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

Claim 7:
8. A system to operate an electrical device in an enclosure, comprising:
an operating handle mountable on a door of the enclosure;
a shaft for engaging the operating handle to the electrical device in the enclosure with the door closed and for disengaging the operating handle from the electrical device with the door open, wherein rotation of the operating handle with the door closed turns the electrical device on or off, wherein the electrical device is coupled to a busway structure;
a cam assembly engaged to and rotatable by the shaft via the operating handle; and
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, the interlock mechanism being removably engaged to the cam assembly with the door closed for rotation via the cam assembly upon rotation of the operating handle to displace the interlock device to the engaged position or the disengaged position;
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;
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.