{"id":1590,"date":"2025-05-20T21:35:18","date_gmt":"2025-05-20T14:35:18","guid":{"rendered":"https:\/\/mienbacelectric.com\/?p=1590"},"modified":"2025-05-21T00:02:35","modified_gmt":"2025-05-20T17:02:35","slug":"tieu-chuan-ky-thuat-may-bien-ap-phan-phoi-theo-quyet-dinh-62-evn","status":"publish","type":"post","link":"https:\/\/mienbacelectric.com\/?p=1590","title":{"rendered":"Ti\u00eau chu\u1ea9n k\u1ef9 thu\u1eadt m\u00e1y bi\u1ebfn \u00e1p ph\u00e2n ph\u1ed1i theo quy\u1ebft \u0111\u1ecbnh 62-EVN"},"content":{"rendered":"

PH\u1ea6N I: QUY \u0110\u1ecaNH CHUNG<\/strong><\/h3>\n

1. \u0110i\u1ec1u 1: Ph\u1ea1m vi \u0111i\u1ec1u ch\u1ec9nh v\u00e0 \u0111\u1ed1i t\u01b0\u1ee3ng \u00e1p d\u1ee5ng<\/strong><\/h4>\n
1.1. Ph\u1ea1m vi \u0111i\u1ec1u ch\u1ec9nh:<\/strong><\/h5>\n

Ti\u00eau chu\u1ea9n n\u00e0y quy \u0111\u1ecbnh v\u1ec1 l\u1ef1a ch\u1ecdn m\u00e1y bi\u1ebfn \u00e1p ph\u00e2n ph\u1ed1i, t\u1ef1 d\u00f9ng, ng\u00e2m trong d\u1ea7u, \u0111i\u1ec7n \u00e1p 35kV trong T\u1eadp \u0111o\u00e0n \u0110i\u1ec7n l\u1ef1c Qu\u1ed1c gia Vi\u1ec7t Nam (EVN).<\/p>\n

1.2. \u0110\u1ed1i t\u01b0\u1ee3ng \u00e1p d\u1ee5ng:<\/strong><\/h5>\n

Ti\u00eau chu\u1ea9n n\u00e0y \u00e1p d\u1ee5ng \u0111\u1ed1i v\u1edbi:<\/p>\n

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  • \n

    T\u1eadp \u0111o\u00e0n \u0110i\u1ec7n l\u1ef1c Vi\u1ec7t Nam (Doanh nghi\u1ec7p c\u1ea5p I)<\/p>\n<\/li>\n

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    C\u00f4ng ty con c\u1ee7a T\u1eadp \u0111o\u00e0n \u0110i\u1ec7n l\u1ef1c Vi\u1ec7t Nam (Doanh nghi\u1ec7p c\u1ea5p II)<\/p>\n<\/li>\n

  • \n

    C\u00f4ng ty con c\u1ee7a Doanh nghi\u1ec7p c\u1ea5p II (Doanh nghi\u1ec7p c\u1ea5p III)<\/p>\n<\/li>\n

  • \n

    Ng\u01b0\u1eddi \u0111\u1ea1i di\u1ec7n theo \u1ee7y quy\u1ec1n \u0111\u1ed1i v\u1edbi ph\u1ea7n v\u1ed1n g\u00f3p c\u1ee7a EVN t\u1ea1i c\u00f4ng ty con, c\u00f4ng ty li\u00ean k\u1ebft<\/p>\n<\/li>\n<\/ul>\n

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    2. \u0110i\u1ec1u 2: Thu\u1eadt ng\u1eef v\u00e0 \u0110\u1ecbnh ngh\u0129a<\/strong><\/h4>\n

    Trong ti\u00eau chu\u1ea9n n\u00e0y, c\u00e1c thu\u1eadt ng\u1eef \u0111\u01b0\u1ee3c hi\u1ec3u nh\u01b0 sau:<\/p>\n

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    • \n

      IEC (International Electrotechnical Commission)<\/strong>: \u1ee6y ban K\u1ef9 thu\u1eadt \u0110i\u1ec7n Qu\u1ed1c t\u1ebf.<\/p>\n<\/li>\n

    • \n

      IEEE (Institute of Electrical and Electronics Engineers)<\/strong>: Vi\u1ec7n c\u00e1c K\u1ef9 s\u01b0 \u0110i\u1ec7n v\u00e0 \u0110i\u1ec7n t\u1eed Hoa K\u1ef3.<\/p>\n<\/li>\n

    • \n

      ISO (International Organization for Standardization)<\/strong>: T\u1ed5 ch\u1ee9c Ti\u00eau chu\u1ea9n h\u00f3a Qu\u1ed1c t\u1ebf.<\/p>\n<\/li>\n

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      M\u00e1y bi\u1ebfn \u00e1p ph\u00e2n ph\u1ed1i (Distribution Transformer)<\/strong>: M\u00e1y bi\u1ebfn \u00e1p d\u00f9ng \u0111\u1ec3 truy\u1ec1n t\u1ea3i \u0111i\u1ec7n n\u0103ng t\u1eeb m\u1ea1ch ph\u00e2n ph\u1ed1i s\u01a1 c\u1ea5p \u0111\u1ebfn m\u1ea1ch ph\u00e2n ph\u1ed1i th\u1ee9 c\u1ea5p ho\u1eb7c ph\u1ee5c v\u1ee5 h\u1ed9 ti\u00eau th\u1ee5 \u0111i\u1ec7n.<\/p>\n<\/li>\n

    • \n

      Cu\u1ed9n d\u00e2y (Winding)<\/strong>: T\u1eadp h\u1ee3p c\u00e1c v\u00f2ng d\u00e2y t\u1ea1o th\u00e0nh m\u1ea1ch \u0111i\u1ec7n n\u1ed1i v\u00e0o m\u1ed9t trong c\u00e1c \u0111i\u1ec7n \u00e1p \u1ea5n \u0111\u1ecbnh cho m\u00e1y bi\u1ebfn \u00e1p.<\/p>\n<\/li>\n

    • \n

      Cu\u1ed9n d\u00e2y \u0111i\u1ec7n \u00e1p cao (High-voltage Winding-HV)<\/strong>: Cu\u1ed9n d\u00e2y c\u00f3 \u0111i\u1ec7n \u00e1p \u0111\u1ecbnh m\u1ee9c cao nh\u1ea5t.<\/p>\n<\/li>\n

    • \n

      Cu\u1ed9n d\u00e2y \u0111i\u1ec7n \u00e1p th\u1ea5p (Low-voltage Winding-LV)<\/strong>: Cu\u1ed9n d\u00e2y c\u00f3 \u0111i\u1ec7n \u00e1p \u0111\u1ecbnh m\u1ee9c th\u1ea5p nh\u1ea5t.<\/p>\n<\/li>\n

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      \u0110i\u1ec7n \u00e1p danh \u0111\u1ecbnh c\u1ee7a h\u1ec7 th\u1ed1ng \u0111i\u1ec7n (Nominal Voltage of a System)<\/strong>: Gi\u00e1 tr\u1ecb \u0111i\u1ec7n \u00e1p th\u00edch h\u1ee3p d\u00f9ng \u0111\u1ec3 \u0111\u1ecbnh r\u00f5 ho\u1eb7c nh\u1eadn d\u1ea1ng m\u1ed9t h\u1ec7 th\u1ed1ng \u0111i\u1ec7n.<\/p>\n<\/li>\n

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      \u0110i\u1ec7n \u00e1p v\u1eadn h\u00e0nh h\u1ec7 th\u1ed1ng \u0111i\u1ec7n (Operating Voltage in a System)<\/strong>: Tr\u1ecb s\u1ed1 \u0111i\u1ec7n \u00e1p trong \u0111i\u1ec1u ki\u1ec7n b\u00ecnh th\u01b0\u1eddng, t\u1ea1i m\u1ed9t th\u1eddi \u0111i\u1ec3m v\u00e0 t\u1ea1i m\u1ed9t \u0111i\u1ec3m \u0111\u00e3 cho c\u1ee7a h\u1ec7 th\u1ed1ng \u0111i\u1ec7n.<\/p>\n<\/li>\n

    • \n

      \u0110i\u1ec7n \u00e1p cao nh\u1ea5t (ho\u1eb7c th\u1ea5p nh\u1ea5t) c\u1ee7a h\u1ec7 th\u1ed1ng (Highest\/Lowest Voltage of a System)<\/strong>: Tr\u1ecb s\u1ed1 \u0111i\u1ec7n \u00e1p v\u1eadn h\u00e0nh cao nh\u1ea5t ho\u1eb7c th\u1ea5p nh\u1ea5t trong c\u00e1c \u0111i\u1ec1u ki\u1ec7n v\u1eadn h\u00e0nh b\u00ecnh th\u01b0\u1eddng c\u1ee7a h\u1ec7 th\u1ed1ng.<\/p>\n<\/li>\n<\/ul>\n

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      3. \u0110i\u1ec1u 3: C\u00e1c \u0111i\u1ec1u ki\u1ec7n chung<\/strong><\/h4>\n
      3.1. \u0110i\u1ec1u ki\u1ec7n m\u00f4i tr\u01b0\u1eddng l\u00e0m vi\u1ec7c c\u1ee7a thi\u1ebft b\u1ecb:<\/strong><\/h5>\n

      M\u00e1y bi\u1ebfn \u00e1p ph\u00e2n ph\u1ed1i ph\u1ea3i \u0111\u00e1p \u1ee9ng c\u00e1c \u0111i\u1ec1u ki\u1ec7n m\u00f4i tr\u01b0\u1eddng sau:<\/p>\n

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        Nhi\u1ec7t \u0111\u1ed9 m\u00f4i tr\u01b0\u1eddng l\u1edbn nh\u1ea5t: 45\u00b0C<\/p>\n<\/li>\n

      • \n

        Nhi\u1ec7t \u0111\u1ed9 m\u00f4i tr\u01b0\u1eddng nh\u1ecf nh\u1ea5t: 0\u00b0C<\/p>\n<\/li>\n

      • \n

        Kh\u00ed h\u1eadu: Nhi\u1ec7t \u0111\u1edbi, n\u00f3ng \u1ea9m<\/p>\n<\/li>\n

      • \n

        \u0110\u1ed9 \u1ea9m c\u1ef1c \u0111\u1ea1i: 100%<\/p>\n<\/li>\n

      • \n

        \u0110\u1ed9 cao l\u1eafp \u0111\u1eb7t thi\u1ebft b\u1ecb so v\u1edbi m\u1ef1c n\u01b0\u1edbc bi\u1ec3n: l\u00ean \u0111\u1ebfn 1000 m<\/p>\n<\/li>\n

      • \n

        V\u1eadn t\u1ed1c gi\u00f3 l\u1edbn nh\u1ea5t: 160 km\/h<\/p>\n<\/li>\n<\/ul>\n

        3.2. \u0110i\u1ec1u ki\u1ec7n v\u1eadn h\u00e0nh c\u1ee7a h\u1ec7 th\u1ed1ng \u0111i\u1ec7n:<\/strong><\/h5>\n

        C\u00e1c \u0111i\u1ec1u ki\u1ec7n v\u1eadn h\u00e0nh c\u1ee7a h\u1ec7 th\u1ed1ng \u0111i\u1ec7n s\u1ebd \u0111\u01b0\u1ee3c x\u00e1c \u0111\u1ecbnh t\u00f9y thu\u1ed9c v\u00e0o c\u00e1c y\u1ebfu t\u1ed1 kh\u00e1c nh\u01b0 v\u1ecb tr\u00ed l\u1eafp \u0111\u1eb7t, y\u00eau c\u1ea7u v\u1ec1 hi\u1ec7u su\u1ea5t v\u00e0 \u0111\u1ed9 an to\u00e0n trong qu\u00e1 tr\u00ecnh v\u1eadn h\u00e0nh.<\/p>\n

        \"Ti\u00eau<\/p>\n

        PH\u1ea6N II: Y\u00caU C\u1ea6U K\u1ef8 THU\u1eacT<\/strong><\/h3>\n

        4. \u0110i\u1ec1u 4: Y\u00eau c\u1ea7u chung<\/strong><\/h4>\n
        4.1. M\u00e1y bi\u1ebfn \u00e1p ph\u00e2n ph\u1ed1i (MBA)<\/strong><\/h5>\n

        M\u00e1y bi\u1ebfn \u00e1p ph\u00e2n ph\u1ed1i trong ti\u00eau chu\u1ea9n n\u00e0y c\u00f3 cu\u1ed9n d\u00e2y s\u01a1 c\u1ea5p v\u1edbi \u0111i\u1ec7n \u00e1p \u0111\u1ecbnh m\u1ee9c l\u00ean \u0111\u1ebfn 35 kV. Ti\u00eau chu\u1ea9n ch\u1ec9 \u00e1p d\u1ee5ng cho c\u00e1c lo\u1ea1i MBA ng\u00e2m d\u1ea7u, l\u00e0m m\u00e1t t\u1ef1 nhi\u00ean (ONAN).<\/p>\n

        4.2. Y\u00eau c\u1ea7u v\u1ec1 v\u1eadt li\u1ec7u v\u00e0 c\u00f4ng ngh\u1ec7 ch\u1ebf t\u1ea1o<\/strong><\/h5>\n

        T\u1ea5t c\u1ea3 v\u1eadt li\u1ec7u, c\u00f4ng ngh\u1ec7 ch\u1ebf t\u1ea1o, th\u1eed nghi\u1ec7m v\u00e0 thi\u1ebft b\u1ecb \u0111\u01b0\u1ee3c cung c\u1ea5p ph\u1ea3i tu\u00e2n th\u1ee7 c\u00e1c ti\u00eau chu\u1ea9n quy \u0111\u1ecbnh c\u1ee7a TCVN, ti\u00eau chu\u1ea9n qu\u1ed1c t\u1ebf, v\u00e0 ph\u00f9 h\u1ee3p v\u1edbi t\u1eebng v\u1ecb tr\u00ed l\u1eafp \u0111\u1eb7t, s\u1eed d\u1ee5ng. M\u00e1y bi\u1ebfn \u00e1p c\u1ea7n \u0111\u1ea3m b\u1ea3o hi\u1ec7u su\u1ea5t v\u1eadn h\u00e0nh \u1ed5n \u0111\u1ecbnh trong c\u1ea3 \u0111i\u1ec1u ki\u1ec7n b\u00ecnh th\u01b0\u1eddng v\u00e0 nh\u1eefng tr\u01b0\u1eddng h\u1ee3p b\u1ea5t l\u1ee3i, \u0111\u1ed3ng th\u1eddi \u0111\u1ea1t tu\u1ed5i th\u1ecd thi\u1ebft k\u1ebf y\u00eau c\u1ea7u.<\/p>\n

        4.3. Y\u00eau c\u1ea7u v\u1ec1 thi\u1ebft k\u1ebf v\u00e0 b\u1ea3o tr\u00ec<\/strong><\/h5>\n

        Thi\u1ebft k\u1ebf c\u1ee7a m\u00e1y bi\u1ebfn \u00e1p ph\u00e2n ph\u1ed1i ph\u1ea3i thu\u1eadn ti\u1ec7n cho vi\u1ec7c l\u1eafp \u0111\u1eb7t, thay th\u1ebf, v\u00e0 b\u1ea3o d\u01b0\u1ee1ng. \u0110\u1ed3ng th\u1eddi, c\u1ea7n gi\u1ea3m thi\u1ec3u t\u1ed1i \u0111a c\u00e1c r\u1ee7i ro g\u00e2y ch\u00e1y n\u1ed5 v\u00e0 t\u00e1c \u0111\u1ed9ng ti\u00eau c\u1ef1c \u0111\u1ebfn m\u00f4i tr\u01b0\u1eddng.<\/p>\n

        4.4. Lo\u1ea1i MBA kh\u00f4ng \u00e1p d\u1ee5ng<\/strong><\/h5>\n

        C\u00e1c lo\u1ea1i m\u00e1y bi\u1ebfn \u00e1p kh\u00f4, MBA chuy\u00ean d\u00f9ng, v\u00e0 MBA l\u1eafp \u0111\u1eb7t trong m\u00f4i tr\u01b0\u1eddng \u0111\u1eb7c bi\u1ec7t kh\u00f4ng \u0111\u01b0\u1ee3c \u0111\u1ec1 c\u1eadp trong ti\u00eau chu\u1ea9n n\u00e0y.<\/p>\n

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        5. \u0110i\u1ec1u 5: V\u1ecf m\u00e1y bi\u1ebfn \u00e1p<\/strong><\/h4>\n
        5.1. Thi\u1ebft k\u1ebf v\u1ecf m\u00e1y bi\u1ebfn \u00e1p<\/strong><\/h5>\n

        V\u1ecf m\u00e1y bi\u1ebfn \u00e1p ph\u1ea3i \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf ch\u1eafc ch\u1eafn, \u0111\u1ea3m b\u1ea3o kh\u1ea3 n\u0103ng n\u00e2ng h\u1ea1 v\u00e0 v\u1eadn chuy\u1ec3n m\u00e0 kh\u00f4ng b\u1ecb bi\u1ebfn d\u1ea1ng, h\u01b0 h\u1ecfng hay r\u00f2 r\u1ec9 d\u1ea7u. V\u1ecf m\u00e1y v\u00e0 ph\u1ea7n l\u1eafp tr\u00ean c\u1ea7n \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf sao cho kh\u00f4ng b\u1ecb \u0111\u1ecdng n\u01b0\u1edbc \u1edf c\u00e1c h\u1ed1c, khe, r\u00e3nh. \u0110\u1eb7c bi\u1ec7t, \u0111\u1ed1i v\u1edbi MBA c\u00f3 \u0111\u1ed3ng h\u1ed3 \u0111o nhi\u1ec7t \u0111\u1ed9, m\u1eb7t m\u00e1y ph\u1ea3i \u0111\u01b0\u1ee3c b\u1ed1 tr\u00ed c\u1ed1c ch\u00ecm c\u00f3 n\u1eafp \u0111\u1eady \u0111\u1ec3 l\u1eafp thi\u1ebft b\u1ecb \u0111o.<\/p>\n

        5.2. Th\u00f9ng m\u00e1y v\u00e0 b\u1ea3o v\u1ec7 \u00e1p l\u1ef1c<\/strong><\/h5>\n

        Th\u00f9ng m\u00e1y bi\u1ebfn \u00e1p ph\u1ea3i ch\u1ecbu \u0111\u01b0\u1ee3c \u00e1p l\u1ef1c t\u1ed1i thi\u1ec3u l\u00e0 0,5 atm v\u00e0 \u0111\u01b0\u1ee3c b\u1ea3o v\u1ec7 ch\u1ed1ng n\u1ed5 b\u1eb1ng van \u00e1p l\u1ef1c (\u0111\u1ed1i v\u1edbi MBA c\u00f3 c\u00f4ng su\u1ea5t \u2264 1600kVA) ho\u1eb7c r\u00f4 le \u00e1p l\u1ef1c (\u0111\u1ed1i v\u1edbi MBA c\u00f3 c\u00f4ng su\u1ea5t > 1600kVA, c\u00f3 m\u00e1y c\u1eaft ph\u00eda s\u01a1 c\u1ea5p). \u0110\u1ed1i v\u1edbi c\u00e1c MBA l\u1edbn, c\u00f3 th\u1ec3 ch\u1ebf t\u1ea1o ch\u0103n t\u1ea3n nhi\u1ec7t r\u1eddi, k\u1ebft n\u1ed1i v\u1edbi th\u00e2n m\u00e1y bi\u1ebfn \u00e1p qua m\u1eb7t b\u00edch v\u00e0 c\u00f3 th\u1ec3 th\u00e1o r\u1eddi khi v\u1eadn chuy\u1ec3n.<\/p>\n

        5.3. \u0110i\u1ec3m ti\u1ebfp \u0111\u1ecba v\u00e0 b\u1ea3o tr\u00ec<\/strong><\/h5>\n

        M\u1ed7i MBA ph\u1ea3i c\u00f3 \u00edt nh\u1ea5t hai \u0111i\u1ec3m ti\u1ebfp \u0111\u1ecba \u0111\u01b0\u1ee3c b\u1ed1 tr\u00ed \u1edf ph\u1ea7n d\u01b0\u1edbi c\u1ee7a th\u00e2n m\u00e1y, \u0111\u1ed1i x\u1ee9ng hai ph\u00eda. C\u00e1c \u0111i\u1ec3m ti\u1ebfp \u0111\u1ecba n\u00e0y ph\u1ea3i d\u1ec5 d\u00e0ng ti\u1ebfp c\u1eadn \u0111\u1ec3 ki\u1ec3m tra v\u00e0 b\u1ea3o tr\u00ec m\u00e0 kh\u00f4ng c\u1ea7n ph\u1ea3i c\u1eaft \u0111i\u1ec7n. Ti\u1ebfp \u0111\u1ecba ph\u1ea3i \u0111\u01b0\u1ee3c b\u1eaft b\u1eb1ng bu l\u00f4ng c\u00f3 ren, k\u00edch th\u01b0\u1edbc kh\u00f4ng nh\u1ecf h\u01a1n M12.<\/p>\n

        5.4. B\u00ecnh d\u1ea7u ph\u1ee5 v\u00e0 c\u01a1 c\u1ea5u gi\u00e3n n\u1edf<\/strong><\/h5>\n

        B\u00ecnh d\u1ea7u ph\u1ee5 ho\u1eb7c c\u01a1 c\u1ea5u ch\u1ee9a d\u1ea7u gi\u00e3n n\u1edf ph\u1ea3i \u0111\u01b0\u1ee3c n\u1ed1i th\u00f4ng v\u1edbi th\u00f9ng m\u00e1y bi\u1ebfn \u00e1p. Trong d\u1ea3i nhi\u1ec7t \u0111\u1ed9 d\u1ea7u t\u1eeb 5\u00b0C \u0111\u1ebfn 105\u00b0C, dung t\u00edch c\u1ee7a th\u00f9ng d\u1ea7u ph\u1ee5 v\u00e0 c\u01a1 c\u1ea5u gi\u00e3n n\u1edf ph\u1ea3i \u0111\u1ea3m b\u1ea3o d\u1ea7u trong b\u00ecnh kh\u00f4ng b\u1ecb tr\u00e0n ra ngo\u00e0i v\u00e0 kh\u00f4ng th\u1ea5p h\u01a1n \u0111\u00e1y b\u00ecnh d\u1ea7u ph\u1ee5. \u0110\u00e1y b\u00ecnh d\u1ea7u ph\u1ee5 c\u1ea7n c\u00f3 \u0111\u1ed9 cao t\u01b0\u01a1ng \u0111\u01b0\u01a1ng v\u1edbi \u0111\u1ea7u s\u1ee9 xuy\u00ean trung \u00e1p.<\/p>\n

        5.5. Y\u00eau c\u1ea7u \u0111\u1ed1i v\u1edbi m\u00e1y bi\u1ebfn \u00e1p ki\u1ec3u k\u00edn<\/strong><\/h5>\n

        \u0110\u1ed1i v\u1edbi m\u00e1y bi\u1ebfn \u00e1p ki\u1ec3u k\u00edn, v\u1ecf m\u00e1y c\u1ea7n c\u00f3 kh\u1ea3 n\u0103ng co gi\u00e3n \u0111\u1ec3 trong d\u1ea3i nhi\u1ec7t \u0111\u1ed9 l\u00e0m vi\u1ec7c (t\u1eeb 5\u00b0C \u0111\u1ebfn 105\u00b0C) v\u00e0 ch\u1ecbu t\u00e1c \u0111\u1ed9ng t\u1eeb c\u00e1c thao t\u00e1c b\u00ecnh th\u01b0\u1eddng (b\u1ed1c d\u1ee1, v\u1eadn chuy\u1ec3n, v.v.). M\u1ee9c d\u1ea7u trong m\u00e1y (ki\u1ec3m tra qua \u1ed1ng ki\u1ec3m tra m\u1ee9c d\u1ea7u) ph\u1ea3i lu\u00f4n n\u1eb1m trong gi\u1edbi h\u1ea1n cho ph\u00e9p.<\/p>\n

        5.6. X\u1eed l\u00fd b\u1ec1 m\u1eb7t v\u00e0 b\u1ea3o v\u1ec7 ch\u1ed1ng \u0103n m\u00f2n<\/strong><\/h5>\n

        Th\u00f9ng ch\u1ee9a m\u00e1y bi\u1ebfn \u00e1p v\u00e0 c\u00e1c ph\u1ee5 t\u00f9ng c\u1ea7n \u0111\u01b0\u1ee3c b\u1ea3o v\u1ec7 ch\u1ed1ng g\u1ec9, ch\u1ed1ng \u0103n m\u00f2n b\u1eb1ng c\u00f4ng ngh\u1ec7 s\u01a1n t\u0129nh \u0111i\u1ec7n ho\u1eb7c m\u1ea1 k\u1ebdm nh\u00fang n\u00f3ng. \u0110\u1ed9 d\u00e0y t\u1ed1i thi\u1ec3u l\u1edbp ph\u1ee7 s\u01a1n l\u00e0 80 \u00b5m. M\u00e0u s\u1eafc c\u1ee7a l\u1edbp s\u01a1n b\u00ean ngo\u00e0i ph\u1ea3i \u0111\u1ea3m b\u1ea3o kh\u1ea3 n\u0103ng t\u1ea3n nhi\u1ec7t c\u1ee7a m\u00e1y bi\u1ebfn \u00e1p, \u0111\u1ed3ng th\u1eddi tr\u00e1nh h\u1ea5p th\u1ee5 qu\u00e1 nhi\u1ec1u nhi\u1ec7t t\u1eeb \u00e1nh s\u00e1ng m\u1eb7t tr\u1eddi.<\/p>\n

        5.7. Ti\u00eau chu\u1ea9n k\u1ef9 thu\u1eadt gio\u0103ng m\u00e1y bi\u1ebfn \u00e1p<\/strong><\/h5>\n

        C\u00e1c gio\u0103ng c\u1ee7a MBA ph\u1ea3i l\u00e0 lo\u1ea1i ch\u1ecbu d\u1ea7u v\u00e0 c\u00f3 kh\u1ea3 n\u0103ng ch\u1ecbu \u0111\u01b0\u1ee3c t\u00e1c \u0111\u1ed9ng c\u1ee7a m\u00f4i tr\u01b0\u1eddng ngo\u00e0i tr\u1eddi. Ti\u00eau chu\u1ea9n k\u1ef9 thu\u1eadt c\u1ee7a gio\u0103ng bao g\u1ed3m:<\/p>\n

          \n
        • \n

          \u0110\u1ed9 tr\u01b0\u01a1ng n\u1edf trong d\u1ea7u<\/strong>: Kh\u00f4ng qu\u00e1 2% sau 96 gi\u1edd th\u1eed nghi\u1ec7m \u1edf 80\u00b0C (theo TCVN 2752:2008).<\/p>\n<\/li>\n

        • \n

          \u0110\u1ed9 gi\u00e3n d\u00e0i khi k\u00e9o \u0111\u1ee9t<\/strong>: \u2265 350% (theo TCVN 4509:2013).<\/p>\n<\/li>\n

        • \n

          H\u1ec7 s\u1ed1 l\u00e3o h\u00f3a<\/strong>: Trong d\u1ea7u bi\u1ebfn \u00e1p v\u00e0 trong kh\u00f4ng kh\u00ed, sau 96 gi\u1edd \u1edf 80\u00b0C ph\u1ea3i \u0111\u1ea1t \u2265 85% v\u00e0 \u2265 90% t\u01b0\u01a1ng \u1ee9ng (theo TCVN 2229:2007).<\/p>\n<\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"

          PH\u1ea6N I: QUY \u0110\u1ecaNH CHUNG 1. \u0110i\u1ec1u 1: Ph\u1ea1m vi \u0111i\u1ec1u ch\u1ec9nh v\u00e0 \u0111\u1ed1i t\u01b0\u1ee3ng \u00e1p d\u1ee5ng 1.1. Ph\u1ea1m vi \u0111i\u1ec1u ch\u1ec9nh: Ti\u00eau chu\u1ea9n n\u00e0y quy \u0111\u1ecbnh v\u1ec1 l\u1ef1a ch\u1ecdn m\u00e1y bi\u1ebfn \u00e1p ph\u00e2n ph\u1ed1i, t\u1ef1 d\u00f9ng, ng\u00e2m trong d\u1ea7u, \u0111i\u1ec7n \u00e1p 35kV trong T\u1eadp \u0111o\u00e0n \u0110i\u1ec7n l\u1ef1c Qu\u1ed1c gia Vi\u1ec7t Nam (EVN). 1.2. \u0110\u1ed1i […]<\/p>\n","protected":false},"author":1,"featured_media":1595,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[312],"tags":[334,335,333],"yoast_head":"\nTi\u00eau chu\u1ea9n k\u1ef9 thu\u1eadt m\u00e1y bi\u1ebfn \u00e1p ph\u00e2n ph\u1ed1i theo quy\u1ebft \u0111\u1ecbnh 62-EVN - C\u00d4NG TY TNHH C\u01a0 \u0110I\u1ec6N MI\u1ec0N B\u1eaeC. 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