Patent ID: 7450406
Filing Date: 2008-11-11
Classification: H02J,H02M

Abstract:
1. A power supply arrangement, comprising: a first input for connecting to a first power source; at least one second input for connecting to at least one second power source; an output for connecting to a load; at least two paralleled inverter modules supplied by said at least one second input, each of said inverter modules comprising an internal switch for switching a connection from the respective inverter module to said load; and a static switch module for switching a connection from said first power source to said load, wherein the power supply arrangement switches from an off-line mode, in which power for the output is directly supplied from the first power source through a closed switching device of the static switch module and in which the internal switches of the inverter modules are open, to an on-line mode, by closing the internal switches of the inverter modules, such that the inverter modules are connected to the output and by opening the switching device of the static switch module to separate the output from the first input, whereby the closing of the internal switches happens very rapidly such that in case of a power failure the output is permanently supplied with power.