u1ea1n c\u00f3 nguy c\u01a1 cao b\u1ecb ng\u1eaft do nhi\u1ec5u.<\/p>\n<p><strong>H: S\u1ef1 kh\u00e1c bi\u1ec7t gi\u1eefa RCD Lo\u1ea1i AC v\u00e0 Lo\u1ea1i A l\u00e0 g\u00ec?<\/strong><\/p>\n<p>\u0110: Lo\u1ea1i AC ch\u1ec9 ph\u00e1t hi\u1ec7n d\u00f2ng r\u00f2 AC h\u00ecnh sin thu\u1ea7n t\u00fay. N\u00f3 \u0111\u00e3 l\u1ed7i th\u1eddi \u0111\u1ed1i v\u1edbi c\u00e1c c\u00e0i \u0111\u1eb7t hi\u1ec7n \u0111\u1ea1i v\u00ec t\u1ea3i \u0111i\u1ec7n t\u1eed t\u1ea1o ra d\u00f2ng r\u00f2 DC xung m\u00e0 Lo\u1ea1i AC kh\u00f4ng th\u1ec3 x\u1eed l\u00fd m\u1ed9t c\u00e1ch \u0111\u00e1ng tin c\u1eady. Lo\u1ea1i A ph\u00e1t hi\u1ec7n c\u1ea3 d\u00f2ng r\u00f2 AC v\u00e0 DC xung, l\u00e0m cho n\u00f3 ph\u00f9 h\u1ee3p v\u1edbi c\u00e1c c\u00e0i \u0111\u1eb7t c\u00f3 ngu\u1ed3n \u0111i\u1ec7n chuy\u1ec3n m\u1ea1ch. \u00dac \u0111\u00e3 c\u1ea5m c\u00e1c c\u00e0i \u0111\u1eb7t Lo\u1ea1i AC m\u1edbi v\u00e0o n\u0103m 2023.<\/p>\n<p><strong>H: \u201cQuy t\u1eafc 30%\u201d cho d\u00f2ng r\u00f2 RCD l\u00e0 g\u00ec?<\/strong><\/p>\n<p>\u0110: H\u01b0\u1edbng d\u1eabn c\u1ee7a ng\u00e0nh khuy\u1ebfn ngh\u1ecb gi\u1eef d\u00f2ng r\u00f2 t\u0129nh d\u01b0\u1edbi 30% d\u00f2ng \u0111i\u1ec7n ng\u1eaft \u0111\u1ecbnh m\u1ee9c c\u1ee7a RCD (I\u0394n) \u0111\u1ec3 tr\u00e1nh ng\u1eaft do nhi\u1ec5u. \u0110\u1ed1i v\u1edbi RCD 30mA, \u0111i\u1ec1u \u0111\u00f3 c\u00f3 ngh\u0129a l\u00e0 gi\u1edbi h\u1ea1n d\u00f2ng r\u00f2 n\u1ec1n \u1edf kho\u1ea3ng 9mA, ch\u1eeba kho\u1ea3ng tr\u1ed1ng cho d\u00f2ng \u0111i\u1ec7n kh\u1edfi \u0111\u1ed9ng t\u1ee9c th\u1eddi.<\/p>\n<p><strong>H: T\u00f4i c\u00f3 n\u00ean n\u00e2ng c\u1ea5p l\u00ean RCBO hay ch\u1ec9 n\u00ean ti\u1ebfp t\u1ee5c s\u1eed d\u1ee5ng RCD?<\/strong><\/p>\n<p>\u0110: N\u1ebfu d\u00f2ng r\u00f2 n\u1ec1n \u0111o \u0111\u01b0\u1ee3c v\u01b0\u1ee3t qu\u00e1 9mA, RCBO l\u00e0 gi\u1ea3i ph\u00e1p ph\u00f9 h\u1ee3p. M\u1ed7i m\u1ea1ch c\u00f3 ng\u00e2n s\u00e1ch r\u00f2 30mA ri\u00eang, ng\u0103n ng\u1eeba s\u1ef1 t\u00edch l\u0169y. RCBO c\u0169ng khoanh v\u00f9ng s\u1ef1 c\u1ed1\u2014ch\u1ec9 m\u1ea1ch c\u00f3 v\u1ea5n \u0111\u1ec1 b\u1ecb ng\u1eaft. Chi ph\u00ed ban \u0111\u1ea7u th\u01b0\u1eddng \u0111\u01b0\u1ee3c thu h\u1ed3i trong v\u00f2ng 1-2 n\u0103m th\u00f4ng qua vi\u1ec7c gi\u1ea3m s\u1ed1 l\u1ea7n g\u1ecdi d\u1ecbch v\u1ee5 v\u00e0 th\u1eddi gian ng\u1eebng ho\u1ea1t \u0111\u1ed9ng.<\/p>\n<h2>B\u1ea3o v\u1ec7 h\u1ec7 th\u1ed1ng \u0111i\u1ec7n c\u1ee7a b\u1ea1n b\u1eb1ng chi\u1ebfn l\u01b0\u1ee3c ph\u00f9 h\u1ee3p<\/h2>\n<p>Vi\u1ec7c thay th\u1ebf RCD 40A b\u1eb1ng 63A l\u00e0 m\u1ed9t gi\u1ea3i ph\u00e1p t\u1ea1m th\u1eddi \u0111\u00f4i khi c\u00f3 hi\u1ec7u qu\u1ea3\u2014kh\u00f4ng ph\u1ea3i v\u00ec n\u00f3 l\u00e0m t\u0103ng kh\u1ea3 n\u0103ng ch\u1ecbu r\u00f2 r\u1ec9, m\u00e0 v\u00ec k\u00edch th\u01b0\u1edbc l\u1edbn h\u01a1n l\u00e0m gi\u1ea3m \u0111\u1ed9 nh\u1ea1y do nhi\u1ec7t v\u00e0 l\u1eafp \u0111\u1eb7t. \u0110\u00f3 l\u00e0 \u0111i\u1ec1u tr\u1ecb tri\u1ec7u ch\u1ee9ng, kh\u00f4ng ph\u1ea3i nguy\u00ean nh\u00e2n g\u1ed1c r\u1ec5: s\u1ef1 t\u00edch l\u0169y d\u00f2ng r\u00f2 n\u1ec1n t\u1eeb c\u00e1c t\u1ea3i \u0111i\u1ec7n t\u1eed hi\u1ec7n \u0111\u1ea1i.<\/p>\n<p>C\u00e1ch ti\u1ebfp c\u1eadn \u0111\u00fang \u0111\u1eafn b\u1eaft \u0111\u1ea7u b\u1eb1ng vi\u1ec7c \u0111o l\u01b0\u1eddng. S\u1eed d\u1ee5ng k\u00ecm \u0111o d\u00f2ng r\u00f2 \u0111\u1ec3 \u0111\u1ecbnh l\u01b0\u1ee3ng d\u00f2ng \u0111i\u1ec7n r\u00f2. X\u00e1c minh r\u1eb1ng b\u1ea1n \u0111ang s\u1eed d\u1ee5ng thi\u1ebft b\u1ecb Lo\u1ea1i A (kh\u00f4ng ph\u1ea3i Lo\u1ea1i AC). Ki\u1ec3m tra h\u00ecnh d\u1ea1ng l\u1eafp \u0111\u1eb7t. Sau \u0111\u00f3, thi\u1ebft k\u1ebf gi\u1ea3i ph\u00e1p ph\u00f9 h\u1ee3p: n\u1ebfu d\u00f2ng r\u00f2 th\u1ea5p, vi\u1ec7c n\u00e2ng c\u1ea5p l\u00ean 63A v\u1edbi c\u00e1c c\u1ea3i ti\u1ebfn l\u1eafp \u0111\u1eb7t c\u00f3 th\u1ec3 l\u00e0 \u0111\u1ee7. N\u1ebfu d\u00f2ng r\u00f2 v\u01b0\u1ee3t qu\u00e1 9mA, vi\u1ec7c chia m\u1ea1ch ho\u1eb7c chuy\u1ec3n sang RCBO l\u00e0 gi\u1ea3i ph\u00e1p l\u00e2u d\u00e0i.<\/p>\n<p>VIOX Electric s\u1ea3n xu\u1ea5t RCD, RCBO Lo\u1ea1i A v\u00e0 c\u00e1c ph\u1ee5 ki\u1ec7n gi\u00e1m s\u00e1t d\u00f2ng r\u00f2 \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf theo ti\u00eau chu\u1ea9n IEC 61008. \u0110\u1ed9i ng\u0169 k\u1ef9 thu\u1eadt c\u1ee7a ch\u00fang t\u00f4i c\u00f3 th\u1ec3 h\u1ed7 tr\u1ee3 t\u00ednh to\u00e1n d\u00f2ng r\u00f2, l\u1ef1a ch\u1ecdn thi\u1ebft b\u1ecb v\u00e0 \u0111\u1ec1 xu\u1ea5t ki\u1ebfn tr\u00fac t\u1ee7 \u0111i\u1ec7n. Truy c\u1eadp <a href=\"https:\/\/test.viox.com\/vi\/\">VIOX.com<\/a> \u0111\u1ec3 th\u1ea3o lu\u1eadn v\u1ec1 nh\u1eefng th\u00e1ch th\u1ee9c do ng\u1eaft m\u1ea1ch kh\u00f4ng mong mu\u1ed1n c\u1ee7a b\u1ea1n. \u0110\u1eebng \u0111\u1ec3 s\u1ef1 t\u00edch l\u0169y d\u00f2ng r\u00f2 \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn th\u1eddi gian ho\u1ea1t \u0111\u1ed9ng\u2014h\u00e3y thi\u1ebft k\u1ebf gi\u1ea3i ph\u00e1p, \u0111\u1eebng ch\u1ec9 thay th\u1ebf c\u00e1c b\u1ed9 ph\u1eadn.<\/p>\n<\/div>\n<div class=\"simg-pop-btn\" style=\"top: 4267.91px; left: 14px; display: none;\"><\/div>\n<div class=\"simg-pop-btn\" style=\"top: 4267.91px; left: 14px; display: none;\"><\/div>","protected":false},"excerpt":{"rendered":"<p>A contractor walks into a facility manager&#8217;s office. &#8220;The RCD keeps tripping in the server room,&#8221; the manager says. &#8220;We&#8217;ve checked everything. No insulation faults. But it still trips twice a week.&#8221; The contractor swaps the 40A RCD for a 63A unit. Same 30mA trip threshold\u2014just higher amperage. Two weeks later: no trips. Problem vanished. 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