Patent ID: 11961656
Assignee: SCHWEITZER ENGINEERING LABORATORIES, INC.
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H | IPC H

Claim 10:
11. A method of manufacturing a current transformer comprising:
providing a pre-formed core by shaping a core to form a loop with at least two transverse flat regions coupled by a curve;
obtaining a flexible bobbin comprising a duct extending through the flexible bobbin;
axially winding a continuous length of wire around the flexible bobbin to form a secondary winding; and
placing the secondary winding onto at least a portion of the pre-formed core, wherein the pre-formed core is inserted through the duct of the flexible bobbin and the secondary winding conforms to a shape of the pre-formed core with a first end and a second end of the secondary winding positioned at an equivalent chord of an elliptical shape, the flexible bobbing comprising a winding track, the flexible bobbin conforming to a shape of the pre-formed core.