Patent ID: 11946983
Assignee: ABB SCHWEIZ AG
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC G  H | IPC G  H

Claim 16:
17. A ground fault circuit interrupt (GCFI) device, comprising:
a printed circuit board comprising circuitry configured to detect ground faults and circuitry configured to test the ground fault circuitry; and
a current transformer disposed on the printed circuit board, the current transformer comprising:
a housing comprising generally cylindrical outer and inner walls defining a generally annular internal chamber between a first side of the inner wall and the outer wall and a generally cylindrical central opening defined by a second side of the inner wall;
a generally toroidal current transformer core disposed within the internal chamber;
a secondary wiring disposed about the transformer core configured to generate a current in response to magnetic flux in the transformer core;
a pin housing disposed on the housing adjacent the base, the pin housing comprising electrically conductive pins; and
a test wire that passes through the central opening and outside the internal chamber;
wherein the secondary wiring is electrically connected to a first pair of the pins and the test wire is electrically connected to a second pair of the pins.