{"id":3719,"date":"2022-11-22T15:38:51","date_gmt":"2022-11-22T08:38:51","guid":{"rendered":"https:\/\/bestray.com\/blog\/?p=3719"},"modified":"2024-02-27T15:55:02","modified_gmt":"2024-02-27T08:55:02","slug":"vai-tro-cua-role-nhiet","status":"publish","type":"post","link":"https:\/\/bestray.com\/blog\/vai-tro-cua-role-nhiet\/","title":{"rendered":"Vai tr\u00f2 c\u1ee7a r\u01a1le nhi\u1ec7t trong h\u1ec7 th\u1ed1ng \u0111i\u1ec7n d\u00e2n d\u1ee5ng v\u00e0 c\u00f4ng nghi\u1ec7p"},"content":{"rendered":"

R\u01a1le nhi\u1ec7t<\/b> l\u00e0 b\u1ed9 ph\u1eadn quan tr\u1ecdng kh\u00f4ng th\u1ec3 thi\u1ebfu trong m\u1ea1ch, n\u00f3 c\u00f3 ch\u1ee9c n\u0103ng \u0111\u1ea3m b\u1ea3o c\u00e1c thi\u1ebft b\u1ecb \u0111i\u1ec7n<\/strong><\/a> ho\u1ea1t \u0111\u1ed9ng \u1ed5n \u0111\u1ecbnh khi d\u00f2ng \u0111i\u1ec7n b\u1ecb qu\u00e1 t\u1ea3i. Hi\u1ec7n nay, thi\u1ebft b\u1ecb \u0111i\u1ec7n n\u00e0y \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng kh\u00e1 ph\u1ed5 bi\u1ebfn b\u1edfi hi\u1ec7u qu\u1ea3 cao v\u00e0 gi\u00e1 th\u00e0nh kh\u00e1 ph\u1ea3i ch\u0103ng. Tuy \u0111\u01b0\u1ee3c nhi\u1ec1u ng\u01b0\u1eddi s\u1eed d\u1ee5ng nh\u01b0ng kh\u00f4ng ph\u1ea3i ai c\u0169ng hi\u1ec3u r\u01a1le nhi\u1ec7t l\u00e0 g\u00ec, c\u1ea5u t\u1ea1o c\u0169ng nh\u01b0 nguy\u00ean l\u00fd ho\u1ea1t \u0111\u1ed9ng c\u1ee7a n\u00f3. V\u1eady h\u00e3y c\u00f9ng Bestray<\/strong><\/a> t\u00ecm hi\u1ec3u th\u00eam nh\u1eefng th\u00f4ng tin th\u00fa v\u1ecb v\u1ec1 r\u01a1le nhi\u1ec7t \u0111\u1ec3 s\u1eed d\u1ee5ng an to\u00e0n v\u00e0 hi\u1ec7u qu\u1ea3!<\/span><\/p>\n

\u00a01. \u0110\u00f4i n\u00e9t v\u1ec1 r\u01a1le nhi\u1ec7t<\/strong><\/h2>\n

R\u01a1le<\/a> nhi\u1ec7t<\/strong><\/em> hay c\u00f2n g\u1ecdi l\u00e0 relay, \u0111\u00e2y l\u00e0 d\u1ee5ng c\u1ee5 th\u01b0\u1eddng \u0111\u01b0\u1ee3c l\u1eafp \u0111\u1eb7t c\u00f9ng v\u1edbi kh\u1edfi \u0111\u1ed9ng t\u1eeb gi\u00fap b\u1ea3o v\u1ec7 qu\u00e1 t\u1ea3i cho c\u00e1c thi\u1ebft b\u1ecb \u0111i\u1ec7n. R\u01a1le nhi\u1ec7t ch\u1ec9 c\u00f3 th\u1ec3 b\u1ea3o v\u1ec7 qu\u00e1 t\u1ea3i ch\u1ee9 kh\u00f4ng b\u1ea3o v\u1ec7 ng\u1eafn m\u1ea1ch. N\u1ebfu mu\u1ed1n b\u1ea3o v\u1ec7 ng\u1eafn m\u1ea1ch th\u00ec c\u1ea7n l\u1eafp \u0111\u1eb7t r\u01a1le nhi\u1ec7t c\u00f9ng v\u1edbi c\u1ea7u ch\u00ec ho\u1eb7c aptomat. R\u01a1le nhi\u1ec7t c\u00f3 kh\u1ea3 n\u0103ng t\u1ef1 \u0111\u1ed9ng \u0111\u00f3ng c\u1eaft c\u00e1c ti\u1ebfp \u0111i\u1ec3m nh\u1edd s\u1ef1 gi\u00e3n n\u1edf v\u00ec nhi\u1ec7t c\u1ee7a c\u00e1c thanh kim lo\u1ea1i. Ngo\u00e0i b\u1ea3o v\u1ec7 qu\u00e1 t\u1ea3i th\u00ec r\u01a1le nhi\u1ec7t c\u00f2n c\u00f3 ch\u1ee9c n\u0103ng gi\u00e1m s\u00e1t c\u00e1c h\u1ec7 th\u1ed1ng an to\u00e0n trong khu c\u00f4ng nghi\u1ec7p v\u00e0 ng\u1eaft \u0111i\u1ec7n cho c\u00e1c lo\u1ea1i m\u00e1y m\u00f3c \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o \u0111\u1ed9 an to\u00e0n.<\/span><\/p>\n

Ng\u00e0y nay \u0111\u1ec3 ph\u00f9 h\u1ee3p v\u1edbi nhu c\u1ea7u s\u1eed d\u1ee5ng th\u00ec c\u00f3 c\u00e1c lo\u1ea1i r\u01a1le nhi\u1ec7t s\u1eed d\u1ee5ng trong d\u00f2ng \u0111i\u1ec7n xoay chi\u1ec1u 500V – 50Hz. Ngo\u00e0i ra c\u00f3 m\u1ed9t s\u1ed1 lo\u1ea1i m\u1edbi c\u00f3 c\u01b0\u1eddng \u0111\u1ed9 d\u00f2ng \u0111i\u1ec7n l\u00ean t\u1edbi 150A – 440V ph\u00f9 h\u1ee3p v\u1edbi d\u00f2ng \u0111i\u1ec7n m\u1ed9t chi\u1ec1u.<\/span><\/p>\n

R\u01a1le nhi\u1ec7t \u0111\u01b0\u1ee3c \u1ee9ng d\u1ee5ng trong c\u00e1c h\u1ec7 th\u1ed1ng \u0111i\u1ec7n kh\u00e1c nhau nh\u01b0 h\u1ec7 th\u1ed1ng \u0111i\u1ec7n d\u00e2n d\u1ee5ng, c\u00e1c nh\u00e0 m\u00e1y, c\u01a1 quan, tr\u01b0\u1eddng h\u1ecdc nh\u1eb1m b\u1ea3o v\u1ec7 qu\u00e1 t\u1ea3i cho c\u00e1c thi\u1ebft b\u1ecb \u0111i\u1ec7n c\u1ee7a c\u00e1c h\u1ed9 gia \u0111\u00ecnh c\u0169ng nh\u01b0 m\u00e1y m\u00f3c \u1edf c\u00e1c nh\u00e0 m\u00e1y, khu c\u00f4ng x\u01b0\u1edfng.<\/span><\/p>\n

Hi\u1ec7n nay r\u01a1le nhi\u1ec7t \u0111\u01b0\u1ee3c r\u1ea5t nhi\u1ec1u th\u01b0\u01a1ng hi\u1ec7u s\u1ea3n xu\u1ea5t nh\u01b0 Mitsubishi, LS, Schneider, Eaton,…<\/span><\/p>\n

2. C\u1ea5u t\u1ea1o, nguy\u00ean l\u00fd ho\u1ea1t \u0111\u1ed9ng c\u1ee7a r\u01a1le nhi\u1ec7t<\/strong><\/h2>\n

2.1. C\u1ea5u t\u1ea1o<\/strong><\/h3>\n

R\u01a1le nhi\u1ec7t c\u00f3 c\u1ea5u t\u1ea1o r\u1ea5t \u0111\u01a1n gi\u1ea3n, g\u1ed3m c\u00e1c b\u1ed9 ph\u1eadn sau:<\/span><\/p>\n

    \n
  1. \u0110\u00f2n b\u1ea9y<\/span><\/li>\n
  2. Ti\u1ebfp \u0111i\u1ec3m th\u01b0\u1eddng \u0111\u00f3ng (NC)<\/span><\/li>\n
  3. Ti\u1ebfp \u0111i\u1ec3m th\u01b0\u1eddng m\u1edf (NO)<\/span><\/li>\n
  4. V\u00edt \u0111i\u1ec1u ch\u1ec9nh d\u00f2ng \u0111i\u1ec7n t\u00e1c \u0111\u1ed9ng<\/span><\/li>\n
  5. Thanh l\u01b0\u1ee1ng kim<\/span><\/li>\n
  6. D\u00e2y \u0111\u1ed1t n\u00f3ng\u00a0<\/span><\/li>\n
  7. C\u1ea7n g\u1ea1t<\/span><\/li>\n
  8. N\u00fat ph\u1ee5c h\u1ed3i (Reset)<\/span><\/li>\n<\/ol>\n
    \"T\u00ecm
    C\u00e1c b\u1ed9 ph\u1eadn t\u01b0\u01a1ng \u1ee9ng c\u1ee7a thi\u1ebft b\u1ecb r\u01a1le nhi\u1ec7t<\/figcaption><\/figure>\n

    2.2. Nguy\u00ean l\u00fd ho\u1ea1t \u0111\u1ed9ng<\/strong><\/h3>\n

    R\u01a1le nhi\u1ec7t d\u1ef1a tr\u00ean nguy\u00ean l\u00fd ho\u1ea1t \u0111\u1ed9ng l\u00e0 thay \u0111\u1ed5i nhi\u1ec7t \u0111\u1ed9 c\u1ee7a d\u00f2ng \u0111i\u1ec7n. D\u00f2ng \u0111i\u1ec7n qu\u00e1 t\u1ea3i s\u1ebd sinh ra m\u1ed9t l\u01b0\u1ee3ng nhi\u1ec7t l\u1edbn l\u00e0m \u0111\u1ed1t n\u00f3ng t\u1ea5m kim lo\u1ea1i c\u1ee7a r\u01a1le nhi\u1ec7t d\u1eabn \u0111\u1ebfn t\u00ecnh tr\u1ea1ng b\u1ecb gi\u00e3n n\u1edf. Phi\u1ebfn kim lo\u1ea1i k\u00e9p gi\u00fap thi\u1ebft b\u1ecb ho\u1ea1t \u0111\u1ed9ng hi\u1ec7u qu\u1ea3 v\u00e0 c\u0169ng l\u00e0 m\u1ed9t ph\u1ea7n r\u1ea5t quan tr\u1ecdng trong c\u00e1c th\u00e0nh ph\u1ea7n c\u1ee7a r\u01a1le nhi\u1ec7t. \u0110\u00e2y l\u00e0 b\u1ed9 ph\u1eadn \u0111\u01b0\u1ee3c t\u1ea1o th\u00e0nh t\u1eeb hai th\u00e0nh kim lo\u1ea1i c\u00f3 \u0111\u1ed9 gi\u00e3n n\u1edf kh\u00e1c nhau gh\u00e9p l\u1ea1i. Th\u00f4ng th\u01b0\u1eddng thanh kim lo\u1ea1i c\u00f3 kh\u1ea3 n\u0103ng gi\u00e3n n\u1edf th\u1ea5p h\u01a1n v\u00e0 \u0111\u01b0\u1ee3c l\u00e0m t\u1eeb ch\u1ea5t li\u1ec7u invar v\u1edbi 64% l\u00e0 S\u1eaft v\u00e0 36% l\u00e0 Ni. C\u00f2n \u0111\u1ed1i v\u1edbi th\u00e0nh kim lo\u1ea1i th\u1ee9 2 th\u00ec c\u00f3 ch\u1ec9 s\u1ed1 gi\u00e3n n\u1edf l\u1edbn h\u01a1n v\u00e0 l\u00e0m t\u1eeb ch\u1ea5t li\u1ec7u \u0111\u1ed3ng thau ho\u1eb7c th\u00e9p niken-crom, c\u00f3 t\u1ec9 l\u1ec7 gi\u00e3n n\u1edf so v\u1edbi invar l\u00e0 1:20.<\/span><\/p>\n

    Khi nh\u1eadn th\u1ea5y d\u00f2ng \u0111i\u1ec7n trong h\u1ec7 th\u1ed1ng thay \u0111\u1ed5i \u0111\u1ed9t ng\u1ed9t, c\u00f3 l\u01b0\u1ee3ng nhi\u1ec7t l\u1edbn sinh ra v\u00e0 t\u1ea1o ra t\u00e1c \u0111\u1ed9ng trong thanh th\u00e9p k\u00e9p khi\u1ebfn n\u00f3 u\u1ed1n l\u1ea1i theo chi\u1ec1u thanh kim lo\u1ea1i c\u00f3 kh\u1ea3 n\u0103ng gi\u00e3n n\u1edf th\u1ea5p h\u01a1n \u0111\u1ec3 d\u00f2ng \u0111i\u1ec7n ch\u1ea1y qua. \u0110\u1ed9 cong c\u1ee7a thanh kim lo\u1ea1i s\u1ebd ph\u1ee5 thu\u1ed9c v\u00e0o \u0111\u1ed9 d\u00e0y v\u00e0 \u0111\u1ed9 d\u00e0i c\u1ee7a n\u00f3. Phi\u1ebfn kim lo\u1ea1i d\u00e0i v\u00e0 m\u1ecfng s\u1ebd gi\u00fap u\u1ed1n cong l\u1edbn h\u01a1n, c\u00f2n n\u1ebfu mu\u1ed1n l\u1ef1c \u0111\u1ea9y m\u1ea1nh th\u00ec c\u1ea7n phi\u1ebfn kim lo\u1ea1i ng\u1eafn, r\u1ed9ng v\u00e0 d\u00e0y.<\/span><\/p>\n

    3. R\u01a1le nhi\u1ec7t hi\u1ec7n nay c\u00f3 m\u1ea5y lo\u1ea1i?<\/strong><\/h2>\n

    \u0110\u1ec3 ph\u00e2n lo\u1ea1i \u0111\u01b0\u1ee3c c\u00e1c lo\u1ea1i r\u01a1le nhi\u1ec7t th\u00ec c\u1ea7n d\u1ef1a v\u00e0o m\u1ed9t s\u1ed1 ti\u00eau ch\u00ed nh\u01b0:<\/span><\/p>\n