Electrical supply system for an aircraft with a legacy AC network and a bipolar DC network

An aircraft comprising an electrical supply system, the electrical supply system comprising:

• a generator having a plurality of phases and a neutral point;
• an AC network;
• a bi polar DC network;
• and
• a neutral point clamped converter;
• wherein the generator provides an AC voltage;
• wherein the neutral point of the generator is connected to ground, in at least one mode of operation;
• wherein the converter comprises an AC side having a plurality of AC connectors, each of which is couplable with at least one phase of the generator, and comprises a DC side having a first DC connector, a second DC connector and a neutral DC connector;
• wherein the AC side of the converter is coupled with the generator, the DC side is coupled with the bipolar DC network, and the neutral DC connector is connected to ground;
• and
• wherein the convertor provides a DC voltage on the DC side upon receiving an AC voltage on the AC side, and provides an AC voltage on the AC side upon receiving a DC voltage on the DC side,
• further comprising a first switch and a second switch, wherein the first switch is arranged directly between the generator and the converter to selectively interrupt a connection of the generator and the converter, independent of a position of the second switch, and wherein the second switch is arranged directly between the generator and the AC network to selectively interrupt a connection of the generator to the AC network, independent of a position of the first switch, and
• a third switch, wherein the third switch is arranged between a first branch point between the first switch and the AC side of the converter and a second branch point between the second switch and the AC network to selectively provide a connection of the AC network to the AC side of the converter.