ACB(Preset Style, Draw out Kind) That is a future-technology type ACB with dynamic characteristic trustworthiness greatly improved by adopting digital overcurrent relay built-in with higher-precision A/D conversion circuit used for measuring instruments.– ?i?u ch?nh th?i gian chuy?n m?ch tr?c ti?p trên m?t c?a b? ?i?u khi?nBy Tr?n Hoài Th??ng &