Interruption-free power supply arrangement, has control unit alternately controlling power supply devices so that electrical energy is transported from supply networks to network to be secured only by power supply devices

摘要

The arrangement (1) has inverters (23, 33) including outputs (24, 34), which are connected with a network (L1') to be secured. Inputs (20, 30) of rectifiers (21, 31) and the outputs of the inverters are connected in parallel to each other. A control unit (4) alternately controls interruption-free power supply devices (2, 3) for supply of the network to be secured when the network is undisturbedly supplied so that electrical energy is transported from supply networks (L1, VN) to the network to be secured only by the interruption-free power supply devices.