- A controller from the switch for precise synchronous calculation from the microprocessor is needed for overlap switching between the business electric power offer as well as standby ability offer.B? chuy?n ??i ngu?n ATS Osung ???c s?n xu?t b?i th??ng hi?u Osung ??n t? Hàn Qu?c nay th??ng hi?u OSUNG ???c chuy?n ??i thành th??ng Hello?u OSEMCO.