Patent ID: 9627127
Date: 2017-04-18
CPC Classifications: H01F

Claim:
1. An energy-saving device designed to be inserted between a three-phase power source and a three-phase load, of the type comprising a three-phase electrical transformer, each phase of which comprises a transformation assembly involving a primary winding designed to be connected at a first end to one phase of said power source and electromagnetically coupled to a secondary winding connected at its second end to a phase of said load, wherein the second ends of said primary windings in each of said transformation assemblies lying opposite said first ends are electrically connected to one another by first means for switching, and wherein each of said secondary windings is connected in parallel to second means for switching for enabling or disabling the operation of said energy-saving device between said power source and said load; and wherein said first end of each of said primary windings is connected to said first end of the corresponding secondary winding, so as to define a common reference between said primary winding and said secondary winding.