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ACB(Preset Type, Draw out Kind) That is a upcoming-technology style ACB with dynamic attribute trustworthiness greatly enhanced by adopting digital overcurrent relay built in with substantial-precision A/D conversion circuit employed for measuring devices.Sá»­ dụng cho hệ thống Ä‘iện hạ thế khi nguồn cấp phụ tải bị gián Ä‘oáº