ACB(Preset Type, Draw out Kind) It is a following-technology form ACB with dynamic attribute trustworthiness greatly improved by adopting digital overcurrent relay built in with high-precision A/D conversion circuit used for measuring instruments.– ?i?u ch?nh th?i gian chuy?n m?ch tr?c ti?p trên m?t c?a b? ?i?u khi?n– ?i?u ch?nh th?i gian chuy