Patent ID: 6169674
Filing Date: 2001-01-02
Classification: H02M

Abstract:
A three-phase transformer, comprising: a first closed winding circuit including six windings serially connected to define six contact points wherein each contact point is on a series connecting segment between a respective two of said findings and wherein three of said contact points define a first three-phase port and the other three of said contact points define a second three-phase port such that a three-phase voltage at said first three-phase port is phase displaced by a first phase displacement relative to a three-phase voltage at said second three-phase port; a second closed winding circuit electromagnetically coupled to said first closed winding circuit, said second closed winding circuit including six windings serially connected to define six contact points wherein each of these contact points is on a respective series connecting segment between a respective two of said windings of said second closed winding circuit and wherein three of said contact points of said second closed winding circuit define a third three-phase port and the other three of said contact points of said second closed winding circuit define a fourth three-phase port such that a three-phase voltage at said third three-phase port is phase displaced by a second phase displacement relative to a three-phase voltage at said fourth three-phase port; a housing having said first and second closed winding circuits disposed therein; a first connector connected to said housing and to said first and second three-phase ports such that said first connector is adapted to connect an external three-phase line to a selected one of said first and second three-phase ports; and a second connector connected to said housing and to said third and fourth three-phase ports such that said second connector is adapted to connect an external three-phase line to a selected one of said third and fourth three-phase ports.