The invention relates to a power supply system (26) for at least one electrical load (12), comprising at least one uninterruptible power supply (UPS) (14), a power output connection of the UPS (14) being connected to the at least one electrical load (12), ...

The present invention provides a UPS and a DC-DC converter, where the UPS includes: a rectifier, an inverter, and a DC-DC converter. An input end of the DC-DC converter is connected to a BUS+, a BUS-, and an N wire. In this way, an input voltage is relativ...

A lighting system with reduced standby power according to the embodiment includes a main control unit to control a lighting device; a driver to supply the control signal to the lighting device; and an AC-DC converting circuit to supply power to the driver....

A dc energy store system includes an ac power supply (14), an AC/DC power converter (10), a DC/DC power converter (4) and a dc energy store (2). DC terminals of the AC/DC power converter (10) are connected to the DC/DC power converter (4) by a first dc lin...