ACB(Preset Kind, Draw out Sort) That is a next-technology type ACB with dynamic characteristic reliability tremendously enhanced by adopting electronic overcurrent relay in-built with superior-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,