- A controller with the change for exact synchronous calculation with the microprocessor is required for overlap switching among the industrial electrical power provide along with the standby electricity supply.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 He