{"id":14693,"date":"2025-03-25T19:29:04","date_gmt":"2025-03-25T11:29:04","guid":{"rendered":"https:\/\/viox.com\/?p=14693"},"modified":"2025-03-25T19:36:27","modified_gmt":"2025-03-25T11:36:27","slug":"molded-case-circuit-breakers-and-surge-protective-devices-a-comparative-analysis","status":"publish","type":"post","link":"https:\/\/test.viox.com\/vi\/molded-case-circuit-breakers-and-surge-protective-devices-a-comparative-analysis\/","title":{"rendered":"Thi\u1ebft b\u1ecb ng\u1eaft m\u1ea1ch d\u1ea1ng h\u1ed9p \u0111\u00fac so v\u1edbi thi\u1ebft b\u1ecb b\u1ea3o v\u1ec7 ch\u1ed1ng s\u00e9t lan truy\u1ec1n"},"content":{"rendered":"
\n

Gi\u1edbi thi\u1ec7u: T\u00ecm hi\u1ec3u v\u1ec1 h\u1ec7 th\u1ed1ng b\u1ea3o v\u1ec7 \u0111i\u1ec7n<\/h2>\n

Khi n\u00f3i \u0111\u1ebfn vi\u1ec7c b\u1ea3o v\u1ec7 h\u1ec7 th\u1ed1ng \u0111i\u1ec7n, hai th\u00e0nh ph\u1ea7n quan tr\u1ecdng th\u01b0\u1eddng \u0111\u01b0\u1ee3c th\u1ea3o lu\u1eadn l\u00e0: Aptomat v\u1ecf \u0111\u00fac (MCCB)<\/strong> v\u00e0 Thi\u1ebft b\u1ecb ch\u1ed1ng s\u00e9t lan truy\u1ec1n (SPD)<\/strong>. M\u1eb7c d\u00f9 c\u1ea3 hai \u0111\u1ec1u ph\u1ee5c v\u1ee5 c\u00e1c ch\u1ee9c n\u0103ng b\u1ea3o v\u1ec7, nh\u01b0ng ch\u00fang gi\u1ea3i quy\u1ebft c\u00e1c m\u1ed1i \u0111e d\u1ecda kh\u00e1c nhau \u0111\u1ed1i v\u1edbi h\u1ec7 th\u1ed1ng \u0111i\u1ec7n c\u1ee7a b\u1ea1n v\u00e0 ho\u1ea1t \u0111\u1ed9ng theo nh\u1eefng c\u00e1ch kh\u00e1c nhau v\u1ec1 c\u01a1 b\u1ea3n. H\u01b0\u1edbng d\u1eabn to\u00e0n di\u1ec7n n\u00e0y kh\u00e1m ph\u00e1 s\u1ef1 kh\u00e1c bi\u1ec7t, \u1ee9ng d\u1ee5ng v\u00e0 vai tr\u00f2 b\u1ed5 sung c\u1ee7a MCCB v\u00e0 SPD \u0111\u1ec3 gi\u00fap b\u1ea1n \u0111\u01b0a ra quy\u1ebft \u0111\u1ecbnh s\u00e1ng su\u1ed1t v\u1ec1 chi\u1ebfn l\u01b0\u1ee3c b\u1ea3o v\u1ec7 \u0111i\u1ec7n c\u1ee7a m\u00ecnh.<\/p>\n

Aptomat kh\u1ed1i (MCCB) l\u00e0 g\u00ec?<\/h2>\n

Aptomat kh\u1ed1i l\u00e0 m\u1ed9t thi\u1ebft b\u1ecb b\u1ea3o v\u1ec7 \u0111i\u1ec7n \u0111\u01b0\u1ee3c \u0111\u1eb7t trong v\u1ecf v\u1eadt li\u1ec7u c\u00e1ch \u0111i\u1ec7n \u0111\u00fac khu\u00f4n, \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf \u0111\u1ec3 b\u1ea3o v\u1ec7 qu\u00e1 d\u00f2ng v\u00e0 ng\u1eafn m\u1ea1ch cho c\u00e1c m\u1ea1ch \u0111i\u1ec7n. MCCB \u0111\u1ea1i di\u1ec7n cho m\u1ed9t s\u1ef1 ph\u00e1t tri\u1ec3n t\u1eeb c\u00e1c b\u1ed9 ng\u1eaft m\u1ea1ch truy\u1ec1n th\u1ed1ng v\u1edbi c\u00e1c t\u00ednh n\u0103ng v\u00e0 kh\u1ea3 n\u0103ng n\u00e2ng cao.<\/p>\n

\"\"<\/p>\n

C\u00e1c t\u00ednh n\u0103ng ch\u00ednh c\u1ee7a MCCB<\/h3>\n
    \n
  • K\u1ebft c\u1ea5u ch\u1eafc ch\u1eafn<\/strong>: \u0110\u01b0\u1ee3c bao b\u1ecdc trong v\u1ecf nh\u1ef1a nhi\u1ec7t d\u1ebbo c\u00e1ch \u0111i\u1ec7n b\u1ec1n, b\u1ea3o v\u1ec7 ch\u1ed1ng l\u1ea1i c\u00e1c y\u1ebfu t\u1ed1 m\u00f4i tr\u01b0\u1eddng v\u00e0 h\u01b0 h\u1ecfng v\u1eadt l\u00fd<\/li>\n
  • C\u00e0i \u0111\u1eb7t chuy\u1ebfn \u0111i c\u00f3 th\u1ec3 \u0111i\u1ec1u ch\u1ec9nh<\/strong>: Nhi\u1ec1u MCCB cung c\u1ea5p ng\u01b0\u1ee1ng ng\u1eaft c\u00f3 th\u1ec3 \u0111i\u1ec1u ch\u1ec9nh \u0111\u1ec3 t\u00f9y ch\u1ec9nh m\u1ee9c b\u1ea3o v\u1ec7<\/li>\n
  • \u0110\u1ecbnh m\u1ee9c Ampe<\/strong>: Th\u01b0\u1eddng c\u00f3 s\u1eb5n trong ph\u1ea1m vi t\u1eeb 15A \u0111\u1ebfn 2500A<\/li>\n
  • X\u1ebfp h\u1ea1ng \u0111i\u1ec7n \u00e1p<\/strong>: C\u00f3 s\u1eb5n cho c\u00e1c \u1ee9ng d\u1ee5ng \u0111i\u1ec7n \u00e1p th\u1ea5p v\u00e0 trung b\u00ecnh (l\u00ean \u0111\u1ebfn 1000V AC)<\/li>\n
  • Kh\u1ea3 n\u0103ng ng\u1eaft<\/strong>: Kh\u1ea3 n\u0103ng ng\u1eaft an to\u00e0n d\u00f2ng \u0111i\u1ec7n s\u1ef1 c\u1ed1 t\u1eeb 10kA \u0111\u1ebfn 200kA<\/li>\n<\/ul>\n

    MCCB ho\u1ea1t \u0111\u1ed9ng nh\u01b0 th\u1ebf n\u00e0o<\/h3>\n

    MCCB ho\u1ea1t \u0111\u1ed9ng tr\u00ean hai c\u01a1 ch\u1ebf b\u1ea3o v\u1ec7 ch\u00ednh:<\/p>\n

      \n
    1. B\u1ea3o v\u1ec7 nhi\u1ec7t<\/strong>: S\u1eed d\u1ee5ng m\u1ed9t d\u1ea3i l\u01b0\u1ee1ng kim u\u1ed1n cong khi b\u1ecb \u0111\u1ed1t n\u00f3ng b\u1edfi c\u00e1c \u0111i\u1ec1u ki\u1ec7n qu\u00e1 d\u00f2ng li\u00ean t\u1ee5c, k\u00edch ho\u1ea1t b\u1ed9 ng\u1eaft m\u1ea1ch \u0111\u1ec3 ng\u1eaft sau m\u1ed9t kho\u1ea3ng th\u1eddi gian tr\u1ec5 (\u0111\u1eb7c t\u00ednh th\u1eddi gian ngh\u1ecbch \u0111\u1ea3o)<\/li>\n
    2. B\u1ea3o v\u1ec7 t\u1eeb t\u00ednh<\/strong>: S\u1eed d\u1ee5ng c\u01a1 ch\u1ebf \u0111i\u1ec7n t\u1eeb ph\u1ea3n \u1ee9ng t\u1ee9c th\u1eddi v\u1edbi d\u00f2ng \u0111i\u1ec7n ng\u1eafn m\u1ea1ch c\u01b0\u1eddng \u0111\u1ed9 cao<\/li>\n<\/ol>\n

      Khi m\u1ed9t trong hai \u0111i\u1ec1u ki\u1ec7n v\u01b0\u1ee3t qu\u00e1 ng\u01b0\u1ee1ng \u0111\u1eb7t tr\u01b0\u1edbc, MCCB s\u1ebd ng\u1eaft m\u1ea1ch, ng\u1eaft d\u00f2ng \u0111i\u1ec7n \u0111\u1ec3 ng\u0103n ng\u1eeba h\u01b0 h\u1ecfng, h\u1ecfa ho\u1ea1n ho\u1eb7c c\u00e1c nguy c\u01a1 kh\u00e1c.<\/p>\n

      Thi\u1ebft b\u1ecb ch\u1ed1ng s\u00e9t lan truy\u1ec1n (SPD) l\u00e0 g\u00ec?<\/h2>\n

      Thi\u1ebft b\u1ecb ch\u1ed1ng s\u00e9t lan truy\u1ec1n, c\u00f2n \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 b\u1ed9 tri\u1ec7t ti\u00eau xung \u0111i\u1ec7n ho\u1eb7c b\u1ed9 tri\u1ec7t ti\u00eau xung \u0111i\u1ec7n \u00e1p tho\u00e1ng qua (TVSS), \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf \u0111\u1eb7c bi\u1ec7t \u0111\u1ec3 b\u1ea3o v\u1ec7 h\u1ec7 th\u1ed1ng v\u00e0 thi\u1ebft b\u1ecb \u0111i\u1ec7n kh\u1ecfi c\u00e1c gai ho\u1eb7c xung \u0111i\u1ec7n \u00e1p. C\u00e1c s\u1ef1 ki\u1ec7n qu\u00e1 \u0111i\u1ec7n \u00e1p t\u1ee9c th\u1eddi n\u00e0y th\u01b0\u1eddng k\u00e9o d\u00e0i trong micro gi\u00e2y nh\u01b0ng c\u00f3 th\u1ec3 g\u00e2y ra thi\u1ec7t h\u1ea1i \u0111\u00e1ng k\u1ec3.<\/p>\n

      \"\"<\/p>\n

      C\u00e1c t\u00ednh n\u0103ng ch\u00ednh c\u1ee7a SPD<\/h3>\n
        \n
      • Ph\u1ea3n \u1ee8ng Th\u1eddi Gian<\/strong>: Ph\u1ea3n \u1ee9ng trong v\u00f2ng nano gi\u00e2y \u0111\u1ed1i v\u1edbi c\u00e1c xung \u0111i\u1ec7n \u00e1p<\/li>\n
      • H\u1ea5p th\u1ee5 n\u0103ng l\u01b0\u1ee3ng<\/strong>: \u0110\u01b0\u1ee3c \u0111\u00e1nh gi\u00e1 theo kh\u1ea3 n\u0103ng h\u1ea5p th\u1ee5 n\u0103ng l\u01b0\u1ee3ng xung (t\u00ednh b\u1eb1ng joules ho\u1eb7c kA)<\/li>\n
      • \u0110i\u1ec7n \u00e1p k\u1eb9p<\/strong>: M\u1ee9c \u0111i\u1ec7n \u00e1p m\u00e0 SPD k\u00edch ho\u1ea1t<\/li>\n
      • Ch\u1ebf \u0111\u1ed9 b\u1ea3o v\u1ec7<\/strong>: C\u00f3 th\u1ec3 b\u1ea3o v\u1ec7 c\u00e1c \u0111\u01b0\u1eddng d\u1eabn d\u00e2y n\u00f3ng-d\u00e2y n\u00f3ng, d\u00e2y n\u00f3ng-d\u00e2y trung t\u00ednh, d\u00e2y n\u00f3ng-d\u00e2y \u0111\u1ea5t v\u00e0 d\u00e2y trung t\u00ednh-d\u00e2y \u0111\u1ea5t<\/li>\n
      • C\u00e1c lo\u1ea1i SPD<\/strong>: \u0110\u01b0\u1ee3c ph\u00e2n lo\u1ea1i l\u00e0 Lo\u1ea1i 1 (\u0111\u01b0\u1ee3c l\u1eafp \u0111\u1eb7t t\u1ea1i \u0111\u1ea7u v\u00e0o d\u1ecbch v\u1ee5), Lo\u1ea1i 2 (h\u1ea1 l\u01b0u c\u1ee7a d\u1ecbch v\u1ee5 ch\u00ednh) ho\u1eb7c Lo\u1ea1i 3 (\u0111i\u1ec3m s\u1eed d\u1ee5ng)<\/li>\n<\/ul>\n

        SPD ho\u1ea1t \u0111\u1ed9ng nh\u01b0 th\u1ebf n\u00e0o<\/h3>\n

        Kh\u00f4ng gi\u1ed1ng nh\u01b0 MCCB ng\u1eaft m\u1ea1ch v\u1eadt l\u00fd, SPD ho\u1ea1t \u0111\u1ed9ng b\u1eb1ng c\u00e1ch:<\/p>\n

          \n
        1. Chuy\u1ec3n h\u01b0\u1edbng \u0111i\u1ec7n \u00e1p d\u01b0 th\u1eeba<\/strong>: Chuy\u1ec3n h\u01b0\u1edbng d\u00f2ng \u0111i\u1ec7n xung xu\u1ed1ng \u0111\u1ea5t khi \u0111i\u1ec7n \u00e1p v\u01b0\u1ee3t qu\u00e1 m\u1ee9c b\u00ecnh th\u01b0\u1eddng<\/li>\n
        2. K\u1eb9p \u0111i\u1ec7n \u00e1p<\/strong>: Gi\u1edbi h\u1ea1n \u0111i\u1ec7n \u00e1p \u1edf m\u1ee9c an to\u00e0n trong s\u1ef1 ki\u1ec7n xung \u0111i\u1ec7n \u00e1p<\/li>\n
        3. H\u1ea5p th\u1ee5 n\u0103ng l\u01b0\u1ee3ng<\/strong>: S\u1eed d\u1ee5ng c\u00e1c th\u00e0nh ph\u1ea7n nh\u01b0 varistor oxit kim lo\u1ea1i (MOV), \u0111i\u1ed1t tuy\u1ebft l\u1edf silicon ho\u1eb7c \u1ed1ng ph\u00f3ng \u0111i\u1ec7n \u0111\u1ec3 h\u1ea5p th\u1ee5 n\u0103ng l\u01b0\u1ee3ng xung<\/li>\n<\/ol>\n

          SPD c\u00f3 th\u1ec3 x\u1eed l\u00fd nhi\u1ec1u s\u1ef1 ki\u1ec7n xung \u0111i\u1ec7n \u00e1p nh\u01b0ng c\u00f3 tu\u1ed5i th\u1ecd h\u1eefu h\u1ea1n d\u1ef1a tr\u00ean s\u1ed1 l\u01b0\u1ee3ng v\u00e0 c\u01b0\u1eddng \u0111\u1ed9 c\u1ee7a c\u00e1c xung \u0111i\u1ec7n \u00e1p m\u00e0 ch\u00fang g\u1eb7p ph\u1ea3i.<\/p>\n

          MCCB so v\u1edbi SPD: S\u1ef1 kh\u00e1c bi\u1ec7t quan tr\u1ecdng<\/h2>\n\n\n\n\n\n\n\n\n\n\n\n
          N\u0103ng<\/th>\nB\u1ed9 ng\u1eaft m\u1ea1ch v\u1ecf \u0111\u00fac (MCCB)<\/th>\nThi\u1ebft b\u1ecb ch\u1ed1ng s\u00e9t lan truy\u1ec1n (SPD)<\/th>\n<\/tr>\n
          Ch\u1ee9c n\u0103ng ch\u00ednh<\/strong><\/td>\nB\u1ea3o v\u1ec7 ch\u1ed1ng qu\u00e1 d\u00f2ng v\u00e0 ng\u1eafn m\u1ea1ch<\/td>\nB\u1ea3o v\u1ec7 ch\u1ed1ng l\u1ea1i c\u00e1c xung \u0111i\u1ec7n \u00e1p tho\u00e1ng qua<\/td>\n<\/tr>\n
          Ph\u01b0\u01a1ng ph\u00e1p ho\u1ea1t \u0111\u1ed9ng<\/strong><\/td>\nNg\u1eaft m\u1ea1ch v\u1eadt l\u00fd<\/td>\nChuy\u1ec3n h\u01b0\u1edbng ho\u1eb7c h\u1ea5p th\u1ee5 \u0111i\u1ec7n \u00e1p d\u01b0 th\u1eeba<\/td>\n<\/tr>\n
          Ph\u1ea3n \u1ee8ng Th\u1eddi Gian<\/strong><\/td>\nMili gi\u00e2y \u0111\u1ebfn gi\u00e2y (t\u00f9y thu\u1ed9c v\u00e0o c\u01b0\u1eddng \u0111\u1ed9 l\u1ed7i)<\/td>\nNano gi\u00e2y<\/td>\n<\/tr>\n
          Th\u1eddi gian c\u1ee7a s\u1ef1 ki\u1ec7n<\/strong><\/td>\nPh\u1ea3n \u1ee9ng v\u1edbi c\u00e1c v\u1ea5n \u0111\u1ec1 k\u00e9o d\u00e0i<\/td>\nPh\u1ea3n \u1ee9ng v\u1edbi c\u00e1c s\u1ef1 ki\u1ec7n t\u1ee9c th\u1eddi<\/td>\n<\/tr>\n
          Kh\u1ea3 n\u0103ng thi\u1ebft l\u1eadp l\u1ea1i<\/strong><\/td>\nC\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c \u0111\u1eb7t l\u1ea1i th\u1ee7 c\u00f4ng sau khi ng\u1eaft<\/td>\nT\u1ef1 \u0111\u1ed9ng \u0111\u1eb7t l\u1ea1i (cho \u0111\u1ebfn khi th\u00e0nh ph\u1ea7n xu\u1ed1ng c\u1ea5p)<\/td>\n<\/tr>\n
          Y\u1ebfu t\u1ed1 tu\u1ed5i th\u1ecd<\/strong><\/td>\nS\u1ed1 l\u01b0\u1ee3ng ho\u1ea1t \u0111\u1ed9ng ng\u1eaft<\/td>\nN\u0103ng l\u01b0\u1ee3ng xung t\u00edch l\u0169y \u0111\u01b0\u1ee3c h\u1ea5p th\u1ee5<\/td>\n<\/tr>\n
          V\u1ecb tr\u00ed l\u1eafp \u0111\u1eb7t<\/strong><\/td>\nTrong b\u1ea3ng ph\u00e2n ph\u1ed1i v\u00e0 nh\u01b0 ng\u1eaft k\u1ebft n\u1ed1i<\/td>\nT\u1ea1i \u0111\u1ea7u v\u00e0o d\u1ecbch v\u1ee5, b\u1ea3ng nh\u00e1nh ho\u1eb7c thi\u1ebft b\u1ecb<\/td>\n<\/tr>\n
          Y\u00eau C\u1ea7u B\u1ea3o Tr\u00ec<\/strong><\/td>\nKi\u1ec3m tra \u0111\u1ecbnh k\u1ef3 ch\u1ee9c n\u0103ng ng\u1eaft<\/td>\nGi\u00e1m s\u00e1t c\u00e1c ch\u1ec9 b\u00e1o k\u1ebft th\u00fac v\u00f2ng \u0111\u1eddi<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

          T\u1ea1i sao b\u1ea1n c\u1ea7n c\u1ea3 MCCB v\u00e0 SPD<\/h2>\n

          M\u1eb7c d\u00f9 MCCB v\u00e0 SPD ph\u1ee5c v\u1ee5 c\u00e1c ch\u1ee9c n\u0103ng b\u1ea3o v\u1ec7 kh\u00e1c nhau, nh\u01b0ng ch\u00fang b\u1ed5 sung cho nhau \u0111\u1ec3 cung c\u1ea5p kh\u1ea3 n\u0103ng b\u1ea3o v\u1ec7 h\u1ec7 th\u1ed1ng \u0111i\u1ec7n to\u00e0n di\u1ec7n:<\/p>\n

          C\u00e1c t\u00ecnh hu\u1ed1ng c\u1ea7n thi\u1ebft MCCB<\/h3>\n
            \n
          1. \u0110i\u1ec1u ki\u1ec7n qu\u00e1 t\u1ea3i li\u00ean t\u1ee5c<\/strong>: Khi m\u1ed9t m\u1ea1ch li\u00ean t\u1ee5c h\u00fat nhi\u1ec1u d\u00f2ng \u0111i\u1ec7n h\u01a1n c\u00f4ng su\u1ea5t \u0111\u1ecbnh m\u1ee9c c\u1ee7a n\u00f3<\/li>\n
          2. Ng\u1eafn m\u1ea1ch thi\u1ebft b\u1ecb<\/strong>: Trong qu\u00e1 tr\u00ecnh h\u1ecfng h\u00f3c thi\u1ebft b\u1ecb b\u00ean trong g\u00e2y ra l\u1ed7i tr\u1ef1c ti\u1ebfp t\u1eeb pha sang pha ho\u1eb7c t\u1eeb pha xu\u1ed1ng \u0111\u1ea5t<\/li>\n
          3. L\u1ed7i ch\u1ea1m \u0111\u1ea5t<\/strong>: Khi d\u00f2ng \u0111i\u1ec7n v\u00f4 t\u00ecnh truy\u1ec1n xu\u1ed1ng \u0111\u1ea5t<\/li>\n
          4. C\u00e1ch ly m\u1ea1ch<\/strong>: Khi b\u1ea3o tr\u00ec y\u00eau c\u1ea7u ng\u1eaft ngu\u1ed3n \u0111i\u1ec7n an to\u00e0n<\/li>\n<\/ol>\n

            C\u00e1c T\u00ecnh Hu\u1ed1ng M\u00e0 SPD L\u00e0 Thi\u1ebft Y\u1ebfu<\/h3>\n
              \n
            1. S\u00e9t \u0111\u00e1nh<\/strong>: S\u00e9t \u0111\u00e1nh tr\u1ef1c ti\u1ebfp ho\u1eb7c gi\u00e1n ti\u1ebfp g\u00e2y ra \u0111\u1ed9t bi\u1ebfn \u0111i\u1ec7n \u00e1p l\u1edbn<\/li>\n
            2. Chuy\u1ec3n M\u1ea1ch L\u01b0\u1edbi \u0110i\u1ec7n<\/strong>: Khi c\u00e1c c\u00f4ng ty \u0111i\u1ec7n l\u1ef1c chuy\u1ec3n \u0111\u1ed5i \u0111\u01b0\u1eddng d\u00e2y truy\u1ec1n t\u1ea3i<\/li>\n
            3. Chuy\u1ec3n M\u1ea1ch T\u1ea3i B\u00ean Trong<\/strong>: Qu\u00e1 \u00e1p t\u1eeb vi\u1ec7c kh\u1edfi \u0111\u1ed9ng\/d\u1eebng c\u00e1c \u0111\u1ed9ng c\u01a1 ho\u1eb7c thi\u1ebft b\u1ecb l\u1edbn trong m\u1ed9t c\u01a1 s\u1edf<\/li>\n
            4. Ph\u00f3ng T\u0129nh \u0110i\u1ec7n<\/strong>: T\u1eeb c\u00e1c \u0111i\u1ec1u ki\u1ec7n m\u00f4i tr\u01b0\u1eddng ho\u1eb7c ho\u1ea1t \u0111\u1ed9ng c\u1ee7a thi\u1ebft b\u1ecb<\/li>\n<\/ol>\n

              Chi\u1ebfn L\u01b0\u1ee3c B\u1ea3o V\u1ec7 T\u00edch H\u1ee3p: S\u1eed D\u1ee5ng MCCB v\u00e0 SPD C\u00f9ng Nhau<\/h2>\n

              M\u1ed9t chi\u1ebfn l\u01b0\u1ee3c b\u1ea3o v\u1ec7 \u0111i\u1ec7n to\u00e0n di\u1ec7n k\u1ebft h\u1ee3p c\u1ea3 MCCB v\u00e0 SPD m\u1ed9t c\u00e1ch ph\u1ed1i h\u1ee3p:<\/p>\n

              Ph\u01b0\u01a1ng Ph\u00e1p B\u1ea3o V\u1ec7 Theo L\u1edbp<\/h3>\n
                \n
              1. B\u1ea3o V\u1ec7 \u0110\u1ea7u Ngu\u1ed3n<\/strong>:\n