ACB(Preset Sort, Draw out Variety) It is a subsequent-technology sort ACB with dynamic attribute reliability greatly improved by adopting electronic overcurrent relay inbuilt with large-precision A/D conversion circuit useful 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, giám