{"id":19745,"date":"2025-11-12T15:34:23","date_gmt":"2025-11-12T07:34:23","guid":{"rendered":"https:\/\/viox.com\/?p=19745"},"modified":"2025-11-12T15:34:25","modified_gmt":"2025-11-12T07:34:25","slug":"nema-class-20-vs-iec-class-10-overload-relay-guide","status":"publish","type":"post","link":"https:\/\/test.viox.com\/vi\/nema-class-20-vs-iec-class-10-overload-relay-guide\/","title":{"rendered":"R\u01a1 le qu\u00e1 t\u1ea3i NEMA Class 20 so v\u1edbi IEC Class 10: V\u1ee5 \u00e1n m\u1ea1ng b\u00ed \u1ea9n c\u1ee7a \u0111\u1ed9ng c\u01a1 $50.000"},"content":{"rendered":"<div class=\"product-intro\">\n<p><img fetchpriority=\"high\" decoding=\"async\" class=\"alignnone size-full wp-image-19749\" src=\"https:\/\/test.viox.com\/wp-content\/uploads\/2025\/11\/5k-loss-of-overload-relay.webp\" alt=\"5k loss of overload relay\" width=\"800\" height=\"643\" srcset=\"https:\/\/test.viox.com\/wp-content\/uploads\/2025\/11\/5k-loss-of-overload-relay.webp 800w, https:\/\/test.viox.com\/wp-content\/uploads\/2025\/11\/5k-loss-of-overload-relay-300x241.webp 300w, https:\/\/test.viox.com\/wp-content\/uploads\/2025\/11\/5k-loss-of-overload-relay-768x617.webp 768w, https:\/\/test.viox.com\/wp-content\/uploads\/2025\/11\/5k-loss-of-overload-relay-15x12.webp 15w, https:\/\/test.viox.com\/wp-content\/uploads\/2025\/11\/5k-loss-of-overload-relay-600x482.webp 600w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/><\/p>\n<p>S\u00e1u th\u00e1ng sau, \u0111\u1ed9ng c\u01a1 c\u1ee7a b\u1ea1n k\u00eau l\u00ean r\u1ed3i d\u1eebng h\u1eb3n. Thi\u1ebft b\u1ecb 200 HP (m\u00e3 l\u1ef1c) cung c\u1ea5p n\u0103ng l\u01b0\u1ee3ng cho d\u00e2y chuy\u1ec1n s\u1ea3n xu\u1ea5t ch\u00ednh c\u1ee7a b\u1ea1n \u0111\u00e3 b\u1ecb ch\u00e1y \u2013 cu\u1ed9n d\u00e2y b\u1ecb \u0111en, l\u1edbp c\u00e1ch \u0111i\u1ec7n b\u1ecb v\u1ee5n, v\u1ecf stato v\u1eabn t\u1ecfa nhi\u1ec7t nh\u01b0 m\u1ed9t l\u00f2 h\u1ecfa t\u00e1ng c\u00f4ng nghi\u1ec7p. R\u01a1 le qu\u00e1 t\u1ea3i Class 20 c\u1ee7a b\u1ea1n \u0111\u00e3 ch\u1ee9ng ki\u1ebfn v\u1ee5 gi\u1ebft ch\u00f3c di\u1ec5n ra. Kh\u00f4ng h\u1ec1 can thi\u1ec7p.<\/p>\n<p>T\u1ea5t c\u1ea3 ch\u1ec9 v\u00ec s\u00e1u th\u00e1ng tr\u01b0\u1edbc, b\u1ea1n \u0111\u00e3 ch\u1ecdn lo\u1ea1i r\u01a1 le cho b\u1ea1n nhi\u1ec1u th\u1eddi gian nh\u1ea5t thay v\u00ec lo\u1ea1i s\u1ebd c\u1ee9u \u0111\u1ed9ng c\u01a1 c\u1ee7a b\u1ea1n.<\/p>\n<p>L\u00e0m th\u1ebf n\u00e0o m\u00e0 m\u1ed9t quy\u1ebft \u0111\u1ecbnh v\u1ec1 th\u00e0nh ph\u1ea7n tr\u1ecb gi\u00e1 $200 l\u1ea1i bi\u1ebfn th\u00e0nh m\u1ed9t th\u1ea3m h\u1ecda tr\u1ecb gi\u00e1 $50.000+? C\u00e2u tr\u1ea3 l\u1eddi ti\u1ebft l\u1ed9 l\u00fd do t\u1ea1i sao h\u1ea7u h\u1ebft c\u00e1c k\u1ef9 s\u01b0 v\u00f4 t\u00ecnh ch\u1ec9 \u0111\u1ecbnh b\u1ea3o v\u1ec7 \u0111\u1ed9ng c\u01a1 t\u1ea1o ra c\u00e1c \u0111i\u1ec1u ki\u1ec7n g\u00e2y h\u1ecfng h\u00f3c thay v\u00ec ng\u0103n ch\u1eb7n ch\u00fang.<\/p>\n<h2>T\u1ea1i sao l\u1ef1a ch\u1ecdn Class 20 \u201cb\u1ea3o th\u1ee7\u201d c\u1ee7a b\u1ea1n ph\u00e1 h\u1ee7y \u0111\u1ed9ng c\u01a1 nhanh h\u01a1n Class 10<\/h2>\n<p><img decoding=\"async\" class=\"alignnone size-full wp-image-19747\" src=\"https:\/\/test.viox.com\/wp-content\/uploads\/2025\/11\/The-Cold-Start-Killer-Why-Class-20-Destroys-Motors.webp\" alt=\"The Cold Start Killer: Why Class 20 Destroys Motors.\" width=\"800\" height=\"800\" srcset=\"https:\/\/test.viox.com\/wp-content\/uploads\/2025\/11\/The-Cold-Start-Killer-Why-Class-20-Destroys-Motors.webp 800w, https:\/\/test.viox.com\/wp-content\/uploads\/2025\/11\/The-Cold-Start-Killer-Why-Class-20-Destroys-Motors-300x300.webp 300w, https:\/\/test.viox.com\/wp-content\/uploads\/2025\/11\/The-Cold-Start-Killer-Why-Class-20-Destroys-Motors-150x150.webp 150w, https:\/\/test.viox.com\/wp-content\/uploads\/2025\/11\/The-Cold-Start-Killer-Why-Class-20-Destroys-Motors-768x768.webp 768w, https:\/\/test.viox.com\/wp-content\/uploads\/2025\/11\/The-Cold-Start-Killer-Why-Class-20-Destroys-Motors-12x12.webp 12w, https:\/\/test.viox.com\/wp-content\/uploads\/2025\/11\/The-Cold-Start-Killer-Why-Class-20-Destroys-Motors-600x600.webp 600w, https:\/\/test.viox.com\/wp-content\/uploads\/2025\/11\/The-Cold-Start-Killer-Why-Class-20-Destroys-Motors-100x100.webp 100w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/><\/p>\n<p>K\u1ebb gi\u1ebft ng\u01b0\u1eddi kh\u1edfi \u0111\u1ed9ng ngu\u1ed9i khai th\u00e1c v\u1eadt l\u00fd nhi\u1ec7t m\u00e0 h\u1ea7u h\u1ebft c\u00e1c k\u1ef9 s\u01b0 kh\u00f4ng bao gi\u1edd xem x\u00e9t. Sau khi ng\u1eebng ho\u1ea1t \u0111\u1ed9ng v\u00e0o cu\u1ed1i tu\u1ea7n, cu\u1ed9n d\u00e2y \u0111\u1ed9ng c\u01a1 c\u1ee7a b\u1ea1n b\u1ecb ngu\u1ed9i \u2013 c\u00f3 ngh\u0129a l\u00e0 ch\u00fang c\u00f3 th\u1ec3 h\u1ea5p th\u1ee5 d\u00f2ng \u0111i\u1ec7n nhi\u1ec1u h\u01a1n 10-20% so v\u1edbi khi ho\u1ea1t \u0111\u1ed9ng n\u00f3ng b\u00ecnh th\u01b0\u1eddng tr\u01b0\u1edbc khi \u0111\u1ea1t \u0111\u1ebfn c\u00f9ng m\u1ed9t nhi\u1ec7t \u0111\u1ed9. Th\u1eddi gian kh\u1edfi \u0111\u1ed9ng 8 gi\u00e2y m\u00e0 b\u1ea1n \u0111o \u0111\u01b0\u1ee3c trong qu\u00e1 tr\u00ecnh ch\u1ea1y th\u1eed? Th\u00eam 1-3 gi\u00e2y cho th\u1ef1c t\u1ebf v\u00e0o s\u00e1ng th\u1ee9 Hai. \u0110\u00e2y l\u00e0 n\u01a1i v\u0169 kh\u00ed ho\u1ea1t \u0111\u1ed9ng: Class 20 cho \u0111\u1ed9ng c\u01a1 c\u1ee7a b\u1ea1n t\u1ed1i \u0111a 20 gi\u00e2y \u0111\u1ec3 \u0111\u1ea1t \u0111\u1ebfn m\u1ee9c ph\u00e1 h\u1ee7y nhi\u1ec7t. Class 10 ng\u1eaft trong 4-10 gi\u00e2y. C\u00e1c k\u1ef9 s\u01b0 th\u00edch l\u00e0m tr\u00f2n xu\u1ed1ng tr\u00ean c\u00f4ng t\u1eafc t\u01a1 v\u00e0 l\u00e0m tr\u00f2n l\u00ean tr\u00ean l\u1edbp ph\u1ee7 pizza. M\u1ed9t c\u00e1i ho\u1ea1t \u0111\u1ed9ng t\u1ed1t h\u01a1n c\u00e1i kia.<\/p>\n<p>L\u1edbp c\u00e1ch \u0111i\u1ec7n c\u1ee7a \u0111\u1ed9ng c\u01a1 tu\u00e2n theo ph\u00e9p to\u00e1n t\u00e0n kh\u1ed1c: c\u1ee9 m\u1ed7i 10\u00b0C v\u01b0\u1ee3t qu\u00e1 gi\u1edbi h\u1ea1n s\u1ebd l\u00e0m gi\u1ea3m m\u1ed9t n\u1eeda tu\u1ed5i th\u1ecd c\u1ee7a l\u1edbp c\u00e1ch \u0111i\u1ec7n. \u1ede d\u00f2ng kh\u1edfi \u0111\u1ed9ng 600%, c\u1eeda s\u1ed5 20 gi\u00e2y \u201cb\u1ea3o th\u1ee7\u201d \u0111\u00f3 tr\u1edf th\u00e0nh m\u1ed9t b\u1ea3n \u00e1n t\u1eed h\u00ecnh. M\u1ed1i quan h\u1ec7 I<sup>2<\/sup>t kh\u00f4ng quan t\u00e2m \u0111\u1ebfn b\u1eb1ng k\u1ef9 s\u01b0 c\u1ee7a b\u1ea1n. Thi\u1ec7t h\u1ea1i \u221d I<sup>2<\/sup> \u00d7 t. Ch\u1ea5m h\u1ebft. \u1ede d\u00f2ng \u0111i\u1ec7n 600% (nhi\u1ec7t 36\u00d7 b\u00ecnh th\u01b0\u1eddng), b\u1ea1n c\u00f3 kho\u1ea3ng 12 gi\u00e2y tr\u01b0\u1edbc khi x\u1ea3y ra h\u01b0 h\u1ecfng nhi\u1ec7t trong h\u1ea7u h\u1ebft c\u00e1c \u0111\u1ed9ng c\u01a1 c\u00f4ng nghi\u1ec7p \u2013 n\u1eb1m trong kho\u1ea3ng th\u1eddi gian ng\u1eaft c\u1ee7a Class 20 nh\u01b0ng \u0111\u01b0\u1ee3c b\u1ea3o v\u1ec7 an to\u00e0n b\u1edfi ph\u1ea3n \u1ee9ng nhanh h\u01a1n c\u1ee7a Class 10.<\/p>\n<p>Khi b\u1ea1n m\u1edf \u0111\u1ed9ng c\u01a1 b\u1ecb h\u1ecfng \u0111\u00f3, b\u1eb1ng ch\u1ee9ng k\u1ec3 c\u00e2u chuy\u1ec7n: cu\u1ed9n d\u00e2y tr\u00f4ng nh\u01b0 th\u1ec3 ch\u00fang \u0111\u00e3 tr\u1ea3i qua ch\u1ea5n th\u01b0\u01a1ng c\u00f4ng nghi\u1ec7p, l\u1edbp c\u00e1ch \u0111i\u1ec7n b\u1ecb t\u1ed5n h\u1ea1i, d\u00e2y d\u1eabn \u0111\u1ed3ng b\u1ecb \u1ee9ng su\u1ea5t v\u01b0\u1ee3t qu\u00e1 gi\u1edbi h\u1ea1n. R\u01a1 le Class 20 ng\u1ed3i \u0111\u00f3 trong 12+ gi\u00e2y theo d\u00f5i nhi\u1ec7t \u0111\u1ed9 leo l\u00ean qu\u00e1 gi\u1edbi h\u1ea1n an to\u00e0n, ngh\u0129 r\u1eb1ng \u2018c\u00f2n nhi\u1ec1u th\u1eddi gian.\u2019 Ng\u00e2n s\u00e1ch nhi\u1ec7t c\u1ee7a \u0111\u1ed9ng c\u01a1 c\u1ee7a b\u1ea1n \u0111\u00e3 h\u1ebft tr\u01b0\u1edbc.<\/p>\n<h2>Ng\u00e2n s\u00e1ch nhi\u1ec7t: T\u1ea1i sao \u0111\u1ed9ng c\u01a1 c\u00f3 \u00edt th\u1eddi gian h\u01a1n b\u1ea1n ngh\u0129<\/h2>\n<p>Gi\u00e1o vi\u00ean v\u1eadt l\u00fd trung h\u1ecdc c\u1ee7a b\u1ea1n ch\u01b0a bao gi\u1edd \u0111\u1ec1 c\u1eadp \u0111\u1ebfn Ng\u00e2n s\u00e1ch nhi\u1ec7t, nh\u01b0ng \u0111\u00f3 l\u00e0 ph\u01b0\u01a1ng tr\u00ecnh quan tr\u1ecdng nh\u1ea5t trong b\u1ea3o v\u1ec7 \u0111\u1ed9ng c\u01a1. H\u00e3y ngh\u0129 v\u1ec1 n\u00f3 nh\u01b0 m\u1ed9t t\u00e0i kho\u1ea3n s\u00e9c: m\u1ed7i \u0111\u1ed9 v\u01b0\u1ee3t qu\u00e1 gi\u1edbi h\u1ea1n nhi\u1ec7t \u0111\u1ed9 c\u1ee7a \u0111\u1ed9ng c\u01a1 th\u1ec3 hi\u1ec7n m\u1ed9t kho\u1ea3n r\u00fat kh\u1ecfi m\u1ed9t t\u00e0i kho\u1ea3n h\u1eefu h\u1ea1n. B\u1ea3o v\u1ec7 Class 10 theo d\u00f5i s\u1ed1 d\u01b0 v\u00e0 d\u1eebng r\u00fat ti\u1ec1n tr\u01b0\u1edbc khi th\u1ea5u chi. Class 20 cung c\u1ea5p chi ti\u00eau kh\u00f4ng gi\u1edbi h\u1ea1n trong t\u1ed1i \u0111a 20 gi\u00e2y, sau \u0111\u00f3 t\u1ecf ra ng\u1ea1c nhi\u00ean khi t\u00e0i kho\u1ea3n \u0111\u1ea1t \u0111\u1ebfn s\u1ed1 kh\u00f4ng.<\/p>\n<p>M\u1ed1i quan h\u1ec7 d\u00f2ng \u0111i\u1ec7n-th\u1eddi gian \u0111i ng\u01b0\u1ee3c l\u1ea1i tr\u1ef1c gi\u00e1c tuy\u1ebfn t\u00ednh: \u1edf d\u00f2ng \u0111i\u1ec7n 200%, b\u1ea1n c\u00f3 v\u00e0i ph\u00fat tr\u01b0\u1edbc khi h\u01b0 h\u1ecfng nhi\u1ec7t. \u1ede d\u00f2ng \u0111i\u1ec7n 400%, c\u00f3 l\u1ebd 30 gi\u00e2y. \u1ede d\u00f2ng kh\u1edfi \u0111\u1ed9ng 600%, c\u00f2n l\u1ea1i kho\u1ea3ng 12 gi\u00e2y. M\u00f4 h\u00ecnh b\u1ea3o v\u1ec7 I<sup>2<\/sup>t chi ph\u1ed1i b\u1ea5t k\u1ec3 tr\u1ef1c gi\u00e1c k\u1ef9 thu\u1eadt: khi \u222b(I<sup>2<\/sup> \u2013 1)dt \u0111\u1ea1t \u0111\u1ebfn gi\u1edbi h\u1ea1n nhi\u1ec7t, s\u1ef1 c\u1ed1 c\u00e1ch \u0111i\u1ec7n b\u1eaft \u0111\u1ea7u. H\u1ea7u h\u1ebft c\u00e1c k\u1ef9 s\u01b0 th\u1ea5y \u201c20 gi\u00e2y\u201d v\u00e0 ngh\u0129 \u201cb\u1ea3o th\u1ee7\u201d. \u0110\u1ed9ng c\u01a1 th\u1ea5y d\u00f2ng \u0111i\u1ec7n 600% v\u00e0 kh\u1edfi t\u1ea1o c\u00e1c giao th\u1ee9c nhi\u1ec7t kh\u1ea9n c\u1ea5p.<\/p>\n<p>Thu\u1ebf 10\u00b0C \u0111\u00e1nh c\u1eafp ng\u00e2n s\u00e1ch nhi\u1ec7t c\u1ee7a b\u1ea1n khi b\u1ea1n kh\u00f4ng \u0111\u1ec3 \u00fd. C\u1ee9 m\u1ed7i 10\u00b0C tr\u00ean nhi\u1ec7t \u0111\u1ed9 m\u00f4i tr\u01b0\u1eddng 40\u00b0C s\u1ebd l\u00e0m gi\u1ea3m c\u1ea3 c\u00f4ng su\u1ea5t \u0111\u1ed9ng c\u01a1 v\u00e0 \u0111\u1ed9 nh\u1ea1y c\u1ee7a r\u01a1 le. B\u1ea3ng \u0111i\u1ec1u khi\u1ec3n \u0111\u00f3 \u0111\u1ea1t 60\u00b0C v\u00e0o gi\u1eefa bu\u1ed5i chi\u1ec1u? \u0110\u1ee7 n\u00f3ng \u0111\u1ec3 khi\u1ebfn b\u1ea1n r\u1ee5t tay l\u1ea1i. \u0110\u1ee7 n\u00f3ng \u0111\u1ec3 c\u01b0\u1edbp \u0111i 7 ampe c\u00f4ng su\u1ea5t c\u1ee7a c\u00f4ng t\u1eafc t\u01a1 25A c\u1ee7a b\u1ea1n. Kho\u1ea3ng c\u00e1ch b\u1ea3o v\u1ec7 m\u1edf r\u1ed9ng ch\u00ednh x\u00e1c khi \u1ee9ng su\u1ea5t nhi\u1ec7t \u0111\u1ea1t \u0111\u1ec9nh \u2013 Thu\u1ebf 10\u00b0C \u0111\u01b0\u1ee3c thu trong cu\u1ed9n d\u00e2y \u0111\u1ed9ng c\u01a1.<\/p>\n<h2>Ph\u01b0\u01a1ng ph\u00e1p 5 b\u01b0\u1edbc \u0111\u1ec3 ch\u1ecdn lo\u1ea1i r\u01a1 le qu\u00e1 t\u1ea3i ng\u0103n ng\u1eeba h\u1ecfng h\u00f3c \u0111\u1ed9ng c\u01a1<\/h2>\n<h3>B\u01b0\u1edbc 1: T\u00ednh to\u00e1n ng\u00e2n s\u00e1ch nhi\u1ec7t th\u1ef1c t\u1ebf c\u1ee7a \u0111\u1ed9ng c\u01a1 c\u1ee7a b\u1ea1n<\/h3>\n<p>B\u1eaft \u0111\u1ea7u v\u1edbi c\u00e1c gi\u1edbi h\u1ea1n nhi\u1ec7t \u0111\u00edch th\u1ef1c \u2013 kh\u00f4ng ph\u1ea3i s\u1ef1 l\u1ea1c quan tr\u00ean nh\u00e3n. \u0110\u1ed1i v\u1edbi c\u00e1c \u0111\u1ed9ng c\u01a1 NEMA Design B \u0111i\u1ec3n h\u00ecnh v\u1edbi l\u1edbp c\u00e1ch \u0111i\u1ec7n Class F, h\u01b0 h\u1ecfng nhi\u1ec7t x\u1ea3y ra trong kho\u1ea3ng 12-15 gi\u00e2y d\u01b0\u1edbi d\u00f2ng \u0111i\u1ec7n kh\u00f3a r\u00f4to 600%. Nh\u01b0ng th\u1ef1c t\u1ebf m\u00e0 h\u1ea7u h\u1ebft c\u00e1c k\u1ef9 s\u01b0 b\u1ecf l\u1ee1: cu\u1ed9n d\u00e2y ngu\u1ed9i h\u1ea5p th\u1ee5 d\u00f2ng \u0111i\u1ec7n nhi\u1ec1u h\u01a1n 10-20% tr\u01b0\u1edbc khi \u0111\u1ea1t \u0111\u1ebfn gi\u1edbi h\u1ea1n nhi\u1ec7t \u0111\u1ed9. Th\u1eddi gian kh\u1edfi \u0111\u1ed9ng 8 gi\u00e2y m\u00e0 b\u1ea1n \u0111o \u0111\u01b0\u1ee3c tr\u1edf th\u00e0nh 9-11 gi\u00e2y trong qu\u00e1 tr\u00ecnh kh\u1edfi \u0111\u1ed9ng l\u1ea1i v\u00e0o s\u00e1ng th\u1ee9 Hai.<\/p>\n<p><strong>M\u1eb9o chuy\u00ean nghi\u1ec7p #1: H\u1ec7 s\u1ed1 nh\u00e2n kh\u1edfi \u0111\u1ed9ng ngu\u1ed9i:<\/strong> Cu\u1ed9n d\u00e2y \u0111\u1ed9ng c\u01a1 ngu\u1ed9i h\u1ea5p th\u1ee5 d\u00f2ng \u0111i\u1ec7n nhi\u1ec1u h\u01a1n 10-20% trong qu\u00e1 tr\u00ecnh kh\u1edfi \u0111\u1ed9ng so v\u1edbi \u0111\u1ed9ng c\u01a1 n\u00f3ng. Th\u1eddi gian kh\u1edfi \u0111\u1ed9ng 8 gi\u00e2y m\u00e0 b\u1ea1n \u0111o \u0111\u01b0\u1ee3c trong qu\u00e1 tr\u00ecnh ch\u1ea1y th\u1eed? Th\u00eam 1-3 gi\u00e2y cho th\u1ef1c t\u1ebf v\u00e0o s\u00e1ng th\u1ee9 Hai. N\u1ebfu c\u00e1c t\u00ednh to\u00e1n cho th\u1ea5y 10 gi\u00e2y \u0111\u1ebfn h\u01b0 h\u1ecfng nhi\u1ec7t, c\u1eeda s\u1ed5 20 gi\u00e2y c\u1ee7a Class 20 kh\u00f4ng ph\u1ea3i l\u00e0 b\u1ea3o th\u1ee7 \u2013 m\u00e0 l\u00e0 th\u1ea3m kh\u1ed1c.<\/p>\n<p>T\u00ednh \u0111\u1ebfn c\u00e1c \u0111i\u1ec1u ki\u1ec7n th\u1ef1c t\u1ebf: t\u1ea3i qu\u00e1n t\u00ednh cao k\u00e9o d\u00e0i th\u1eddi gian kh\u1edfi \u0111\u1ed9ng, \u0111i\u1ec7n \u00e1p th\u1ea5p k\u00e9o d\u00e0i th\u1eddi gian kh\u1edfi \u0111\u1ed9ng, nhi\u1ec7t \u0111\u1ed9 m\u00f4i tr\u01b0\u1eddng l\u1ea1nh k\u00e9o d\u00e0i th\u1eddi gian kh\u1edfi \u0111\u1ed9ng. \u00c1p d\u1ee5ng bi\u00ean \u0111\u1ed9 an to\u00e0n 20% cho c\u00e1c bi\u1ebfn s\u1ed1 trong th\u1ebf gi\u1edbi th\u1ef1c. N\u1ebfu \u0111\u1ed9ng c\u01a1 c\u1ee7a b\u1ea1n c\u1ea7n 10 gi\u00e2y \u0111\u1ec3 t\u0103ng t\u1ed1c an to\u00e0n v\u00e0 h\u01b0 h\u1ecfng nhi\u1ec7t x\u1ea3y ra sau 12 gi\u00e2y, c\u1eeda s\u1ed5 4-10 gi\u00e2y c\u1ee7a Class 10 s\u1ebd cung c\u1ea5p kh\u1ea3 n\u0103ng b\u1ea3o v\u1ec7. C\u1eeda s\u1ed5 6-20 gi\u00e2y c\u1ee7a Class 20 c\u00f3 nguy c\u01a1 ph\u00e1 h\u1ee7y.<\/p>\n<h3>B\u01b0\u1edbc 2: L\u1eadp b\u1ea3n \u0111\u1ed3 th\u1eddi gian ng\u1eaft so v\u1edbi \u0111\u01b0\u1eddng cong h\u01b0 h\u1ecfng nhi\u1ec7t<\/h3>\n<p>Ph\u00e2n t\u00edch ph\u1ed1i h\u1ee3p v\u1eabn \u0111\u01a1n gi\u1ea3n: ph\u1ee7 c\u00e1c \u0111\u01b0\u1eddng cong h\u01b0 h\u1ecfng nhi\u1ec7t c\u1ee7a \u0111\u1ed9ng c\u01a1 v\u1edbi c\u00e1c \u0111\u1eb7c t\u00ednh ng\u1eaft c\u1ee7a r\u01a1 le. \u0110\u1ed1i v\u1edbi c\u00e1c \u0111\u1ed9ng c\u01a1 200 HP \u0111i\u1ec3n h\u00ecnh (240-250A FLA cho h\u1ec7 th\u1ed1ng 460V) v\u1edbi th\u1eddi gian h\u01b0 h\u1ecfng nhi\u1ec7t 12 gi\u00e2y \u1edf d\u00f2ng \u0111i\u1ec7n 600%, c\u00e1c y\u00eau c\u1ea7u b\u1ea3o v\u1ec7 tr\u1edf n\u00ean r\u00f5 r\u00e0ng. Class 10 cung c\u1ea5p 4-10 gi\u00e2y \u0111\u1ec3 ng\u1eaft \u2013 lu\u00f4n lu\u00f4n tr\u01b0\u1edbc khi h\u01b0 h\u1ecfng nhi\u1ec7t. Class 20 cho ph\u00e9p 6-20 gi\u00e2y \u2013 \u0111\u00f4i khi b\u1ea3o v\u1ec7, \u0111\u00f4i khi ph\u00e1 h\u1ee7y. \u201c\u0110\u00f4i khi\u201d kh\u00f4ng ph\u1ea3i l\u00e0 m\u1ed9t chi\u1ebfn l\u01b0\u1ee3c b\u1ea3o v\u1ec7.<\/p>\n<p><strong>M\u1eb9o chuy\u00ean nghi\u1ec7p #2: Quy t\u1eafc 600%:<\/strong> Lu\u00f4n x\u00e1c minh kh\u1ea3 n\u0103ng th\u1eddi gian r\u00f4to b\u1ecb kh\u00f3a c\u1ee7a \u0111\u1ed9ng c\u01a1 so v\u1edbi gi\u1edbi h\u1ea1n lo\u1ea1i r\u01a1 le c\u1ed9ng v\u1edbi bi\u00ean \u0111\u1ed9 10%. N\u1ebfu \u0111\u1ed9ng c\u01a1 s\u1ed1ng s\u00f3t sau 12 gi\u00e2y \u1edf d\u00f2ng \u0111i\u1ec7n 600%, Class 10 cung c\u1ea5p 4-10 gi\u00e2y. Class 20 cung c\u1ea5p 6-20 gi\u00e2y. Ch\u1ecdn lo\u1ea1i ng\u1eaft tr\u01b0\u1edbc khi h\u01b0 h\u1ecfng nhi\u1ec7t \u2013 kh\u00f4ng ph\u1ea3i lo\u1ea1i cung c\u1ea5p th\u1eddi gian t\u1ed1i \u0111a.<\/p>\n<p>Nh\u01b0ng \u0111\u00e2y l\u00e0 s\u1ef1 th\u1eadt ph\u1ea3n tr\u1ef1c gi\u00e1c ph\u00e2n bi\u1ec7t c\u00e1c k\u1ef9 s\u01b0 gi\u1ecfi v\u1edbi c\u00e1c k\u1ef9 s\u01b0 xu\u1ea5t s\u1eafc: b\u1ea3o v\u1ec7 nhanh h\u01a1n th\u01b0\u1eddng c\u00f3 ngh\u0129a l\u00e0 \u00edt chuy\u1ebfn \u0111i g\u00e2y phi\u1ec1n to\u00e1i h\u01a1n, kh\u00f4ng ph\u1ea3i nhi\u1ec1u h\u01a1n. Khi b\u1ea3o v\u1ec7 ho\u1ea1t \u0111\u1ed9ng nhanh ch\u00f3ng v\u00e0 c\u00f3 th\u1ec3 d\u1ef1 \u0111o\u00e1n \u0111\u01b0\u1ee3c, b\u1ea1n c\u00f3 th\u1ec3 t\u1ed1i \u01b0u h\u00f3a c\u00e0i \u0111\u1eb7t g\u1ea7n h\u01a1n v\u1edbi c\u00e1c \u0111i\u1ec1u ki\u1ec7n ho\u1ea1t \u0111\u1ed9ng th\u1ef1c t\u1ebf. C\u1eeda s\u1ed5 r\u1ed9ng c\u1ee7a Class 20 bu\u1ed9c c\u00e1c c\u00e0i \u0111\u1eb7t b\u1ea3o th\u1ee7 \u0111\u1ec3 tr\u00e1nh c\u00e1c chuy\u1ebfn \u0111i mu\u1ed9n th\u1ec9nh tho\u1ea3ng gi\u1ebft ch\u1ebft \u0111\u1ed9ng c\u01a1. Ho\u1ea1t \u0111\u1ed9ng nhanh h\u01a1n, nh\u1ea5t qu\u00e1n h\u01a1n c\u1ee7a Class 10 cho ph\u00e9p t\u1ed1i \u01b0u h\u00f3a c\u1ea3 b\u1ea3o v\u1ec7 v\u00e0 hi\u1ec7u qu\u1ea3 ho\u1ea1t \u0111\u1ed9ng.<\/p>\n<h3>B\u01b0\u1edbc 3: T\u00ednh \u0111\u1ebfn c\u00e1c y\u00eau c\u1ea7u b\u1ea3o v\u1ec7 \u1ea9n<\/h3>\n<p>Ph\u00e1t hi\u1ec7n m\u1ed9t pha \u0111\u1ea1i di\u1ec7n cho s\u1ef1 kh\u00e1c bi\u1ec7t \u1ea9n l\u1edbn nh\u1ea5t gi\u1eefa tri\u1ebft l\u00fd b\u1ea3o v\u1ec7 NEMA v\u00e0 IEC. IEC 60947-4-1:2020 quy \u0111\u1ecbnh r\u1eb1ng r\u01a1 le Class 10 ph\u00e1t hi\u1ec7n v\u00e0 ph\u1ea3n \u1ee9ng v\u1edbi c\u00e1c \u0111i\u1ec1u ki\u1ec7n m\u1ed9t pha trong v\u00f2ng 10 ph\u00fat \u1edf d\u00f2ng \u0111i\u1ec7n 130%. NEMA ICS 2-223:2023 kh\u00f4ng y\u00eau c\u1ea7u ph\u00e1t hi\u1ec7n m\u1ed9t pha cho r\u01a1 le Class 20. Trong c\u00e1c \u1ee9ng d\u1ee5ng b\u01a1m, l\u00e0m l\u1ea1nh v\u00e0 qu\u1ea1t, n\u01a1i m\u1ed9t pha ph\u00e1 h\u1ee7y \u0111\u1ed9ng c\u01a1 trong v\u00f2ng ch\u01b0a \u0111\u1ea7y 3 ph\u00fat, l\u1ef1a ch\u1ecdn Class 20 \u201cb\u1ea3o th\u1ee7\u201d \u0111\u00f3 t\u1ea1o ra c\u00e1c ch\u1ebf \u0111\u1ed9 h\u1ecfng h\u00f3c m\u00e0 Class 10 t\u1ef1 \u0111\u1ed9ng b\u1eaft \u0111\u01b0\u1ee3c.<\/p>\n<p><strong>M\u1eb9o chuy\u00ean nghi\u1ec7p #3: \u0110i\u1ec3m m\u00f9 m\u1ed9t pha:<\/strong> R\u01a1 le NEMA Class 20 kh\u00f4ng y\u00eau c\u1ea7u ph\u00e1t hi\u1ec7n m\u1ed9t pha. IEC Class 10 th\u00ec c\u00f3. Trong c\u00e1c \u1ee9ng d\u1ee5ng b\u01a1m v\u00e0 l\u00e0m l\u1ea1nh, m\u1ed9t pha c\u00f3 th\u1ec3 ph\u00e1 h\u1ee7y \u0111\u1ed9ng c\u01a1 trong v\u00f2ng ch\u01b0a \u0111\u1ea7y 3 ph\u00fat. L\u1ef1a ch\u1ecdn Class 20 \u201cb\u1ea3o th\u1ee7\u201d \u0111\u00f3 t\u1ea1o ra c\u00e1c ch\u1ebf \u0111\u1ed9 h\u1ecfng h\u00f3c m\u00e0 Class 10 s\u1ebd t\u1ef1 \u0111\u1ed9ng b\u1eaft \u0111\u01b0\u1ee3c.<\/p>\n<p>Gi\u1ea3m \u0111\u1ecbnh m\u1ee9c m\u00f4i tr\u01b0\u1eddng l\u00e0m gi\u1ea3m kh\u1ea3 n\u0103ng b\u1ea3o v\u1ec7 khi c\u1ea7n thi\u1ebft nh\u1ea5t. Thu\u1ebf 10\u00b0C \u00e1p d\u1ee5ng cho c\u1ea3 \u0111\u1ed9ng c\u01a1 v\u00e0 r\u01a1 le: c\u1ee9 kho\u1ea3ng 10\u00b0C tr\u00ean nhi\u1ec7t \u0111\u1ed9 m\u00f4i tr\u01b0\u1eddng 40\u00b0C s\u1ebd l\u00e0m gi\u1ea3m \u0111\u1ed9 nh\u1ea1y c\u1ee7a r\u01a1 le t\u1eeb 2-6% (t\u00f9y thu\u1ed9c v\u00e0o nh\u00e0 s\u1ea3n xu\u1ea5t). B\u1ea3ng \u0111i\u1ec1u khi\u1ec3n \u0111\u1ea1t 60\u00b0C trong nh\u1eefng bu\u1ed5i chi\u1ec1u m\u00f9a h\u00e8? R\u01a1 le Class 20 25A c\u1ee7a b\u1ea1n ho\u1ea1t \u0111\u1ed9ng g\u1ea7n h\u01a1n v\u1edbi c\u00f4ng su\u1ea5t hi\u1ec7u d\u1ee5ng 21-23A, trong khi \u0111\u1ed9ng c\u01a1 v\u1eabn y\u00eau c\u1ea7u 24A \u1edf to\u00e0n t\u1ea3i. Kho\u1ea3ng c\u00e1ch b\u1ea3o v\u1ec7 m\u1edf r\u1ed9ng khi \u1ee9ng su\u1ea5t nhi\u1ec7t \u0111\u1ea1t \u0111\u1ec9nh.<\/p>\n<p>Ki\u1ec3m tra ch\u1ea5t l\u01b0\u1ee3ng l\u1ef1a ch\u1ecdn so v\u1edbi c\u00e1c ch\u1ebf \u0111\u1ed9 h\u1ecfng h\u00f3c th\u1ef1c t\u1ebf trong \u1ee9ng d\u1ee5ng c\u1ee7a b\u1ea1n. T\u1ea3i qu\u00e1n t\u00ednh cao c\u1ea7n b\u1ea3o v\u1ec7 nhanh h\u01a1n, kh\u00f4ng ch\u1eadm h\u01a1n. Chu k\u1ef3 kh\u1edfi \u0111\u1ed9ng th\u01b0\u1eddng xuy\u00ean c\u1ea7n th\u1eddi gian ng\u1eaft c\u00f3 th\u1ec3 d\u1ef1 \u0111o\u00e1n \u0111\u01b0\u1ee3c, kh\u00f4ng ph\u1ea3i c\u1eeda s\u1ed5 r\u1ed9ng. C\u00e1c \u1ee9ng d\u1ee5ng quan tr\u1ecdng c\u1ea7n c\u00e1c t\u00ednh n\u0103ng n\u00e2ng cao m\u00e0 r\u01a1 le IEC \u0111i\u1ec7n t\u1eed cung c\u1ea5p: ph\u00e1t hi\u1ec7n l\u1ed7i \u0111\u1ea5t, b\u1ea3o v\u1ec7 m\u1ea5t c\u00e2n b\u1eb1ng pha, m\u00f4 h\u00ecnh nhi\u1ec7t t\u00ednh \u0111\u1ebfn l\u1ecbch s\u1eed kh\u1edfi \u0111\u1ed9ng. T\u1ea5t nhi\u00ean, n\u00f3 \u0111\u00e3 b\u1ecb l\u1ed7i v\u00e0o th\u1ee9 S\u00e1u l\u00fac 4:45 chi\u1ec1u \u2013 \u0111\u00f3 l\u00e0 khi ng\u00e2n s\u00e1ch nhi\u1ec7t cu\u1ed1i c\u00f9ng c\u1ea1n ki\u1ec7t sau m\u1ed9t tu\u1ea7n r\u00fat Thu\u1ebf 10\u00b0C.<\/p>\n<div id='gallery-1' class='gallery galleryid-19745 gallery-columns-3 gallery-size-full'><figure class='gallery-item'>\n\t\t\t<div class='gallery-icon landscape'>\n\t\t\t\t<a href='https:\/\/test.viox.com\/vi\/?attachment_id=5300'><img decoding=\"async\" width=\"800\" height=\"800\" src=\"https:\/\/test.viox.com\/wp-content\/uploads\/2024\/09\/JR28-Thermal-Overload-Relay01.webp\" class=\"attachment-full size-full\" alt=\"JR28 Thermal Overload Relay\" srcset=\"https:\/\/test.viox.com\/wp-content\/uploads\/2024\/09\/JR28-Thermal-Overload-Relay01.webp 800w, https:\/\/test.viox.com\/wp-content\/uploads\/2024\/09\/JR28-Thermal-Overload-Relay01-300x300.webp 300w, https:\/\/test.viox.com\/wp-content\/uploads\/2024\/09\/JR28-Thermal-Overload-Relay01-150x150.webp 150w, https:\/\/test.viox.com\/wp-content\/uploads\/2024\/09\/JR28-Thermal-Overload-Relay01-768x768.webp 768w, https:\/\/test.viox.com\/wp-content\/uploads\/2024\/09\/JR28-Thermal-Overload-Relay01-600x600.webp 600w, https:\/\/test.viox.com\/wp-content\/uploads\/2024\/09\/JR28-Thermal-Overload-Relay01-100x100.webp 100w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/><\/a>\n\t\t\t<\/div><\/figure><figure class='gallery-item'>\n\t\t\t<div class='gallery-icon landscape'>\n\t\t\t\t<a href='https:\/\/test.viox.com\/vi\/?attachment_id=6418'><img loading=\"lazy\" decoding=\"async\" width=\"800\" height=\"800\" src=\"https:\/\/test.viox.com\/wp-content\/uploads\/2024\/09\/LR2-D23-Thermal-Overload-Relay.webp\" class=\"attachment-full size-full\" alt=\"LR2-D23 Thermal Overload Relay\" srcset=\"https:\/\/test.viox.com\/wp-content\/uploads\/2024\/09\/LR2-D23-Thermal-Overload-Relay.webp 800w, https:\/\/test.viox.com\/wp-content\/uploads\/2024\/09\/LR2-D23-Thermal-Overload-Relay-300x300.webp 300w, https:\/\/test.viox.com\/wp-content\/uploads\/2024\/09\/LR2-D23-Thermal-Overload-Relay-150x150.webp 150w, https:\/\/test.viox.com\/wp-content\/uploads\/2024\/09\/LR2-D23-Thermal-Overload-Relay-768x768.webp 768w, https:\/\/test.viox.com\/wp-content\/uploads\/2024\/09\/LR2-D23-Thermal-Overload-Relay-600x600.webp 600w, https:\/\/test.viox.com\/wp-content\/uploads\/2024\/09\/LR2-D23-Thermal-Overload-Relay-100x100.webp 100w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/><\/a>\n\t\t\t<\/div><\/figure><figure class='gallery-item'>\n\t\t\t<div class='gallery-icon landscape'>\n\t\t\t\t<a href='https:\/\/test.viox.com\/vi\/?attachment_id=6421'><img loading=\"lazy\" decoding=\"async\" width=\"600\" height=\"600\" src=\"https:\/\/test.viox.com\/wp-content\/uploads\/2024\/09\/Thermal-Overload-Relay-LR2-D33.jpg\" class=\"attachment-full size-full\" alt=\"\" srcset=\"https:\/\/test.viox.com\/wp-content\/uploads\/2024\/09\/Thermal-Overload-Relay-LR2-D33.jpg 600w, https:\/\/test.viox.com\/wp-content\/uploads\/2024\/09\/Thermal-Overload-Relay-LR2-D33-300x300.jpg 300w, https:\/\/test.viox.com\/wp-content\/uploads\/2024\/09\/Thermal-Overload-Relay-LR2-D33-150x150.jpg 150w, https:\/\/test.viox.com\/wp-content\/uploads\/2024\/09\/Thermal-Overload-Relay-LR2-D33-100x100.jpg 100w, https:\/\/test.viox.com\/wp-content\/uploads\/2024\/09\/elementor\/thumbs\/Thermal-Overload-Relay-LR2-D33-150x150.jpg 800w\" sizes=\"(max-width: 600px) 100vw, 600px\" \/><\/a>\n\t\t\t<\/div><\/figure>\n\t\t<\/div>\n\n<p style=\"text-align: center;\"><a href=\"https:\/\/test.viox.com\/vi\/san-pham\/jr36-thermal-overload-relay\/\">S\u1ea3n ph\u1ea9m r\u01a1 le qu\u00e1 t\u1ea3i VIOX<\/a><\/p>\n<h2>Hi\u1ec3u t\u1ed1c \u0111\u1ed9 b\u1ea3o v\u1ec7 ng\u0103n ng\u1eeba gi\u1ebft ch\u00f3c \u0111\u1ed9ng c\u01a1<\/h2>\n<p>Hi\u1ec3u K\u1ebb gi\u1ebft ng\u01b0\u1eddi kh\u1edfi \u0111\u1ed9ng ngu\u1ed9i ng\u0103n ng\u1eeba gi\u1ebft ch\u00f3c \u0111\u1ed9ng c\u01a1. L\u1eadp b\u1ea3n \u0111\u1ed3 Ng\u00e2n s\u00e1ch nhi\u1ec7t ng\u0103n ng\u1eeba ph\u00e1 s\u1ea3n c\u00e1ch \u0111i\u1ec7n. Tr\u00e1nh s\u1ef1 an to\u00e0n sai l\u1ea7m c\u1ee7a vi\u1ec7c ch\u1eadm tr\u1ec5 ng\u0103n ng\u1eeba c\u00e1c s\u1ef1 c\u1ed1 th\u1ea3m kh\u1ed1c. R\u01a1 le qu\u00e1 t\u1ea3i ti\u1ebfp theo b\u1ea1n ch\u1ec9 \u0111\u1ecbnh s\u1ebd b\u1ea3o v\u1ec7 \u0111\u1ed9ng c\u01a1 c\u1ee7a b\u1ea1n ho\u1eb7c cung c\u1ea5p s\u1ef1 an to\u00e0n sai l\u1ea7m trong khi n\u00f3 t\u1ef1 ph\u00e1 h\u1ee7y. S\u1ef1 kh\u00e1c bi\u1ec7t kh\u00f4ng ph\u1ea3i l\u00e0 gi\u00e1 c\u1ee7a r\u01a1 le \u2013 m\u00e0 l\u00e0 hi\u1ec3u r\u1eb1ng b\u1ea3o v\u1ec7 nhanh h\u01a1n th\u01b0\u1eddng c\u00f3 ngh\u0129a l\u00e0 ho\u1ea1t \u0111\u1ed9ng an to\u00e0n h\u01a1n.<\/p>\n<p>Quy\u1ebft \u0111\u1ecbnh Class 10 so v\u1edbi Class 20 x\u00e1c \u0111\u1ecbnh xem b\u1ea1n c\u00f3 nh\u1eadn \u0111\u01b0\u1ee3c tin nh\u1eafn \u0111\u1ec3 \u0111i\u1ec1u tra m\u1ed9t chuy\u1ebfn \u0111i hay m\u1ed9t cu\u1ed9c g\u1ecdi kh\u1ea9n c\u1ea5p l\u00fac 2 gi\u1edd s\u00e1ng r\u1eb1ng s\u1ea3n xu\u1ea5t \u0111\u00e3 ng\u1eebng ho\u1ea1t \u0111\u1ed9ng. Ch\u1ecdn lo\u1ea1i ng\u1eaft tr\u01b0\u1edbc khi h\u01b0 h\u1ecfng nhi\u1ec7t x\u1ea3y ra, kh\u00f4ng ph\u1ea3i lo\u1ea1i cho b\u1ea1n nhi\u1ec1u th\u1eddi gian nh\u1ea5t \u0111\u1ec3 xem s\u1ef1 ph\u00e1 h\u1ee7y di\u1ec5n ra. Ng\u00e2n s\u00e1ch nhi\u1ec7t c\u1ee7a \u0111\u1ed9ng c\u01a1 c\u1ee7a b\u1ea1n l\u00e0 h\u1eefu h\u1ea1n. Chi ti\u00eau n\u00f3 m\u1ed9t c\u00e1ch kh\u00f4n ngoan, ho\u1eb7c K\u1ebb gi\u1ebft ng\u01b0\u1eddi kh\u1edfi \u0111\u1ed9ng ngu\u1ed9i s\u1ebd thu n\u1ee3 v\u1edbi l\u00e3i su\u1ea5t.<\/p>\n<p><strong>M\u1eb9o chuy\u00ean nghi\u1ec7p #4: B\u1eaby gi\u1ea3m \u0111\u1ecbnh m\u1ee9c nhi\u1ec7t \u0111\u1ed9:<\/strong> C\u1ee9 kho\u1ea3ng 10\u00b0C tr\u00ean nhi\u1ec7t \u0111\u1ed9 m\u00f4i tr\u01b0\u1eddng 40\u00b0C s\u1ebd c\u01b0\u1edbp \u0111i 2-6% c\u00f4ng su\u1ea5t c\u1ee7a r\u01a1 le qu\u00e1 t\u1ea3i c\u1ee7a b\u1ea1n (t\u00f9y thu\u1ed9c v\u00e0o nh\u00e0 s\u1ea3n xu\u1ea5t). B\u1ea3ng \u0111i\u1ec1u khi\u1ec3n \u0111\u00f3 \u0111\u1ea1t 60\u00b0C v\u00e0o bu\u1ed5i chi\u1ec1u? R\u01a1 le Class 20 25A c\u1ee7a b\u1ea1n c\u00f3 th\u1ec3 ho\u1ea1t \u0111\u1ed9ng g\u1ea7n h\u01a1n v\u1edbi c\u00f4ng su\u1ea5t hi\u1ec7u d\u1ee5ng 21-23A. Nh\u01b0ng \u0111\u1ed9ng c\u01a1 c\u1ee7a b\u1ea1n v\u1eabn \u0111ang h\u00fat 24A. Ph\u00e9p to\u00e1n kh\u00f4ng ho\u1ea1t \u0111\u1ed9ng v\u00e0 \u0111\u1ed9ng c\u01a1 c\u1ee7a b\u1ea1n \u0111ang s\u1ed1ng nh\u1edd th\u1eddi gian vay m\u01b0\u1ee3n.<\/p>\n<p>B\u1ea3o v\u1ec7 \u0111\u1ed9ng c\u01a1 kh\u00f4ng ph\u1ea3i l\u00e0 ch\u1ecdn lo\u1ea1i c\u00f3 th\u1eddi gian d\u00e0i nh\u1ea5t \u2013 m\u00e0 l\u00e0 hi\u1ec3u r\u1eb1ng ng\u00e2n s\u00e1ch nhi\u1ec7t c\u1ee7a \u0111\u1ed9ng c\u01a1 c\u1ee7a b\u1ea1n c\u1ea1n ki\u1ec7t nhanh h\u01a1n b\u1ea1n ngh\u0129, \u0111\u1eb7c bi\u1ec7t khi Thu\u1ebf 10\u00b0C v\u00e0 K\u1ebb gi\u1ebft ng\u01b0\u1eddi kh\u1edfi \u0111\u1ed9ng ngu\u1ed9i ho\u1ea1t \u0111\u1ed9ng c\u00f9ng nhau. B\u1ea3o v\u1ec7 Class 10 theo d\u00f5i ng\u00e2n s\u00e1ch nhi\u1ec7t c\u1ee7a b\u1ea1n v\u00e0 d\u1eebng r\u00fat ti\u1ec1n tr\u01b0\u1edbc khi b\u1ea1n th\u1ea5u chi. Class 20 cho b\u1ea1n chi ti\u00eau kh\u00f4ng gi\u1edbi h\u1ea1n cho \u0111\u1ebfn khi t\u00e0i kho\u1ea3n tr\u1ed1ng r\u1ed7ng v\u00e0 \u0111\u1ed9ng c\u01a1 ch\u1ebft. L\u1ef1a ch\u1ecdn ng\u0103n ng\u1eeba v\u1ee5 gi\u1ebft ch\u00f3c \u0111\u1ed9ng c\u01a1 $50.000 ti\u1ebfp theo l\u00e0 l\u1ef1a ch\u1ecdn t\u00f4n tr\u1ecdng ng\u00e2n s\u00e1ch nhi\u1ec7t, kh\u00f4ng ph\u1ea3i l\u1ef1a ch\u1ecdn b\u1ecf qua n\u00f3.<\/p>\n<\/div>","protected":false},"excerpt":{"rendered":"<p>Six months later, your motor screams to a halt. The 200 HP unit that drove your main production line is cooked &#8211; windings blackened, insulation crumbled, the stator housing still radiating heat like an industrial crematorium. Your Class 20 overload relay watched the murder unfold. Never lifted a finger. All because six months ago, you [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":19750,"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-19745","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\/19745","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=19745"}],"version-history":[{"count":3,"href":"https:\/\/test.viox.com\/vi\/wp-json\/wp\/v2\/posts\/19745\/revisions"}],"predecessor-version":[{"id":19751,"href":"https:\/\/test.viox.com\/vi\/wp-json\/wp\/v2\/posts\/19745\/revisions\/19751"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/test.viox.com\/vi\/wp-json\/wp\/v2\/media\/19750"}],"wp:attachment":[{"href":"https:\/\/test.viox.com\/vi\/wp-json\/wp\/v2\/media?parent=19745"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/test.viox.com\/vi\/wp-json\/wp\/v2\/categories?post=19745"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/test.viox.com\/vi\/wp-json\/wp\/v2\/tags?post=19745"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}