ACB(Preset Variety, Draw out Variety) This can be a upcoming-generation form ACB with dynamic characteristic dependability enormously improved by adopting digital overcurrent relay in-built with high-precision A/D conversion circuit utilized for measuring devices.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?