{"id":20830,"date":"2025-12-14T23:27:25","date_gmt":"2025-12-14T15:27:25","guid":{"rendered":"https:\/\/viox.com\/?p=20830"},"modified":"2025-12-14T23:29:45","modified_gmt":"2025-12-14T15:29:45","slug":"solar-combiner-box-sizing-guide-expansion","status":"publish","type":"post","link":"https:\/\/test.viox.com\/vi\/solar-combiner-box-sizing-guide-expansion\/","title":{"rendered":"C\u00e1ch T\u00ednh To\u00e1n K\u00edch Th\u01b0\u1edbc H\u1ed9p T\u1ed5 H\u1ee3p N\u0103ng L\u01b0\u1ee3ng M\u1eb7t Tr\u1eddi \u0110\u1ec3 M\u1edf R\u1ed9ng Chu\u1ed7i Trong T\u01b0\u01a1ng Lai"},"content":{"rendered":"<div class=\"product-intro\">\n<h2>Gi\u1edbi thi\u1ec7u<\/h2>\n<p>Khi thi\u1ebft k\u1ebf c\u00e1c c\u00f4ng tr\u00ecnh \u0111i\u1ec7n m\u1eb7t tr\u1eddi, m\u1ed9t v\u00e0i quy\u1ebft \u0111\u1ecbnh mang l\u1ea1i t\u00e1c \u0111\u1ed9ng l\u00e2u d\u00e0i nh\u01b0 vi\u1ec7c \u0111\u1ecbnh c\u1ee1 h\u1ed9p \u0111\u1ea5u d\u00e2y (combiner box) n\u0103ng l\u01b0\u1ee3ng m\u1eb7t tr\u1eddi m\u1ed9t c\u00e1ch ph\u00f9 h\u1ee3p. \u0110i\u1ec3m n\u1ed1i quan tr\u1ecdng n\u00e0y t\u1eadp h\u1ee3p nhi\u1ec1u chu\u1ed7i PV th\u00e0nh m\u1ed9t \u0111\u1ea7u ra d\u00f2ng \u0111i\u1ec7n cao h\u01a1n duy nh\u1ea5t\u2014v\u00e0 vi\u1ec7c \u0111\u1ecbnh c\u1ee1 thi\u1ebfu n\u00f3 ngay h\u00f4m nay c\u00f3 th\u1ec3 bu\u1ed9c ph\u1ea3i thay th\u1ebf thi\u1ebft b\u1ecb t\u1ed1n k\u00e9m khi b\u1ea1n s\u1eb5n s\u00e0ng m\u1edf r\u1ed9ng v\u00e0o ng\u00e0y mai. Theo d\u1eef li\u1ec7u th\u1ef1c t\u1ebf t\u1eeb c\u00e1c nh\u00e0 th\u1ea7u \u0111i\u1ec7n m\u1eb7t tr\u1eddi th\u01b0\u01a1ng m\u1ea1i, g\u1ea7n 40% c\u00e1c d\u1ef1 \u00e1n m\u1edf r\u1ed9ng ph\u1ea3i \u0111\u1ed1i m\u1eb7t v\u1edbi s\u1ef1 ch\u1eadm tr\u1ec5 ho\u1eb7c v\u01b0\u1ee3t qu\u00e1 chi ph\u00ed v\u00ec h\u1ed9p \u0111\u1ea5u d\u00e2y ban \u0111\u1ea7u thi\u1ebfu c\u00f4ng su\u1ea5t ph\u00f9 h\u1ee3p cho c\u00e1c chu\u1ed7i b\u1ed5 sung.<\/p>\n<p>Tin t\u1ed1t l\u00e0: v\u1edbi vi\u1ec7c l\u1eadp k\u1ebf ho\u1ea1ch c\u00f3 h\u1ec7 th\u1ed1ng v\u00e0 \u00e1p d\u1ee5ng \u0111\u00fang c\u00e1c y\u00eau c\u1ea7u c\u1ee7a \u0110i\u1ec1u 690 trong NEC, b\u1ea1n c\u00f3 th\u1ec3 \u0111\u1ecbnh c\u1ee1 h\u1ed9p \u0111\u1ea5u d\u00e2y n\u0103ng l\u01b0\u1ee3ng m\u1eb7t tr\u1eddi ph\u00f9 h\u1ee3p v\u1edbi c\u1ea3 c\u00f4ng tr\u00ecnh hi\u1ec7n t\u1ea1i v\u00e0 vi\u1ec7c b\u1ed5 sung chu\u1ed7i trong t\u01b0\u01a1ng lai m\u00e0 kh\u00f4ng c\u1ea7n thi\u1ebft k\u1ebf th\u1eeba ho\u1eb7c l\u00e3ng ph\u00ed ng\u00e2n s\u00e1ch. H\u01b0\u1edbng d\u1eabn n\u00e0y tr\u00ecnh b\u00e0y m\u1ed9t ph\u01b0\u01a1ng ph\u00e1p t\u1eebng b\u01b0\u1edbc \u0111\u00e3 \u0111\u01b0\u1ee3c ch\u1ee9ng minh, c\u00e2n b\u1eb1ng gi\u1eefa c\u00e1c th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt t\u1ee9c th\u1eddi v\u1edbi t\u00ednh linh ho\u1ea1t m\u1edf r\u1ed9ng\u2014\u0111\u1ea3m b\u1ea3o h\u1ec7 th\u1ed1ng PV c\u1ee7a b\u1ea1n c\u00f3 th\u1ec3 ph\u00e1t tri\u1ec3n hi\u1ec7u qu\u1ea3 t\u1eeb 12 chu\u1ed7i l\u00ean 20 ho\u1eb7c h\u01a1n m\u00e0 kh\u00f4ng c\u1ea7n l\u00e0m l\u1ea1i to\u00e0n b\u1ed9 ki\u1ebfn tr\u00fac DC.<\/p>\n<figure style=\"margin: 20px 0; text-align: center;\"><img decoding=\"async\" style=\"max-width: 100%; height: auto;\" src=\"https:\/\/img.viox.com\/viox-solar-combiner-box-installed-in-commercial-solar-farm-with-multiple-string-inputs-outdoor-weatherproof-enclosure-mounted-near-photovoltaic-array-showing-expansion-capacity-for-future-pv-system-growth.webp\" alt=\"VIOX solar combiner box installed in commercial solar farm with multiple string inputs, outdoor weatherproof enclosure mounted near photovoltaic array showing expansion capacity for future PV system growth\" \/><figcaption style=\"font-style: italic; font-size: 0.9em; color: #666; margin-top: 8px;\">H\u1ed9p \u0111\u1ea5u d\u00e2y n\u0103ng l\u01b0\u1ee3ng m\u1eb7t tr\u1eddi VIOX \u0111\u01b0\u1ee3c l\u1eafp \u0111\u1eb7t trong trang tr\u1ea1i n\u0103ng l\u01b0\u1ee3ng m\u1eb7t tr\u1eddi th\u01b0\u01a1ng m\u1ea1i v\u1edbi nhi\u1ec1u \u0111\u1ea7u v\u00e0o chu\u1ed7i, v\u1ecf ch\u1ed1ng ch\u1ecbu th\u1eddi ti\u1ebft ngo\u00e0i tr\u1eddi \u0111\u01b0\u1ee3c g\u1eafn g\u1ea7n d\u00e3y quang \u0111i\u1ec7n cho th\u1ea5y kh\u1ea3 n\u0103ng m\u1edf r\u1ed9ng cho s\u1ef1 ph\u00e1t tri\u1ec3n h\u1ec7 th\u1ed1ng PV trong t\u01b0\u01a1ng lai<\/figcaption><\/figure>\n<h2>Hi\u1ec3u c\u00e1c Y\u00eau c\u1ea7u M\u1edf r\u1ed9ng<\/h2>\n<p>Tr\u01b0\u1edbc khi t\u00ednh to\u00e1n k\u00edch th\u01b0\u1edbc d\u00e2y ho\u1eb7c ch\u1ecdn v\u1ecf b\u1ecdc, b\u1ea1n c\u1ea7n c\u00f3 m\u1ed9t h\u00ecnh dung r\u00f5 r\u00e0ng v\u1ec1 c\u00e1ch d\u00e3y PV c\u1ee7a b\u1ea1n c\u00f3 th\u1ec3 ph\u00e1t tri\u1ec3n. C\u00e1c d\u1ef1 \u00e1n n\u0103ng l\u01b0\u1ee3ng m\u1eb7t tr\u1eddi quy m\u00f4 th\u01b0\u01a1ng m\u1ea1i v\u00e0 ti\u1ec7n \u00edch th\u01b0\u1eddng \u0111\u01b0\u1ee3c tri\u1ec3n khai theo t\u1eebng giai \u0111o\u1ea1n\u2014l\u1eafp \u0111\u1eb7t 60% c\u00f4ng su\u1ea5t d\u1ef1 ki\u1ebfn trong n\u0103m \u0111\u1ea7u ti\u00ean v\u00e0 d\u00e0nh \u0111\u1ea5t, ph\u00e2n b\u1ed5 k\u1ebft n\u1ed1i v\u00e0 c\u01a1 s\u1edf h\u1ea1 t\u1ea7ng \u0111i\u1ec7n cho c\u00e1c l\u1ea7n x\u00e2y d\u1ef1ng trong t\u01b0\u01a1ng lai. C\u00e1c c\u00f4ng tr\u00ecnh l\u1eafp \u0111\u1eb7t tr\u00ean m\u00e1i nh\u00e0 d\u00e2n d\u1ee5ng c\u0169ng m\u1edf r\u1ed9ng khi ch\u1ee7 nh\u00e0 th\u00eam xe \u0111i\u1ec7n ho\u1eb7c h\u1ec7 th\u1ed1ng l\u01b0u tr\u1eef pin, t\u1ea1o ra nhu c\u1ea7u v\u1ec1 c\u00e1c m\u1ea1ch chu\u1ed7i b\u1ed5 sung.<\/p>\n<p>L\u1eadp k\u1ebf ho\u1ea1ch m\u1edf r\u1ed9ng hi\u1ec7u qu\u1ea3 b\u1eaft \u0111\u1ea7u b\u1eb1ng d\u1ef1 b\u00e1o th\u1ef1c t\u1ebf. H\u00e3y t\u1ef1 h\u1ecfi: B\u1ea1n s\u1ebd th\u00eam c\u00e1c chu\u1ed7i trong v\u00f2ng 12 th\u00e1ng hay \u0111\u00e2y l\u00e0 m\u1ed9t t\u1ea7m nh\u00ecn 5 n\u0103m? C\u00e1c m\u00f4-\u0111un trong t\u01b0\u01a1ng lai c\u00f3 c\u00f9ng th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt \u0111i\u1ec7n hay b\u1ea1n s\u1ebd \u00e1p d\u1ee5ng c\u00e1c t\u1ea5m hai m\u1eb7t c\u00f3 d\u00f2ng \u0111i\u1ec7n cao h\u01a1n? Hi\u1ec3u \u0111\u01b0\u1ee3c nh\u1eefng y\u1ebfu t\u1ed1 th\u00fac \u0111\u1ea9y n\u00e0y s\u1ebd x\u00e1c \u0111\u1ecbnh xem b\u1ea1n c\u1ea7n hai v\u1ecb tr\u00ed \u0111\u1ea7u v\u00e0o b\u1ed5 sung hay t\u00e1m v\u1ecb tr\u00ed v\u00e0 li\u1ec7u \u0111\u1ecbnh m\u1ee9c d\u00f2ng \u0111i\u1ec7n nh\u00e1nh c\u1ee7a b\u1ea1n c\u00f3 ph\u1ea3i \u0111\u00e1p \u1ee9ng c\u00e1c chu\u1ed7i 10A ng\u00e0y nay hay c\u00e1c m\u00f4-\u0111un 15A trong t\u01b0\u01a1ng lai hay kh\u00f4ng. M\u00f4 h\u00ecnh t\u00e0i ch\u00ednh th\u01b0\u1eddng cho th\u1ea5y r\u1eb1ng vi\u1ec7c mua m\u1ed9t h\u1ed9p \u0111\u1ea5u d\u00e2y v\u1edbi 20\u201324 v\u1ecb tr\u00ed ngay h\u00f4m nay\u2014ngay c\u1ea3 khi b\u1ea1n ch\u1ec9 s\u1eed d\u1ee5ng 12\u2014s\u1ebd t\u1ed1n \u00edt chi ph\u00ed h\u01a1n nhi\u1ec1u so v\u1edbi vi\u1ec7c thay th\u1ebf m\u1ed9t thi\u1ebft b\u1ecb c\u00f3 k\u00edch th\u01b0\u1edbc kh\u00f4ng ph\u00f9 h\u1ee3p v\u00e0o gi\u1eefa d\u1ef1 \u00e1n, tr\u00e1nh th\u1eddi gian ng\u1eebng ho\u1ea1t \u0111\u1ed9ng, nh\u00e2n c\u00f4ng v\u00e0 s\u1eeda \u0111\u1ed5i gi\u1ea5y ph\u00e9p.<\/p>\n<h2>C\u00e1c Th\u00f4ng s\u1ed1 \u0110\u1ecbnh c\u1ee1 Quan tr\u1ecdng cho H\u1ed9p \u0110\u1ea5u D\u00e2y N\u0103ng L\u01b0\u1ee3ng M\u1eb7t Tr\u1eddi<\/h2>\n<p>Vi\u1ec7c \u0111\u1ecbnh c\u1ee1 h\u1ed9p \u0111\u1ea5u d\u00e2y th\u00e0nh c\u00f4ng ph\u1ee5 thu\u1ed9c v\u00e0o b\u1ed1n th\u00f4ng s\u1ed1 \u0111i\u1ec7n v\u00e0 c\u01a1 b\u1ea3n. M\u1ed7i th\u00f4ng s\u1ed1 ph\u1ea3i \u0111\u01b0\u1ee3c t\u00ednh to\u00e1n cho c\u1ea3 c\u00f4ng tr\u00ecnh hi\u1ec7n t\u1ea1i v\u00e0 d\u1ef1 ki\u1ebfn m\u1edf r\u1ed9ng c\u1ee7a b\u1ea1n \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o tu\u00e2n th\u1ee7 quy \u0111\u1ecbnh v\u00e0 v\u1eadn h\u00e0nh an to\u00e0n.<\/p>\n<p><strong>D\u00f2ng \u0111i\u1ec7n Chu\u1ed7i T\u1ed1i \u0111a (Isc \u00d7 1.25):<\/strong> Theo NEC 690.8(A), b\u1ea1n ph\u1ea3i \u0111\u1ecbnh c\u1ee1 c\u00e1c m\u1ea1ch \u0111\u1ec3 x\u1eed l\u00fd d\u00f2ng \u0111i\u1ec7n ng\u1eafn m\u1ea1ch (Isc) c\u1ee7a m\u00f4-\u0111un nh\u00e2n v\u1edbi 1.25 \u0111\u1ec3 t\u00ednh \u0111\u1ebfn s\u1ef1 thay \u0111\u1ed5i b\u1ee9c x\u1ea1. V\u00ed d\u1ee5: m\u1ed9t m\u00f4-\u0111un \u0111\u01b0\u1ee3c \u0111\u1ecbnh m\u1ee9c \u1edf 11A Isc t\u1ea1o ra d\u00f2ng \u0111i\u1ec7n m\u1ea1ch t\u1ed1i \u0111a l\u00e0 13.75A. H\u1ec7 s\u1ed1 n\u00e0y \u00e1p d\u1ee5ng cho m\u1ecdi chu\u1ed7i v\u00e0 t\u1ed5ng k\u1ebft h\u1ee3p x\u00e1c \u0111\u1ecbnh c\u00e1c y\u00eau c\u1ea7u v\u1ec1 thanh c\u00e1i \u0111\u1ea7u ra c\u1ee7a h\u1ed9p \u0111\u1ea5u d\u00e2y c\u1ee7a b\u1ea1n.<\/p>\n<p><strong>S\u1ed1 l\u01b0\u1ee3ng V\u1ecb tr\u00ed \u0110\u1ea7u v\u00e0o:<\/strong> \u0110\u00e2y l\u00e0 s\u1ed1 l\u01b0\u1ee3ng c\u00e1c \u0111\u1ea7u n\u1ed1i v\u1eadt l\u00fd ho\u1eb7c gi\u00e1 \u0111\u1ee1 c\u1ea7u ch\u00ec b\u00ean trong h\u1ed9p \u0111\u1ea5u d\u00e2y n\u0103ng l\u01b0\u1ee3ng m\u1eb7t tr\u1eddi\u2014m\u1ed9t cho m\u1ed7i chu\u1ed7i. N\u1ebfu b\u1ea1n \u0111ang l\u1eafp \u0111\u1eb7t 12 chu\u1ed7i ng\u00e0y h\u00f4m nay nh\u01b0ng d\u1ef1 \u0111\u1ecbnh \u0111\u1ea1t 18 trong v\u00f2ng ba n\u0103m, h\u00e3y ch\u1ec9 \u0111\u1ecbnh \u00edt nh\u1ea5t 18 v\u1ecb tr\u00ed. Nhi\u1ec1u nh\u00e0 s\u1ea3n xu\u1ea5t cung c\u1ea5p c\u00e1c d\u00f2ng s\u1ea3n ph\u1ea9m m\u00f4-\u0111un (16\/18\/20\/24 \u0111\u1ea7u v\u00e0o) trong c\u00f9ng m\u1ed9t k\u00edch th\u01b0\u1edbc v\u1ecf b\u1ecdc, gi\u00fap vi\u1ec7c s\u1eed d\u1ee5ng trong t\u01b0\u01a1ng lai tr\u1edf n\u00ean \u0111\u01a1n gi\u1ea3n m\u00e0 kh\u00f4ng c\u1ea7n thay th\u1ebf to\u00e0n b\u1ed9.<\/p>\n<p><strong>C\u01b0\u1eddng \u0111\u1ed9 d\u00f2ng \u0111i\u1ec7n c\u1ee7a Thanh c\u00e1i v\u00e0 \u0110\u1ea7u n\u1ed1i:<\/strong> Thanh c\u00e1i thu th\u1eadp c\u00e1c d\u00f2ng \u0111i\u1ec7n chu\u1ed7i song song v\u00e0 c\u1ea5p v\u00e0o m\u1ea1ch \u0111\u1ea7u ra PV. Theo NEC 690.8(B), b\u1ea1n ph\u1ea3i \u0111\u1ecbnh c\u1ee1 d\u00e2y d\u1eabn \u00edt nh\u1ea5t 125% d\u00f2ng \u0111i\u1ec7n li\u00ean t\u1ee5c t\u1ed1i \u0111a, sau \u0111\u00f3 \u00e1p d\u1ee5ng c\u00e1c h\u1ec7 s\u1ed1 gi\u1ea3m \u0111\u1ecbnh m\u1ee9c nhi\u1ec7t \u0111\u1ed9 v\u00e0 l\u1eafp \u0111\u1eb7t. M\u1ed9t h\u1ed9p \u0111\u1ea5u d\u00e2y h\u1ed7 tr\u1ee3 12 chu\u1ed7i \u1edf 13.75A m\u1ed7i chu\u1ed7i t\u1ea1o ra 165A k\u1ebft h\u1ee3p, y\u00eau c\u1ea7u c\u01b0\u1eddng \u0111\u1ed9 d\u00f2ng \u0111i\u1ec7n c\u1ee7a d\u00e2y d\u1eabn kho\u1ea3ng 206A tr\u01b0\u1edbc khi \u0111i\u1ec1u ch\u1ec9nh m\u00f4i tr\u01b0\u1eddng.<\/p>\n<p><strong>Dung l\u01b0\u1ee3ng Nhi\u1ec7t c\u1ee7a V\u1ecf b\u1ecdc:<\/strong> H\u1ed9p \u0111\u1ea5u d\u00e2y n\u0103ng l\u01b0\u1ee3ng m\u1eb7t tr\u1eddi ho\u1ea1t \u0111\u1ed9ng ngo\u00e0i tr\u1eddi, th\u01b0\u1eddng xuy\u00ean d\u01b0\u1edbi \u00e1nh n\u1eafng tr\u1ef1c ti\u1ebfp v\u1edbi nhi\u1ec7t \u0111\u1ed9 m\u00f4i tr\u01b0\u1eddng xung quanh v\u01b0\u1ee3t qu\u00e1 40\u00b0C. Th\u00f4ng gi\u00f3 \u0111\u1ea7y \u0111\u1ee7, thi\u1ebft k\u1ebf t\u1ea3n nhi\u1ec7t v\u00e0 x\u1ebfp h\u1ea1ng IP ph\u00f9 h\u1ee3p (IP65 ho\u1eb7c IP67) ng\u0103n ng\u1eeba qu\u00e1 nhi\u1ec7t b\u00ean trong l\u00e0m suy gi\u1ea3m c\u00e1c \u0111\u1ea7u n\u1ed1i v\u00e0 \u0111\u1ea9y nhanh s\u1ef1 c\u1ed1 c\u1ee7a c\u00e1c th\u00e0nh ph\u1ea7n. Khi l\u1eadp k\u1ebf ho\u1ea1ch m\u1edf r\u1ed9ng, h\u00e3y x\u00e1c nh\u1eadn r\u1eb1ng v\u1ecf b\u1ecdc c\u00f3 th\u1ec3 x\u1eed l\u00fd s\u1ef1 gia t\u0103ng t\u1ed5n th\u1ea5t I\u00b2R khi s\u1ed1 l\u01b0\u1ee3ng chu\u1ed7i t\u0103ng l\u00ean.<\/p>\n<figure style=\"margin: 20px 0; text-align: center;\"><img decoding=\"async\" style=\"max-width: 100%; height: auto;\" src=\"https:\/\/img.viox.com\/technical-cutaway-diagram-of-viox-solar-combiner-box-showing-internal-architecture-with-string-input-terminals-fuses-busbars-and-future-expansion-positions-for-scalable-pv-installations.webp\" alt=\"Technical cutaway diagram of VIOX solar combiner box showing internal architecture with string input terminals, fuses, busbars, and future expansion positions for scalable PV installations\" \/><figcaption style=\"font-style: italic; font-size: 0.9em; color: #666; margin-top: 8px;\">S\u01a1 \u0111\u1ed3 c\u1eaft k\u1ef9 thu\u1eadt c\u1ee7a h\u1ed9p \u0111\u1ea5u d\u00e2y n\u0103ng l\u01b0\u1ee3ng m\u1eb7t tr\u1eddi VIOX cho th\u1ea5y ki\u1ebfn tr\u00fac b\u00ean trong v\u1edbi \u0111\u1ea7u v\u00e0o chu\u1ed7i <a href=\"https:\/\/test.viox.com\/vi\/terminal-block\/\">thi\u1ebft b\u1ecb \u0111\u1ea7u cu\u1ed1i<\/a>, c\u1ea7u ch\u00ec, <a href=\"https:\/\/test.viox.com\/vi\/busbar\/\">thanh c\u00e1i<\/a>, v\u00e0 c\u00e1c v\u1ecb tr\u00ed m\u1edf r\u1ed9ng trong t\u01b0\u01a1ng lai cho c\u00e1c c\u00f4ng tr\u00ecnh PV c\u00f3 th\u1ec3 m\u1edf r\u1ed9ng<\/figcaption><\/figure>\n<h2>B\u01b0\u1edbc 1: T\u00ednh to\u00e1n C\u00e1c Y\u00eau c\u1ea7u H\u1ec7 th\u1ed1ng Hi\u1ec7n t\u1ea1i<\/h2>\n<p>B\u1eaft \u0111\u1ea7u b\u1eb1ng c\u00e1ch thi\u1ebft l\u1eadp c\u00e1c \u0111\u1eb7c t\u00ednh \u0111i\u1ec7n c\u01a1 b\u1ea3n c\u1ee7a d\u00e3y PV hi\u1ec7n c\u00f3 ho\u1eb7c ban \u0111\u1ea7u c\u1ee7a b\u1ea1n. \u0110i\u1ec1u n\u00e0y t\u1ea1o th\u00e0nh n\u1ec1n t\u1ea3ng cho t\u1ea5t c\u1ea3 c\u00e1c t\u00ednh to\u00e1n m\u1edf r\u1ed9ng ti\u1ebfp theo.<\/p>\n<p><strong>X\u00e1c \u0111\u1ecbnh \u0110i\u1ec7n \u00e1p M\u1ea1ch T\u1ed1i \u0111a (Vmax):<\/strong> S\u1eed d\u1ee5ng NEC 690.7, t\u00ednh to\u00e1n Vmax l\u00e0 \u0111i\u1ec7n \u00e1p h\u1edf m\u1ea1ch (Voc) c\u1ee7a m\u00f4-\u0111un nh\u00e2n v\u1edbi s\u1ed1 l\u01b0\u1ee3ng m\u00f4-\u0111un n\u1ed1i ti\u1ebfp v\u00e0 h\u1ec7 s\u1ed1 \u0111i\u1ec1u ch\u1ec9nh nhi\u1ec7t \u0111\u1ed9 cho m\u00f4i tr\u01b0\u1eddng l\u1ea1nh nh\u1ea5t d\u1ef1 ki\u1ebfn c\u1ee7a b\u1ea1n. V\u00ed d\u1ee5: 12 m\u00f4-\u0111un \u1edf 50V Voc trong m\u00f4i tr\u01b0\u1eddng l\u1ea1nh (h\u1ec7 s\u1ed1 1.12) t\u1ea1o ra 672 Vdc. Ch\u1ecdn \u0111\u1ecbnh m\u1ee9c \u0111i\u1ec7n \u00e1p c\u1ee7a h\u1ed9p \u0111\u1ea5u d\u00e2y v\u01b0\u1ee3t qu\u00e1 gi\u00e1 tr\u1ecb n\u00e0y\u2014th\u01b0\u1eddng l\u00e0 1000 Vdc cho c\u00e1c c\u00f4ng tr\u00ecnh th\u01b0\u01a1ng m\u1ea1i ho\u1eb7c 1500 Vdc cho c\u00e1c d\u1ef1 \u00e1n quy m\u00f4 ti\u1ec7n \u00edch.<\/p>\n<p><strong>T\u00ednh to\u00e1n D\u00f2ng \u0111i\u1ec7n Chu\u1ed7i:<\/strong> L\u1ea5y Isc c\u1ee7a b\u1ea3ng d\u1eef li\u1ec7u m\u00f4-\u0111un v\u00e0 \u00e1p d\u1ee5ng h\u1ec7 s\u1ed1 nh\u00e2n 1.25 theo NEC 690.8(A). N\u1ebfu c\u00e1c m\u00f4-\u0111un c\u1ee7a b\u1ea1n \u0111\u01b0\u1ee3c \u0111\u1ecbnh m\u1ee9c 11A Isc, d\u00f2ng \u0111i\u1ec7n chu\u1ed7i t\u1ed1i \u0111a c\u1ee7a b\u1ea1n l\u00e0 13.75A. Gi\u00e1 tr\u1ecb n\u00e0y quy \u0111\u1ecbnh \u0111\u1ecbnh m\u1ee9c t\u1ed1i thi\u1ec3u cho c\u00e1c thi\u1ebft b\u1ecb b\u1ea3o v\u1ec7 qu\u00e1 d\u00f2ng c\u1ea5p chu\u1ed7i (c\u1ea7u ch\u00ec ho\u1eb7c b\u1ed9 ng\u1eaft m\u1ea1ch) v\u00e0 dung l\u01b0\u1ee3ng d\u00f2ng \u0111i\u1ec7n nh\u00e1nh c\u1ee7a h\u1ed9p \u0111\u1ea5u d\u00e2y c\u1ee7a b\u1ea1n.<\/p>\n<p><strong>\u0110\u1ebfm S\u1ed1 l\u01b0\u1ee3ng V\u1ecb tr\u00ed \u0110\u1ea7u v\u00e0o Y\u00eau c\u1ea7u:<\/strong> \u0110\u1ed1i v\u1edbi m\u1ed9t d\u00e3y 12 chu\u1ed7i, b\u1ea1n c\u1ea7n 12 \u0111\u1ea7u n\u1ed1i \u0111\u1ea7u v\u00e0o. Tuy nhi\u00ean, h\u00e3y d\u1eebng l\u1ea1i \u1edf \u0111\u00e2y\u2014\u0111\u00e2y ch\u1ec9 l\u00e0 \u0111i\u1ec3m kh\u1edfi \u0111\u1ea7u. Ghi l\u1ea1i c\u00e1c gi\u00e1 tr\u1ecb hi\u1ec7n t\u1ea1i n\u00e0y l\u00e0m c\u01a1 s\u1edf \u0111\u1ecbnh c\u1ee1 c\u1ee7a b\u1ea1n: S\u1ed1 l\u01b0\u1ee3ng chu\u1ed7i l\u00e0 12, v\u1edbi th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt m\u00f4-\u0111un Isc \u1edf 11A. D\u00f2ng \u0111i\u1ec7n chu\u1ed7i t\u1ed1i \u0111a t\u00ednh \u0111\u01b0\u1ee3c l\u00e0 13.75A (11A \u00d7 1.25), t\u1ea1o ra d\u00f2ng \u0111i\u1ec7n d\u00e3y k\u1ebft h\u1ee3p l\u00e0 165A (12 \u00d7 13.75A). C\u00e1c y\u00eau c\u1ea7u v\u1ec1 \u0111\u1ecbnh c\u1ee1 d\u00e2y d\u1eabn li\u00ean t\u1ee5c \u0111\u1ea1t 206A (165A \u00d7 1.25 theo NEC 690.8(B)).<\/p>\n<p>Nh\u1eefng con s\u1ed1 n\u00e0y th\u1ec3 hi\u1ec7n nh\u1eefng g\u00ec b\u1ea1n c\u1ea7n ng\u00e0y h\u00f4m nay, nh\u01b0ng kh\u00f4ng ph\u1ea3i nh\u1eefng g\u00ec b\u1ea1n n\u00ean ch\u1ec9 \u0111\u1ecbnh cho m\u1ed9t h\u1ed9p \u0111\u1ea5u d\u00e2y n\u0103ng l\u01b0\u1ee3ng m\u1eb7t tr\u1eddi s\u1eb5n s\u00e0ng cho t\u01b0\u01a1ng lai.<\/p>\n<h2>B\u01b0\u1edbc 2: D\u1ef1 b\u00e1o Vi\u1ec7c B\u1ed5 sung Chu\u1ed7i Trong T\u01b0\u01a1ng lai<\/h2>\n<p>B\u00e2y gi\u1edd h\u00e3y d\u1ef1 \u0111o\u00e1n qu\u1ef9 \u0111\u1ea1o t\u0103ng tr\u01b0\u1edfng th\u1ef1c t\u1ebf c\u1ee7a h\u1ec7 th\u1ed1ng PV c\u1ee7a b\u1ea1n. B\u01b0\u1edbc n\u00e0y y\u00eau c\u1ea7u c\u00e2n b\u1eb1ng n\u0103ng l\u1ef1c k\u1ef9 thu\u1eadt v\u1edbi k\u1ebf ho\u1ea1ch kinh doanh v\u00e0 c\u00e1c h\u1ea1n ch\u1ebf c\u1ee7a \u0111\u1ecba \u0111i\u1ec3m.<\/p>\n<p><strong>X\u00e1c \u0111\u1ecbnh C\u00e1c Y\u1ebfu t\u1ed1 Th\u00fac \u0111\u1ea9y T\u0103ng tr\u01b0\u1edfng:<\/strong> C\u00e1c y\u1ebfu t\u1ed1 k\u00edch ho\u1ea1t m\u1edf r\u1ed9ng ph\u1ed5 bi\u1ebfn bao g\u1ed3m t\u00e0i tr\u1ee3 d\u1ef1 \u00e1n theo giai \u0111o\u1ea1n, di\u1ec7n t\u00edch m\u00e1i nh\u00e0 ho\u1eb7c \u0111\u1ea5t c\u00f3 s\u1eb5n, s\u1ef1 gia t\u0103ng t\u1ea3i trong t\u01b0\u01a1ng lai (s\u1ea1c xe \u0111i\u1ec7n, b\u01a1m nhi\u1ec7t) v\u00e0 t\u00edch h\u1ee3p h\u1ec7 th\u1ed1ng l\u01b0u tr\u1eef pin. C\u00e1c d\u1ef1 \u00e1n quy m\u00f4 ti\u1ec7n \u00edch th\u01b0\u1eddng l\u00ean k\u1ebf ho\u1ea1ch 2\u20133 giai \u0111o\u1ea1n x\u00e2y d\u1ef1ng trong v\u00f2ng 5 n\u0103m, trong khi c\u00e1c m\u00e1i nh\u00e0 th\u01b0\u01a1ng m\u1ea1i c\u00f3 th\u1ec3 d\u00e0nh c\u00f4ng su\u1ea5t cho m\u1ed9t l\u1ea7n m\u1edf r\u1ed9ng 30\u201340% trong v\u00f2ng hai n\u0103m.<\/p>\n<p><strong>Thi\u1ebft l\u1eadp C\u00e1c M\u1ee5c ti\u00eau v\u1ec1 S\u1ed1 l\u01b0\u1ee3ng Chu\u1ed7i:<\/strong> D\u1ef1a tr\u00ean c\u00e1c y\u1ebfu t\u1ed1 th\u00fac \u0111\u1ea9y t\u0103ng tr\u01b0\u1edfng c\u1ee7a b\u1ea1n, h\u00e3y x\u00e1c \u0111\u1ecbnh s\u1ed1 l\u01b0\u1ee3ng chu\u1ed7i t\u1ed1i \u0111a \u0111\u00e1ng tin c\u1eady. N\u1ebfu b\u1ea1n \u0111ang l\u1eafp \u0111\u1eb7t 12 chu\u1ed7i trong giai \u0111o\u1ea1n m\u1ed9t v\u00e0 \u0111\u1ecba \u0111i\u1ec3m c\u1ee7a b\u1ea1n c\u00f3 th\u1ec3 ch\u1ee9a t\u1ed5ng c\u1ed9ng 20 chu\u1ed7i, h\u00e3y l\u00ean k\u1ebf ho\u1ea1ch cho 20 v\u1ecb tr\u00ed. Tr\u00e1nh ch\u1ec9 \u0111\u1ecbnh th\u1eeba \u0111\u1ebfn 40 chu\u1ed7i tr\u1eeb khi th\u1ecfa thu\u1eadn k\u1ebft n\u1ed1i v\u00e0 gi\u1ea5y ph\u00e9p \u0111\u1ea5t c\u1ee7a b\u1ea1n h\u1ed7 tr\u1ee3 \u0111i\u1ec1u \u0111\u00f3\u2014c\u00f4ng su\u1ea5t d\u01b0 th\u1eeba t\u1ed1n ti\u1ec1n v\u00e0 l\u00e0m ph\u1ee9c t\u1ea1p vi\u1ec7c l\u1ef1a ch\u1ecdn thi\u1ebft b\u1ecb.<\/p>\n<p><strong>\u0110\u00e1nh gi\u00e1 Xu h\u01b0\u1edbng C\u00f4ng ngh\u1ec7 M\u00f4-\u0111un:<\/strong> C\u00e1c chu\u1ed7i trong t\u01b0\u01a1ng lai c\u00f3 th\u1ec3 s\u1eed d\u1ee5ng c\u00e1c m\u00f4-\u0111un kh\u00e1c nhau. C\u00e1c t\u1ea5m 10\u201311A Isc ng\u00e0y nay \u0111ang nh\u01b0\u1eddng ch\u1ed7 cho c\u00e1c t\u1ebf b\u00e0o hai m\u1eb7t, \u0111\u1ecbnh d\u1ea1ng l\u1edbn v\u1edbi \u0111\u1ecbnh m\u1ee9c 13\u201315A. N\u1ebfu b\u1ea1n d\u1ef1 ki\u1ebfn tr\u1ed9n l\u1eabn c\u00e1c th\u1ebf h\u1ec7 m\u00f4-\u0111un, h\u00e3y s\u1eed d\u1ee5ng \u0111\u1ecbnh m\u1ee9c d\u00f2ng \u0111i\u1ec7n cao h\u01a1n khi \u0111\u1ecbnh c\u1ee1 dung l\u01b0\u1ee3ng nh\u00e1nh v\u00e0 OCPD. M\u1ed9t h\u1ed9p \u0111\u1ea5u d\u00e2y \u0111\u01b0\u1ee3c \u0111\u1ecbnh m\u1ee9c cho c\u00e1c nh\u00e1nh 15A ng\u00e0y nay s\u1ebd ch\u1ea5p nh\u1eadn c\u1ea3 c\u00e1c chu\u1ed7i 11A hi\u1ec7n t\u1ea1i v\u00e0 c\u00e1c chu\u1ed7i 14A b\u1ed5 sung trong t\u01b0\u01a1ng lai m\u00e0 kh\u00f4ng c\u1ea7n s\u1eeda \u0111\u1ed5i.<\/p>\n<p>Ghi l\u1ea1i d\u1ef1 b\u00e1o m\u1edf r\u1ed9ng c\u1ee7a b\u1ea1n m\u1ed9t c\u00e1ch r\u00f5 r\u00e0ng: \u201cHi\u1ec7n t\u1ea1i: 12 chu\u1ed7i \u1edf 11A Isc. M\u1ee5c ti\u00eau: 20 chu\u1ed7i, cho ph\u00e9p t\u1ed1i \u0111a 15A Isc tr\u00ean m\u1ed7i chu\u1ed7i.\u201d \u0110i\u1ec1u n\u00e0y tr\u1edf th\u00e0nh neo th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt c\u1ee7a b\u1ea1n.<\/p>\n<figure style=\"margin: 20px 0; text-align: center;\"><img decoding=\"async\" style=\"max-width: 100%; height: auto;\" src=\"https:\/\/img.viox.com\/viox-solar-combiner-box-sizing-calculation-diagram-illustrating-nec-690-8-string-current-formulas-position-count-planning-and-conductor-ampacity-requirements-for-expandable-photovoltaic-systems.webp\" alt=\"VIOX solar combiner box sizing calculation diagram illustrating NEC 690.8 string current formulas, position count planning, and conductor ampacity requirements for expandable photovoltaic systems\" \/><figcaption style=\"font-style: italic; font-size: 0.9em; color: #666; margin-top: 8px;\">S\u01a1 \u0111\u1ed3 t\u00ednh to\u00e1n k\u00edch th\u01b0\u1edbc h\u1ed9p \u0111\u1ea5u d\u00e2y n\u0103ng l\u01b0\u1ee3ng m\u1eb7t tr\u1eddi VIOX minh h\u1ecda c\u00e1c c\u00f4ng th\u1ee9c d\u00f2ng \u0111i\u1ec7n chu\u1ed7i NEC 690.8, l\u1eadp k\u1ebf ho\u1ea1ch s\u1ed1 l\u01b0\u1ee3ng v\u1ecb tr\u00ed v\u00e0 c\u00e1c y\u00eau c\u1ea7u v\u1ec1 c\u01b0\u1eddng \u0111\u1ed9 d\u00f2ng \u0111i\u1ec7n c\u1ee7a d\u00e2y d\u1eabn cho c\u00e1c h\u1ec7 th\u1ed1ng quang \u0111i\u1ec7n c\u00f3 th\u1ec3 m\u1edf r\u1ed9ng<\/figcaption><\/figure>\n<h2>B\u01b0\u1edbc 3: \u00c1p d\u1ee5ng C\u00e1c H\u1ec7 s\u1ed1 Gi\u1ea3m \u0110\u1ecbnh m\u1ee9c v\u00e0 An to\u00e0n<\/h2>\n<p>C\u00e1c t\u00ednh to\u00e1n th\u00f4 l\u00e0 kh\u00f4ng \u0111\u1ee7\u2014vi\u1ec7c tu\u00e2n th\u1ee7 quy \u0111\u1ecbnh v\u00e0 v\u1eadn h\u00e0nh an to\u00e0n l\u00e2u d\u00e0i \u0111\u00f2i h\u1ecfi ph\u1ea3i gi\u1ea3m \u0111\u1ecbnh m\u1ee9c c\u00f3 h\u1ec7 th\u1ed1ng. B\u01b0\u1edbc n\u00e0y bi\u1ebfn d\u1ef1 b\u00e1o c\u1ee7a b\u1ea1n th\u00e0nh c\u00e1c th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt c\u00f3 th\u1ec3 b\u1ea3o v\u1ec7 \u0111\u01b0\u1ee3c.<\/p>\n<p><strong>C\u00e1c Y\u00eau c\u1ea7u v\u1ec1 D\u00f2ng \u0111i\u1ec7n Li\u00ean t\u1ee5c NEC 690.8:<\/strong> B\u1ed9 lu\u1eadt \u0110i\u1ec7n Qu\u1ed1c gia quy \u0111\u1ecbnh r\u1eb1ng d\u00e2y d\u1eabn PV v\u00e0 c\u00e1c thi\u1ebft b\u1ecb b\u1ea3o v\u1ec7 qu\u00e1 d\u00f2ng ph\u1ea3i x\u1eed l\u00fd 125% d\u00f2ng \u0111i\u1ec7n m\u1ea1ch t\u1ed1i \u0111a. \u0110i\u1ec1u n\u00e0y t\u00ednh \u0111\u1ebfn ho\u1ea1t \u0111\u1ed9ng ban ng\u00e0y li\u00ean t\u1ee5c d\u01b0\u1edbi b\u1ee9c x\u1ea1 \u0111\u1ec9nh. \u0110\u1ed1i v\u1edbi 20 chu\u1ed7i \u1edf 15A Isc m\u1ed7i chu\u1ed7i, d\u00f2ng \u0111i\u1ec7n k\u1ebft h\u1ee3p t\u1ed1i \u0111a c\u1ee7a b\u1ea1n l\u00e0 20 \u00d7 15A \u00d7 1.25 = 375A. C\u01b0\u1eddng \u0111\u1ed9 d\u00f2ng \u0111i\u1ec7n c\u1ee7a d\u00e2y d\u1eabn sau \u0111\u00f3 ph\u1ea3i \u0111\u1ea1t 375A \u00d7 1.25 = 469A tr\u01b0\u1edbc khi \u0111i\u1ec1u ch\u1ec9nh nhi\u1ec7t \u0111\u1ed9\u2014vi\u1ec7c \u00e1p d\u1ee5ng k\u00e9p 125% n\u00e0y (m\u1ed9t l\u1ea7n cho b\u1ee9c x\u1ea1, m\u1ed9t l\u1ea7n cho ho\u1ea1t \u0111\u1ed9ng li\u00ean t\u1ee5c) l\u00e0 r\u1ea5t quan tr\u1ecdng v\u00e0 th\u01b0\u1eddng b\u1ecb b\u1ecf qua.<\/p>\n<p><strong>C\u00e1c H\u1ec7 s\u1ed1 Gi\u1ea3m \u0110\u1ecbnh m\u1ee9c Nhi\u1ec7t \u0111\u1ed9:<\/strong> V\u1ecf b\u1ecdc h\u1ed9p \u0111\u1ea5u d\u00e2y ngo\u00e0i tr\u1eddi tr\u1ea3i qua qu\u00e1 tr\u00ecnh gia nhi\u1ec7t n\u0103ng l\u01b0\u1ee3ng m\u1eb7t tr\u1eddi \u0111\u00e1ng k\u1ec3. B\u1ea3ng NEC 310.15(B)(1) cung c\u1ea5p c\u00e1c h\u1ec7 s\u1ed1 \u0111i\u1ec1u ch\u1ec9nh c\u01b0\u1eddng \u0111\u1ed9 d\u00f2ng \u0111i\u1ec7n cho nhi\u1ec7t \u0111\u1ed9 m\u00f4i tr\u01b0\u1eddng xung quanh tr\u00ean 30\u00b0C. \u1ede c\u00e1c v\u00f9ng kh\u00ed h\u1eadu n\u00f3ng, n\u01a1i v\u1ecf b\u1ecdc \u0111\u1ea1t 50\u00b0C, d\u00e2y d\u1eabn \u0111\u1ed3ng c\u00f3 th\u1ec3 y\u00eau c\u1ea7u gi\u1ea3m \u0111\u1ecbnh m\u1ee9c xu\u1ed1ng 0.82 ho\u1eb7c th\u1ea5p h\u01a1n, l\u00e0m t\u0103ng k\u00edch th\u01b0\u1edbc d\u00e2y y\u00eau c\u1ea7u c\u1ee7a b\u1ea1n m\u1ed9t c\u00e1ch hi\u1ec7u qu\u1ea3. VIOX Electric ti\u1ebfn h\u00e0nh th\u1eed nghi\u1ec7m nhi\u1ec7t \u1edf m\u00f4i tr\u01b0\u1eddng xung quanh 60\u00b0C \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o c\u00e1c thi\u1ebft k\u1ebf h\u1ed9p \u0111\u1ea5u d\u00e2y n\u0103ng l\u01b0\u1ee3ng m\u1eb7t tr\u1eddi c\u1ee7a ch\u00fang t\u00f4i duy tr\u00ec t\u00ednh to\u00e0n v\u1eb9n c\u1ee7a \u0111\u1ea7u n\u1ed1i trong c\u00e1c \u0111i\u1ec1u ki\u1ec7n kh\u1eafc nghi\u1ec7t t\u1ea1i hi\u1ec7n tr\u01b0\u1eddng.<\/p>\n<p><strong>C\u00e1c \u0110\u1ec1 xu\u1ea5t v\u1ec1 Bi\u00ean \u0110\u1ed9 M\u1edf r\u1ed9ng:<\/strong> Ngo\u00e0i c\u00e1c m\u1ee9c t\u1ed1i thi\u1ec3u theo quy \u0111\u1ecbnh, c\u00e1c nh\u00e0 thi\u1ebft k\u1ebf h\u1ec7 th\u1ed1ng c\u00f3 kinh nghi\u1ec7m c\u00f2n th\u00eam b\u1ed9 \u0111\u1ec7m c\u00f4ng su\u1ea5t 20\u201330% cho s\u1ef1 t\u0103ng tr\u01b0\u1edfng kh\u00f4ng l\u01b0\u1eddng tr\u01b0\u1edbc \u0111\u01b0\u1ee3c. Bi\u00ean \u0111\u1ed9 n\u00e0y ph\u00f9 h\u1ee3p v\u1edbi nh\u1eefng thay \u0111\u1ed5i nh\u1ecf trong k\u1ebf ho\u1ea1ch\u2014ch\u1eb3ng h\u1ea1n nh\u01b0 th\u00eam hai chu\u1ed7i b\u1ed5 sung khi h\u1ec7 th\u1ed1ng pin \u0111\u1ebfn s\u1edbm h\u01a1n d\u1ef1 ki\u1ebfn\u2014m\u00e0 kh\u00f4ng c\u1ea7n m\u1edf l\u1ea1i gi\u1ea5y ph\u00e9p ho\u1eb7c t\u00ednh to\u00e1n \u0111i\u1ec7n. C\u00e1c d\u1ef1 \u00e1n th\u1eadn tr\u1ecdng nh\u1eafm m\u1ee5c ti\u00eau tu\u1ed5i th\u1ecd 15+ n\u0103m th\u01b0\u1eddng s\u1eed d\u1ee5ng bi\u00ean \u0111\u1ed9 30\u201340%, nh\u1eadn th\u1ea5y r\u1eb1ng nh\u1eefng c\u1ea3i ti\u1ebfn v\u1ec1 hi\u1ec7u su\u1ea5t m\u00f4-\u0111un c\u00f3 th\u1ec3 cho ph\u00e9p c\u00e1c d\u00e3y d\u00e0y \u0111\u1eb7c h\u01a1n.<\/p>\n<p><strong>Ph\u01b0\u01a1ng ph\u00e1p Ti\u1ebfp c\u1eadn D\u1ef1a tr\u00ean Ti\u00eau chu\u1ea9n:<\/strong> Khi k\u1ebft h\u1ee3p c\u00e1c y\u00eau c\u1ea7u c\u1ee7a NEC v\u1edbi bi\u00ean \u0111\u1ed9 th\u1ef1c t\u1ebf, th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt c\u1ee7a b\u1ea1n s\u1ebd ph\u00e1t tri\u1ec3n t\u1eeb \u201ch\u1ed7 tr\u1ee3 20 chu\u1ed7i\u201d th\u00e0nh \u201ch\u1ed7 tr\u1ee3 20 chu\u1ed7i ng\u00e0y nay v\u1edbi d\u00e2y d\u1eabn v\u00e0 thanh c\u00e1i \u0111\u01b0\u1ee3c \u0111\u1ecbnh m\u1ee9c cho d\u00f2ng \u0111i\u1ec7n t\u01b0\u01a1ng \u0111\u01b0\u01a1ng 24 chu\u1ed7i, bao g\u1ed3m t\u1ea5t c\u1ea3 c\u00e1c h\u1ec7 s\u1ed1 gi\u1ea3m \u0111\u1ecbnh m\u1ee9c.\u201d Ph\u01b0\u01a1ng ph\u00e1p k\u1ef7 lu\u1eadt n\u00e0y ng\u0103n ng\u1eeba sai l\u1ea7m ph\u1ed5 bi\u1ebfn l\u00e0 ch\u1ecdn m\u1ed9t h\u1ed9p \u0111\u1ea5u d\u00e2y c\u00f3 20 v\u1ecb tr\u00ed v\u1eadt l\u00fd nh\u01b0ng kh\u00f4ng \u0111\u1ee7 kho\u1ea3ng kh\u00f4ng nhi\u1ec7t ho\u1eb7c c\u01b0\u1eddng \u0111\u1ed9 d\u00f2ng \u0111i\u1ec7n.<\/p>\n<h2>B\u01b0\u1edbc 4: Ch\u1ecdn S\u1ed1 l\u01b0\u1ee3ng V\u1ecb tr\u00ed v\u00e0 \u0110\u1ecbnh m\u1ee9c D\u00f2ng \u0111i\u1ec7n cho H\u1ed9p \u0110\u1ea5u D\u00e2y N\u0103ng L\u01b0\u1ee3ng M\u1eb7t Tr\u1eddi c\u1ee7a B\u1ea1n<\/h2>\n<p>V\u1edbi c\u00e1c t\u00ednh to\u00e1n c\u1ee7a b\u1ea1n \u0111\u00e3 ho\u00e0n t\u1ea5t, h\u00e3y chuy\u1ec3n c\u00e1c y\u00eau c\u1ea7u k\u1ef9 thu\u1eadt th\u00e0nh c\u00e1c l\u1ef1a ch\u1ecdn s\u1ea3n ph\u1ea9m c\u1ee5 th\u1ec3. \u0110\u00e2y l\u00e0 n\u01a1i l\u1eadp k\u1ebf ho\u1ea1ch \u0111\u00e1p \u1ee9ng vi\u1ec7c mua s\u1eafm.<\/p>\n<p><strong>Ma tr\u1eadn V\u1ecb tr\u00ed \u0110\u1ea7u v\u00e0o H\u1ed9p \u0111\u1ea5u d\u00e2y:<\/strong> Gh\u00e9p s\u1ed1 l\u01b0\u1ee3ng chu\u1ed7i m\u1ee5c ti\u00eau c\u1ee7a b\u1ea1n v\u1edbi c\u00e1c d\u00f2ng s\u1ea3n ph\u1ea9m c\u00f3 s\u1eb5n. N\u1ebfu b\u1ea1n c\u1ea7n 20 v\u1ecb tr\u00ed \u0111\u1ec3 m\u1edf r\u1ed9ng trong t\u01b0\u01a1ng lai, h\u00e3y t\u00ecm c\u00e1c ki\u1ec3u h\u1ed9p \u0111\u1ea5u d\u00e2y cung c\u1ea5p 20\u201324 \u0111\u1ea7u v\u00e0o. Nhi\u1ec1u nh\u00e0 s\u1ea3n xu\u1ea5t bao g\u1ed3m VIOX Electric cung c\u1ea5p c\u00e1c d\u00f2ng s\u1ea3n ph\u1ea9m m\u00f4-\u0111un, trong \u0111\u00f3 m\u1ed9t n\u1ec1n t\u1ea3ng v\u1ecf b\u1ecdc duy nh\u1ea5t ph\u00f9 h\u1ee3p v\u1edbi nhi\u1ec1u c\u1ea5u h\u00ecnh\u201416, 18, 20 ho\u1eb7c 24 v\u1ecb tr\u00ed\u2014cho ph\u00e9p b\u1ea1n mua dung l\u01b0\u1ee3ng v\u1eadt l\u00fd b\u1ea1n c\u1ea7n m\u00e0 kh\u00f4ng c\u1ea7n thi\u1ebft k\u1ebf t\u00f9y ch\u1ec9nh. T\u00ednh m\u00f4-\u0111un n\u00e0y c\u00f3 ngh\u0129a l\u00e0 th\u1ee3 \u0111i\u1ec7n c\u1ee7a b\u1ea1n c\u00f3 th\u1ec3 th\u00eam <a href=\"https:\/\/test.viox.com\/vi\/the-complete-guide-to-fuse-holders\/\">gi\u00e1 \u0111\u1ee1 c\u1ea7u ch\u00ec<\/a> ho\u1eb7c b\u1ed9 ng\u1eaft m\u1ea1ch v\u00e0o c\u00e1c v\u1ecb tr\u00ed ch\u01b0a s\u1eed d\u1ee5ng trong giai \u0111o\u1ea1n hai m\u00e0 kh\u00f4ng c\u1ea7n th\u00e1o to\u00e0n b\u1ed9 h\u1ed9p \u0111\u1ea5u d\u00e2y.<\/p>\n<p><strong>\u0110\u1ecbnh m\u1ee9c D\u00f2ng \u0111i\u1ec7n Nh\u00e1nh:<\/strong> X\u00e1c minh r\u1eb1ng m\u1ed7i \u0111\u1ea7u n\u1ed1i \u0111\u1ea7u v\u00e0o ho\u1eb7c v\u1ecb tr\u00ed c\u1ea7u ch\u00ec h\u1ed7 tr\u1ee3 d\u00f2ng \u0111i\u1ec7n chu\u1ed7i d\u1ef1 ki\u1ebfn t\u1ed1i \u0111a c\u1ee7a b\u1ea1n. \u0110\u1ed1i v\u1edbi c\u00e1c m\u00f4-\u0111un 15A Isc, b\u1ea1n c\u1ea7n \u0111\u1ecbnh m\u1ee9c nh\u00e1nh kho\u1ea3ng 18.75A (15A \u00d7 1.25). C\u00e1c h\u1ed9p \u0111\u1ea5u d\u00e2y hi\u1ec7u su\u1ea5t cao hi\u1ec7n \u0111\u1ea1i h\u1ed7 tr\u1ee3 d\u00f2ng \u0111i\u1ec7n nh\u00e1nh l\u00ean \u0111\u1ebfn 21A, ph\u00f9 h\u1ee3p v\u1edbi c\u00e1c t\u1ea5m hai m\u1eb7t th\u1ebf h\u1ec7 ti\u1ebfp theo v\u00e0 cung c\u1ea5p kho\u1ea3ng kh\u00f4ng cho s\u1ef1 ph\u00e1t tri\u1ec3n c\u1ee7a c\u00f4ng ngh\u1ec7 m\u00f4-\u0111un. Ki\u1ec3m tra xem OCPD \u0111\u00e3 ch\u1ecdn c\u1ee7a b\u1ea1n\u2014cho d\u00f9 l\u00e0 c\u1ea7u ch\u00ec \u0111\u01b0\u1ee3c \u0111\u1ecbnh m\u1ee9c PV hay<a href=\"https:\/\/test.viox.com\/vi\/mcb\/\"> b\u1ed9 ng\u1eaft m\u1ea1ch DC<\/a>\u2014ph\u00f9 h\u1ee3p v\u1edbi c\u1ea3 \u0111\u1ecbnh m\u1ee9c nh\u00e1nh v\u00e0 th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt c\u1ea7u ch\u00ec n\u1ed1i ti\u1ebfp t\u1ed1i \u0111a c\u1ee7a m\u00f4-\u0111un.<\/p>\n<p><strong>C\u01b0\u1eddng \u0111\u1ed9 d\u00f2ng \u0111i\u1ec7n c\u1ee7a Thanh c\u00e1i \u0110\u1ea7u ra:<\/strong> X\u00e1c nh\u1eadn r\u1eb1ng t\u1ed5ng c\u00f4ng su\u1ea5t \u0111\u1ea7u ra c\u1ee7a h\u1ed9p \u0111\u1ea5u d\u00e2y \u0111\u00e1p \u1ee9ng y\u00eau c\u1ea7u d\u00f2ng \u0111i\u1ec7n \u0111\u00e3 gi\u1ea3m \u0111\u1ecbnh m\u1ee9c, \u0111\u01b0\u1ee3c m\u1edf r\u1ed9ng ho\u00e0n to\u00e0n c\u1ee7a b\u1ea1n. \u0110\u1ed1i v\u1edbi v\u00ed d\u1ee5 20 chu\u1ed7i c\u1ee7a ch\u00fang t\u00f4i v\u1edbi 469A li\u00ean t\u1ee5c (\u0111\u00e3 gi\u1ea3m \u0111\u1ecbnh m\u1ee9c), b\u1ea1n c\u1ea7n thanh c\u00e1i v\u00e0 \u0111\u1ea7u n\u1ed1i \u0111\u1ea7u ra \u0111\u01b0\u1ee3c \u0111\u1ecbnh m\u1ee9c cho 500A tr\u1edf l\u00ean. H\u1ed9p \u0111\u1ea5u d\u00e2y VIOX ch\u1ec9 \u0111\u1ecbnh c\u1ea3 \u0111\u1ecbnh m\u1ee9c thanh c\u00e1i li\u00ean t\u1ee5c v\u00e0 ng\u1eafn m\u1ea1ch, \u0111\u1ea3m b\u1ea3o v\u1eadn h\u00e0nh an to\u00e0n trong m\u1ecdi \u0111i\u1ec1u ki\u1ec7n, bao g\u1ed3m c\u1ea3 l\u1ed7i ch\u1ea1m \u0111\u1ea5t v\u00e0 kh\u00f4ng kh\u1edbp d\u00e3y.<\/p>\n<p><strong>V\u00ed d\u1ee5 S\u1ea3n ph\u1ea9m VIOX:<\/strong> H\u1ed9p \u0111\u1ea5u d\u00e2y n\u0103ng l\u01b0\u1ee3ng m\u1eb7t tr\u1eddi VIOX VSC-24-1000 cung c\u1ea5p 24 v\u1ecb tr\u00ed \u0111\u1ea7u v\u00e0o, \u0111\u1ecbnh m\u1ee9c 1000 Vdc, dung l\u01b0\u1ee3ng nh\u00e1nh 21A tr\u00ean m\u1ed7i v\u1ecb tr\u00ed v\u00e0 thanh c\u00e1i \u0111\u1ea7u ra 600A\u2014l\u00fd t\u01b0\u1edfng cho c\u00e1c c\u00f4ng tr\u00ecnh th\u01b0\u01a1ng m\u1ea1i c\u00f3 k\u1ebf ho\u1ea1ch t\u0103ng tr\u01b0\u1edfng 12\u201320 chu\u1ed7i v\u1edbi c\u00e1c m\u00f4-\u0111un d\u00f2ng \u0111i\u1ec7n cao. V\u1ecf b\u1ecdc \u0111\u01b0\u1ee3c \u0111\u1ecbnh m\u1ee9c IP67 v\u1edbi c\u00e1c t\u00ednh n\u0103ng qu\u1ea3n l\u00fd nhi\u1ec7t \u0111\u1ea3m b\u1ea3o v\u1eadn h\u00e0nh \u0111\u00e1ng tin c\u1eady trong m\u00f4i tr\u01b0\u1eddng ngo\u00e0i tr\u1eddi kh\u1eafc nghi\u1ec7t v\u00e0 thi\u1ebft k\u1ebf c\u1ea7u ch\u00ec m\u00f4-\u0111un cho ph\u00e9p s\u1eed d\u1ee5ng t\u0103ng d\u1ea7n khi d\u00e3y c\u1ee7a b\u1ea1n m\u1edf r\u1ed9ng.<\/p>\n<figure style=\"margin: 20px 0; text-align: center;\"><img decoding=\"async\" style=\"max-width: 100%; height: auto;\" src=\"https:\/\/img.viox.com\/professional-expansion-sizing-flowchart-for-viox-solar-combiner-box-showing-methodology-from-current-strings-through-derating-factors-to-final-specification-with-nec-compliance.webp\" alt=\"Professional expansion sizing flowchart for VIOX solar combiner box showing methodology from current strings through derating factors to final specification with NEC compliance\" \/><figcaption style=\"font-style: italic; font-size: 0.9em; color: #666; margin-top: 8px;\">L\u01b0u \u0111\u1ed3 \u0111\u1ecbnh c\u1ee1 m\u1edf r\u1ed9ng chuy\u00ean nghi\u1ec7p cho h\u1ed9p \u0111\u1ea5u d\u00e2y n\u0103ng l\u01b0\u1ee3ng m\u1eb7t tr\u1eddi VIOX cho th\u1ea5y ph\u01b0\u01a1ng ph\u00e1p t\u1eeb c\u00e1c chu\u1ed7i hi\u1ec7n t\u1ea1i th\u00f4ng qua c\u00e1c h\u1ec7 s\u1ed1 gi\u1ea3m \u0111\u1ecbnh m\u1ee9c \u0111\u1ebfn th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt cu\u1ed1i c\u00f9ng tu\u00e2n th\u1ee7 NEC<\/figcaption><\/figure>\n<h2>V\u00ed d\u1ee5 \u0110\u1ecbnh c\u1ee1 Th\u1ef1c t\u1ebf: T\u1eeb 12 Chu\u1ed7i \u0111\u1ebfn 20<\/h2>\n<p>H\u00e3y c\u00f9ng xem x\u00e9t m\u1ed9t k\u1ecbch b\u1ea3n th\u1ef1c t\u1ebf ho\u00e0n ch\u1ec9nh \u0111\u1ec3 c\u1ee7ng c\u1ed1 ph\u01b0\u01a1ng ph\u00e1p lu\u1eadn.<\/p>\n<p><strong>Th\u00f4ng s\u1ed1 d\u1ef1 \u00e1n:<\/strong><\/p>\n<ul>\n<li>C\u00e0i \u0111\u1eb7t hi\u1ec7n t\u1ea1i: 12 chu\u1ed7i<\/li>\n<li>M\u1edf r\u1ed9ng d\u1ef1 ki\u1ebfn: 20 chu\u1ed7i trong v\u00f2ng ba n\u0103m<\/li>\n<li>Th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt c\u1ee7a module: Voc = 50V, Isc = 11A (d\u00f2ng \u0111i\u1ec7n), d\u1ef1 ki\u1ebfn c\u00e1c module trong t\u01b0\u01a1ng lai c\u00f3 Isc = 14A<\/li>\n<li>C\u1ea5u h\u00ecnh chu\u1ed7i: 12 module m\u1eafc n\u1ed1i ti\u1ebfp<\/li>\n<li>V\u1ecb tr\u00ed: Kh\u00ed h\u1eadu n\u00f3ng, nhi\u1ec7t \u0111\u1ed9 m\u00f4i tr\u01b0\u1eddng d\u1ef1 ki\u1ebfn 50\u00b0C<\/li>\n<li>H\u1ec7 s\u1ed1 \u0111i\u1ec1u ch\u1ec9nh \u0111i\u1ec7n \u00e1p t\u1ea1i ch\u1ed7 (l\u1ea1nh): Cv = 1.12<\/li>\n<\/ul>\n<p><strong>B\u01b0\u1edbc 1 \u2013 T\u00ednh to\u00e1n y\u00eau c\u1ea7u d\u00f2ng \u0111i\u1ec7n:<\/strong><\/p>\n<ul>\n<li>Vmax = 50V \u00d7 12 module \u00d7 1.12 = 672 Vdc \u2192 Ch\u1ecdn b\u1ed9 k\u1ebft h\u1ee3p \u0111\u1ecbnh m\u1ee9c 1000 Vdc<\/li>\n<li>D\u00f2ng \u0111i\u1ec7n chu\u1ed7i Imax = 11A \u00d7 1.25 = 13.75A<\/li>\n<li>D\u00f2ng \u0111i\u1ec7n k\u1ebft h\u1ee3p Imax = 12 chu\u1ed7i \u00d7 13.75A = 165A<\/li>\n<li>Kh\u1ea3 n\u0103ng ch\u1ecbu t\u1ea3i c\u1ee7a d\u00e2y d\u1eabn (tr\u01b0\u1edbc khi gi\u1ea3m t\u1ea3i) = 165A \u00d7 1.25 = 206A<\/li>\n<\/ul>\n<p><strong>B\u01b0\u1edbc 2 \u2013 D\u1ef1 b\u00e1o m\u1edf r\u1ed9ng:<\/strong><\/p>\n<ul>\n<li>S\u1ed1 chu\u1ed7i m\u1ee5c ti\u00eau: 20<\/li>\n<li>Isc module trong t\u01b0\u01a1ng lai: 14A (\u01b0\u1edbc t\u00ednh th\u1eadn tr\u1ecdng cho c\u00f4ng ngh\u1ec7 hai m\u1eb7t\/d\u00f2ng \u0111i\u1ec7n cao)<\/li>\n<\/ul>\n<p><strong>B\u01b0\u1edbc 3 \u2013 \u00c1p d\u1ee5ng gi\u1ea3m t\u1ea3i v\u00e0 h\u1ec7 s\u1ed1 an to\u00e0n:<\/strong><\/p>\n<ul>\n<li>D\u00f2ng \u0111i\u1ec7n k\u1ebft h\u1ee3p t\u1ed1i \u0111a trong t\u01b0\u01a1ng lai = 20 \u00d7 14A \u00d7 1.25 = 350A<\/li>\n<li>Y\u00eau c\u1ea7u v\u1ec1 kh\u1ea3 n\u0103ng ch\u1ecbu t\u1ea3i c\u1ee7a d\u00e2y d\u1eabn = 350A \u00d7 1.25 = 437.5A<\/li>\n<li>\u0110i\u1ec1u ch\u1ec9nh nhi\u1ec7t \u0111\u1ed9 (50\u00b0C, B\u1ea3ng NEC 310.15) \u2248 0.82 \u0111\u1ed1i v\u1edbi \u0111\u1ed3ng<\/li>\n<li>Y\u00eau c\u1ea7u v\u1ec1 d\u00e2y d\u1eabn sau khi gi\u1ea3m t\u1ea3i = 437.5A \u00f7 0.82 \u2248 533A<\/li>\n<li>Th\u00eam h\u1ec7 s\u1ed1 d\u1ef1 ph\u00f2ng m\u1edf r\u1ed9ng = 533A \u00d7 1.20 \u2248 640A<\/li>\n<\/ul>\n<p><strong>B\u01b0\u1edbc 4 \u2013 Ch\u1ec9 \u0111\u1ecbnh thi\u1ebft b\u1ecb:<\/strong><\/p>\n<ul>\n<li>V\u1ecb tr\u00ed \u0111\u1ea7u v\u00e0o: 24 (\u0111\u00e1p \u1ee9ng 20 m\u1ee5c ti\u00eau c\u1ed9ng v\u1edbi h\u1ec7 s\u1ed1 an to\u00e0n)<\/li>\n<li>\u0110\u1ecbnh m\u1ee9c nh\u00e1nh: 21A tr\u00ean m\u1ed7i v\u1ecb tr\u00ed (h\u1ed7 tr\u1ee3 14A \u00d7 1.25 = 17.5A v\u1edbi kho\u1ea3ng tr\u1ed1ng)<\/li>\n<li>Thanh c\u00e1i \u0111\u1ea7u ra: \u0110\u1ecbnh m\u1ee9c li\u00ean t\u1ee5c t\u1ed1i thi\u1ec3u 650A<\/li>\n<li>\u0110i\u1ec7n \u00e1p: 1000 Vdc<\/li>\n<li>OCPD: C\u1ea7u ch\u00ec \u0111\u1ecbnh m\u1ee9c PV, 15A cho c\u00e1c chu\u1ed7i hi\u1ec7n t\u1ea1i, 20A cho t\u01b0\u01a1ng lai (trong gi\u1edbi h\u1ea1n c\u1ea7u ch\u00ec m\u1eafc n\u1ed1i ti\u1ebfp t\u1ed1i \u0111a c\u1ee7a module)<\/li>\n<\/ul>\n<p><strong>K\u1ebft qu\u1ea3:<\/strong> Ch\u1ec9 \u0111\u1ecbnh VIOX VSC-24-1000 ho\u1eb7c t\u01b0\u01a1ng \u0111\u01b0\u01a1ng: 24 v\u1ecb tr\u00ed, 1000 Vdc, nh\u00e1nh 21A, thanh c\u00e1i 650A+. Ban \u0111\u1ea7u l\u1eafp \u0111\u1eb7t 12 v\u1ecb tr\u00ed v\u1edbi c\u1ea7u ch\u00ec 15A v\u00e0 d\u00e2y d\u1eabn chu\u1ed7i ph\u00f9 h\u1ee3p. D\u1ef1 tr\u1eef 8\u201312 v\u1ecb tr\u00ed \u0111\u1ec3 m\u1edf r\u1ed9ng. D\u00e2y d\u1eabn \u0111\u1ea7u ra c\u00f3 k\u00edch th\u01b0\u1edbc cho 650A sau khi gi\u1ea3m t\u1ea3i.<\/p>\n<p>C\u00e1ch ti\u1ebfp c\u1eadn n\u00e0y t\u1ed1n h\u01a1n kho\u1ea3ng 15\u201320% chi ph\u00ed ban \u0111\u1ea7u so v\u1edbi b\u1ed9 k\u1ebft h\u1ee3p 12 v\u1ecb tr\u00ed c\u00f3 k\u00edch th\u01b0\u1edbc t\u1ed1i thi\u1ec3u, nh\u01b0ng lo\u1ea1i b\u1ecf nhu c\u1ea7u thay th\u1ebf t\u1ed1n k\u00e9m t\u1eeb 8.000\u201312.000, gi\u1ea5y ph\u00e9p v\u00e0 th\u1eddi gian ng\u1eebng ho\u1ea1t \u0111\u1ed9ng trong giai \u0111o\u1ea1n hai\u2014mang l\u1ea1i ROI 4:1 cho vi\u1ec7c l\u1eadp k\u1ebf ho\u1ea1ch m\u1edf r\u1ed9ng.<\/p>\n<figure style=\"margin: 20px 0; text-align: center;\"><img decoding=\"async\" style=\"max-width: 100%; height: auto;\" src=\"https:\/\/img.viox.com\/close-up-interior-view-of-viox-solar-combiner-box-showing-pv-rated-fuses-dc-circuit-breakers-copper-busbars-and-spare-positions-available-for-future-string-expansion-in-modular-design.webp\" alt=\"Close-up interior view of VIOX solar combiner box showing PV-rated fuses, DC circuit breakers, copper busbars, and spare positions available for future string expansion in modular design\" \/><figcaption style=\"font-style: italic; font-size: 0.9em; color: #666; margin-top: 8px;\">H\u00ecnh \u1ea3nh c\u1eadn c\u1ea3nh b\u00ean trong h\u1ed9p k\u1ebft h\u1ee3p n\u0103ng l\u01b0\u1ee3ng m\u1eb7t tr\u1eddi VIOX cho th\u1ea5y c\u1ea7u ch\u00ec \u0111\u1ecbnh m\u1ee9c PV, b\u1ed9 ng\u1eaft m\u1ea1ch DC, thanh c\u00e1i \u0111\u1ed3ng v\u00e0 c\u00e1c v\u1ecb tr\u00ed d\u1ef1 ph\u00f2ng c\u00f3 s\u1eb5n \u0111\u1ec3 m\u1edf r\u1ed9ng chu\u1ed7i trong t\u01b0\u01a1ng lai theo thi\u1ebft k\u1ebf d\u1ea1ng module<\/figcaption><\/figure>\n<h2>Nh\u1eefng sai l\u1ea7m th\u01b0\u1eddng g\u1eb7p c\u1ea7n tr\u00e1nh khi \u0111\u1ecbnh c\u1ee1<\/h2>\n<p>Ngay c\u1ea3 nh\u1eefng nh\u00e0 thi\u1ebft k\u1ebf gi\u00e0u kinh nghi\u1ec7m c\u0169ng m\u1eafc ph\u1ea3i nh\u1eefng sai l\u1ea7m c\u00f3 th\u1ec3 \u0111o\u00e1n tr\u01b0\u1edbc khi \u0111\u1ecbnh c\u1ee1 h\u1ed9p k\u1ebft h\u1ee3p n\u0103ng l\u01b0\u1ee3ng m\u1eb7t tr\u1eddi \u0111\u1ec3 m\u1edf r\u1ed9ng. Nh\u1eadn bi\u1ebft nh\u1eefng sai l\u1ea7m n\u00e0y gi\u00fap ti\u1ebft ki\u1ec7m th\u1eddi gian v\u00e0 ng\u00e2n s\u00e1ch.<\/p>\n<p><strong>Cung c\u1ea5p thi\u1ebfu v\u1ecb tr\u00ed \u0111\u1ea7u v\u00e0o:<\/strong> Ch\u1ec9 \u0111\u1ecbnh ch\u00ednh x\u00e1c s\u1ed1 l\u01b0\u1ee3ng v\u1ecb tr\u00ed b\u1ea1n c\u1ea7n ng\u00e0y h\u00f4m nay\u2014\u201dCh\u00fang t\u00f4i c\u00f3 16 chu\u1ed7i, v\u00ec v\u1eady ch\u00fang t\u00f4i s\u1ebd mua m\u1ed9t b\u1ed9 k\u1ebft h\u1ee3p 16 v\u1ecb tr\u00ed\u201d\u2014l\u00e0 l\u1ed7i th\u01b0\u1eddng g\u1eb7p nh\u1ea5t. Khi m\u1edf r\u1ed9ng, b\u1ea1n bu\u1ed9c ph\u1ea3i thay th\u1ebf to\u00e0n b\u1ed9 thi\u1ebft b\u1ecb ho\u1eb7c l\u1eafp \u0111\u1eb7t b\u1ed9 k\u1ebft h\u1ee3p th\u1ee9 hai \u1edf h\u1ea1 l\u01b0u, l\u00e0m t\u0103ng th\u00eam s\u1ef1 ph\u1ee9c t\u1ea1p v\u00e0 chi ph\u00ed. Lu\u00f4n l\u00e0m tr\u00f2n l\u00ean s\u1ed1 l\u01b0\u1ee3ng v\u1ecb tr\u00ed c\u00f3 s\u1eb5n ti\u1ebfp theo v\u1edbi h\u1ec7 s\u1ed1 an to\u00e0n.<\/p>\n<p><strong>B\u1ecf qua vi\u1ec7c gi\u1ea3m t\u1ea3i nhi\u1ec7t:<\/strong> Coi kh\u1ea3 n\u0103ng ch\u1ecbu t\u1ea3i tr\u00ean nh\u00e3n c\u1ee7a b\u1ed9 k\u1ebft h\u1ee3p l\u00e0 c\u00f4ng su\u1ea5t tuy\u1ec7t \u0111\u1ed1i m\u00e0 kh\u00f4ng \u00e1p d\u1ee5ng c\u00e1c \u0111i\u1ec1u ch\u1ec9nh nhi\u1ec7t \u0111\u1ed9 c\u1ee7a NEC d\u1eabn \u0111\u1ebfn d\u00e2y d\u1eabn qu\u00e1 kh\u1ed5 l\u00e0m n\u00f3ng ch\u1ea3y c\u00e1c \u0111\u1ea7u n\u1ed1i ho\u1eb7c g\u00e2y ra c\u00e1c chuy\u1ebfn \u0111i ng\u1eaft m\u1ea1ch phi\u1ec1n to\u00e1i. V\u1ecf ngo\u00e0i tr\u1eddi d\u01b0\u1edbi \u00e1nh n\u1eafng tr\u1ef1c ti\u1ebfp c\u00f3 th\u1ec3 \u0111\u1ea1t t\u1edbi 60\u201370\u00b0C b\u00ean trong. VIOX Electric thi\u1ebft k\u1ebf c\u00e1c b\u1ed9 k\u1ebft h\u1ee3p c\u00f3 kho\u1ea3ng tr\u1ed1ng nhi\u1ec7t t\u00edch h\u1ee3p, nh\u01b0ng b\u1ea1n v\u1eabn ph\u1ea3i \u00e1p d\u1ee5ng gi\u1ea3m t\u1ea3i theo y\u00eau c\u1ea7u c\u1ee7a m\u00e3 cho k\u00edch th\u01b0\u1edbc d\u00e2y d\u1eabn c\u1ee7a m\u00ecnh.<\/p>\n<p><strong>Tr\u1ed9n l\u1eabn c\u00e1c \u0111\u1ecbnh m\u1ee9c OCPD kh\u00f4ng t\u01b0\u01a1ng th\u00edch:<\/strong> Ban \u0111\u1ea7u l\u1eafp \u0111\u1eb7t c\u1ea7u ch\u00ec 15A, sau \u0111\u00f3 c\u1ed1 g\u1eafng th\u00eam c\u1ea7u ch\u00ec 25A sau n\u00e0y cho c\u00e1c module c\u00f3 d\u00f2ng \u0111i\u1ec7n cao h\u01a1n, t\u1ea1o ra c\u00e1c \u0111i\u1ec1u ki\u1ec7n c\u1ea5p ng\u01b0\u1ee3c nguy hi\u1ec3m n\u1ebfu d\u00e2y d\u1eabn chu\u1ed7i ban \u0111\u1ea7u kh\u00f4ng \u0111\u01b0\u1ee3c \u0111\u1ecbnh m\u1ee9c cho kh\u1ea3 n\u0103ng b\u1ea3o v\u1ec7 t\u0103ng l\u00ean. Ti\u00eau chu\u1ea9n h\u00f3a m\u1ed9t \u0111\u1ecbnh m\u1ee9c OCPD duy nh\u1ea5t ph\u00f9 h\u1ee3p v\u1edbi d\u00f2ng \u0111i\u1ec7n chu\u1ed7i d\u1ef1 ki\u1ebfn cao nh\u1ea5t c\u1ee7a b\u1ea1n ho\u1eb7c ghi l\u1ea1i r\u00f5 r\u00e0ng v\u1ecb tr\u00ed n\u00e0o h\u1ed7 tr\u1ee3 \u0111\u1ecbnh m\u1ee9c n\u00e0o.<\/p>\n<p><strong>V\u1ecb tr\u00ed b\u1ed9 k\u1ebft h\u1ee3p kh\u00f4ng linh ho\u1ea1t:<\/strong> G\u1eafn b\u1ed9 k\u1ebft h\u1ee3p c\u1ee7a b\u1ea1n \u1edf r\u00eca xa c\u1ee7a m\u1ea3ng hi\u1ec7n t\u1ea1i bu\u1ed9c b\u1ea1n ph\u1ea3i ch\u1ea1y c\u00e1c \u0111\u01b0\u1eddng d\u00e2y d\u1eabn d\u00e0i v\u00e0 t\u1ed1n k\u00e9m khi b\u1ea1n m\u1edf r\u1ed9ng theo m\u1ed9t h\u01b0\u1edbng kh\u00e1c. L\u1eadp k\u1ebf ho\u1ea1ch v\u1ecb tr\u00ed b\u1ed9 k\u1ebft h\u1ee3p \u1edf trung t\u00e2m so v\u1edbi d\u1ea5u ch\u00e2n m\u1ea3ng cu\u1ed1i c\u00f9ng c\u1ee7a b\u1ea1n, kh\u00f4ng ch\u1ec9 giai \u0111o\u1ea1n m\u1ed9t. C\u00e2n nh\u1eafc c\u00e1c h\u1ed9p k\u00e9o v\u00e0 \u0111\u01b0\u1eddng \u1ed1ng d\u1eabn \u0111\u1ebfn c\u00e1c khu v\u1ef1c m\u1edf r\u1ed9ng trong t\u01b0\u01a1ng lai trong qu\u00e1 tr\u00ecnh l\u1eafp \u0111\u1eb7t ban \u0111\u1ea7u.<\/p>\n<p><strong>B\u1ecf qua t\u00e0i li\u1ec7u:<\/strong> Vi\u1ec7c kh\u00f4ng ghi l\u1ea1i c\u00e1c t\u00ednh to\u00e1n NEC, c\u00e1c gi\u1ea3 \u0111\u1ecbnh gi\u1ea3m t\u1ea3i v\u00e0 c\u01a1 s\u1edf l\u00fd lu\u1eadn m\u1edf r\u1ed9ng c\u1ee7a b\u1ea1n c\u00f3 ngh\u0129a l\u00e0 k\u1ef9 s\u01b0 ti\u1ebfp theo ph\u1ea3i \u0111\u1ea3o ng\u01b0\u1ee3c \u00fd \u0111\u1ecbnh c\u1ee7a b\u1ea1n\u2014th\u01b0\u1eddng d\u1eabn \u0111\u1ebfn c\u00e1c thay th\u1ebf qu\u00e1 th\u1eadn tr\u1ecdng ho\u1eb7c c\u00e1c gi\u1ea3 \u0111\u1ecbnh kh\u00f4ng an to\u00e0n. Ghi l\u1ea1i \u0111i\u1ec7n \u00e1p, d\u00f2ng \u0111i\u1ec7n, \u0111i\u1ec1u ch\u1ec9nh nhi\u1ec7t \u0111\u1ed9 v\u00e0 ph\u00e2n b\u1ed5 v\u1ecb tr\u00ed trong b\u1ea3n v\u1ebd ho\u00e0n c\u00f4ng v\u00e0 h\u01b0\u1edbng d\u1eabn v\u1eadn h\u00e0nh v\u00e0 b\u1ea3o tr\u00ec c\u1ee7a b\u1ea1n.<\/p>\n<h2>K\u1ebft lu\u1eadn<\/h2>\n<p>\u0110\u1ecbnh c\u1ee1 h\u1ed9p k\u1ebft h\u1ee3p n\u0103ng l\u01b0\u1ee3ng m\u1eb7t tr\u1eddi \u0111\u1ec3 m\u1edf r\u1ed9ng chu\u1ed7i trong t\u01b0\u01a1ng lai kh\u00f4ng ph\u1ea3i l\u00e0 ph\u1ecfng \u0111o\u00e1n\u2014\u0111\u00f3 l\u00e0 k\u1ef9 thu\u1eadt c\u00f3 h\u1ec7 th\u1ed1ng. B\u1eb1ng c\u00e1ch t\u00ednh to\u00e1n c\u00e1c y\u00eau c\u1ea7u v\u1ec1 d\u00f2ng \u0111i\u1ec7n theo NEC 690, d\u1ef1 b\u00e1o t\u0103ng tr\u01b0\u1edfng th\u1ef1c t\u1ebf, \u00e1p d\u1ee5ng c\u00e1c h\u1ec7 s\u1ed1 gi\u1ea3m t\u1ea3i th\u00edch h\u1ee3p v\u00e0 ch\u1ecdn thi\u1ebft b\u1ecb c\u00f3 s\u1ed1 l\u01b0\u1ee3ng v\u1ecb tr\u00ed v\u00e0 kho\u1ea3ng tr\u1ed1ng kh\u1ea3 n\u0103ng ch\u1ecbu t\u1ea3i \u0111\u1ea7y \u0111\u1ee7, b\u1ea1n t\u1ea1o ra c\u01a1 s\u1edf h\u1ea1 t\u1ea7ng PV c\u00f3 th\u1ec3 m\u1edf r\u1ed9ng hi\u1ec7u qu\u1ea3 m\u00e0 kh\u00f4ng c\u1ea7n thay th\u1ebf t\u1ed1n k\u00e9m gi\u1eefa d\u1ef1 \u00e1n.<\/p>\n<p>VIOX Electric hi\u1ec3u r\u1eb1ng c\u00e1c h\u1ec7 th\u1ed1ng c\u00f3 th\u1ec3 m\u1edf r\u1ed9ng \u0111\u00f2i h\u1ecfi nhi\u1ec1u h\u01a1n l\u00e0 ch\u1ec9 c\u00e1c \u0111\u1ea7u n\u1ed1i b\u1ed5 sung. D\u00f2ng s\u1ea3n ph\u1ea9m h\u1ed9p k\u1ebft h\u1ee3p n\u0103ng l\u01b0\u1ee3ng m\u1eb7t tr\u1eddi d\u1ea1ng module c\u1ee7a ch\u00fang t\u00f4i t\u00edch h\u1ee3p qu\u1ea3n l\u00fd nhi\u1ec7t, kh\u1ea3 n\u0103ng d\u00f2ng \u0111i\u1ec7n nh\u00e1nh cao (l\u00ean \u0111\u1ebfn 21A) v\u00e0 b\u1ea3o v\u1ec7 ngo\u00e0i tr\u1eddi IP67 \u0111\u1ec3 h\u1ed7 tr\u1ee3 c\u1ea3 c\u00e0i \u0111\u1eb7t hi\u1ec7n t\u1ea1i v\u00e0 c\u00e1c giai \u0111o\u1ea1n trong t\u01b0\u01a1ng lai c\u1ee7a b\u1ea1n. V\u1edbi \u0111\u1ecbnh m\u1ee9c \u0111i\u1ec7n \u00e1p t\u1eeb 1000 Vdc \u0111\u1ebfn 1500 Vdc v\u00e0 c\u1ea5u h\u00ecnh \u0111\u1ea7u v\u00e0o linh ho\u1ea1t (16\u201324 v\u1ecb tr\u00ed), b\u1ed9 k\u1ebft h\u1ee3p VIOX cung c\u1ea5p cho b\u1ea1n n\u1ec1n t\u1ea3ng k\u1ef9 thu\u1eadt \u0111\u1ec3 ph\u00e1t tri\u1ec3n.<\/p>\n<p>B\u1ea1n \u0111\u00e3 s\u1eb5n s\u00e0ng ch\u1ec9 \u0111\u1ecbnh m\u1ed9t b\u1ed9 k\u1ebft h\u1ee3p s\u1eb5n s\u00e0ng cho t\u01b0\u01a1ng lai cho d\u1ef1 \u00e1n ti\u1ebfp theo c\u1ee7a m\u00ecnh ch\u01b0a?<a href=\"https:\/\/test.viox.com\/vi\/contact\/\"> Li\u00ean h\u1ec7 VIOX Electric<\/a>\u2018\u0110\u1ed9i ng\u0169 k\u1ef9 thu\u1eadt c\u1ee7a ch\u00fang t\u00f4i \u0111\u1ec3 \u0111\u01b0\u1ee3c t\u01b0 v\u1ea5n v\u1ec1 k\u00edch th\u01b0\u1edbc, b\u1ea3ng d\u1eef li\u1ec7u k\u1ef9 thu\u1eadt v\u00e0 c\u00e1c gi\u1ea3i ph\u00e1p t\u00f9y ch\u1ec9nh ph\u00f9 h\u1ee3p v\u1edbi th\u1eddi gian m\u1edf r\u1ed9ng c\u1ee7a b\u1ea1n. H\u00e3y x\u00e2y d\u1ef1ng c\u01a1 s\u1edf h\u1ea1 t\u1ea7ng n\u0103ng l\u01b0\u1ee3ng m\u1eb7t tr\u1eddi ph\u00e1t tri\u1ec3n c\u00f9ng v\u1edbi tham v\u1ecdng c\u1ee7a b\u1ea1n.<\/p>\n<\/div>\n<div class=\"simg-pop-btn\" style=\"top: 1828.98px; left: 14px; display: none;\"><\/div>\n<div class=\"simg-pop-btn\" style=\"top: 1828.98px; left: 14px; display: none;\"><\/div>\n<div class=\"simg-pop-btn\" style=\"top: 4847.55px; left: 14px; display: none;\"><\/div>\n<div class=\"simg-pop-btn\" style=\"top: 4847.55px; left: 14px; display: none;\"><\/div>\n<div class=\"simg-pop-btn\" style=\"top: 6422.38px; left: 14px; display: none;\"><\/div>\n<div class=\"simg-pop-btn\" style=\"top: 6422.38px; left: 14px; display: none;\"><\/div>\n<div class=\"simg-pop-btn\" style=\"top: 4793.05px; left: 14px; display: none;\"><\/div>\n<div class=\"simg-pop-btn\" style=\"top: 4793.05px; left: 14px; display: none;\"><\/div>","protected":false},"excerpt":{"rendered":"<p>Introduction When designing photovoltaic installations, few decisions carry as much long-term impact as properly sizing your solar combiner box. This critical junction point collects multiple PV strings into a single, higher-current output\u2014and undersizing it today can force expensive equipment replacement when you&#8217;re ready to expand tomorrow. According to field data from commercial solar contractors, nearly [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":20833,"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-20830","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\/20830","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=20830"}],"version-history":[{"count":2,"href":"https:\/\/test.viox.com\/vi\/wp-json\/wp\/v2\/posts\/20830\/revisions"}],"predecessor-version":[{"id":20832,"href":"https:\/\/test.viox.com\/vi\/wp-json\/wp\/v2\/posts\/20830\/revisions\/20832"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/test.viox.com\/vi\/wp-json\/wp\/v2\/media\/20833"}],"wp:attachment":[{"href":"https:\/\/test.viox.com\/vi\/wp-json\/wp\/v2\/media?parent=20830"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/test.viox.com\/vi\/wp-json\/wp\/v2\/categories?post=20830"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/test.viox.com\/vi\/wp-json\/wp\/v2\/tags?post=20830"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}