{"id":19965,"date":"2025-11-19T01:34:00","date_gmt":"2025-11-18T17:34:00","guid":{"rendered":"https:\/\/viox.com\/?p=19965"},"modified":"2025-11-14T13:35:32","modified_gmt":"2025-11-14T05:35:32","slug":"how-to-really-test-mccb-test-button-lie","status":"publish","type":"post","link":"https:\/\/test.viox.com\/vi\/how-to-really-test-mccb-test-button-lie\/","title":{"rendered":"L\u00e0m th\u1ebf n\u00e0o \u0111\u1ec3 th\u1ef1c S\u1ef1 ** ki\u1ec3m Tra m\u1ed9t MCCB (V\u00e0 t\u1ea1i Sao \"ki\u1ec3m Tra\" N\u00fat l\u00e0 m\u1ed9t l\u1eddi n\u00f3i D\u1ed1i)"},"content":{"rendered":"<div class=\"product-intro\">\n<p><img fetchpriority=\"high\" decoding=\"async\" class=\"alignnone size-full wp-image-19966\" src=\"https:\/\/test.viox.com\/wp-content\/uploads\/2025\/11\/The-Placebo-Button.webp\" alt=\"The 'Placebo' Button\" width=\"800\" height=\"800\" srcset=\"https:\/\/test.viox.com\/wp-content\/uploads\/2025\/11\/The-Placebo-Button.webp 800w, https:\/\/test.viox.com\/wp-content\/uploads\/2025\/11\/The-Placebo-Button-300x300.webp 300w, https:\/\/test.viox.com\/wp-content\/uploads\/2025\/11\/The-Placebo-Button-150x150.webp 150w, https:\/\/test.viox.com\/wp-content\/uploads\/2025\/11\/The-Placebo-Button-768x768.webp 768w, https:\/\/test.viox.com\/wp-content\/uploads\/2025\/11\/The-Placebo-Button-12x12.webp 12w, https:\/\/test.viox.com\/wp-content\/uploads\/2025\/11\/The-Placebo-Button-600x600.webp 600w, https:\/\/test.viox.com\/wp-content\/uploads\/2025\/11\/The-Placebo-Button-100x100.webp 100w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/><\/p>\n<p>B\u1ea1n \u0111ang \u1edf hi\u1ec7n tr\u01b0\u1eddng, tr\u01b0\u1edbc m\u1ed9t MCCB (Moulded Case Circuit Breaker - \u00c1pt\u00f4m\u00e1t v\u1ecf \u0111\u00fac) 400A kh\u1ed5ng l\u1ed3, \u0111\u00f3ng vai tr\u00f2 l\u00e0 \u201cc\u1ed5ng ch\u00ednh\u201d cho m\u1ed9t d\u00e2y chuy\u1ec1n s\u1ea3n xu\u1ea5t quan tr\u1ecdng c\u1ee7a nh\u00e0 m\u00e1y.<\/p>\n<p>B\u1ea1n c\u1ea7n \u201cki\u1ec3m tra\u201d n\u00f3. B\u1ea1n th\u1ea5y n\u00fat \u201cPush-to-Trip\u201d (PTT) nh\u1ecf. B\u1ea1n nh\u1ea5n n\u00f3.<\/p>\n<p><em>K\u00caNH.<\/em><\/p>\n<p>\u00c1pt\u00f4m\u00e1t ng\u1eaft.<\/p>\n<p>C\u00f4ng vi\u1ec7c c\u1ee7a b\u1ea1n \u0111\u00e3 ho\u00e0n th\u00e0nh, ph\u1ea3i kh\u00f4ng? B\u1ea1n \u0111\u00e3 \u201cki\u1ec3m tra\u201d \u00e1pt\u00f4m\u00e1t?<\/p>\n<p>Kh\u00f4ng. B\u1ea1n \u0111\u00e3 l\u00e0m <em>kh\u00f4ng c\u00f3 g\u00ec<\/em> nh\u01b0ng ki\u1ec3m tra m\u1ed9t c\u00e1i l\u00f2 xo. B\u1ea1n v\u1eeba m\u1eafc ph\u1ea3i <strong>\u201cN\u00fat \u2018Gi\u1ea3 d\u01b0\u1ee3c\u2019.\u201d<\/strong> \u0110\u00e2y l\u00e0 s\u1ef1 th\u1eadt v\u1ec1 \u201cki\u1ec3m tra\u201d \u0111\u00f3 v\u00e0 c\u00e1ch b\u1ea1n <em>th\u1ef1c s\u1ef1<\/em> bi\u1ebft li\u1ec7u \u00e1pt\u00f4m\u00e1t c\u1ee7a b\u1ea1n l\u00e0 \u201cng\u01b0\u1eddi b\u1ea3o v\u1ec7\u201d hay ch\u1ec9 l\u00e0 m\u1ed9t \u201cqu\u1ea3 bom.\u201d<\/p>\n<hr \/>\n<h2>Ph\u00e9p lo\u1ea1i suy \u201cB\u00e1o kh\u00f3i\u201d: N\u00fat \u0111\u00f3 <em>Th\u1ef1c s\u1ef1<\/em> L\u00e0m g\u00ec<\/h2>\n<p><img decoding=\"async\" class=\"alignnone size-full wp-image-19968\" src=\"https:\/\/test.viox.com\/wp-content\/uploads\/2025\/11\/The-22Smoke-Alarm22-Analogy-What-That-Button-Actually-Does.webp\" alt=\"The &quot;Smoke Alarm&quot; Analogy: What That Button Actually Does\" width=\"800\" height=\"800\" srcset=\"https:\/\/test.viox.com\/wp-content\/uploads\/2025\/11\/The-22Smoke-Alarm22-Analogy-What-That-Button-Actually-Does.webp 800w, https:\/\/test.viox.com\/wp-content\/uploads\/2025\/11\/The-22Smoke-Alarm22-Analogy-What-That-Button-Actually-Does-300x300.webp 300w, https:\/\/test.viox.com\/wp-content\/uploads\/2025\/11\/The-22Smoke-Alarm22-Analogy-What-That-Button-Actually-Does-150x150.webp 150w, https:\/\/test.viox.com\/wp-content\/uploads\/2025\/11\/The-22Smoke-Alarm22-Analogy-What-That-Button-Actually-Does-768x768.webp 768w, https:\/\/test.viox.com\/wp-content\/uploads\/2025\/11\/The-22Smoke-Alarm22-Analogy-What-That-Button-Actually-Does-12x12.webp 12w, https:\/\/test.viox.com\/wp-content\/uploads\/2025\/11\/The-22Smoke-Alarm22-Analogy-What-That-Button-Actually-Does-600x600.webp 600w, https:\/\/test.viox.com\/wp-content\/uploads\/2025\/11\/The-22Smoke-Alarm22-Analogy-What-That-Button-Actually-Does-100x100.webp 100w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/><\/p>\n<p>Kho\u1ea3nh kh\u1eafc \u201cAha!\u201d l\u1edbn nh\u1ea5t trong an to\u00e0n \u0111i\u1ec7n l\u00e0: Nh\u1ea5n n\u00fat \u201cTest\u201d \u0111\u00f3 l\u00e0 <em>ch\u00ednh x\u00e1c<\/em> gi\u1ed1ng nh\u01b0 nh\u1ea5n n\u00fat \u201cTest\u201d tr\u00ean b\u00e1o kh\u00f3i \u1edf nh\u00e0 b\u1ea1n.<\/p>\n<p>H\u00e3y suy ngh\u0129 v\u1ec1 n\u00f3.<\/p>\n<ul>\n<li><strong>\u0110i\u1ec1u n\u00f3 ch\u1ee9ng minh:<\/strong> C\u00f2i <em>k\u00eau b\u00edp<\/em>. Pin c\u00f3 \u0111i\u1ec7n. B\u00ean trong <em>c\u00f2i<\/em> ho\u1ea1t \u0111\u1ed9ng.<\/li>\n<li><strong>\u0110i\u1ec1u n\u00f3 KH\u00d4NG ch\u1ee9ng minh:<\/strong> R\u1eb1ng <strong>\u201cc\u1ea3m bi\u1ebfn kh\u00f3i\u201d<\/strong> (b\u1ed9 <em>b\u1ea5t<\/em> n\u00e3o) th\u1ef1c s\u1ef1 c\u00f3 th\u1ec3 <em>ph\u00e1t hi\u1ec7n kh\u00f3i<\/em>.<\/li>\n<\/ul>\n<p>N\u00fat \u201cTest\u201d c\u1ee7a MCCB c\u0169ng v\u1eady. \u0110\u00f3 l\u00e0 m\u1ed9t <strong>c\u01a1 kh\u00ed<\/strong> ki\u1ec3m tra, kh\u00f4ng ph\u1ea3i l\u00e0 m\u1ed9t <strong>\u0111i\u1ec7n<\/strong> c\u00e1i c\u1ea7n t\u00ecm.<\/p>\n<p>N\u00fat PTT ch\u1ec9 l\u00e0 m\u1ed9t thanh nh\u1ef1a nh\u1ecf <em>b\u1ecf qua<\/em> \u201cb\u1ed9 n\u00e3o\u201d th\u1ef1c s\u1ef1 v\u00e0 c\u01a1 h\u1ecdc \u201cch\u1ecdc\u201d v\u00e0o ch\u1ed1t ng\u1eaft cu\u1ed1i c\u00f9ng. B\u1ea1n \u0111\u00e3 x\u00e1c nh\u1eadn \u201ckim h\u1ecfa\u201d ho\u1ea1t \u0111\u1ed9ng, ch\u1ee9 kh\u00f4ng ph\u1ea3i \u201cc\u00f2 s\u00fang\u201d th\u1ef1c s\u1ef1 c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c k\u00e9o b\u1edfi c\u00e1c c\u1ea3m bi\u1ebfn.<\/p>\n<hr \/>\n<h2>\u201cHai b\u1ed9 n\u00e3o\u201d m\u00e0 n\u00fat \u201cGi\u1ea3 d\u01b0\u1ee3c\u201d b\u1ecf qua<\/h2>\n<p><img decoding=\"async\" class=\"alignnone size-full wp-image-19970\" src=\"https:\/\/test.viox.com\/wp-content\/uploads\/2025\/11\/The-22Two-Brains22-That-22Placebo22-Button-Ignores.webp\" alt=\"The &quot;Two Brains&quot; That &quot;Placebo&quot; Button Ignores\" width=\"800\" height=\"800\" srcset=\"https:\/\/test.viox.com\/wp-content\/uploads\/2025\/11\/The-22Two-Brains22-That-22Placebo22-Button-Ignores.webp 800w, https:\/\/test.viox.com\/wp-content\/uploads\/2025\/11\/The-22Two-Brains22-That-22Placebo22-Button-Ignores-300x300.webp 300w, https:\/\/test.viox.com\/wp-content\/uploads\/2025\/11\/The-22Two-Brains22-That-22Placebo22-Button-Ignores-150x150.webp 150w, https:\/\/test.viox.com\/wp-content\/uploads\/2025\/11\/The-22Two-Brains22-That-22Placebo22-Button-Ignores-768x768.webp 768w, https:\/\/test.viox.com\/wp-content\/uploads\/2025\/11\/The-22Two-Brains22-That-22Placebo22-Button-Ignores-12x12.webp 12w, https:\/\/test.viox.com\/wp-content\/uploads\/2025\/11\/The-22Two-Brains22-That-22Placebo22-Button-Ignores-600x600.webp 600w, https:\/\/test.viox.com\/wp-content\/uploads\/2025\/11\/The-22Two-Brains22-That-22Placebo22-Button-Ignores-100x100.webp 100w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/><\/p>\n<p>M\u1ed9t \u00e1pt\u00f4m\u00e1t c\u00f3 hai <em>b\u1ea5t<\/em> \u201cb\u1ed9 n\u00e3o\u201d (b\u1ed9 ph\u1eadn ng\u1eaft) \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf \u0111\u1ec3 b\u1ea3o v\u1ec7 thi\u1ebft b\u1ecb v\u00e0 t\u00ednh m\u1ea1ng c\u1ee7a b\u1ea1n. N\u00fat \u201cgi\u1ea3 d\u01b0\u1ee3c\u201d \u0111\u00f3 ki\u1ec3m tra <strong>kh\u00f4ng c\u00e1i n\u00e0o trong s\u1ed1 ch\u00fang<\/strong>.<\/p>\n<h3>N\u00e3o 1: \u201cN\u1ed3i n\u1ea5u ch\u1eadm\u201d (Ng\u1eaft nhi\u1ec7t)<\/h3>\n<ul>\n<li><strong>C\u00f4ng vi\u1ec7c c\u1ee7a n\u00f3:<\/strong> \u0110\u1ec3 ph\u00e1t hi\u1ec7n <strong>Qu\u00e1 t\u1ea3i<\/strong> (v\u00ed d\u1ee5: \u00e1pt\u00f4m\u00e1t 100A ch\u1ea1y \u1edf 120A trong 10 ph\u00fat).<\/li>\n<li><strong>C\u00e1ch th\u1ee9c ho\u1ea1t \u0111\u1ed9ng:<\/strong> M\u1ed9t d\u1ea3i l\u01b0\u1ee1ng kim (hai kim lo\u1ea1i) <em>t\u1eeb t\u1eeb<\/em> n\u00f3ng l\u00ean v\u1edbi d\u00f2ng \u0111i\u1ec7n d\u01b0 th\u1eeba. Khi n\u00f3 n\u00f3ng l\u00ean, n\u00f3 u\u1ed1n cong, v\u00e0 cu\u1ed1i c\u00f9ng\u2014gi\u1ed1ng nh\u01b0 b\u1ed9 h\u1eb9n gi\u1edd \u201cn\u1ed3i n\u1ea5u ch\u1eadm\u201d\u2014n\u00f3 <em>u\u1ed1n cong<\/em> \u0111\u1ee7 xa \u0111\u1ec3 \u201cch\u1ecdc\u201d v\u00e0o ch\u1ed1t ng\u1eaft.<\/li>\n<li><strong>T\u1ea1i sao n\u00f3 quan tr\u1ecdng:<\/strong> \u0110i\u1ec1u n\u00e0y gi\u00fap b\u1ea3o v\u1ec7 c\u00e1p c\u1ee7a b\u1ea1n kh\u1ecfi b\u1ecb qu\u00e1 n\u00f3ng trong t\u01b0\u1eddng, n\u00f3ng ch\u1ea3y v\u00e0 g\u00e2y ra h\u1ecfa ho\u1ea1n.<\/li>\n<\/ul>\n<h3>N\u00e3o 2: \u201cB\u1eaby chu\u1ed9t\u201d (Ng\u1eaft t\u1eeb)<\/h3>\n<ul>\n<li><strong>C\u00f4ng vi\u1ec7c c\u1ee7a n\u00f3:<\/strong> \u0110\u1ec3 ph\u00e1t hi\u1ec7n <strong>ng\u1eafn m\u1ea1ch<\/strong> (v\u00ed d\u1ee5: s\u1ef1 c\u1ed1 1000A t\u1eeb \u0111o\u1ea3n m\u1ea1ch).<\/li>\n<li><strong>C\u00e1ch th\u1ee9c ho\u1ea1t \u0111\u1ed9ng:<\/strong> M\u1ed9t nam ch\u00e2m \u0111i\u1ec7n <em>ngay l\u1eadp t\u1ee9c<\/em> (trong mili gi\u00e2y) t\u1ea1o ra m\u1ed9t t\u1eeb tr\u01b0\u1eddng m\u1ea1nh m\u1ebd t\u1eeb s\u1ef1 t\u0103ng v\u1ecdt l\u1edbn c\u1ee7a d\u00f2ng \u0111i\u1ec7n. Tr\u01b0\u1eddng n\u00e0y <em>b\u00fang<\/em> m\u1ed9t \u0111\u00f2n b\u1ea9y\u2014gi\u1ed1ng nh\u01b0 m\u1ed9t \u201cb\u1eaby chu\u1ed9t\u201d\u2014\u0111\u1ec3 \u201cch\u1ecdc\u201d v\u00e0o ch\u1ed1t ng\u1eaft.<\/li>\n<li><strong>T\u1ea1i sao n\u00f3 quan tr\u1ecdng:<\/strong> \u0110i\u1ec1u n\u00e0y gi\u00fap b\u1ea1n tr\u00e1nh kh\u1ecfi m\u1ed9t <a href=\"https:\/\/test.viox.com\/vi\/what-is-an-arc-in-a-circuit-breaker\/\">h\u1ed3 quang \u0111i\u1ec7n<\/a> n\u1ed5, c\u00e1c s\u1ef1 c\u1ed1 ph\u00e1 h\u1ee7y thi\u1ebft b\u1ecb v\u00e0 m\u1ed9t ng\u00e0y r\u1ea5t t\u1ed3i t\u1ec7.<\/li>\n<\/ul>\n<p>N\u00fat PTT ho\u00e0n to\u00e0n b\u1ecf qua c\u1ea3 hai \u201cb\u1ed9 n\u00e3o\u201d c\u1ee9u m\u1ea1ng n\u00e0y.\u201d<\/p>\n<hr \/>\n<h2>\u201cL\u1ed7i 800A\u201d: Khi m\u1ed9t \u201c\u00c1pt\u00f4m\u00e1t\u201d tr\u1edf th\u00e0nh m\u1ed9t \u201cC\u00f4ng t\u1eafc\u201d<\/h2>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-19971\" src=\"https:\/\/test.viox.com\/wp-content\/uploads\/2025\/11\/The-22800A-Failure22-When-a-22Breaker22-Becomes-a-22Switch22.webp\" alt=\"The &quot;800A Failure&quot;: When a &quot;Breaker&quot; Becomes a &quot;Switch&quot;\" width=\"800\" height=\"800\" srcset=\"https:\/\/test.viox.com\/wp-content\/uploads\/2025\/11\/The-22800A-Failure22-When-a-22Breaker22-Becomes-a-22Switch22.webp 800w, https:\/\/test.viox.com\/wp-content\/uploads\/2025\/11\/The-22800A-Failure22-When-a-22Breaker22-Becomes-a-22Switch22-300x300.webp 300w, https:\/\/test.viox.com\/wp-content\/uploads\/2025\/11\/The-22800A-Failure22-When-a-22Breaker22-Becomes-a-22Switch22-150x150.webp 150w, https:\/\/test.viox.com\/wp-content\/uploads\/2025\/11\/The-22800A-Failure22-When-a-22Breaker22-Becomes-a-22Switch22-768x768.webp 768w, https:\/\/test.viox.com\/wp-content\/uploads\/2025\/11\/The-22800A-Failure22-When-a-22Breaker22-Becomes-a-22Switch22-12x12.webp 12w, https:\/\/test.viox.com\/wp-content\/uploads\/2025\/11\/The-22800A-Failure22-When-a-22Breaker22-Becomes-a-22Switch22-600x600.webp 600w, https:\/\/test.viox.com\/wp-content\/uploads\/2025\/11\/The-22800A-Failure22-When-a-22Breaker22-Becomes-a-22Switch22-100x100.webp 100w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/><\/p>\n<p>\u201cV\u1eady th\u00ec sao?\u201d b\u1ea1n n\u00f3i. \u201cN\u1ebfu l\u00f2 xo ho\u1ea1t \u0111\u1ed9ng, th\u00ec b\u1ed9 n\u00e3o c\u00f3 l\u1ebd v\u1eabn \u1ed5n.\u201d<\/p>\n<p>\u0110\u00e2y ch\u00ednh x\u00e1c l\u00e0 suy ngh\u0129 d\u1eabn \u0111\u1ebfn th\u1ea3m h\u1ecda. \u0110\u00e2y l\u00e0 <strong>\u201cL\u1ed7i 800A.\u201d<\/strong><\/p>\n<p>M\u1ed9t \u201cc\u00e2u chuy\u1ec7n chi\u1ebfn tranh\u201d t\u1eeb m\u1ed9t k\u1ef9 s\u01b0 h\u1ec7 th\u1ed1ng \u0111i\u1ec7n cao c\u1ea5p:<\/p>\n<p>\u201cCh\u00fang t\u00f4i \u0111\u01b0\u1ee3c thu\u00ea \u0111\u1ec3 th\u1ef1c hi\u1ec7n PM (B\u1ea3o tr\u00ec ph\u00f2ng ng\u1eeba) h\u00e0ng n\u0103m t\u1ea1i m\u1ed9t nh\u00e0 m\u00e1y. H\u1ecd c\u00f3 m\u1ed9t MCCB 400A tr\u00ean m\u1ed9t feeder ch\u00ednh. N\u00f3 \u0111\u00e3 20 n\u0103m tu\u1ed5i.<br \/>\n\u0110i\u1ec1u \u0111\u1ea7u ti\u00ean ch\u00fang t\u00f4i l\u00e0m? Ch\u00fang t\u00f4i nh\u1ea5n n\u00fat PTT. <em>K\u00caNH.<\/em> N\u00f3 ng\u1eaft m\u1ea1ch ho\u00e0n h\u1ea3o. Qu\u1ea3n l\u00fd nh\u00e0 m\u00e1y m\u1ec9m c\u01b0\u1eddi.<\/p>\n<p>Sau \u0111\u00f3, ch\u00fang t\u00f4i k\u00e9o v\u00e0o <strong>\u201cQu\u00e1i th\u00fa.\u201d<\/strong><\/p>\n<p>Ch\u00fang t\u00f4i k\u1ebft n\u1ed1i b\u1ed9 ki\u1ec3m tra \u2018Ti\u00eam d\u00f2ng \u0111i\u1ec7n s\u01a1 c\u1ea5p\u2019 c\u1ee7a m\u00ecnh. M\u00e1y n\u00e0y <em>kh\u00f4ng<\/em> nh\u1ea5n n\u00fat; n\u00f3 \u201cc\u1ea5p\u201d cho b\u1ed9 ng\u1eaft m\u1ea1ch <em>b\u1ea5t<\/em> d\u00f2ng \u0111i\u1ec7n.<br \/>\nCh\u00fang t\u00f4i b\u1eaft \u0111\u1ea7u \u2018c\u1ea5p\u2019 n\u00f3. 500 Amps\u2026 600 Amps\u2026 800 Amps\u2026<\/p>\n<p><em>Kh\u00f4ng c\u00f3 g\u00ec.<\/em><\/p>\n<p>Aptomat <em>t\u1eeb ch\u1ed1i<\/em> \u0111\u1ec3 ng\u1eaft. Ch\u00fang t\u00f4i \u0111\u1ea9y n\u00f3 l\u00ean \u0111\u1ebfn 1200A tr\u01b0\u1edbc khi cu\u1ed1i c\u00f9ng n\u00f3, mi\u1ec5n c\u01b0\u1ee1ng, m\u1edf ra.<\/p>\n<p>C\u00e1i 400A <strong>\u201cB\u1ed9 ng\u1eaft m\u1ea1ch\u201d<\/strong> \u0111\u00e3 ch\u1ebft t\u1eeb nhi\u1ec1u n\u0103m tr\u01b0\u1edbc. N\u00f3 ch\u1ec9 l\u00e0 m\u1ed9t 400A <strong>\u201cC\u00f4ng t\u1eafc.\u201d<\/strong><\/p>\n<p>Trong 20 n\u0103m, to\u00e0n b\u1ed9 d\u00e2y chuy\u1ec1n nh\u00e0 m\u00e1y \u0111\u00f3 \u0111\u00e3 <em>zero<\/em> kh\u00f4ng c\u00f3 b\u1ea3o v\u1ec7 qu\u00e1 t\u1ea3i. M\u1ee1 b\u00ean trong b\u1ed9 ng\u1eaft m\u1ea1ch \u0111\u00e3 kh\u00f4. C\u00e1c l\u00f2 xo \u0111\u00e3 y\u1ebfu. \u201cB\u1ed9 n\u00e3o\u201d (b\u1ed9 ph\u1eadn nhi\u1ec7t) \u0111\u00e3 ch\u1ebft.<\/p>\n<p>\u0110\u00f3 l\u00e0 m\u1ed9t \u201cqu\u1ea3 bom h\u1eb9n gi\u1edd\u201d \u0111\u00e3 v\u01b0\u1ee3t qua \u201cb\u00e0i ki\u1ec3m tra gi\u1ea3 d\u01b0\u1ee3c\u201d c\u1ee7a n\u00f3 m\u1ed7i n\u0103m.<\/p>\n<hr \/>\n<h2>Nh\u1eefng <em>Th\u1eadt<\/em> Ki\u1ec3m tra: \u201cC\u1ea5p n\u0103ng l\u01b0\u1ee3ng cho Qu\u00e1i th\u00fa\u201d (Ti\u00eam d\u00f2ng \u0111i\u1ec7n s\u01a1 c\u1ea5p)<\/h2>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-19973\" src=\"https:\/\/test.viox.com\/wp-content\/uploads\/2025\/11\/The-Real-Test-22Feeding-the-Beast22-Primary-Current-Injection.webp\" alt=\"The Real Test: &quot;Feeding the Beast&quot; (Primary Current Injection)\" width=\"800\" height=\"800\" srcset=\"https:\/\/test.viox.com\/wp-content\/uploads\/2025\/11\/The-Real-Test-22Feeding-the-Beast22-Primary-Current-Injection.webp 800w, https:\/\/test.viox.com\/wp-content\/uploads\/2025\/11\/The-Real-Test-22Feeding-the-Beast22-Primary-Current-Injection-300x300.webp 300w, https:\/\/test.viox.com\/wp-content\/uploads\/2025\/11\/The-Real-Test-22Feeding-the-Beast22-Primary-Current-Injection-150x150.webp 150w, https:\/\/test.viox.com\/wp-content\/uploads\/2025\/11\/The-Real-Test-22Feeding-the-Beast22-Primary-Current-Injection-768x768.webp 768w, https:\/\/test.viox.com\/wp-content\/uploads\/2025\/11\/The-Real-Test-22Feeding-the-Beast22-Primary-Current-Injection-12x12.webp 12w, https:\/\/test.viox.com\/wp-content\/uploads\/2025\/11\/The-Real-Test-22Feeding-the-Beast22-Primary-Current-Injection-600x600.webp 600w, https:\/\/test.viox.com\/wp-content\/uploads\/2025\/11\/The-Real-Test-22Feeding-the-Beast22-Primary-Current-Injection-100x100.webp 100w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/><\/p>\n<p>V\u00ec v\u1eady, l\u00e0m th\u1ebf n\u00e0o \u0111\u1ec3 b\u1ea1n <em>th\u1ef1c s\u1ef1<\/em> ki\u1ec3m tra m\u1ed9t MCCB? L\u00e0m th\u1ebf n\u00e0o \u0111\u1ec3 b\u1ea1n ki\u1ec3m tra \u201cc\u1ea3m bi\u1ebfn kh\u00f3i\u201d, kh\u00f4ng ch\u1ec9 \u201cc\u00f2i\u201d?<\/p>\n<p>B\u1ea1n <strong>\u201cC\u1ea5p n\u0103ng l\u01b0\u1ee3ng cho Qu\u00e1i th\u00fa.\u201d<\/strong><\/p>\n<p>\u0110\u00e2y kh\u00f4ng ph\u1ea3i l\u00e0 c\u00f4ng vi\u1ec7c d\u00e0nh cho m\u1ed9t th\u1ee3 \u0111i\u1ec7n ti\u00eau chu\u1ea9n; \u0111\u00f3 l\u00e0 c\u00f4ng vi\u1ec7c d\u00e0nh cho m\u1ed9t K\u1ef9 s\u01b0 H\u1ec7 th\u1ed1ng \u0110i\u1ec7n NETA (Hi\u1ec7p h\u1ed9i Ki\u1ec3m tra \u0110i\u1ec7n Qu\u1ed1c t\u1ebf) chuy\u00ean bi\u1ec7t.<\/p>\n<ul>\n<li><strong>C\u00f4ng c\u1ee5:<\/strong> M\u1ed9t \u201cB\u1ed9 ki\u1ec3m tra MCCB\u201d d\u00f2ng \u0111i\u1ec7n cao chuy\u00ean d\u1ee5ng. M\u00e1y n\u00e0y th\u01b0\u1eddng c\u00f3 k\u00edch th\u01b0\u1edbc b\u1eb1ng m\u1ed9t chi\u1ebfc vali l\u1edbn, n\u1eb7ng 50kg v\u00e0 c\u00f3 th\u1ec3 c\u00f3 gi\u00e1 20.000 \u0111\u00f4 la tr\u1edf l\u00ean.<\/li>\n<li><strong>Quy tr\u00ecnh:<\/strong> K\u1ef9 s\u01b0 c\u00e1ch ly b\u1ed9 ng\u1eaft m\u1ea1ch v\u00e0 k\u1ebft n\u1ed1i \u201cQu\u00e1i th\u00fa\u201d n\u00e0y v\u1edbi n\u00f3. Sau \u0111\u00f3, m\u00e1y <em>th\u1ef1c s\u1ef1<\/em> ti\u00eam 500A, 1000A ho\u1eb7c 3000A d\u00f2ng \u0111i\u1ec7n th\u1ef1c, c\u00f3 th\u1ec3 truy nguy\u00ean <em>th\u00f4ng qua<\/em> \u201cb\u1ed9 n\u00e3o\u201d c\u1ee7a b\u1ed9 ng\u1eaft m\u1ea1ch.\u201d<\/li>\n<li><strong>K\u1ebft Qu\u1ea3:<\/strong> H\u1ecd s\u1eed d\u1ee5ng \u0111\u1ed3ng h\u1ed3 b\u1ea5m gi\u1edd (ho\u1eb7c b\u1ed9 h\u1eb9n gi\u1edd t\u00edch h\u1ee3p) \u0111\u1ec3 \u201c\u0111ua\u201d b\u1ed9 ng\u1eaft m\u1ea1ch so v\u1edbi <em>\u0111\u00e3 bi\u1ebft<\/em> \u0111\u01b0\u1eddng cong ng\u1eaft (TCC, ho\u1eb7c \u0110\u01b0\u1eddng cong Th\u1eddi gian-D\u00f2ng \u0111i\u1ec7n).\n<ul>\n<li>\u201cN\u00f3 c\u00f3 ng\u1eaft \u1edf 800A trong 5-10 gi\u00e2y \u0111\u01b0\u1ee3c ch\u1ec9 \u0111\u1ecbnh kh\u00f4ng?\u201d (B\u1ed9 n\u00e3o nhi\u1ec7t: <strong>\u0110\u1ea0T<\/strong>)<\/li>\n<li>\u201cN\u00f3 c\u00f3 ng\u1eaft \u1edf 3000A trong 0,04 gi\u00e2y kh\u00f4ng?\u201d (B\u1ed9 n\u00e3o t\u1eeb t\u00ednh: <strong>\u0110\u1ea0T<\/strong>)<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<blockquote><p><strong>M\u1eb8O CHUY\u00caN NGHI\u1ec6P:<\/strong> M\u1ed9t th\u1ee3 \u0111i\u1ec7n <em>l\u1eafp \u0111\u1eb7t<\/em> b\u1ed9 ng\u1eaft m\u1ea1ch v\u00e0 th\u1ef1c hi\u1ec7n ki\u1ec3m tra PTT (c\u01a1 h\u1ecdc). M\u1ed9t K\u1ef9 s\u01b0 Ki\u1ec3m tra NETA <em>ch\u1ee9ng nh\u1eadn<\/em> b\u1ed9 ng\u1eaft m\u1ea1ch b\u1eb1ng ki\u1ec3m tra Ti\u00eam d\u00f2ng \u0111i\u1ec7n s\u01a1 c\u1ea5p (\u0111i\u1ec7n). Bi\u1ebft vai tr\u00f2 c\u1ee7a b\u1ea1n. Kh\u00f4ng bao gi\u1edd k\u00fd v\u00e0o m\u1ed9t b\u00e0i ki\u1ec3m tra PTT nh\u01b0 m\u1ed9t \u201cb\u00e0i ki\u1ec3m tra an to\u00e0n ch\u1ee9c n\u0103ng\u201d. B\u1ea1n \u0111ang k\u00fd v\u00e0o \u201chy v\u1ecdng\u201d, kh\u00f4ng ph\u1ea3i \u201cki\u1ebfn th\u1ee9c\u201d.\u201d<\/p><\/blockquote>\n<hr \/>\n<h2>K\u1ebft lu\u1eadn: \u201cS\u1ef1 an t\u00e2m\u201d so v\u1edbi \u201cAn to\u00e0n th\u1ef1c t\u1ebf\u201d<\/h2>\n<p>N\u00fat \u201cKi\u1ec3m tra\u201d nh\u1ecf \u0111\u00f3 kh\u00f4ng ph\u1ea3i l\u00e0 m\u1ed9t <em>ki\u1ec3m tra<\/em>. \u0110\u00f3 l\u00e0 m\u1ed9t \u201cthi\u1ebft l\u1eadp l\u1ea1i c\u01a1 h\u1ecdc\u201d. N\u00f3 l\u00e0 <strong>\u201cN\u00fat \u2018Gi\u1ea3 d\u01b0\u1ee3c\u2019.\u201d<\/strong><\/p>\n<p>N\u00f3 \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf \u0111\u1ec3 mang l\u1ea1i cho ng\u01b0\u1eddi qu\u1ea3n l\u00fd t\u00f2a nh\u00e0 ho\u1eb7c m\u1ed9t ng\u01b0\u1eddi kh\u00f4ng chuy\u00ean nghi\u1ec7p \u201cS\u1ef1 an t\u00e2m\u201d.\u201d<\/p>\n<p>Nh\u1eefng <em>b\u1ea5t<\/em> ki\u1ec3m tra, \u201cTi\u00eam d\u00f2ng \u0111i\u1ec7n s\u01a1 c\u1ea5p\u201d, l\u00e0 nh\u1eefng g\u00ec cung c\u1ea5p <strong>\u201cAn to\u00e0n th\u1ef1c t\u1ebf.\u201d<\/strong><\/p>\n<p>Khi b\u1ea1n x\u00e2y d\u1ef1ng m\u1ed9t h\u1ec7 th\u1ed1ng quan tr\u1ecdng, b\u1ea1n x\u00e2y d\u1ef1ng n\u00f3 tr\u00ean <em>s\u1ef1 ch\u1eafc ch\u1eafn<\/em>. MCCB VIOX \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf theo c\u00e1c ti\u00eau chu\u1ea9n cao nh\u1ea5t, v\u1edbi c\u00e1c \u0111\u01b0\u1eddng cong ng\u1eaft r\u00f5 r\u00e0ng, s\u1eb5n s\u00e0ng \u0111\u1ec3 <em>\u0111\u01b0\u1ee3c ch\u1ee9ng nh\u1eadn<\/em> b\u1edfi m\u1ed9t b\u1ed9 ki\u1ec3m tra chuy\u00ean nghi\u1ec7p. \u0110\u1eebng ch\u1ec9 <em>hy v\u1ecdng<\/em> \u201cb\u1ed9 n\u00e3o\u201d c\u1ee7a b\u1ea1n ho\u1ea1t \u0111\u1ed9ng\u2014<em>bi\u1ebft<\/em> ch\u00fang l\u00e0m.<\/p>\n<p><strong>Duy\u1ec7t qua c\u1ee7a ch\u00fang t\u00f4i<a href=\"https:\/\/test.viox.com\/vi\/mccb\/\"> MCCB VIOX<\/a> d\u00f2ng s\u1ea3n ph\u1ea9m v\u00e0 x\u00e2y d\u1ef1ng v\u1edbi s\u1ef1 ch\u1eafc ch\u1eafn.<\/strong><\/p>\n<hr \/>\n<h3>K\u1ef9 Thu\u1eadt Ch\u00ednh X\u00e1c Ch\u00fa \u00dd<\/h3>\n<pre><code>**Ti\u00eau chu\u1ea9n &amp; Ngu\u1ed3n tham kh\u1ea3o** <a href=\"https:\/\/webstore.iec.ch\/en\/publication\/66277\" rel=\"nofollow noopener\" target=\"_blank\">TRUY\u1ec0N th\u00f4ng 60947-2<\/a> v\u00e0 NEMA AB 1.\n<\/code><\/pre>\n<\/div>","protected":false},"excerpt":{"rendered":"<p>You&#8217;re on-site, in front of a giant 400A MCCB (Moulded Case Circuit Breaker) that acts as the &#8220;main gate&#8221; for a critical factory line. You need to &#8220;test&#8221; it. You see the little &#8220;Push-to-Trip&#8221; (PTT) button. You press it. CLUNK. The breaker trips. Your job is done, right? You&#8217;ve &#8220;tested&#8221; the breaker? No. You&#8217;ve done [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":19975,"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-19965","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\/19965","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=19965"}],"version-history":[{"count":6,"href":"https:\/\/test.viox.com\/vi\/wp-json\/wp\/v2\/posts\/19965\/revisions"}],"predecessor-version":[{"id":19977,"href":"https:\/\/test.viox.com\/vi\/wp-json\/wp\/v2\/posts\/19965\/revisions\/19977"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/test.viox.com\/vi\/wp-json\/wp\/v2\/media\/19975"}],"wp:attachment":[{"href":"https:\/\/test.viox.com\/vi\/wp-json\/wp\/v2\/media?parent=19965"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/test.viox.com\/vi\/wp-json\/wp\/v2\/categories?post=19965"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/test.viox.com\/vi\/wp-json\/wp\/v2\/tags?post=19965"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}