Allen-bradley Company, LLC

Frank A Grabarczyk

Albert A Zaffrann, Jr

Robert E Borchardt

Jay M Erdman

A disconnect switch includes a crossbar assembly having an arm at each of its ends which rotatably fastens the assembly to a frame for swinging motion around a pivot axis. Three movable contact assemblies are carried by the crossbar between a closed position in which their line side ends engage stationary contacts and an opened position in which their line side ends are disengaged. Stationary connectors aligned along the pivot axis engage the load side ends of the movable contact assemblies at all positions of the crossbar.

Disconnect switch

A trip mechanism mounts to either side of a disconnect switch to couple the rotatable crossbar thereon to a manually operable handle. The trip mechanism is symmetrical about a vertical plane with the result that it may be mounted to the disconnect switch for either left hand or right hand operation with little modification. A unique coupling arrangement between the trip mechanism and the manually operable handle facilitates installation and connection of the disconnect switch in enclosures of various types and sizes.

Trip mechanism for disconnect switch

A three-pole disconnect switch includes a crossbar which is rotatably mounted to a housing and pivots three movable contact blades between opened and closed positions. Each movable contact blade is removably mounted to the cross-bar and makes slidable electric contact with a connector. When in its closed position, each movable contact blade makes electrical connection with a stationary line contact. Modular arc chutes are slidably received in mating cavities formed in the housing above each set of contacts and a pair of auxiliary contact cartridges are received in chambers formed in the housing between the main contacts. A trip mechanism is mounted to the side of the housing and couples one end of the crossbar to a manually operated handle.

Growing community of inventors

Milwaukee, WI, United States of America

Frank A Grabarczyk