{"id":18696,"date":"2025-07-20T01:12:14","date_gmt":"2025-07-19T17:12:14","guid":{"rendered":"https:\/\/viox.com\/?p=18696"},"modified":"2025-07-20T01:12:16","modified_gmt":"2025-07-19T17:12:16","slug":"uc-up-mean-on-spd","status":"publish","type":"post","link":"https:\/\/test.viox.com\/vi\/uc-up-mean-on-spd\/","title":{"rendered":"Gi\u00e1 tr\u1ecb trung b\u00ecnh c\u1ee7a Uc UP tr\u00ean SPD: H\u01b0\u1edbng d\u1eabn \u0111\u1ea7y \u0111\u1ee7 v\u1ec1 c\u00e1c th\u00f4ng s\u1ed1 \u0111i\u1ec7n \u00e1p c\u1ee7a thi\u1ebft b\u1ecb ch\u1ed1ng s\u00e9t lan truy\u1ec1n"},"content":{"rendered":"<div class=\"product-intro\">\n<p><strong>Uc v\u00e0 Up l\u00e0 hai th\u00f4ng s\u1ed1 \u0111i\u1ec7n \u00e1p quan tr\u1ecdng quy\u1ebft \u0111\u1ecbnh hi\u1ec7u qu\u1ea3 c\u1ee7a <a href=\"https:\/\/test.viox.com\/vi\/spd\/\">Thi\u1ebft b\u1ecb ch\u1ed1ng s\u00e9t lan truy\u1ec1n (SPD)<\/a> trong vi\u1ec7c b\u1ea3o v\u1ec7 thi\u1ebft b\u1ecb \u0111i\u1ec7n c\u1ee7a b\u1ea1n.<\/strong> Uc \u0111\u1ea1i di\u1ec7n cho \u0111i\u1ec7n \u00e1p ho\u1ea1t \u0111\u1ed9ng li\u00ean t\u1ee5c t\u1ed1i \u0111a, trong khi Up bi\u1ec3u th\u1ecb m\u1ee9c \u0111i\u1ec7n \u00e1p b\u1ea3o v\u1ec7 gi\u1edbi h\u1ea1n \u0111i\u1ec7n \u00e1p xung trong qu\u00e1 tr\u00ecnh k\u00edch ho\u1ea1t. Hi\u1ec3u \u0111\u00fang c\u00e1c th\u00f4ng s\u1ed1 n\u00e0y \u0111\u1ea3m b\u1ea3o b\u1ea3o v\u1ec7 ch\u1ed1ng s\u00e9t t\u1ed1i \u01b0u v\u00e0 ng\u0103n ng\u1eeba h\u01b0 h\u1ecfng thi\u1ebft b\u1ecb t\u1ed1n k\u00e9m.<\/p>\n<h2>Uc v\u00e0 Up tr\u00ean SPD c\u00f3 ngh\u0129a l\u00e0 g\u00ec? \u0110\u1ecbnh ngh\u0129a c\u1ea7n thi\u1ebft<\/h2>\n<p><img fetchpriority=\"high\" decoding=\"async\" class=\"alignnone size-full wp-image-5502\" src=\"https:\/\/test.viox.com\/wp-content\/uploads\/2024\/09\/VIOX-VSP1-C40PV_3S-1000VD4-Pluggable-Multi-Pole-SPD01.webp\" alt=\"VIOX VSP1-C40PV\/3(S) 1000V(D4) Pluggable Multi-Pole SPD\" width=\"800\" height=\"800\" srcset=\"https:\/\/test.viox.com\/wp-content\/uploads\/2024\/09\/VIOX-VSP1-C40PV_3S-1000VD4-Pluggable-Multi-Pole-SPD01.webp 800w, https:\/\/test.viox.com\/wp-content\/uploads\/2024\/09\/VIOX-VSP1-C40PV_3S-1000VD4-Pluggable-Multi-Pole-SPD01-300x300.webp 300w, https:\/\/test.viox.com\/wp-content\/uploads\/2024\/09\/VIOX-VSP1-C40PV_3S-1000VD4-Pluggable-Multi-Pole-SPD01-150x150.webp 150w, https:\/\/test.viox.com\/wp-content\/uploads\/2024\/09\/VIOX-VSP1-C40PV_3S-1000VD4-Pluggable-Multi-Pole-SPD01-768x768.webp 768w, https:\/\/test.viox.com\/wp-content\/uploads\/2024\/09\/VIOX-VSP1-C40PV_3S-1000VD4-Pluggable-Multi-Pole-SPD01-600x600.webp 600w, https:\/\/test.viox.com\/wp-content\/uploads\/2024\/09\/VIOX-VSP1-C40PV_3S-1000VD4-Pluggable-Multi-Pole-SPD01-100x100.webp 100w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/><\/p>\n<h3>Uc: \u0110i\u1ec7n \u00e1p ho\u1ea1t \u0111\u1ed9ng li\u00ean t\u1ee5c t\u1ed1i \u0111a<\/h3>\n<p>Uc (\u0110i\u1ec7n \u00e1p ho\u1ea1t \u0111\u1ed9ng li\u00ean t\u1ee5c t\u1ed1i \u0111a) l\u00e0 \u0111i\u1ec7n \u00e1p AC ho\u1eb7c DC t\u1ed1i \u0111a c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c \u00e1p d\u1ee5ng li\u00ean t\u1ee5c cho SPD m\u00e0 kh\u00f4ng g\u00e2y ra k\u00edch ho\u1ea1t ho\u1eb7c suy gi\u1ea3m. Th\u00f4ng s\u1ed1 n\u00e0y x\u00e1c \u0111\u1ecbnh khi n\u00e0o SPD v\u1eabn kh\u00f4ng ho\u1ea1t \u0111\u1ed9ng trong \u0111i\u1ec1u ki\u1ec7n ho\u1ea1t \u0111\u1ed9ng b\u00ecnh th\u01b0\u1eddng.<\/p>\n<p><strong>C\u00e1c \u0111\u1eb7c \u0111i\u1ec3m ch\u00ednh c\u1ee7a Uc:<\/strong><\/p>\n<ul>\n<li>\u0110\u1ea1i di\u1ec7n cho gi\u00e1 tr\u1ecb hi\u1ec7u d\u1ee5ng t\u1ed1i \u0111a c\u1ee7a \u0111i\u1ec7n \u00e1p AC c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c \u00e1p d\u1ee5ng li\u00ean t\u1ee5c cho ch\u1ebf \u0111\u1ed9 b\u1ea3o v\u1ec7 SPD<\/li>\n<li>Ph\u1ea3i v\u01b0\u1ee3t qu\u00e1 \u0111i\u1ec7n \u00e1p danh \u0111\u1ecbnh c\u1ee7a h\u1ec7 th\u1ed1ng \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o ho\u1ea1t \u0111\u1ed9ng \u0111\u00fang<\/li>\n<li>N\u1ebfu ch\u1ecdn qu\u00e1 cao, SPD c\u00f3 th\u1ec3 kh\u00f4ng k\u00edch ho\u1ea1t trong c\u00e1c s\u1ef1 ki\u1ec7n xung \u0111i\u1ec7n<\/li>\n<li>V\u01b0\u1ee3t qu\u00e1 Uc s\u1ebd khi\u1ebfn thi\u1ebft b\u1ecb ch\u1ed1ng s\u00e9t lan truy\u1ec1n qu\u00e1 n\u00f3ng, \u0111\u1ea9y nhanh qu\u00e1 tr\u00ecnh l\u00e3o h\u00f3a v\u00e0 c\u00f3 kh\u1ea3 n\u0103ng b\u1ecb h\u1ecfng<\/li>\n<\/ul>\n<h3>Up: M\u1ee9c \u0111i\u1ec7n \u00e1p b\u1ea3o v\u1ec7<\/h3>\n<p>Up (M\u1ee9c \u0111i\u1ec7n \u00e1p b\u1ea3o v\u1ec7) l\u00e0 \u0111i\u1ec7n \u00e1p t\u1ed1i \u0111a tr\u00ean c\u00e1c \u0111\u1ea7u c\u1ef1c c\u1ee7a SPD khi n\u00f3 ho\u1ea1t \u0111\u1ed9ng, \u0111\u1ea1t \u0111\u01b0\u1ee3c khi d\u00f2ng \u0111i\u1ec7n ch\u1ea1y qua SPD b\u1eb1ng d\u00f2ng \u0111i\u1ec7n x\u1ea3 danh \u0111\u1ecbnh (In).<\/p>\n<p><strong>C\u00e1c \u0111\u1eb7c \u0111i\u1ec3m ch\u00ednh c\u1ee7a Up:<\/strong><\/p>\n<ul>\n<li>\u0110\u1ed1i v\u1edbi thi\u1ebft b\u1ecb ch\u1ed1ng s\u00e9t lan truy\u1ec1n lo\u1ea1i chuy\u1ec3n m\u1ea1ch \u0111i\u1ec7n \u00e1p, Up l\u00e0 \u0111i\u1ec7n \u00e1p x\u1ea3 t\u1ed1i \u0111a<\/li>\n<li>\u0110\u1ed1i v\u1edbi thi\u1ebft b\u1ecb ch\u1ed1ng s\u00e9t lan truy\u1ec1n lo\u1ea1i k\u1eb9p, Up \u0111\u1ea1i di\u1ec7n cho \u0111i\u1ec7n \u00e1p \u0111\u1ec9nh xu\u1ea5t hi\u1ec7n tr\u00ean c\u00e1c \u0111\u1ea7u c\u1ef1c trong qu\u00e1 tr\u00ecnh x\u1ea3<\/li>\n<li>Ph\u1ea3i th\u1ea5p h\u01a1n kh\u1ea3 n\u0103ng ch\u1ecbu qu\u00e1 \u0111i\u1ec7n \u00e1p c\u1ee7a thi\u1ebft b\u1ecb \u0111\u01b0\u1ee3c b\u1ea3o v\u1ec7<\/li>\n<li>Gi\u00e1 tr\u1ecb Up th\u1ea5p h\u01a1n cung c\u1ea5p kh\u1ea3 n\u0103ng b\u1ea3o v\u1ec7 t\u1ed1t h\u01a1n cho c\u00e1c thi\u1ebft b\u1ecb nh\u1ea1y c\u1ea3m<\/li>\n<\/ul>\n<p><img decoding=\"async\" class=\"alignnone  wp-image-18715\" src=\"https:\/\/test.viox.com\/wp-content\/uploads\/2025\/07\/current-characteristic-of-a-SPD.webp\" alt=\"current characteristic of a SPD\" width=\"513\" height=\"402\" srcset=\"https:\/\/test.viox.com\/wp-content\/uploads\/2025\/07\/current-characteristic-of-a-SPD.webp 352w, https:\/\/test.viox.com\/wp-content\/uploads\/2025\/07\/current-characteristic-of-a-SPD-300x235.webp 300w, https:\/\/test.viox.com\/wp-content\/uploads\/2025\/07\/current-characteristic-of-a-SPD-15x12.webp 15w\" sizes=\"(max-width: 513px) 100vw, 513px\" \/><\/p>\n<h2>B\u1ea3ng so s\u00e1nh SPD Uc v\u00e0 Up<\/h2>\n<table>\n<thead>\n<tr>\n<th>Tham s\u1ed1<\/th>\n<th>Uc (\u0110i\u1ec7n \u00e1p ho\u1ea1t \u0111\u1ed9ng li\u00ean t\u1ee5c t\u1ed1i \u0111a)<\/th>\n<th>Up (M\u1ee9c \u0111i\u1ec7n \u00e1p b\u1ea3o v\u1ec7)<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td><strong>\u0110\u1ecbnh ngh\u0129a<\/strong><\/td>\n<td>\u0110i\u1ec7n \u00e1p t\u1ed1i \u0111a cho ho\u1ea1t \u0111\u1ed9ng li\u00ean t\u1ee5c<\/td>\n<td>\u0110i\u1ec7n \u00e1p t\u1ed1i \u0111a trong qu\u00e1 tr\u00ecnh b\u1ea3o v\u1ec7 ch\u1ed1ng s\u00e9t<\/td>\n<\/tr>\n<tr>\n<td><strong>Ch\u1ee9c n\u0103ng<\/strong><\/td>\n<td>X\u00e1c \u0111\u1ecbnh ng\u01b0\u1ee1ng k\u00edch ho\u1ea1t SPD<\/td>\n<td>Gi\u1edbi h\u1ea1n \u0111i\u1ec7n \u00e1p xung cho thi\u1ebft b\u1ecb<\/td>\n<\/tr>\n<tr>\n<td><strong>Ti\u00eau ch\u00ed l\u1ef1a ch\u1ecdn<\/strong><\/td>\n<td>Ph\u1ea3i v\u01b0\u1ee3t qu\u00e1 \u0111i\u1ec7n \u00e1p danh \u0111\u1ecbnh c\u1ee7a h\u1ec7 th\u1ed1ng<\/td>\n<td>Ph\u1ea3i th\u1ea5p h\u01a1n \u0111i\u1ec7n \u00e1p ch\u1ecbu \u0111\u1ef1ng c\u1ee7a thi\u1ebft b\u1ecb<\/td>\n<\/tr>\n<tr>\n<td><strong>Gi\u00e1 tr\u1ecb \u0111i\u1ec3n h\u00ecnh (H\u1ec7 th\u1ed1ng 230V)<\/strong><\/td>\n<td>275V, 320V, 385V<\/td>\n<td>1.5kV, 2.5kV, 4kV<\/td>\n<\/tr>\n<tr>\n<td><strong>T\u00e1c \u0111\u1ed9ng an to\u00e0n<\/strong><\/td>\n<td>Ng\u0103n ng\u1eeba k\u00edch ho\u1ea1t s\u1edbm<\/td>\n<td>Ng\u0103n ng\u1eeba h\u01b0 h\u1ecfng thi\u1ebft b\u1ecb<\/td>\n<\/tr>\n<tr>\n<td><strong>Chu\u1ea9n T\u00e0i Li\u1ec7u Tham Kh\u1ea3o<\/strong><\/td>\n<td>Ti\u00eau chu\u1ea9n IEC 61643-11<\/td>\n<td>Ti\u00eau chu\u1ea9n IEC 61643-11<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p><img decoding=\"async\" class=\"alignnone size-full wp-image-17672\" src=\"https:\/\/test.viox.com\/wp-content\/uploads\/2025\/06\/VIOX-SPD.webp\" alt=\"VIOX SPD\" width=\"800\" height=\"776\" srcset=\"https:\/\/test.viox.com\/wp-content\/uploads\/2025\/06\/VIOX-SPD.webp 800w, https:\/\/test.viox.com\/wp-content\/uploads\/2025\/06\/VIOX-SPD-300x291.webp 300w, https:\/\/test.viox.com\/wp-content\/uploads\/2025\/06\/VIOX-SPD-768x745.webp 768w, https:\/\/test.viox.com\/wp-content\/uploads\/2025\/06\/VIOX-SPD-12x12.webp 12w, https:\/\/test.viox.com\/wp-content\/uploads\/2025\/06\/VIOX-SPD-600x582.webp 600w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/><\/p>\n<h2>C\u00e1ch ch\u1ecdn gi\u00e1 tr\u1ecb Uc cho c\u00e1c \u1ee9ng d\u1ee5ng kh\u00e1c nhau<\/h2>\n<h3>L\u1ef1a ch\u1ecdn Uc cho c\u00e1c h\u1ec7 th\u1ed1ng \u0111i\u1ec7n \u00e1p th\u00f4ng th\u01b0\u1eddng<\/h3>\n<p>D\u01b0\u1edbi \u0111\u00e2y l\u00e0 b\u1ea3ng hi\u1ec3n th\u1ecb c\u00e1c gi\u00e1 tr\u1ecb Uc \u0111\u01b0\u1ee3c khuy\u1ebfn ngh\u1ecb cho c\u00e1c h\u1ec7 th\u1ed1ng \u0111i\u1ec7n kh\u00e1c nhau:<\/p>\n<table>\n<thead>\n<tr>\n<th>H\u1ec7 Th\u1ed1ng \u0110i\u1ec7n \u00c1p<\/th>\n<th>Uc t\u1ed1i thi\u1ec3u c\u1ea7n thi\u1ebft<\/th>\n<th>Uc \u0111\u01b0\u1ee3c khuy\u1ebfn ngh\u1ecb<\/th>\n<th>H\u1ec7 s\u1ed1 an to\u00e0n<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>220V M\u1ed9t pha<\/td>\n<td>255V<\/td>\n<td>275V<\/td>\n<td>25%<\/td>\n<\/tr>\n<tr>\n<td>230V M\u1ed9t pha<\/td>\n<td>255V<\/td>\n<td>275V-320V<\/td>\n<td>20-39%<\/td>\n<\/tr>\n<tr>\n<td>380V Ba pha<\/td>\n<td>320V<\/td>\n<td>385V<\/td>\n<td>21%<\/td>\n<\/tr>\n<tr>\n<td>400V Ba pha<\/td>\n<td>460V<\/td>\n<td>500V<\/td>\n<td>25%<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<blockquote><p><strong>\ud83d\udca1 Chuy\u00ean Gia M\u1eb9o:<\/strong> \u0110\u1ed1i v\u1edbi h\u1ec7 th\u1ed1ng 230V, h\u00e3y ch\u1ecdn SPD c\u00f3 \u0111\u1ecbnh m\u1ee9c Uc \u00edt nh\u1ea5t l\u00e0 275V, v\u1edbi nhi\u1ec1u \u1ee9ng d\u1ee5ng s\u1eed d\u1ee5ng gi\u00e1 tr\u1ecb Uc l\u00e0 320V-385V \u0111\u1ec3 ph\u00f9 h\u1ee3p v\u1edbi s\u1ef1 dao \u0111\u1ed9ng \u0111i\u1ec7n \u00e1p v\u00e0 s\u1ef1 c\u1ed1 h\u1ec7 th\u1ed1ng.<\/p><\/blockquote>\n<h3>Quy tr\u00ecnh l\u1ef1a ch\u1ecdn Uc t\u1eebng b\u01b0\u1edbc<\/h3>\n<ol>\n<li><strong>X\u00e1c \u0111\u1ecbnh \u0111i\u1ec7n \u00e1p h\u1ec7 th\u1ed1ng<\/strong>\n<ul>\n<li>X\u00e1c \u0111\u1ecbnh \u0111i\u1ec7n \u00e1p ho\u1ea1t \u0111\u1ed9ng danh \u0111\u1ecbnh (Un)<\/li>\n<li>Ki\u1ec3m tra s\u01a1 \u0111\u1ed3 n\u1ed1i \u0111\u1ea5t c\u1ee7a h\u1ec7 th\u1ed1ng (TN, TT, IT)<\/li>\n<li>Xem x\u00e9t s\u1ef1 dao \u0111\u1ed9ng \u0111i\u1ec7n \u00e1p (th\u01b0\u1eddng l\u00e0 \u00b110%)<\/li>\n<\/ul>\n<\/li>\n<li><strong>T\u00ednh to\u00e1n y\u00eau c\u1ea7u Uc t\u1ed1i thi\u1ec3u<\/strong>\n<ul>\n<li>Khi x\u1ea3y ra s\u1ef1 c\u1ed1 ch\u1ea1m \u0111\u1ea5t m\u1ed9t pha, c\u00e1c pha c\u00f2n l\u1ea1i ch\u1ecbu \u0111i\u1ec7n \u00e1p pha b\u00ecnh th\u01b0\u1eddng g\u1ea5p \u221a3 l\u1ea7n<\/li>\n<li>\u00c1p d\u1ee5ng h\u1ec7 s\u1ed1 an to\u00e0n: Uc \u2265 1.3 \u00d7 Un (khuy\u1ebfn ngh\u1ecb)<\/li>\n<\/ul>\n<\/li>\n<li><strong>Ch\u1ecdn gi\u00e1 tr\u1ecb Uc ph\u00f9 h\u1ee3p<\/strong>\n<ul>\n<li>Ch\u1ecdn t\u1eeb c\u00e1c gi\u00e1 tr\u1ecb ti\u00eau chu\u1ea9n: 255V, 275V, 320V, 385V, 420V<\/li>\n<li>C\u00e2n b\u1eb1ng gi\u1eefa bi\u00ean \u0111\u1ed9 \u0111\u1ea7y \u0111\u1ee7 v\u00e0 b\u1ea3o v\u1ec7 hi\u1ec7u qu\u1ea3<\/li>\n<\/ul>\n<\/li>\n<\/ol>\n<blockquote><p><strong>Dr. Tr\u01b0\u1edbc An To\u00e0n C\u1ea3nh B\u00e1o:<\/strong> Ch\u1ecdn Uc qu\u00e1 cao d\u1eabn \u0111\u1ebfn SPD kh\u00f4ng b\u1eaft \u0111\u1ea7u c\u00e1c h\u00e0nh \u0111\u1ed9ng b\u1ea3o v\u1ec7 v\u00e0 kh\u00f4ng c\u00f3 kh\u1ea3 n\u0103ng x\u1ea3 hi\u1ec7u qu\u1ea3 d\u00f2ng \u0111i\u1ec7n xung.<\/p><\/blockquote>\n<h2>H\u01b0\u1edbng d\u1eabn l\u1ef1a ch\u1ecdn Up: \u0110\u1ea3m b\u1ea3o b\u1ea3o v\u1ec7 thi\u1ebft b\u1ecb \u0111\u1ea7y \u0111\u1ee7<\/h2>\n<h3>Hi\u1ec3u c\u00e1c y\u00eau c\u1ea7u Up<\/h3>\n<p>\u0110\u1ec3 \u0111\u1ea3m b\u1ea3o b\u1ea3o v\u1ec7 hi\u1ec7u qu\u1ea3, m\u1ee9c \u0111i\u1ec7n \u00e1p b\u1ea3o v\u1ec7 Up ph\u1ea3i th\u1ea5p h\u01a1n \u0111i\u1ec7n \u00e1p ch\u1ecbu xung \u0111\u1ecbnh m\u1ee9c Uw c\u1ee7a thi\u1ebft b\u1ecb c\u1ea7n b\u1ea3o v\u1ec7, v\u1edbi h\u1ec7 s\u1ed1 an to\u00e0n chung \u00edt nh\u1ea5t l\u00e0 20% (Up \u2264 0.8 \u00d7 Uw).<\/p>\n<h3>\u0110i\u1ec7n \u00e1p ch\u1ecbu xung c\u1ee7a thi\u1ebft b\u1ecb<\/h3>\n<table>\n<thead>\n<tr>\n<th>Lo\u1ea1i Thi\u1ebft B\u1ecb<\/th>\n<th>\u0110i\u1ec7n \u00c1p Ch\u1ecbu Xung \u0110i\u1ec3n H\u00ecnh (Uw)<\/th>\n<th>Up Y\u00eau C\u1ea7u (T\u1ed1i \u0110a)<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>Thi\u1ebft B\u1ecb \u0110i\u1ec7n T\u1eed Nh\u1ea1y C\u1ea3m<\/td>\n<td>1.5kV<\/td>\n<td>\u22641.2kV<\/td>\n<\/tr>\n<tr>\n<td>Thi\u1ebft B\u1ecb IT Ti\u00eau Chu\u1ea9n<\/td>\n<td>2,5kV<\/td>\n<td>\u22642,0kV<\/td>\n<\/tr>\n<tr>\n<td>Thi\u1ebft b\u1ecb c\u00f4ng nghi\u1ec7p<\/td>\n<td>4.0kV<\/td>\n<td>\u22643,2kV<\/td>\n<\/tr>\n<tr>\n<td>C\u00f4ng Nghi\u1ec7p N\u1eb7ng<\/td>\n<td>6.0kV<\/td>\n<td>\u22644.8kV<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h3>Quy Tr\u00ecnh Ch\u1ecdn Up<\/h3>\n<ol>\n<li><strong>X\u00e1c \u0110\u1ecbnh Y\u00eau C\u1ea7u Thi\u1ebft B\u1ecb<\/strong>\n<ul>\n<li>X\u00e1c \u0111\u1ecbnh \u0111i\u1ec7n \u00e1p xung \u0111\u1ecbnh m\u1ee9c Uw c\u1ee7a thi\u1ebft b\u1ecb \u0111\u01b0\u1ee3c b\u1ea3o v\u1ec7<\/li>\n<li>Xem x\u00e9t m\u1ee9c mi\u1ec5n nhi\u1ec5m EMC theo <a href=\"https:\/\/webstore.iec.ch\/en\/publication\/4223\" rel=\"nofollow noopener\" target=\"_blank\">IEC 61000-4-5<\/a><\/li>\n<\/ul>\n<\/li>\n<li><strong>\u00c1p D\u1ee5ng H\u1ec7 S\u1ed1 An To\u00e0n<\/strong>\n<ul>\n<li>T\u00ednh to\u00e1n Up t\u1ed1i \u0111a cho ph\u00e9p: Up \u2264 0.8 \u00d7 Uw<\/li>\n<li>\u0110\u1ed1i v\u1edbi c\u00e1c l\u1eafp \u0111\u1eb7t 230\/400V, Up \u0111\u00e3 l\u1eafp \u0111\u1eb7t th\u01b0\u1eddng ph\u1ea3i \u22642.5kV<\/li>\n<\/ul>\n<\/li>\n<li><strong>Xem X\u00e9t \u1ea2nh H\u01b0\u1edfng L\u1eafp \u0110\u1eb7t<\/strong>\n<ul>\n<li>T\u00ednh \u0111\u1ebfn s\u1ef1 s\u1ee5t \u00e1p trong d\u00e2y k\u1ebft n\u1ed1i<\/li>\n<li>T\u00ednh \u0111\u1ebfn s\u1ef1 ph\u1ed1i h\u1ee3p v\u1edbi SPD th\u01b0\u1ee3ng ngu\u1ed3n\/h\u1ea1 ngu\u1ed3n<\/li>\n<\/ul>\n<\/li>\n<\/ol>\n<h2>C\u00e1c Gi\u00e1 Tr\u1ecb Uc v\u00e0 Up Ph\u1ed5 Bi\u1ebfn Theo \u1ee8ng D\u1ee5ng<\/h2>\n<h3>\u1ee8ng d\u1ee5ng d\u00e2n d\u1ee5ng<\/h3>\n<table>\n<thead>\n<tr>\n<th>\u1ee8ng d\u1ee5ng<\/th>\n<th>Uc \u0111\u01b0\u1ee3c khuy\u1ebfn ngh\u1ecb<\/th>\n<th>Up \u0110i\u1ec3n H\u00ecnh<\/th>\n<th>M\u1ee9c \u0111\u1ed9 b\u1ea3o v\u1ec7<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>T\u1ee7 \u0110i\u1ec7n Ch\u00ednh (230V)<\/td>\n<td>275V<\/td>\n<td>1.5-2.5kV<\/td>\n<td>2\u578b<\/td>\n<\/tr>\n<tr>\n<td>B\u1ea3ng \u0111i\u1ec1u khi\u1ec3n ph\u1ee5<\/td>\n<td>275V<\/td>\n<td>1.5kV<\/td>\n<td>2\u578b<\/td>\n<\/tr>\n<tr>\n<td>Thi\u1ebft B\u1ecb Nh\u1ea1y C\u1ea3m<\/td>\n<td>275V<\/td>\n<td>\u22641.2kV<\/td>\n<td>Lo\u1ea1i 3<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h3>\u1ee8ng D\u1ee5ng Th\u01b0\u01a1ng M\u1ea1i\/C\u00f4ng Nghi\u1ec7p<\/h3>\n<table>\n<thead>\n<tr>\n<th>\u1ee8ng d\u1ee5ng<\/th>\n<th>Uc \u0111\u01b0\u1ee3c khuy\u1ebfn ngh\u1ecb<\/th>\n<th>Up \u0110i\u1ec3n H\u00ecnh<\/th>\n<th>M\u1ee9c \u0111\u1ed9 b\u1ea3o v\u1ec7<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>Ph\u00e2n Ph\u1ed1i Ch\u00ednh (400V)<\/td>\n<td>460V<\/td>\n<td>2.5-4kV<\/td>\n<td>Lo\u1ea1i 1+2<\/td>\n<\/tr>\n<tr>\n<td>Trung t\u00e2m \u0111i\u1ec1u khi\u1ec3n \u0111\u1ed9ng c\u01a1<\/td>\n<td>385V<\/td>\n<td>2,5kV<\/td>\n<td>2\u578b<\/td>\n<\/tr>\n<tr>\n<td>B\u1ea3o V\u1ec7 Thi\u1ebft B\u1ecb IT<\/td>\n<td>275V<\/td>\n<td>1.5kV<\/td>\n<td>Lo\u1ea1i 3<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<blockquote><p><strong>\ud83d\udca1 Chuy\u00ean Gia M\u1eb9o:<\/strong> Trong c\u00e1c \u1ee9ng d\u1ee5ng th\u1ef1c t\u1ebf, c\u00e1c gi\u00e1 tr\u1ecb Uc t\u1eeb 320V-385V th\u01b0\u1eddng \u0111\u01b0\u1ee3c ch\u1ecdn cho c\u00e1c h\u1ec7 th\u1ed1ng ba pha \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o \u0111\u1ee7 bi\u00ean \u0111\u1ed9 ngay c\u1ea3 khi SPD b\u1ecb l\u00e3o h\u00f3a.<\/p><\/blockquote>\n<h2>M\u1ed1i Quan H\u1ec7 Gi\u1eefa C\u00e1c Gi\u00e1 Tr\u1ecb Uc v\u00e0 Up<\/h2>\n<h3>Uc \u1ea2nh H\u01b0\u1edfng \u0110\u1ebfn Hi\u1ec7u Su\u1ea5t Up Nh\u01b0 Th\u1ebf N\u00e0o<\/h3>\n<p>Gi\u00e1 tr\u1ecb Up c\u1ee7a SPD c\u00f3 li\u00ean quan \u0111\u1ebfn gi\u00e1 tr\u1ecb Uc \u2013 gi\u00e1 tr\u1ecb Uc l\u1edbn h\u01a1n th\u01b0\u1eddng d\u1eabn \u0111\u1ebfn gi\u00e1 tr\u1ecb Up cao h\u01a1n. M\u1ed1i quan h\u1ec7 n\u00e0y \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn hi\u1ec7u qu\u1ea3 b\u1ea3o v\u1ec7:<\/p>\n<p><strong>C\u00e1c M\u1ed1i Quan H\u1ec7 Ch\u00ednh:<\/strong><\/p>\n<ul>\n<li>Uc Cao H\u01a1n = Ng\u01b0\u1ee1ng k\u00edch ho\u1ea1t cao h\u01a1n<\/li>\n<li>Uc Cao H\u01a1n = Gi\u00e1 tr\u1ecb Up th\u01b0\u1eddng cao h\u01a1n<\/li>\n<li>Up Cao H\u01a1n = Gi\u1ea3m kh\u1ea3 n\u0103ng b\u1ea3o v\u1ec7 cho thi\u1ebft b\u1ecb nh\u1ea1y c\u1ea3m<\/li>\n<li>Gi\u00e1 tr\u1ecb Uc l\u1edbn h\u01a1n d\u1eabn \u0111\u1ebfn \u0111i\u1ec7n \u00e1p kh\u1edfi \u0111\u1ed9ng v\u00e0 \u0111i\u1ec7n \u00e1p d\u01b0 cao h\u01a1n<\/li>\n<\/ul>\n<h3>Chi\u1ebfn L\u01b0\u1ee3c T\u1ed1i \u01afu H\u00f3a<\/h3>\n<ol>\n<li><strong>Ch\u1ecdn Uc t\u1ed1i thi\u1ec3u ph\u00f9 h\u1ee3p<\/strong>\n<ul>\n<li>\u0110\u00e1p \u1ee9ng c\u00e1c y\u00eau c\u1ea7u v\u1ec1 \u0111i\u1ec7n \u00e1p h\u1ec7 th\u1ed1ng<\/li>\n<li>Cho ph\u00e9p dao \u0111\u1ed9ng \u0111i\u1ec7n \u00e1p<\/li>\n<li>Tr\u00e1nh c\u00e1c gi\u00e1 tr\u1ecb qu\u00e1 cao kh\u00f4ng c\u1ea7n thi\u1ebft l\u00e0m \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn kh\u1ea3 n\u0103ng b\u1ea3o v\u1ec7<\/li>\n<\/ul>\n<\/li>\n<li><strong>X\u00e1c minh t\u00ednh t\u01b0\u01a1ng th\u00edch c\u1ee7a Up<\/strong>\n<ul>\n<li>\u0110\u1ea3m b\u1ea3o Up &lt; \u0111i\u1ec7n \u00e1p ch\u1ecbu \u0111\u1ef1ng c\u1ee7a thi\u1ebft b\u1ecb<\/li>\n<li>Xem x\u00e9t c\u00e1c y\u00eau c\u1ea7u ph\u1ed1i h\u1ee3p<\/li>\n<li>T\u00ednh \u0111\u1ebfn s\u1ef1 s\u1ee5t \u00e1p l\u1eafp \u0111\u1eb7t<\/li>\n<\/ul>\n<\/li>\n<\/ol>\n<h2>L\u1ef1a Ch\u1ecdn SPD Theo Lo\u1ea1i H\u1ec7 Th\u1ed1ng<\/h2>\n<h3>Y\u00eau C\u1ea7u H\u1ec7 Th\u1ed1ng TN<\/h3>\n<p>\u0110\u1ed1i v\u1edbi c\u00e1c h\u1ec7 th\u1ed1ng TN (TN-C, TN-S, TN-C-S), n\u01a1i trung t\u00ednh \u0111\u01b0\u1ee3c n\u1ed1i \u0111\u1ea5t, c\u1ea7n c\u00f3 c\u00e1c c\u1ea5u h\u00ecnh SPD kh\u00e1c nhau:<\/p>\n<table>\n<thead>\n<tr>\n<th>Lo\u1ea1i H\u1ec7 Th\u1ed1ng<\/th>\n<th>C\u1ea5u H\u00ecnh SPD<\/th>\n<th>Uc \u0110i\u1ec3n H\u00ecnh<\/th>\n<th>Ghi ch\u00fa<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>TN-C<\/td>\n<td>3P (B\u1ea3o v\u1ec7 L-PEN)<\/td>\n<td>275V-385V<\/td>\n<td>Trung t\u00ednh-\u0111\u1ea5t k\u1ebft h\u1ee3p<\/td>\n<\/tr>\n<tr>\n<td>TN-S<\/td>\n<td>3P+N (L-PE, N-PE)<\/td>\n<td>275V-385V<\/td>\n<td>Trung t\u00ednh, \u0111\u1ea5t ri\u00eang bi\u1ec7t<\/td>\n<\/tr>\n<tr>\n<td>TN-C-S<\/td>\n<td>3P+N t\u1ea1i \u0111i\u1ec3m chuy\u1ec3n \u0111\u1ed5i<\/td>\n<td>275V-385V<\/td>\n<td>\u0110i\u1ec3m chuy\u1ec3n ti\u1ebfp quan tr\u1ecdng<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h3>Y\u00eau c\u1ea7u h\u1ec7 th\u1ed1ng TT<\/h3>\n<p>H\u1ec7 th\u1ed1ng TT y\u00eau c\u1ea7u b\u1ea3o v\u1ec7 ch\u1ed1ng l\u1ea1i c\u1ea3 qu\u00e1 \u0111i\u1ec7n \u00e1p ch\u1ebf \u0111\u1ed9 chung v\u00e0 ch\u1ebf \u0111\u1ed9 vi sai do s\u1ef1 b\u1ea5t \u0111\u1ed1i x\u1ee9ng tr\u1edf kh\u00e1ng \u0111\u1ea5t.<\/p>\n<h3>Y\u00eau c\u1ea7u h\u1ec7 th\u1ed1ng IT<\/h3>\n<p>H\u1ec7 th\u1ed1ng IT kh\u00f4ng c\u00f3 k\u1ebft n\u1ed1i \u0111\u1ea5t tr\u1ef1c ti\u1ebfp ho\u1eb7c k\u1ebft n\u1ed1i \u0111\u1ea5t tr\u1edf kh\u00e1ng cao, cho ph\u00e9p ti\u1ebfp t\u1ee5c ho\u1ea1t \u0111\u1ed9ng trong tr\u01b0\u1eddng h\u1ee3p c\u00f3 s\u1ef1 c\u1ed1 ch\u1ea1m \u0111\u1ea5t \u0111\u01a1n.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-16658\" src=\"https:\/\/test.viox.com\/wp-content\/uploads\/2025\/05\/Different-varieties-and-colors-of-SPDs-are-displayed-on-the-wall.webp\" alt=\"Different varieties and colors of SPDs are displayed on the wall.\" width=\"800\" height=\"684\" srcset=\"https:\/\/test.viox.com\/wp-content\/uploads\/2025\/05\/Different-varieties-and-colors-of-SPDs-are-displayed-on-the-wall.webp 800w, https:\/\/test.viox.com\/wp-content\/uploads\/2025\/05\/Different-varieties-and-colors-of-SPDs-are-displayed-on-the-wall-300x257.webp 300w, https:\/\/test.viox.com\/wp-content\/uploads\/2025\/05\/Different-varieties-and-colors-of-SPDs-are-displayed-on-the-wall-768x657.webp 768w, https:\/\/test.viox.com\/wp-content\/uploads\/2025\/05\/Different-varieties-and-colors-of-SPDs-are-displayed-on-the-wall-14x12.webp 14w, https:\/\/test.viox.com\/wp-content\/uploads\/2025\/05\/Different-varieties-and-colors-of-SPDs-are-displayed-on-the-wall-600x513.webp 600w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/><\/p>\n<h2>Kh\u1eafc ph\u1ee5c s\u1ef1 c\u1ed1 Uc v\u00e0 Up th\u01b0\u1eddng g\u1eb7p<\/h2>\n<h3>V\u1ea5n \u0111\u1ec1: SPD kh\u00f4ng k\u00edch ho\u1ea1t khi c\u00f3 xung \u0111i\u1ec7n<\/h3>\n<p><strong>Nguy\u00ean nh\u00e2n c\u00f3 th\u1ec3 x\u1ea3y ra:<\/strong><\/p>\n<ul>\n<li>Gi\u00e1 tr\u1ecb Uc \u0111\u01b0\u1ee3c ch\u1ecdn qu\u00e1 cao so v\u1edbi \u0111i\u1ec1u ki\u1ec7n h\u1ec7 th\u1ed1ng<\/li>\n<li>\u0110\u00e1nh gi\u00e1 n\u1ed1i \u0111\u1ea5t h\u1ec7 th\u1ed1ng kh\u00f4ng ch\u00ednh x\u00e1c<\/li>\n<li>SPD xu\u1ed1ng c\u1ea5p theo th\u1eddi gian<\/li>\n<\/ul>\n<p><strong>Gi\u1ea3i ph\u00e1p:<\/strong><\/p>\n<ol>\n<li>T\u00ednh to\u00e1n l\u1ea1i \u0111i\u1ec7n \u00e1p h\u1ec7 th\u1ed1ng bao g\u1ed3m c\u00e1c \u0111i\u1ec1u ki\u1ec7n s\u1ef1 c\u1ed1<\/li>\n<li>Ch\u1ecdn gi\u00e1 tr\u1ecb Uc th\u1ea5p h\u01a1n trong ph\u1ea1m vi ho\u1ea1t \u0111\u1ed9ng an to\u00e0n<\/li>\n<li>X\u00e1c minh lo\u1ea1i v\u00e0 c\u1ea5u h\u00ecnh h\u1ec7 th\u1ed1ng n\u1ed1i \u0111\u1ea5t<\/li>\n<\/ol>\n<h3>V\u1ea5n \u0111\u1ec1: Thi\u1ebft b\u1ecb b\u1ecb h\u01b0 h\u1ecfng m\u1eb7c d\u00f9 \u0111\u00e3 l\u1eafp \u0111\u1eb7t SPD<\/h3>\n<p><strong>Nguy\u00ean nh\u00e2n c\u00f3 th\u1ec3 x\u1ea3y ra:<\/strong><\/p>\n<ul>\n<li>Gi\u00e1 tr\u1ecb Up v\u01b0\u1ee3t qu\u00e1 \u0111i\u1ec7n \u00e1p ch\u1ecbu \u0111\u1ef1ng c\u1ee7a thi\u1ebft b\u1ecb<\/li>\n<li>Ph\u1ed1i h\u1ee3p kh\u00f4ng \u0111\u1ea7y \u0111\u1ee7 gi\u1eefa c\u00e1c c\u1ea5p SPD<\/li>\n<li>L\u1eafp \u0111\u1eb7t ho\u1eb7c n\u1ed1i \u0111\u1ea5t SPD k\u00e9m<\/li>\n<\/ul>\n<p><strong>Gi\u1ea3i ph\u00e1p:<\/strong><\/p>\n<ol>\n<li>\u0110\u1ea3m b\u1ea3o Up \u2264 0,8 \u00d7 \u0111i\u1ec7n \u00e1p ch\u1ecbu xung c\u1ee7a thi\u1ebft b\u1ecb<\/li>\n<li>L\u1eafp \u0111\u1eb7t h\u1ec7 th\u1ed1ng SPD ph\u1ed1i h\u1ee3p \u1edf nhi\u1ec1u c\u1ea5p \u0111\u1ed9<\/li>\n<li>X\u00e1c minh c\u00e1c k\u1ebft n\u1ed1i \u0111\u1ea5t c\u00f3 \u0111i\u1ec7n tr\u1edf th\u1ea5p<\/li>\n<\/ol>\n<h3>V\u1ea5n \u0111\u1ec1: Thay th\u1ebf SPD th\u01b0\u1eddng xuy\u00ean<\/h3>\n<p><strong>Nguy\u00ean nh\u00e2n c\u00f3 th\u1ec3 x\u1ea3y ra:<\/strong><\/p>\n<ul>\n<li>Gi\u00e1 tr\u1ecb Uc qu\u00e1 g\u1ea7n v\u1edbi \u0111i\u1ec7n \u00e1p ho\u1ea1t \u0111\u1ed9ng c\u1ee7a h\u1ec7 th\u1ed1ng<\/li>\n<li>Qu\u00e1 \u0111i\u1ec7n \u00e1p t\u1ea1m th\u1eddi qu\u00e1 m\u1ee9c<\/li>\n<li>Suy tho\u00e1i m\u00f4i tr\u01b0\u1eddng<\/li>\n<\/ul>\n<p><strong>Gi\u1ea3i ph\u00e1p:<\/strong><\/p>\n<ol>\n<li>T\u0103ng bi\u00ean \u0111\u1ed9 an to\u00e0n Uc<\/li>\n<li>Gi\u1ea3i quy\u1ebft c\u00e1c v\u1ea5n \u0111\u1ec1 v\u1ec1 ch\u1ea5t l\u01b0\u1ee3ng \u0111i\u1ec7n n\u0103ng \u1edf ngu\u1ed3n<\/li>\n<li>Th\u1ef1c hi\u1ec7n l\u1ecbch b\u1ea3o tr\u00ec th\u01b0\u1eddng xuy\u00ean<\/li>\n<\/ol>\n<h2>Y\u00eau C\u1ea7u an to\u00e0n v\u00e0 Tu\u00e2n th\u1ee7 M\u00e3<\/h2>\n<h3>Y\u00eau c\u1ea7u ti\u00eau chu\u1ea9n IEC<\/h3>\n<p><a href=\"https:\/\/webstore.iec.ch\/en\/publication\/5682\" rel=\"nofollow noopener\" target=\"_blank\">Ti\u00eau chu\u1ea9n IEC 61643-11<\/a> quy \u0111\u1ecbnh c\u00e1c y\u00eau c\u1ea7u \u0111\u1ed1i v\u1edbi SPD trong h\u1ec7 th\u1ed1ng ph\u00e2n ph\u1ed1i \u0111i\u1ec7n h\u1ea1 th\u1ebf, trong khi IEC 62305-4 \u0111\u1ec1 c\u1eadp \u0111\u1ebfn c\u00e1c y\u00eau c\u1ea7u h\u1ec7 th\u1ed1ng ch\u1ed1ng s\u00e9t.<\/p>\n<p><strong>C\u00e1c y\u00eau c\u1ea7u an to\u00e0n ch\u00ednh:<\/strong><\/p>\n<ul>\n<li>SPD lo\u1ea1i 1 v\u1edbi Iimp \u226512,5kA cho c\u00e1c c\u00f4ng tr\u00ecnh c\u00f3 h\u1ec7 th\u1ed1ng ch\u1ed1ng s\u00e9t<\/li>\n<li>SPD lo\u1ea1i 2 v\u1edbi In \u22655kA cho c\u00e1c c\u00f4ng tr\u00ecnh AC ti\u00eau chu\u1ea9n<\/li>\n<li>Ph\u1ed1i h\u1ee3p th\u00edch h\u1ee3p gi\u1eefa c\u00e1c c\u1ea5p b\u1ea3o v\u1ec7<\/li>\n<\/ul>\n<h3>H\u01b0\u1edbng d\u1eabn an to\u00e0n l\u1eafp \u0111\u1eb7t<\/h3>\n<p><strong>\u26a0\ufe0f C\u00e1c \u0111i\u1ec3m an to\u00e0n quan tr\u1ecdng:<\/strong><\/p>\n<ul>\n<li>Vi\u1ec7c l\u1eafp \u0111\u1eb7t ph\u1ea3i \u0111\u01b0\u1ee3c th\u1ef1c hi\u1ec7n b\u1edfi th\u1ee3 \u0111i\u1ec7n \u0111\u01b0\u1ee3c ch\u1ee9ng nh\u1eadn<\/li>\n<li>N\u1ed1i \u0111\u1ea5t \u0111\u00fang c\u00e1ch l\u00e0 \u0111i\u1ec1u c\u1ea7n thi\u1ebft cho ho\u1ea1t \u0111\u1ed9ng c\u1ee7a SPD<\/li>\n<li>Y\u00eau c\u1ea7u ki\u1ec3m tra v\u00e0 b\u1ea3o tr\u00ec th\u01b0\u1eddng xuy\u00ean<\/li>\n<li>SPD n\u00ean bao g\u1ed3m c\u00e1c t\u00ednh n\u0103ng ch\u1ec9 b\u00e1o l\u1ed7i<\/li>\n<\/ul>\n<h2>Chuy\u00ean Gia L\u1ef1a Ch\u1ecdn L\u1eddi Khuy\u00ean<\/h2>\n<h3>\u0110\u1ec1 Ngh\u1ecb Chuy\u00ean Nghi\u1ec7p<\/h3>\n<ol>\n<li><strong>Lu\u00f4n ch\u1ecdn SPD \u0111\u01b0\u1ee3c ch\u1ee9ng nh\u1eadn<\/strong>\n<ul>\n<li>Ch\u1ecdn SPD c\u00f3 ch\u1ee9ng nh\u1eadn UL ho\u1eb7c IEC t\u1eeb c\u00e1c c\u01a1 s\u1edf th\u1eed nghi\u1ec7m uy t\u00edn<\/li>\n<li>X\u00e1c minh tu\u00e2n th\u1ee7 c\u00e1c quy t\u1eafc \u0111i\u1ec7n \u0111\u1ecba ph\u01b0\u01a1ng<\/li>\n<\/ul>\n<\/li>\n<li><strong>Xem x\u00e9t hi\u1ec7u su\u1ea5t d\u00e0i h\u1ea1n<\/strong>\n<ul>\n<li>Ch\u1ecdn gi\u00e1 tr\u1ecb Uc v\u1edbi bi\u00ean \u0111\u1ed9 ph\u00f9 h\u1ee3p \u0111\u1ec3 t\u00ednh \u0111\u1ebfn s\u1ef1 l\u00e3o h\u00f3a<\/li>\n<li>Ch\u1ecdn x\u1ebfp h\u1ea1ng In cao h\u01a1n \u0111\u1ec3 k\u00e9o d\u00e0i tu\u1ed5i th\u1ecd SPD<\/li>\n<\/ul>\n<\/li>\n<li><strong>L\u1eadp k\u1ebf ho\u1ea1ch ph\u1ed1i h\u1ee3p<\/strong>\n<ul>\n<li>Nhi\u1ec1u thi\u1ebft b\u1ecb SPD ph\u1ea3i \u0111\u01b0\u1ee3c ph\u1ed1i h\u1ee3p theo Quy \u0111\u1ecbnh 534.4.4.5<\/li>\n<li>Xem x\u00e9t s\u1ef1 ph\u1ed1i h\u1ee3p n\u0103ng l\u01b0\u1ee3ng gi\u1eefa c\u00e1c c\u1ea5p b\u1ea3o v\u1ec7<\/li>\n<\/ul>\n<\/li>\n<li><strong>T\u00ednh \u0111\u1ebfn nh\u1eefng thay \u0111\u1ed5i trong t\u01b0\u01a1ng lai<\/strong>\n<ul>\n<li>Thi\u1ebft k\u1ebf cho c\u00e1c s\u1eeda \u0111\u1ed5i \u0111i\u1ec7n \u00e1p h\u1ec7 th\u1ed1ng ti\u1ec1m n\u0103ng<\/li>\n<li>Xem x\u00e9t n\u00e2ng c\u1ea5p thi\u1ebft b\u1ecb v\u00e0 thay \u0111\u1ed5i \u0111\u1ed9 nh\u1ea1y<\/li>\n<\/ul>\n<\/li>\n<\/ol>\n<blockquote><p><strong>\ud83d\udca1 Chuy\u00ean Gia M\u1eb9o:<\/strong> Vi\u1ec7c l\u1ef1a ch\u1ecdn x\u1ebfp h\u1ea1ng d\u00f2ng \u0111i\u1ec7n xung cao h\u01a1n kh\u00f4ng ph\u1ea3i l\u00fac n\u00e0o c\u0169ng mang l\u1ea1i kh\u1ea3 n\u0103ng b\u1ea3o v\u1ec7 t\u1ed1t h\u01a1n m\u00e0 ch\u1ec9 gi\u00fap k\u00e9o d\u00e0i tu\u1ed5i th\u1ecd c\u1ee7a SPD.<\/p><\/blockquote>\n<h2>Nh\u1eefng C\u00e2u H\u1ecfi Th\u01b0\u1eddng<\/h2>\n<h3>\u0110i\u1ec1u g\u00ec x\u1ea3y ra n\u1ebfu Uc qu\u00e1 th\u1ea5p so v\u1edbi h\u1ec7 th\u1ed1ng c\u1ee7a t\u00f4i?<\/h3>\n<p>N\u1ebfu Uc th\u1ea5p h\u01a1n \u0111i\u1ec7n \u00e1p ho\u1ea1t \u0111\u1ed9ng c\u1ee7a h\u1ec7 th\u1ed1ng, SPD s\u1ebd k\u00edch ho\u1ea1t li\u00ean t\u1ee5c, d\u1eabn \u0111\u1ebfn h\u1ecfng h\u00f3c ngay l\u1eadp t\u1ee9c v\u00e0 c\u00e1c nguy c\u01a1 ti\u1ec1m \u1ea9n v\u1ec1 an to\u00e0n. Lu\u00f4n \u0111\u1ea3m b\u1ea3o Uc v\u01b0\u1ee3t qu\u00e1 \u0111i\u1ec7n \u00e1p h\u1ec7 th\u1ed1ng d\u1ef1 ki\u1ebfn t\u1ed1i \u0111a.<\/p>\n<h3>T\u00f4i c\u00f3 th\u1ec3 s\u1eed d\u1ee5ng SPD c\u00f3 Up cao h\u01a1n \u0111\u1ecbnh m\u1ee9c thi\u1ebft b\u1ecb c\u1ee7a m\u00ecnh kh\u00f4ng?<\/h3>\n<p>Kh\u00f4ng, gi\u00e1 tr\u1ecb Up ph\u1ea3i th\u1ea5p h\u01a1n \u0111i\u1ec7n \u00e1p ch\u1ecbu xung c\u1ee7a thi\u1ebft b\u1ecb c\u1ee7a b\u1ea1n v\u1edbi \u00edt nh\u1ea5t bi\u00ean \u0111\u1ed9 an to\u00e0n 20% (Up \u2264 0,8 \u00d7 Uw). Gi\u00e1 tr\u1ecb Up cao h\u01a1n c\u00f3 th\u1ec3 cho ph\u00e9p \u0111i\u1ec7n \u00e1p g\u00e2y h\u1ea1i \u0111\u1ebfn thi\u1ebft b\u1ecb c\u1ee7a b\u1ea1n.<\/p>\n<h3>L\u00e0m c\u00e1ch n\u00e0o \u0111\u1ec3 x\u00e1c \u0111\u1ecbnh \u0111i\u1ec7n \u00e1p ch\u1ecbu xung c\u1ee7a thi\u1ebft b\u1ecb c\u1ee7a t\u00f4i?<\/h3>\n<p>Ki\u1ec3m tra th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt c\u1ee7a thi\u1ebft b\u1ecb \u0111\u1ec3 bi\u1ebft \u0111i\u1ec7n \u00e1p xung \u0111\u1ecbnh m\u1ee9c (Uw) ho\u1eb7c lo\u1ea1i qu\u00e1 \u0111i\u1ec7n \u00e1p. H\u1ea7u h\u1ebft c\u00e1c thi\u1ebft b\u1ecb nh\u1ea1y c\u1ea3m trong c\u00e1c c\u00f4ng tr\u00ecnh 230\/400V n\u00ean \u0111\u01b0\u1ee3c b\u1ea3o v\u1ec7 theo lo\u1ea1i qu\u00e1 \u0111i\u1ec7n \u00e1p II (2,5kV).<\/p>\n<h3>T\u00f4i c\u00f3 n\u00ean ch\u1ecdn gi\u00e1 tr\u1ecb Uc cao nh\u1ea5t c\u00f3 s\u1eb5n \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o an to\u00e0n t\u1ed1i \u0111a kh\u00f4ng?<\/h3>\n<p>Kh\u00f4ng, gi\u00e1 tr\u1ecb Uc l\u1edbn h\u01a1n kh\u00f4ng ph\u1ea3i l\u00fac n\u00e0o c\u0169ng t\u1ed1t h\u01a1n. Uc cao h\u01a1n d\u1eabn \u0111\u1ebfn \u0111i\u1ec7n \u00e1p kh\u1edfi \u0111\u1ed9ng v\u00e0 \u0111i\u1ec7n \u00e1p d\u01b0 cao h\u01a1n, c\u00f3 kh\u1ea3 n\u0103ng \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn hi\u1ec7u qu\u1ea3 b\u1ea3o v\u1ec7. Ch\u1ecdn Uc t\u1ed1i \u01b0u d\u1ef1a tr\u00ean y\u00eau c\u1ea7u h\u1ec7 th\u1ed1ng c\u1ee7a b\u1ea1n.<\/p>\n<h3>T\u1ea7n su\u1ea5t ki\u1ec3m tra SPD l\u00e0 bao l\u00e2u?<\/h3>\n<p>Ki\u1ec3m tra th\u01b0\u1eddng xuy\u00ean l\u00e0 \u0111i\u1ec1u c\u1ea7n thi\u1ebft, v\u1edbi c\u00e1c SPD c\u00f3 c\u00e1c ch\u1ec9 b\u00e1o kh\u00f4ng ho\u1ea1t \u0111\u1ed9ng c\u1ea7n \u0111\u01b0\u1ee3c thay th\u1ebf ngay l\u1eadp t\u1ee9c. L\u00ean l\u1ecbch ki\u1ec3m tra h\u00e0ng n\u0103m ho\u1eb7c sau c\u00e1c s\u1ef1 ki\u1ec7n xung \u0111i\u1ec7n \u0111\u00e1ng k\u1ec3.<\/p>\n<h3>S\u1ef1 kh\u00e1c bi\u1ec7t gi\u1eefa SPD lo\u1ea1i 1, lo\u1ea1i 2 v\u00e0 lo\u1ea1i 3 l\u00e0 g\u00ec?<\/h3>\n<p>SPD lo\u1ea1i 1 x\u1eed l\u00fd c\u00e1c cu\u1ed9c t\u1ea5n c\u00f4ng tr\u1ef1c ti\u1ebfp c\u1ee7a s\u00e9t (10\/350 \u00b5s), SPD lo\u1ea1i 2 cung c\u1ea5p b\u1ea3o v\u1ec7 l\u1eafp \u0111\u1eb7t ch\u00ednh (8\/20 \u00b5s) v\u00e0 SPD lo\u1ea1i 3 b\u1ea3o v\u1ec7 thi\u1ebft b\u1ecb ri\u00eang l\u1ebb g\u1ea7n t\u1ea3i.<\/p>\n<h2>K\u1ebft lu\u1eadn: L\u1ef1a ch\u1ecdn \u0111\u00fang \u0111\u1eafn<\/h2>\n<p>Hi\u1ec3u r\u00f5 c\u00e1c th\u00f4ng s\u1ed1 Uc v\u00e0 Up l\u00e0 r\u1ea5t quan tr\u1ecdng \u0111\u1ec3 b\u1ea3o v\u1ec7 ch\u1ed1ng s\u00e9t hi\u1ec7u qu\u1ea3. Gi\u00e1 tr\u1ecb Uc \u0111\u01b0\u1ee3c ch\u1ecdn \u0111\u00fang \u0111\u1ea3m b\u1ea3o SPD k\u00edch ho\u1ea1t ph\u00f9 h\u1ee3p trong c\u00e1c s\u1ef1 ki\u1ec7n \u0111\u1ed9t bi\u1ebfn \u0111i\u1ec7n \u00e1p, trong khi gi\u00e1 tr\u1ecb Up ch\u00ednh x\u00e1c \u0111\u1ea3m b\u1ea3o b\u1ea3o v\u1ec7 \u0111\u1ea7y \u0111\u1ee7 cho thi\u1ebft b\u1ecb.<\/p>\n<p><strong>C\u00e1c \u0111i\u1ec3m ch\u00ednh \u0111\u1ec3 l\u1ef1a ch\u1ecdn t\u1ed1i \u01b0u:<\/strong><\/p>\n<ul>\n<li>Ch\u1ecdn Uc v\u1edbi bi\u00ean an to\u00e0n \u0111\u1ea7y \u0111\u1ee7 so v\u1edbi \u0111i\u1ec7n \u00e1p h\u1ec7 th\u1ed1ng<\/li>\n<li>\u0110\u1ea3m b\u1ea3o Up lu\u00f4n th\u1ea5p h\u01a1n kh\u1ea3 n\u0103ng ch\u1ecbu \u0111\u1ef1ng c\u1ee7a thi\u1ebft b\u1ecb<\/li>\n<li>Xem x\u00e9t s\u01a1 \u0111\u1ed3 n\u1ed1i \u0111\u1ea5t h\u1ec7 th\u1ed1ng v\u00e0 c\u00e1c \u0111i\u1ec1u ki\u1ec7n s\u1ef1 c\u1ed1<\/li>\n<li>Tri\u1ec3n khai b\u1ea3o v\u1ec7 ph\u1ed1i h\u1ee3p tr\u00ean nhi\u1ec1u c\u1ea5p \u0111\u1ed9<\/li>\n<li>\u01afu ti\u00ean c\u00e1c SPD \u0111\u01b0\u1ee3c ch\u1ee9ng nh\u1eadn v\u1edbi vi\u1ec7c l\u1eafp \u0111\u1eb7t \u0111\u00fang c\u00e1ch<\/li>\n<\/ul>\n<p>\u0110\u1ed1i v\u1edbi c\u00e1c c\u00e0i \u0111\u1eb7t ph\u1ee9c t\u1ea1p ho\u1eb7c c\u00e1c \u1ee9ng d\u1ee5ng quan tr\u1ecdng, h\u00e3y tham kh\u1ea3o \u00fd ki\u1ebfn c\u1ee7a c\u00e1c k\u1ef9 s\u01b0 \u0111i\u1ec7n c\u00f3 tr\u00ecnh \u0111\u1ed9 \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o l\u1ef1a ch\u1ecdn SPD t\u1ed1i \u01b0u v\u00e0 b\u1ea3o v\u1ec7 h\u1ec7 th\u1ed1ng. \u0110\u1ea7u t\u01b0 v\u00e0o b\u1ea3o v\u1ec7 ch\u1ed1ng s\u00e9t lan truy\u1ec1n th\u00edch h\u1ee3p l\u1edbn h\u01a1n nhi\u1ec1u so v\u1edbi chi ph\u00ed thay th\u1ebf thi\u1ebft b\u1ecb b\u1ecb h\u01b0 h\u1ecfng v\u00e0 th\u1eddi gian ng\u1eebng ho\u1ea1t \u0111\u1ed9ng c\u1ee7a h\u1ec7 th\u1ed1ng.<\/p>\n<h2>Li\u00ean quan<\/h2>\n<p><a href=\"https:\/\/test.viox.com\/vi\/what-is-a-surge-protection-device\/\">Thi\u1ebft b\u1ecb ch\u1ed1ng s\u00e9t lan truy\u1ec1n (SPD) l\u00e0 g\u00ec?<\/a><\/p>\n<p><a href=\"https:\/\/test.viox.com\/vi\/how-surge-protection-devices-divert-and-limit-transient-voltages-for-safety-and-reliability\/\">SPD chuy\u1ec3n h\u01b0\u1edbng ho\u1eb7c gi\u1edbi h\u1ea1n \u0111i\u1ec7n \u00e1p tho\u00e1ng qua nh\u01b0 th\u1ebf n\u00e0o \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o an to\u00e0n v\u00e0 \u0111\u1ed9 tin c\u1eady<\/a><\/p>\n<p><a href=\"https:\/\/test.viox.com\/vi\/how-to-choose-the-right-spd-for-your-solar-power-system\/\">C\u00e1ch ch\u1ecdn SPD ph\u00f9 h\u1ee3p cho h\u1ec7 th\u1ed1ng \u0111i\u1ec7n m\u1eb7t tr\u1eddi c\u1ee7a b\u1ea1n<\/a><\/p>\n<p><a href=\"https:\/\/test.viox.com\/vi\/why-we-use-ac-in-home-not-dc\/\">T\u1ea1i sao ch\u00fang ta s\u1eed d\u1ee5ng AC trong nh\u00e0 thay v\u00ec DC<\/a><\/p>\n<p><a href=\"https:\/\/test.viox.com\/vi\/surge-protective-device-type-1-vs-type-2-vs-type-3\/\">Thi\u1ebft b\u1ecb ch\u1ed1ng s\u00e9t lan truy\u1ec1n Lo\u1ea1i 1 so v\u1edbi Lo\u1ea1i 2 so v\u1edbi Lo\u1ea1i 3<\/a><\/p>\n<\/div>","protected":false},"excerpt":{"rendered":"<p>Uc and Up are two critical voltage parameters that determine how effectively a Surge Protection Device (SPD) will protect your electrical equipment. Uc represents the maximum continuous operating voltage, while Up indicates the voltage protection level that limits surge voltage during activation. Understanding these parameters correctly ensures optimal surge protection and prevents costly equipment damage. [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":18718,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"inline_featured_image":false,"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"set","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"categories":[1],"tags":[],"class_list":["post-18696","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog"],"_links":{"self":[{"href":"https:\/\/test.viox.com\/vi\/wp-json\/wp\/v2\/posts\/18696","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/test.viox.com\/vi\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/test.viox.com\/vi\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/test.viox.com\/vi\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/test.viox.com\/vi\/wp-json\/wp\/v2\/comments?post=18696"}],"version-history":[{"count":0,"href":"https:\/\/test.viox.com\/vi\/wp-json\/wp\/v2\/posts\/18696\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/test.viox.com\/vi\/wp-json\/wp\/v2\/media\/18718"}],"wp:attachment":[{"href":"https:\/\/test.viox.com\/vi\/wp-json\/wp\/v2\/media?parent=18696"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/test.viox.com\/vi\/wp-json\/wp\/v2\/categories?post=18696"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/test.viox.com\/vi\/wp-json\/wp\/v2\/tags?post=18696"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}