Switch-operating mechanism with particular application thereof to potential-transformer disconnecting assembly

Claim 2

A potential-transformer disconnecting assembly including a rotatably mounted tray, one or more potential transformers carried by said rotatably mounted tray, an actuating member, a driving cam-plate member, means pivotally mounting said driving cam-plate member for rotative movement about a fixed pivot, means engaging the actuating member with the rotatably-mounted driving cam-plate member for effecting the rotation of the cam-plate member about said fixed pivot, means pivotally mounting the tray member for rotative movement about a second fixed pivot, and means carried by said driving cam-plate member for engaging said rotatably mounted tray for effecting the rotation thereof about said second fixed pivot.

Claim 3

The combination according to claim 1, wherein a line contact finger is associated with each potential transformer, a line contact is aligned with each potential-transformer contact finger, and the line fingers make contacting and disengaging motions relative to the line contacts.

Claim 4

The combination according to claim 1, wherein a movable shutter member is provided, and a shutter-operating lever is pivotally mounted upon a fixed pivot and has one end thereof moved by rotative movement of said cam-plate member.

Claim 5

Metal-clad switchgear comprising, in combination, means defining a plurality of line terminals, metallic cell means having an insulating barrier member with a plurality of openings at the rear side of the cell means, a potential-transformer disconnecting switch assembly disposed within the cell and comprising a rotatably-mounted tray carrying a plurality of potential transformers having line fingers associated therewith, an insulating shutter member contiguously disposed and sliding relevant to said insulating barrier member and having a plurality of openings therein, an operating mechanism for said potential-transformer assembly including an actuating member, a driving member, means pivotally mounting the driving member for rotative movement upon a fixed pivot, means engaging the actuating member with the rotatably-mounted driving member for effecting the rotation thereof about said fixed pivot, means for pivotally mounting the tray member about a fixed pivot, means carried by said driving member for engaging said rotatably-mounted tray member to effect the rotation of the tray member and thereby effect engagement and disengagement of the respective potential-transformer contact fingers with line terminals, a shutter-operating lever pivotally mounted upon a fixed pivot, means carried by the movable driving member for rotating the free end of the shutter lever during the opening and closing movements of the driving member, and means interconnecting the other end of the shutter-operating lever with said movable shutter member so that the shutter member will move and effect alignment of the openings during the closing operation of the driving member.

Claim 6

Metal-clad switchgear comprising, in combination, means defining a plurality of line terminals, metallic cell means having an insulating barrier member with a plurality of openings at the rear side of the cell means, a potential-transformer disconnecting switch assembly disposed within the cell and comprising a rotatably-mounted tray carrying a plurality of potential transformers having line fingers associated therewith, an insulating shutter member contiguously disposed and sliding relevant to said insulating barrier member and having a plurality of openings therein, an operating mechanism for said potential-transformer assembly including an actuating member, a driving member, means pivotally mounting the driving member for rotative movement upon a fixed pivot, means engaging the actuating member with the rotatably-mounted driving member for effecting the rotation thereof about said fixed pivot, means for pivotally mounting the tray member about a fixed pivot, means carried by said driving member for engaging said rotatably-mounted tray member to effect the rotation of the tray member and thereby effect engagement and disengagement of the respective potential-transformer contact fingers with line terminals, a shutter-operating lever pivotally mounted upon a fixed pivot, means carried by the movable driving member for rotating the free end of the shutter lever during the opening and closing movements of the driving member, and means interconnecting the other end of the shutter-operating lever with said movable shutter member so that the shutter member will move and effect alignment of the openings during the closing operation of the driving member.

Claim 7

The combination according to claim 4, wherein the driving member is a driving cam-plate member, and the interconneCting means comprises a cam-slot member carried by the movable shutter member.

Claim 8

The combination according to claim 5, wherein the cam-plate member has a pair of spaced detent portions provided thereon, and a spring-biased roller assembly positively engages said detent portions in the open and closed positions of the driving cam-plate member.

Claim 9

Metal-clad switchgear apparatus comprising, in combination, means defining a potential-transformer compartment having a front door and a rear insulating barrier member with a plurality of spaced openings therein, a movable shutter plate having spaced openings therein which removably registers with the first said openings, means mounting a plurality of line terminals behind said barrier member, a pivotally-mounted tray having a plurality of potential transformers secured thereto and rotatable therewith, each potential transformer having a contact finger which removably projects through a registered opening and contacts one of said line terminals, operating means for said pivotally-mounted tray for effecting the rotation thereof and simultaneous movement of the movable shutter, whereby the potential transformers are removably connected to the line terminals for metering or relaying purposes and when disconnected the shutter means will close to prevent accidental contact with said energized line terminals.

Claim 10

Metal-clad switchgear apparatus comprising, in combination, means defining a potential-transformer compartment having a front door and a rear insulating barrier member with a plurality of spaced openings therein, a movable shutter plate having spaced openings therein which removably registers with the first said openings, means mounting a plurality of line terminals behind said barrier member, a pivotally-mounted tray having a plurality of potential transformers secured thereto and rotatable therewith, each potential transformer having a contact finger which removably projects through a registered opening and contacts one of said line terminals, operating means for said pivotally-mounted tray for effecting the rotation thereof and simultaneous movement of the movable shutter, whereby the potential transformers are removably connected to the line terminals for metering or relaying purposes and when disconnected the shutter means will close to prevent accidental contact with said energized line terminals.

Claim 11

The combination of claim 7, wherein the shutter plate moves laterally, and the operating means includes a rotatable driving cam plate.

Claim 12

The combination of claim 8, wherein the driving cam plate also rotates a pivotally mounted shutter-operating lever.

Claim 13

The combination of claim 7, wherein the door is interlocked with the operating mechanism so that the door cannot be opened when the fingers are in engagement with the spaced line terminals.