Flexible voltage transformation system

A multi-voltage power transformer for providing a plurality of different power grid voltage ratios, the power transformer comprising:

• a first set of windings comprising at least one first low voltage winding and at least one first high voltage winding, the at least one first high voltage including at least one winding having a voltage rating that is higher than a voltage rating of the at least one first low voltage winding;
• and
• a second set of windings comprising at least one second low voltage winding and at least one second high voltage winding, the at least one second high voltage including at least one winding having a voltage rating that is higher than a voltage rating of the at least one second low voltage winding;
• and
• a switch,
• wherein the apparatus includes a pre-existing parallel electrical connection providing a first power grid voltage ratio between the at least one first low voltage winding and the at least one second low voltage winding and a pre-existing serial electrical connection providing a second power grid voltage ratio between the at least one first low voltage winding and the at least one second low voltage winding, and
• wherein the apparatus includes a pre-existing parallel electrical connection providing a third power grid voltage ratio between the at least one first high voltage winding and the at least one second high voltage winding and a pre-existing serial electrical connection providing a fourth power grid voltage ratio between the at least one first high voltage winding and the at least one second high voltage winding.

A multi-voltage power transformer for providing a plurality of different power grid voltage ratios, the power transformer comprising:

• a first set of windings disposed about a first leg of a transformer core, at least two windings of the first set of windings being electrically coupled to a first switch to selectively provide a pre-existing parallel connection providing a first power grid voltage ratio between the at least two windings of the first set of windings and a pre-existing serial connection providing a second power grid voltage ratio between the at least two windings of the first set of windings;
• a second set of windings disposed about a second leg of the transformer core, at least two windings of the second set of windings being electrically coupled to a second switch to selectively provide a pre-existing parallel connection providing a third power grid voltage ratio between the at least two windings of the second set of windings and a pre-existing serial connection providing a fourth power grid voltage ratio between the at least two windings of the second set of windings;
• and
• a third switch, wherein the first set of windings and the second set of windings is electrically coupled to the third switch to selectively provide a parallel connection providing a fifth power grid voltage ratio between the first set of windings and the second set of windings and a serial connection providing a sixth power grid voltage ratio between the first set of windings and the second set of windings.