ACB(Fixed Sort, Draw out Variety) That is a future-technology type ACB with dynamic characteristic trustworthiness tremendously improved by adopting digital overcurrent relay in-built with substantial-precision A/D conversion circuit used for measuring instruments.S? d?ng cho h? th?ng ?i?n h? th? khi ngu?n c?p ph? t?i b? gián ?o?n B? chuy?n m?ch t