ACB(Preset Type, Draw out Kind) That is a future-technology style ACB with dynamic characteristic reliability significantly improved by adopting digital overcurrent relay built in with higher-precision A/D conversion circuit utilized 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? ??n