{"id":9080,"date":"2026-04-14T01:00:48","date_gmt":"2026-04-14T08:00:48","guid":{"rendered":"https:\/\/bright-china.com\/?p=9080"},"modified":"2026-04-14T01:47:16","modified_gmt":"2026-04-14T08:47:16","slug":"cach-thuc-hoat-dong-cua-cac-thiet-bi-phat-hien-su-co-cham-mach-afdd","status":"publish","type":"post","link":"https:\/\/bright-china.com\/vi\/cach-thuc-hoat-dong-cua-cac-thiet-bi-phat-hien-su-co-cham-mach-afdd\/","title":{"rendered":"C\u01a1 ch\u1ebf ho\u1ea1t \u0111\u1ed9ng c\u1ee7a thi\u1ebft b\u1ecb ph\u00e1t hi\u1ec7n s\u1ef1 c\u1ed1 ch\u1ea1m m\u1ea1ch v\u00f2ng AFDD"},"content":{"rendered":"

L\u1ed7i h\u1ed3 quang l\u00e0 g\u00ec?<\/h2>\n

N\u00f3i m\u1ed9t c\u00e1ch \u0111\u01a1n gi\u1ea3n, s\u1ef1 c\u1ed1 h\u1ed3 quang l\u00e0 hi\u1ec7n t\u01b0\u1ee3ng d\u00f2ng \u0111i\u1ec7n \u201cnh\u1ea3y\u201d ho\u1eb7c \u201ct\u1ea1o tia l\u1eeda\u201d. Trong \u0111i\u1ec1u ki\u1ec7n b\u00ecnh th\u01b0\u1eddng, d\u00f2ng \u0111i\u1ec7n s\u1ebd ch\u1ea1y tr\u01a1n tru d\u1ecdc theo d\u00e2y d\u1eabn. Tuy nhi\u00ean, khi l\u1edbp c\u00e1ch \u0111i\u1ec7n c\u1ee7a d\u00e2y d\u1eabn b\u1ecb l\u00e3o h\u00f3a ho\u1eb7c h\u01b0 h\u1ecfng, ho\u1eb7c khi c\u00e1c \u0111i\u1ec3m n\u1ed1i b\u1ecb l\u1ecfng, d\u00f2ng \u0111i\u1ec7n s\u1ebd t\u00ecm \u0111\u01b0\u1eddng \u0111i kh\u00e1c \u2014 n\u00f3 nh\u1ea3y qua kho\u1ea3ng tr\u1ed1ng trong kh\u00f4ng kh\u00ed, t\u1ea1o ra tia l\u1eeda s\u00e1ng ch\u00f3i. \u0110\u00e2y ch\u00ednh l\u00e0 s\u1ef1 c\u1ed1 h\u1ed3 quang.<\/p>\n

\"Nguy\u00ean<\/p>\n

S\u1ef1 c\u1ed1 ch\u1eadp \u0111i\u1ec7n c\u00f3 nguy hi\u1ec3m \u0111\u1ebfn m\u1ee9c n\u00e0o?<\/h2>\n

S\u1ef1 c\u1ed1 h\u1ed3 quang t\u1ea1o ra nhi\u1ec7t \u0111\u1ed9 c\u1ef1c cao, v\u1edbi nhi\u1ec7t \u0111\u1ed9 t\u1ea1i t\u00e2m v\u01b0\u1ee3t qu\u00e1 3000\u00b0C \u2014 n\u00f3ng h\u01a1n c\u1ea3 qu\u00e1 tr\u00ecnh h\u00e0n! Ch\u00fang c\u00f3 th\u1ec3 ngay l\u1eadp t\u1ee9c l\u00e0m b\u00f9ng ch\u00e1y c\u00e1c v\u1eadt li\u1ec7u d\u1ec5 ch\u00e1y xung quanh nh\u01b0 g\u1ed7, v\u1ea3i v\u00e0 nh\u1ef1a. Th\u1ed1ng k\u00ea cho th\u1ea5y m\u1ed9t ph\u1ea7n \u0111\u00e1ng k\u1ec3 c\u00e1c v\u1ee5 h\u1ecfa ho\u1ea1n do \u0111i\u1ec7n g\u00e2y ra l\u00e0 do s\u1ef1 c\u1ed1 h\u1ed3 quang. \u0110i\u1ec1u \u0111\u00e1ng s\u1ee3 h\u01a1n n\u1eefa l\u00e0 c\u00e1c h\u1ed3 quang n\u1ed1i ti\u1ebfp (\u201c\u0111i\u1ec3m n\u1ed1i l\u1ecfng l\u1ebbo\u201d trong m\u1ea1ch \u0111i\u1ec7n) mang d\u00f2ng \u0111i\u1ec7n r\u1ea5t nh\u1ecf m\u00e0 c\u00e1c b\u1ed9 ng\u1eaft m\u1ea1ch ti\u00eau chu\u1ea9n kh\u00f4ng th\u1ec3 ph\u00e1t hi\u1ec7n \u0111\u01b0\u1ee3c, song nguy c\u01a1 h\u1ecfa ho\u1ea1n l\u1ea1i r\u1ea5t th\u1ef1c t\u1ebf.<\/p>\n

C\u00e1ch th\u1ee9c ho\u1ea1t \u0111\u1ed9ng nh\u01b0 th\u1ebf n\u00e0o AFDD<\/a> \u201cNh\u1eadn bi\u1ebft\u201d s\u1ef1 c\u1ed1 ch\u1ea1m m\u1ea1ch v\u00f2ng?<\/h2>\n

AFDD (Thi\u1ebft b\u1ecb ph\u00e1t hi\u1ec7n s\u1ef1 c\u1ed1 h\u1ed3 quang) ho\u1ea1t \u0111\u1ed9ng nh\u01b0 m\u1ed9t \u201cc\u1eb7p m\u1eaft c\u1ea3nh gi\u00e1c\u201d cho c\u00e1c m\u1ea1ch \u0111i\u1ec7n c\u1ee7a b\u1ea1n. Thi\u1ebft b\u1ecb n\u00e0y \u0111\u01b0\u1ee3c trang b\u1ecb c\u00e1c c\u1ea3m bi\u1ebfn c\u00f3 \u0111\u1ed9 nh\u1ea1y cao, gi\u00fap theo d\u00f5i d\u1ea1ng s\u00f3ng d\u00f2ng \u0111i\u1ec7n theo th\u1eddi gian th\u1ef1c. D\u1ea1ng s\u00f3ng d\u00f2ng \u0111i\u1ec7n b\u00ecnh th\u01b0\u1eddng th\u01b0\u1eddng m\u01b0\u1ee3t m\u00e0 v\u00e0 \u0111\u1ec1u \u0111\u1eb7n, trong khi d\u00f2ng \u0111i\u1ec7n h\u1ed3 quang l\u1ea1i c\u00f3 \u0111\u1eb7c \u0111i\u1ec3m bi\u1ebfn \u0111\u1ed5i theo h\u00ecnh \u201cr\u0103ng c\u01b0a\u201d. AFDD s\u1eed d\u1ee5ng c\u00e1c thu\u1eadt to\u00e1n th\u00f4ng minh \u0111\u1ec3 ph\u00e2n t\u00edch c\u00e1c \u0111\u1eb7c \u0111i\u1ec3m d\u1ea1ng s\u00f3ng n\u00e0y, t\u1eeb \u0111\u00f3 ph\u00e1t hi\u1ec7n c\u00e1c h\u1ed3 quang nguy hi\u1ec3m ch\u1ec9 trong v\u00e0i mili gi\u00e2y v\u00e0 ng\u1eaft ngu\u1ed3n \u0111i\u1ec7n ngay l\u1eadp t\u1ee9c.<\/p>\n

D\u00e3y d\u00e2y cung so v\u1edbi d\u00e2y cung song song<\/h2>\n
    \n
  • C\u00e2u chuy\u1ec7n ch\u00ednh<\/strong>: X\u1ea3y ra d\u1ecdc theo c\u00f9ng m\u1ed9t d\u00e2y d\u1eabn, ch\u1eb3ng h\u1ea1n nh\u01b0 \u0111\u1ee9t d\u00e2y b\u00ean trong ho\u1eb7c c\u00e1c \u0111i\u1ec3m n\u1ed1i l\u1ecfng l\u1ebbo. \u0110\u01b0\u1eddng d\u1eabn d\u00f2ng \u0111i\u1ec7n b\u1ecb \u201ck\u00e9o gi\u00e3n\u201d, t\u1ea1o ra tia l\u1eeda \u0111i\u1ec7n.<\/li>\n
  • H\u00ecnh cung song song<\/strong>: X\u1ea3y ra gi\u1eefa d\u00e2y pha v\u00e0 d\u00e2y trung t\u00ednh, ch\u1eb3ng h\u1ea1n nh\u01b0 khi l\u1edbp c\u00e1ch \u0111i\u1ec7n b\u1ecb h\u01b0 h\u1ecfng khi\u1ebfn hai d\u00e2y ch\u1ea1m v\u00e0o nhau. Lo\u1ea1i h\u1ed3 quang n\u00e0y mang n\u0103ng l\u01b0\u1ee3ng l\u1edbn h\u01a1n v\u00e0 nguy hi\u1ec3m h\u01a1n.<\/li>\n<\/ul>\n

    AFDD c\u00f3 th\u1ec3 ph\u00e1t hi\u1ec7n v\u00e0 b\u1ea3o v\u1ec7 hi\u1ec7u qu\u1ea3 tr\u01b0\u1edbc c\u1ea3 hai lo\u1ea1i s\u1ef1 c\u1ed1 h\u1ed3 quang.<\/p>\n

    T\u1ea1i sao ng\u00f4i nh\u00e0 c\u1ee7a b\u1ea1n c\u1ea7n AFDD?<\/h2>\n

    C\u00e1c lo\u1ea1i c\u1ea7u dao truy\u1ec1n th\u1ed1ng v\u00e0 RCD (thi\u1ebft b\u1ecb ph\u00e1t hi\u1ec7n d\u00f2ng r\u00f2) ch\u1ec9 b\u1ea3o v\u1ec7 kh\u1ecfi qu\u00e1 t\u1ea3i, ch\u1eadp \u0111i\u1ec7n v\u00e0 r\u00f2 r\u1ec9 d\u00f2ng \u0111i\u1ec7n \u2014 ch\u00fang ho\u00e0n to\u00e0n b\u1ea5t l\u1ef1c tr\u01b0\u1edbc c\u00e1c v\u1ee5 h\u1ecfa ho\u1ea1n do s\u1ef1 c\u1ed1 h\u1ed3 quang. AFDD (thi\u1ebft b\u1ecb ph\u00e1t hi\u1ec7n s\u1ef1 c\u1ed1 h\u1ed3 quang) ch\u00ednh l\u00e0 gi\u1ea3i ph\u00e1p l\u1ea5p \u0111\u1ea7y l\u1ed7 h\u1ed5ng an to\u00e0n n\u00e0y. S\u1ea3n ph\u1ea9m \u0111\u1eb7c bi\u1ec7t ph\u00f9 h\u1ee3p v\u1edbi c\u00e1c ng\u00f4i nh\u00e0 c\u0169, c\u00f4ng tr\u00ecnh b\u1eb1ng g\u1ed7 v\u00e0 c\u00e1c h\u1ed9 gia \u0111\u00ecnh s\u1eed d\u1ee5ng thi\u1ebft b\u1ecb \u0111i\u1ec7n c\u00f4ng su\u1ea5t l\u1edbn. L\u1eafp \u0111\u1eb7t AFDD gi\u1ed1ng nh\u01b0 vi\u1ec7c th\u00eam m\u1ed9t \u201ct\u01b0\u1eddng l\u1eeda\u201d cho h\u1ec7 th\u1ed1ng \u0111i\u1ec7n c\u1ee7a b\u1ea1n, mang l\u1ea1i s\u1ef1 an t\u00e2m h\u01a1n cho gia \u0111\u00ecnh.<\/p>","protected":false},"excerpt":{"rendered":"

    L\u1ed7i h\u1ed3 quang l\u00e0 g\u00ec? N\u00f3i m\u1ed9t c\u00e1ch \u0111\u01a1n gi\u1ea3n, l\u1ed7i h\u1ed3 quang l\u00e0 hi\u1ec7n t\u01b0\u1ee3ng d\u00f2ng \u0111i\u1ec7n \u201cnh\u1ea3y\u201d ho\u1eb7c \u201cph\u00e1t tia l\u1eeda\u201d. Trong \u0111i\u1ec1u ki\u1ec7n b\u00ecnh th\u01b0\u1eddng, d\u00f2ng \u0111i\u1ec7n s\u1ebd ch\u1ea1y tr\u01a1n tru d\u1ecdc theo d\u00e2y d\u1eabn. Tuy nhi\u00ean, khi l\u1edbp c\u00e1ch \u0111i\u1ec7n c\u1ee7a d\u00e2y d\u1eabn b\u1ecb l\u00e3o h\u00f3a ho\u1eb7c h\u01b0 h\u1ecfng, ho\u1eb7c khi c\u00e1c \u0111i\u1ec3m n\u1ed1i b\u1ecb l\u1ecfng, d\u00f2ng \u0111i\u1ec7n s\u1ebd t\u00ecm \u0111\u01b0\u1eddng \u0111i kh\u00e1c \u2014 n\u00f3 nh\u1ea3y qua c\u00e1c khe h\u1edf trong kh\u00f4ng kh\u00ed, t\u1ea1o ra tia l\u1eeda s\u00e1ng ch\u00f3i. \u0110\u00e2y l\u00e0 [\u2026]<\/p>","protected":false},"author":1,"featured_media":9082,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":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":"","theme-transparent-header-meta":"default","adv-header-id-meta":"","stick-header-meta":"default","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":"","_seo_title":"How AFDD Arc Fault Detection Devices Work","_seo_keywords":"Arc Fault, AFDD","_seo_description":"Simply put, an arc fault is electricity \"jumping\" or \"sparking.\" Under normal conditions, electric current flows obediently along the wires. But when wire insul"},"categories":[1],"tags":[],"class_list":["post-9080","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-news"],"acf":[],"seo_title":"How AFDD Arc Fault Detection Devices Work","seo_keywords":"Arc Fault, AFDD","seo_description":"Simply put, an arc fault is electricity \"jumping\" or \"sparking.\" Under normal conditions, electric current flows obediently along the wires. But when wire insul","seo_score":"90","_links":{"self":[{"href":"https:\/\/bright-china.com\/vi\/wp-json\/wp\/v2\/posts\/9080","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/bright-china.com\/vi\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/bright-china.com\/vi\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/bright-china.com\/vi\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/bright-china.com\/vi\/wp-json\/wp\/v2\/comments?post=9080"}],"version-history":[{"count":0,"href":"https:\/\/bright-china.com\/vi\/wp-json\/wp\/v2\/posts\/9080\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/bright-china.com\/vi\/wp-json\/wp\/v2\/media\/9082"}],"wp:attachment":[{"href":"https:\/\/bright-china.com\/vi\/wp-json\/wp\/v2\/media?parent=9080"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/bright-china.com\/vi\/wp-json\/wp\/v2\/categories?post=9080"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/bright-china.com\/vi\/wp-json\/wp\/v2\/tags?post=9080"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}