- A controller of your swap for precise synchronous calculation by the microprocessor is needed for overlap switching in between the commercial energy supply and the standby power offer.B? chuy?n ??i ngu?n ATS Osung ???c s?n xu?t b?i th??ng Hello?u Osung ??n t? Hàn Qu?c nay th??ng Hello?u OSUNG ???c chuy?n ??i thành th??ng hi?u OSEMCO.We at O-S