{"id":1647,"date":"2026-08-29T10:56:09","date_gmt":"2026-08-29T10:56:09","guid":{"rendered":"https:\/\/benlongkj.com\/?p=1647"},"modified":"2026-08-28T23:59:18","modified_gmt":"2026-08-28T23:59:18","slug":"thermal-calibration","status":"publish","type":"post","link":"https:\/\/benlongkj.com\/vi\/blog\/thermal-calibration\/","title":{"rendered":"Hi\u1ec7u Chu\u1ea9n Nhi\u1ec7t L\u00e0 G\u00ec V\u00e0 T\u1ea1i Sao C\u00e1c Nh\u00e0 S\u1ea3n Xu\u1ea5t MCB V\u00e0 MCCB C\u1ea7n N\u00f3?"},"content":{"rendered":"<p>Trong m\u1ed9t nh\u00e0 m\u00e1y s\u1ea3n xu\u1ea5t c\u1ea7u dao, kho\u1ea3nh kh\u1eafc quy\u1ebft \u0111\u1ecbnh xem m\u1ed9t MCB ho\u00e0n ch\u1ec9nh c\u00f3 an to\u00e0n hay b\u1ecb lo\u1ea1i b\u1ecf l\u00e0 <strong>thermal calibration<\/strong>. \u0110\u00e2y l\u00e0 b\u01b0\u1edbc m\u00e0 ph\u1ea7n t\u1eed l\u01b0\u1ee1ng kim b\u00ean trong m\u1ed7i c\u1ea7u dao \u0111\u01b0\u1ee3c c\u1eaft t\u1ec9a v\u00e0 ki\u1ec3m tra \u0111\u1ec3 thi\u1ebft b\u1ecb ng\u1eaft m\u1ea1ch trong kho\u1ea3ng th\u1eddi gian ch\u00ednh x\u00e1c theo ti\u00eau chu\u1ea9n y\u00eau c\u1ea7u \u2014 kh\u00f4ng s\u1edbm h\u01a1n m\u1ed9t gi\u00e2y, kh\u00f4ng mu\u1ed9n h\u01a1n m\u1ed9t gi\u00e2y. Ng\u01b0\u1eddi mua th\u01b0\u1eddng g\u1ecdi giai \u0111o\u1ea1n n\u00e0y l\u00e0 ki\u1ec3m tra \u0111\u1ed9 tr\u1ec5, v\u00ec \u0111i\u1ec1u th\u1ef1c s\u1ef1 \u0111\u01b0\u1ee3c \u0111o l\u00e0 <em>th\u1eddi gian<\/em> m\u1ed9t c\u1ea7u dao m\u1ea5t \u0111\u1ec3 ng\u1eaft m\u1ea1ch \u1edf m\u1ee9c qu\u00e1 d\u00f2ng nh\u1ea5t \u0111\u1ecbnh. \u0110\u1ed1i v\u1edbi c\u00e1c nh\u00e0 s\u1ea3n xu\u1ea5t MCB, MCCB v\u00e0 RCBO xu\u1ea5t kh\u1ea9u v\u00e0o c\u00e1c th\u1ecb tr\u01b0\u1eddng y\u00eau c\u1ea7u tu\u00e2n th\u1ee7 IEC, vi\u1ec7c th\u1ef1c hi\u1ec7n \u0111\u00fang giai \u0111o\u1ea1n n\u00e0y l\u00e0 s\u1ef1 kh\u00e1c bi\u1ec7t gi\u1eefa m\u1ed9t s\u1ea3n ph\u1ea9m b\u1ea3o v\u1ec7 m\u1ea1ch v\u00e0 m\u1ed9t s\u1ea3n ph\u1ea9m kh\u00f4ng \u0111\u1ea1t ki\u1ec3m tra. B\u00e0i vi\u1ebft n\u00e0y gi\u1ea3i th\u00edch v\u1ec1 <strong>hi\u1ec7u chu\u1ea9n nhi\u1ec7t MCB<\/strong> th\u1ef1c s\u1ef1 l\u00e0 g\u00ec, c\u00e1ch ki\u1ec3m tra \u0111\u1ed9 tr\u1ec5 \u0111\u01b0\u1ee3c chia th\u00e0nh x\u00e1c minh th\u1eddi gian d\u00e0i v\u00e0 th\u1eddi gian ng\u1eafn, l\u00fd do t\u1ea1i sao c\u00e1c \u0111\u01b0\u1eddng cong B, C v\u00e0 D c\u00f3 ti\u00eau ch\u00ed \u0111\u1ea1t kh\u00e1c nhau theo IEC 60898-1, v\u00e0 thi\u1ebft b\u1ecb n\u00e0o v\u1eadn h\u00e0nh quy tr\u00ecnh n\u00e0y tr\u00ean d\u00e2y chuy\u1ec1n s\u1ea3n xu\u1ea5t hi\u1ec7n \u0111\u1ea1i.<\/p>\n<p><em>B\u1edfi Huang Xiaolei | Benlong Automation<\/em><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-1649\" src=\"https:\/\/benlongkj.com\/wp-content\/uploads\/2026\/08\/Thermal-vs-Magnetic-Trip-Testing.webp\" alt=\"\" width=\"1448\" height=\"1086\" \/><\/p>\n<h2>Hi\u1ec7u Chu\u1ea9n Nhi\u1ec7t L\u00e0 G\u00ec Trong S\u1ea3n Xu\u1ea5t C\u1ea7u Dao?<\/h2>\n<p>K\u1ef9 thu\u1eadt ng\u1eaft nhi\u1ec7t-t\u1eeb \u0111\u01b0\u1ee3c \u00e1p d\u1ee5ng b\u1edfi h\u1ea7u h\u1ebft c\u00e1c c\u1ea7u dao \u0111i\u1ec7n \u00e1p th\u1ea5p. T\u00ecnh tr\u1ea1ng qu\u00e1 t\u1ea3i \u0111\u01b0\u1ee3c x\u1eed l\u00fd b\u1eb1ng d\u1ea3i l\u01b0\u1ee1ng kim, bao g\u1ed3m hai kim lo\u1ea1i \u0111\u1eb7t c\u1ea1nh nhau v\u1edbi t\u1ed1c \u0111\u1ed9 gi\u00e3n n\u1edf nhi\u1ec7t kh\u00e1c nhau. Khi d\u00f2ng \u0111i\u1ec7n v\u01b0\u1ee3t qu\u00e1 gi\u1edbi h\u1ea1n quy \u0111\u1ecbnh, d\u1ea3i kim lo\u1ea1i s\u1ebd n\u00f3ng l\u00ean, u\u1ed1n cong v\u1ec1 ph\u00eda kim lo\u1ea1i gi\u00e3n n\u1edf ch\u1eadm h\u01a1n. L\u01b0\u1ee3ng u\u1ed1n cong th\u00edch h\u1ee3p s\u1ebd khi\u1ebfn d\u1ea3i kim lo\u1ea1i nh\u1ea3 ch\u1ed1t ng\u1eaft. Sau khi qu\u00e1 t\u1ea3i, d\u00f2ng \u0111i\u1ec7n c\u00e0ng cao, b\u1ed9 gia nhi\u1ec7t c\u00e0ng nhanh n\u00f3ng, do \u0111\u00f3 ng\u1eaft m\u1ea1ch c\u00e0ng nhanh x\u1ea3y ra. T\u00ednh n\u0103ng n\u00e0y ch\u1ee9ng minh r\u1eb1ng hi\u1ec7u chu\u1ea9n nhi\u1ec7t l\u00e0 to\u00e0n b\u1ed9 qu\u00e1 tr\u00ecnh s\u1ea3n xu\u1ea5t c\u1ea7u dao li\u00ean quan \u0111\u1ebfn vi\u1ec7c \u0111i\u1ec1u ch\u1ec9nh d\u1ea3i l\u01b0\u1ee1ng kim, c\u00f3 th\u1ec3 l\u00e0 u\u1ed1n cong, trong tr\u01b0\u1eddng h\u1ee3p n\u00e0y v\u00edt s\u1ebd \u0111\u01b0\u1ee3c \u0111i\u1ec1u ch\u1ec9nh ho\u1eb7c li\u00ean k\u1ebft ng\u1eaft s\u1ebd \u0111\u01b0\u1ee3c di chuy\u1ec3n \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o th\u1eddi gian ng\u1eaft n\u1eb1m trong ph\u1ea1m vi \u0111\u00e3 \u0111\u1ecbnh tr\u01b0\u1edbc b\u1edfi ti\u00eau chu\u1ea9n hi\u1ec7n h\u00e0nh cho m\u1ed7i d\u00f2ng th\u1eed nghi\u1ec7m.<\/p>\n<p>T\u1ea7m quan tr\u1ecdng c\u1ee7a n\u00f3 kh\u00f4ng th\u1ec3 \u0111\u00e1nh gi\u00e1 th\u1ea5p, v\u00ec n\u00f3 gi\u00fap ph\u00e2n bi\u1ec7t r\u00f5 c\u00e1c thu\u1eadt ng\u1eef d\u1ec5 b\u1ecb nh\u1ea7m l\u1eabn. Hi\u1ec7u chu\u1ea9n c\u00f3 ngh\u0129a l\u00e0 \u0111i\u1ec1u ch\u1ec9nh c\u01a1 ch\u1ebf \u0111\u1ec3 \u0111\u1ea1t \u0111\u01b0\u1ee3c kho\u1ea3ng th\u1eddi gian m\u1ee5c ti\u00eau ho\u1eb7c x\u00e1c minh r\u1eb1ng n\u00f3 \u0111\u1ea1t \u0111\u1ebfn \u0111i\u1ec3m \u0111\u00f3. Th\u1ef1c t\u1ebf, hai qu\u00e1 tr\u00ecnh n\u00e0y di\u1ec5n ra \u0111\u1ed3ng th\u1eddi, khi ng\u01b0\u1eddi v\u1eadn h\u00e0nh c\u1ea5p d\u00f2ng \u0111i\u1ec7n v\u00e0 \u0111o th\u1eddi gian tr\u01b0\u1edbc khi \u0111i\u1ec1u ch\u1ec9nh d\u1ea3i kim lo\u1ea1i \u0111\u1ec3 ki\u1ec3m tra l\u1ea1i thi\u1ebft b\u1ecb v\u00ec m\u1ed9t s\u1ef1 th\u1eadt quan tr\u1ecdng c\u1ea7n nh\u1edb l\u00e0 t\u00ednh ch\u1ea5t c\u01a1 h\u1ecdc v\u00e0 v\u1eadt li\u1ec7u kh\u00e1c nhau \u0111\u1ed1i v\u1edbi m\u1ed7i d\u1ea3i l\u01b0\u1ee1ng kim, d\u1eabn \u0111\u1ebfn s\u1ef1 c\u1ea7n thi\u1ebft ph\u1ea3i hi\u1ec7u chu\u1ea9n ri\u00eang bi\u1ec7t ngay t\u1eeb \u0111\u1ea7u. M\u1ed9t thi\u1ebft b\u1ecb l\u1ed7i kh\u00f4ng \u0111\u00e1p \u1ee9ng y\u00eau c\u1ea7u hi\u1ec7u chu\u1ea9n c\u00f3 th\u1ec3 ng\u1eaft m\u1ea1ch trong ch\u1ebf \u0111\u1ed9 ho\u1ea1t \u0111\u1ed9ng b\u00ecnh th\u01b0\u1eddng ho\u1eb7c, t\u1ec7 h\u01a1n, b\u1ecb k\u1eb9t trong qu\u00e1 tr\u00ecnh qu\u00e1 t\u1ea3i.<\/p>\n<p>Do \u0111\u00f3, hai \u0111\u1eb7c t\u00ednh \u0111\u01b0\u1ee3c xem x\u00e9t trong qu\u00e1 tr\u00ecnh n\u00e0y \u2014 \u0111\u1ed9 ch\u00ednh x\u00e1c v\u00e0 kh\u1ea3 n\u0103ng l\u1eb7p l\u1ea1i c\u1ee7a \u0111\u1ea7u ra. M\u1ed9t chi ti\u1ebft quan tr\u1ecdng l\u00e0 n\u1ebfu c\u00f3 b\u1ea5t k\u1ef3 v\u1ea5n \u0111\u1ec1 n\u00e0o v\u1edbi thi\u1ebft b\u1ecb, c\u00e1c nh\u00e2n vi\u00ean v\u1eadn h\u00e0nh s\u1ebd c\u00f3 th\u1ec3 ki\u1ec3m tra ng\u1eaft m\u1ea1ch t\u1eeb tr\u1ea1ng th\u00e1i kh\u1edfi \u0111\u1ed9ng l\u1ea1nh. Ph\u1ea1m vi \u0111i\u1ec1u ch\u1ec9nh kh\u00e1 nghi\u00eam ng\u1eb7t, th\u01b0\u1eddng l\u00e0 v\u00e0i ph\u1ea7n tr\u0103m t\u1ea1i d\u00f2ng ng\u1eaft, \u0111i\u1ec1u n\u00e0y c\u00f3 ngh\u0129a l\u00e0 ph\u1ea1m vi sai s\u1ed1 cho b\u00e0n th\u1eed nghi\u1ec7m ph\u1ea3i nh\u1ecf h\u01a1n nhi\u1ec1u so v\u1edbi thi\u1ebft b\u1ecb hi\u1ec7u chu\u1ea9n. \u0110i\u1ec1u n\u00e0y gi\u1ea3i th\u00edch s\u1ef1 c\u1ea7n thi\u1ebft c\u1ee7a thi\u1ebft b\u1ecb hi\u1ec7u chu\u1ea9n \u0111\u00e1ng tin c\u1eady \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o ho\u1ea1t \u0111\u1ed9ng hi\u1ec7u qu\u1ea3 c\u1ee7a thi\u1ebft b\u1ecb.<\/p>\n<h2>Hai ch\u1ee9c n\u0103ng ng\u1eaft m\u1ea1ch \u0111\u1eb1ng sau m\u1ed7i b\u00e0i ki\u1ec3m tra tr\u1ec5<\/h2>\n<p>\u0110\u1ec3 hi\u1ec3u t\u1ea1i sao b\u00e0i ki\u1ec3m tra tr\u1ec5 \u0111\u01b0\u1ee3c chia th\u00e0nh hai ph\u1ea7n, ch\u00fang ta ph\u1ea3i hi\u1ec3u r\u1eb1ng c\u00f3 hai t\u00ednh n\u0103ng b\u1ea3o v\u1ec7 \u0111\u1ed9c l\u1eadp trong b\u1ed9 ng\u1eaft m\u1ea1ch. B\u1ea3o v\u1ec7 nhi\u1ec7t, hay b\u1ea3o v\u1ec7 qu\u00e1 t\u1ea3i, \u0111\u1ebfn t\u1eeb d\u1ea3i kim lo\u1ea1i k\u00e9p, ph\u1ea3n \u1ee9ng ch\u1eadm r\u00e3i, t\u1eeb v\u00e0i gi\u00e2y \u0111\u1ebfn v\u00e0i gi\u1edd, do \u0111\u00f3 t\u1ea1o th\u00e0nh ph\u1ea7n th\u1eddi gian d\u00e0i trong \u0111\u01b0\u1eddng cong ng\u1eaft. \u0110\u00e2y l\u00e0 ph\u1ea7n \u0111\u01b0\u1ee3c thi\u1ebft l\u1eadp b\u1edfi \u0111\u1eb7c t\u00ednh nhi\u1ec7t. B\u1ea3o v\u1ec7 t\u1eeb t\u00ednh ho\u1eb7c b\u1ea3o v\u1ec7 ng\u1eafn m\u1ea1ch \u0111\u1ebfn t\u1eeb nam ch\u00e2m \u0111i\u1ec7n ho\u1eb7c solenoid, ph\u1ea3n \u1ee9ng v\u1edbi t\u1ed1c \u0111\u1ed9 mili gi\u00e2y \u0111\u1ed1i v\u1edbi d\u00f2ng l\u1ed7i cao, do \u0111\u00f3 t\u1ea1o th\u00e0nh ph\u1ea7n th\u1eddi gian ng\u1eafn ho\u1eb7c t\u1ee9c th\u1eddi c\u1ee7a \u0111\u01b0\u1eddng cong.<\/p>\n<p>N\u1ebfu ch\u00fang ta nh\u00ecn v\u00e0o \u0111\u1ed3 th\u1ecb log-log th\u1eddi gian-d\u00f2ng \u0111i\u1ec7n \u0111\u01b0\u1ee3c c\u00f4ng b\u1ed1 b\u1edfi m\u1ed7i nh\u00e0 s\u1ea3n xu\u1ea5t, ch\u00fang ta th\u1ea5y khu v\u1ef1c nhi\u1ec7t t\u01b0\u01a1ng \u1ee9ng v\u1edbi ph\u1ea7n d\u1ed1c tr\u00ean c\u1ee7a \u0111\u01b0\u1eddng cong trong khi khu v\u1ef1c t\u1eeb t\u00ednh t\u01b0\u01a1ng \u1ee9ng v\u1edbi ph\u1ea7n g\u1ea7n nh\u01b0 th\u1eb3ng \u0111\u1ee9ng ph\u00eda d\u01b0\u1edbi. Trong th\u1ef1c t\u1ebf s\u1ea3n xu\u1ea5t, hai \u0111\u1eb7c t\u00ednh n\u00e0y \u0111\u01b0\u1ee3c ki\u1ec3m tra v\u1edbi c\u00e1c d\u00f2ng \u0111i\u1ec7n kh\u00e1c nhau, dung sai th\u1eddi gian kh\u00e1c nhau v\u00e0 \u0111\u00f4i khi v\u1edbi c\u00e1c b\u00e0n th\u1eed nghi\u1ec7m kh\u00e1c nhau. \u0110\u00e2y l\u00e0 l\u00fd do t\u1ea1i sao c\u00f3 s\u1ef1 ph\u00e2n chia tr\u1ec5 d\u00e0i v\u00e0 tr\u1ec5 ng\u1eafn: \u0111\u1eb7c t\u00ednh tr\u1ec5 d\u00e0i ki\u1ec3m tra d\u1ea3i kim lo\u1ea1i k\u00e9p nhi\u1ec7t, v\u00e0 tr\u1ec5 ng\u1eafn ho\u1eb7c t\u1ee9c th\u1eddi ki\u1ec3m tra cu\u1ed9n d\u00e2y t\u1eeb t\u00ednh. V\u00ec v\u1eady, vi\u1ec7c gi\u1eef hai lo\u1ea1i n\u00e0y ri\u00eang bi\u1ec7t l\u00e0 c\u1ef1c k\u1ef3 quan tr\u1ecdng.<\/p>\n<h2>Ki\u1ec3m tra tr\u1ec5 d\u00e0i: Tr\u1ecdng t\u00e2m c\u1ee7a hi\u1ec7u chu\u1ea9n nhi\u1ec7t<\/h2>\n<p>B\u00e0i ki\u1ec3m tra tr\u1ec5 d\u00e0i l\u00e0 tr\u00e1i tim c\u1ee7a <strong>hi\u1ec7u chu\u1ea9n nhi\u1ec7t b\u1ed9 ng\u1eaft m\u1ea1ch<\/strong>. N\u00f3 x\u00e1c nh\u1eadn vi\u1ec7c k\u00edch ho\u1ea1t d\u1ea3i kim lo\u1ea1i k\u00e9p \u0111\u00fang th\u1eddi gian d\u01b0\u1edbi c\u00e1c d\u00f2ng \u0111i\u1ec7n qu\u00e1 t\u1ea3i \u0111\u01b0\u1ee3c ch\u1ec9 \u0111\u1ecbnh. Theo ti\u00eau chu\u1ea9n IEC 60898-1, t\u1ea5t c\u1ea3 c\u00e1c b\u00e0i ki\u1ec3m tra ph\u1ea3i \u0111\u01b0\u1ee3c ti\u1ebfn h\u00e0nh trong \u0111i\u1ec1u ki\u1ec7n nhi\u1ec7t \u0111\u1ed9 kh\u00f4ng kh\u00ed +30\u00a0\u00b0C v\u00e0 t\u1eeb \u0111i\u1ec3m kh\u1edfi \u0111\u1ed9ng l\u1ea1nh; \u0111\u1eb7c t\u00ednh d\u00f2ng \u0111i\u1ec7n \u0111\u01b0\u1ee3c hi\u1ec3n th\u1ecb cho ba \u0111i\u1ec3m qu\u00e1 t\u1ea3i, gi\u1eef nguy\u00ean cho t\u1ea5t c\u1ea3 c\u00e1c \u0111\u01b0\u1eddng cong B, C v\u00e0 D.<\/p>\n<table>\n<thead>\n<tr>\n<th>d\u00f2ng \u0111i\u1ec7n th\u1eed nghi\u1ec7m<\/th>\n<th>Y\u00eau c\u1ea7u<\/th>\n<th>Th\u1eddi gian th\u00f4ng th\u01b0\u1eddng<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>13 \u00d7 In (d\u00f2ng kh\u00f4ng ng\u1eaft th\u00f4ng th\u01b0\u1eddng)<\/td>\n<td>Kh\u00f4ng \u0111\u01b0\u1ee3c ng\u1eaft trong th\u1eddi gian th\u00f4ng th\u01b0\u1eddng<\/td>\n<td>\u2265 1 gi\u1edd (In \u2264 63 A); \u2265 2 gi\u1edd (In &gt; 63 A)<\/td>\n<\/tr>\n<tr>\n<td>45 \u00d7 In (d\u00f2ng ng\u1eaft th\u00f4ng th\u01b0\u1eddng)<\/td>\n<td>Ph\u1ea3i ng\u1eaft trong th\u1eddi gian th\u00f4ng th\u01b0\u1eddng<\/td>\n<td>&lt; 1 gi\u1edd (In \u2264 63 A);  63 A)<\/td>\n<\/tr>\n<tr>\n<td>55 \u00d7 In<\/td>\n<td>Ph\u1ea3i ng\u1eaft trong kho\u1ea3ng th\u1eddi gian quy \u0111\u1ecbnh<\/td>\n<td>1 gi\u00e2y \u0111\u1ebfn 60 gi\u00e2y (In \u2264 32 A); 1 gi\u00e2y \u0111\u1ebfn 120 gi\u00e2y (In &gt; 32 A)<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>C\u1eb7p 1.13 \u00d7 v\u00e0 1.45 \u00d7 thi\u1ebft l\u1eadp gi\u1edbi h\u1ea1n hi\u1ec7u su\u1ea5t qu\u00e1 t\u1ea3i ch\u1ea5p nh\u1eadn \u0111\u01b0\u1ee3c c\u1ee7a b\u1ed9 ng\u1eaft m\u1ea1ch; trong khi b\u1ed9 ng\u1eaft m\u1ea1ch ph\u1ea3i ch\u1ecbu \u0111\u01b0\u1ee3c qu\u00e1 t\u1ea3i nh\u1eb9 h\u01a1n 13% m\u00e0 kh\u00f4ng b\u1ecb ng\u1eaft sai, n\u00f3 c\u1ea7n c\u00f3 kh\u1ea3 n\u0103ng ng\u1eaft ngay c\u1ea3 qu\u00e1 t\u1ea3i 45% theo c\u00e1ch th\u00f4ng th\u01b0\u1eddng. Nh\u1eefng y\u1ebfu t\u1ed1 n\u00e0y x\u00e1c \u0111\u1ecbnh v\u1ecb tr\u00ed c\u1ee7a \u0111\u01b0\u1eddng cong nhi\u1ec7t tr\u00ean bi\u1ec3u \u0111\u1ed3. . L\u00fd do duy nh\u1ea5t khi\u1ebfn th\u1eddi gian truy\u1ec1n th\u1ed1ng thay \u0111\u1ed5i t\u1eeb m\u1ed9t gi\u1edd th\u00e0nh hai gi\u1edd sau 63 A l\u00e0 c\u00e1c b\u1ed9 ng\u1eaft m\u1ea1ch l\u1edbn h\u01a1n c\u00f3 ti\u1ebfp \u0111i\u1ec3m l\u1edbn h\u01a1n c\u00f3 dung l\u01b0\u1ee3ng nhi\u1ec7t l\u1edbn h\u01a1n nhi\u1ec1u v\u00e0 m\u1ea5t nhi\u1ec1u th\u1eddi gian h\u01a1n \u0111\u1ec3 tr\u1edf n\u00ean \u1ed5n \u0111\u1ecbnh.<\/p>\n<p>V\u1ec1 s\u1ea3n xu\u1ea5t, \u0111i\u1ec3m 2.55 \u00d7 In \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng th\u1ef1c t\u1ebf \u0111\u1ec3 hi\u1ec7u chu\u1ea9n b\u1ed9 ng\u1eaft m\u1ea1ch v\u00ec n\u00f3 cho ph\u00e9p \u0111o th\u1eddi gian ng\u1eaft trong gi\u00e2y thay v\u00ec gi\u1edd theo c\u00e1c ph\u00e9p \u0111o truy\u1ec1n th\u1ed1ng. Do \u0111\u00f3, m\u1ed9t l\u01b0\u1ee3ng d\u00f2ng \u0111i\u1ec7n c\u1ee5 th\u1ec3 c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c truy\u1ec1n qua b\u1ed9 ng\u1eaft m\u1ea1ch trong khi \u0111o th\u1eddi gian ng\u1eaft \u0111\u1ec3 \u0111i\u1ec1u ch\u1ec9nh th\u1eddi gian n\u00e0y b\u1eb1ng servo ho\u1eb7c ng\u01b0\u1eddi v\u1eadn h\u00e0nh. C\u00e1c ph\u00e9p \u0111o t\u1ed1n nhi\u1ec1u th\u1eddi gian h\u01a1n \u0111\u01b0\u1ee3c th\u1ef1c hi\u1ec7n b\u1eb1ng c\u00e1ch s\u1eed d\u1ee5ng c\u00e1c \u0111i\u1ec3m 1.13 \u00d7 v\u00e0 1.45 \u00d7 h\u1ed7 tr\u1ee3 c\u00e1c k\u1ebft qu\u1ea3 thu \u0111\u01b0\u1ee3c \u1edf tr\u00ean.<\/p>\n<p>Benlong x\u00e2y d\u1ef1ng thi\u1ebft b\u1ecb ch\u00ednh x\u00e1c cho giai \u0111o\u1ea1n n\u00e0y. The <a href=\"https:\/\/benlongkj.com\/vi\/mcb-long-time-thermal-calibration-bench-product\/\">B\u00e0n hi\u1ec7u chu\u1ea9n nhi\u1ec7t l\u00e2u d\u00e0i MCB<\/a> th\u1ef1c hi\u1ec7n ki\u1ec3m tra qu\u00e1 t\u1ea3i theo IEC 60898-1 tr\u00ean nhi\u1ec1u tr\u1ea1m v\u1edbi ngu\u1ed3n d\u00f2ng \u0111i\u1ec7n \u1ed5n \u0111\u1ecbnh cao, trong khi b\u00e0n hi\u1ec7u chu\u1ea9n ng\u1eaft nhi\u1ec7t b\u00e1n t\u1ef1 \u0111\u1ed9ng <a href=\"https:\/\/benlongkj.com\/vi\/mcb-semi-automatic-thermal-trip-calibration-bench-type-a-product\/\">lo\u1ea1i A<\/a> v\u00e0 phi\u00ean b\u1ea3n d\u1ef1a tr\u00ean th\u1ebb c\u1ee7a n\u00f3 <a href=\"https:\/\/benlongkj.com\/vi\/mcb-semi-automatic-thermal-trip-calibration-bench-type-b-product\/\">lo\u1ea1i B<\/a> x\u1eed l\u00fd hi\u1ec7u chu\u1ea9n qu\u00e1 t\u1ea3i l\u1eadp tr\u00ecnh v\u1edbi chuy\u1ec3n \u0111\u1ed5i nhanh gi\u1eefa c\u00e1c d\u00f2ng MCB. \u0110\u1ed1i v\u1edbi MCCB theo IEC 60947-2, c\u00e1c \u0111i\u1ec3m tham chi\u1ebfu thay \u0111\u1ed5i \u2014 d\u00f2ng kh\u00f4ng ng\u1eaft th\u00f4ng th\u01b0\u1eddng tr\u1edf th\u00e0nh 1.05 \u00d7 In v\u00e0 d\u00f2ng ng\u1eaft th\u00f4ng th\u01b0\u1eddng 1.3 \u00d7 In \u2014 nh\u01b0ng nguy\u00ean t\u1eafc hi\u1ec7u chu\u1ea9n kh\u00f4ng thay \u0111\u1ed5i.<\/p>\n<h2>Ki\u1ec3m tra Tr\u1ec5 Ng\u1eafn v\u00e0 Ngay L\u1eadp T\u1ee9c: N\u01a1i B, C v\u00e0 D Kh\u00e1c Bi\u1ec7t<\/h2>\n<p>Ph\u1ea7n th\u1ee9 hai c\u1ee7a b\u00e0i ki\u1ec3m tra tr\u1ec5 \u0111\u00e1nh gi\u00e1 ph\u1ea7n t\u1eed t\u1eeb t\u00ednh ho\u1eb7c ph\u1ea3n \u1ee9ng ng\u1eafn m\u1ea1ch. \u0110\u00e2y l\u00e0 \u0111i\u1ec1u kh\u00e1ch h\u00e0ng th\u01b0\u1eddng g\u1ecdi l\u00e0 ki\u1ec3m tra tr\u1ec5 ng\u1eafn ho\u1eb7c ki\u1ec3m tra tr\u1ec5 th\u1eddi gian v\u00e0 n\u01a1i c\u00e1c \u0111\u01b0\u1eddng cong B, C v\u00e0 D b\u1eaft \u0111\u1ea7u c\u00f3 h\u00e0nh vi kh\u00e1c nhau. M\u1ee9c \u0111\u1ed9 x\u1ea3y ra ng\u1eaft t\u1eeb t\u00ednh \u0111\u01b0\u1ee3c x\u00e1c \u0111\u1ecbnh b\u1edfi l\u01b0\u1ee3ng d\u00f2ng \u0111\u1ecbnh m\u1ee9c c\u1ea7n thi\u1ebft \u0111\u1ec3 ng\u1eaft b\u1ed9 ng\u1eaft theo quy \u01b0\u1edbc t\u1ee9c th\u1eddi 0.1 gi\u00e2y. M\u1ed9t b\u1ed9i s\u1ed1 th\u1ea5p h\u01a1n t\u01b0\u01a1ng \u1ee9ng v\u1edbi lo\u1ea1i \u0111\u01b0\u1eddng cong ch\u1ec9 ra d\u00f2ng \u0111i\u1ec7n m\u00e0 b\u1ed9 ng\u1eaft v\u1eabn ph\u1ea3i gi\u1eef ho\u1ea1t \u0111\u1ed9ng, v\u00e0 m\u1ed9t b\u1ed9i s\u1ed1 cao h\u01a1n ng\u1ee5 \u00fd n\u01a1i b\u1ed9 ng\u1eaft ph\u1ea3i ng\u1eaft.<\/p>\n<table>\n<thead>\n<tr>\n<th>Lo\u1ea1i \u0111\u01b0\u1eddng cong<\/th>\n<th>Kh\u00f4ng \u0111\u01b0\u1ee3c ng\u1eaft trong v\u00f2ng 0.1 gi\u00e2y t\u1ea1i<\/th>\n<th>Ph\u1ea3i ng\u1eaft trong v\u00f2ng 0.1 gi\u00e2y t\u1ea1i<\/th>\n<th>\u1ee8ng d\u1ee5ng \u0111i\u1ec3n h\u00ecnh<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>Lo\u1ea1i B<\/td>\n<td>3 \u00d7 Trong<\/td>\n<td>5 \u00d7 Trong<\/td>\n<td>T\u1ea3i tr\u1edf, c\u00e1p d\u00e0i, chi\u1ebfu s\u00e1ng<\/td>\n<\/tr>\n<tr>\n<td>Lo\u1ea1i C<\/td>\n<td>5 \u00d7 Trong<\/td>\n<td>10 \u00d7 Trong<\/td>\n<td>\u1ed4 c\u1eafm chung, \u0111\u1ed9ng c\u01a1 nh\u1ecf, t\u1ea3i h\u1ed7n h\u1ee3p<\/td>\n<\/tr>\n<tr>\n<td>Lo\u1ea1i D<\/td>\n<td>10 \u00d7 Trong<\/td>\n<td>20 \u00d7 Trong<\/td>\n<td>T\u1ea3i kh\u1edfi \u0111\u1ed9ng cao: m\u00e1y bi\u1ebfn \u00e1p, \u0111\u1ed9ng c\u01a1 l\u1edbn<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>Th\u1eed nghi\u1ec7m \u0111\u01b0\u1ee3c th\u1ef1c hi\u1ec7n trong hai giai \u0111o\u1ea1n theo t\u1eebng lo\u1ea1i \u0111\u01b0\u1eddng cong. \u0110\u1ea7u ti\u00ean, m\u1ed9t b\u00e0i ki\u1ec3m tra gi\u1eef x\u00e1c nh\u1eadn r\u1eb1ng b\u1ed9 ng\u1eaft m\u1ea1ch kh\u00f4ng nh\u1ea3y trong v\u00f2ng 0,1 gi\u00e2y \u1edf b\u1ed9i s\u1ed1 th\u1ea5p h\u01a1n \u2014 3 \u00d7 In cho B, 5 \u00d7 In cho C, 10 \u00d7 In cho D. Sau \u0111\u00f3, m\u1ed9t b\u00e0i ki\u1ec3m tra nh\u1ea3y x\u00e1c nh\u1eadn r\u1eb1ng n\u00f3 nh\u1ea3y trong v\u00f2ng 0,1 gi\u00e2y \u1edf b\u1ed9i s\u1ed1 cao h\u01a1n \u2014 l\u1ea7n l\u01b0\u1ee3t l\u00e0 5, 10 v\u00e0 20 \u00d7 In. L\u1ea5y v\u00ed d\u1ee5 m\u1ed9t b\u1ed9 ng\u1eaft m\u1ea1ch lo\u1ea1i C 16 A: n\u00f3 ph\u1ea3i ch\u1ecbu \u0111\u01b0\u1ee3c d\u00f2ng 80 A (5 \u00d7) m\u00e0 kh\u00f4ng nh\u1ea3y t\u1ee9c th\u1eddi, nh\u01b0ng ph\u1ea3i m\u1edf ngay l\u1eadp t\u1ee9c \u1edf d\u00f2ng 160 A (10 \u00d7). C\u00f9ng m\u1ed9t b\u1ed9 ng\u1eaft 16 A lo\u1ea1i B s\u1ebd nh\u1ea3y ngay l\u1eadp t\u1ee9c \u1edf d\u00f2ng 80 A, v\u00e0 lo\u1ea1i D s\u1ebd ch\u1ecbu \u0111\u01b0\u1ee3c l\u00ean \u0111\u1ebfn 320 A tr\u01b0\u1edbc khi nam ch\u00e2m t\u00e1c \u0111\u1ed9ng. S\u1ef1 kh\u00e1c bi\u1ec7t n\u00e0y ch\u00ednh l\u00e0 l\u00fd do t\u1ea1i sao vi\u1ec7c ch\u1ecdn \u0111\u01b0\u1eddng cong quy\u1ebft \u0111\u1ecbnh kh\u1ea3 n\u0103ng ch\u1ecbu d\u00f2ng kh\u1edfi \u0111\u1ed9ng v\u00e0 ph\u1ed1i h\u1ee3p h\u1ea1 ngu\u1ed3n: \u0111\u01b0\u1eddng cong D ch\u1ecbu \u0111\u01b0\u1ee3c s\u1ef1 t\u0103ng d\u00f2ng t\u1ea1m th\u1eddi c\u1ee7a \u0111\u1ed9ng c\u01a1 ho\u1eb7c bi\u1ebfn \u00e1p m\u00e0 \u0111\u01b0\u1eddng cong B s\u1ebd g\u00e2y nh\u1ea3y kh\u00f4ng mong mu\u1ed1n.<\/p>\n<p>C\u00f3 m\u1ed9t \u0111i\u1ec3m c\u1ea7n nh\u1ea5n m\u1ea1nh cho b\u1ea5t k\u1ef3 ai vi\u1ebft \u0111\u1eb7c t\u1ea3 th\u1eed nghi\u1ec7m. <span style=\"color: #991b1b;\">Ti\u00eau ch\u00ed \u0111\u1ea1t y\u00eau c\u1ea7u thay \u0111\u1ed5i gi\u1eefa B, C v\u00e0 D thu\u1ed9c v\u1ec1 ch\u1ee9c n\u0103ng nh\u1ea3y t\u1eeb t\u00ednh (nh\u1ea3y t\u1ee9c th\u1eddi), kh\u00f4ng ph\u1ea3i ch\u1ee9c n\u0103ng nh\u1ea3y qu\u00e1 t\u1ea3i nhi\u1ec7t.<\/span>. M\u1eb7t bimetal, t\u1ee9c l\u00e0 hi\u1ec7u chu\u1ea9n nhi\u1ec7t th\u1ef1c s\u1ef1, gi\u1ed1ng nhau cho c\u1ea3 ba lo\u1ea1i \u0111\u01b0\u1eddng cong. V\u00e0 trong m\u1ed9t MCB, ph\u1ea3n \u1ee9ng ng\u1eafn m\u1ea1ch n\u00e0y l\u00e0 t\u1ee9c th\u1eddi thay v\u00ec th\u1ef1c s\u1ef1 c\u00f3 \u0111\u1ed9 tr\u1ec5; thu\u1eadt ng\u1eef \u0111\u1ed9 tr\u1ec5 ng\u1eafn \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng m\u1ed9t c\u00e1ch l\u1ecfng l\u1ebbo tr\u00ean s\u00e0n s\u1ea3n xu\u1ea5t. M\u1ed9t d\u1ea3i \u0111\u1ed9 tr\u1ec5 ng\u1eafn th\u1ef1c s\u1ef1 v\u00e0 c\u00f3 ch\u1ee7 \u00fd ch\u1ec9 xu\u1ea5t hi\u1ec7n trong MCCB v\u1edbi b\u1ed9 ph\u1eadn nh\u1ea3y c\u00f3 th\u1ec3 \u0111i\u1ec1u ch\u1ec9nh, s\u1ebd \u0111\u01b0\u1ee3c \u0111\u1ec1 c\u1eadp ti\u1ebfp theo. \u0110\u1ed1i v\u1edbi ki\u1ec3m tra t\u1eeb t\u00ednh c\u1ee7a MCB v\u00e0 MCCB khung nh\u1ecf, Benlong\u2019s <a href=\"https:\/\/benlongkj.com\/vi\/mccb-manual-magnetic-trip-test-bench-product\/\">B\u1ec7 th\u1eed nghi\u1ec7m ng\u1eaft m\u1ea1ch t\u1eeb th\u1ee7 c\u00f4ng MCCB<\/a> \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf chuy\u00ean d\u1ee5ng, v\u1edbi ngu\u1ed3n d\u00f2ng 5\u201310 \u00d7 In c\u00f3 th\u1ec3 l\u1eadp tr\u00ecnh v\u00e0 th\u1eddi gian \u0111o \u1edf m\u1ee9c mili gi\u00e2y \u0111\u1ec3 \u0111\u01b0a ra \u0111\u00e1nh gi\u00e1 \u0111\u1ea1t\/kh\u00f4ng \u0111\u1ea1t r\u00f5 r\u00e0ng.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-1650\" src=\"https:\/\/benlongkj.com\/wp-content\/uploads\/2026\/08\/Thermal-calibration-workflow.webp\" alt=\"\" width=\"1448\" height=\"1086\" \/><\/p>\n<h2>Ti\u00eau chu\u1ea9n \u00e1p d\u1ee5ng: IEC 60898-1, 60947-2 v\u00e0 61009<\/h2>\n<p>Ti\u00eau ch\u00ed \u0111\u1ea1t ph\u00f9 h\u1ee3p ph\u1ee5 thu\u1ed9c v\u00e0o ti\u00eau chu\u1ea9n m\u00e0 s\u1ea3n ph\u1ea9m \u0111\u01b0\u1ee3c ch\u1ee9ng nh\u1eadn, v\u00e0 vi\u1ec7c \u00e1p d\u1ee5ng sai ti\u00eau chu\u1ea9n c\u00f3 th\u1ec3 g\u00e2y nguy hi\u1ec3m th\u1ef1c s\u1ef1 v\u1ec1 m\u1eb7t r\u1ee7i ro. MCB \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong c\u00e1c \u1ee9ng d\u1ee5ng d\u00e2n d\u1ee5ng v\u00e0 m\u00f4i tr\u01b0\u1eddng t\u01b0\u01a1ng t\u1ef1 \u00e1p d\u1ee5ng ti\u00eau chu\u1ea9n IEC 60898-1, quy \u0111\u1ecbnh c\u00e1c ph\u00e2n lo\u1ea1i B, C, D. Ti\u00eau chu\u1ea9n IEC 60947-2 \u0111i\u1ec1u ch\u1ec9nh vi\u1ec7c s\u1eed d\u1ee5ng MCCB v\u00e0 b\u1ed9 ng\u1eaft m\u1ea1ch c\u00f4ng nghi\u1ec7p, do \u0111\u00f3 c\u00f3 c\u00e1c d\u00f2ng \u0111\u1ecbnh m\u1ee9c truy\u1ec1n th\u1ed1ng (1,05 \u00d7 v\u00e0 1,3 \u00d7 In) v\u00e0 c\u00e1c t\u00ednh n\u0103ng linh ho\u1ea1t h\u01a1n. Ti\u00eau chu\u1ea9n IEC 61009-1 \u0111i\u1ec1u ch\u1ec9nh vi\u1ec7c s\u1eed d\u1ee5ng RCBO, ho\u1eb7c b\u1ed9 ng\u1eaft m\u1ea1ch d\u00f2ng r\u00f2, ngo\u00e0i vi\u1ec7c ph\u1ea3i tr\u1ea3i qua c\u00e1c th\u1eed nghi\u1ec7m d\u00f2ng r\u00f2 c\u00f2n ph\u1ea3i tr\u1ea3i qua c\u00e1c th\u1eed nghi\u1ec7m t\u01b0\u01a1ng t\u1ef1 nh\u01b0 MCB v\u1ec1 ho\u1ea1t \u0111\u1ed9ng nhi\u1ec7t v\u00e0 t\u1eeb t\u00ednh. M\u1ed9t c\u00f4ng t\u1eafc c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c ch\u1ee9ng nh\u1eadn theo c\u1ea3 hai ti\u00eau chu\u1ea9n, nh\u01b0ng tham chi\u1ebfu nhi\u1ec7t \u0111\u1ed9 c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c s\u1eafp x\u1ebfp kh\u00e1c nhau t\u00f9y theo ti\u00eau chu\u1ea9n s\u1eed d\u1ee5ng.<\/p>\n<p>Nhi\u1ec7t \u0111\u1ed9 tham chi\u1ebfu l\u00e0 m\u1ed9t trong nh\u1eefng y\u1ebfu t\u1ed1. Theo IEC 60898-1, hi\u1ec7u chu\u1ea9n \u0111\u01b0\u1ee3c th\u1ef1c hi\u1ec7n \u1edf 30 \u00b0C, trong khi thi\u1ebft b\u1ecb tu\u00e2n th\u1ee7 IEC 60947-2 \u0111\u01b0\u1ee3c th\u1eed nghi\u1ec7m \u1edf 40 \u00b0C. \u0110\u1ed3ng th\u1eddi, c\u00f9ng m\u1ed9t thi\u1ebft b\u1ecb c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c th\u1eed nghi\u1ec7m \u1edf c\u00e1c m\u1ee9c nhi\u1ec7t \u0111\u1ed9 kh\u00e1c nhau cho t\u1eebng ti\u00eau chu\u1ea9n \u0111\u00e3 n\u00eau. Nhi\u1ec7t \u0111\u1ed9 tham chi\u1ebfu c\u0169ng \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn b\u1ea3ng gi\u1ea3m t\u1ea3i \u0111\u01b0\u1ee3c ng\u01b0\u1eddi ti\u00eau d\u00f9ng s\u1eed d\u1ee5ng, v\u00ec v\u1eady n\u1ebfu b\u1ed9 ng\u1eaft \u0111\u01b0\u1ee3c th\u1eed nghi\u1ec7m v\u1edbi nhi\u1ec7t \u0111\u1ed9 tham chi\u1ebfu sai, n\u00f3 c\u00f3 th\u1ec3 b\u1ecb h\u1ecfng sau khi v\u01b0\u1ee3t qua c\u00e1c th\u1eed nghi\u1ec7m ti\u00eau chu\u1ea9n. Do \u0111\u00f3, vi\u1ec7c c\u1ed1 \u0111\u1ecbnh nhi\u1ec7t \u0111\u1ed9 trong qu\u00e1 tr\u00ecnh th\u1eed nghi\u1ec7m kh\u00f4ng ch\u1ec9 l\u00e0 th\u1ee7 t\u1ee5c ph\u00f2ng th\u00ed nghi\u1ec7m m\u00e0 c\u00f2n l\u00e0 y\u00eau c\u1ea7u ch\u1ea5t l\u01b0\u1ee3ng r\u00f5 r\u00e0ng.<\/p>\n<h2>Hi\u1ec7u chu\u1ea9n nhi\u1ec7t MCCB v\u00e0 c\u00e1c d\u1ea3i tr\u1ec5 LSI(G)<\/h2>\n<p>B\u1ed9 ng\u1eaft m\u1ea1ch v\u1ecf \u0111\u00fac th\u00eam m\u1ed9t l\u1edbp ph\u1ee9c t\u1ea1p. MCCB nhi\u1ec7t-t\u1eeb nh\u1ecf h\u01a1n \u0111\u01b0\u1ee3c hi\u1ec7u chu\u1ea9n t\u01b0\u01a1ng t\u1ef1 nh\u01b0 MCB, b\u1eb1ng c\u00e1ch \u0111i\u1ec1u ch\u1ec9nh m\u1ed9t ph\u1ea7n t\u1eed l\u01b0\u1ee1ng kim cho d\u1ea3i qu\u00e1 t\u1ea3i v\u00e0 ki\u1ec3m tra cu\u1ed9n \u0111i\u1ec7n t\u1eeb cho ch\u1ee9c n\u0103ng ng\u1eaft ng\u1eafn m\u1ea1ch. Nh\u01b0ng nhi\u1ec1u MCCB hi\u1ec7n \u0111\u1ea1i s\u1eed d\u1ee5ng b\u1ed9 ph\u1eadn ng\u1eaft \u0111i\u1ec7n t\u1eed, v\u00e0 \u1edf \u0111\u00e2y <strong>Hi\u1ec7u chu\u1ea9n nhi\u1ec7t MCCB<\/strong> tr\u1edf th\u00e0nh vi\u1ec7c thi\u1ebft l\u1eadp v\u00e0 x\u00e1c minh c\u00e1c tham s\u1ed1 b\u1ea3o v\u1ec7 c\u00f3 th\u1ec3 l\u1eadp tr\u00ecnh thay v\u00ec u\u1ed1n kim lo\u1ea1i. C\u00e1c b\u1ed9 ph\u1eadn ng\u1eaft n\u00e0y th\u01b0\u1eddng \u0111\u01b0\u1ee3c m\u00f4 t\u1ea3 theo s\u01a1 \u0111\u1ed3 LSI ho\u1eb7c LSIG, v\u00e0 m\u1ed7i ch\u1eef c\u00e1i l\u00e0 m\u1ed9t d\u1ea3i b\u1ea3o v\u1ec7 c\u00f3 th\u1ec3 \u0111i\u1ec1u ch\u1ec9nh ri\u00eang bi\u1ec7t:<\/p>\n<ul>\n<li>L, tr\u1ec5 th\u1eddi gian d\u00e0i: ch\u1ee9c n\u0103ng qu\u00e1 t\u1ea3i, t\u01b0\u01a1ng \u0111\u01b0\u01a1ng v\u1edbi ph\u1ea7n t\u1eed nhi\u1ec7t, v\u1edbi d\u00f2ng \u0111i\u1ec7n k\u00edch ho\u1ea1t v\u00e0 th\u1eddi gian tr\u1ec5 c\u00f3 th\u1ec3 \u0111i\u1ec1u ch\u1ec9nh x\u00e1c \u0111\u1ecbnh h\u00e0nh vi qu\u00e1 t\u1ea3i ng\u01b0\u1ee3c th\u1eddi gian.<\/li>\n<li>S, tr\u1ec5 th\u1eddi gian ng\u1eafn: m\u1ed9t \u0111\u1ed9 tr\u1ec5 th\u1ef1c s\u1ef1, c\u00f3 ch\u1ee7 \u00fd tr\u00ean d\u00f2ng l\u1ed7i v\u1eeba ph\u1ea3i, \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 b\u1ed9 ng\u1eaft ph\u00eda d\u01b0\u1edbi c\u00f3 th\u1ec3 ng\u1eaft l\u1ed7i tr\u01b0\u1edbc v\u00e0 b\u1ea3o to\u00e0n t\u00ednh ch\u1ecdn l\u1ecdc. \u0110\u00e2y l\u00e0 d\u1ea3i tr\u1ec5 th\u1eddi gian ng\u1eafn th\u1ef1c s\u1ef1 m\u00e0 MCB \u0111\u01a1n gi\u1ea3n l\u00e0 kh\u00f4ng c\u00f3.<\/li>\n<li>I, t\u1ee9c th\u1eddi: ng\u1eaft ngay l\u1eadp t\u1ee9c tr\u00ean ng\u01b0\u1ee1ng cao m\u00e0 kh\u00f4ng c\u00f3 \u0111\u1ed9 tr\u1ec5 c\u00f3 ch\u1ee7 \u00fd, d\u00e0nh cho c\u00e1c ng\u1eafn m\u1ea1ch nghi\u00eam tr\u1ecdng.<\/li>\n<li>G, l\u1ed7i \u0111\u1ea5t: b\u1ea3o v\u1ec7 l\u1ed7i \u0111\u1ea5t t\u00f9y ch\u1ecdn tr\u00ean c\u00e1c thi\u1ebft b\u1ecb b\u1ed1n c\u1ef1c v\u00e0 c\u00e1c thi\u1ebft b\u1ecb c\u00f3 th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt cao h\u01a1n.<\/li>\n<\/ul>\n<p>\u0110\u1ed1i v\u1edbi MCCB \u0111i\u1ec7n t\u1eed, b\u00e0i ki\u1ec3m tra tr\u1ec5 x\u00e1c minh r\u1eb1ng m\u1ed7i d\u1ea3i ng\u1eaft trong ph\u1ea1m vi dung sai t\u1ea1i c\u00e1c c\u00e0i \u0111\u1eb7t \u0111\u00e3 l\u1eadp tr\u00ecnh, ti\u00eam d\u00f2ng \u0111i\u1ec7n l\u1ea7n l\u01b0\u1ee3t t\u1ea1i c\u00e1c ng\u01b0\u1ee1ng L, S v\u00e0 I v\u00e0 \u0111o th\u1eddi gian ph\u1ea3n h\u1ed3i. \u0110\u1ed1i v\u1edbi MCCB nhi\u1ec7t-t\u1eeb, n\u00f3 x\u00e1c minh tr\u1ef1c ti\u1ebfp ph\u1ea7n t\u1eed l\u01b0\u1ee1ng kim v\u00e0 cu\u1ed9n \u0111i\u1ec7n t\u1eeb, ch\u00ednh x\u00e1c nh\u01b0 \u0111\u1ed1i v\u1edbi MCB nh\u01b0ng v\u1edbi d\u00f2ng \u0111i\u1ec7n cao h\u01a1n v\u00e0 khung l\u1edbn h\u01a1n. D\u00f9 b\u1eb1ng c\u00e1ch n\u00e0o, thi\u1ebft b\u1ecb c\u0169ng ph\u1ea3i cung c\u1ea5p d\u00f2ng th\u1eed nghi\u1ec7m cao h\u01a1n nhi\u1ec1u so v\u1edbi b\u00e0n th\u1eed MCB. Benlong\u2019s <a href=\"https:\/\/benlongkj.com\/vi\/mccb-lab-test-machine-product\/\">MCCB Laboratory Integrated Testing bench<\/a> \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf \u0111\u1ec3 th\u1ef1c hi\u1ec7n ki\u1ec3m tra ng\u1eaft t\u1eeb, hi\u1ec7u chu\u1ea9n nhi\u1ec7t v\u00e0 hi\u1ec7u chu\u1ea9n nhi\u1ec7t k\u00e9o d\u00e0i trong m\u1ed9t tr\u1ea1m, ph\u00f9 h\u1ee3p cho c\u1ea3 ph\u00f2ng th\u00ed nghi\u1ec7m R&amp;D v\u00e0 ph\u00f2ng th\u1eed nghi\u1ec7m ki\u1ec3u m\u1eabu.<\/p>\n<h2>C\u00e1ch th\u1ef1c hi\u1ec7n hi\u1ec7u chu\u1ea9n nhi\u1ec7t tr\u00ean d\u00e2y chuy\u1ec1n s\u1ea3n xu\u1ea5t<\/h2>\n<p>M\u1ed9t <strong>quy tr\u00ecnh hi\u1ec7u chu\u1ea9n ng\u1eaft nhi\u1ec7t<\/strong> \u0111i\u1ec3n h\u00ecnh tr\u00ean d\u00e2y chuy\u1ec1n MCB hi\u1ec7n \u0111\u1ea1i ch\u1ea1y qua m\u1ed9t chu\u1ed7i l\u1eb7p l\u1ea1i. M\u1ed9t d\u00f2ng qu\u00e1 t\u1ea3i \u0111\u01b0\u1ee3c ki\u1ec3m so\u00e1t, th\u01b0\u1eddng l\u00e0 2.55 \u00d7 In, \u0111\u01b0\u1ee3c \u00e1p d\u1ee5ng qua b\u1ed9 ng\u1eaft \u0111ang th\u1eed nghi\u1ec7m s\u1eed d\u1ee5ng ngu\u1ed3n \u1ed5n \u0111\u1ecbnh v\u1edbi m\u00e9o h\u00e0i th\u1ea5p, v\u00ec d\u1ea1ng s\u00f3ng m\u00e9o l\u00e0m thay \u0111\u1ed5i nhi\u1ec7t v\u00e0 l\u00e0m l\u1ec7ch k\u1ebft qu\u1ea3 \u0111o. B\u1ed9 \u0111\u1ebfm th\u1eddi gian \u0111\u1ed9 ph\u00e2n gi\u1ea3i cao ghi l\u1ea1i ch\u00ednh x\u00e1c th\u1eddi \u0111i\u1ec3m b\u1ed9 ng\u1eaft m\u1edf, th\u01b0\u1eddng \u0111\u1ebfn ph\u1ea7n tr\u0103m nh\u1ecf c\u1ee7a k\u1ebft qu\u1ea3 \u0111o. N\u1ebfu th\u1eddi gian ng\u1eaft n\u1eb1m ngo\u00e0i ph\u1ea1m vi cho ph\u00e9p, ph\u1ea7n t\u1eed l\u01b0\u1ee1ng kim s\u1ebd \u0111\u01b0\u1ee3c u\u1ed1n ho\u1eb7c v\u00edt \u0111i\u1ec1u ch\u1ec9nh \u0111\u01b0\u1ee3c ch\u1ec9nh \u2014 b\u1edfi ng\u01b0\u1eddi v\u1eadn h\u00e0nh tr\u00ean b\u00e0n b\u00e1n t\u1ef1 \u0111\u1ed9ng, ho\u1eb7c b\u1edfi \u0111\u1ea7u servo tr\u00ean cell t\u1ef1 \u0111\u1ed9ng ho\u00e0n to\u00e0n. Thi\u1ebft b\u1ecb sau \u0111\u00f3 \u0111\u01b0\u1ee3c th\u1eed l\u1ea1i t\u1eeb tr\u1ea1ng th\u00e1i ngu\u1ed9i, v\u00e0 k\u1ebft qu\u1ea3 \u0111\u1ea1t\/kh\u00f4ng \u0111\u1ea1t c\u00f9ng th\u1eddi gian ng\u1eaft \u0111\u01b0\u1ee3c ghi l\u1ea1i, th\u01b0\u1eddng \u0111\u01b0\u1ee3c xu\u1ea5t qua USB ho\u1eb7c \u0111\u1ea9y l\u00ean MES \u0111\u1ec3 truy xu\u1ea5t \u0111\u1ea7y \u0111\u1ee7. Trong su\u1ed1t qu\u00e1 tr\u00ecnh, v\u00ec ti\u00eau chu\u1ea9n tham chi\u1ebfu 30 \u00b0C, nhi\u1ec7t \u0111\u1ed9 khu v\u1ef1c th\u1eed nghi\u1ec7m \u0111\u01b0\u1ee3c gi\u00e1m s\u00e1t v\u00e0 b\u00f9 tr\u1eeb; <span style=\"color: #991b1b;\">hi\u1ec7u chu\u1ea9n \u1edf nhi\u1ec7t \u0111\u1ed9 m\u00f4i tr\u01b0\u1eddng sai l\u00e0 m\u1ed9t trong nh\u1eefng nguy\u00ean nh\u00e2n ph\u1ed5 bi\u1ebfn nh\u1ea5t g\u00e2y l\u1ed7i th\u1eddi gian ng\u1eaft th\u1ef1c t\u1ebf tr\u00ean hi\u1ec7n tr\u01b0\u1eddng<\/span>.<\/p>\n<p>T\u1ef1 \u0111\u1ed9ng h\u00f3a chu\u1ed7i quy tr\u00ecnh n\u00e0y mang l\u1ea1i ba l\u1ee3i \u00edch: t\u00ednh nh\u1ea5t qu\u00e1n, v\u00ec servo \u0111i\u1ec1u ch\u1ec9nh ch\u00ednh x\u00e1c h\u01a1n so v\u1edbi tay ng\u01b0\u1eddi; t\u1ed1c \u0111\u1ed9, v\u00ec c\u00e1c tr\u1ea1m l\u00e0m vi\u1ec7c song song h\u1ea5p th\u1ee5 c\u00e1c b\u00e0i ki\u1ec3m tra truy\u1ec1n th\u1ed1ng k\u00e9o d\u00e0i; v\u00e0 kh\u1ea3 n\u0103ng truy xu\u1ea5t ngu\u1ed3n g\u1ed1c, v\u00ec d\u1eef li\u1ec7u c\u1ee7a t\u1eebng \u0111\u01a1n v\u1ecb \u0111\u01b0\u1ee3c ghi l\u1ea1i thay v\u00ec ki\u1ec3m tra ng\u1eabu nhi\u00ean. C\u00e1c s\u1ea3n ph\u1ea9m c\u00f3 th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt cao th\u01b0\u1eddng \u0111\u01b0\u1ee3c hi\u1ec7u chu\u1ea9n tr\u00ean 100% \u0111\u01a1n v\u1ecb, trong khi c\u00e1c MCB h\u00e0ng h\u00f3a c\u00f3 th\u1ec3 theo k\u1ebf ho\u1ea1ch l\u1ea5y m\u1eabu \u0111\u00e3 \u0111\u1ecbnh. Ch\u1ea5t l\u01b0\u1ee3ng \u0111\u1ea7u v\u00e0o c\u0169ng r\u1ea5t quan tr\u1ecdng \u2014 c\u1ee5m bimetal ph\u1ea3i \u0111\u01b0\u1ee3c l\u1eafp r\u00e1p nh\u1ea5t qu\u00e1n tr\u01b0\u1edbc khi c\u00f3 th\u1ec3 hi\u1ec7u chu\u1ea9n, \u0111\u00f3 l\u00e0 l\u00fd do t\u1ea1i sao Benlong c\u0169ng cung c\u1ea5p <a href=\"https:\/\/benlongkj.com\/vi\/mcb-thermal-trip-set-automatic-welding-line-product\/\">B\u1ed9 ng\u1eaft m\u1ea1ch nhi\u1ec7t MCB t\u1ef1 \u0111\u1ed9ng cho d\u00e2y chuy\u1ec1n h\u00e0n<\/a> \u0111\u1ec3 s\u1ea3n xu\u1ea5t c\u1ee5m nhi\u1ec7t trip v\u1edbi ch\u1ea5t l\u01b0\u1ee3ng h\u00e0n c\u00f3 th\u1ec3 l\u1eb7p l\u1ea1i. C\u00e1c th\u00e0nh ph\u1ea7n \u0111\u1ed3ng nh\u1ea5t khi v\u00e0o hi\u1ec7u chu\u1ea9n c\u00f3 ngh\u0129a l\u00e0 \u00edt \u0111\u01a1n v\u1ecb b\u1ecb l\u1ec7ch ra ngo\u00e0i ph\u1ea1m vi v\u00e0 gi\u1ea3m thi\u1ec3u vi\u1ec7c l\u00e0m l\u1ea1i \u1edf c\u00e1c c\u00f4ng \u0111o\u1ea1n sau.<\/p>\n<p>Ngu\u1ed3n d\u00f2ng \u0111i\u1ec7n ch\u00ednh l\u00e0 anh h\u00f9ng th\u1ea7m l\u1eb7ng c\u1ee7a to\u00e0n b\u1ed9 giai \u0111o\u1ea1n n\u00e0y. V\u00ec bimetal ph\u1ea3n \u1ee9ng v\u1edbi nhi\u1ec7t, th\u1eddi gian trip ph\u1ee5 thu\u1ed9c v\u00e0o d\u00f2ng RMS th\u1ef1c v\u00e0 ch\u1ea5t l\u01b0\u1ee3ng d\u1ea1ng s\u00f3ng c\u1ee7a n\u00f3, kh\u00f4ng ch\u1ec9 l\u00e0 \u0111i\u1ec3m \u0111\u1eb7t danh ngh\u0129a. M\u1ed9t ngu\u1ed3n \u0111i\u1ec7n b\u1ecb s\u1ee5t \u00e1p d\u01b0\u1edbi t\u1ea3i, tr\u00f4i khi c\u00e1c th\u00e0nh ph\u1ea7n c\u1ee7a n\u00f3 n\u00f3ng l\u00ean, ho\u1eb7c mang nhi\u1ec1u m\u00e9o h\u00e0i s\u1ebd l\u00e0m n\u00f3ng d\u1ea3i kim lo\u1ea1i kh\u00e1c v\u1edbi s\u00f3ng sin s\u1ea1ch m\u00e0 ti\u00eau chu\u1ea9n gi\u1ea3 \u0111\u1ecbnh, v\u00e0 m\u1ed7i \u0111\u01a1n v\u1ecb hi\u1ec7u chu\u1ea9n theo \u0111\u00f3 s\u1ebd k\u1ebf th\u1eeba sai s\u1ed1 \u0111\u00f3. \u0110\u00f3 l\u00e0 l\u00fd do t\u1ea1i sao m\u1ed9t ngu\u1ed3n d\u00f2ng \u0111i\u1ec7n \u1ed5n \u0111\u1ecbnh, v\u00f2ng k\u00edn v\u1edbi t\u1ed5ng m\u00e9o h\u00e0i th\u1ea5p, k\u1ebft h\u1ee3p v\u1edbi c\u00e1c ti\u1ebfp \u0111i\u1ec3m th\u1eed nghi\u1ec7m ch\u1eafc ch\u1eafn, \u0111i\u1ec7n tr\u1edf th\u1ea5p, mang l\u1ea1i hi\u1ec7u su\u1ea5t cao h\u01a1n h\u1ea7u h\u1ebft c\u00e1c y\u1ebfu t\u1ed1 \u0111\u01a1n l\u1ebb kh\u00e1c tr\u00ean b\u00e0n th\u1eed.<\/p>\n<h2>T\u1ea1i sao B\u1ed9 Ng\u1eaft M\u1ea1ch Th\u1ea5t B\u1ea1i Ki\u1ec3m Tra \u0110\u1ed9 Tr\u1ec5 QA<\/h2>\n<p>Ngay c\u1ea3 khi \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf t\u1ed1t, b\u1ed9 ng\u1eaft m\u1ea1ch v\u1eabn c\u00f3 th\u1ec3 b\u1ecb lo\u1ea1i n\u1ebfu quy tr\u00ecnh s\u1ea3n xu\u1ea5t b\u1ecb l\u1ec7ch. Nh\u1eefng l\u00fd do ph\u1ed5 bi\u1ebfn nh\u1ea5t khi\u1ebfn b\u1ed9 ng\u1eaft kh\u00f4ng v\u01b0\u1ee3t qua ki\u1ec3m tra \u0111\u1ed9 tr\u1ec5 bao g\u1ed3m nhi\u1ec7t \u0111\u1ed9 m\u00f4i tr\u01b0\u1eddng cao l\u1ec7ch so v\u1edbi nhi\u1ec7t \u0111\u1ed9 tham chi\u1ebfu 30 \u00b0C, l\u00e0m d\u1ecbch chuy\u1ec3n d\u1ea3i nhi\u1ec7t t\u1ed5ng th\u1ec3 sang tr\u00e1i ho\u1eb7c ph\u1ea3i; d\u00f2ng \u0111i\u1ec7n kh\u00f4ng \u1ed5n \u0111\u1ecbnh, l\u00e0m thay \u0111\u1ed5i l\u01b0\u1ee3ng nhi\u1ec7t cung c\u1ea5p cho bimetal; \u0111i\u1ec7n tr\u1edf kh\u00f4ng \u0111\u00fang t\u1ea1i c\u00e1c \u0111\u1ea7u c\u1ef1c, t\u1ea1o ra nhi\u1ec7t b\u1ed5 sung; th\u1eddi gian \u1ed5n \u0111\u1ecbnh gi\u1eefa c\u00e1c l\u1ea7n th\u1eed kh\u00f4ng \u0111\u1ee7, khi\u1ebfn bimetal gi\u1eef l\u1ea1i nhi\u1ec7t d\u01b0; th\u1ebb \u0111\u01b0\u1eddng cong ho\u1eb7c ch\u01b0\u01a1ng tr\u00ecnh \u00e1p d\u1ee5ng sai; v\u00e0 s\u1ef1 tr\u00f4i c\u01a1 h\u1ecdc sau hi\u1ec7u chu\u1ea9n, g\u00e2y ra s\u1ef1 ph\u00e2n t\u00e1n cao gi\u1eefa c\u00e1c l\u1ea7n th\u1eed li\u00ean ti\u1ebfp. H\u1ea7u h\u1ebft c\u00e1c v\u1ea5n \u0111\u1ec1 n\u00e0y ph\u00e1t sinh do ki\u1ec3m so\u00e1t k\u00e9m v\u00e0 c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c lo\u1ea1i b\u1ecf n\u1ebfu b\u00e0n s\u1ea3n xu\u1ea5t c\u00f3 ngu\u1ed3n d\u00f2ng \u1ed5n \u0111\u1ecbnh, b\u00f9 nhi\u1ec7t tuy\u1ec7t v\u1eddi v\u00e0 h\u1ec7 th\u1ed1ng ghi d\u1eef li\u1ec7u t\u1ef1 \u0111\u1ed9ng.<\/p>\n<p>Ki\u1ec3m tra \u0111\u1ed9 tr\u1ec5 ch\u1ec9 l\u00e0 m\u1ed9t tr\u1ee5 c\u1ed9t trong ki\u1ec3m so\u00e1t ch\u1ea5t l\u01b0\u1ee3ng b\u1ed9 ng\u1eaft m\u1ea1ch. N\u00f3 \u0111\u1ee9ng c\u1ea1nh vi\u1ec7c ki\u1ec3m tra \u0111i\u1ec7n m\u00f4i v\u00e0 c\u00e1ch \u0111i\u1ec7n \u2014 n\u1ebfu b\u1ea1n \u0111ang x\u00e2y d\u1ef1ng m\u1ed9t k\u1ebf ho\u1ea1ch ki\u1ec3m tra \u0111\u1ea7y \u0111\u1ee7, b\u00e0i gi\u1ea3i th\u00edch c\u1ee7a ch\u00fang t\u00f4i v\u1ec1 <a href=\"https:\/\/benlongkj.com\/vi\/blog\/what-is-hi-pot-testing\/\">ki\u1ec3m tra hi-pot<\/a> bao g\u1ed3m ph\u1ea7n ki\u1ec3m tra \u0111i\u1ec7n \u00e1p ch\u1ecbu \u0111\u1ef1ng ch\u1ea1y song song v\u1edbi c\u00e1c ki\u1ec3m tra nhi\u1ec7t v\u00e0 t\u1eeb t\u00ednh.<\/p>\n<h2>L\u1ef1a ch\u1ecdn Thi\u1ebft B\u1ecb Hi\u1ec7u Chu\u1ea9n Nhi\u1ec7t v\u00e0 Ki\u1ec3m Tra \u0110\u1ed9 Tr\u1ec5<\/h2>\n<p>Vi\u1ec7c l\u1ef1a ch\u1ecdn b\u00e0n hi\u1ec7u chu\u1ea9n ph\u00f9 h\u1ee3p v\u1edbi s\u1ea3n ph\u1ea9m r\u1ea5t quan tr\u1ecdng. M\u1ed9t d\u00f2ng MCB \u0111\u01a1n l\u1ebb v\u1edbi s\u1ea3n l\u01b0\u1ee3ng v\u1eeba ph\u1ea3i s\u1ebd \u0111\u01b0\u1ee3c ph\u1ee5c v\u1ee5 t\u1ed1t b\u1edfi m\u1ed9t b\u00e0n hi\u1ec7u chu\u1ea9n b\u00e1n t\u1ef1 \u0111\u1ed9ng; m\u1ed9t nh\u00e0 m\u00e1y v\u1eadn h\u00e0nh nhi\u1ec1u m\u1eabu m\u00e3 s\u1ebd \u0111\u01b0\u1ee3c l\u1ee3i t\u1eeb vi\u1ec7c chuy\u1ec3n \u0111\u1ed5i d\u1ef1a tr\u00ean th\u1ebb \u0111\u1ec3 d\u00e2y chuy\u1ec1n c\u00f3 th\u1ec3 chuy\u1ec3n \u0111\u1ed5i c\u00e1c d\u00f2ng s\u1ea3n ph\u1ea9m trong v\u00e0i ph\u00fat; v\u00e0 m\u1ed9t x\u01b0\u1edfng MCCB ho\u1eb7c ACB c\u1ea7n c\u00e1c b\u00e0n hi\u1ec7u chu\u1ea9n d\u00f2ng cao h\u01a1n, khung l\u1edbn h\u01a1n v\u1edbi ph\u1ea1m vi \u0111\u1ec3 \u0111\u1ea1t \u0111\u01b0\u1ee3c c\u00e1c b\u1ed9i s\u1ed1 y\u00eau c\u1ea7u. To\u00e0n b\u1ed9 d\u00f2ng s\u1ea3n ph\u1ea9m c\u1ee7a Benlong n\u1eb1m trong <a href=\"https:\/\/benlongkj.com\/vi\/test-bench-project\/\">D\u1ef1 \u00e1n b\u00e0n th\u1eed nghi\u1ec7m<\/a> danh m\u1ee5c, bao g\u1ed3m b\u00e0n hi\u1ec7u chu\u1ea9n nhi\u1ec7t MCB, b\u00e0n th\u1eed ng\u1eaft t\u1eeb MCCB, thi\u1ebft b\u1ecb th\u1eed nghi\u1ec7m ph\u00f2ng th\u00ed nghi\u1ec7m t\u00edch h\u1ee3p v\u00e0 c\u00e1c tr\u1ea1m th\u1eed nghi\u1ec7m ACB to\u00e0n di\u1ec7n. V\u00ec m\u1ed7i nh\u00e0 m\u00e1y c\u00f3 s\u1ef1 pha tr\u1ed9n m\u1eabu m\u00e3, s\u1ea3n l\u01b0\u1ee3ng m\u1ee5c ti\u00eau v\u00e0 th\u1eddi gian chu tr\u00ecnh kh\u00e1c nhau, c\u00e1c b\u00e0n hi\u1ec7u chu\u1ea9n n\u00e0y th\u01b0\u1eddng \u0111\u01b0\u1ee3c c\u1ea5u h\u00ecnh theo s\u1ea3n ph\u1ea9m c\u1ee7a kh\u00e1ch h\u00e0ng thay v\u00ec b\u00e1n d\u01b0\u1edbi d\u1ea1ng c\u00e1c \u0111\u01a1n v\u1ecb c\u1ed1 \u0111\u1ecbnh trong danh m\u1ee5c.<\/p>\n<h2>Ph\u1ea7n k\u1ebft lu\u1eadn<\/h2>\n<p>Hi\u1ec7u chu\u1ea9n nhi\u1ec7t l\u00e0 n\u01a1i m\u1ed9t b\u1ed9 ng\u1eaft m\u1ea1ch \u0111\u1ea1t \u0111\u01b0\u1ee3c \u0111\u1ecbnh m\u1ee9c c\u1ee7a n\u00f3. Th\u1eed nghi\u1ec7m tr\u1ec5 x\u00e1c minh \u0111i\u1ec1u n\u00e0y \u0111\u01b0\u1ee3c chia r\u00f5 th\u00e0nh ph\u1ea7n tr\u1ec5 d\u00e0i, thi\u1ebft l\u1eadp v\u00e0 ki\u1ec3m tra bimetal nhi\u1ec7t theo c\u00e1c \u0111i\u1ec3m qu\u00e1 t\u1ea3i IEC 60898-1, v\u00e0 ph\u1ea7n tr\u1ec5 ng\u1eafn ho\u1eb7c t\u1ee9c th\u1eddi, ki\u1ec3m tra ng\u1eaft t\u1eeb \u2014 v\u00e0 ch\u00ednh ph\u00eda ng\u1eaft t\u1eeb n\u00e0y t\u1ea1o ra c\u00e1c ti\u00eau ch\u00ed v\u01b0\u1ee3t qua kh\u00e1c nhau cho c\u00e1c \u0111\u01b0\u1eddng cong B, C v\u00e0 D. \u0110\u1ea3m b\u1ea3o m\u00f4i tr\u01b0\u1eddng, d\u1ea1ng s\u00f3ng d\u00f2ng \u0111i\u1ec7n v\u00e0 th\u1eddi gian ch\u00ednh x\u00e1c, hi\u1ec7u chu\u1ea9n t\u1eebng bimetal ri\u00eang l\u1ebb, ghi l\u1ea1i k\u1ebft qu\u1ea3, v\u00e0 k\u1ebft qu\u1ea3 l\u00e0 m\u1ed9t b\u1ed9 ng\u1eaft m\u1ea1ch ng\u1eaft ch\u00ednh x\u00e1c khi c\u1ea7n v\u00e0 gi\u1eef \u0111\u01b0\u1ee3c khi c\u1ea7n. \u0110\u1ed1i v\u1edbi c\u00e1c nh\u00e0 s\u1ea3n xu\u1ea5t m\u1edf r\u1ed9ng quy tr\u00ecnh n\u00e0y, s\u1ef1 k\u1ebft h\u1ee3p \u0111\u00fang \u0111\u1eafn gi\u1eefa b\u00e0n hi\u1ec7u chu\u1ea9n v\u00e0 b\u00e0n th\u1eed nghi\u1ec7m tr\u1ec5 bi\u1ebfn m\u1ed9t c\u00f4ng vi\u1ec7c ch\u1eadm, ph\u1ee5 thu\u1ed9c v\u00e0o ng\u01b0\u1eddi v\u1eadn h\u00e0nh th\u00e0nh m\u1ed9t giai \u0111o\u1ea1n s\u1ea3n xu\u1ea5t c\u00f3 th\u1ec3 l\u1eb7p l\u1ea1i v\u00e0 truy xu\u1ea5t \u0111\u01b0\u1ee3c.<\/p>","protected":false},"excerpt":{"rendered":"<p>In a circuit-breaker factory, the moment that decides whether a finished MCB is safe or scrap is thermal calibration. It is the step where the bimetallic element inside each breaker is trimmed and verified so that the device trips within the exact time window demanded by the standard \u2014 not a second too early, not [&hellip;]<\/p>\n","protected":false},"author":3,"featured_media":1648,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[1],"tags":[],"class_list":["post-1647","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog"],"blocksy_meta":[],"acf":[],"_links":{"self":[{"href":"https:\/\/benlongkj.com\/vi\/wp-json\/wp\/v2\/posts\/1647","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/benlongkj.com\/vi\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/benlongkj.com\/vi\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/benlongkj.com\/vi\/wp-json\/wp\/v2\/users\/3"}],"replies":[{"embeddable":true,"href":"https:\/\/benlongkj.com\/vi\/wp-json\/wp\/v2\/comments?post=1647"}],"version-history":[{"count":1,"href":"https:\/\/benlongkj.com\/vi\/wp-json\/wp\/v2\/posts\/1647\/revisions"}],"predecessor-version":[{"id":1651,"href":"https:\/\/benlongkj.com\/vi\/wp-json\/wp\/v2\/posts\/1647\/revisions\/1651"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/benlongkj.com\/vi\/wp-json\/wp\/v2\/media\/1648"}],"wp:attachment":[{"href":"https:\/\/benlongkj.com\/vi\/wp-json\/wp\/v2\/media?parent=1647"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/benlongkj.com\/vi\/wp-json\/wp\/v2\/categories?post=1647"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/benlongkj.com\/vi\/wp-json\/wp\/v2\/tags?post=1647"}],"curies":[{"name":"trang web","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}