公开(公告)号：US11652358B2

公开(公告)日：2023-05-16

申请号：US16717202

申请日：2019-12-17

Applicant: ABB Schweiz AG

Inventor： Roberto Usai ,  Marco Testa ,  Yaser Khalifa ,  Andrea Bianco

IPC: H02J9/06 ,  H02J7/00 ,  H02J9/00

CPC classification number: H02J9/06 ,  H02J7/00 ,  H02J7/0029 ,  H02J7/00302 ,  H02J9/00 ,  H02J9/061

Abstract: An UPS device for electric power distribution installations, the UPS device including: first electric terminals for electrical connection with an electric load to be fed by the UPS device; second electric terminals for electrical connection with a power supply source adapted to feed the UPS device; third electric terminals for electrical connection with a back-up unit adapted to feed the UPS device, when the power supply source is not available, the back-up unit having one or more replaceable batteries; a power conversion stage electrically connectable with the first, second and third electric terminals, the power conversion stage being adapted to receive a power supply voltage from the power supply source or a back-up voltage from the back-up unit, when the power supply source is not available, and being adapted to provide an adjustable load voltage to the electric load; and an interface stage to electrically couple or decouple the back-up unit with or from the power conversion stage. The interface stage includes a feeding circuit to temporary feed the controller during a transient time interval following a replacement of the batteries of the back-unit.