초록 ▼

A switchgear assembly in which a number of cells housing electrical switching apparatus such as circuit breakers are vertically stacked in a forward compartment has combined arc shield/wire trays between cells for terminating secondary wiring for easy access through front doors on the switchgear ass

A switchgear assembly in which a number of cells housing electrical switching apparatus such as circuit breakers are vertically stacked in a forward compartment has combined arc shield/wire trays between cells for terminating secondary wiring for easy access through front doors on the switchgear assembly and for protecting the secondary wiring from circuit breaker arc gases. The arc gases are deflected by an upwardly and rearwardly inclined panel forming the back wall of the wire tray. A vertical wall forward of the inclined panel mounts a lower horizontal row of terminal blocks forward of an upper row. A wireway has a vertical section in a forward corner of the cabinet beside the vertically stacked cells which communicates with the wire trays, and a horizontal section extending rearward under the top wall of the cabinet. An inclined gutter provides a transition between the top of the vertical section and the forward end of the horizontal section. External wiring enters the wireway either through a bottom access opening aligned with the vertical section or a top access opening in the horizontal section. A depending lip on the rear of the arc shield diverts the arc gases laterally into a vertical chamber behind the vertical section of the wireway for expansion and cooling.

대표청구항 ▼

1. Switchgear apparatus, comprising: electrical switching apparatus having an arc chute vent spaced rearwardly in an upper surface thereof,a cabinet having a forward compartment and an additional compartment behind said forward compartment; a cell in said forward compartment for mounting said electr

1. Switchgear apparatus, comprising: electrical switching apparatus having an arc chute vent spaced rearwardly in an upper surface thereof,a cabinet having a forward compartment and an additional compartment behind said forward compartment; a cell in said forward compartment for mounting said electrical switching apparatus, therein; and an arc shield mounted over said cell and having an arc deflecting member positioned above said arc vent and inclined upward and rearwardly to deflect arc gases ejected through said arc vent.