Patent ID: 11869740
Assignee: ABB SCHWEIZ AG
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H | IPC H

Claim 11:
12. An electrical system, comprising:
an enclosure having a door for access to an interior of the enclosure;
an electrical device in the interior of enclosure and a shaft extending therefrom, wherein the electrical device is configured to be operated by a rotation of the shaft, wherein the electric device is coupled to a busway structure;
an operating handle disposed outside the enclosure and coupled to the electrical device with the door closed, wherein the operating handle is operative to rotate the shaft to turn the electrical device on or off;
an interlock mechanism including an interlock device movable between an engaged position and a disengaged position relative to the busway structure wherein in the engaged position the interlock device couples the busway structure to the electrical device and in the disengaged position the interlock device uncouples the busway structure from the electrical device; and
a cam assembly on the door that is connected to the interlock mechanism, wherein the cam assembly is operable upon rotation of the operating handle to displace the interlock device between the engaged position or the disengaged position relative to the busway structure, wherein the cam assembly includes a first cam on the door that rotates with rotation of the operating handle between an on position and an off position; and a second cam on the door that is linked to the first cam, wherein the second cam rotates to effect movement of the interlock device between the engaged position and the disengaged position in response to the operating handle being rotated to turn the electrical device on or off; and
wherein, in response to tripping of the electrical device, the first cam rotates with the operating handle from the on position to an intermediate position toward the off position, and the second cam remains stationary so the interlock device remains in the engaged position relative to the busway structure and the electrical device remains off; and
a first shaft having a first end connected to the cam assembly and a second end connected to a pivot arm; and
wherein the interlock mechanism includes a slide plate connecting the pivot arm to the interlock device, wherein rotation of the shaft causes the pivot arm to translate the slide plate to displace the interlock device for engagement or disengagement with the busway structure.