Abstract: A load breaker arrangement includes first and second input terminals, respectively, and first and second output terminals. The arrangement also includes two relays connected in series with one another, wherein the two relays are coupled between the second input terminal and the second output terminal, a semiconductor switch connected in parallel with one of the two relays, and a third relay coupled between the first input terminal and the first output terminal. A control circuit, in a load breaker mode, turns on the semiconductor switch while the two relays and the third relay are closed, then opens the one of the two relays in parallel with the semiconductor switch, then opens the semiconductor switch to break a current between the second input and second output terminals, and then opens the other of the two relays not in parallel with the semiconductor switch and opens the third relay.

Abstract: The inverter housing (1) has a cooling unit (2) for cooling the electronic and/or electric components (4, 5, 5a) of the inverter. The housing (1) of the inverter comprises at least two chambers, the two chambers (7, 8) being separated by a wall (6) for receiving the electronic and/or electric components (4, 5, 5a), the components (5) comprise cooling bodies (4) located on the one side of the wall in the one chamber (7) with the cooling bodies (4) being located on the other side of the wall (6) in the other chamber (5) and the electric or electronic component to be cooled have a high protection grade, the component (5a) being located in the other chamber (8), preferably on the wall side of the wall (6) of the other chamber (8), the other chamber (8) comprising the cooling unit (2).

Abstract: A method of converting a direct voltage generated by a decentralized power supply system into three-phase alternating voltage by means of a plurality of single-phase inverters (WR1-WR3), said alternating voltage being provided for supplying an electric mains, is intended to avoid inadmissible load unbalances using single-phase inverters. This is achieved in that, upon failure of one inverter (WR1-WR3), an asymmetrical power supply distribution is reduced by limiting the output of the other inverters. The method makes it possible to simplify three-phase voltage monitoring.