{"id":15085,"date":"2025-04-02T16:59:46","date_gmt":"2025-04-02T08:59:46","guid":{"rendered":"https:\/\/viox.com\/?p=15085"},"modified":"2026-04-03T14:08:57","modified_gmt":"2026-04-03T06:08:57","slug":"what-is-a-dc-isolator-switch","status":"publish","type":"post","link":"https:\/\/test.viox.com\/vi\/what-is-a-dc-isolator-switch\/","title":{"rendered":"C\u00f4ng t\u1eafc c\u00e1ch ly DC l\u00e0 g\u00ec"},"content":{"rendered":"<div class=\"product-intro\">\n<p>M\u1ed9t <a href=\"https:\/\/test.viox.com\/vi\/dc-isolator-switch\/\"><strong>c\u00f4ng t\u1eafc c\u00e1ch ly DC<\/strong><\/a> l\u00e0 m\u1ed9t thi\u1ebft b\u1ecb ng\u1eaft k\u1ebft n\u1ed1i v\u1eadn h\u00e0nh b\u1eb1ng tay \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong c\u00e1c h\u1ec7 th\u1ed1ng quang \u0111i\u1ec7n (PV) \u0111\u1ec3 c\u00e1ch ly an to\u00e0n ph\u00eda DC c\u1ee7a m\u1ed9t h\u1ec7 th\u1ed1ng l\u1eafp \u0111\u1eb7t cho m\u1ee5c \u0111\u00edch b\u1ea3o tr\u00ec, s\u1eeda ch\u1eefa, \u1ee9ng ph\u00f3 kh\u1ea9n c\u1ea5p v\u00e0 quy tr\u00ecnh t\u1eaft h\u1ec7 th\u1ed1ng. N\u00f3 t\u1ea1o ra m\u1ed9t \u0111i\u1ec3m ng\u1eaft k\u1ebft n\u1ed1i c\u00f3 ch\u1ee7 \u00fd, \u0111\u01b0\u1ee3c ch\u1ec9 \u0111\u1ecbnh r\u00f5 r\u00e0ng gi\u1eefa c\u00e1c t\u1ea5m pin m\u1eb7t tr\u1eddi v\u00e0 c\u00e1c thi\u1ebft b\u1ecb h\u1ea1 ngu\u1ed3n nh\u01b0 h\u1ed9p k\u1ebft h\u1ee3p, b\u1ed9 \u0111i\u1ec1u khi\u1ec3n s\u1ea1c v\u00e0 bi\u1ebfn t\u1ea7n.<\/p>\n<p>V\u1ec1 m\u1eb7t th\u1ef1c t\u1ebf, c\u00f4ng t\u1eafc c\u00e1ch ly DC l\u00e0 thi\u1ebft b\u1ecb cho ph\u00e9p k\u1ef9 thu\u1eadt vi\u00ean ch\u1ee7 \u0111\u1ed9ng d\u1eebng d\u00f2ng \u0111i\u1ec7n DC ch\u1ea3y qua h\u1ec7 th\u1ed1ng. N\u00f3 kh\u00f4ng ph\u1ea3i l\u00e0 <strong>kh\u00f4ng<\/strong> m\u1ed9t thi\u1ebft b\u1ecb b\u1ea3o v\u1ec7 qu\u00e1 d\u00f2ng, v\u00e0 n\u00f3 c\u0169ng kh\u00f4ng ph\u1ea3i l\u00e0 <strong>kh\u00f4ng<\/strong> ch\u1ec9 l\u00e0 m\u1ed9t ph\u1ee5 ki\u1ec7n b\u1eadt-t\u1eaft kh\u00e1c. C\u00f4ng vi\u1ec7c th\u1ef1c s\u1ef1 c\u1ee7a n\u00f3 l\u00e0 cung c\u1ea5p m\u1ed9t \u0111i\u1ec3m c\u00e1ch ly an to\u00e0n, c\u00f3 ch\u1ee7 \u00fd trong m\u1ed9t m\u1ea1ch v\u1eabn \u0111\u01b0\u1ee3c c\u1ea5p \u0111i\u1ec7n b\u1ea5t c\u1ee9 khi n\u00e0o c\u00f3 \u00e1nh s\u00e1ng m\u1eb7t tr\u1eddi.<\/p>\n<p>S\u1ef1 kh\u00e1c bi\u1ec7t \u0111\u00f3 r\u1ea5t quan tr\u1ecdng v\u00ec ph\u00eda DC c\u1ee7a m\u1ed9t h\u1ec7 th\u1ed1ng l\u1eafp \u0111\u1eb7t n\u0103ng l\u01b0\u1ee3ng m\u1eb7t tr\u1eddi ho\u1ea1t \u0111\u1ed9ng kh\u00e1c v\u1edbi c\u00e1c m\u1ea1ch AC th\u00f4ng th\u01b0\u1eddng trong t\u00f2a nh\u00e0. C\u00e1c m\u00f4-\u0111un n\u0103ng l\u01b0\u1ee3ng m\u1eb7t tr\u1eddi ti\u1ebfp t\u1ee5c t\u1ea1o ra \u0111i\u1ec7n \u00e1p v\u00e0o ban ng\u00e0y v\u00e0 h\u1ed3 quang DC kh\u00f3 ng\u1eaft h\u01a1n h\u1ed3 quang AC v\u00ec ch\u00fang kh\u00f4ng \u0111\u01b0\u1ee3c h\u01b0\u1edfng l\u1ee3i t\u1eeb vi\u1ec7c d\u00f2ng \u0111i\u1ec7n t\u1ef1 nhi\u00ean \u0111i qua \u0111i\u1ec3m kh\u00f4ng. \u0110\u00e2y l\u00e0 l\u00fd do t\u1ea1i sao vi\u1ec7c l\u1ef1a ch\u1ecdn, v\u1ecb tr\u00ed v\u00e0 \u0111\u1ecbnh m\u1ee9c \u0111i\u1ec7n \u00e1p c\u1ee7a b\u1ed9 c\u00e1ch ly l\u1ea1i quan tr\u1ecdng \u0111\u1ebfn v\u1eady trong thi\u1ebft k\u1ebf h\u1ec7 th\u1ed1ng PV.<\/p>\n<figure style=\"text-align: center; margin: 20px 0;\"><img decoding=\"async\" style=\"max-width: 100%; height: auto;\" src=\"https:\/\/img.viox.com\/DC-solar-isolator-switch-installed-near-a-photovoltaic-inverter-for-safe-maintenance-isolation.webp\" alt=\"DC solar isolator switch installed near a photovoltaic inverter for safe maintenance isolation\" \/><figcaption style=\"font-style: italic; color: #555; margin-top: 10px; font-size: 0.9em;\">M\u1ed9t c\u00f4ng t\u1eafc c\u00e1ch ly n\u0103ng l\u01b0\u1ee3ng m\u1eb7t tr\u1eddi DC \u0111\u00e1ng tin c\u1eady \u0111\u01b0\u1ee3c l\u1eafp \u0111\u1eb7t an to\u00e0n g\u1ea7n m\u1ed9t bi\u1ebfn t\u1ea7n quang \u0111i\u1ec7n, \u0111\u00f3ng vai tr\u00f2 l\u00e0 m\u1ed9t \u0111i\u1ec3m ng\u1eaft k\u1ebft n\u1ed1i th\u1ee7 c\u00f4ng quan tr\u1ecdng \u0111\u1ec3 b\u1ea3o tr\u00ec an to\u00e0n v\u00e0 c\u00e1ch ly h\u1ec7 th\u1ed1ng.<\/figcaption><\/figure>\n<h2>Nh\u1eefng \u0111i\u1ec3m ch\u00ednh<\/h2>\n<ul>\n<li>C\u00f4ng t\u1eafc c\u00e1ch ly DC ch\u1ee7 y\u1ebfu \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng cho <strong>c\u00e1ch ly th\u1ee7 c\u00f4ng<\/strong>, kh\u00f4ng ph\u1ea3i b\u1ea3o v\u1ec7 l\u1ed7i t\u1ef1 \u0111\u1ed9ng.<\/li>\n<li>Vai tr\u00f2 quan tr\u1ecdng nh\u1ea5t c\u1ee7a n\u00f3 l\u00e0 t\u1ea1o ra m\u1ed9t \u0111i\u1ec3m ng\u1eaft k\u1ebft n\u1ed1i \u0111\u00e3 \u0111\u01b0\u1ee3c x\u00e1c minh gi\u1eefa m\u1ea3ng PV v\u00e0 c\u00e1c thi\u1ebft b\u1ecb h\u1ea1 ngu\u1ed3n nh\u01b0 h\u1ed9p k\u1ebft h\u1ee3p v\u00e0 bi\u1ebfn t\u1ea7n.<\/li>\n<li>Trong c\u00e1c h\u1ec7 th\u1ed1ng PV n\u0103ng l\u01b0\u1ee3ng m\u1eb7t tr\u1eddi, v\u1ecb tr\u00ed l\u1eafp \u0111\u1eb7t c\u0169ng quan tr\u1ecdng nh\u01b0 vi\u1ec7c l\u1ef1a ch\u1ecdn thi\u1ebft b\u1ecb. V\u1ecb tr\u00ed b\u1ea1n l\u1eafp \u0111\u1eb7t b\u1ed9 c\u00e1ch ly \u1ea3nh h\u01b0\u1edfng tr\u1ef1c ti\u1ebfp \u0111\u1ebfn an to\u00e0n b\u1ea3o tr\u00ec v\u00e0 tu\u00e2n th\u1ee7 quy \u0111\u1ecbnh.<\/li>\n<li>M\u1ed9t c\u00f4ng t\u1eafc c\u00e1ch ly DC ph\u1ea3i \u0111\u01b0\u1ee3c ch\u1ecdn cho <strong>\u0111i\u1ec7n \u00e1p, d\u00f2ng \u0111i\u1ec7n v\u00e0 kh\u1ea3 n\u0103ng chuy\u1ec3n m\u1ea1ch DC th\u1ef1c t\u1ebf c\u1ee7a PV<\/strong>, kh\u00f4ng ph\u1ea3i do s\u1ef1 t\u01b0\u01a1ng \u0111\u1ed3ng b\u1ec1 ngo\u00e0i v\u1edbi m\u1ed9t thi\u1ebft b\u1ecb ng\u1eaft k\u1ebft n\u1ed1i AC.<\/li>\n<li>Trong h\u1ea7u h\u1ebft c\u00e1c h\u1ec7 th\u1ed1ng l\u1eafp \u0111\u1eb7t n\u0103ng l\u01b0\u1ee3ng m\u1eb7t tr\u1eddi \u0111a chu\u1ed7i, c\u00f4ng t\u1eafc c\u00e1ch ly DC ho\u1ea1t \u0111\u1ed9ng c\u00f9ng v\u1edbi c\u1ea7u dao ho\u1eb7c c\u1ea7u ch\u00ec thay v\u00ec thay th\u1ebf ch\u00fang.<\/li>\n<\/ul>\n<h2>C\u00f4ng t\u1eafc c\u00e1ch ly DC l\u00e0m g\u00ec? C\u00e2u tr\u1ea3 l\u1eddi tr\u1ef1c ti\u1ebfp<\/h2>\n<p>M\u1ed9t c\u00f4ng t\u1eafc c\u00e1ch ly DC th\u1ef1c hi\u1ec7n ba ch\u1ee9c n\u0103ng c\u1ed1t l\u00f5i trong m\u1ed9t h\u1ec7 th\u1ed1ng PV n\u0103ng l\u01b0\u1ee3ng m\u1eb7t tr\u1eddi:<\/p>\n<ol>\n<li><strong>Cung c\u1ea5p m\u1ed9t ph\u01b0\u01a1ng ti\u1ec7n ng\u1eaft k\u1ebft n\u1ed1i th\u1ee7 c\u00f4ng<\/strong> \u1edf ph\u00eda DC c\u1ee7a PV \u0111\u1ec3 k\u1ef9 thu\u1eadt vi\u00ean c\u00f3 th\u1ec3 ng\u1eaft \u0111i\u1ec7n an to\u00e0n cho thi\u1ebft b\u1ecb tr\u01b0\u1edbc khi l\u00e0m vi\u1ec7c tr\u00ean \u0111\u00f3.<\/li>\n<li><strong>H\u1ed7 tr\u1ee3 c\u00e1c quy tr\u00ecnh b\u1ea3o tr\u00ec v\u00e0 t\u1eaft h\u1ec7 th\u1ed1ng an to\u00e0n<\/strong> b\u1eb1ng c\u00e1ch t\u1ea1o ra m\u1ed9t tr\u1ea1ng th\u00e1i m\u1edf \u0111\u01b0\u1ee3c ch\u1ec9 \u0111\u1ecbnh r\u00f5 r\u00e0ng v\u00e0 \u0111\u00e3 \u0111\u01b0\u1ee3c x\u00e1c minh, ch\u1ee9ng minh r\u1eb1ng m\u1ea1ch \u0111\u00e3 \u0111\u01b0\u1ee3c c\u00e1ch ly c\u00f3 ch\u1ee7 \u00fd.<\/li>\n<li><strong>T\u00e1ch m\u1ea3ng PV kh\u1ecfi c\u00e1c thi\u1ebft b\u1ecb h\u1ea1 ngu\u1ed3n<\/strong> nh\u01b0 h\u1ed9p k\u1ebft h\u1ee3p, b\u1ed9 \u0111i\u1ec1u khi\u1ec3n s\u1ea1c ho\u1eb7c bi\u1ebfn t\u1ea7n trong qu\u00e1 tr\u00ecnh b\u1ea3o tr\u00ec, ki\u1ec3m tra ho\u1eb7c \u1ee9ng ph\u00f3 kh\u1ea9n c\u1ea5p.<\/li>\n<\/ol>\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-the-main-functions-of-a-DC-solar-isolator-switch.webp\" alt=\"Technical infographic showing the main functions of a DC solar isolator switch\" \/><figcaption style=\"font-style: italic; color: #555; margin-top: 10px; font-size: 0.9em;\">H\u00ecnh \u1ea3nh k\u1ef9 thu\u1eadt minh h\u1ecda c\u00e1c ch\u1ee9c n\u0103ng ch\u00ednh c\u1ee7a m\u1ed9t c\u00f4ng t\u1eafc c\u00e1ch ly n\u0103ng l\u01b0\u1ee3ng m\u1eb7t tr\u1eddi DC, l\u00e0m n\u1ed5i b\u1eadt vai tr\u00f2 c\u1ee7a n\u00f3 trong vi\u1ec7c ng\u1eaft k\u1ebft n\u1ed1i th\u1ee7 c\u00f4ng, c\u00e1ch ly b\u1ea3o tr\u00ec an to\u00e0n v\u00e0 t\u00e1ch m\u1ea3ng PV.<\/figcaption><\/figure>\n<p>V\u1ec1 m\u1eb7t quy \u0111\u1ecbnh, \u0111i\u1ec1u n\u00e0y thu\u1ed9c y\u00eau c\u1ea7u r\u1ed9ng h\u01a1n \u0111\u1ed1i v\u1edbi m\u1ed9t <strong>ph\u01b0\u01a1ng ti\u1ec7n ng\u1eaft k\u1ebft n\u1ed1i<\/strong> trong c\u00e1c h\u1ec7 th\u1ed1ng quang \u0111i\u1ec7n. Trong c\u00e1c d\u1ef1 \u00e1n d\u1ef1a tr\u00ean NEC, y\u00eau c\u1ea7u n\u00e0y n\u1eb1m trong <strong>\u0110i\u1ec1u 690.13 c\u1ee7a NEC \u2014 Ph\u01b0\u01a1ng ti\u1ec7n ng\u1eaft k\u1ebft n\u1ed1i h\u1ec7 th\u1ed1ng quang \u0111i\u1ec7n<\/strong>. Trong th\u1ef1c t\u1ebf d\u1ef1a tr\u00ean IEC v\u00e0 AS\/NZS, kh\u00e1i ni\u1ec7m t\u01b0\u01a1ng t\u1ef1 xu\u1ea5t hi\u1ec7n trong c\u00e1c quy t\u1eafc c\u00e1ch ly PV chi ph\u1ed1i vi\u1ec7c ng\u1eaft k\u1ebft n\u1ed1i ph\u00eda m\u1ea3ng v\u00e0 ph\u00eda bi\u1ebfn t\u1ea7n theo <strong>Ti\u00eau chu\u1ea9n IEC 60364-7-712<\/strong> v\u00e0 <strong>Ti\u00eau chu\u1ea9n AS\/NZS 5033<\/strong>.<\/p>\n<p>S\u1ef1 kh\u00e1c bi\u1ec7t quan tr\u1ecdng l\u00e0 m\u1ed9t c\u00f4ng t\u1eafc c\u00e1ch ly DC l\u00e0 m\u1ed9t thi\u1ebft b\u1ecb \u0111\u01b0\u1ee3c ch\u1ecdn cho <strong>nhi\u1ec7m v\u1ee5 c\u00e1ch ly<\/strong>, kh\u00f4ng ph\u1ea3i b\u1ea3o v\u1ec7 qu\u00e1 d\u00f2ng. Vi\u1ec7c s\u1eed d\u1ee5ng an to\u00e0n c\u1ee7a n\u00f3 v\u1eabn ph\u1ee5 thu\u1ed9c v\u00e0o \u0111\u1ecbnh m\u1ee9c c\u1ee7a c\u00f4ng t\u1eafc-b\u1ed9 ng\u1eaft k\u1ebft n\u1ed1i th\u1ef1c t\u1ebf, lo\u1ea1i s\u1eed d\u1ee5ng DC v\u00e0 quy tr\u00ecnh t\u1eaft d\u1ef1 \u00e1n.<\/p>\n<h2>\u0110i\u1ec1u g\u00ec l\u00e0m cho c\u00f4ng t\u1eafc c\u00e1ch ly DC kh\u00e1c v\u1edbi c\u00f4ng t\u1eafc AC?<\/h2>\n<p>M\u1ed9t c\u00f4ng t\u1eafc c\u00e1ch ly DC PV kh\u00f4ng ch\u1ec9 \u0111\u01a1n gi\u1ea3n l\u00e0 m\u1ed9t c\u00f4ng t\u1eafc AC gia d\u1ee5ng ho\u1eb7c c\u00f4ng nghi\u1ec7p \u0111\u01b0\u1ee3c \u00e1p d\u1ee5ng cho \u0111i\u1ec7n \u00e1p cao h\u01a1n. N\u00f3 ph\u1ea3i x\u1eed l\u00fd c\u00e1c th\u1ef1c t\u1ebf \u0111i\u1ec7n c\u1ee5 th\u1ec3 c\u1ee7a vi\u1ec7c chuy\u1ec3n m\u1ea1ch DC trong \u0111i\u1ec1u ki\u1ec7n n\u0103ng l\u01b0\u1ee3ng m\u1eb7t tr\u1eddi, v\u1ec1 c\u01a1 b\u1ea3n kh\u00e1c v\u1edbi chuy\u1ec3n m\u1ea1ch AC.<\/p>\n<h3>V\u1ea5n \u0111\u1ec1 \u0111i qua \u0111i\u1ec3m kh\u00f4ng<\/h3>\n<p>Trong c\u00e1c m\u1ea1ch AC, d\u00f2ng \u0111i\u1ec7n t\u1ef1 nhi\u00ean \u0111i qua \u0111i\u1ec3m kh\u00f4ng 100 ho\u1eb7c 120 l\u1ea7n m\u1ed7i gi\u00e2y, t\u00f9y thu\u1ed9c v\u00e0o vi\u1ec7c ngu\u1ed3n cung c\u1ea5p l\u00e0 50 Hz hay 60 Hz. Khi c\u00e1c ti\u1ebfp \u0111i\u1ec3m c\u00f4ng t\u1eafc m\u1edf ra, b\u1ea5t k\u1ef3 h\u1ed3 quang n\u00e0o h\u00ecnh th\u00e0nh \u0111\u1ec1u \u0111\u01b0\u1ee3c h\u1ed7 tr\u1ee3 b\u1edfi l\u1ea7n \u0111i qua \u0111i\u1ec3m kh\u00f4ng ti\u1ebfp theo, th\u01b0\u1eddng l\u00e0 trong v\u00f2ng v\u00e0i mili gi\u00e2y.<\/p>\n<p>D\u00f2ng \u0111i\u1ec7n DC kh\u00f4ng c\u00f3 \u0111i\u1ec3m \u0111i qua \u0111i\u1ec3m kh\u00f4ng. Khi m\u1ed9t h\u1ed3 quang h\u00ecnh th\u00e0nh gi\u1eefa c\u00e1c ti\u1ebfp \u0111i\u1ec3m m\u1edf trong m\u1ed9t m\u1ea1ch DC, n\u00f3 c\u00f3 th\u1ec3 t\u1ef1 duy tr\u00ec mi\u1ec5n l\u00e0 ngu\u1ed3n ti\u1ebfp t\u1ee5c cung c\u1ea5p d\u00f2ng \u0111i\u1ec7n. \u0110i\u1ec1u n\u00e0y c\u00f3 ngh\u0129a l\u00e0 m\u1ed9t c\u00f4ng t\u1eafc c\u00e1ch ly DC y\u00eau c\u1ea7u thi\u1ebft k\u1ebf ti\u1ebfp \u0111i\u1ec3m m\u1ea1nh m\u1ebd h\u01a1n, kho\u1ea3ng c\u00e1ch ti\u1ebfp \u0111i\u1ec3m r\u1ed9ng h\u01a1n v\u00e0 th\u01b0\u1eddng c\u00f3 c\u00e1c t\u00ednh n\u0103ng qu\u1ea3n l\u00fd h\u1ed3 quang ph\u00f9 h\u1ee3p v\u1edbi nhi\u1ec7m v\u1ee5 chuy\u1ec3n m\u1ea1ch DC th\u1ef1c t\u1ebf.<\/p>\n<h3>C\u00e1c th\u00e1ch th\u1ee9c c\u1ee5 th\u1ec3 kh\u00e1c c\u1ee7a DC<\/h3>\n<p>Ngo\u00e0i h\u00e0nh vi h\u1ed3 quang, m\u1ed9t c\u00f4ng t\u1eafc c\u00e1ch ly DC trong m\u1ed9t h\u1ec7 th\u1ed1ng PV c\u0169ng ph\u1ea3i \u0111\u1ed1i m\u1eb7t v\u1edbi:<\/p>\n<ul>\n<li><strong>\u0111i\u1ec7n \u00e1p DC li\u00ean t\u1ee5c trong ng\u00e0y<\/strong>, v\u00ec m\u1ea3ng kh\u00f4ng th\u1ec3 t\u1eaft theo c\u00e1ch t\u01b0\u01a1ng t\u1ef1 nh\u01b0 ngu\u1ed3n AC<\/li>\n<li><strong>kh\u1ea3 n\u0103ng c\u1ea5p ng\u01b0\u1ee3c t\u1eeb thi\u1ebft b\u1ecb \u0111\u01b0\u1ee3c k\u1ebft n\u1ed1i<\/strong>, t\u00f9y thu\u1ed9c v\u00e0o bi\u1ebfn t\u1ea7n, ki\u1ebfn tr\u00fac l\u01b0u tr\u1eef v\u00e0 c\u00e1c \u0111\u01b0\u1eddng d\u1eabn song song<\/li>\n<li><strong>\u1ee9ng su\u1ea5t m\u00f4i tr\u01b0\u1eddng ngo\u00e0i tr\u1eddi<\/strong>, bao g\u1ed3m b\u1ee9c x\u1ea1 UV, m\u01b0a, b\u1ee5i, chu k\u1ef3 nhi\u1ec7t \u0111\u1ed9 v\u00e0 \u1edf m\u1ed9t s\u1ed1 khu v\u1ef1c l\u00e0 s\u01b0\u01a1ng mu\u1ed1i<\/li>\n<li><strong>k\u1ef3 v\u1ecdng tu\u1ed5i th\u1ecd d\u00e0i<\/strong>, v\u00ec c\u00e1c h\u1ec7 th\u1ed1ng PV th\u01b0\u1eddng \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf cho nhi\u1ec1u th\u1eadp k\u1ef7 ho\u1ea1t \u0111\u1ed9ng<\/li>\n<\/ul>\n<h3>C\u00e1ch ch\u1ec9 \u0111\u1ecbnh c\u00f4ng t\u1eafc c\u00e1ch ly DC<\/h3>\n<p>Do nh\u1eefng th\u00e1ch th\u1ee9c n\u00e0y, c\u00e1c c\u00f4ng t\u1eafc c\u00e1ch ly DC PV \u0111\u01b0\u1ee3c ch\u1ecdn theo m\u1ed9t b\u1ed9 th\u00f4ng s\u1ed1 c\u1ee5 th\u1ec3 v\u01b0\u1ee3t xa nh\u1eefng g\u00ec m\u1ed9t c\u00f4ng t\u1eafc AC y\u00eau c\u1ea7u:<\/p>\n<table style=\"border-collapse: collapse; width: 100%; text-align: left; margin: 20px 0;\" border=\"1\">\n<thead>\n<tr>\n<th style=\"padding: 10px; background-color: #f2f2f2;\">Tham s\u1ed1<\/th>\n<th style=\"padding: 10px; background-color: #f2f2f2;\">T\u1ea1i sao n\u00f3 quan tr\u1ecdng \u0111\u1ed1i v\u1edbi DC<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td style=\"padding: 10px;\"><strong>\u0110i\u1ec7n \u00e1p DC \u0111\u1ecbnh m\u1ee9c (Ue)<\/strong><\/td>\n<td style=\"padding: 10px;\">Ph\u1ea3i v\u01b0\u1ee3t qu\u00e1 Voc h\u1ec7 th\u1ed1ng t\u1ed1i \u0111a bao g\u1ed3m hi\u1ec7u ch\u1ec9nh nhi\u1ec7t \u0111\u1ed9 l\u1ea1nh<\/td>\n<\/tr>\n<tr>\n<td style=\"padding: 10px;\"><strong>D\u00f2ng \u0111i\u1ec7n \u0111\u1ecbnh m\u1ee9c (Ie)<\/strong><\/td>\n<td style=\"padding: 10px;\">Ph\u1ea3i x\u1eed l\u00fd d\u00f2ng \u0111i\u1ec7n ho\u1ea1t \u0111\u1ed9ng PV li\u00ean t\u1ee5c v\u1edbi vi\u1ec7c gi\u1ea3m \u0111\u1ecbnh m\u1ee9c th\u00edch h\u1ee3p<\/td>\n<\/tr>\n<tr>\n<td style=\"padding: 10px;\"><strong>S\u1ed1 c\u1ef1c<\/strong><\/td>\n<td style=\"padding: 10px;\">X\u00e1c \u0111\u1ecbnh s\u1ed1 l\u01b0\u1ee3ng d\u00e2y d\u1eabn \u0111\u01b0\u1ee3c ng\u1eaft k\u1ebft n\u1ed1i \u0111\u1ed3ng th\u1eddi<\/td>\n<\/tr>\n<tr>\n<td style=\"padding: 10px;\"><strong>Th\u1ec3 lo\u1ea1i s\u1eed d\u1ee5ng<\/strong><\/td>\n<td style=\"padding: 10px;\">DC-21B ho\u1eb7c DC-22B theo IEC 60947-3 cho bi\u1ebft kh\u1ea3 n\u0103ng chuy\u1ec3n m\u1ea1ch DC th\u1ef1c t\u1ebf<\/td>\n<\/tr>\n<tr>\n<td style=\"padding: 10px;\"><strong>C\u1ea5p b\u1ea3o v\u1ec7 v\u1ecf (IP)<\/strong><\/td>\n<td style=\"padding: 10px;\">IP65 tr\u1edf l\u00ean cho c\u00e1c h\u1ec7 th\u1ed1ng l\u1eafp \u0111\u1eb7t PV ngo\u00e0i tr\u1eddi ti\u1ebfp x\u00fac v\u1edbi th\u1eddi ti\u1ebft<\/td>\n<\/tr>\n<tr>\n<td style=\"padding: 10px;\"><strong>C\u01a1 kh\u00ed s\u1ee9c ch\u1ecbu \u0111\u1ef1ng<\/strong><\/td>\n<td style=\"padding: 10px;\">S\u1ed1 l\u01b0\u1ee3ng chu k\u1ef3 ho\u1ea1t \u0111\u1ed9ng \u0111\u1ecbnh m\u1ee9c tr\u01b0\u1edbc khi ti\u1ebfp \u0111i\u1ec3m b\u1ecb suy gi\u1ea3m<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>\u0110\u1ed1i v\u1edbi c\u00e1c h\u1ec7 th\u1ed1ng l\u1eafp \u0111\u1eb7t \u1edf B\u1eafc M\u1ef9, c\u00e1c d\u1ef1 \u00e1n n\u00ean t\u00ecm ki\u1ebfm c\u00e1c thi\u1ebft b\u1ecb \u0111\u01b0\u1ee3c \u0111\u00e1nh gi\u00e1 theo <strong>UL 98B<\/strong> ho\u1eb7c t\u00ednh ph\u00f9 h\u1ee3p t\u01b0\u01a1ng \u0111\u01b0\u01a1ng. T\u1ea1i \u00dac v\u00e0 New Zealand, <strong>Energy Safe Victoria<\/strong> v\u00e0 <strong>Ti\u00eau chu\u1ea9n AS\/NZS 5033<\/strong> \u0111\u1eb7c bi\u1ec7t nh\u1ea5n m\u1ea1nh \u0111\u1ebfn s\u1ef1 an to\u00e0n c\u1ee7a c\u00f4ng t\u1eafc c\u00e1ch ly DC v\u00ec c\u00e1c s\u1ef1 c\u1ed1 c\u00e1ch ly trong l\u1ecbch s\u1eed c\u00f3 li\u00ean quan \u0111\u1ebfn c\u00e1c v\u1ee5 ch\u00e1y PV tr\u00ean m\u00e1i nh\u00e0.<\/p>\n<h2>T\u1ea1i Sao C\u00e1ch Ly DC L\u1ea1i Quan Tr\u1ecdng \u0110\u1ebfn V\u1eady Trong H\u1ec7 Th\u1ed1ng \u0110i\u1ec7n M\u1eb7t Tr\u1eddi PV<\/h2>\n<p>Ph\u00eda DC c\u1ee7a m\u1ed9t h\u1ec7 th\u1ed1ng \u0111i\u1ec7n m\u1eb7t tr\u1eddi t\u1ea1o ra m\u1ed9t t\u00ecnh hu\u1ed1ng an to\u00e0n kh\u00f4ng t\u1ed3n t\u1ea1i trong c\u00e1c h\u1ec7 th\u1ed1ng \u0111i\u1ec7n th\u00f4ng th\u01b0\u1eddng c\u1ee7a t\u00f2a nh\u00e0: <strong>ngu\u1ed3n kh\u00f4ng th\u1ec3 t\u1eaft \u0111\u01b0\u1ee3c<\/strong>.<\/p>\n<p>Mi\u1ec5n l\u00e0 c\u00f3 b\u1ee9c x\u1ea1 m\u1eb7t tr\u1eddi, c\u00e1c m\u00f4-\u0111un PV ti\u1ebfp t\u1ee5c t\u1ea1o ra \u0111i\u1ec7n \u00e1p. \u0110i\u1ec1u \u0111\u00f3 c\u00f3 ngh\u0129a l\u00e0:<\/p>\n<ul>\n<li>b\u1ed9 bi\u1ebfn t\u1ea7n c\u00f3 th\u1ec3 t\u1eaft<\/li>\n<li>c\u1ea7u dao AC ch\u00ednh c\u00f3 th\u1ec3 m\u1edf<\/li>\n<li>ngu\u1ed3n cung c\u1ea5p cho t\u00f2a nh\u00e0 c\u00f3 th\u1ec3 ho\u00e0n to\u00e0n b\u1ecb ng\u1eaft k\u1ebft n\u1ed1i<\/li>\n<\/ul>\n<p>nh\u01b0ng c\u00e1c d\u00e2y d\u1eabn PV gi\u1eefa m\u1ea3ng v\u00e0 b\u1ed9 bi\u1ebfn t\u1ea7n v\u1eabn c\u00f3 th\u1ec3 c\u00f3 \u0111i\u1ec7n.<\/p>\n<p>Vi\u1ec7c c\u1ea5p \u0111i\u1ec7n li\u00ean t\u1ee5c n\u00e0y l\u00e0 l\u00fd do c\u01a1 b\u1ea3n t\u1ea1i sao c\u00f4ng t\u1eafc c\u00e1ch ly DC t\u1ed3n t\u1ea1i trong c\u00e1c h\u1ec7 th\u1ed1ng PV. N\u1ebfu kh\u00f4ng c\u00f3 \u0111i\u1ec3m ng\u1eaft k\u1ebft n\u1ed1i th\u1ee7 c\u00f4ng chuy\u00ean d\u1ee5ng, kh\u00f4ng c\u00f3 c\u00e1ch r\u00f5 r\u00e0ng n\u00e0o \u0111\u1ec3 c\u00e1ch ly c\u00e1c d\u00e2y d\u1eabn DC cho c\u00f4ng vi\u1ec7c b\u1ea3o tr\u00ec.<\/p>\n<h3>Vai Tr\u00f2 An To\u00e0n c\u1ee7a C\u00f4ng T\u1eafc C\u00e1ch Ly DC<\/h3>\n<p><strong>C\u00e1ch ly b\u1ea3o tr\u00ec.<\/strong> Tr\u01b0\u1edbc khi thay th\u1ebf b\u1ed9 bi\u1ebfn t\u1ea7n, si\u1ebft l\u1ea1i c\u00e1c k\u1ebft n\u1ed1i h\u1ed9p k\u1ebft h\u1ee3p ho\u1eb7c thay th\u1ebf thi\u1ebft b\u1ecb b\u1ea3o v\u1ec7 ch\u1ed1ng s\u00e9t lan truy\u1ec1n, k\u1ef9 thu\u1eadt vi\u00ean ph\u1ea3i x\u00e1c nh\u1eadn r\u1eb1ng c\u00e1c d\u00e2y d\u1eabn DC \u0111\u00e3 \u0111\u01b0\u1ee3c ng\u1eaft \u0111i\u1ec7n. C\u00f4ng t\u1eafc c\u00e1ch ly DC h\u1ed7 tr\u1ee3 qu\u00e1 tr\u00ecnh \u0111\u00f3 b\u1eb1ng c\u00e1ch cung c\u1ea5p m\u1ed9t \u0111i\u1ec3m ng\u1eaft k\u1ebft n\u1ed1i r\u00f5 r\u00e0ng v\u00e0 c\u00f3 ch\u1ee7 \u00fd thay v\u00ec ch\u1ec9 d\u1ef1a v\u00e0o v\u1ecb tr\u00ed tay c\u1ea7m c\u1ee7a thi\u1ebft b\u1ecb b\u1ea3o v\u1ec7.<\/p>\n<p><strong>T\u1eaft kh\u1ea9n c\u1ea5p.<\/strong> Trong c\u00e1c t\u00ecnh hu\u1ed1ng h\u1ecfa ho\u1ea1n ho\u1eb7c kh\u1ea9n c\u1ea5p, nh\u1eefng ng\u01b0\u1eddi \u1ee9ng c\u1ee9u \u0111\u1ea7u ti\u00ean c\u1ea7n m\u1ed9t \u0111i\u1ec3m ng\u1eaft k\u1ebft n\u1ed1i \u0111\u01b0\u1ee3c \u0111\u00e1nh d\u1ea5u r\u00f5 r\u00e0ng, d\u1ec5 v\u1eadn h\u00e0nh. M\u1ed9t c\u00f4ng t\u1eafc c\u00e1ch ly DC c\u00f3 tay c\u1ea7m m\u00e0u \u0111\u1ecf v\u1edbi nh\u00e3n r\u00f5 r\u00e0ng c\u00f3 th\u1ec3 nh\u1eadn bi\u1ebft ngay l\u1eadp t\u1ee9c. M\u1ed9t h\u00e0ng c\u1ea7u dao thu nh\u1ecf b\u00ean trong m\u1ed9t v\u1ecf k\u00edn th\u00ec kh\u00f4ng.<\/p>\n<p><strong>H\u1ed7 tr\u1ee3 kh\u00f3a\/treo th\u1ebb.<\/strong> Nhi\u1ec1u c\u00f4ng t\u1eafc c\u00e1ch ly DC \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf v\u1edbi tay c\u1ea7m c\u00f3 th\u1ec3 kh\u00f3a b\u1eb1ng \u1ed5 kh\u00f3a, c\u00f3 th\u1ec3 kh\u00f3a \u1edf v\u1ecb tr\u00ed m\u1edf. \u0110i\u1ec1u n\u00e0y cho ph\u00e9p k\u1ef9 thu\u1eadt vi\u00ean ng\u0103n ch\u1eb7n vi\u1ec7c c\u1ea5p \u0111i\u1ec7n tr\u1edf l\u1ea1i m\u1ed9t c\u00e1ch v\u1eadt l\u00fd trong khi l\u00e0m vi\u1ec7c tr\u00ean h\u1ec7 th\u1ed1ng, tu\u00e2n theo quy tr\u00ecnh an to\u00e0n t\u1ea1i ch\u1ed7 hi\u1ec7n h\u00e0nh.<\/p>\n<p><strong>An to\u00e0n cho l\u00ednh c\u1ee9u h\u1ecfa.<\/strong> Energy Safe Victoria m\u00f4 t\u1ea3 c\u1ee5 th\u1ec3 c\u00f4ng t\u1eafc c\u00e1ch ly DC l\u00e0 m\u1ed9t c\u00f4ng t\u1eafc ng\u1eaft k\u1ebft n\u1ed1i th\u1ee7 c\u00f4ng, ng\u0103n d\u00f2ng \u0111i\u1ec7n do h\u1ec7 th\u1ed1ng PV t\u1ea1o ra ch\u1ea3y qua h\u1ec7 th\u1ed1ng \u0111\u1ec3 l\u00e0m cho n\u00f3 an to\u00e0n h\u01a1n cho c\u00e1c t\u00ecnh hu\u1ed1ng kh\u1ea9n c\u1ea5p ho\u1eb7c b\u1ea3o tr\u00ec. Ng\u00f4n ng\u1eef \u0111\u00f3 gi\u1eef cho vai tr\u00f2 r\u00f5 r\u00e0ng: <strong>n\u00f3 \u1edf \u0111\u00f3 \u0111\u1ec3 d\u1eebng d\u00f2ng ch\u1ea3y m\u1ed9t c\u00e1ch c\u00f3 ch\u1ee7 \u00fd, kh\u00f4ng ph\u1ea3i \u0111\u1ec3 ch\u1edd l\u1ed7i v\u00e0 t\u1ef1 \u0111\u1ed9ng ng\u1eaft<\/strong>.<\/p>\n<p><strong>Ghi ch\u00fa th\u1ef1c t\u1ebf t\u1eeb c\u00e1c cu\u1ed9c \u0111i\u1ec1u tra an to\u00e0n \u0111\u00e3 \u0111\u01b0\u1ee3c c\u00f4ng b\u1ed1:<\/strong> Energy Safe Victoria \u0111\u00e3 nhi\u1ec1u l\u1ea7n nh\u1ea5n m\u1ea1nh c\u00e1c b\u1ed9 c\u00e1ch ly DC tr\u00ean m\u00e1i nh\u00e0 b\u1ecb \u1ea3nh h\u01b0\u1edfng b\u1edfi \u0111\u1ed9 \u1ea9m l\u00e0 nguy\u00ean nh\u00e2n g\u00e2y h\u1ecfa ho\u1ea1n th\u1ef1c s\u1ef1 trong c\u00e1c h\u1ec7 th\u1ed1ng PV c\u0169 h\u01a1n. \u0110\u00f3 l\u00e0 m\u1ed9t l\u1eddi nh\u1eafc h\u1eefu \u00edch r\u1eb1ng vi\u1ec7c l\u1ef1a ch\u1ecdn b\u1ed9 c\u00e1ch ly ch\u1ec9 l\u00e0 m\u1ed9t n\u1eeda c\u00f4ng vi\u1ec7c. V\u1ecb tr\u00ed, ni\u00eam phong, \u0111\u1ea7u n\u1ed1i c\u00e1p v\u00e0 \u0111\u1ed9 b\u1ec1n ngo\u00e0i tr\u1eddi l\u00e2u d\u00e0i c\u0169ng quan tr\u1ecdng nh\u01b0 \u0111\u1ecbnh m\u1ee9c c\u00f4ng t\u1eafc tr\u00ean b\u1ea3ng d\u1eef li\u1ec7u.<\/p>\n<h2>C\u00e1ch Th\u1ee9c T\u1eaft Nhanh Ph\u00f9 H\u1ee3p<\/h2>\n<p>Trong c\u00f4ng vi\u1ec7c PV tr\u00ean m\u00e1i nh\u00e0 \u1edf B\u1eafc M\u1ef9, <strong>NEC 690.12 T\u1eaft Nhanh<\/strong> hi\u1ec7n n\u1eb1m c\u1ea1nh cu\u1ed9c th\u1ea3o lu\u1eadn v\u1ec1 ph\u01b0\u01a1ng ti\u1ec7n ng\u1eaft k\u1ebft n\u1ed1i truy\u1ec1n th\u1ed1ng. \u0110i\u1ec1u \u0111\u00f3 r\u1ea5t quan tr\u1ecdng v\u00ec m\u1ed9t s\u1ed1 nh\u00e0 thi\u1ebft k\u1ebf cho r\u1eb1ng vi\u1ec7c t\u1eaft nhanh \u0111\u00e3 l\u00e0m cho b\u1ed9 c\u00e1ch ly DC tr\u1edf n\u00ean kh\u00f4ng li\u00ean quan. N\u00f3 kh\u00f4ng ph\u1ea3i v\u1eady.<\/p>\n<p>T\u1eaft nhanh v\u00e0 c\u00e1ch ly DC gi\u1ea3i quy\u1ebft c\u00e1c v\u1ea5n \u0111\u1ec1 li\u00ean quan nh\u01b0ng kh\u00e1c nhau:<\/p>\n<ul>\n<li><strong>t\u1eaft nhanh<\/strong> gi\u1ea3m nguy c\u01a1 \u0111i\u1ec7n gi\u1eadt tr\u00ean c\u00e1c d\u00e2y d\u1eabn \u0111\u01b0\u1ee3c ch\u1ec9 \u0111\u1ecbnh trong ho\u1eb7c tr\u00ean c\u00e1c t\u00f2a nh\u00e0 sau khi t\u1eaft \u0111\u01b0\u1ee3c kh\u1edfi \u0111\u1ed9ng<\/li>\n<li><strong>b\u1ed9 c\u00e1ch ly DC ho\u1eb7c ph\u01b0\u01a1ng ti\u1ec7n ng\u1eaft k\u1ebft n\u1ed1i<\/strong> cung c\u1ea5p m\u1ed9t \u0111i\u1ec3m chuy\u1ec3n m\u1ea1ch c\u1ee5c b\u1ed9 c\u00f3 ch\u1ee7 \u00fd \u0111\u1ec3 c\u00e1ch ly b\u1ea3o tr\u00ec v\u00e0 quy tr\u00ecnh l\u00e0m vi\u1ec7c d\u1ecbch v\u1ee5<\/li>\n<\/ul>\n<p>T\u00e0i li\u1ec7u NFPA v\u1ec1 690.12 c\u0169ng h\u1eefu \u00edch \u1edf \u0111\u00e2y v\u00ec n\u00f3 l\u00e0m r\u00f5 r\u1eb1ng NEC kh\u00f4ng y\u00eau c\u1ea7u m\u1ed9t lo\u1ea1i thi\u1ebft b\u1ecb duy nh\u1ea5t \u0111\u1ec3 th\u1ef1c hi\u1ec7n ch\u1ee9c n\u0103ng t\u1eaft nhanh. T\u00f9y thu\u1ed9c v\u00e0o h\u1ec7 th\u1ed1ng, ch\u1ee9c n\u0103ng \u0111\u00f3 c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c x\u1eed l\u00fd \u1edf c\u1ea5p \u0111\u1ed9 m\u00f4-\u0111un, c\u1ea5p \u0111\u1ed9 m\u1ea3ng ho\u1eb7c th\u00f4ng qua c\u00e1c thi\u1ebft b\u1ecb \u0111\u01b0\u1ee3c li\u1ec7t k\u00ea kh\u00e1c. Trong th\u1ef1c t\u1ebf, \u0111i\u1ec1u \u0111\u00f3 c\u00f3 ngh\u0129a l\u00e0 vi\u1ec7c t\u1eaft nhanh kh\u00f4ng t\u1ef1 \u0111\u1ed9ng lo\u1ea1i b\u1ecf nhu c\u1ea7u v\u1ec1 m\u1ed9t ph\u01b0\u01a1ng ti\u1ec7n c\u00e1ch ly ph\u00eda DC c\u1ee5c b\u1ed9 r\u00f5 r\u00e0ng.<\/p>\n<h2>C\u00f4ng T\u1eafc C\u00e1ch Ly DC \u0110\u01b0\u1ee3c L\u1eafp \u0110\u1eb7t \u1ede \u0110\u00e2u Trong H\u1ec7 Th\u1ed1ng \u0110i\u1ec7n M\u1eb7t Tr\u1eddi PV?<\/h2>\n<p>V\u1ecb tr\u00ed l\u1eafp \u0111\u1eb7t ch\u00ednh x\u00e1c ph\u1ee5 thu\u1ed9c v\u00e0o ti\u00eau chu\u1ea9n d\u1ef1 \u00e1n, ki\u1ebfn tr\u00fac thi\u1ebft b\u1ecb, quy m\u00f4 h\u1ec7 th\u1ed1ng v\u00e0 khu v\u1ef1c ph\u00e1p l\u00fd. Tuy nhi\u00ean, logic v\u1ecb tr\u00ed tu\u00e2n theo m\u1ed9t nguy\u00ean t\u1eafc nh\u1ea5t qu\u00e1n:<\/p>\n<p><strong>c\u00f4ng t\u1eafc c\u00e1ch ly DC \u0111i \u0111\u1ebfn n\u01a1i k\u1ef9 thu\u1eadt vi\u00ean c\u1ea7n m\u1ed9t \u0111i\u1ec3m ng\u1eaft k\u1ebft n\u1ed1i an to\u00e0n, d\u1ec5 ti\u1ebfp c\u1eadn v\u00e0 tu\u00e2n th\u1ee7 theo quy \u0111\u1ecbnh.<\/strong><\/p>\n<figure style=\"text-align: center; margin: 20px 0;\"><img decoding=\"async\" style=\"max-width: 100%; height: auto;\" src=\"https:\/\/img.viox.com\/Technical-diagram-showing-where-a-DC-solar-isolator-switch-is-installed-in-a-photovoltaic-system.webp\" alt=\"Technical diagram showing where a DC solar isolator switch is typically installed in a photovoltaic system\" \/><figcaption style=\"font-style: italic; color: #555; margin-top: 10px; font-size: 0.9em;\">M\u1ed9t s\u01a1 \u0111\u1ed3 k\u1ef9 thu\u1eadt to\u00e0n di\u1ec7n chi ti\u1ebft v\u1ecb tr\u00ed c\u00f4ng t\u1eafc c\u00e1ch ly n\u0103ng l\u01b0\u1ee3ng m\u1eb7t tr\u1eddi DC ti\u00eau chu\u1ea9n trong ki\u1ebfn tr\u00fac quang \u0111i\u1ec7n, th\u1ec3 hi\u1ec7n c\u1ea3 chi\u1ebfn l\u01b0\u1ee3c c\u00e1ch ly ph\u00eda m\u1ea3ng v\u00e0 ph\u00eda bi\u1ebfn t\u1ea7n.<\/figcaption><\/figure>\n<h3>V\u1ecb tr\u00ed 1: G\u1ea7n ho\u1eb7c T\u00edch h\u1ee3p v\u1edbi B\u1ed9 Bi\u1ebfn T\u1ea7n<\/h3>\n<p>V\u1ecb tr\u00ed c\u00f4ng t\u1eafc c\u00e1ch ly DC ph\u1ed5 bi\u1ebfn nh\u1ea5t l\u00e0 g\u1ea7n \u0111\u1ea7u v\u00e0o b\u1ed9 bi\u1ebfn t\u1ea7n. V\u1ecb tr\u00ed n\u00e0y cung c\u1ea5p cho k\u1ef9 thu\u1eadt vi\u00ean m\u1ed9t \u0111i\u1ec3m ng\u1eaft k\u1ebft n\u1ed1i ph\u00eda DC c\u1ee5c b\u1ed9 ngay tr\u01b0\u1edbc b\u1ed9 bi\u1ebfn t\u1ea7n, cho ph\u00e9p ng\u1eaft \u0111i\u1ec7n an to\u00e0n h\u01a1n c\u00e1c \u0111\u1ea7u cu\u1ed1i DC c\u1ee7a b\u1ed9 bi\u1ebfn t\u1ea7n tr\u01b0\u1edbc khi th\u1ef1c hi\u1ec7n c\u00f4ng vi\u1ec7c b\u1ea3o tr\u00ec.<\/p>\n<p>Nhi\u1ec1u b\u1ed9 bi\u1ebfn t\u1ea7n chu\u1ed7i hi\u1ec7n \u0111\u1ea1i t\u00edch h\u1ee3p c\u00f4ng t\u1eafc c\u00e1ch ly DC tr\u1ef1c ti\u1ebfp v\u00e0o v\u1ecf b\u1ed9 bi\u1ebfn t\u1ea7n. C\u00e1ch ti\u1ebfp c\u1eadn t\u00edch h\u1ee3p n\u00e0y ng\u00e0y c\u00e0ng \u0111\u01b0\u1ee3c \u01b0a chu\u1ed9ng \u1edf m\u1ed9t s\u1ed1 th\u1ecb tr\u01b0\u1eddng v\u00ec n\u00f3 l\u00e0m gi\u1ea3m c\u00e1c \u0111\u1ea7u cu\u1ed1i b\u00ean ngo\u00e0i ti\u1ebfp x\u00fac, lo\u1ea1i b\u1ecf c\u00e1c l\u1ed7 xuy\u00ean v\u1ecf b\u1ed5 sung v\u00e0 lo\u1ea1i b\u1ecf m\u1ed9t \u0111i\u1ec3m h\u1ecfng h\u00f3c ngo\u00e0i tr\u1eddi ph\u1ed5 bi\u1ebfn.<\/p>\n<p>Energy Safe Victoria \u0111\u00e3 th\u1ea3o lu\u1eadn r\u00f5 r\u00e0ng v\u1ec1 h\u01b0\u1edbng n\u00e0y trong h\u01b0\u1edbng d\u1eabn an to\u00e0n v\u1ec1 b\u1ed9 c\u00e1ch ly DC c\u1ee7a m\u00ecnh, l\u01b0u \u00fd r\u1eb1ng c\u00e1c b\u1ed9 c\u00e1ch ly t\u00edch h\u1ee3p c\u00f3 th\u1ec3 l\u00e0m gi\u1ea3m s\u1ed1 l\u01b0\u1ee3ng th\u00e0nh ph\u1ea7n ti\u1ebfp x\u00fac v\u1edbi s\u1ef1 xu\u1ed1ng c\u1ea5p li\u00ean quan \u0111\u1ebfn th\u1eddi ti\u1ebft.<\/p>\n<h3>V\u1ecb tr\u00ed 2: T\u1ea1i \u0110\u1ea7u Ra H\u1ed9p K\u1ebft H\u1ee3p<\/h3>\n<p>Trong c\u00e1c h\u1ec7 th\u1ed1ng s\u1eed d\u1ee5ng h\u1ed9p k\u1ebft h\u1ee3p, ph\u00eda \u0111\u1ea7u ra c\u1ee7a h\u1ed9p k\u1ebft h\u1ee3p l\u00e0 m\u1ed9t v\u1ecb tr\u00ed t\u1ef1 nhi\u00ean cho c\u00f4ng t\u1eafc c\u00e1ch ly DC. \u0110i\u1ec1u n\u00e0y cho ph\u00e9p t\u00e1ch \u0111\u1ea7u ra k\u1ebft h\u1ee3p c\u1ee7a t\u1ea5t c\u1ea3 c\u00e1c chu\u1ed7i PV kh\u1ecfi \u0111\u01b0\u1eddng c\u00e1p h\u1ea1 l\u01b0u \u0111\u1ebfn b\u1ed9 bi\u1ebfn t\u1ea7n.<\/p>\n<p>Trong c\u1ea5u h\u00ecnh n\u00e0y, c\u00f4ng t\u1eafc c\u00e1ch ly DC \u1edf \u0111\u1ea7u ra b\u1ed9 k\u1ebft h\u1ee3p th\u01b0\u1eddng \u0111\u00f3ng vai tr\u00f2 l\u00e0 \u0111i\u1ec3m ng\u1eaft k\u1ebft n\u1ed1i c\u1ee5c b\u1ed9 duy nh\u1ea5t cho to\u00e0n b\u1ed9 h\u1ed9p k\u1ebft h\u1ee3p. M\u1ed9t k\u1ef9 thu\u1eadt vi\u00ean c\u00f3 th\u1ec3 m\u1edf v\u00e0 kh\u00f3a m\u1ed9t b\u1ed9 c\u00e1ch ly \u0111\u1ec3 c\u00e1ch ly \u0111\u01b0\u1eddng d\u1eabn h\u1ea1 l\u01b0u, thay v\u00ec ch\u1ec9 d\u1ef1a v\u00e0o vi\u1ec7c m\u1edf ri\u00eang t\u1eebng thi\u1ebft b\u1ecb b\u1ea3o v\u1ec7 chu\u1ed7i b\u00ean trong h\u1ed9p.<\/p>\n<p>\u0110\u1ec3 bi\u1ebft th\u00eam v\u1ec1 b\u1ed1i c\u1ea3nh h\u1ed9p k\u1ebft h\u1ee3p, <a href=\"https:\/\/test.viox.com\/vi\/what-does-a-solar-combiner-box-do\/\">gi\u1ea3i th\u00edch v\u1ec1 h\u1ed9p k\u1ebft h\u1ee3p n\u0103ng l\u01b0\u1ee3ng m\u1eb7t tr\u1eddi<\/a> v\u00e0 <a href=\"https:\/\/test.viox.com\/vi\/combiner-box\/\">trang s\u1ea3n ph\u1ea9m h\u1ed9p k\u1ebft h\u1ee3p<\/a> cung c\u1ea5p n\u1ec1n t\u1ea3ng thi\u1ebft b\u1ecb c\u00f3 li\u00ean quan.<\/p>\n<h3>V\u1ecb tr\u00ed 3: \u0110i\u1ec3m C\u00e1ch Ly Ph\u00eda M\u1ea3ng ho\u1eb7c Tr\u00ean M\u00e1i Nh\u00e0<\/h3>\n<p>M\u1ed9t s\u1ed1 ti\u00eau chu\u1ea9n d\u1ef1 \u00e1n v\u00e0 quy t\u1eafc khu v\u1ef1c y\u00eau c\u1ea7u ho\u1eb7c khuy\u1ebfn kh\u00edch c\u00f4ng t\u1eafc c\u00e1ch ly DC ph\u00eda m\u1ea3ng ngo\u00e0i c\u00f4ng t\u1eafc ng\u1eaft k\u1ebft n\u1ed1i ph\u00eda bi\u1ebfn t\u1ea7n. \u0110i\u1ec1u n\u00e0y \u0111\u1eb7c bi\u1ec7t ph\u1ed5 bi\u1ebfn trong c\u00e1c h\u1ec7 th\u1ed1ng PV tr\u00ean m\u00e1i nh\u00e0, n\u01a1i \u0111\u01b0\u1eddng c\u00e1p t\u1eeb m\u1ea3ng \u0111\u1ebfn b\u1ed9 bi\u1ebfn t\u1ea7n \u0111i qua c\u00e1c khu v\u1ef1c c\u00f3 th\u1ec3 ti\u1ebfp c\u1eadn.<\/p>\n<p>M\u1ee5c \u0111\u00edch c\u1ee7a b\u1ed9 c\u00e1ch ly ph\u00eda m\u1ea3ng l\u00e0 cho ph\u00e9p ng\u1eaft k\u1ebft n\u1ed1i g\u1ea7n ngu\u1ed3n h\u01a1n. Tuy nhi\u00ean, y\u00eau c\u1ea7u ch\u00ednh x\u00e1c kh\u00e1c nhau t\u00f9y theo khu v\u1ef1c ph\u00e1p l\u00fd v\u00e0 c\u00e1ch ti\u1ebfp c\u1eadn \u01b0a th\u00edch \u0111\u00e3 ph\u00e1t tri\u1ec3n theo th\u1eddi gian v\u00ec b\u1ea3n th\u00e2n c\u00e1c c\u00f4ng t\u1eafc c\u00e1ch ly g\u1eafn tr\u00ean m\u00e1i nh\u00e0 c\u0169ng \u0111\u00e3 tr\u1edf th\u00e0nh m\u1ed9t m\u1ed1i lo ng\u1ea1i v\u1ec1 \u0111\u1ed9 tin c\u1eady \u1edf m\u1ed9t s\u1ed1 th\u1ecb tr\u01b0\u1eddng.<\/p>\n<h3>Nguy\u00ean T\u1eafc V\u1ecb Tr\u00ed Quan Tr\u1ecdng Nh\u1ea5t<\/h3>\n<p>Thay v\u00ec h\u1ecfi \u201ct\u00f4i c\u00f3 th\u1ec3 l\u1eafp c\u00f4ng t\u1eafc \u1edf \u0111\u00e2u?\u201d, c\u00e2u h\u1ecfi thi\u1ebft k\u1ebf t\u1ed1t h\u01a1n l\u00e0:<\/p>\n<p><strong>D\u1ef1 \u00e1n c\u1ea7n m\u1ed9t ph\u01b0\u01a1ng ti\u1ec7n ng\u1eaft k\u1ebft n\u1ed1i DC an to\u00e0n, d\u1ec5 ti\u1ebfp c\u1eadn v\u00e0 \u0111\u01b0\u1ee3c ch\u1ea5p nh\u1eadn theo quy \u0111\u1ecbnh \u1edf \u0111\u00e2u?<\/strong><\/p>\n<p>C\u00e2u tr\u1ea3 l\u1eddi \u0111\u00f3 ph\u1ee5 thu\u1ed9c v\u00e0o quy tr\u00ecnh l\u00e0m vi\u1ec7c d\u1ecbch v\u1ee5, y\u00eau c\u1ea7u ki\u1ec3m tra, ki\u1ebfn tr\u00fac h\u1ed9p k\u1ebft h\u1ee3p, c\u00e1ch b\u1ed1 tr\u00ed b\u1ed9 bi\u1ebfn t\u1ea7n, \u0111\u1ecbnh tuy\u1ebfn c\u00e1p v\u00e0 quy t\u1eafc \u0111i\u1ec7n chi ph\u1ed1i. Trong nhi\u1ec1u c\u00e0i \u0111\u1eb7t, c\u00e2u tr\u1ea3 l\u1eddi l\u00e0 nhi\u1ec1u h\u01a1n m\u1ed9t v\u1ecb tr\u00ed.<\/p>\n<h2>C\u00f4ng T\u1eafc C\u00e1ch Ly DC Kh\u00f4ng L\u00e0m G\u00ec<\/h2>\n<p>\u0110\u00e2y l\u00e0 n\u01a1i s\u1ef1 nh\u1ea7m l\u1eabn g\u00e2y ra nh\u1eefng sai s\u00f3t k\u1ef9 thu\u1eadt th\u1ef1c s\u1ef1.<\/p>\n<p>M\u1ed9t c\u00f4ng t\u1eafc c\u00e1ch ly DC kh\u00f4ng <strong>kh\u00f4ng<\/strong> th\u1ef1c hi\u1ec7n c\u00f4ng vi\u1ec7c c\u1ee7a m\u1ed9t c\u1ea7u dao ho\u1eb7c c\u1ea7u ch\u00ec DC. C\u1ee5 th\u1ec3:<\/p>\n<ul>\n<li>n\u00f3 kh\u00f4ng <strong>kh\u00f4ng<\/strong> t\u1ef1 \u0111\u1ed9ng ph\u00e1t hi\u1ec7n c\u00e1c \u0111i\u1ec1u ki\u1ec7n qu\u00e1 d\u00f2ng<\/li>\n<li>n\u00f3 kh\u00f4ng <strong>kh\u00f4ng<\/strong> t\u1ef1 ng\u1eaft khi \u0111o\u1ea3n m\u1ea1ch<\/li>\n<li>n\u00f3 kh\u00f4ng <strong>kh\u00f4ng<\/strong> cung c\u1ea5p b\u1ea3o v\u1ec7 l\u1ed7i tr\u00ean m\u1ed7i chu\u1ed7i<\/li>\n<li>n\u00f3 kh\u00f4ng <strong>kh\u00f4ng<\/strong> thay th\u1ebf m\u1ed9t chi\u1ebfn l\u01b0\u1ee3c b\u1ea3o v\u1ec7 qu\u00e1 d\u00f2ng \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf \u0111\u00fang c\u00e1ch<\/li>\n<\/ul>\n<p>M\u1ed9t c\u00f4ng t\u1eafc c\u00e1ch ly DC \u0111\u01b0\u1ee3c ch\u1ecdn cho <strong>nhi\u1ec7m v\u1ee5 ng\u1eaft k\u1ebft n\u1ed1i v\u00e0 c\u00e1ch ly<\/strong>. Vi\u1ec7c n\u00f3 c\u00f3 th\u1ec3 ho\u1ea1t \u0111\u1ed9ng d\u01b0\u1edbi t\u1ea3i hay kh\u00f4ng ph\u1ee5 thu\u1ed9c v\u00e0o \u0111\u1ecbnh m\u1ee9c th\u1ef1c t\u1ebf v\u00e0 lo\u1ea1i s\u1eed d\u1ee5ng c\u1ee7a n\u00f3. Kh\u00f4ng n\u00ean coi nh\u01b0 b\u1ea5t k\u1ef3 b\u1ed9 c\u00e1ch ly n\u00e0o c\u0169ng c\u00f3 th\u1ec3 ng\u1eaft m\u1ed9t c\u00e1ch an to\u00e0n b\u1ea5t k\u1ef3 d\u00f2ng \u0111i\u1ec7n s\u1ef1 c\u1ed1 PV tr\u1ef1c ti\u1ebfp n\u00e0o ch\u1ec9 v\u00ec n\u00f3 m\u1edf m\u1ea1ch.<\/p>\n<p>\u0110\u00e2y l\u00e0 l\u00fd do t\u1ea1i sao h\u1ea7u h\u1ebft c\u00e1c h\u1ec7 th\u1ed1ng PV s\u1eed d\u1ee5ng c\u00e1ch b\u1ed1 tr\u00ed b\u1ea3o v\u1ec7 theo l\u1edbp:<\/p>\n<ul>\n<li><strong>c\u00f4ng t\u1eafc c\u00e1ch ly DC<\/strong> cho nhi\u1ec7m v\u1ee5 ng\u1eaft k\u1ebft n\u1ed1i th\u1ee7 c\u00f4ng v\u00e0 c\u00e1ch ly<\/li>\n<li><strong>B\u1ed9 ng\u1eaft m\u1ea1ch DC ho\u1eb7c c\u1ea7u ch\u00ec<\/strong> \u0111\u1ec3 b\u1ea3o v\u1ec7 qu\u00e1 d\u00f2ng t\u1ef1 \u0111\u1ed9ng<\/li>\n<li><strong>\u7535\u6d8c\u4fdd\u62a4\u88c5\u7f6e\uff08SPDs\uff09<\/strong> \u0111\u1ec3 b\u1ea3o v\u1ec7 ch\u1ed1ng qu\u00e1 \u00e1p tho\u00e1ng qua khi c\u1ea7n thi\u1ebft<\/li>\n<\/ul>\n<p>M\u1ed7i l\u1edbp gi\u1ea3i quy\u1ebft m\u1ed9t ch\u1ebf \u0111\u1ed9 l\u1ed7i kh\u00e1c nhau. Kh\u00f4ng l\u1edbp n\u00e0o thay th\u1ebf c\u00e1c l\u1edbp kh\u00e1c.<\/p>\n<h2>C\u00f4ng t\u1eafc c\u00e1ch ly DC so v\u1edbi B\u1ed9 ng\u1eaft m\u1ea1ch DC: Hi\u1ec3u s\u1ef1 kh\u00e1c bi\u1ec7t<\/h2>\n<p>M\u1ed9t trong nh\u1eefng c\u00e2u h\u1ecfi ph\u1ed5 bi\u1ebfn nh\u1ea5t trong thi\u1ebft k\u1ebf h\u1ec7 th\u1ed1ng PV l\u00e0 li\u1ec7u c\u00f4ng t\u1eafc c\u00e1ch ly DC v\u00e0 b\u1ed9 ng\u1eaft m\u1ea1ch DC c\u00f3 th\u1ec3 thay th\u1ebf cho nhau hay kh\u00f4ng. Ch\u00fang kh\u00f4ng th\u1ec3 thay th\u1ebf cho nhau.<\/p>\n<table style=\"border-collapse: collapse; width: 100%; text-align: left; margin: 20px 0;\" border=\"1\">\n<thead>\n<tr>\n<th style=\"padding: 10px; background-color: #f2f2f2;\">N\u0103ng<\/th>\n<th style=\"padding: 10px; background-color: #f2f2f2;\">DC Ly Chuy\u1ec3n<\/th>\n<th style=\"padding: 10px; background-color: #f2f2f2;\">B\u1ed9 ng\u1eaft m\u1ea1ch DC<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td style=\"padding: 10px;\"><strong>Ch\u1ee9c n\u0103ng ch\u00ednh<\/strong><\/td>\n<td style=\"padding: 10px;\">C\u00e1ch ly v\u00e0 ng\u1eaft k\u1ebft n\u1ed1i th\u1ee7 c\u00f4ng<\/td>\n<td style=\"padding: 10px;\">Ph\u00e1t hi\u1ec7n v\u00e0 ng\u1eaft qu\u00e1 d\u00f2ng t\u1ef1 \u0111\u1ed9ng<\/td>\n<\/tr>\n<tr>\n<td style=\"padding: 10px;\"><strong>C\u01a1 ch\u1ebf ng\u1eaft<\/strong><\/td>\n<td style=\"padding: 10px;\">Kh\u00f4ng - ch\u1ec9 ho\u1ea1t \u0111\u1ed9ng th\u1ee7 c\u00f4ng<\/td>\n<td style=\"padding: 10px;\">C\u00f3 - chuy\u1ebfn \u0111i nhi\u1ec7t, t\u1eeb t\u00ednh ho\u1eb7c \u0111i\u1ec7n t\u1eed<\/td>\n<\/tr>\n<tr>\n<td style=\"padding: 10px;\"><strong>\u0110\u01b0\u1ee3c thi\u1ebft k\u1ebf \u0111\u1ec3 ng\u1eaft t\u1ea3i?<\/strong><\/td>\n<td style=\"padding: 10px;\">T\u00f9y thu\u1ed9c v\u00e0o \u0111\u1ecbnh m\u1ee9c v\u00e0 lo\u1ea1i s\u1eed d\u1ee5ng th\u1ef1c t\u1ebf c\u1ee7a c\u00f4ng t\u1eafc-b\u1ed9 ng\u1eaft k\u1ebft n\u1ed1i<\/td>\n<td style=\"padding: 10px;\">C\u00f3, trong ph\u1ea1m vi nhi\u1ec7m v\u1ee5 b\u1ea3o v\u1ec7 DC \u0111\u01b0\u1ee3c \u0111\u1ecbnh m\u1ee9c c\u1ee7a thi\u1ebft b\u1ecb<\/td>\n<\/tr>\n<tr>\n<td style=\"padding: 10px;\"><strong>\u0110\u1ed9 tin c\u1eady c\u00e1ch ly \u0111\u1ec3 b\u1ea3o tr\u00ec<\/strong><\/td>\n<td style=\"padding: 10px;\">Th\u01b0\u1eddng m\u1ea1nh h\u01a1n v\u00ec thi\u1ebft b\u1ecb \u0111\u01b0\u1ee3c ch\u1ecdn \u0111\u1eb7c bi\u1ec7t cho nhi\u1ec7m v\u1ee5 c\u00e1ch ly<\/td>\n<td style=\"padding: 10px;\">T\u00f9y thu\u1ed9c v\u00e0o thi\u1ebft b\u1ecb, c\u00e1c ph\u1ee5 ki\u1ec7n c\u1ee7a n\u00f3 v\u00e0 li\u1ec7u n\u00f3 c\u00f3 \u0111\u01b0\u1ee3c ch\u1ea5p nh\u1eadn l\u00e0 ph\u01b0\u01a1ng ti\u1ec7n ng\u1eaft k\u1ebft n\u1ed1i hay kh\u00f4ng<\/td>\n<\/tr>\n<tr>\n<td style=\"padding: 10px;\"><strong>Kh\u1ea3 n\u0103ng kh\u00f3a\/g\u1eafn th\u1ebb<\/strong><\/td>\n<td style=\"padding: 10px;\">Th\u01b0\u1eddng c\u00f3 th\u1ec3 kh\u00f3a b\u1eb1ng \u1ed5 kh\u00f3a \u1edf v\u1ecb tr\u00ed m\u1edf<\/td>\n<td style=\"padding: 10px;\">\u0110\u00f4i khi c\u00f3 th\u1ec3 v\u1edbi c\u00e1c ph\u1ee5 ki\u1ec7n, nh\u01b0ng kh\u00f4ng ph\u1ea3i l\u00fac n\u00e0o c\u0169ng l\u00e0 b\u1ed9 c\u00e1ch ly d\u1ecbch v\u1ee5 \u0111\u01b0\u1ee3c \u01b0u ti\u00ean<\/td>\n<\/tr>\n<tr>\n<td style=\"padding: 10px;\"><strong>T\u00ednh ch\u1ecdn l\u1ecdc tr\u00ean m\u1ed7i chu\u1ed7i<\/strong><\/td>\n<td style=\"padding: 10px;\">Kh\u00f4ng - cung c\u1ea5p c\u00e1ch ly m\u1ea1ch<\/td>\n<td style=\"padding: 10px;\">C\u00f3 - c\u00f3 th\u1ec3 b\u1ea3o v\u1ec7 c\u00e1c chu\u1ed7i ho\u1eb7c nh\u00f3m ri\u00eang l\u1ebb t\u00f9y thu\u1ed9c v\u00e0o ki\u1ebfn tr\u00fac<\/td>\n<\/tr>\n<tr>\n<td style=\"padding: 10px;\"><strong>V\u1ecb tr\u00ed PV \u0111i\u1ec3n h\u00ecnh<\/strong><\/td>\n<td style=\"padding: 10px;\">Ph\u00eda bi\u1ebfn t\u1ea7n, \u0111\u1ea7u ra b\u1ed9 k\u1ebft h\u1ee3p ho\u1eb7c ng\u1eaft k\u1ebft n\u1ed1i ph\u00eda m\u1ea3ng<\/td>\n<td style=\"padding: 10px;\">B\u00ean trong h\u1ed9p k\u1ebft h\u1ee3p, m\u1ed9t cho m\u1ed7i chu\u1ed7i ho\u1eb7c nh\u00f3m chu\u1ed7i, ho\u1eb7c t\u1ea1i \u0111i\u1ec3m b\u1ea3o v\u1ec7 b\u1ed9 c\u1ea5p li\u1ec7u<\/td>\n<\/tr>\n<tr>\n<td style=\"padding: 10px;\"><strong>N\u00f3 c\u00f3 th\u1ec3 thay th\u1ebf c\u00e1i kia kh\u00f4ng?<\/strong><\/td>\n<td style=\"padding: 10px;\">Kh\u00f4ng, kh\u00f4ng d\u00f9ng \u0111\u1ec3 b\u1ea3o v\u1ec7 qu\u00e1 d\u00f2ng<\/td>\n<td style=\"padding: 10px;\">Kh\u00f4ng t\u1ef1 \u0111\u1ed9ng v\u00e0 ch\u1ec9 khi danh s\u00e1ch v\u00e0 \u1ee9ng d\u1ee5ng cho ph\u00e9p<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>H\u00e0ng cu\u1ed1i c\u00f9ng l\u00e0 \u0111i\u1ec1u c\u1ea7n thi\u1ebft. M\u1ed9t b\u1ed9 ng\u1eaft m\u1ea1ch c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c ch\u1ea5p nh\u1eadn nh\u01b0 m\u1ed9t ph\u01b0\u01a1ng ti\u1ec7n ng\u1eaft k\u1ebft n\u1ed1i trong m\u1ed9t s\u1ed1 c\u1ea5u h\u00ecnh c\u1ee5 th\u1ec3 n\u1ebfu danh s\u00e1ch v\u00e0 \u1ee9ng d\u1ee5ng c\u1ee7a n\u00f3 cho ph\u00e9p r\u00f5 r\u00e0ng, nh\u01b0ng \u0111i\u1ec1u \u0111\u00f3 ph\u1ea3i \u0111\u01b0\u1ee3c x\u00e1c minh theo m\u00e3 \u00e1p d\u1ee5ng. T\u01b0\u01a1ng t\u1ef1, m\u1ed9t c\u00f4ng t\u1eafc c\u00e1ch ly DC kh\u00f4ng ph\u1ea3i l\u00e0 m\u1ed9t thi\u1ebft b\u1ecb b\u1ea3o v\u1ec7 qu\u00e1 d\u00f2ng b\u1ea5t k\u1ec3 \u0111\u1ecbnh m\u1ee9c d\u00f2ng \u0111i\u1ec7n c\u1ee7a n\u00f3.<\/p>\n<p>\u0110\u1ec3 t\u00ecm hi\u1ec3u s\u00e2u h\u01a1n v\u1ec1 ranh gi\u1edbi n\u00e0y, \u0111\u1eb7c bi\u1ec7t l\u00e0 trong b\u1ed1i c\u1ea3nh h\u1ed9p k\u1ebft h\u1ee3p, h\u00e3y xem <a href=\"https:\/\/test.viox.com\/vi\/dc-isolator-vs-dc-circuit-breaker-complete-comparison-guide\/\">B\u1ed9 c\u00e1ch ly DC so v\u1edbi B\u1ed9 ng\u1eaft m\u1ea1ch DC trong H\u1ed9p k\u1ebft h\u1ee3p n\u0103ng l\u01b0\u1ee3ng m\u1eb7t tr\u1eddi<\/a>.<\/p>\n<p>N\u1ebfu b\u1ea1n \u0111ang \u0111\u00e1nh gi\u00e1 c\u00e1c t\u00f9y ch\u1ecdn thi\u1ebft b\u1ecb th\u1ef1c t\u1ebf thay v\u00ec vai tr\u00f2 c\u1ee7a ch\u00ednh n\u00f3, th\u00ec <a href=\"https:\/\/test.viox.com\/vi\/dc-isolator-switch\/\">Trang s\u1ea3n ph\u1ea9m C\u00f4ng t\u1eafc c\u00e1ch ly VIOX DC<\/a> l\u00e0 t\u00e0i li\u1ec7u tham kh\u1ea3o s\u1ea3n ph\u1ea9m ph\u00f9 h\u1ee3p nh\u1ea5t.<\/p>\n<h2>M\u1ed9t v\u00ed d\u1ee5 th\u1ef1c t\u1ebf v\u1ec1 h\u1ec7 th\u1ed1ng PV<\/h2>\n<p>Xem x\u00e9t m\u1ed9t h\u1ec7 th\u1ed1ng l\u1eafp \u0111\u1eb7t n\u0103ng l\u01b0\u1ee3ng m\u1eb7t tr\u1eddi tr\u00ean m\u00e1i nh\u00e0 th\u01b0\u01a1ng m\u1ea1i 200 kW v\u1edbi t\u00e1m h\u1ed9p k\u1ebft h\u1ee3p, m\u1ed7i h\u1ed9p t\u1ed5ng h\u1ee3p m\u01b0\u1eddi chu\u1ed7i. \u0110\u00e2y l\u00e0 c\u00e1ch c\u00f4ng t\u1eafc c\u00e1ch ly DC v\u00e0 b\u1ed9 ng\u1eaft m\u1ea1ch th\u01b0\u1eddng ho\u1ea1t \u0111\u1ed9ng c\u00f9ng nhau trong lo\u1ea1i ki\u1ebfn tr\u00fac n\u00e0y:<\/p>\n<p><strong>B\u00ean trong m\u1ed7i h\u1ed9p k\u1ebft h\u1ee3p:<\/strong><\/p>\n<ul>\n<li>b\u1ea3o v\u1ec7 qu\u00e1 d\u00f2ng c\u1ea5p chu\u1ed7i, c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c th\u1ef1c hi\u1ec7n b\u1eb1ng b\u1ed9 ng\u1eaft m\u1ea1ch DC ho\u1eb7c c\u1ea7u ch\u00ec t\u00f9y thu\u1ed9c v\u00e0o c\u01a1 s\u1edf thi\u1ebft k\u1ebf<\/li>\n<li>m\u1ed9t c\u00f4ng t\u1eafc c\u00e1ch ly DC ho\u1eb7c ph\u01b0\u01a1ng ti\u1ec7n ng\u1eaft k\u1ebft n\u1ed1i t\u01b0\u01a1ng \u0111\u01b0\u01a1ng tr\u00ean \u0111\u1ea7u ra b\u1ed9 k\u1ebft h\u1ee3p \u0111\u1ec3 cung c\u1ea5p m\u1ed9t \u0111i\u1ec3m c\u00e1ch ly d\u1ecbch v\u1ee5 c\u1ee5c b\u1ed9<\/li>\n<\/ul>\n<p><strong>T\u1ea1i bi\u1ebfn t\u1ea7n:<\/strong><\/p>\n<ul>\n<li>m\u1ed9t c\u00f4ng t\u1eafc c\u00e1ch ly DC, t\u00edch h\u1ee3p ho\u1eb7c li\u1ec1n k\u1ec1, cung c\u1ea5p m\u1ed9t \u0111i\u1ec3m ng\u1eaft k\u1ebft n\u1ed1i cu\u1ed1i c\u00f9ng tr\u01b0\u1edbc \u0111\u1ea7u v\u00e0o bi\u1ebfn t\u1ea7n<\/li>\n<li>thi\u1ebft b\u1ecb t\u1eaft nhanh ho\u1eb7c ki\u1ebfn tr\u00fac t\u1eaft c\u1ea5p m\u00f4-\u0111un n\u01a1i \u0111\u01b0\u1eddng d\u1eabn m\u00e3 x\u00e2y d\u1ef1ng tr\u00ean m\u00e1i nh\u00e0 y\u00eau c\u1ea7u<\/li>\n<\/ul>\n<p><strong>Trong ho\u1ea1t \u0111\u1ed9ng b\u00ecnh th\u01b0\u1eddng:<\/strong> c\u00e1c c\u00f4ng t\u1eafc c\u00e1ch ly v\u1eabn \u0111\u00f3ng. Ch\u00fang th\u1ee5 \u0111\u1ed9ng cho \u0111\u1ebfn khi m\u1ed9t ng\u01b0\u1eddi v\u1eadn h\u00e0nh ch\u00fang. C\u00e1c b\u1ed9 ng\u1eaft m\u1ea1ch ho\u1eb7c c\u1ea7u ch\u00ec x\u1eed l\u00fd b\u1ea3o v\u1ec7 t\u1ef1 \u0111\u1ed9ng.<\/p>\n<p><strong>Trong qu\u00e1 tr\u00ecnh x\u1ea3y ra l\u1ed7i tr\u00ean m\u1ed9t chu\u1ed7i:<\/strong> thi\u1ebft b\u1ecb b\u1ea3o v\u1ec7 qu\u00e1 d\u00f2ng c\u00f3 li\u00ean quan ho\u1ea1t \u0111\u1ed9ng t\u1ef1 \u0111\u1ed9ng. D\u00f2ng \u0111i\u1ec7n ng\u01b0\u1ee3c t\u1eeb c\u00e1c chu\u1ed7i c\u00f2n l\u1ea1i b\u1ecb gi\u00e1n \u0111o\u1ea1n \u0111\u1ee7 nhanh \u0111\u1ec3 b\u1ea3o v\u1ec7 c\u00e1c d\u00e2y d\u1eabn b\u1ecb \u1ea3nh h\u01b0\u1edfng. B\u1ed9 c\u00e1ch ly \u0111\u1ea7u ra b\u1ed9 k\u1ebft h\u1ee3p v\u1eabn \u0111\u00f3ng tr\u1eeb khi c\u1ea7n b\u1ea3o tr\u00ec.<\/p>\n<p><strong>Trong qu\u00e1 tr\u00ecnh b\u1ea3o tr\u00ec theo l\u1ecbch tr\u00ecnh:<\/strong> k\u1ef9 thu\u1eadt vi\u00ean m\u1edf v\u00e0 kh\u00f3a b\u1ed9 c\u00e1ch ly \u0111\u1ea7u ra b\u1ed9 k\u1ebft h\u1ee3p, x\u00e1c minh tr\u1ea1ng th\u00e1i ng\u1eaft k\u1ebft n\u1ed1i theo quy tr\u00ecnh b\u1ea3o tr\u00ec, v\u00e0 sau \u0111\u00f3 c\u00e1ch ly ph\u1ea7n c\u00f2n l\u1ea1i c\u1ee7a h\u1ed9p theo y\u00eau c\u1ea7u cho c\u00f4ng vi\u1ec7c c\u1ee5 th\u1ec3.<\/p>\n<p>C\u00e1ch ti\u1ebfp c\u1eadn theo l\u1edbp n\u00e0y, b\u1ea3o v\u1ec7 t\u1ef1 \u0111\u1ed9ng t\u1eeb b\u1ed9 ng\u1eaft m\u1ea1ch ho\u1eb7c c\u1ea7u ch\u00ec v\u00e0 c\u00e1ch ly th\u1ee7 c\u00f4ng t\u1eeb c\u00f4ng t\u1eafc c\u00e1ch ly DC, l\u00e0 th\u00f4ng l\u1ec7 t\u1ed1t ti\u00eau chu\u1ea9n trong nhi\u1ec1u h\u1ec7 th\u1ed1ng l\u1eafp \u0111\u1eb7t PV th\u01b0\u01a1ng m\u1ea1i v\u00e0 quy m\u00f4 ti\u1ec7n \u00edch.<\/p>\n<h2>C\u00e1c l\u1ed7i l\u1ef1a ch\u1ecdn c\u00f4ng t\u1eafc c\u00e1ch ly DC ph\u1ed5 bi\u1ebfn trong PV n\u0103ng l\u01b0\u1ee3ng m\u1eb7t tr\u1eddi<\/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-infographic-showing-common-DC-solar-isolator-switch-selection-and-placement-mistakes.webp\" alt=\"Technical infographic showing common DC solar isolator switch selection and placement mistakes\" \/><figcaption style=\"font-style: italic; color: #555; margin-top: 10px; font-size: 0.9em;\">Ph\u00e2n t\u00edch tr\u1ef1c quan v\u1ec1 c\u00e1c l\u1ed7i l\u1ef1a ch\u1ecdn v\u00e0 v\u1ecb tr\u00ed c\u00f4ng t\u1eafc c\u00e1ch ly DC ph\u1ed5 bi\u1ebfn trong PV n\u0103ng l\u01b0\u1ee3ng m\u1eb7t tr\u1eddi, nh\u1ea5n m\u1ea1nh c\u00e1c m\u1ed1i nguy ti\u1ec1m \u1ea9n nh\u01b0 ni\u00eam phong v\u1ecf kh\u00f4ng \u0111\u00fang c\u00e1ch v\u00e0 c\u00e1c th\u00e0nh ph\u1ea7n \u0111\u01b0\u1ee3c \u0111\u00e1nh gi\u00e1 th\u1ea5p.<\/figcaption><\/figure>\n<h3>L\u1ed7i 1: S\u1eed d\u1ee5ng c\u00f4ng t\u1eafc AC cho m\u1ea1ch PV DC<\/h3>\n<p>\u0110\u00e2y l\u00e0 l\u1ed7i nguy hi\u1ec3m nh\u1ea5t v\u00e0 l\u00e0 l\u1ed7i c\u00f3 h\u1eadu qu\u1ea3 nghi\u00eam tr\u1ecdng nh\u1ea5t. C\u00e1c c\u00f4ng t\u1eafc AC d\u1ef1a v\u00e0o vi\u1ec7c d\u1eadp t\u1eaft h\u1ed3 quang b\u1eb1ng c\u00e1ch v\u01b0\u1ee3t qua \u0111i\u1ec3m kh\u00f4ng, \u0111i\u1ec1u n\u00e0y kh\u00f4ng t\u1ed3n t\u1ea1i trong c\u00e1c m\u1ea1ch DC.<\/p>\n<p><strong>Quy t\u1eafc:<\/strong> M\u1ecdi c\u00f4ng t\u1eafc c\u00e1ch ly DC trong h\u1ec7 th\u1ed1ng PV ph\u1ea3i \u0111\u01b0\u1ee3c \u0111\u00e1nh gi\u00e1 v\u00e0 ch\u1ee9ng nh\u1eadn r\u00f5 r\u00e0ng cho nhi\u1ec7m v\u1ee5 DC \u1edf \u0111i\u1ec7n \u00e1p h\u1ec7 th\u1ed1ng th\u1ef1c t\u1ebf.<\/p>\n<h3>L\u1ed7i 2: Ch\u1ecdn d\u1ef1a tr\u00ean \u0111i\u1ec7n \u00e1p danh \u0111\u1ecbnh m\u00e0 kh\u00f4ng c\u00f3 hi\u1ec7u ch\u1ec9nh nhi\u1ec7t \u0111\u1ed9 l\u1ea1nh<\/h3>\n<p>\u0110i\u1ec7n \u00e1p m\u1ea1ch h\u1edf (Voc) c\u1ee7a chu\u1ed7i PV t\u0103ng khi nhi\u1ec7t \u0111\u1ed9 m\u00f4-\u0111un gi\u1ea3m. M\u1ed9t chu\u1ed7i \u0111\u01b0\u1ee3c ch\u1ecdn ch\u1ec9 d\u1ef1a tr\u00ean \u0111i\u1ec7n \u00e1p h\u1ec7 th\u1ed1ng danh \u0111\u1ecbnh c\u00f3 th\u1ec3 v\u01b0\u1ee3t qu\u00e1 \u0111\u1ecbnh m\u1ee9c c\u1ee7a thi\u1ebft b\u1ecb trong \u0111i\u1ec1u ki\u1ec7n l\u1ea1nh.<\/p>\n<p>Lu\u00f4n t\u00ednh to\u00e1n Voc \u0111\u00e3 hi\u1ec7u ch\u1ec9nh t\u1ed1i \u0111a b\u1eb1ng c\u00e1ch s\u1eed d\u1ee5ng h\u1ec7 s\u1ed1 nhi\u1ec7t \u0111\u1ed9 c\u1ee7a b\u1ea3ng d\u1eef li\u1ec7u m\u00f4-\u0111un v\u00e0 nhi\u1ec7t \u0111\u1ed9 m\u00f4i tr\u01b0\u1eddng d\u1ef1 ki\u1ebfn th\u1ea5p nh\u1ea5t t\u1ea1i \u0111\u1ecba \u0111i\u1ec3m, sau \u0111\u00f3 ch\u1ecdn m\u1ed9t b\u1ed9 c\u00e1ch ly \u0111\u01b0\u1ee3c \u0111\u00e1nh gi\u00e1 cao h\u01a1n gi\u00e1 tr\u1ecb \u0111\u00f3.<\/p>\n<h3>L\u1ed7i 3: B\u1ecf qua v\u1ecf b\u1ecdc v\u00e0 b\u1ea3o v\u1ec7 m\u00f4i tr\u01b0\u1eddng<\/h3>\n<p>Thi\u1ebft b\u1ecb PV ngo\u00e0i tr\u1eddi ch\u1ecbu b\u1ee9c x\u1ea1 UV, m\u01b0a, b\u1ee5i, ng\u01b0ng t\u1ee5, chu k\u1ef3 nhi\u1ec7t \u0111\u1ed9 v\u00e0 \u1edf m\u1ed9t s\u1ed1 khu v\u1ef1c l\u00e0 phun mu\u1ed1i. M\u1ed9t c\u00f4ng t\u1eafc c\u00e1ch ly DC c\u00f3 x\u1ebfp h\u1ea1ng IP kh\u00f4ng \u0111\u1ea7y \u0111\u1ee7 ho\u1eb7c ni\u00eam phong v\u1ecf ch\u1ea5t l\u01b0\u1ee3ng k\u00e9m s\u1ebd xu\u1ed1ng c\u1ea5p theo th\u1eddi gian.<\/p>\n<p>\u0110\u1ed1i v\u1edbi c\u00e1c h\u1ec7 th\u1ed1ng l\u1eafp \u0111\u1eb7t PV ngo\u00e0i tr\u1eddi, nhi\u1ec1u d\u1ef1 \u00e1n s\u1eed d\u1ee5ng <strong>IP65<\/strong> l\u00e0m \u0111i\u1ec3m tham chi\u1ebfu t\u1ed1i thi\u1ec3u, v\u1edbi x\u1ebfp h\u1ea1ng cao h\u01a1n \u0111\u01b0\u1ee3c xem x\u00e9t cho c\u00e1c m\u00f4i tr\u01b0\u1eddng kh\u1eafc nghi\u1ec7t h\u01a1n.<\/p>\n<h3>L\u1ed7i 4: \u0110\u1eb7t b\u1ed9 c\u00e1ch ly \u1edf n\u01a1i n\u00f3 kh\u00f4ng th\u1ec3 h\u1ed7 tr\u1ee3 c\u00f4ng vi\u1ec7c d\u1ecbch v\u1ee5 th\u1ef1c t\u1ebf<\/h3>\n<p>M\u1ed9t c\u00f4ng t\u1eafc c\u00e1ch ly DC \u0111\u01b0\u1ee3c l\u1eafp \u0111\u1eb7t v\u1ec1 m\u1eb7t k\u1ef9 thu\u1eadt nh\u01b0ng \u0111\u01b0\u1ee3c g\u1eafn \u1edf m\u1ed9t v\u1ecb tr\u00ed kh\u00f4ng th\u1ec3 ti\u1ebfp c\u1eadn s\u1ebd kh\u00f4ng \u0111\u1ea1t \u0111\u01b0\u1ee3c m\u1ee5c \u0111\u00edch ch\u00ednh c\u1ee7a n\u00f3. Thi\u1ebft b\u1ecb t\u1ed3n t\u1ea1i \u0111\u1ec3 k\u1ef9 thu\u1eadt vi\u00ean c\u00f3 th\u1ec3 c\u00e1ch ly m\u1ea1ch DC m\u1ed9t c\u00e1ch an to\u00e0n v\u00e0 nhanh ch\u00f3ng.<\/p>\n<p>Thi\u1ebft k\u1ebf cho quy tr\u00ecnh l\u00e0m vi\u1ec7c d\u1ecbch v\u1ee5, kh\u00f4ng ch\u1ec9 l\u00e0 s\u01a1 \u0111\u1ed3 \u0111i\u1ec7n m\u1ed9t s\u1ee3i.<\/p>\n<h3>L\u1ed7i 5: Xem b\u1ed9 c\u00e1ch ly nh\u01b0 l\u00e0 Chi\u1ebfn l\u01b0\u1ee3c B\u1ea3o v\u1ec7 DC To\u00e0n di\u1ec7n<\/h3>\n<p>M\u1ed9t c\u00f4ng t\u1eafc c\u00e1ch ly DC cung c\u1ea5p s\u1ef1 c\u00e1ch ly. N\u00f3 kh\u00f4ng cung c\u1ea5p b\u1ea3o v\u1ec7 qu\u00e1 d\u00f2ng, b\u1ea3o v\u1ec7 ch\u1ed1ng s\u00e9t lan truy\u1ec1n ho\u1eb7c ph\u00e1t hi\u1ec7n l\u1ed7i ch\u1ea1m \u0111\u1ea5t.<\/p>\n<p>B\u1ed9 c\u00e1ch ly l\u00e0 m\u1ed9t l\u1edbp. N\u00f3 c\u1ea7n c\u00e1c l\u1edbp kh\u00e1c b\u00ean c\u1ea1nh n\u00f3.<\/p>\n<h3>L\u1ed7i 6: S\u1eed d\u1ee5ng c\u00e1c th\u00e0nh ph\u1ea7n ch\u1ea5t l\u01b0\u1ee3ng th\u1ea5p \u0111\u1ec3 ti\u1ebft ki\u1ec7m chi ph\u00ed<\/h3>\n<p>C\u00f4ng t\u1eafc c\u00e1ch ly DC l\u00e0 c\u00e1c thi\u1ebft b\u1ecb quan tr\u1ecdng v\u1ec1 an to\u00e0n, ph\u1ea3i ho\u1ea1t \u0111\u1ed9ng \u0111\u00e1ng tin c\u1eady trong nhi\u1ec1u n\u0103m trong m\u00f4i tr\u01b0\u1eddng ngo\u00e0i tr\u1eddi. C\u00e1c b\u1ed9 c\u00e1ch ly chi ph\u00ed th\u1ea5p, kh\u00f4ng \u0111\u01b0\u1ee3c ch\u1ee9ng nh\u1eadn ho\u1eb7c kh\u00f4ng c\u00f3 th\u01b0\u01a1ng hi\u1ec7u c\u00f3 th\u1ec3 v\u01b0\u1ee3t qua ki\u1ec3m tra l\u1eafp \u0111\u1eb7t ban \u0111\u1ea7u nh\u01b0ng s\u1ebd b\u1ecb l\u1ed7i sau \u0111\u00f3 trong qu\u00e1 tr\u00ecnh s\u1eed d\u1ee5ng.<\/p>\n<p>\u0110\u1ed1i v\u1edbi c\u00e1c th\u00e0nh ph\u1ea7n an to\u00e0n PV quan tr\u1ecdng, vi\u1ec7c ti\u1ebft ki\u1ec7m chi ph\u00ed \u0111\u01a1n v\u1ecb nh\u1ecf hi\u1ebfm khi x\u1ee9ng \u0111\u00e1ng v\u1edbi r\u1ee7i ro v\u1ec1 an to\u00e0n ho\u1eb7c b\u1ea3o h\u00e0nh.<\/p>\n<h2>Khi n\u00e0o B\u1ed9 c\u00e1ch ly Bi\u1ebfn t\u1ea7n T\u00edch h\u1ee3p H\u1ee3p l\u00fd<\/h2>\n<p>Xu h\u01b0\u1edbng s\u1eed d\u1ee5ng c\u00f4ng t\u1eafc c\u00e1ch ly DC t\u00edch h\u1ee3p bi\u1ebfn t\u1ea7n \u0111\u00e3 t\u0103ng t\u1ed1c \u1edf m\u1ed9t s\u1ed1 th\u1ecb tr\u01b0\u1eddng, \u0111\u01b0\u1ee3c th\u00fac \u0111\u1ea9y b\u1edfi c\u1ea3 d\u1eef li\u1ec7u an to\u00e0n v\u00e0 l\u1ee3i \u00edch l\u1eafp \u0111\u1eb7t th\u1ef1c t\u1ebf.<\/p>\n<p><strong>\u01afu \u0111i\u1ec3m c\u1ee7a b\u1ed9 c\u00e1ch ly t\u00edch h\u1ee3p:<\/strong><\/p>\n<ul>\n<li>\u00edt \u0111i\u1ec3m k\u1ebft n\u1ed1i v\u00e0 \u0111i\u1ec3m n\u1ed1i ngo\u00e0i tr\u1eddi l\u1ed9 ra h\u01a1n<\/li>\n<li>gi\u1ea3m s\u1ed1 l\u01b0\u1ee3ng x\u00e2m nh\u1eadp v\u00e0o v\u1ecf b\u1ecdc c\u00f3 th\u1ec3 tr\u1edf th\u00e0nh \u0111i\u1ec3m x\u00e2m nh\u1eadp h\u01a1i \u1ea9m<\/li>\n<li>c\u00e0i \u0111\u1eb7t \u0111\u01a1n gi\u1ea3n h\u00f3a v\u1edbi \u00edt th\u00e0nh ph\u1ea7n ri\u00eang bi\u1ec7t h\u01a1n \u0111\u1ec3 g\u1eafn v\u00e0 n\u1ed1i d\u00e2y<\/li>\n<li>x\u00e1c su\u1ea5t th\u1ea5p h\u01a1n c\u1ee7a m\u1ed9t s\u1ed1 ch\u1ebf \u0111\u1ed9 l\u1ed7i li\u00ean quan \u0111\u1ebfn v\u1ecf b\u1ecdc b\u1ed9 c\u00e1ch ly ngo\u00e0i tr\u1eddi \u0111\u1ed9c l\u1eadp<\/li>\n<\/ul>\n<p><strong>Khi n\u00e0o c\u1ea7n m\u1ed9t b\u1ed9 c\u00e1ch ly b\u00ean ngo\u00e0i ri\u00eang bi\u1ec7t:<\/strong><\/p>\n<ul>\n<li>c\u00e1c h\u1ec7 th\u1ed1ng c\u00f3 h\u1ed9p k\u1ebft h\u1ee3p n\u1eb1m xa bi\u1ebfn t\u1ea7n, n\u01a1i c\u1ea7n th\u00eam m\u1ed9t \u0111i\u1ec3m c\u00e1ch ly \u1edf \u0111\u1ea7u ra c\u1ee7a b\u1ed9 k\u1ebft h\u1ee3p<\/li>\n<li>c\u00e1c c\u00e0i \u0111\u1eb7t m\u00e0 bi\u1ebfn t\u1ea7n kh\u00f4ng bao g\u1ed3m b\u1ed9 c\u00e1ch ly DC t\u00edch h\u1ee3p \u0111\u00e1p \u1ee9ng y\u00eau c\u1ea7u c\u1ee7a m\u00e3 \u0111\u1ecba ph\u01b0\u01a1ng<\/li>\n<li>c\u00e1c d\u1ef1 \u00e1n y\u00eau c\u1ea7u c\u00e1ch ly ph\u00eda m\u1ea3ng theo ti\u00eau chu\u1ea9n khu v\u1ef1c<\/li>\n<li>c\u00e1c k\u1ecbch b\u1ea3n trang b\u1ecb th\u00eam ho\u1eb7c thay th\u1ebf n\u01a1i bi\u1ebfn t\u1ea7n hi\u1ec7n c\u00f3 thi\u1ebfu c\u00e1ch ly t\u00edch h\u1ee3p<\/li>\n<\/ul>\n<p>Quy\u1ebft \u0111\u1ecbnh thi\u1ebft k\u1ebf kh\u00f4ng ph\u1ea3i l\u00e0 \u201ct\u00edch h\u1ee3p so v\u1edbi b\u00ean ngo\u00e0i\u201d nh\u01b0 m\u1ed9t quy t\u1eafc chung. \u0110\u00f3 l\u00e0 v\u1ec1 vi\u1ec7c kh\u1edbp ki\u1ebfn tr\u00fac c\u00e1ch ly v\u1edbi c\u00e1c y\u00eau c\u1ea7u v\u1ec1 m\u00e3, b\u1ed1 c\u1ee5c v\u1eadt l\u00fd v\u00e0 nhu c\u1ea7u ti\u1ebfp c\u1eadn d\u1ecbch v\u1ee5 c\u1ee7a d\u1ef1 \u00e1n.<\/p>\n<h2>C\u00e1ch Ch\u1ecdn C\u00f4ng t\u1eafc C\u00e1ch ly DC Ph\u00f9 h\u1ee3p cho H\u1ec7 th\u1ed1ng PV c\u1ee7a B\u1ea1n<\/h2>\n<h3>B\u01b0\u1edbc 1: X\u00e1c \u0111\u1ecbnh \u0110i\u1ec7n \u00e1p H\u1ec7 th\u1ed1ng T\u1ed1i \u0111a<\/h3>\n<p>T\u00ednh \u0111i\u1ec7n \u00e1p h\u1edf m\u1ea1ch t\u1ed1i \u0111a c\u1ee7a chu\u1ed7i PV \u1edf nhi\u1ec7t \u0111\u1ed9 d\u1ef1 ki\u1ebfn th\u1ea5p nh\u1ea5t. \u00c1p d\u1ee5ng h\u1ec7 s\u1ed1 nhi\u1ec7t \u0111\u1ed9 c\u1ee7a nh\u00e0 s\u1ea3n xu\u1ea5t m\u00f4-\u0111un cho Voc. Ch\u1ecdn m\u1ed9t c\u00f4ng t\u1eafc c\u00e1ch ly DC \u0111\u01b0\u1ee3c \u0111\u1ecbnh m\u1ee9c b\u1eb1ng ho\u1eb7c cao h\u01a1n m\u1ee9c t\u1ed1i \u0111a \u0111\u00e3 \u0111i\u1ec1u ch\u1ec9nh n\u00e0y.<\/p>\n<h3>B\u01b0\u1edbc 2: X\u00e1c minh \u0110\u1ecbnh m\u1ee9c D\u00f2ng \u0111i\u1ec7n<\/h3>\n<p>B\u1ed9 c\u00e1ch ly ph\u1ea3i \u0111\u01b0\u1ee3c \u0111\u1ecbnh m\u1ee9c cho d\u00f2ng \u0111i\u1ec7n li\u00ean t\u1ee5c t\u1ed1i \u0111a m\u00e0 n\u00f3 s\u1ebd mang. Trong \u1ee9ng d\u1ee5ng h\u1ed9p k\u1ebft h\u1ee3p, \u0111\u00e2y c\u00f3 th\u1ec3 l\u00e0 d\u00f2ng \u0111i\u1ec7n k\u1ebft h\u1ee3p c\u1ee7a c\u00e1c chu\u1ed7i li\u00ean quan v\u1edbi bi\u00ean thi\u1ebft k\u1ebf \u00e1p d\u1ee5ng.<\/p>\n<h3>B\u01b0\u1edbc 3: X\u00e1c nh\u1eadn Danh m\u1ee5c S\u1eed d\u1ee5ng DC<\/h3>\n<p>T\u00ecm ki\u1ebfm ch\u1ee9ng nh\u1eadn cho <strong>Ti\u00eau chu\u1ea9n IEC 60947-3<\/strong> v\u1edbi m\u1ed9t danh m\u1ee5c s\u1eed d\u1ee5ng DC \u0111\u01b0\u1ee3c n\u00eau r\u00f5 r\u00e0ng, ch\u1eb3ng h\u1ea1n nh\u01b0 <strong>DC-21B<\/strong> hay <strong>DC-22B<\/strong>, t\u00f9y thu\u1ed9c v\u00e0o nhi\u1ec7m v\u1ee5 d\u1ef1 ki\u1ebfn. M\u1ed9t thi\u1ebft b\u1ecb ch\u1ec9 \u0111\u01b0\u1ee3c ch\u1ee9ng nh\u1eadn cho c\u00e1c danh m\u1ee5c s\u1eed d\u1ee5ng AC kh\u00f4ng ph\u00f9 h\u1ee3p \u0111\u1ec3 c\u00e1ch ly PV DC b\u1ea5t k\u1ec3 \u0111\u1ecbnh m\u1ee9c \u0111i\u1ec7n \u00e1p ho\u1eb7c d\u00f2ng \u0111i\u1ec7n c\u1ee7a n\u00f3.<\/p>\n<h3>B\u01b0\u1edbc 4: Gh\u00e9p B\u1ea3o v\u1ec7 V\u1ecf b\u1ecdc v\u1edbi M\u00f4i tr\u01b0\u1eddng L\u1eafp \u0111\u1eb7t<\/h3>\n<p>\u0110\u1ed1i v\u1edbi c\u00e1c c\u00e0i \u0111\u1eb7t ngo\u00e0i tr\u1eddi, h\u00e3y x\u00e1c nh\u1eadn r\u1eb1ng b\u1ea3o v\u1ec7 v\u1ecf b\u1ecdc v\u00e0 v\u1eadt li\u1ec7u ph\u00f9 h\u1ee3p v\u1edbi ti\u1ebfp x\u00fac v\u1edbi tia c\u1ef1c t\u00edm, \u0111\u1ed9 \u1ea9m, b\u1ee5i v\u00e0 c\u00e1c \u0111i\u1ec1u ki\u1ec7n m\u00f4i tr\u01b0\u1eddng th\u1ef1c t\u1ebf c\u1ee7a \u0111\u1ecba \u0111i\u1ec3m.<\/p>\n<h3>B\u01b0\u1edbc 5: X\u00e1c minh Ch\u1ee9ng nh\u1eadn v\u00e0 Tu\u00e2n th\u1ee7 Ti\u00eau chu\u1ea9n<\/h3>\n<ul>\n<li><strong>Ti\u00eau chu\u1ea9n IEC 60947-3<\/strong> cho nhi\u1ec1u th\u1ecb tr\u01b0\u1eddng qu\u1ed1c t\u1ebf<\/li>\n<li><strong>UL 98B<\/strong> cho c\u00e1c \u1ee9ng d\u1ee5ng PV \u1edf B\u1eafc M\u1ef9 n\u1ebfu c\u00f3<\/li>\n<li><strong>AS\/NZS 60947.3<\/strong> c\u00f9ng v\u1edbi <strong>Ti\u00eau chu\u1ea9n AS\/NZS 5033<\/strong> k\u1ef3 v\u1ecdng \u1edf \u00dac v\u00e0 New Zealand<\/li>\n<\/ul>\n<p>Tr\u00e1nh c\u00e1c thi\u1ebft b\u1ecb ch\u1ec9 hi\u1ec3n th\u1ecb ch\u1ee9ng nh\u1eadn AC v\u1edbi m\u1ed9t ch\u00fa th\u00edch cho r\u1eb1ng \u201cph\u00f9 h\u1ee3p cho DC\u201d. \u0110i\u1ec1u \u0111\u00f3 kh\u00f4ng t\u01b0\u01a1ng \u0111\u01b0\u01a1ng v\u1edbi th\u1eed nghi\u1ec7m v\u00e0 ch\u1ee9ng nh\u1eadn d\u00e0nh ri\u00eang cho DC.<\/p>\n<h2>C\u00e2u h\u1ecfi th\u01b0\u1eddng g\u1eb7p<\/h2>\n<h3>Ch\u1ee9c n\u0103ng ch\u00ednh c\u1ee7a m\u1ed9t c\u00f4ng t\u1eafc c\u00e1ch ly DC trong h\u1ec7 th\u1ed1ng n\u0103ng l\u01b0\u1ee3ng m\u1eb7t tr\u1eddi l\u00e0 g\u00ec?<\/h3>\n<p>Ch\u1ee9c n\u0103ng ch\u00ednh l\u00e0 cung c\u1ea5p m\u1ed9t ph\u01b0\u01a1ng ti\u1ec7n ng\u1eaft k\u1ebft n\u1ed1i DC th\u1ee7 c\u00f4ng \u0111\u1ec3 ph\u00eda PV c\u1ee7a h\u1ec7 th\u1ed1ng c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c c\u00e1ch ly \u0111\u1ec3 b\u1ea3o tr\u00ec, t\u1eaft m\u00e1y ho\u1eb7c c\u00e1c quy tr\u00ecnh kh\u1ea9n c\u1ea5p.<\/p>\n<h3>C\u00f4ng t\u1eafc c\u00e1ch ly DC c\u00f3 gi\u1ed1ng v\u1edbi b\u1ed9 ng\u1eaft m\u1ea1ch DC kh\u00f4ng?<\/h3>\n<p>Kh\u00f4ng. C\u00f4ng t\u1eafc c\u00e1ch ly DC l\u00e0 m\u1ed9t thi\u1ebft b\u1ecb c\u00e1ch ly th\u1ee7 c\u00f4ng, kh\u00f4ng c\u00f3 c\u01a1 ch\u1ebf ng\u1eaft t\u1ef1 \u0111\u1ed9ng. Aptomat DC l\u00e0 m\u1ed9t thi\u1ebft b\u1ecb b\u1ea3o v\u1ec7 qu\u00e1 d\u00f2ng t\u1ef1 \u0111\u1ed9ng, ph\u00e1t hi\u1ec7n l\u1ed7i v\u00e0 ng\u1eaft d\u00f2ng \u0111i\u1ec7n m\u00e0 kh\u00f4ng c\u1ea7n s\u1ef1 can thi\u1ec7p c\u1ee7a con ng\u01b0\u1eddi.<\/p>\n<h3>C\u00f4ng t\u1eafc c\u00e1ch ly DC n\u00ean \u0111\u01b0\u1ee3c l\u1eafp \u0111\u1eb7t \u1edf \u0111\u00e2u trong h\u1ec7 th\u1ed1ng PV?<\/h3>\n<p>V\u1ecb tr\u00ed l\u1eafp \u0111\u1eb7t ph\u1ed5 bi\u1ebfn nh\u1ea5t l\u00e0 g\u1ea7n ho\u1eb7c t\u00edch h\u1ee3p v\u1edbi bi\u1ebfn t\u1ea7n, t\u1ea1i \u0111\u1ea7u ra h\u1ed9p \u0111\u1ea5u d\u00e2y, ho\u1eb7c t\u1ea1i \u0111i\u1ec3m ng\u1eaft k\u1ebft n\u1ed1i ph\u00eda d\u00e3y theo y\u00eau c\u1ea7u c\u1ee7a quy \u0111\u1ecbnh. V\u1ecb tr\u00ed ch\u00ednh x\u00e1c ph\u1ee5 thu\u1ed9c v\u00e0o quy \u0111\u1ecbnh \u0111i\u1ec7n l\u1ef1c hi\u1ec7n h\u00e0nh, ki\u1ebfn tr\u00fac h\u1ec7 th\u1ed1ng v\u00e0 c\u00e1c y\u00eau c\u1ea7u v\u1ec1 ti\u1ebfp c\u1eadn d\u1ecbch v\u1ee5.<\/p>\n<h3>T\u00f4i c\u00f3 th\u1ec3 s\u1eed d\u1ee5ng m\u1ed9t c\u00f4ng t\u1eafc ng\u1eaft k\u1ebft n\u1ed1i AC ti\u00eau chu\u1ea9n nh\u01b0 m\u1ed9t b\u1ed9 c\u00e1ch ly DC \u0111\u01b0\u1ee3c kh\u00f4ng?<\/h3>\n<p>C\u00e1c c\u00f4ng t\u1eafc AC d\u1ef1a v\u00e0o \u0111i\u1ec3m c\u1eaft kh\u00f4ng t\u1ef1 nhi\u00ean c\u1ee7a d\u00f2ng \u0111i\u1ec7n \u0111\u1ec3 d\u1eadp t\u1eaft h\u1ed3 quang trong qu\u00e1 tr\u00ecnh chuy\u1ec3n m\u1ea1ch. M\u1ea1ch DC kh\u00f4ng c\u00f3 \u0111i\u1ec3m c\u1eaft kh\u00f4ng, do \u0111\u00f3 h\u1ed3 quang DC c\u00f3 th\u1ec3 duy tr\u00ec tr\u00ean c\u00e1c ti\u1ebfp \u0111i\u1ec3m \u0111\u1ecbnh m\u1ee9c AC. Lu\u00f4n s\u1eed d\u1ee5ng thi\u1ebft b\u1ecb \u0111\u01b0\u1ee3c \u0111\u1ecbnh m\u1ee9c v\u00e0 ch\u1ee9ng nh\u1eadn r\u00f5 r\u00e0ng cho nhi\u1ec7m v\u1ee5 DC \u1edf \u0111i\u1ec7n \u00e1p h\u1ec7 th\u1ed1ng th\u1ef1c t\u1ebf.<\/p>\n<h3>T\u1ea1i sao c\u00e1ch ly DC kh\u00f3 h\u01a1n chuy\u1ec3n m\u1ea1ch AC?<\/h3>\n<p>Do h\u1ed3 quang DC kh\u00f4ng t\u1ef1 d\u1eadp t\u1eaft theo c\u00e1ch t\u01b0\u01a1ng t\u1ef1 nh\u01b0 h\u1ed3 quang AC. Trong m\u1ea1ch AC, d\u00f2ng \u0111i\u1ec7n t\u1ef1 nhi\u00ean \u0111i qua \u0111i\u1ec3m kh\u00f4ng nhi\u1ec1u l\u1ea7n m\u1ed7i gi\u00e2y. D\u00f2ng \u0111i\u1ec7n DC ch\u1ea3y li\u00ean t\u1ee5c theo m\u1ed9t h\u01b0\u1edbng m\u00e0 kh\u00f4ng c\u00f3 \u0111i\u1ec3m c\u1eaft kh\u00f4ng, do \u0111\u00f3 kh\u1ea3 n\u0103ng \u0111\u00f3ng c\u1eaft v\u00e0 s\u1ef1 ph\u00f9 h\u1ee3p c\u1ee7a thi\u1ebft b\u1ecb tr\u1edf n\u00ean quan tr\u1ecdng h\u01a1n nhi\u1ec1u.<\/p>\n<h3>C\u00f4ng t\u1eafc c\u00e1ch ly DC n\u00ean \u0111\u01b0\u1ee3c ki\u1ec3m tra bao l\u00e2u m\u1ed9t l\u1ea7n?<\/h3>\n<p>\u0110\u1ed1i v\u1edbi c\u00e1c c\u00e0i \u0111\u1eb7t PV quy m\u00f4 th\u01b0\u01a1ng m\u1ea1i v\u00e0 ti\u1ec7n \u00edch, ki\u1ec3m tra h\u00e0ng n\u0103m v\u00e0 ki\u1ec3m tra ho\u1ea1t \u0111\u1ed9ng l\u00e0 th\u00f4ng l\u1ec7 ph\u1ed5 bi\u1ebfn. C\u00e1c h\u1ec7 th\u1ed1ng d\u00e2n d\u1ee5ng th\u01b0\u1eddng \u0111\u01b0\u1ee3c ki\u1ec3m tra \u00edt th\u01b0\u1eddng xuy\u00ean h\u01a1n. Kho\u1ea3ng th\u1eddi gian ch\u00ednh x\u00e1c ph\u1ea3i tu\u00e2n theo ch\u01b0\u01a1ng tr\u00ecnh b\u1ea3o tr\u00ec c\u1ee7a ch\u1ee7 s\u1edf h\u1eefu, \u0111i\u1ec1u ki\u1ec7n \u0111\u1ecba \u0111i\u1ec3m v\u00e0 c\u00e1c y\u00eau c\u1ea7u \u0111\u1ecba ph\u01b0\u01a1ng.<\/p>\n<h3>T\u00f4i c\u1ea7n \u0111\u1ecbnh m\u1ee9c \u0111i\u1ec7n \u00e1p bao nhi\u00eau cho h\u1ec7 th\u1ed1ng n\u0103ng l\u01b0\u1ee3ng m\u1eb7t tr\u1eddi 1000 V?<\/h3>\n<p>B\u1ea1n c\u1ea7n m\u1ed9t c\u00f4ng t\u1eafc c\u00e1ch ly DC c\u00f3 \u0111\u1ecbnh m\u1ee9c tr\u00ean \u0111i\u1ec7n \u00e1p h\u1edf m\u1ea1ch t\u1ed1i \u0111a c\u1ee7a chu\u1ed7i PV \u1edf nhi\u1ec7t \u0111\u1ed9 d\u1ef1 ki\u1ebfn l\u1ea1nh nh\u1ea5t, ch\u1ee9 kh\u00f4ng ch\u1ec9 \u0111i\u1ec7n \u00e1p h\u1ec7 th\u1ed1ng danh \u0111\u1ecbnh.<\/p>\n<h3>C\u00f3 ph\u1ea3i m\u1ecdi h\u1ec7 th\u1ed1ng \u0111i\u1ec7n m\u1eb7t tr\u1eddi PV \u0111\u1ec1u y\u00eau c\u1ea7u v\u1ec1 m\u1eb7t ph\u00e1p l\u00fd m\u1ed9t c\u00f4ng t\u1eafc c\u00e1ch ly DC kh\u00f4ng?<\/h3>\n<p>C\u00e1c h\u1ec7 th\u1ed1ng PV th\u01b0\u1eddng y\u00eau c\u1ea7u m\u1ed9t ph\u01b0\u01a1ng ti\u1ec7n ng\u1eaft k\u1ebft n\u1ed1i \u1edf ph\u00eda DC theo h\u1ea7u h\u1ebft c\u00e1c quy t\u1eafc \u0111i\u1ec7n, nh\u01b0ng vi\u1ec7c tri\u1ec3n khai ch\u00ednh x\u00e1c kh\u00e1c nhau t\u00f9y theo t\u1eebng khu v\u1ef1c ph\u00e1p l\u00fd. Trong m\u1ed9t s\u1ed1 c\u1ea5u h\u00ecnh h\u1ec7 th\u1ed1ng, ph\u01b0\u01a1ng ti\u1ec7n ng\u1eaft k\u1ebft n\u1ed1i c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c t\u00edch h\u1ee3p v\u00e0o c\u00e1c thi\u1ebft b\u1ecb kh\u00e1c. M\u1ed9t c\u00f4ng t\u1eafc c\u00e1ch ly DC chuy\u00ean d\u1ee5ng v\u1eabn l\u00e0 m\u1ed9t trong nh\u1eefng c\u00e1ch ti\u1ebfp c\u1eadn r\u00f5 r\u00e0ng v\u00e0 \u0111\u01b0\u1ee3c ch\u1ea5p nh\u1eadn r\u1ed9ng r\u00e3i nh\u1ea5t.<\/p>\n<h3>Li\u1ec7u t\u00ednh n\u0103ng ng\u1eaft m\u1ea1ch nhanh theo ti\u00eau chu\u1ea9n NEC c\u00f3 thay th\u1ebf \u0111\u01b0\u1ee3c nhu c\u1ea7u s\u1eed d\u1ee5ng b\u1ed9 c\u00e1ch ly DC kh\u00f4ng?<\/h3>\n<p>Kh\u00f4ng. T\u1eaft m\u00e1y nhanh theo NEC 690.12 v\u00e0 c\u00e1ch ly DC kh\u00f4ng ho\u00e0n to\u00e0n ph\u1ee5c v\u1ee5 c\u00f9ng m\u1ed9t m\u1ee5c \u0111\u00edch. T\u1eaft m\u00e1y nhanh l\u00e0 v\u1ec1 gi\u1ea3m nguy c\u01a1 \u0111i\u1ec7n gi\u1eadt tr\u00ean c\u00e1c d\u00e2y d\u1eabn \u0111\u01b0\u1ee3c ch\u1ec9 \u0111\u1ecbnh trong h\u1ec7 th\u1ed1ng PV g\u1eafn tr\u00ean t\u00f2a nh\u00e0. M\u1ed9t b\u1ed9 c\u00e1ch ly DC ho\u1eb7c ph\u01b0\u01a1ng ti\u1ec7n ng\u1eaft k\u1ebft n\u1ed1i kh\u00e1c v\u1eabn ph\u00f9 h\u1ee3p v\u1edbi vi\u1ec7c c\u00e1ch ly b\u1ea3o tr\u00ec c\u1ee5c b\u1ed9 v\u00e0 quy tr\u00ecnh d\u1ecbch v\u1ee5 tr\u1eeb khi b\u1ed1 tr\u00ed thi\u1ebft b\u1ecb t\u1ed5ng th\u1ec3 bao g\u1ed3m r\u00f5 r\u00e0ng vai tr\u00f2 \u0111\u00f3.<\/p>\n<h2>Ngu\u1ed3n v\u00e0 Ti\u00eau chu\u1ea9n Tham kh\u1ea3o<\/h2>\n<ul>\n<li><a href=\"https:\/\/docinfofiles.nfpa.org\/files\/AboutTheCodes\/70\/70_A2025_NEC_P04_PISubmittals.pdf\" rel=\"nofollow noopener\" target=\"_blank\">NEC \u0110i\u1ec1u 690.13 \u2014 Ph\u01b0\u01a1ng ti\u1ec7n Ng\u1eaft k\u1ebft n\u1ed1i H\u1ec7 th\u1ed1ng Quang \u0111i\u1ec7n (NFPA)<\/a><\/li>\n<li><a href=\"https:\/\/docinfofiles.nfpa.org\/files\/AboutTheCodes\/70\/70_A2025_NEC_P04_PISubmittals.pdf\" rel=\"nofollow noopener\" target=\"_blank\">NEC \u0110i\u1ec1u 690.12 \u2014 T\u1eaft nhanh H\u1ec7 th\u1ed1ng PV tr\u00ean c\u00e1c T\u00f2a nh\u00e0 (t\u00e0i li\u1ec7u NFPA)<\/a><\/li>\n<li><a href=\"https:\/\/www.energysafe.vic.gov.au\/about-us\/regulatory-framework\/consultations\/safety-dc-isolators-pv-systems\" rel=\"nofollow noopener\" target=\"_blank\">Energy Safe Victoria \u2014 An to\u00e0n c\u1ee7a B\u1ed9 c\u00e1ch ly DC trong H\u1ec7 th\u1ed1ng PV<\/a><\/li>\n<li><a href=\"https:\/\/www.energysafe.vic.gov.au\/industry-guidance\/electrical\/installations-and-infrastructure\/pv-dc-isolators-and-systems\" rel=\"nofollow noopener\" target=\"_blank\">Energy Safe Victoria \u2014 H\u01b0\u1edbng d\u1eabn v\u1ec1 B\u1ed9 c\u00e1ch ly v\u00e0 H\u1ec7 th\u1ed1ng PV DC<\/a><\/li>\n<li><a href=\"https:\/\/webstore.iec.ch\/en\/publication\/62839\" rel=\"nofollow noopener\" target=\"_blank\">IEC 60947-3 \u2014 Thi\u1ebft b\u1ecb \u0111\u00f3ng c\u1eaft \u0111i\u1ec7n \u00e1p th\u1ea5p: C\u00f4ng t\u1eafc, B\u1ed9 ng\u1eaft k\u1ebft n\u1ed1i, C\u00f4ng t\u1eafc-B\u1ed9 ng\u1eaft k\u1ebft n\u1ed1i<\/a><\/li>\n<li><a href=\"https:\/\/www.shopulstandards.com\/ProductDetail.aspx?UniqueKey=30658\" rel=\"nofollow noopener\" target=\"_blank\">UL 98B \u2014 C\u00f4ng t\u1eafc K\u00edn v\u00e0 M\u1eb7t tr\u01b0\u1edbc Ch\u1ebft \u0111\u1ec3 S\u1eed d\u1ee5ng trong H\u1ec7 th\u1ed1ng Quang \u0111i\u1ec7n<\/a><\/li>\n<li><a href=\"https:\/\/www.standards.org.au\/\" rel=\"nofollow noopener\" target=\"_blank\">AS\/NZS 5033 \u2014 Y\u00eau c\u1ea7u L\u1eafp \u0111\u1eb7t v\u00e0 An to\u00e0n cho M\u1ea3ng Quang \u0111i\u1ec7n<\/a><\/li>\n<\/ul>\n<\/div>\n<div class=\"simg-pop-btn\" style=\"top: 336px; left: 14px; display: none;\"><\/div>\n<div class=\"simg-pop-btn\" style=\"top: 336px; left: 14px; display: none;\"><\/div>","protected":false},"excerpt":{"rendered":"<p>A DC isolator switch is a manually operated disconnect device used in photovoltaic (PV) systems to safely isolate the DC side of an installation for maintenance, servicing, emergency response, and shutdown procedures. It creates a deliberate, clearly indicated disconnection point between solar panels and downstream equipment such as combiner boxes, charge controllers, and inverters. In [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":15086,"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-15085","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\/15085","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=15085"}],"version-history":[{"count":1,"href":"https:\/\/test.viox.com\/vi\/wp-json\/wp\/v2\/posts\/15085\/revisions"}],"predecessor-version":[{"id":23387,"href":"https:\/\/test.viox.com\/vi\/wp-json\/wp\/v2\/posts\/15085\/revisions\/23387"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/test.viox.com\/vi\/wp-json\/wp\/v2\/media\/15086"}],"wp:attachment":[{"href":"https:\/\/test.viox.com\/vi\/wp-json\/wp\/v2\/media?parent=15085"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/test.viox.com\/vi\/wp-json\/wp\/v2\/categories?post=15085"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/test.viox.com\/vi\/wp-json\/wp\/v2\/tags?post=15085"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}