Patent ID: 8884732

Claim:
A network transformer for providing power to a secondary network comprising: a ferromagnetic core comprising at least one limb extending between the first and second yokes; at least one coil assembly comprising a high-voltage primary winding disposed around a low-voltage secondary winding mounted to said at least one limb and wherein each said high-voltage and low-voltage winding is wound in an elliptical shape around said at least one limb; a hermetically-sealed enclosure encapsulated by a polymer sealant, said hermetically-sealed enclosure having an interior space within which said ferromagnetic core and said coil assembly are disposed, said hermetically-sealed enclosure having a connective throat extending from a wall of said hermetically-sealed enclosure to enclose electrical connections between low-voltage terminations and an input of a network protector; a combustion-inhibiting gas disposed within said interior space of said hermetically-sealed enclosure, said combustion-inhibiting gas surrounding said ferromagnetic core and said at least one coil assembly and wherein said combustion-inhibiting gas is maintained at a pressure in the range of 0.25 atmosphere to 1 atmosphere and at a temperature in order to prevent the operating temperature of the transformer from exceeding 220 degrees Celsius; and said network protector removeably mounted to said connective throat of said hermetically-sealed enclosure, said network protector being operable to protect said network transformer from power flowing from said secondary network.