{"id":23388,"date":"2026-04-05T15:15:36","date_gmt":"2026-04-05T07:15:36","guid":{"rendered":"https:\/\/viox.com\/?p=23388"},"modified":"2026-04-05T15:15:39","modified_gmt":"2026-04-05T07:15:39","slug":"how-to-read-dc-isolator-switch-ratings-voltage-current-poles-and-utilization-categories","status":"publish","type":"post","link":"https:\/\/test.viox.com\/vi\/how-to-read-dc-isolator-switch-ratings-voltage-current-poles-and-utilization-categories\/","title":{"rendered":"C\u00e1ch \u0111\u1ecdc th\u00f4ng s\u1ed1 \u0111\u1ecbnh m\u1ee9c c\u1ee7a c\u00f4ng t\u1eafc c\u00e1ch ly DC: \u0110i\u1ec7n \u00e1p, D\u00f2ng \u0111i\u1ec7n, S\u1ed1 c\u1ef1c v\u00e0 C\u00e1c h\u1ea1ng m\u1ee5c s\u1eed d\u1ee5ng"},"content":{"rendered":"<div class=\"product-intro\">\n<h2>Tr\u1ea3 l\u1eddi tr\u1ef1c ti\u1ebfp<\/h2>\n<p>\u0110\u1ecdc m\u1ed9t <a href=\"https:\/\/test.viox.com\/vi\/dc-isolator-switch\/\">c\u00f4ng t\u1eafc c\u00e1ch ly DC<\/a> nh\u00e3n m\u1ed9t c\u00e1ch ch\u00ednh x\u00e1c quy v\u1ec1 b\u1ed1n \u0111i\u1ec1u, \u0111\u01b0\u1ee3c ki\u1ec3m tra theo th\u1ee9 t\u1ef1 sau:<\/p>\n<ul>\n<li><strong>X\u1ebfp h\u1ea1ng \u0111i\u1ec7n \u00e1p<\/strong> \u2014 c\u00f4ng t\u1eafc c\u00f3 th\u1ec3 x\u1eed l\u00fd an to\u00e0n \u0111i\u1ec7n \u00e1p DC cao nh\u1ea5t trong h\u1ec7 th\u1ed1ng c\u1ee7a b\u1ea1n kh\u00f4ng?<\/li>\n<li><strong>X\u1ebfp h\u1ea1ng hi\u1ec7n t\u1ea1i<\/strong> \u2014 n\u00f3 c\u00f3 th\u1ec3 mang d\u00f2ng \u0111i\u1ec7n li\u00ean t\u1ee5c d\u1ef1 ki\u1ebfn m\u00e0 kh\u00f4ng b\u1ecb qu\u00e1 n\u00f3ng kh\u00f4ng?<\/li>\n<li><strong>C\u1ea5u h\u00ecnh c\u1ef1c<\/strong> \u2014 n\u00f3 ng\u1eaft bao nhi\u00eau d\u00e2y d\u1eabn c\u00f9ng m\u1ed9t l\u00fac?<\/li>\n<li><strong>Th\u1ec3 lo\u1ea1i s\u1eed d\u1ee5ng<\/strong> \u2014 lo\u1ea1i nhi\u1ec7m v\u1ee5 chuy\u1ec3n m\u1ea1ch DC n\u00e0o n\u00f3 th\u1ef1c s\u1ef1 \u0111\u00e3 \u0111\u01b0\u1ee3c ki\u1ec3m tra?<\/li>\n<\/ul>\n<figure style=\"text-align: center; margin: 20px 0;\"><img decoding=\"async\" style=\"max-width: 100%; height: auto;\" src=\"https:\/\/img.viox.com\/Engineer-inspecting-DC-isolator-switch-ratings-on-a-photovoltaic-installation.webp\" alt=\"Engineer inspecting DC isolator switch ratings on a photovoltaic installation\" \/><figcaption style=\"font-style: italic; color: #555; margin-top: 8px;\">M\u1ed9t k\u1ef9 s\u01b0 c\u1ea9n th\u1eadn ki\u1ec3m tra c\u00e1c th\u00f4ng s\u1ed1 tr\u00ean c\u00f4ng t\u1eafc c\u00e1ch ly DC t\u1ea1i m\u1ed9t h\u1ec7 th\u1ed1ng PV m\u1eb7t tr\u1eddi \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o an to\u00e0n v\u00e0 tu\u00e2n th\u1ee7 h\u1ec7 th\u1ed1ng.<\/figcaption><\/figure>\n<p>Th\u1ee9 t\u1ef1 r\u1ea5t quan tr\u1ecdng. Trong th\u1ef1c t\u1ebf, nh\u1eefng sai l\u1ea7m v\u1ec1 th\u00f4ng s\u1ed1 th\u01b0\u1eddng xuy\u00ean nh\u1ea5t x\u1ea3y ra khi ng\u01b0\u1eddi mua t\u1eadp trung v\u00e0o s\u1ed1 ampe tr\u01b0\u1edbc v\u00e0 b\u1ecf qua c\u1ea5p \u0111i\u1ec7n \u00e1p ho\u1eb7c lo\u1ea1i s\u1eed d\u1ee5ng. M\u1ed9t c\u00f4ng t\u1eafc c\u00e1ch ly 32 A kh\u00f4ng t\u1ef1 \u0111\u1ed9ng ph\u00f9 h\u1ee3p cho m\u1ecdi m\u1ea1ch DC 32 A, \u0111\u1eb7c bi\u1ec7t l\u00e0 trong c\u00e1c h\u1ec7 th\u1ed1ng PV m\u1eb7t tr\u1eddi, n\u01a1i Voc khi tr\u1eddi l\u1ea1nh, c\u00e1ch b\u1ed1 tr\u00ed c\u1ef1c v\u00e0 nhi\u1ec7m v\u1ee5 chuy\u1ec3n m\u1ea1ch DC c\u00f3 th\u1ec3 thay \u0111\u1ed5i ho\u00e0n to\u00e0n c\u00e2u tr\u1ea3 l\u1eddi.<\/p>\n<p>N\u1ebfu b\u1ea1n c\u1ea7n th\u00f4ng tin c\u01a1 b\u1ea3n v\u1ec1 thi\u1ebft b\u1ecb r\u1ed9ng h\u01a1n tr\u01b0\u1edbc, h\u00e3y b\u1eaft \u0111\u1ea7u v\u1edbi <a href=\"https:\/\/test.viox.com\/vi\/what-is-a-dc-isolator-switch\/\">C\u00f4ng t\u1eafc c\u00e1ch ly DC l\u00e0 g\u00ec?<\/a>. N\u1ebfu b\u1ea1n \u0111\u00e3 c\u00f3 nh\u00e3n, b\u1ea3ng d\u1eef li\u1ec7u ho\u1eb7c b\u1ea3ng th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt s\u1ea3n ph\u1ea9m tr\u01b0\u1edbc m\u1eb7t, h\u01b0\u1edbng d\u1eabn n\u00e0y s\u1ebd h\u01b0\u1edbng d\u1eabn b\u1ea1n \u00fd ngh\u0129a c\u1ee7a t\u1eebng d\u00f2ng v\u00e0 nh\u1eefng g\u00ec c\u1ea7n x\u00e1c minh ti\u1ebfp theo.<\/p>\n<h2>B\u1ea3ng tham kh\u1ea3o nhanh<\/h2>\n<table style=\"border-collapse: collapse; width: 100%; text-align: left; margin-bottom: 20px;\" border=\"1\" cellspacing=\"0\" cellpadding=\"8\">\n<thead>\n<tr>\n<th>M\u1ee5c th\u00f4ng s\u1ed1<\/th>\n<th>\u0110i\u1ec1u \u0111\u00f3 cho b\u1ea1n bi\u1ebft<\/th>\n<th>Sai l\u1ea7m ph\u1ed5 bi\u1ebfn<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td><strong>\u0110\u1ecbnh m\u1ee9c \u0111i\u1ec7n \u00e1p (Ue)<\/strong><\/td>\n<td>\u0110i\u1ec7n \u00e1p ho\u1ea1t \u0111\u1ed9ng DC t\u1ed1i \u0111a m\u00e0 c\u00f4ng t\u1eafc c\u00f3 th\u1ec3 x\u1eed l\u00fd theo nhi\u1ec7m v\u1ee5 \u0111\u00e3 n\u00eau c\u1ee7a n\u00f3<\/td>\n<td>Ch\u1ec9 kh\u1edbp v\u1edbi \u0111i\u1ec7n \u00e1p h\u1ec7 th\u1ed1ng danh \u0111\u1ecbnh v\u00e0 b\u1ecf qua Voc PV \u0111\u00e3 \u0111\u01b0\u1ee3c \u0111i\u1ec1u ch\u1ec9nh theo nhi\u1ec7t \u0111\u1ed9 l\u1ea1nh<\/td>\n<\/tr>\n<tr>\n<td><strong>Th\u00f4ng s\u1ed1 d\u00f2ng \u0111i\u1ec7n (Ie)<\/strong><\/td>\n<td>D\u00f2ng \u0111i\u1ec7n m\u00e0 c\u00f4ng t\u1eafc c\u00f3 th\u1ec3 mang theo theo nhi\u1ec7m v\u1ee5 \u0111\u01b0\u1ee3c ch\u1ec9 \u0111\u1ecbnh<\/td>\n<td>Gi\u1ea3 s\u1eed th\u00f4ng s\u1ed1 d\u00f2ng \u0111i\u1ec7n v\u1eabn gi\u1eef nguy\u00ean trong m\u1ecdi v\u1ecf b\u1ecdc v\u00e0 \u0111i\u1ec1u ki\u1ec7n nhi\u1ec7t \u0111\u1ed9<\/td>\n<\/tr>\n<tr>\n<td><strong>C\u1ef1c<\/strong><\/td>\n<td>S\u1ed1 l\u01b0\u1ee3ng d\u00e2y d\u1eabn b\u1ecb ng\u1eaft c\u00f9ng nhau<\/td>\n<td>Coi 2P v\u00e0 4P l\u00e0 c\u00f3 th\u1ec3 ho\u00e1n \u0111\u1ed5i cho nhau<\/td>\n<\/tr>\n<tr>\n<td><strong>Th\u1ec3 lo\u1ea1i s\u1eed d\u1ee5ng<\/strong><\/td>\n<td>Lo\u1ea1i nhi\u1ec7m v\u1ee5 chuy\u1ec3n m\u1ea1ch m\u00e0 thi\u1ebft b\u1ecb \u0111\u00e3 \u0111\u01b0\u1ee3c ki\u1ec3m tra<\/td>\n<td>B\u1ecf qua vi\u1ec7c c\u00f4ng t\u1eafc c\u00f3 \u0111\u01b0\u1ee3c \u0111\u00e1nh gi\u00e1 cho \u0111i\u1ec1u ki\u1ec7n t\u1ea3i DC th\u1ef1c t\u1ebf hay kh\u00f4ng<\/td>\n<\/tr>\n<tr>\n<td><strong>Ch\u1ee9ng nh\u1eadn ho\u1eb7c c\u01a1 s\u1edf ti\u00eau chu\u1ea9n<\/strong><\/td>\n<td>Th\u1ecb tr\u01b0\u1eddng v\u00e0 khu\u00f4n kh\u1ed5 th\u1eed nghi\u1ec7m n\u00e0o m\u00e0 thi\u1ebft b\u1ecb ph\u00f9 h\u1ee3p<\/td>\n<td>S\u1eed d\u1ee5ng c\u00e1c s\u1ea3n ph\u1ea9m \u0111\u01b0\u1ee3c \u0111\u00e1nh d\u1ea5u AC ho\u1eb7c m\u00f4 t\u1ea3 m\u01a1 h\u1ed3 trong \u1ee9ng d\u1ee5ng PV DC<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<figure style=\"text-align: center; margin: 20px 0;\"><img decoding=\"async\" style=\"max-width: 100%; height: auto;\" src=\"https:\/\/img.viox.com\/Technical-infographic-showing-how-to-read-ratings-on-a-photovoltaic-DC-isolator-switch.webp\" alt=\"Technical infographic showing how to read ratings on a photovoltaic DC isolator switch\" \/><figcaption style=\"font-style: italic; color: #555; margin-top: 8px;\">M\u1ed9t infographic k\u1ef9 thu\u1eadt chi ti\u1ebft c\u00e1c s\u1ed1 li\u1ec7u v\u00e0 th\u00f4ng s\u1ed1 ch\u00ednh c\u1ea7n t\u00ecm tr\u00ean nh\u00e3n c\u1ee7a c\u00f4ng t\u1eafc c\u00e1ch ly DC quang \u0111i\u1ec7n.<\/figcaption><\/figure>\n<h2>T\u1ea1i sao vi\u1ec7c \u0111\u1ecdc nh\u00e3n l\u1ea1i quan tr\u1ecdng h\u01a1n b\u1ea1n ngh\u0129<\/h2>\n<p>Nh\u00e3n c\u00f4ng t\u1eafc c\u00e1ch ly DC kh\u00f4ng ph\u1ea3i l\u00e0 trang tr\u00ed danh m\u1ee5c. \u0110\u00f3 l\u00e0 m\u1ed9t b\u1ea3n t\u00f3m t\u1eaft ng\u1eafn g\u1ecdn v\u1ec1 c\u00e1c \u0111i\u1ec1u ki\u1ec7n m\u00e0 thi\u1ebft b\u1ecb \u0111\u00e3 \u0111\u01b0\u1ee3c ch\u1ee9ng minh l\u00e0 ho\u1ea1t \u0111\u1ed9ng an to\u00e0n.<\/p>\n<p>\u0110i\u1ec1u n\u00e0y \u0111\u1eb7c bi\u1ec7t quan tr\u1ecdng trong PV m\u1eb7t tr\u1eddi v\u00ec:<\/p>\n<ul>\n<li>\u0111i\u1ec7n \u00e1p m\u1ea3ng thay \u0111\u1ed5i theo nhi\u1ec7t \u0111\u1ed9 v\u00e0 m\u1ed9t bu\u1ed5i s\u00e1ng l\u1ea1nh c\u00f3 th\u1ec3 \u0111\u1ea9y Voc l\u00ean cao h\u01a1n nhi\u1ec1u so v\u1edbi danh \u0111\u1ecbnh<\/li>\n<li>ph\u00eda DC v\u1eabn \u0111\u01b0\u1ee3c c\u1ea5p \u0111i\u1ec7n b\u1ea5t c\u1ee9 khi n\u00e0o c\u00f3 \u00e1nh s\u00e1ng ban ng\u00e0y<\/li>\n<li>H\u1ed3 quang DC ho\u1ea1t \u0111\u1ed9ng kh\u00e1c v\u1edbi h\u1ed3 quang AC, l\u00e0m cho c\u00e1c \u0111i\u1ec1u ki\u1ec7n chuy\u1ec3n m\u1ea1ch tr\u1edf n\u00ean kh\u1eaft khe h\u01a1n<\/li>\n<li>nh\u00e3n s\u1ea3n ph\u1ea9m c\u00f3 th\u1ec3 tr\u00f4ng t\u01b0\u01a1ng t\u1ef1 tr\u00ean b\u1ec1 m\u1eb7t trong khi gi\u1edbi h\u1ea1n \u1ee9ng d\u1ee5ng th\u1ef1c t\u1ebf kh\u00e1c nhau \u0111\u00e1ng k\u1ec3<\/li>\n<\/ul>\n<p>V\u1edbi \u00fd ngh\u0129 \u0111\u00f3, c\u00e1ch ti\u1ebfp c\u1eadn an to\u00e0n nh\u1ea5t l\u00e0 xem x\u00e9t t\u1eebng th\u00f4ng s\u1ed1 m\u1ed9t.<\/p>\n<h2>Th\u00f4ng s\u1ed1 \u0111i\u1ec7n \u00e1p: B\u1eaft \u0111\u1ea7u \u1edf \u0111\u00e2y tr\u01b0\u1edbc<\/h2>\n<p>S\u1ed1 \u0111\u1ea7u ti\u00ean c\u1ea7n ki\u1ec3m tra l\u00e0 \u0111i\u1ec7n \u00e1p DC \u0111\u1ecbnh m\u1ee9c, th\u01b0\u1eddng \u0111\u01b0\u1ee3c hi\u1ec3n th\u1ecb l\u00e0 <code>Ue<\/code> ho\u1eb7c \u0111\u01b0\u1ee3c li\u1ec7t k\u00ea l\u00e0 \u0111i\u1ec7n \u00e1p ho\u1ea1t \u0111\u1ed9ng DC t\u1ed1i \u0111a.<\/p>\n<h3>\u00dd ngh\u0129a c\u1ee7a th\u00f4ng s\u1ed1 \u0111i\u1ec7n \u00e1p<\/h3>\n<p>Th\u00f4ng s\u1ed1 \u0111i\u1ec7n \u00e1p cho b\u1ea1n bi\u1ebft \u0111i\u1ec7n \u00e1p h\u1ec7 th\u1ed1ng DC t\u1ed1i \u0111a m\u00e0 c\u00f4ng t\u1eafc c\u00e1ch ly c\u00f3 th\u1ec3 x\u1eed l\u00fd theo nhi\u1ec7m v\u1ee5 m\u00e0 n\u00f3 \u0111\u00e3 \u0111\u01b0\u1ee3c ki\u1ec3m tra. Trong c\u00f4ng vi\u1ec7c PV, \u0111i\u1ec1u n\u00e0y r\u1ea5t quan tr\u1ecdng v\u00ec thi\u1ebft b\u1ecb c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u1edf:<\/p>\n<ul>\n<li>600 VDC<\/li>\n<li>800 VDC<\/li>\n<li>1000 VDC<\/li>\n<li>1200 VDC<\/li>\n<li>ho\u1eb7c 1500 VDC, t\u00f9y thu\u1ed9c v\u00e0o ki\u1ebfn tr\u00fac l\u1eafp \u0111\u1eb7t<\/li>\n<\/ul>\n<h3>Sai l\u1ea7m ph\u1ed5 bi\u1ebfn nh\u1ea5t: s\u1eed d\u1ee5ng \u0111i\u1ec7n \u00e1p danh \u0111\u1ecbnh thay v\u00ec \u0111i\u1ec7n \u00e1p t\u1ed1i \u0111a \u0111\u00e3 \u0111\u01b0\u1ee3c \u0111i\u1ec1u ch\u1ec9nh<\/h3>\n<p>Trong c\u00e1c h\u1ec7 th\u1ed1ng m\u1eb7t tr\u1eddi, b\u1ea1n kh\u00f4ng ch\u1ecdn c\u00f4ng t\u1eafc c\u00e1ch ly ch\u1ec9 d\u1ef1a tr\u00ean nh\u00e3n h\u1ec7 th\u1ed1ng DC danh \u0111\u1ecbnh. B\u1ea1n c\u1ea7n \u0111i\u1ec7n \u00e1p h\u1edf m\u1ea1ch t\u1ed1i \u0111a, bao g\u1ed3m c\u1ea3 \u0111i\u1ec1u ch\u1ec9nh nhi\u1ec7t \u0111\u1ed9 l\u1ea1nh.<\/p>\n<p>H\u00e3y xem x\u00e9t k\u1ecbch b\u1ea3n n\u00e0y: m\u1ed9t chu\u1ed7i PV \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf cho \u201ch\u1ec7 th\u1ed1ng 1000 V\u201d, nh\u01b0ng v\u00e0o m\u1ed9t bu\u1ed5i s\u00e1ng m\u00f9a \u0111\u00f4ng l\u1ea1nh gi\u00e1, Voc th\u1ef1c t\u1ebf \u0111\u1ea1t 1050 V. N\u1ebfu c\u00f4ng t\u1eafc c\u00e1ch ly ch\u1ec9 \u0111\u01b0\u1ee3c \u0111\u1ecbnh m\u1ee9c cho 1000 VDC, th\u00ec n\u00f3 s\u1ebd b\u1ecb \u0111\u00e1nh gi\u00e1 th\u1ea5p, m\u1eb7c d\u00f9 m\u1ecdi th\u1ee9 tr\u00f4ng c\u00f3 v\u1ebb \u1ed5n tr\u00ean b\u1ea3ng b\u00e1o gi\u00e1.<\/p>\n<p>\u0110\u00e2y l\u00e0 m\u1ed9t l\u00fd do t\u1ea1i sao c\u00f4ng t\u1eafc c\u00e1ch ly DC trong c\u00e1c h\u1ec7 th\u1ed1ng PV n\u00ean \u0111\u01b0\u1ee3c xem x\u00e9t v\u1edbi c\u00f9ng k\u1ef7 lu\u1eadt k\u1ef9 thu\u1eadt nh\u01b0 c\u00e1c thi\u1ebft b\u1ecb DC r\u1ee7i ro cao kh\u00e1c.<\/p>\n<h3>V\u00ed d\u1ee5 ki\u1ec3m tra \u0111i\u1ec7n \u00e1p nhanh<\/h3>\n<table style=\"border-collapse: collapse; width: 100%; text-align: left; margin-bottom: 20px;\" border=\"1\" cellspacing=\"0\" cellpadding=\"8\">\n<thead>\n<tr>\n<th>K\u1ecbch b\u1ea3n<\/th>\n<th>Nh\u00e3n h\u1ec7 th\u1ed1ng<\/th>\n<th>Voc th\u1ef1c t\u1ebf v\u00e0o bu\u1ed5i s\u00e1ng l\u1ea1nh<\/th>\n<th>Ue t\u1ed1i thi\u1ec3u c\u1ea7n thi\u1ebft<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td><strong>PV tr\u00ean m\u00e1i nh\u00e0, kh\u00ed h\u1eadu \u00f4n h\u00f2a<\/strong><\/td>\n<td>1000 VDC<\/td>\n<td>1035 V<\/td>\n<td>\u00cdt nh\u1ea5t l\u00e0 tr\u00ean 1035 VDC, v\u1edbi bi\u00ean d\u1ef1 \u00e1n theo y\u00eau c\u1ea7u<\/td>\n<\/tr>\n<tr>\n<td><strong>PV quy m\u00f4 ti\u1ec7n \u00edch, khu v\u1ef1c l\u1ea1nh<\/strong><\/td>\n<td>1500 VDC<\/td>\n<td>1540 V<\/td>\n<td>Y\u00eau c\u1ea7u thi\u1ebft k\u1ebf chu\u1ed7i c\u1ea9n th\u1eadn ho\u1eb7c gi\u1ea3i ph\u00e1p \u0111i\u1ec7n \u00e1p cao h\u01a1n \u0111\u01b0\u1ee3c \u0111\u00e1nh gi\u00e1 ph\u00f9 h\u1ee3p<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>\u0110i\u1ec1u quan tr\u1ecdng l\u00e0 \u0111\u01a1n gi\u1ea3n: lu\u00f4n \u0111\u1ecbnh c\u1ee1 th\u00f4ng s\u1ed1 \u0111i\u1ec7n \u00e1p so v\u1edbi Voc \u0111\u00e3 \u0111\u01b0\u1ee3c \u0111i\u1ec1u ch\u1ec9nh trong tr\u01b0\u1eddng h\u1ee3p x\u1ea5u nh\u1ea5t, kh\u00f4ng ph\u1ea3i nh\u00e3n h\u1ec7 th\u1ed1ng.<\/p>\n<h2>Th\u00f4ng s\u1ed1 d\u00f2ng \u0111i\u1ec7n: Kh\u00f4ng ch\u1ec9 l\u00e0 m\u1ed9t s\u1ed1 Ampe<\/h2>\n<p>M\u1ee5c ti\u1ebfp theo l\u00e0 th\u00f4ng s\u1ed1 d\u00f2ng \u0111i\u1ec7n, th\u01b0\u1eddng \u0111\u01b0\u1ee3c hi\u1ec3n th\u1ecb l\u00e0 <code>Ie<\/code>.<\/p>\n<h3>\u00dd ngh\u0129a c\u1ee7a th\u00f4ng s\u1ed1 d\u00f2ng \u0111i\u1ec7n<\/h3>\n<p>\u0110\u1ecbnh m\u1ee9c d\u00f2ng \u0111i\u1ec7n cho b\u1ea1n bi\u1ebft l\u01b0\u1ee3ng d\u00f2ng \u0111i\u1ec7n m\u00e0 b\u1ed9 c\u00e1ch ly c\u00f3 th\u1ec3 mang li\u00ean t\u1ee5c trong c\u00e1c \u0111i\u1ec1u ki\u1ec7n \u0111\u01b0\u1ee3c x\u00e1c \u0111\u1ecbnh b\u1edfi ti\u00eau chu\u1ea9n s\u1ea3n ph\u1ea9m v\u00e0 nh\u00e0 s\u1ea3n xu\u1ea5t. Trong c\u00e1c d\u1ef1 \u00e1n th\u1ef1c t\u1ebf, con s\u1ed1 \u0111\u00f3 c\u1ea7n \u0111\u01b0\u1ee3c ki\u1ec3m tra so v\u1edbi:<\/p>\n<ul>\n<li>d\u00f2ng \u0111i\u1ec7n ho\u1ea1t \u0111\u1ed9ng d\u1ef1 ki\u1ebfn<\/li>\n<li>nhi\u1ec7t \u0111\u1ed9 m\u00f4i tr\u01b0\u1eddng t\u1ea1i v\u1ecb tr\u00ed l\u1eafp \u0111\u1eb7t<\/li>\n<li>\u0111\u1ed9 cao n\u1ebfu c\u00f3 li\u00ean quan<\/li>\n<li>\u1ea3nh h\u01b0\u1edfng c\u1ee7a nhi\u1ec7t \u0111\u1ed9 v\u1ecf t\u1ee7<\/li>\n<li>nh\u00f3m d\u00e2y d\u1eabn<\/li>\n<li>h\u01b0\u1edbng l\u1eafp \u0111\u1eb7t, n\u1ebfu \u0111\u01b0\u1ee3c nh\u00e0 s\u1ea3n xu\u1ea5t ch\u1ec9 \u0111\u1ecbnh<\/li>\n<\/ul>\n<h3>T\u1ea1i sao ch\u1ec9 \u0111\u1ecbnh m\u1ee9c d\u00f2ng \u0111i\u1ec7n kh\u00f4ng n\u00f3i l\u00ean to\u00e0n b\u1ed9 c\u00e2u chuy\u1ec7n<\/h3>\n<p>Hai b\u1ed9 c\u00e1ch ly \u0111\u1ec1u \u0111\u01b0\u1ee3c d\u00e1n nh\u00e3n <code>32 A<\/code> c\u00f3 th\u1ec3 kh\u00f4ng ph\u00f9 h\u1ee3p nh\u01b0 nhau trong m\u1ecdi t\u00ecnh hu\u1ed1ng.<\/p>\n<table style=\"border-collapse: collapse; width: 100%; text-align: left; margin-bottom: 20px;\" border=\"1\" cellspacing=\"0\" cellpadding=\"8\">\n<thead>\n<tr>\n<th>T\u1ed1<\/th>\n<th>B\u1ed9 c\u00e1ch ly A (32 A)<\/th>\n<th>B\u1ed9 c\u00e1ch ly B (32 A)<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td><strong>Lo\u1ea1i v\u1ecf t\u1ee7<\/strong><\/td>\n<td>T\u1ee7 trong nh\u00e0 th\u00f4ng gi\u00f3<\/td>\n<td>H\u1ed9p k\u1ebft h\u1ee3p PV k\u00edn ngo\u00e0i tr\u1eddi, nhi\u1ec7t \u0111\u1ed9 m\u00f4i tr\u01b0\u1eddng 55 \u00b0C<\/td>\n<\/tr>\n<tr>\n<td><strong>Th\u1ec3 lo\u1ea1i s\u1eed d\u1ee5ng<\/strong><\/td>\n<td>DC-21B<\/td>\n<td>DC-PV2<\/td>\n<\/tr>\n<tr>\n<td><strong>C\u1ea5u h\u00ecnh c\u1ef1c<\/strong><\/td>\n<td>2P<\/td>\n<td>4 P<\/td>\n<\/tr>\n<tr>\n<td><strong>T\u00ednh ph\u00f9 h\u1ee3p th\u1ef1c t\u1ebf cho chu\u1ed7i PV tr\u00ean m\u00e1i nh\u00e0 30 A<\/strong><\/td>\n<td>C\u00f3 th\u1ec3 c\u1ea7n gi\u1ea3m \u0111\u1ecbnh m\u1ee9c do nhi\u1ec7t \u0111\u1ed9<\/td>\n<td>C\u00f3 th\u1ec3 ph\u00f9 h\u1ee3p h\u01a1n, ch\u1edd xem x\u00e9t thi\u1ebft k\u1ebf \u0111\u1ea7y \u0111\u1ee7<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>V\u1ea5n \u0111\u1ec1 kh\u00f4ng ph\u1ea3i l\u00e0 c\u00e1i n\u00e0o lu\u00f4n t\u1ed1t h\u01a1n c\u00e1i n\u00e0o. V\u1ea5n \u0111\u1ec1 l\u00e0 d\u00f2ng \u0111i\u1ec7n ph\u1ea3i lu\u00f4n \u0111\u01b0\u1ee3c \u0111\u1ecdc c\u00f9ng v\u1edbi \u0111i\u1ec7n \u00e1p v\u00e0 lo\u1ea1i s\u1eed d\u1ee5ng, kh\u00f4ng ph\u1ea3i ri\u00eang l\u1ebb.<\/p>\n<h2>C\u1ef1c: 2P v\u00e0 4P Th\u1ef1c S\u1ef1 C\u00f3 Ngh\u0129a G\u00ec<\/h2>\n<p>C\u1ea5u h\u00ecnh c\u1ef1c cho b\u1ea1n bi\u1ebft s\u1ed1 l\u01b0\u1ee3ng d\u00e2y d\u1eabn m\u00e0 c\u00f4ng t\u1eafc m\u1edf c\u00f9ng m\u1ed9t l\u00fac.<\/p>\n<h3>B\u1ed9 c\u00e1ch ly 2 c\u1ef1c<\/h3>\n<p>M\u1ed9t <strong>2P<\/strong> B\u1ed9 c\u00e1ch ly DC th\u01b0\u1eddng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng khi m\u1ed9t d\u00e2y d\u1eabn d\u01b0\u01a1ng v\u00e0 m\u1ed9t d\u00e2y d\u1eabn \u00e2m \u0111\u01b0\u1ee3c ng\u1eaft k\u1ebft n\u1ed1i c\u00f9ng nhau cho m\u1ed9t chu\u1ed7i ho\u1eb7c m\u1ed9t m\u1ea1ch DC duy nh\u1ea5t.<\/p>\n<h3>B\u1ed9 c\u00e1ch ly 4 c\u1ef1c<\/h3>\n<p>M\u1ed9t <strong>4 P<\/strong> B\u1ed9 c\u00e1ch ly DC th\u01b0\u1eddng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong c\u00e1c \u1ee9ng d\u1ee5ng m\u00e0 hai chu\u1ed7i ho\u1eb7c m\u1ed9t c\u00e1ch b\u1ed1 tr\u00ed d\u00e2y d\u1eabn kh\u00e1c nhau \u0111ang \u0111\u01b0\u1ee3c ng\u1eaft k\u1ebft n\u1ed1i b\u1eb1ng m\u1ed9t thi\u1ebft b\u1ecb, ho\u1eb7c n\u01a1i \u0111\u01b0\u1eddng d\u1eabn chuy\u1ec3n m\u1ea1ch b\u00ean trong \u0111\u01b0\u1ee3c c\u1ea5u h\u00ecnh \u0111\u1ec3 qu\u1ea3n l\u00fd \u0111i\u1ec7n \u00e1p DC cao h\u01a1n b\u1eb1ng c\u00e1ch s\u1eed d\u1ee5ng c\u00e1c c\u1ef1c k\u1ebft n\u1ed1i n\u1ed1i ti\u1ebfp.<\/p>\n<h3>T\u1ea1i sao s\u1ed1 l\u01b0\u1ee3ng c\u1ef1c x\u1ee9ng \u0111\u00e1ng \u0111\u01b0\u1ee3c ch\u00fa \u00fd nhi\u1ec1u h\u01a1n so v\u1edbi th\u00f4ng th\u01b0\u1eddng<\/h3>\n<p>R\u1ea5t d\u1ec5 \u0111\u1ec3 ngh\u0129 v\u1ec1 c\u00e1c c\u1ef1c nh\u01b0 m\u1ed9t s\u1ef1 ti\u1ec7n l\u1ee3i \u0111\u01a1n gi\u1ea3n trong vi\u1ec7c \u0111i d\u00e2y. Trong th\u1ef1c t\u1ebf, s\u1ed1 l\u01b0\u1ee3ng c\u1ef1c c\u00f3 th\u1ec3 \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn:<\/p>\n<ul>\n<li>c\u00e1ch d\u00e2y d\u1eabn th\u1ef1c s\u1ef1 b\u1ecb ng\u1eaft<\/li>\n<li>\u0111i\u1ec7n \u00e1p s\u1eed d\u1ee5ng t\u1ed1i \u0111a, n\u01a1i c\u00e1c c\u1ef1c k\u1ebft n\u1ed1i n\u1ed1i ti\u1ebfp c\u00f3 th\u1ec3 m\u1edf r\u1ed9ng kh\u1ea3 n\u0103ng<\/li>\n<li>c\u1ea5u h\u00ecnh ti\u1ebfp \u0111i\u1ec3m b\u00ean trong<\/li>\n<li>ph\u01b0\u01a1ng ph\u00e1p \u0111i d\u00e2y \u0111\u01b0\u1ee3c ch\u1ea5p nh\u1eadn<\/li>\n<\/ul>\n<p>M\u1ed9t c\u00f4ng t\u1eafc 4 c\u1ef1c kh\u00f4ng \u0111\u01a1n gi\u1ea3n ch\u1ec9 l\u00e0 \u201cm\u1ed9t c\u00f4ng t\u1eafc 2 c\u1ef1c l\u1edbn h\u01a1n\u201d. S\u01a1 \u0111\u1ed3 k\u1ebft n\u1ed1i c\u1ee7a nh\u00e0 s\u1ea3n xu\u1ea5t v\u1eabn x\u00e1c \u0111\u1ecbnh c\u00e1ch c\u00e1c c\u1ef1c n\u00ean \u0111\u01b0\u1ee3c \u0111\u1ea5u d\u00e2y v\u00e0 l\u00e0m sai \u0111i\u1ec1u n\u00e0y c\u00f3 th\u1ec3 g\u00e2y ra c\u00e1c v\u1ea5n \u0111\u1ec1 v\u1ec1 an to\u00e0n.<\/p>\n<p>N\u1ebfu ph\u01b0\u01a1ng ph\u00e1p \u0111i d\u00e2y l\u00e0 c\u00e2u h\u1ecfi ch\u00ednh c\u1ee7a b\u1ea1n, th\u00ec trang li\u00ean quan ti\u1ebfp theo l\u00e0 <a href=\"https:\/\/test.viox.com\/vi\/connection-of-dc-isolators\/\">K\u1ebft n\u1ed1i b\u1ed9 c\u00e1ch ly DC<\/a>.<\/p>\n<h2>Lo\u1ea1i S\u1eed D\u1ee5ng: \u0110\u1ecbnh M\u1ee9c M\u00e0 H\u1ea7u H\u1ebft M\u1ecdi Ng\u01b0\u1eddi B\u1ecf Qua V\u00e0 Kh\u00f4ng N\u00ean<\/h2>\n<p>\u0110\u00e2y l\u00e0 m\u1ed9t trong nh\u1eefng d\u00f2ng quan tr\u1ecdng nh\u1ea5t tr\u00ean b\u1ea3ng th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt c\u1ee7a b\u1ed9 c\u00e1ch ly DC v\u00e0 l\u00e0 m\u1ed9t trong nh\u1eefng d\u00f2ng b\u1ecb b\u1ecf qua nhi\u1ec1u nh\u1ea5t.<\/p>\n<h3>Lo\u1ea1i s\u1eed d\u1ee5ng c\u00f3 ngh\u0129a l\u00e0 g\u00ec, b\u1eb1ng ng\u00f4n ng\u1eef \u0111\u01a1n gi\u1ea3n<\/h3>\n<p>H\u00e3y ngh\u0129 v\u1ec1 lo\u1ea1i s\u1eed d\u1ee5ng nh\u01b0 k\u1ecbch b\u1ea3n th\u1eed nghi\u1ec7m m\u00e0 c\u00f4ng t\u1eafc \u0111\u00e3 tr\u1ea3i qua tr\u01b0\u1edbc khi n\u00f3 \u0111\u01b0\u1ee3c ph\u00e9p mang nh\u00e3n \u0111\u00f3. Theo <strong>Ti\u00eau chu\u1ea9n IEC 60947-3<\/strong>, m\u1ecdi b\u1ed9 c\u00e1ch ly DC \u0111\u1ec1u \u0111\u01b0\u1ee3c ki\u1ec3m tra theo m\u1ed9t nhi\u1ec7m v\u1ee5 chuy\u1ec3n m\u1ea1ch c\u1ee5 th\u1ec3, c\u00f3 ngh\u0129a l\u00e0 m\u1ed9t s\u1ef1 k\u1ebft h\u1ee3p x\u00e1c \u0111\u1ecbnh gi\u1eefa \u0111i\u1ec7n \u00e1p, d\u00f2ng \u0111i\u1ec7n, lo\u1ea1i t\u1ea3i v\u00e0 s\u1ed1 l\u01b0\u1ee3ng thao t\u00e1c chuy\u1ec3n m\u1ea1ch.<\/p>\n<p>Lo\u1ea1i s\u1eed d\u1ee5ng \u0111\u01b0\u1ee3c in tr\u00ean nh\u00e3n cho b\u1ea1n bi\u1ebft k\u1ecbch b\u1ea3n th\u1eed nghi\u1ec7m n\u00e0o m\u00e0 c\u00f4ng t\u1eafc \u0111\u00e3 v\u01b0\u1ee3t qua. V\u1ec1 m\u1eb7t th\u1ef1c t\u1ebf, n\u00f3 tr\u1ea3 l\u1eddi:<\/p>\n<ul>\n<li>c\u00f4ng t\u1eafc n\u00e0y ch\u1ec9 \u0111\u01b0\u1ee3c ki\u1ec3m tra cho c\u00e1c t\u1ea3i \u0111i\u1ec7n tr\u1edf c\u01a1 b\u1ea3n, ho\u1ea1t \u0111\u1ed9ng t\u1ed1t?<\/li>\n<li>hay n\u00f3 \u0111\u00e3 \u0111\u01b0\u1ee3c ki\u1ec3m tra cho c\u00e1c \u0111i\u1ec1u ki\u1ec7n kh\u1eaft khe h\u01a1n li\u00ean quan \u0111\u1ebfn t\u1ea3i c\u1ea3m \u1ee9ng ho\u1eb7c h\u00e0nh vi c\u1ee5 th\u1ec3 c\u1ee7a quang \u0111i\u1ec7n?<\/li>\n<\/ul>\n<h3>C\u00e1c lo\u1ea1i DC chung: DC-21B v\u00e0 DC-22B<\/h3>\n<p>\u1ede m\u1ee9c \u0111\u1ed9 \u0111\u01a1n gi\u1ea3n:<\/p>\n<ul>\n<li><strong>DC-21B<\/strong> bao g\u1ed3m t\u1ea3i DC \u0111i\u1ec7n tr\u1edf ho\u1eb7c h\u01a1i c\u1ea3m \u1ee9ng<\/li>\n<li><strong>DC-22B<\/strong> bao g\u1ed3m c\u00e1c \u0111i\u1ec1u ki\u1ec7n chuy\u1ec3n m\u1ea1ch \u0111i\u1ec7n tr\u1edf v\u00e0 c\u1ea3m \u1ee9ng h\u1ed7n h\u1ee3p<\/li>\n<\/ul>\n<p>N\u1ebfu \u1ee9ng d\u1ee5ng c\u1ee7a b\u1ea1n li\u00ean quan \u0111\u1ebfn t\u1ea3i DC \u0111i\u1ec7n tr\u1edf \u0111\u01a1n gi\u1ea3n, DC-21B c\u00f3 th\u1ec3 l\u00e0 \u0111\u1ee7. \u0110\u1ed1i v\u1edbi c\u00e1c \u0111i\u1ec1u ki\u1ec7n t\u1ea3i h\u1ed7n h\u1ee3p kh\u1eaft khe h\u01a1n, DC-22B cung c\u1ea5p m\u1ed9t c\u01a1 s\u1edf v\u1eefng ch\u1eafc h\u01a1n.<\/p>\n<h3>C\u00e1c lo\u1ea1i c\u1ee5 th\u1ec3 cho PV: DC-PV1 v\u00e0 DC-PV2<\/h3>\n<p>Khi \u1ee9ng d\u1ee5ng c\u1ee5 th\u1ec3 l\u00e0 n\u0103ng l\u01b0\u1ee3ng m\u1eb7t tr\u1eddi PV, hai lo\u1ea1i b\u1ed5 sung tr\u1edf n\u00ean r\u1ea5t ph\u00f9 h\u1ee3p:<\/p>\n<ul>\n<li><strong>DC-PV1<\/strong> \u0111\u01b0\u1ee3c li\u00ean k\u1ebft v\u1edbi nhi\u1ec7m v\u1ee5 chuy\u1ec3n m\u1ea1ch PV ti\u00eau chu\u1ea9n, n\u01a1i c\u00e1c d\u00f2ng \u0111i\u1ec7n qu\u00e1 m\u1ee9c \u0111\u00e1ng k\u1ec3 kh\u00f4ng \u0111\u01b0\u1ee3c mong \u0111\u1ee3i s\u1ebd chi ph\u1ed1i s\u1ef1 ki\u1ec7n chuy\u1ec3n m\u1ea1ch<\/li>\n<li><strong>DC-PV2<\/strong> \u0111\u01b0\u1ee3c li\u00ean k\u1ebft v\u1edbi c\u00e1c \u0111i\u1ec1u ki\u1ec7n chuy\u1ec3n m\u1ea1ch quang \u0111i\u1ec7n kh\u1eaft khe h\u01a1n, bao g\u1ed3m c\u00e1c tr\u01b0\u1eddng h\u1ee3p c\u00f3 d\u00f2ng \u0111i\u1ec7n ng\u01b0\u1ee3c ho\u1eb7c c\u00e1c \u0111i\u1ec1u ki\u1ec7n qu\u00e1 d\u00f2ng nghi\u00eam tr\u1ecdng h\u01a1n c\u00f3 th\u1ec3 xu\u1ea5t hi\u1ec7n<\/li>\n<\/ul>\n<p>Trong nhi\u1ec1u d\u1ef1 \u00e1n PV tr\u00ean m\u00e1i nh\u00e0 v\u00e0 th\u01b0\u01a1ng m\u1ea1i, c\u00e1c nh\u00e0 thi\u1ebft k\u1ebf th\u00edch <strong>DC-PV2<\/strong> v\u00ec n\u00f3 ph\u00f9 h\u1ee3p h\u01a1n v\u1edbi c\u00e1c k\u1ecbch b\u1ea3n chuy\u1ec3n m\u1ea1ch quang \u0111i\u1ec7n kh\u1eaft khe h\u01a1n. Tuy nhi\u00ean, l\u1ef1a ch\u1ecdn cu\u1ed1i c\u00f9ng v\u1eabn n\u00ean tu\u00e2n theo ki\u1ebfn tr\u00fac d\u1ef1 \u00e1n th\u1ef1c t\u1ebf v\u00e0 nhi\u1ec7m v\u1ee5 chuy\u1ec3n m\u1ea1ch.<\/p>\n<h3>So s\u00e1nh th\u1ef1c t\u1ebf<\/h3>\n<table style=\"border-collapse: collapse; width: 100%; text-align: left; margin-bottom: 20px;\" border=\"1\" cellspacing=\"0\" cellpadding=\"8\">\n<thead>\n<tr>\n<th>\u1ee8ng d\u1ee5ng<\/th>\n<th>Lo\u1ea1i \u0111\u01b0\u1ee3c khuy\u1ebfn ngh\u1ecb t\u1ed1i thi\u1ec3u<\/th>\n<th>T\u1ea1i sao<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td><strong>T\u1ea3i \u0111i\u1ec7n tr\u1edf DC \u0111\u01a1n gi\u1ea3n, b\u1ea3ng \u0111i\u1ec1u khi\u1ec3n c\u00f4ng nghi\u1ec7p<\/strong><\/td>\n<td>DC-21B<\/td>\n<td>T\u1ea3i c\u00f3 th\u1ec3 d\u1ef1 \u0111o\u00e1n \u0111\u01b0\u1ee3c, kh\u00f4ng c\u00f3 h\u00e0nh vi c\u1ee5 th\u1ec3 c\u1ee7a PV<\/td>\n<\/tr>\n<tr>\n<td><strong>M\u1ea1ch \u0111\u1ed9ng c\u01a1 DC<\/strong><\/td>\n<td>DC-22B<\/td>\n<td>T\u1ea3i c\u1ea3m \u1ee9ng t\u1ea1o ra c\u00e1c \u0111i\u1ec1u ki\u1ec7n chuy\u1ec3n m\u1ea1ch kh\u1eaft khe h\u01a1n<\/td>\n<\/tr>\n<tr>\n<td><strong>B\u1ed9 c\u00e1ch ly chu\u1ed7i PV tr\u00ean m\u00e1i nh\u00e0<\/strong><\/td>\n<td>DC-PV1 ho\u1eb7c DC-PV2<\/td>\n<td>Nhi\u1ec7m v\u1ee5 c\u1ee5 th\u1ec3 cho PV; DC-PV2 th\u01b0\u1eddng \u0111\u01b0\u1ee3c \u01b0u ti\u00ean khi c\u00e1c \u0111i\u1ec1u ki\u1ec7n chuy\u1ec3n m\u1ea1ch kh\u1eaft khe h\u01a1n<\/td>\n<\/tr>\n<tr>\n<td><strong>PV quy m\u00f4 ti\u1ec7n \u00edch v\u1edbi c\u00e1c chu\u1ed7i song song<\/strong><\/td>\n<td>Th\u01b0\u1eddng l\u00e0 DC-PV2<\/td>\n<td>\u0110\u01b0\u1eddng d\u1eabn d\u00f2ng \u0111i\u1ec7n ng\u01b0\u1ee3c v\u00e0 n\u0103ng l\u01b0\u1ee3ng s\u1ef1 c\u1ed1 cao h\u01a1n th\u01b0\u1eddng bi\u1ec7n minh cho y\u00eau c\u1ea7u kh\u1eaft khe h\u01a1n \u0111\u1ed1i v\u1edbi \u1ee9ng d\u1ee5ng PV<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h3>T\u1ea1i sao \u0111i\u1ec1u n\u00e0y l\u1ea1i quan tr\u1ecdng khi b\u1ea1n so s\u00e1nh c\u00e1c s\u1ea3n ph\u1ea9m<\/h3>\n<p>Ng\u01b0\u1eddi mua c\u00f3 th\u1ec3 th\u1ea5y hai b\u1ed9 c\u00e1ch ly c\u1ea1nh nhau:<\/p>\n<ul>\n<li><strong>S\u1ea3n ph\u1ea9m X:<\/strong> <code>1000 VDC, 32 A, 4P, DC-21B<\/code><\/li>\n<li><strong>S\u1ea3n ph\u1ea9m Y:<\/strong> <code>1000 VDC, 32 A, 4P, DC-PV2<\/code><\/li>\n<\/ul>\n<p>\u0110i\u1ec7n \u00e1p, d\u00f2ng \u0111i\u1ec7n v\u00e0 s\u1ed1 c\u1ef1c l\u00e0 gi\u1ed1ng h\u1ec7t nhau. Nh\u01b0ng S\u1ea3n ph\u1ea9m X \u0111\u00e3 \u0111\u01b0\u1ee3c ki\u1ec3m tra cho \u1ee9ng d\u1ee5ng DC \u0111i\u1ec7n tr\u1edf th\u00f4ng th\u01b0\u1eddng, trong khi S\u1ea3n ph\u1ea9m Y \u0111\u00e3 \u0111\u01b0\u1ee3c ki\u1ec3m tra \u0111\u1eb7c bi\u1ec7t cho c\u00e1c \u0111i\u1ec1u ki\u1ec7n chuy\u1ec3n m\u1ea1ch quang \u0111i\u1ec7n. \u0110\u1ed1i v\u1edbi \u1ee9ng d\u1ee5ng PV, S\u1ea3n ph\u1ea9m Y th\u01b0\u1eddng l\u00e0 l\u1ef1a ch\u1ecdn ph\u00f9 h\u1ee3p h\u01a1n, m\u1eb7c d\u00f9 S\u1ea3n ph\u1ea9m X c\u00f3 v\u1ebb t\u01b0\u01a1ng \u0111\u01b0\u01a1ng ngay t\u1eeb c\u00e1i nh\u00ecn \u0111\u1ea7u ti\u00ean.<\/p>\n<p>H\u1ea1ng m\u1ee5c s\u1eed d\u1ee5ng th\u01b0\u1eddng l\u00e0 ranh gi\u1edbi ph\u00e2n bi\u1ec7t gi\u1eefa l\u1ef1a ch\u1ecdn k\u1ef9 thu\u1eadt h\u1ee3p l\u00fd v\u00e0 s\u1ef1 ph\u00f9 h\u1ee3p h\u1eddi h\u1ee3t tr\u00ean catalog.<\/p>\n<h2>C\u00e1ch \u0111\u1ecdc nh\u00e3n v\u00ed d\u1ee5 th\u1ef1c t\u1ebf<\/h2>\n<p>H\u00e3y t\u01b0\u1edfng t\u01b0\u1ee3ng b\u1ea1n \u0111ang xem m\u1ed9t b\u1ed9 c\u00e1ch ly DC \u0111\u01b0\u1ee3c \u0111\u00e1nh d\u1ea5u nh\u01b0 sau:<\/p>\n<p><code>1000 VDC, 32 A, 4P, IEC 60947-3, DC-PV2<\/code><\/p>\n<figure style=\"text-align: center; margin: 20px 0;\"><img decoding=\"async\" style=\"max-width: 100%; height: auto;\" src=\"https:\/\/img.viox.com\/Annotated-DC-isolator-switch-label-showing-how-to-identify-key-photovoltaic-ratings.webp\" alt=\"Annotated DC isolator switch label showing how to identify key photovoltaic ratings\" \/><figcaption style=\"font-style: italic; color: #555; margin-top: 8px;\">H\u01b0\u1edbng d\u1eabn ch\u00fa th\u00edch ph\u00e2n t\u00edch nh\u00e3n c\u00f4ng t\u1eafc c\u00e1ch ly DC th\u1ef1c t\u1ebf v\u00e0 c\u00e1c th\u00f4ng s\u1ed1 \u0111\u1ecbnh m\u1ee9c quang \u0111i\u1ec7n ch\u00ednh c\u1ee7a n\u00f3.<\/figcaption><\/figure>\n<p>\u0110\u00e2y l\u00e0 nh\u1eefng g\u00ec m\u1ed7i y\u1ebfu t\u1ed1 cho b\u1ea1n bi\u1ebft:<\/p>\n<ul>\n<li><code>1000 VDC<\/code> \u2014 c\u00f4ng t\u1eafc n\u00e0y \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf cho c\u00e1c h\u1ec7 th\u1ed1ng DC l\u00ean \u0111\u1ebfn 1000 V theo \u1ee9ng d\u1ee5ng \u0111\u00e3 n\u00eau<\/li>\n<li><code>32 A<\/code> \u2014 n\u00f3 c\u00f3 th\u1ec3 mang d\u00f2ng \u0111i\u1ec7n l\u00ean \u0111\u1ebfn 32 A li\u00ean t\u1ee5c trong c\u00e1c \u0111i\u1ec1u ki\u1ec7n x\u00e1c \u0111\u1ecbnh c\u1ee7a n\u00f3<\/li>\n<li><code>4 P<\/code> \u2014 n\u00f3 s\u1eed d\u1ee5ng b\u1ed1n c\u1ef1c, c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c y\u00eau c\u1ea7u b\u1edfi c\u00e1ch b\u1ed1 tr\u00ed chuy\u1ec3n m\u1ea1ch b\u00ean trong ho\u1eb7c ki\u1ebfn tr\u00fac m\u1ea1ch<\/li>\n<li><code>Ti\u00eau chu\u1ea9n IEC 60947-3<\/code> \u2014 c\u00f4ng t\u1eafc ph\u00f9 h\u1ee3p v\u1edbi ti\u00eau chu\u1ea9n c\u00f4ng t\u1eafc-b\u1ed9 ng\u1eaft k\u1ebft n\u1ed1i IEC c\u00f3 li\u00ean quan<\/li>\n<li><code>DC-PV2<\/code> \u2014 c\u00f4ng t\u1eafc \u0111\u00e3 \u0111\u01b0\u1ee3c ki\u1ec3m tra cho \u1ee9ng d\u1ee5ng chuy\u1ec3n m\u1ea1ch quang \u0111i\u1ec7n kh\u1eaft khe h\u01a1n<\/li>\n<\/ul>\n<h3>Theo d\u00f5i k\u1ef9 thu\u1eadt<\/h3>\n<p>\u0110\u1ecdc nh\u00e3n ch\u1ec9 l\u00e0 b\u01b0\u1edbc \u0111\u1ea7u ti\u00ean. C\u00e1c c\u00e2u h\u1ecfi theo d\u00f5i ch\u00ednh x\u00e1c l\u00e0:<\/p>\n<ul>\n<li>\u0111i\u1ec7n \u00e1p h\u1ec7 th\u1ed1ng t\u1ed1i \u0111a th\u1ef1c t\u1ebf c\u1ee7a t\u00f4i l\u00e0 bao nhi\u00eau, bao g\u1ed3m c\u1ea3 hi\u1ec7u ch\u1ec9nh nhi\u1ec7t \u0111\u1ed9 l\u1ea1nh?<\/li>\n<li>t\u00f4i \u0111ang ng\u1eaft k\u1ebft n\u1ed1i c\u00e1ch b\u1ed1 tr\u00ed d\u00e2y d\u1eabn n\u00e0o v\u00e0 c\u1ea5u h\u00ecnh c\u1ef1c c\u00f3 ph\u00f9 h\u1ee3p kh\u00f4ng?<\/li>\n<li>\u0111i\u1ec1u ki\u1ec7n t\u1ea3i th\u1ef1c t\u1ebf l\u00e0 g\u00ec: \u0111i\u1ec7n tr\u1edf, \u0111i\u1ec7n c\u1ea3m hay d\u00e0nh ri\u00eang cho PV?<\/li>\n<li>h\u1ea1ng m\u1ee5c s\u1eed d\u1ee5ng n\u00e0y c\u00f3 th\u1ef1c s\u1ef1 ph\u00f9 h\u1ee3p cho \u1ee9ng d\u1ee5ng chuy\u1ec3n m\u1ea1ch n\u00e0y kh\u00f4ng?<\/li>\n<\/ul>\n<h2>L\u01b0u \u0111\u1ed3 quy\u1ebft \u0111\u1ecbnh l\u1ef1a ch\u1ecdn th\u00f4ng s\u1ed1 \u0111\u1ecbnh m\u1ee9c<\/h2>\n<figure style=\"text-align: center; margin: 20px 0;\"><img decoding=\"async\" style=\"max-width: 100%; height: auto;\" src=\"https:\/\/img.viox.com\/Technical-decision-flowchart-for-selecting-a-DC-isolator-switch-based-on-voltage-current-poles-and-utilization-category.webp\" alt=\"Technical decision flowchart for selecting a DC isolator switch based on voltage current poles and utilization category\" \/><figcaption style=\"font-style: italic; color: #555; margin-top: 8px;\">L\u01b0u \u0111\u1ed3 quy\u1ebft \u0111\u1ecbnh k\u1ef9 thu\u1eadt \u0111\u1ec3 ch\u1ecdn c\u00f4ng t\u1eafc c\u00e1ch ly DC ph\u00f9 h\u1ee3p d\u1ef1a tr\u00ean \u0111i\u1ec7n \u00e1p, d\u00f2ng \u0111i\u1ec7n, s\u1ed1 c\u1ef1c v\u00e0 h\u1ea1ng m\u1ee5c s\u1eed d\u1ee5ng.<\/figcaption><\/figure>\n<p>Khi ch\u1ecdn b\u1ed9 c\u00e1ch ly DC, vi\u1ec7c xem x\u00e9t c\u00e1c th\u00f4ng s\u1ed1 \u0111\u1ecbnh m\u1ee9c theo tr\u00ecnh t\u1ef1 c\u00f3 c\u1ea5u tr\u00fac gi\u00fap tr\u00e1nh \u0111\u01b0\u1ee3c nh\u1eefng c\u1ea1m b\u1eaby ph\u1ed5 bi\u1ebfn nh\u1ea5t.<\/p>\n<h3>B\u01b0\u1edbc 1: X\u00e1c \u0111\u1ecbnh \u0111i\u1ec7n \u00e1p DC t\u1ed1i \u0111a c\u1ee7a b\u1ea1n<\/h3>\n<p>T\u00ednh to\u00e1n \u0111i\u1ec7n \u00e1p h\u1edf m\u1ea1ch tr\u01b0\u1eddng h\u1ee3p x\u1ea5u nh\u1ea5t cho h\u1ec7 th\u1ed1ng c\u1ee7a b\u1ea1n, bao g\u1ed3m c\u1ea3 hi\u1ec7u ch\u1ec9nh nhi\u1ec7t \u0111\u1ed9 l\u1ea1nh. Con s\u1ed1 n\u00e0y tr\u1edf th\u00e0nh y\u00eau c\u1ea7u \u0111i\u1ec7n \u00e1p t\u1ed1i thi\u1ec3u c\u1ee7a b\u1ea1n.<\/p>\n<h3>B\u01b0\u1edbc 2: X\u00e1c nh\u1eadn th\u00f4ng s\u1ed1 \u0111\u1ecbnh m\u1ee9c \u0111i\u1ec7n \u00e1p (Ue)<\/h3>\n<p>Ki\u1ec3m tra xem b\u1ed9 c\u00e1ch ly c\u00f3 \u0111\u00e1p \u1ee9ng ho\u1eb7c v\u01b0\u1ee3t qu\u00e1 con s\u1ed1 \u0111\u00f3 hay kh\u00f4ng. N\u1ebfu kh\u00f4ng, thi\u1ebft b\u1ecb s\u1ebd b\u1ecb lo\u1ea1i b\u1ea5t k\u1ec3 th\u00f4ng s\u1ed1 \u0111\u1ecbnh m\u1ee9c n\u00e0o kh\u00e1c.<\/p>\n<h3>B\u01b0\u1edbc 3: X\u00e1c minh th\u00f4ng s\u1ed1 \u0111\u1ecbnh m\u1ee9c d\u00f2ng \u0111i\u1ec7n (Ie)<\/h3>\n<p>Ki\u1ec3m tra d\u00f2ng \u0111i\u1ec7n ho\u1ea1t \u0111\u1ed9ng d\u1ef1 ki\u1ebfn, nhi\u1ec7t \u0111\u1ed9 m\u00f4i tr\u01b0\u1eddng, \u0111\u1ed9 cao, lo\u1ea1i v\u1ecf b\u1ecdc v\u00e0 b\u1ea5t k\u1ef3 h\u1ec7 s\u1ed1 gi\u1ea3m t\u1ea3i n\u00e0o do nh\u00e0 s\u1ea3n xu\u1ea5t ch\u1ec9 \u0111\u1ecbnh.<\/p>\n<h3>B\u01b0\u1edbc 4: Ki\u1ec3m tra c\u1ea5u h\u00ecnh c\u1ef1c<\/h3>\n<p>X\u00e1c nh\u1eadn r\u1eb1ng s\u1ed1 l\u01b0\u1ee3ng c\u1ef1c ph\u00f9 h\u1ee3p v\u1edbi ki\u1ebfn tr\u00fac m\u1ea1ch c\u1ee7a b\u1ea1n v\u00e0 s\u01a1 \u0111\u1ed3 \u0111\u1ea5u d\u00e2y \u0111\u01b0\u1ee3c nh\u00e0 s\u1ea3n xu\u1ea5t khuy\u1ebfn ngh\u1ecb.<\/p>\n<h3>B\u01b0\u1edbc 5: X\u00e1c minh h\u1ea1ng m\u1ee5c s\u1eed d\u1ee5ng<\/h3>\n<p>\u0110\u1ed1i v\u1edbi c\u00e1c \u1ee9ng d\u1ee5ng PV, h\u00e3y t\u00ecm DC-PV1 ho\u1eb7c DC-PV2. \u0110\u1ed1i v\u1edbi c\u00e1c \u1ee9ng d\u1ee5ng DC th\u00f4ng th\u01b0\u1eddng, h\u00e3y x\u00e1c nh\u1eadn r\u1eb1ng DC-21B ho\u1eb7c DC-22B ph\u00f9 h\u1ee3p v\u1edbi lo\u1ea1i t\u1ea3i. N\u1ebfu h\u1ea1ng m\u1ee5c s\u1eed d\u1ee5ng b\u1ecb thi\u1ebfu ho\u1eb7c kh\u00f4ng r\u00f5 r\u00e0ng, h\u00e3y coi \u0111\u00f3 l\u00e0 d\u1ea5u hi\u1ec7u c\u1ea3nh b\u00e1o.<\/p>\n<h3>B\u01b0\u1edbc 6: X\u00e1c nh\u1eadn ti\u00eau chu\u1ea9n v\u00e0 c\u01a1 s\u1edf ch\u1ee9ng nh\u1eadn<\/h3>\n<p>Thi\u1ebft b\u1ecb n\u00ean tham kh\u1ea3o <strong>Ti\u00eau chu\u1ea9n IEC 60947-3<\/strong> ho\u1eb7c m\u1ed9t c\u01a1 s\u1edf ti\u00eau chu\u1ea9n khu v\u1ef1c \u00e1p d\u1ee5ng kh\u00e1c, ch\u1eb3ng h\u1ea1n nh\u01b0 <strong>UL 98B<\/strong> trong b\u1ed1i c\u1ea3nh quang \u0111i\u1ec7n B\u1eafc M\u1ef9.<\/p>\n<p>N\u1ebfu thi\u1ebft b\u1ecb v\u01b0\u1ee3t qua c\u1ea3 s\u00e1u b\u01b0\u1edbc ki\u1ec3m tra, n\u00f3 c\u00f3 th\u1ec3 chuy\u1ec3n sang \u0111\u00e1nh gi\u00e1 k\u1ef9 thu\u1eadt chi ti\u1ebft. N\u1ebfu n\u00f3 kh\u00f4ng th\u00e0nh c\u00f4ng \u1edf b\u1ea5t k\u1ef3 b\u01b0\u1edbc n\u00e0o, h\u00e3y quay l\u1ea1i giai \u0111o\u1ea1n l\u1ef1a ch\u1ecdn s\u1ea3n ph\u1ea9m.<\/p>\n<h2>Nh\u1eefng sai l\u1ea7m th\u01b0\u1eddng g\u1eb7p khi \u0111\u1ecdc v\u00e0 c\u00e1ch tr\u00e1nh ch\u00fang<\/h2>\n<h3>Sai l\u1ea7m 1: Nh\u00ecn v\u00e0o d\u00f2ng \u0111i\u1ec7n tr\u01b0\u1edbc<\/h3>\n<p>\u0110\u00e2y l\u00e0 sai l\u1ea7m th\u01b0\u01a1ng m\u1ea1i ph\u1ed5 bi\u1ebfn nh\u1ea5t. M\u1ed9t <code>32 A<\/code> thi\u1ebft b\u1ecb \u0111\u01b0\u1ee3c ph\u00ea duy\u1ec7t cho m\u1ed9t d\u1ef1 \u00e1n ngay c\u1ea3 khi c\u1ea5p \u0111i\u1ec7n \u00e1p ho\u1eb7c \u1ee9ng d\u1ee5ng chuy\u1ec3n m\u1ea1ch kh\u00f4ng ph\u00f9 h\u1ee3p v\u1edbi h\u1ec7 th\u1ed1ng th\u1ef1c t\u1ebf.<\/p>\n<p><strong>L\u00e0m th\u1ebf n\u00e0o \u0111\u1ec3 tr\u00e1nh n\u00f3:<\/strong> lu\u00f4n b\u1eaft \u0111\u1ea7u v\u1edbi \u0111i\u1ec7n \u00e1p. D\u00f2ng \u0111i\u1ec7n r\u1ea5t quan tr\u1ecdng, nh\u01b0ng n\u00f3 ch\u1ec9 quan tr\u1ecdng sau khi x\u00e1c nh\u1eadn t\u00ednh ph\u00f9 h\u1ee3p v\u1ec1 \u0111i\u1ec7n \u00e1p.<\/p>\n<h3>Sai l\u1ea7m 2: B\u1ecf qua h\u1ea1ng m\u1ee5c s\u1eed d\u1ee5ng<\/h3>\n<p>M\u1ed9t c\u00f4ng t\u1eafc c\u00f3 d\u00f2ng \u0111i\u1ec7n v\u00e0 \u0111i\u1ec7n \u00e1p ph\u00f9 h\u1ee3p v\u1eabn c\u00f3 th\u1ec3 kh\u00f4ng ph\u00f9 h\u1ee3p n\u1ebfu h\u1ea1ng m\u1ee5c s\u1eed d\u1ee5ng kh\u00f4ng ph\u00f9 h\u1ee3p v\u1edbi \u1ee9ng d\u1ee5ng DC th\u1ef1c t\u1ebf.<\/p>\n<p><strong>L\u00e0m th\u1ebf n\u00e0o \u0111\u1ec3 tr\u00e1nh n\u00f3:<\/strong> h\u00e3y coi h\u1ea1ng m\u1ee5c s\u1eed d\u1ee5ng l\u00e0 ti\u00eau ch\u00ed l\u1ef1a ch\u1ecdn b\u1eaft bu\u1ed9c, kh\u00f4ng ph\u1ea3i l\u00e0 m\u1ed9t \u0111i\u1ec3m d\u1eef li\u1ec7u t\u00f9y ch\u1ecdn.<\/p>\n<h3>Sai l\u1ea7m 3: Cho r\u1eb1ng nhi\u1ec1u c\u1ef1c h\u01a1n t\u1ef1 \u0111\u1ed9ng c\u00f3 ngh\u0129a l\u00e0 t\u1ed1t h\u01a1n<\/h3>\n<p>Nhi\u1ec1u c\u1ef1c h\u01a1n kh\u00f4ng t\u1ef1 \u0111\u1ed9ng c\u00f3 ngh\u0129a l\u00e0 m\u1ed9t c\u00f4ng t\u1eafc an to\u00e0n h\u01a1n ho\u1eb7c c\u00f3 kh\u1ea3 n\u0103ng h\u01a1n. Ch\u00fang ch\u1ec9 ra m\u1ed9t c\u00e1ch b\u1ed1 tr\u00ed ng\u1eaft d\u00e2y d\u1eabn b\u00ean trong v\u00e0 b\u00ean ngo\u00e0i c\u1ee5 th\u1ec3.<\/p>\n<p><strong>L\u00e0m th\u1ebf n\u00e0o \u0111\u1ec3 tr\u00e1nh n\u00f3:<\/strong> lu\u00f4n tham kh\u1ea3o s\u01a1 \u0111\u1ed3 k\u1ebft n\u1ed1i c\u1ee7a nh\u00e0 s\u1ea3n xu\u1ea5t v\u00e0 x\u00e1c nh\u1eadn c\u00e1ch \u0111\u1ea5u d\u00e2y c\u00e1c c\u1ef1c cho c\u00e1ch b\u1ed1 tr\u00ed m\u1ea1ch c\u1ee5 th\u1ec3 c\u1ee7a b\u1ea1n.<\/p>\n<h3>Sai l\u1ea7m 4: Coi c\u00e1c d\u1ea5u hi\u1ec7u tr\u00f4ng gi\u1ed1ng AC l\u00e0 ch\u1ea5p nh\u1eadn \u0111\u01b0\u1ee3c \u0111\u1ed1i v\u1edbi DC<\/h3>\n<p>M\u1ed9t s\u1ed1 s\u1ea3n ph\u1ea9m mang c\u00e1c d\u1ea5u hi\u1ec7u c\u00f3 v\u1ebb chung chung ho\u1eb7c ch\u1ee7 y\u1ebfu li\u00ean quan \u0111\u1ebfn c\u00e1c \u1ee9ng d\u1ee5ng AC. N\u1ebfu thi\u1ebft b\u1ecb kh\u00f4ng \u0111\u01b0\u1ee3c \u0111\u00e1nh gi\u00e1 v\u00e0 x\u00e1c \u0111\u1ecbnh r\u00f5 r\u00e0ng cho \u1ee9ng d\u1ee5ng chuy\u1ec3n m\u1ea1ch DC, h\u00e3y ti\u1ebfn h\u00e0nh th\u1eadn tr\u1ecdng.<\/p>\n<p><strong>L\u00e0m th\u1ebf n\u00e0o \u0111\u1ec3 tr\u00e1nh n\u00f3:<\/strong> t\u00ecm c\u00e1c d\u1ea5u hi\u1ec7u \u0111i\u1ec7n \u00e1p DC r\u00f5 r\u00e0ng, h\u1ea1ng m\u1ee5c s\u1eed d\u1ee5ng DC v\u00e0 tham chi\u1ebfu \u0111\u1ebfn <strong>Ti\u00eau chu\u1ea9n IEC 60947-3<\/strong> ho\u1eb7c m\u1ed9t c\u01a1 s\u1edf ti\u00eau chu\u1ea9n li\u00ean quan \u0111\u1ebfn DC \u00e1p d\u1ee5ng kh\u00e1c.<\/p>\n<h2>C\u00e2u h\u1ecfi th\u01b0\u1eddng g\u1eb7p<\/h2>\n<h3>Gi\u00e1 tr\u1ecb \u0111\u1ecbnh m\u1ee9c \u0111\u1ea7u ti\u00ean t\u00f4i n\u00ean ki\u1ec3m tra tr\u00ean m\u1ed9t c\u00f4ng t\u1eafc c\u00e1ch ly DC l\u00e0 g\u00ec?<\/h3>\n<p>B\u1eaft \u0111\u1ea7u v\u1edbi th\u00f4ng s\u1ed1 \u0111i\u1ec7n \u00e1p \u0111\u1ecbnh m\u1ee9c, v\u00ec m\u1ed9t c\u00f4ng t\u1eafc c\u00f3 \u0111i\u1ec7n \u00e1p \u0111\u1ecbnh m\u1ee9c kh\u00f4ng ph\u00f9 h\u1ee3p v\u1edbi \u0111i\u1ec7n \u00e1p DC s\u1ebd b\u1ecb lo\u1ea1i ngay l\u1eadp t\u1ee9c b\u1ea5t k\u1ec3 d\u00f2ng \u0111i\u1ec7n \u0111\u1ecbnh m\u1ee9c c\u1ee7a n\u00f3. Trong c\u00e1c \u1ee9ng d\u1ee5ng PV, h\u00e3y ki\u1ec3m tra so v\u1edbi Voc t\u1ed1i \u0111a \u0111\u00e3 \u0111\u01b0\u1ee3c \u0111i\u1ec1u ch\u1ec9nh theo nhi\u1ec7t \u0111\u1ed9 l\u1ea1nh, kh\u00f4ng ch\u1ec9 \u0111i\u1ec7n \u00e1p h\u1ec7 th\u1ed1ng danh \u0111\u1ecbnh.<\/p>\n<h3>4P c\u00f3 ngh\u0129a l\u00e0 g\u00ec tr\u00ean m\u1ed9t c\u00f4ng t\u1eafc c\u00e1ch ly DC?<\/h3>\n<p>\u0110i\u1ec1u n\u00e0y c\u00f3 ngh\u0129a l\u00e0 c\u00f4ng t\u1eafc s\u1eed d\u1ee5ng b\u1ed1n c\u1ef1c \u0111\u1ec3 ng\u1eaft m\u1ea1ch. Trong c\u00e1c \u1ee9ng d\u1ee5ng DC, \u0111i\u1ec1u n\u00e0y th\u01b0\u1eddng \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn c\u00e1ch b\u1ed1 tr\u00ed d\u00e2y d\u1eabn v\u00e0 c\u1ea5u h\u00ecnh \u0111i\u1ec7n \u00e1p m\u00e0 c\u00f4ng t\u1eafc c\u00f3 th\u1ec3 h\u1ed7 tr\u1ee3.<\/p>\n<h3>DC-21B c\u00f3 ngh\u0129a l\u00e0 g\u00ec?<\/h3>\n<p>\u0110\u00e2y l\u00e0 m\u1ed9t h\u1ea1ng m\u1ee5c s\u1eed d\u1ee5ng IEC, cho bi\u1ebft nhi\u1ec7m v\u1ee5 \u0111\u00f3ng c\u1eaft m\u00e0 thi\u1ebft b\u1ecb \u0111\u00e3 \u0111\u01b0\u1ee3c th\u1eed nghi\u1ec7m. DC-21B t\u01b0\u01a1ng \u1ee9ng v\u1edbi t\u1ea3i DC thu\u1ea7n tr\u1edf ho\u1eb7c c\u00f3 t\u00ednh c\u1ea3m nh\u1eb9.<\/p>\n<h3>DC-PV1 v\u00e0 DC-PV2 c\u00f3 \u00fd ngh\u0129a g\u00ec tr\u00ean m\u1ed9t c\u00f4ng t\u1eafc c\u00e1ch ly n\u0103ng l\u01b0\u1ee3ng m\u1eb7t tr\u1eddi?<\/h3>\n<p>\u0110\u00e2y l\u00e0 c\u00e1c h\u1ea1ng m\u1ee5c s\u1eed d\u1ee5ng \u0111\u1eb7c tr\u01b0ng cho \u0111i\u1ec7n m\u1eb7t tr\u1eddi \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong ti\u00eau chu\u1ea9n IEC 60947-3. DC-PV1 bao g\u1ed3m nhi\u1ec7m v\u1ee5 chuy\u1ec3n m\u1ea1ch PV ti\u00eau chu\u1ea9n, trong khi DC-PV2 bao g\u1ed3m c\u00e1c \u0111i\u1ec1u ki\u1ec7n PV kh\u1eaft khe h\u01a1n, bao g\u1ed3m c\u00e1c t\u00ecnh hu\u1ed1ng d\u00f2ng \u0111i\u1ec7n ng\u01b0\u1ee3c.<\/p>\n<h3>D\u00f2ng \u0111\u1ecbnh m\u1ee9c c\u00f3 quan tr\u1ecdng h\u01a1n h\u1ea1ng m\u1ee5c s\u1eed d\u1ee5ng kh\u00f4ng?<\/h3>\n<p>S\u1ed1. D\u00f2ng \u0111\u1ecbnh m\u1ee9c cho bi\u1ebft c\u00f4ng t\u1eafc c\u00f3 th\u1ec3 ch\u1ecbu \u0111\u01b0\u1ee3c t\u1ea3i bao nhi\u00eau. C\u1ea5p \u0111\u1ed9 s\u1eed d\u1ee5ng cho bi\u1ebft lo\u1ea1i t\u1ea3i v\u00e0 \u0111i\u1ec1u ki\u1ec7n chuy\u1ec3n m\u1ea1ch m\u00e0 c\u00f4ng t\u1eafc \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf \u0111\u1ec3 x\u1eed l\u00fd.<\/p>\n<h3>T\u00f4i c\u00f3 th\u1ec3 ch\u1ec9 ch\u1ecdn thi\u1ebft b\u1ecb c\u00e1ch ly DC d\u1ef1a tr\u00ean ampe kh\u00f4ng?<\/h3>\n<p>Kh\u00f4ng. Vi\u1ec7c l\u1ef1a ch\u1ecdn ch\u00ednh x\u00e1c c\u00f2n ph\u1ee5 thu\u1ed9c v\u00e0o \u0111i\u1ec7n \u00e1p DC t\u1ed1i \u0111a, c\u1ea5u h\u00ecnh c\u1ef1c, h\u1ea1ng s\u1eed d\u1ee5ng v\u00e0 c\u00e1c \u0111i\u1ec1u ki\u1ec7n \u1ee9ng d\u1ee5ng c\u1ee5 th\u1ec3.<\/p>\n<h2>Ph\u1ea3i l\u00e0m g\u00ec ti\u1ebfp theo<\/h2>\n<p>B\u00e2y gi\u1edd b\u1ea1n \u0111\u00e3 hi\u1ec3u c\u00e1ch \u0111\u1ecdc c\u00e1c th\u00f4ng s\u1ed1 \u0111\u1ecbnh m\u1ee9c, b\u01b0\u1edbc ti\u1ebfp theo l\u00e0 \u00e1p d\u1ee5ng ch\u00fang v\u00e0o d\u1ef1 \u00e1n th\u1ef1c t\u1ebf c\u1ee7a b\u1ea1n.<\/p>\n<ul>\n<li>N\u1ebfu b\u1ea1n \u0111ang ch\u1ecdn m\u1ed9t b\u1ed9 c\u00e1ch ly cho m\u1ed9t d\u1ef1 \u00e1n c\u1ee5 th\u1ec3, h\u00e3y s\u1eed d\u1ee5ng quy tr\u00ecnh quy\u1ebft \u0111\u1ecbnh s\u00e1u b\u01b0\u1edbc \u1edf tr\u00ean \u0111\u1ec3 x\u00e1c minh t\u1eebng \u1ee9ng vi\u00ean so v\u1edbi c\u00e1c th\u00f4ng s\u1ed1 h\u1ec7 th\u1ed1ng th\u1ef1c t\u1ebf c\u1ee7a b\u1ea1n.<\/li>\n<li>N\u1ebfu b\u1ea1n c\u1ea7n tr\u1ee3 gi\u00fap v\u1ec1 ph\u00eda \u0111\u1ea5u d\u00e2y, h\u00e3y ti\u1ebfp t\u1ee5c \u0111\u1ebfn <a href=\"https:\/\/test.viox.com\/vi\/connection-of-dc-isolators\/\">K\u1ebft n\u1ed1i b\u1ed9 c\u00e1ch ly DC<\/a> \u0111\u1ec3 \u0111\u01b0\u1ee3c h\u01b0\u1edbng d\u1eabn \u0111\u1ea5u d\u00e2y t\u1eebng c\u1ef1c.<\/li>\n<li>N\u1ebfu b\u1ea1n mu\u1ed1n xem l\u1ea1i th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt c\u1ee7a b\u1ed9 c\u00e1ch ly DC VIOX, h\u00e3y truy c\u1eadp <a href=\"https:\/\/test.viox.com\/vi\/dc-isolator-switch\/\">Trang s\u1ea3n ph\u1ea9m C\u00f4ng t\u1eafc c\u00e1ch ly DC<\/a> \u0111\u1ec3 so s\u00e1nh d\u1eef li\u1ec7u v\u1ec1 \u0111i\u1ec7n \u00e1p, d\u00f2ng \u0111i\u1ec7n, s\u1ed1 c\u1ef1c v\u00e0 h\u1ea1ng m\u1ee5c s\u1eed d\u1ee5ng.<\/li>\n<li>N\u1ebfu b\u1ea1n c\u1ea7n c\u00e1c ki\u1ebfn th\u1ee9c c\u01a1 b\u1ea3n r\u1ed9ng h\u01a1n, h\u00e3y quay l\u1ea1i <a href=\"https:\/\/test.viox.com\/vi\/what-is-a-dc-isolator-switch\/\">C\u00f4ng t\u1eafc c\u00e1ch ly DC l\u00e0 g\u00ec?<\/a>.<\/li>\n<\/ul>\n<h2>C\u00e1c ngu\u1ed3n \u0111\u00e3 s\u1eed d\u1ee5ng<\/h2>\n<ul>\n<li><a href=\"https:\/\/webstore.iec.ch\/en\/publication\/59785\" rel=\"nofollow noopener\" target=\"_blank\">T\u1ed5ng quan v\u1ec1 IEC 60947-3:2020<\/a><\/li>\n<li><a href=\"https:\/\/www.shopulstandards.com\/ProductDetail.aspx?UniqueKey=30658\" rel=\"nofollow noopener\" target=\"_blank\">Tham kh\u1ea3o ti\u00eau chu\u1ea9n UL 98B<\/a><\/li>\n<li><a href=\"https:\/\/electrification.us.abb.com\/products\/switches-disconnects\/otdc-disconnects\" rel=\"nofollow noopener\" target=\"_blank\">Tham kh\u1ea3o b\u1ed9 ng\u1eaft k\u1ebft n\u1ed1i ABB OTDC hi\u1ec3n th\u1ecb x\u1ebfp h\u1ea1ng DC-PV2<\/a><\/li>\n<li><a href=\"https:\/\/www.socomec.be\/fr\/securiser-le-sectionnement-des-panneaux-photovoltaiques\" rel=\"nofollow noopener\" target=\"_blank\">H\u01b0\u1edbng d\u1eabn v\u1ec1 b\u1ed9 ng\u1eaft k\u1ebft n\u1ed1i quang \u0111i\u1ec7n Socomec th\u1ea3o lu\u1eadn v\u1ec1 DC-PV2<\/a><\/li>\n<\/ul>\n<\/div>\n<div class=\"simg-pop-btn\" style=\"top: 235.828px; left: 14px; display: none;\"><\/div>\n<div class=\"simg-pop-btn\" style=\"top: 235.828px; left: 14px; display: none;\"><\/div>","protected":false},"excerpt":{"rendered":"<p>Direct Answer Reading a DC isolator switch label correctly comes down to four things, checked in this order: Voltage rating \u2014 can the switch safely handle the highest DC voltage in your system? Current rating \u2014 can it carry the expected continuous current without overheating? Pole configuration \u2014 how many conductors does it disconnect at [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":23389,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"inline_featured_image":false,"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"set","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"categories":[1],"tags":[],"class_list":["post-23388","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\/23388","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=23388"}],"version-history":[{"count":1,"href":"https:\/\/test.viox.com\/vi\/wp-json\/wp\/v2\/posts\/23388\/revisions"}],"predecessor-version":[{"id":23390,"href":"https:\/\/test.viox.com\/vi\/wp-json\/wp\/v2\/posts\/23388\/revisions\/23390"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/test.viox.com\/vi\/wp-json\/wp\/v2\/media\/23389"}],"wp:attachment":[{"href":"https:\/\/test.viox.com\/vi\/wp-json\/wp\/v2\/media?parent=23388"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/test.viox.com\/vi\/wp-json\/wp\/v2\/categories?post=23388"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/test.viox.com\/vi\/wp-json\/wp\/v2\/tags?post=23388"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}