ACB(Fixed Kind, Draw out Variety) That is a upcoming-technology type ACB with dynamic attribute trustworthiness significantly improved by adopting digital overcurrent relay in-built with high-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? ??ng, g