{"id":4527,"date":"2026-10-11T06:12:48","date_gmt":"2026-10-11T06:12:48","guid":{"rendered":"https:\/\/huyuglobal.com\/?p=4527"},"modified":"2026-10-11T06:16:56","modified_gmt":"2026-10-11T06:16:56","slug":"alternating-current-contactor-guidelines","status":"publish","type":"post","link":"https:\/\/huyuglobal.com\/vi\/blog\/alternating-current-contactor-guidelines\/","title":{"rendered":"H\u01b0\u1edbng d\u1eabn v\u1ec1 Contactor D\u00f2ng \u0111i\u1ec7n Xoay chi\u1ec1u"},"content":{"rendered":"

M\u1ed9t trong nh\u1eefng b\u1ed9 ph\u1eadn ch\u00ednh c\u1ee7a \u0111i\u1ec1u khi\u1ec3n \u0111\u1ed9ng c\u01a1 c\u00f3 th\u1ec3 d\u1ec5 d\u00e0ng g\u1ecdi l\u00e0 contactor AC. Nh\u01b0ng c\u1ea7n l\u01b0u \u00fd r\u1eb1ng c\u1ea5u h\u00ecnh sai c\u1ee7a contactor c\u0169ng c\u00f3 th\u1ec3 l\u00e0 m\u1ed9t trong nh\u1eefng v\u1ea5n \u0111\u1ec1. V\u00ed d\u1ee5, nh\u1eefng Ampe m\u00e0 ng\u01b0\u1eddi ta c\u00f3 th\u1ec3 th\u1ea5y \u1edf b\u00ean c\u1ea1nh contactor cung c\u1ea5p th\u00f4ng tin v\u1ec1 \u0111\u1eb7c t\u00ednh lo\u1ea1i tr\u1edf kh\u00e1ng c\u1ee7a n\u00f3. Tuy nhi\u00ean, n\u1ebfu ng\u01b0\u1eddi ta chuy\u1ec3n \u0111\u1ed5i con s\u1ed1 \u0111\u00f3 \u0111\u1ec3 kh\u1edfi \u0111\u1ed9ng \u0111\u1ed9ng c\u01a1, c\u00f3 th\u1ec3 s\u1ebd xu\u1ea5t hi\u1ec7n c\u00e1c \u0111i\u1ec3m n\u00f3ng trong b\u1ea3ng \u0111i\u1ec1u khi\u1ec3n. Do \u0111\u00f3, b\u00e0i vi\u1ebft n\u00e0y gi\u1ea3i th\u00edch contactor AC l\u00e0 g\u00ec, cu\u1ed9n d\u00e2y m\u00e0 contactor AC s\u1edf h\u1eefu v\u00e0 \u0111i\u1ec3m kh\u00e1c bi\u1ec7t c\u1ee7a n\u00f3 so v\u1edbi contactor DC, lo\u1ea1i danh m\u1ee5c \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 x\u00e1c \u0111\u1ecbnh t\u1ea3i v\u00e0 c\u00e1ch th\u1ef1c hi\u1ec7n \u0111\u1ea5u d\u00e2y, lo\u1ea1i b\u1ea3o tr\u00ec c\u1ea7n thi\u1ebft v\u00e0 gi\u00e1 c\u1ea3 c\u1ee7a n\u00f3 s\u1ebd nh\u01b0 th\u1ebf n\u00e0o.<\/p>\n

T\u00f3m l\u1ea1i, contactor AC ho\u1ea1t \u0111\u1ed9ng nh\u01b0 m\u1ed9t c\u00f4ng t\u1eafc \u0111\u1ec3 \u0111i\u1ec1u khi\u1ec3n t\u1ea3i d\u00f2ng \u0111i\u1ec7n xoay chi\u1ec1u t\u1eeb xa. C\u00e1c \u0111\u1eb7c t\u00ednh ch\u00ednh ph\u1ee5 thu\u1ed9c v\u00e0o c\u00e1ch contactor ho\u1ea1t \u0111\u1ed9ng, kh\u00f4ng ph\u1ea3i v\u00e0o d\u00f2ng \u0111i\u1ec7n, v\u1ed1n ch\u1ec9 l\u00e0 m\u1ed9t trong c\u00e1c th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt. V\u00ed d\u1ee5, AC1 ch\u1ec9 ra s\u1eed d\u1ee5ng trong chu k\u1ef3 t\u1ea3i tr\u1edf kh\u00e1ng, AC3 ch\u1ec9 ra s\u1eed d\u1ee5ng \u0111\u1ec3 kh\u1edfi \u0111\u1ed9ng \u0111\u1ed9ng c\u01a1, v\u00e0 AC4 ch\u1ec9 ra s\u1eed d\u1ee5ng cho c\u00e1c \u1ee9ng d\u1ee5ng r\u1ea5t kh\u1eafc nghi\u1ec7t (v\u00ed d\u1ee5, \u0111\u1ea3o chi\u1ec1u, phanh \u0111i\u1ec7n, inching) v\u1edbi d\u00f2ng \u0111i\u1ec7n kho\u1ea3ng 40-60% th\u1ea5p h\u01a1n AC3. Contactor AC v\u00e0 DC l\u00e0 c\u00e1c lo\u1ea1i c\u00f4ng t\u1eafc kh\u00e1c nhau: contactor AC c\u00f3 l\u00f5i x\u1ebfp l\u1edbp, c\u00f4ng ngh\u1ec7 c\u1ef1c che cho ph\u00e9p contactor AC ng\u1eaft d\u00f2ng t\u1ea1i \u0111i\u1ec3m giao nhau b\u1eb1ng kh\u00f4ng, trong khi contactor DC kh\u00f4ng c\u00f3 l\u00f5i x\u1ebfp l\u1edbp v\u00e0 s\u1eed d\u1ee5ng th\u1ed5i t\u1eeb t\u00ednh. Gi\u00e1 contactor AC dao \u0111\u1ed9ng t\u1eeb 15 \u0111\u1ebfn 45 cho lo\u1ea1i 9-18 A v\u00e0 t\u1eeb 90 \u0111\u1ebfn 250 cho contactor c\u00f3 \u0111\u1ecbnh m\u1ee9c 50-95 A. C\u00f4ng ty HUYU s\u1ea3n xu\u1ea5t contactor d\u00f2ng EXC7 v\u1edbi d\u00f2ng \u0111i\u1ec7n t\u1eeb 9 A \u0111\u1ebfn 800 A.<\/p><\/blockquote>\n

Contactor AC th\u1ef1c s\u1ef1 l\u00e0m g\u00ec<\/h2>\n

Contactor v\u1ec1 c\u01a1 b\u1ea3n l\u00e0 m\u1ed9t c\u00f4ng t\u1eafc ho\u1ea1t \u0111\u1ed9ng \u0111i\u1ec7n t\u1eeb. Khi \u0111i\u1ec1u khi\u1ec3n \u0111\u01b0\u1ee3c b\u1eadt, m\u1ed9t d\u00f2ng \u0111i\u1ec7n \u0111i\u1ec1u khi\u1ec3n nh\u1ecf s\u1ebd k\u00edch ho\u1ea1t cu\u1ed9n d\u00e2y \u0111i\u1ec7n t\u1eeb, t\u1eeb \u0111\u00f3 k\u00e9o m\u1ed9t b\u1ed9 ph\u1eadn chuy\u1ec3n \u0111\u1ed9ng, \u0111\u00f3ng c\u00e1c ti\u1ebfp \u0111i\u1ec3m ch\u00ednh v\u00e0 cho ph\u00e9p d\u00f2ng \u0111i\u1ec7n ch\u1ea1y qua. T\u00edn hi\u1ec7u \u0111i\u1ec1u khi\u1ec3n b\u1ecb lo\u1ea1i b\u1ecf v\u00e0 l\u00f2 xo s\u1ebd m\u1edf c\u00e1c ti\u1ebfp \u0111i\u1ec3m m\u1ed9t l\u1ea7n n\u1eefa.<\/p>\n

S\u1ef1 \u0111\u01a1n gi\u1ea3n l\u00e0 \u0111i\u1ec3m m\u1ea5u ch\u1ed1t. N\u00f3 \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf cho ho\u1ea1t \u0111\u1ed9ng t\u1ea7n s\u1ed1 r\u1ea5t cao; th\u1ef1c t\u1ebf l\u00e0 h\u00e0ng tr\u0103m ngh\u00ecn chu k\u1ef3 b\u1eadt\/t\u1eaft trong su\u1ed1t v\u00f2ng \u0111\u1eddi, do \u0111\u00f3 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng r\u1ed9ng r\u00e3i trong c\u00e1c b\u1ed9 kh\u1edfi \u0111\u1ed9ng n\u00fat nh\u1ea5n, h\u1ec7 th\u1ed1ng HVAC, b\u01a1m v\u00e0 b\u1ea3ng \u0111\u00e8n chi\u1ebfu s\u00e1ng chung. N\u00f3 kh\u00f4ng \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf \u0111\u1ec3 ng\u1eaft khi c\u00f3 d\u00f2ng l\u1ed7i m\u00e0 thay v\u00e0o \u0111\u00f3 d\u1ef1a v\u00e0o r\u01a1 le ph\u00eda tr\u00ean \u0111\u1ec3 th\u1ef1c hi\u1ec7n ch\u1ee9c n\u0103ng \u0111\u00f3.<\/p>\n

\"Contactor<\/p>\n

C\u00e1ch ho\u1ea1t \u0111\u1ed9ng c\u1ee7a cu\u1ed9n d\u00e2y v\u00e0 l\u00f5i<\/h2>\n

Ho\u1ea1t \u0111\u1ed9ng c\u1ee7a contactor AC c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c gi\u1ea3i th\u00edch d\u1ef1a tr\u00ean ba \u0111\u1eb7c \u0111i\u1ec3m thi\u1ebft k\u1ebf.<\/p>\n

L\u00f5i gh\u00e9p. B\u1ea5t k\u1ef3 tr\u01b0\u1eddng \u0111i\u1ec7n xoay chi\u1ec1u n\u00e0o \u0111i qua b\u1ea5t k\u1ef3 v\u1eadt d\u1eabn r\u1eafn n\u00e0o c\u0169ng t\u1ea1o ra d\u00f2ng \u0111i\u1ec7n xo\u00e1y s\u1eb5n c\u00f3. N\u1ebfu l\u00f5i \u0111\u01b0\u1ee3c l\u00e0m b\u1eb1ng s\u1eaft \u0111\u1eb7c, n\u00f3 s\u1ebd n\u00f3ng l\u00ean. Do \u0111\u00f3, thi\u1ebft k\u1ebf c\u1ee7a contactor AC cho ph\u00e9p x\u1ebfp ch\u1ed3ng c\u00e1c l\u1edbp c\u00e1ch \u0111i\u1ec7n m\u1ecfng b\u1eb1ng th\u00e9p silic h\u00ecnh ch\u1eef E \u0111\u1ec3 ph\u00e1 v\u1ee1 \u0111\u01b0\u1eddng \u0111i c\u1ee7a d\u00f2ng \u0111i\u1ec7n tu\u1ea7n ho\u00e0n. \u0110\u00e2y l\u00e0 c\u00e2u tr\u1ea3 l\u1eddi cho c\u00e2u h\u1ecfi v\u1ec1 l\u00f5i \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng cho r\u01a1 le v\u00e0 contactor AC: th\u00e9p silic gh\u00e9p ch\u1ee9 kh\u00f4ng ph\u1ea3i s\u1eaft \u0111\u1eb7c.<\/p>\n

V\u00f2ng che ch\u1eafn ng\u0103n ch\u1eb7n hi\u1ec7n t\u01b0\u1ee3ng rung l\u1eafc. \u1ede t\u1ea7n s\u1ed1 50Hz, d\u00f2ng \u0111i\u1ec7n c\u1eaft qua \u0111\u01b0\u1eddng zero 100 l\u1ea7n m\u1ed7i gi\u00e2y, do \u0111\u00f3 t\u1ea1i m\u1ed7i l\u1ea7n c\u1eaft, l\u1ef1c h\u00fat t\u1eeb t\u00ednh bi\u1ebfn m\u1ea5t. N\u1ebfu kh\u00f4ng c\u00f3 bi\u1ec7n ph\u00e1p, b\u1ed9 ph\u1eadn armature s\u1ebd ch\u1ec9 ph\u00e1t ra ti\u1ebfng \u1ed3n v\u00e0 rung \u0111\u1ed9ng, d\u1eabn \u0111\u1ebfn m\u1ea5t ti\u1ebfp \u0111i\u1ec3m. Gi\u1ea3i ph\u00e1p l\u00e0 m\u1ed9t v\u00f2ng che ch\u1eafn b\u1eb1ng \u0111\u1ed3ng \u0111\u01b0\u1ee3c c\u1ed1 \u0111\u1ecbnh tr\u00ean m\u1eb7t c\u1ef1c. V\u00f2ng che ch\u1eafn t\u1ea1o ra \u0111\u1ed9 tr\u1ec5 th\u1eddi gian so v\u1edbi t\u1eeb th\u00f4ng trong ph\u1ea7n \u0111\u00f3, do \u0111\u00f3 duy tr\u00ec l\u1ef1c gi\u1eef xuy\u00ean su\u1ed1t c\u00e1c l\u1ea7n c\u1eaft qua zero. V\u00ec v\u1eady, khi m\u1ed9t contactor b\u1eaft \u0111\u1ea7u ph\u00e1t ra ti\u1ebfng \u1ed3n l\u1edbn, \u0111i\u1ec1u \u0111\u00f3 c\u00f3 ngh\u0129a l\u00e0 v\u00f2ng che ch\u1eafn b\u1ecb h\u1ecfng ho\u1eb7c m\u1ea5t do c\u00e1c l\u00fd do kh\u00e1c.<\/p>\n

Cu\u1ed9n d\u00e2y c\u00f3 \u0111i\u1ec7n tr\u1edf th\u1ea5p v\u00e0 s\u1ed1 v\u00f2ng th\u1ea5p. Cu\u1ed9n d\u00e2y AC gi\u1edbi h\u1ea1n d\u00f2ng \u0111i\u1ec7n b\u1eb1ng c\u00e1ch s\u1eed d\u1ee5ng kh\u00e1ng c\u1ea3m thay v\u00ec \u0111i\u1ec7n tr\u1edf v\u00e0 do \u0111\u00f3 c\u00f3 th\u1ec3 s\u1eed d\u1ee5ng d\u00e2y d\u1eabn d\u00e0y v\u00e0 s\u1ed1 v\u00f2ng t\u01b0\u01a1ng \u0111\u1ed1i th\u1ea5p. \u0110i\u1ec1u n\u00e0y r\u1ea5t quan tr\u1ecdng khi c\u1ed1 g\u1eafng s\u1eed d\u1ee5ng n\u00f3 \u0111\u1ec3 ho\u1ea1t \u0111\u1ed9ng tr\u00ean DC. H\u01a1n n\u1eefa, d\u00f2ng kh\u1edfi \u0111\u1ed9ng c\u1ee7a cu\u1ed9n d\u00e2y cao h\u01a1n nhi\u1ec1u so v\u1edbi d\u00f2ng gi\u1eef. \u0110\u01a1n v\u1ecb EXC7 c\u00f3 c\u00f4ng su\u1ea5t ti\u00eau th\u1ee5 t\u1eeb 60-200 VA t\u00f9y theo khung trong qu\u00e1 tr\u00ecnh k\u00e9o v\u00e0o v\u00e0 9-25 VA trong qu\u00e1 tr\u00ecnh gi\u1eef.<\/p>\n\n\n\n\n\n\n\n\n\n
Thu\u1ed9c t\u00ednh<\/th>\nCu\u1ed9n d\u00e2y AC<\/th>\nCu\u1ed9n d\u00e2y DC<\/th>\n<\/tr>\n
L\u00f5i<\/td>\nTh\u00e9p silic c\u00e1n m\u1ecfng (h\u00ecnh ch\u1eef E)<\/td>\nS\u1eaft \/ th\u00e9p \u0111\u1eb7c (th\u01b0\u1eddng h\u00ecnh ch\u1eef U)<\/td>\n<\/tr>\n
V\u00f2ng che ch\u1eafn<\/td>\nC\u1ea7n thi\u1ebft<\/td>\nKh\u00f4ng c\u1ea7n thi\u1ebft<\/td>\n<\/tr>\n
Gi\u1edbi h\u1ea1n d\u00f2ng \u0111i\u1ec7n<\/td>\nKh\u00e1ng c\u1ea3m<\/td>\n\u0110i\u1ec7n tr\u1edf cu\u1ed9n d\u00e2y<\/td>\n<\/tr>\n
Cu\u1ed9n d\u00e2y<\/td>\nS\u1ed1 v\u00f2ng \u00edt, d\u00e2y d\u00e0y<\/td>\nS\u1ed1 v\u00f2ng nhi\u1ec1u, d\u00e2y m\u1ecfng<\/td>\n<\/tr>\n
D\u00f2ng kh\u1edfi \u0111\u1ed9ng so v\u1edbi d\u00f2ng gi\u1eef<\/td>\nCh\u00eanh l\u1ec7ch l\u1edbn<\/td>\nG\u1ea7n nh\u01b0 b\u1eb1ng nhau (tr\u1eeb khi ti\u1ebft ki\u1ec7m)<\/td>\n<\/tr>\n
D\u1ef1a v\u00e0o vi\u1ec7c c\u1eaft d\u00f2ng \u0111i\u1ec7n t\u1ef1 nhi\u00ean; r\u00e3nh h\u1ed3 quang t\u00e1ch ra v\u00e0 l\u00e0m m\u00e1t h\u1ed3 quang<\/td>\nD\u00f2ng \u0111i\u1ec7n t\u1ef1 nhi\u00ean b\u1eb1ng kh\u00f4ng + b\u1ed9 d\u1eadp h\u1ed3 quang<\/td>\nTh\u1ed5i h\u1ed3 quang t\u1eeb t\u00ednh \/ \u0111\u01b0\u1eddng h\u1ed3 quang d\u00e0i<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

S\u1ed1 c\u1ef1c, Ampe v\u00e0 k\u00edch th\u01b0\u1edbc khung<\/h2>\n

Contactors \u0111\u01b0\u1ee3c x\u00e1c \u0111\u1ecbnh theo ba chi\u1ec1u c\u00f9ng l\u00fac: s\u1ed1 c\u1ef1c, \u0111\u1ecbnh m\u1ee9c d\u00f2ng \u0111i\u1ec7n v\u00e0 k\u00edch th\u01b0\u1edbc khung. Hi\u1ec3u \u0111\u01b0\u1ee3c ph\u1ea1m vi th\u1ef1c t\u1ebf gi\u00fap logic ch\u1ecdn k\u00edch th\u01b0\u1edbc tr\u1edf n\u00ean c\u1ee5 th\u1ec3.<\/p>\n

D\u00f2ng EXC7 ch\u1ea1y t\u1eeb c\u00e1c khung ti\u00eau chu\u1ea9n \u0111\u1ecbnh m\u1ee9c 9 A \u0111\u1ebfn 110 A v\u00e0 c\u00e1c khung d\u00f2ng cao \u0111\u1ecbnh m\u1ee9c t\u1eeb 120 A \u0111\u1ebfn 800 A, t\u1ea5t c\u1ea3 \u0111\u1ec1u \u1edf c\u1ea5u h\u00ecnh ba c\u1ef1c (3P). \u0110i\u1ec7n \u00e1p c\u00e1ch \u0111i\u1ec7n \u0111\u1ecbnh m\u1ee9c l\u00e0 690 V tr\u00ean c\u00e1c khung ti\u00eau chu\u1ea9n v\u00e0 1000 V tr\u00ean c\u00e1c khung d\u00f2ng cao, v\u1edbi \u0111i\u1ec7n \u00e1p ho\u1ea1t \u0111\u1ed9ng 380\/400 V ho\u1eb7c 660\/690 V. C\u00f4ng su\u1ea5t bao ph\u1ee7 t\u1eeb 4 kW \u1edf \u0111\u1ea7u nh\u1ecf \u0111\u1ebfn 450 kW tr\u00ean khung 800 A d\u01b0\u1edbi nhi\u1ec7m v\u1ee5 AC-4 t\u1ea1i 690 V.<\/p>\n

L\u01b0u \u00fd s\u1ef1 kh\u00e1c bi\u1ec7t trong gi\u00e1 tr\u1ecb c\u1ee7a hai c\u1ed9t trong b\u1ea3ng d\u01b0\u1edbi \u0111\u00e2y. Gi\u00e1 tr\u1ecb AC-1 l\u00e0 d\u00f2ng nhi\u1ec7t m\u00e0 c\u00e1c ti\u1ebfp \u0111i\u1ec3m c\u00f3 th\u1ec3 ch\u1ecbu \u0111\u01b0\u1ee3c; trong khi gi\u00e1 tr\u1ecb AC-3 l\u00e0 d\u00f2ng m\u00e0 thi\u1ebft b\u1ecb th\u1ef1c s\u1ef1 c\u00f3 th\u1ec3 chuy\u1ec3n m\u1ea1ch khi c\u00f3 \u0111\u1ed9ng c\u01a1 tham gia. \u0110\u1ed1i v\u1edbi khung nh\u1ecf nh\u1ea5t l\u00e0 20 A, trong khi \u0111\u1ed1i v\u1edbi khung l\u1edbn l\u00e0 9 A. Vi\u1ec7c ch\u1ecdn k\u00edch th\u01b0\u1edbc d\u1ef1a tr\u00ean s\u1ed1 \u0111\u1ea7u ti\u00ean v\u00e0 \u00e1p d\u1ee5ng cho \u0111\u1ed9ng c\u01a1 l\u00e0 l\u1ed7i ph\u1ed5 bi\u1ebfn nh\u1ea5t trong x\u00e2y d\u1ef1ng b\u1ea3ng \u0111i\u1ec1u khi\u1ec3n.<\/p>\n\n\n\n\n\n\n\n\n\n\n
Khung<\/th>\nAC-1 (Ith)<\/th>\nAC-3 t\u1ea1i 380\/400 V<\/th>\nAC-4 t\u1ea1i 380\/400 V<\/th>\nC\u00f4ng su\u1ea5t AC-3<\/th>\n<\/tr>\n
EXC7-09<\/td>\n20 A<\/td>\n9 A<\/td>\n5 A<\/td>\n4 kW<\/td>\n<\/tr>\n
EXC7-18<\/td>\n6 W<\/td>\n18 A<\/td>\n7 A<\/td>\n5 kW<\/td>\n<\/tr>\n
EXC7-32<\/td>\n50 A<\/td>\n6 W<\/td>\n12 A<\/td>\n15 kW<\/td>\n<\/tr>\n
EXC7-50<\/td>\n80 A<\/td>\n50 A<\/td>\n24 A<\/td>\n22 kW<\/td>\n<\/tr>\n
EXC7-95<\/td>\n125 A<\/td>\n95 A<\/td>\n44 A<\/td>\n45 kW<\/td>\n<\/tr>\n
EXC7-225 (khung d\u00f2ng \u0111i\u1ec7n cao)<\/td>\n275 A<\/td>\n225 A<\/td>\n\u2014<\/td>\n110 kW (AC-4)<\/td>\n<\/tr>\n
EXC7-800 (khung d\u00f2ng \u0111i\u1ec7n cao)<\/td>\n900 A<\/td>\n800 A<\/td>\n\u2014<\/td>\n450 kW (AC-4)<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

C\u00e1c khung d\u00f2ng \u0111i\u1ec7n cao kh\u00f4ng t\u01b0\u01a1ng \u0111\u01b0\u01a1ng v\u00ec nh\u00e0 s\u1ea3n xu\u1ea5t s\u1ebd cung c\u1ea5p \u0111\u1ecbnh m\u1ee9c d\u00f2ng AC-3 c\u00f9ng v\u1edbi \u0111\u1ecbnh m\u1ee9c c\u00f4ng su\u1ea5t AC-4 t\u00ednh b\u1eb1ng kW, \u0111i\u1ec1u n\u00e0y y\u00eau c\u1ea7u ng\u01b0\u1eddi d\u00f9ng ph\u1ea3i suy ra h\u1ec7 s\u1ed1 gi\u1ea3m t\u1ea3i t\u1eeb c\u00e1c b\u1ea3ng l\u1ef1a ch\u1ecdn khung li\u00ean quan thay v\u00ec c\u00f3 m\u1ed9t tham chi\u1ebfu r\u00f5 r\u00e0ng.<\/p>\n

M\u1ed9t y\u1ebfu t\u1ed1 kh\u00e1c c\u1ea7n \u0111\u01b0\u1ee3c xem x\u00e9t l\u00e0 s\u1ed1 c\u1ef1c. \u0110\u1ed1i v\u1edbi \u0111\u1ed9ng c\u01a1 ba pha, c\u00e1c \u0111\u01a1n v\u1ecb ba c\u1ef1c l\u00e0 ti\u00eau chu\u1ea9n; c\u00e1c t\u00f9y ch\u1ecdn m\u1ed9t c\u1ef1c v\u00e0 hai c\u1ef1c t\u1ed3n t\u1ea1i cho vi\u1ec7c ng\u1eaft trung t\u00ednh, t\u1ea3i m\u1ed9t pha ho\u1eb7c hai m\u1ea1ch ri\u00eang bi\u1ec7t, v\u00e0 \u0111i\u1ec1u quan tr\u1ecdng l\u00e0 ph\u1ea3i hi\u1ec3u r\u1eb1ng thi\u1ebft b\u1ecb hai c\u1ef1c ph\u1ea3i \u0111\u01b0\u1ee3c k\u1ebft n\u1ed1i kh\u00e1c v\u1edbi thi\u1ebft b\u1ecb m\u1ed9t c\u1ef1c m\u1eb7c d\u00f9 c\u1ea3 hai \u0111\u1ec1u c\u00f3 c\u00f9ng s\u1ed1 c\u1ef1c.<\/p>\n

Ngo\u00e0i ra, h\u1ecd khung c\u0169ng ph\u1ea3i \u0111\u01b0\u1ee3c t\u00ednh \u0111\u1ebfn khi t\u00ecm ki\u1ebfm ph\u1ee5 ki\u1ec7n. Kh\u1ed1i ti\u1ebfp \u0111i\u1ec3m ph\u1ee5 c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c g\u1eafn tr\u00ean \u0111\u1ec9nh ho\u1eb7c b\u00ean c\u1ea1nh, \u0111i k\u00e8m v\u1edbi c\u00e1c k\u1ebft h\u1ee3p kh\u00e1c nhau c\u1ee7a ti\u1ebfp \u0111i\u1ec3m th\u01b0\u1eddng m\u1edf ho\u1eb7c th\u01b0\u1eddng \u0111\u00f3ng, ch\u1ee9a \u0111\u1ea7u tr\u1ec5 th\u1eddi gian kh\u00ed n\u00e9n, n\u1eafp ch\u1ed1ng b\u1ee5i, m\u00f4-\u0111un gi\u1ea3m xung v\u00e0 kh\u00f3a c\u01a1 h\u1ecdc cho c\u00e1c c\u1eb7p \u0111\u1ea3o chi\u1ec1u.<\/p>\n

\"N\u01a1i<\/p>\n

Danh m\u1ee5c s\u1eed d\u1ee5ng: N\u01a1i th\u1ef1c s\u1ef1 di\u1ec5n ra vi\u1ec7c \u0111\u1ecbnh c\u1ee1 \u0111\u1ed9ng c\u01a1<\/h2>\n

Ph\u00e2n lo\u1ea1i s\u1eed d\u1ee5ng contactor \u0111\u01b0\u1ee3c thi\u1ebft l\u1eadp trong IEC 60947-4-1 b\u1eb1ng c\u00e1ch k\u1ebft h\u1ee3p c\u00e1c \u0111i\u1ec1u ki\u1ec7n v\u1eadn h\u00e0nh c\u1ee7a ch\u00fang ph\u1ea3i tr\u1ea3i qua c\u00e1c b\u00e0i ki\u1ec3m tra ph\u00ea duy\u1ec7t lo\u1ea1i. Trong s\u1ed1 c\u00e1c l\u1ef1a ch\u1ecdn kh\u00e1c nhau, c\u00f3 b\u1ed1n lo\u1ea1i \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng ph\u1ed5 bi\u1ebfn nh\u1ea5t trong th\u1ef1c t\u1ebf, v\u00e0 s\u1ef1 kh\u00e1c bi\u1ec7t kh\u00f4ng ch\u1ec9 mang t\u00ednh h\u00ecnh th\u1ee9c.<\/p>\n\n\n\n\n\n\n\n
Lo\u1ea1i<\/th>\nT\u1ea3i<\/th>\n\u0110\u00f3ng \/ ng\u1eaft<\/th>\n\u1ee8ng d\u1ee5ng \u0111i\u1ec3n h\u00ecnh<\/th>\n<\/tr>\n
AC-1<\/td>\nKh\u00f4ng c\u1ea3m \u1ee9ng ho\u1eb7c c\u1ea3m \u1ee9ng nh\u1eb9 (cos\u03c6 \u2265 0.95)<\/td>\n0 \u00d7 Ie<\/td>\nB\u1ed9 s\u01b0\u1edfi, l\u00f2 n\u01b0\u1edbng, chi\u1ebfu s\u00e1ng d\u00e2y t\u00f3c, ph\u00e2n ph\u1ed1i \u0111i\u1ec7n tr\u1edf<\/td>\n<\/tr>\n
AC-2<\/td>\n\u0110\u1ed9ng c\u01a1 v\u00f2ng tr\u01b0\u1ee3t (\u0111\u1ed9ng c\u01a1 roto qu\u1ea5n)<\/td>\n5 \u00d7 Ie<\/td>\nK\u00e9o d\u00e2y, m\u1ed9t s\u1ed1 b\u1ed9 truy\u1ec1n \u0111\u1ed9ng nh\u00e0 m\u00e1y c\u0169<\/td>\n<\/tr>\n
AC-3<\/td>\n\u0110\u1ed9ng c\u01a1 l\u1ed3ng s\u00f3c: kh\u1edfi \u0111\u1ed9ng, t\u1eaft khi \u0111ang ch\u1ea1y<\/td>\n6 \u00d7 Ie \u0111\u00f3ng, 1 \u00d7 Ie ng\u1eaft<\/td>\nM\u00e1y n\u00e9n, b\u01a1m, qu\u1ea1t, HVAC, b\u0103ng t\u1ea3i, thang m\u00e1y, m\u00e1y tr\u1ed9n<\/td>\n<\/tr>\n
AC-4<\/td>\n\u0110\u1ed9ng c\u01a1 l\u1ed3ng s\u00f3c: kh\u1edfi \u0111\u1ed9ng, c\u1eafm \u0111i\u1ec7n ng\u01b0\u1ee3c, ch\u1ea1y t\u1eebng b\u01b0\u1edbc, \u0111\u1ea3o chi\u1ec1u<\/td>\n6 \u00d7 Ie \u0111\u00f3ng, 6 \u00d7 Ie ng\u1eaft<\/td>\nPa l\u0103ng, c\u1ea7n c\u1ea9u, kh\u1edfi \u0111\u1ed9ng d\u1eebng nhanh, kh\u1edfi \u0111\u1ed9ng \u0111\u1ea3o chi\u1ec1u<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

\u00dd ngh\u0129a trong th\u1ef1c t\u1ebf. M\u1ed9t \u0111\u1ed9ng c\u01a1 s\u1ebd k\u00e9o d\u00f2ng \u0111i\u1ec7n kho\u1ea3ng s\u00e1u \u0111\u1ebfn m\u01b0\u1eddi l\u1ea7n gi\u00e1 tr\u1ecb d\u00f2ng \u0111i\u1ec7n t\u1ed1i \u0111a c\u1ee7a n\u00f3 khi kh\u1edfi \u0111\u1ed9ng, v\u00e0 contactor s\u1ebd ph\u1ea3i ch\u1ecbu \u0111\u01b0\u1ee3c \u0111i\u1ec1u ki\u1ec7n n\u00e0y. Trong tr\u01b0\u1eddng h\u1ee3p c\u00e1c ho\u1ea1t \u0111\u1ed9ng \u0111i\u1ec1u khi\u1ec3n \u0111\u1ed9ng c\u01a1 \u0111\u01a1n gi\u1ea3n khi n\u00f3 ch\u1ec9 b\u1eadt v\u00e0 t\u1eaft \u0111\u1ed9ng c\u01a1 trong khi \u0111\u1ed9ng c\u01a1 \u0111ang ch\u1ea1y, \u0111\u00f3 s\u1ebd l\u00e0 AC-3; do \u0111\u00f3, c\u1ed9t AC-3 ph\u1ea3i \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng. Trong tr\u01b0\u1eddng h\u1ee3p \u1ee9ng d\u1ee5ng \u0111\u1eb7c bi\u1ec7t kh\u00e1c khi \u0111\u1ed9ng c\u01a1 \u0111\u1ea3o chi\u1ec1u nhi\u1ec1u l\u1ea7n ho\u1eb7c ch\u1ea1y t\u1eebng b\u01b0\u1edbc, AC-4 s\u1ebd \u00e1p d\u1ee5ng v\u00e0 th\u1ef1c t\u1ebf, c\u1ea7n ph\u1ea3i t\u0103ng k\u00edch th\u01b0\u1edbc thi\u1ebft b\u1ecb v\u00ec khi AC-4 ng\u1eaft, d\u00f2ng \u0111i\u1ec7n cao g\u1ea5p s\u00e1u l\u1ea7n d\u00f2ng \u0111i\u1ec7n b\u00ecnh th\u01b0\u1eddng, do \u0111\u00f3 thi\u1ebft b\u1ecb th\u01b0\u1eddng ph\u1ea3i \u0111\u01b0\u1ee3c n\u00e2ng c\u1ea5p l\u00ean m\u1ed9t ho\u1eb7c hai khung v\u00e0 \u0111\u00f4i khi c\u00f3 thi\u1ebft b\u1ecb b\u1ea3o v\u1ec7 l\u1edbn h\u01a1n.<\/p>\n

B\u1ea3ng EXC7 c\u00f4ng b\u1ed1 c\u1ea3 hai c\u1ed9t gi\u00fap c\u00f3 th\u1ec3 ch\u1ecdn k\u00edch th\u01b0\u1edbc thi\u1ebft b\u1ecb ph\u00f9 h\u1ee3p. V\u00ed d\u1ee5, trong tr\u01b0\u1eddng h\u1ee3p khung 32 A AC-3 \u1edf 400 V, d\u00f2ng \u0111i\u1ec7n l\u00e0 32 A nh\u01b0ng \u0111\u1ed1i v\u1edbi AC-4 ch\u1ec9 l\u00e0 12 A. Ch\u1ea1y t\u1eebng b\u01b0\u1edbc 12 A tr\u00ean contactor 32 A \u0111\u01b0\u1ee3c ph\u00e9p nh\u01b0ng ch\u1ea1y t\u1eebng b\u01b0\u1edbc 25 A th\u00ec kh\u00f4ng \u0111\u01b0\u1ee3c ph\u00e9p.<\/p>\n

Contactor AC v\u00e0 DC kh\u00f4ng th\u1ec3 thay th\u1ebf cho nhau<\/h2>\n

\u0110\u00e2y l\u00e0 c\u00e2u h\u1ecfi \u0111\u01b0\u1ee3c h\u1ecfi nhi\u1ec1u nh\u1ea5t, v\u00e0 c\u00f3 ba l\u00fd do c\u01a1 h\u1ecdc gi\u1ea3i th\u00edch c\u00e2u tr\u1ea3 l\u1eddi.<\/p>\n

V\u00f2ng h\u1ed3 quang. D\u00f2ng \u0111i\u1ec7n xoay chi\u1ec1u \u0111\u1ea1t gi\u00e1 tr\u1ecb kh\u00f4ng hai l\u1ea7n m\u1ed7i chu k\u1ef3 sau \u0111\u00f3 v\u00f2ng h\u1ed3 quang m\u1ea5t n\u0103ng l\u01b0\u1ee3ng. N\u1ebfu kho\u1ea3ng c\u00e1ch gi\u1eefa c\u00e1c \u0111i\u1ec3m ti\u1ebfp x\u00fac v\u00e0 \u1ed1ng h\u1ed3 quang \u0111\u00e3 \u0111\u1ea1t \u0111\u01b0\u1ee3c \u0111\u1ed9 b\u1ec1n \u0111i\u1ec7n m\u00f4i, v\u00f2ng h\u1ed3 quang s\u1ebd kh\u00f4ng \u0111\u00e1nh l\u1ea1i. Do \u0111\u00f3, m\u00e1y bi\u1ebfn \u00e1p ti\u00eau chu\u1ea9n s\u1eed d\u1ee5ng kho\u1ea3ng c\u00e1ch nh\u1ecf v\u00e0 \u1ed1ng h\u1ed3 quang d\u1ea1ng l\u01b0\u1edbi. D\u00f2ng \u0111i\u1ec7n m\u1ed9t chi\u1ec1u kh\u00f4ng \u0111\u1ea1t gi\u00e1 tr\u1ecb kh\u00f4ng, do \u0111\u00f3 v\u00f2ng h\u1ed3 quang s\u1ebd ti\u1ebfp t\u1ee5c ho\u1ea1t \u0111\u1ed9ng cho \u0111\u1ebfn khi b\u1ecb ng\u1eaft. Contactor DC \u0111\u01b0\u1ee3c trang b\u1ecb cu\u1ed9n th\u1ed5i t\u1eeb, b\u1ed9 d\u1eabn h\u1ed3 quang, kho\u1ea3ng c\u00e1ch l\u1edbn h\u01a1n v\u00e0 \u0111\u00f4i khi l\u00e0 k\u00edn kh\u00ed ho\u1eb7c ch\u00e2n kh\u00f4ng. N\u1ebfu v\u00f2ng h\u1ed3 quang DC \u0111\u01b0\u1ee3c \u00e1p d\u1ee5ng cho contactor AC, n\u00f3 s\u1ebd l\u00e0m h\u1ecfng thi\u1ebft b\u1ecb, d\u1eabn \u0111\u1ebfn \u0103n m\u00f2n ho\u1eb7c h\u00e0n ch\u1eadp c\u00e1c ti\u1ebfp \u0111i\u1ec3m.<\/p>\n

Cu\u1ed9n d\u00e2y. \u0110\u00e2y l\u00e0 lo\u1ea1i h\u1ecfng h\u00f3c ph\u1ed5 bi\u1ebfn nh\u1ea5t. Tr\u1edf kh\u00e1ng c\u1ee7a cu\u1ed9n d\u00e2y AC ch\u1ee7 y\u1ebfu bao g\u1ed3m \u0111i\u1ec7n kh\u00e1ng c\u1ea3m \u1ee9ng, l\u00e0 m\u1ed9t h\u00e0m s\u1ed1 c\u1ee7a t\u1ea7n s\u1ed1. N\u1ebfu cu\u1ed9n d\u00e2y \u0111\u01b0\u1ee3c k\u1ebft n\u1ed1i v\u1edbi DC, t\u1ea7n s\u1ed1 tr\u1edf th\u00e0nh kh\u00f4ng, \u0111i\u1ec7n kh\u00e1ng tr\u1edf th\u00e0nh kh\u00f4ng, v\u00e0 cu\u1ed9n d\u00e2y s\u1ebd ho\u1ea1t \u0111\u1ed9ng nh\u01b0 m\u1ed9t \u0111i\u1ec7n tr\u1edf v\u1edbi \u0111i\u1ec7n tr\u1edf r\u1ea5t th\u1ea5p. Do \u0111\u00f3, d\u00f2ng \u0111i\u1ec7n s\u1ebd t\u0103ng l\u00ean 5-10 l\u1ea7n gi\u00e1 tr\u1ecb \u0111\u1ecbnh m\u1ee9c, v\u00e0 cu\u1ed9n d\u00e2y s\u1ebd b\u1ecb ch\u00e1y trong v\u00e0i gi\u00e2y. Qu\u00e1 tr\u00ecnh ng\u01b0\u1ee3c l\u1ea1i kh\u00f4ng \u0111\u00e1ng ch\u00fa \u00fd nh\u01b0 v\u1eady, nh\u01b0ng v\u1eabn l\u00e0 m\u1ed9t l\u1ed7i: cu\u1ed9n d\u00e2y DC tr\u00ean AC kh\u00f4ng th\u1ec3 ho\u1ea1t \u0111\u1ed9ng \u0111\u00fang c\u00e1ch, v\u00ec n\u00f3 c\u00f3 \u0111i\u1ec7n tr\u1edf cao h\u01a1n.<\/p>\n

L\u00f5i. M\u1ed9t l\u00f5i r\u1eafn ho\u1ea1t \u0111\u1ed9ng d\u01b0\u1edbi DC \u1ed5n \u0111\u1ecbnh s\u1ebd b\u1ecb ch\u00e1y d\u01b0\u1edbi AC. Ngo\u00e0i ra, m\u1ed9t l\u00f5i AC l\u00e0m l\u00e3ng ph\u00ed v\u1eadt li\u1ec7u cho DC. \u0110\u00e2y l\u00e0 c\u00e2u tr\u1ea3 l\u1eddi m\u00e0 c\u00e1c k\u1ef9 s\u01b0 th\u01b0\u1eddng xuy\u00ean hi\u1ec3u sai: contactor AC s\u1eed d\u1ee5ng l\u00f5i d\u1ea1ng l\u00e1, trong khi contactor DC s\u1eed d\u1ee5ng l\u00f5i r\u1eafn.<\/p>\n

M\u1eb7c d\u00f9 c\u00f3 c\u00e1c cu\u1ed9n d\u00e2y AC\/DC \u0111a n\u0103ng \u0111\u01b0\u1ee3c l\u00e0m v\u1edbi b\u1ed9 ch\u1ec9nh l\u01b0u v\u00e0 b\u1ed9 \u0111i\u1ec1u ch\u1ec9nh, ch\u00fang v\u1eabn c\u00f3 gi\u00e1 cao h\u01a1n v\u00e0 ch\u1ec9 ho\u1ea1t \u0111\u1ed9ng trong m\u1ed9t s\u1ed1 ph\u1ea1m vi \u0111i\u1ec7n \u00e1p nh\u1ea5t \u0111\u1ecbnh. N\u1ebfu nh\u00e3n ch\u1ec9 \u0111\u1ecbnh m\u1ed9t \u0111i\u1ec7n \u00e1p v\u00e0 lo\u1ea1i duy nh\u1ea5t, h\u00e3y gi\u1ea3 \u0111\u1ecbnh \u0111i\u1ec1u \u0111\u00f3 l\u00e0 \u0111\u00fang. Cung c\u1ea5p cu\u1ed9n d\u00e2y sai l\u00e0 m\u1ed9t trong nh\u1eefng c\u00e1ch nhanh nh\u1ea5t \u0111\u1ec3 ph\u00e1 h\u1ee7y contactor.<\/p>\n

Khi b\u1ea1n c\u1ea7n m\u1ed9t contactor DC cho c\u00e1c \u1ee9ng d\u1ee5ng chuy\u1ec3n m\u1ea1ch DAV th\u1ef1c t\u1ebf nh\u01b0 pin, chu\u1ed7i DC n\u0103ng l\u01b0\u1ee3ng m\u1eb7t tr\u1eddi, tr\u1ea1m s\u1ea1c EV ho\u1eb7c b\u1ed9 \u0111i\u1ec1u khi\u1ec3n DC. C\u1ea3nh quan s\u1ea3n xu\u1ea5t cho d\u00f2ng s\u1ea3n ph\u1ea9m \u0111\u00f3 l\u00e0 m\u1ed9t chu\u1ed7i cung \u1ee9ng kh\u00e1c, v\u00e0 t\u1ed5ng quan n\u00e0y v\u1ec1 c\u00e1c nh\u00e0 m\u00e1y contactor DC h\u00e0ng \u0111\u1ea7u<\/a> l\u00e0 m\u1ed9t \u0111i\u1ec3m kh\u1edfi \u0111\u1ea7u h\u1eefu \u00edch \u0111\u1ec3 t\u00ecm ngu\u1ed3n cung \u1ee9ng.<\/p>\n

Contactor c\u00f3 ph\u1ea3i l\u00e0 b\u1ed9 ng\u1eaft m\u1ea1ch kh\u00f4ng?<\/h2>\n

Kh\u00f4ng, v\u00e0 s\u1ef1 nh\u1ea7m l\u1eabn n\u00e0y g\u00e2y ra l\u1ed7i thi\u1ebft k\u1ebf th\u1ef1c s\u1ef1. Ba thi\u1ebft b\u1ecb kh\u00e1c nhau th\u1ef1c hi\u1ec7n ba c\u00f4ng vi\u1ec7c kh\u00e1c nhau.<\/p>\n\n\n\n\n\n\n\n\n
Thi\u1ebft b\u1ecb<\/th>\nC\u00f4ng vi\u1ec7c<\/th>\nNg\u1eaft qu\u00e1 d\u00f2ng<\/th>\nT\u1ea7n s\u1ed1 ho\u1ea1t \u0111\u1ed9ng<\/th>\n<\/tr>\n
R\u01a1 le ti\u1ebfp x\u00fac<\/td>\nChuy\u1ec3n m\u1ea1ch t\u1eeb xa c\u1ee7a t\u1ea3i<\/td>\nKh\u00f4ng c\u00f3<\/td>\nR\u1ea5t cao (h\u00e0ng tr\u0103m ngh\u00ecn chu k\u1ef3)<\/td>\n<\/tr>\n
R\u01a1 le<\/td>\nChuy\u1ec3n m\u1ea1ch m\u1ea1ch \u0111i\u1ec1u khi\u1ec3n v\u00e0 logic<\/td>\nKh\u00f4ng c\u00f3<\/td>\nCao, nh\u01b0ng d\u00f2ng \u0111i\u1ec7n th\u1ea5p<\/td>\n<\/tr>\n
C\u1ea7u dao<\/td>\nNg\u1eaft l\u1ed7i v\u00e0 qu\u00e1 t\u1ea3i<\/td>\nC\u00f3<\/td>\nTh\u1ea5p (v\u1eadn h\u00e0nh hi\u1ebfm)<\/td>\n<\/tr>\n
R\u01a1 le qu\u00e1 t\u1ea3i nhi\u1ec7t<\/td>\nB\u1ea3o v\u1ec7 qu\u00e1 t\u1ea3i \u0111\u1ed9ng c\u01a1<\/td>\nC\u00f3, th\u00f4ng qua contactor<\/td>\nNg\u1eaft m\u1ed9t l\u1ea7n, sau \u0111\u00f3 \u0111\u1eb7t l\u1ea1i<\/td>\n<\/tr>\n
B\u1ed9 b\u1ea3o v\u1ec7 m\u1ea1ch \u0111\u1ed9ng c\u01a1 (MCP)<\/td>\nCh\u1ec9 b\u1ea3o v\u1ec7 ng\u1eafn m\u1ea1ch<\/td>\nCh\u1ec9 t\u1eeb t\u00ednh<\/td>\nHi\u1ebfm<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

Contactor kh\u00f4ng \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf \u0111\u1ec3 x\u1eed l\u00fd b\u1ea5t k\u1ef3 s\u1ef1 ki\u1ec7n ng\u1eafn m\u1ea1ch n\u00e0o, v\u00e0 c\u00e1c ti\u1ebfp \u0111i\u1ec3m c\u1ee7a n\u00f3 s\u1ebd b\u1ecb h\u01b0 h\u1ecfng n\u1ebfu c\u1ed1 g\u1eafng l\u00e0m v\u1eady. B\u1ed9 kh\u1edfi \u0111\u1ed9ng \u0111\u1ed9ng c\u01a1 c\u00f3 t\u1ea5t c\u1ea3 ba thi\u1ebft b\u1ecb ho\u1ea1t \u0111\u1ed9ng \u0111\u1ed3ng b\u1ed9: contactor th\u1ef1c hi\u1ec7n vi\u1ec7c chuy\u1ec3n m\u1ea1ch, r\u01a1 le qu\u00e1 t\u1ea3i \u0111\u1ea3m b\u1ea3o r\u1eb1ng \u0111\u00e3 c\u00f3 d\u00f2ng qu\u00e1 t\u1ea3i k\u00e9o d\u00e0i v\u00e0 m\u1edf m\u1ea1ch cu\u1ed9n contactor, s\u1ef1 gi\u00e1n \u0111o\u1ea1n d\u00f2ng \u0111i\u1ec7n trong m\u1ea1ch x\u1ea3y ra \u1edf ph\u00eda tr\u00ean b\u1edfi b\u1ed9 ng\u1eaft m\u1ea1ch ho\u1eb7c c\u1ea7u ch\u00ec. \u0110\u00f3 l\u00e0 l\u00fd do t\u1ea1i sao ch\u00fang ta c\u1ea7n bi\u1ebft v\u1ec1 x\u1ebfp h\u1ea1ng ph\u1ed1i h\u1ee3p Lo\u1ea1i 1 v\u00e0 Lo\u1ea1i 2 v\u00ec ch\u00fang cho bi\u1ebft \u0111i\u1ec1u g\u00ec s\u1ebd x\u1ea3y ra v\u1edbi contactor khi c\u00f3 ng\u1eafn m\u1ea1ch v\u1edbi x\u1ebfp h\u1ea1ng Lo\u1ea1i 2 c\u00f3 ngh\u0129a l\u00e0 kh\u00f4ng cho ph\u00e9p h\u00e0n ti\u1ebfp \u0111i\u1ec3m.<\/p>\n

\"Contactor<\/p>\n

N\u01a1i s\u1eed d\u1ee5ng contactor AC<\/h2>\n

N\u0103m lo\u1ea1i \u1ee9ng d\u1ee5ng chi\u1ebfm ph\u1ea7n l\u1edbn trong ng\u00e0nh.<\/p>\n