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

Claim 0:
1. An electrical system, comprising:
an enclosure having a door movable for access to an interior of the enclosure;
an electrical device disposed in the interior of the enclosure, the electrical device being operable to be turned on or off, wherein the electrical device is selectively coupled to a busway structure;
an operating handle on the door outside the enclosure that is operable to open and close the door, wherein with the door closed the operating handle is engaged to the electrical device and with the door open the operating handle is disengaged from the electrical device and wherein with the door closed rotation of the operating handle turns the electrical device on or off;
a cam assembly on the door that rotates with rotation of the operating handle;
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, wherein the interlock mechanism is connected to the cam assembly, wherein with the door closed rotation of the operating handle rotates the cam assembly which displaces 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; 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.