Electrical enclosure and electrical bus assembly therefor

• US 7,558,053 B2
• Filed: 11/07/2007
• Issued: 07/07/2009
• Est. Priority Date: 11/07/2007
• Status: Active Grant

• Current Assignee: Eaton Intelligent Power Limited (Eaton Corporation PLC.)
• Original Assignee: Eaton Corp. (Wisconsin) (Eaton Corporation PLC.)
• Inventors: Abrahamsen, Michael H., Moore, Stanley E., Rowell, Amy W.
• Primary Examiner(s): Chervinsky; Boris L
• Application Number:
  US11/936,348
• Publication Number:
  US 20090116177A1
• Time in Patent Office: 608 Days
• Field of Search: None
• US Class Current: 361/611
• CPC Class Codes: H02B 1/21 Bus-bar arrangements for rack-mounted devices with withdrawable units

Abstract

An electrical bus assembly for an electrical enclosure includes a single branch circuit with a plurality of branch circuit buses. First electrical bus members include first ends electrically connected to corresponding branch circuit buses, and second ends electrically connected to a first circuit breaker. Second electrical bus members include first ends electrically connected to corresponding branch circuit buses, and second ends electrically connected to a second circuit breaker. The single branch circuit provides electrical power to the first and second circuit breakers. The first electrical bus members extend in a first lateral direction with respect to the branch circuit buses, and the second electrical bus members extend in a second, opposite lateral direction. The electrical bus assembly enables the first circuit breaker to be disposed horizontally adjacent to the second circuit breaker within a corresponding one of the cells of the electrical enclosure.

Claims

1. An electrical bus assembly for an electrical enclosure, said electrical enclosure including a first end, a second end disposed opposite and distal from the first end, a first side, a second side disposed opposite and distal from the first side, a number of cells, a plurality of electrical switching apparatus, and a primary circuit including a plurality of primary electrical buses structured to be electrically connected to said electrical switching apparatus, said electrical bus assembly comprising:

a single branch circuit comprising a plurality of branch circuit buses, each of said branch circuit buses being structured to extend from a corresponding one of said primary electrical buses at or about the first end of said electrical enclosure toward the second end of said electrical enclosure;

a plurality of first electrical bus members, each of said first electrical bus members including a first end and a second end, the first end of said each of said first electrical bus members being electrically connected to a corresponding one of said branch circuit buses, the second end of said each of said first electrical bus members being structured to be electrically connected to a first one of said electrical switching apparatus;

a plurality of second electrical bus members, each of said second electrical bus members including a first end and a second end, the first end of said each of said second electrical bus members being electrically connected to a corresponding one of said branch circuit buses, the second end of said each of said second electrical bus members being structured to be electrically connected to a second one of said electrical switching apparatus,

wherein said single branch circuit is structured to provide electrical power to said first one of said electrical switching apparatus and said second one of said switching apparatus,

wherein said first electrical bus members extend in a first lateral direction with respect to said branch circuit buses and said second electrical bus members extend in a second lateral direction, with respect to said branch circuit buses,

wherein said first lateral direction of said first electrical bus members is generally opposite from said second lateral direction of said second electrical bus members, and

wherein said electrical bus assembly is structured to enable said first one of said electrical switching apparatus to be disposed horizontally adjacent to said second one of said electrical switching apparatus within a corresponding one of said number of cells of said electrical enclosure.

2. The electrical bus assembly of claim 1 wherein said plurality of branch circuit buses of said single branch circuit is a first branch bus, a second branch bus, and a third branch bus;

wherein said plurality of first electrical bus members is a first pair of electrical bus members, a second pair of electrical bus members, and a third pair of electrical bus members; and

wherein said plurality of second electrical bus members is a fourth pair of electrical bus members, a fifth pair of electrical bus members, and a sixth pair of electrical bus members.

3. The electrical bus assembly of claim 2 wherein said first pair of electrical bus members is structured to be disposed closer to the first end of said electrical enclosure than said fourth pair of electrical bus members;

wherein said second pair of electrical bus members is structured to be disposed closer to the first end of said electrical enclosure than the fifth pair of electrical bus members; and

wherein said third pair of electrical bus members is structured to be disposed closer to the first end of said electrical enclosure than said sixth pair of electrical bus members.

4. The electrical bus assembly of claim 3 wherein said first pair of electrical bus members is vertically spaced from, and parallel with respect to, said fourth pair of electrical bus members, said fifth pair of electrical bus members, and said sixth pair of electrical bus members;

wherein said second pair of electrical bus members is vertically spaced from, and parallel with respect to, said fifth pair of electrical bus members and said sixth pair of electrical bus members; and

wherein said third pair of electrical bus members is vertically spaced from, and parallel with respect to, said sixth pair of electrical bus members.

5. The electrical bus assembly of claim 2 wherein said electrical bus assembly has a width;

wherein said width is defined by the distance between said third pair of electrical bus members and said fourth pair of electrical bus members; and

wherein said width is less than 22 inches.

6. The electrical bus assembly of claim 2 wherein each electrical bus member of said plurality of first electrical bus members and said plurality of second electrical bus members has a first end, a second end, and an intermediate portion therebetween;

wherein said intermediate portion includes a first bend in a first direction and a second bend in a second direction; and

wherein said first direction of said first bend is opposite said second direction of said second bend in order that said intermediate portion is substantially perpendicular with respect to the first end of said each electrical bus member and the second end of said each electrical bus member.

7. The electrical bus assembly of claim 6 wherein at least said intermediate portion of said each electrical bus member is covered by an electrical insulator.

8. The electrical bus assembly of claim 6 wherein said intermediate portion of each electrical bus member of said first pair of electrical bus members extends substantially horizontally with respect to said plurality of branch circuit buses and overlays at least a portion of said second pair of electrical bus members;

wherein said intermediate portion of each electrical bus member of said second pair of electrical bus members extends substantially horizontally with respect to said plurality of branch circuit buses and overlays at least a portion of said third pair of electrical bus members;

wherein said intermediate portion of at least one electrical bus member of said fifth pair of electrical bus members extends substantially horizontally with respect to said plurality of branch circuit buses and overlays at least a portion of said fourth pair of electrical bus members; and

wherein said intermediate portion of each electrical bus member of said sixth pair of electrical bus members extends substantially horizontally with respect to said plurality of branch circuit buses and overlays at least a portion of said fifth pair of electrical bus members.

9. The electrical bus assembly of claim 2 wherein said first pair of electrical bus members is electrically connected to said first branch bus;

wherein said second pair of electrical bus members is electrically connected to said second branch bus;

wherein said third pair of electrical bus members is electrically connected to said third branch bus;

wherein said fourth pair of electrical bus members is electrically connected to said first branch bus proximate said first pair of electrical bus members;

wherein said fifth pair of electrical bus members is electrically connected to said second branch bus proximate said second pair of electrical bus members; and

wherein said sixth pair of electrical bus members is electrically connected to said third branch bus proximate said third pair of electrical bus members.

10. The electrical bus assembly of claim 9 wherein said first pair of electrical bus members is structured to extend from said first branch bus toward the second side of said electrical enclosure;

wherein said second pair of electrical bus members is structured to extend from said second branch bus toward the second side of said electrical enclosure;

wherein said second pair of electrical bus members is disposed between said first pair of electrical bus members and said third pair of electrical bus members;

wherein said third pair of electrical bus members is structured to extend from said third branch bus toward the second side of said electrical enclosure;

wherein said third pair of electrical bus members is structured to be disposed between the second side of said electrical enclosure and said second pair of electrical bus members;

wherein said fourth pair of electrical bus members is structured to extend from said first branch bus toward the first side of said electrical enclosure;

wherein the fifth pair of electrical bus members is structured to extend from said second branch bus toward the first side of said electrical enclosure;

wherein said fifth pair of electrical bus members is disposed between said fourth pair of electrical bus members and said sixth pair of electrical bus members;

wherein said sixth pair of electrical bus members is structured to extend from said third branch bus toward the first side of said electrical enclosure; and

wherein the sixth pair of electrical bus members is structured to be disposed between the first side of said electrical enclosure and said fifth pair of electrical bus members.

11. An electrical enclosure comprising:

a first end;

a second end disposed opposite and distal from the first end;

a first side;

a second side disposed opposite and distal from the first side;

a number of cells;

a plurality of electrical switching apparatus disposed in said number of cells;

a primary circuit including a plurality of primary electrical buses, said primary electrical buses being electrically connected to said electrical switching apparatus; and

an electrical bus assembly comprising;

a single branch circuit comprising a plurality of branch circuit buses, each of said branch circuit buses extending from a corresponding one of said primary electrical buses of said primary circuit at or about the first end of said electrical enclosure toward the second end of said electrical enclosure,

a plurality of first electrical bus members, each of said first electrical bus members including a first end and a second end, the first end of said each of said first electrical bus members being electrically connected to a corresponding one of said branch circuit buses, the second end of said each of said first electrical bus members being electrically connected to a first one of said electrical switching apparatus,

a plurality of second electrical bus members, each of said second electrical bus members including a first end and a second end, the first end of said each of said second electrical bus members being electrically connected to a corresponding one of said branch circuit buses, the second end of said each of said second electrical bus members being electrically connected to a second one of said electrical switching apparatus,

wherein said single branch circuit provides electrical power to said first one of said electrical switching apparatus and said second one of said switching apparatus,

wherein said first electrical bus members extend in a first lateral direction with respect to said branch circuit buses and said second electrical bus members extend in a second lateral direction with respect to said branch circuit buses,

wherein said first lateral direction of said first electrical bus members is generally opposite from said second lateral direction of said second electrical bus members, and

wherein said first one of said electrical switching apparatus is disposed horizontally adjacent to said second one of said electrical switching apparatus within a corresponding one of said number of cells of said electrical enclosure.

12. The electrical enclosure of claim 11 wherein said plurality of branch circuit buses of said single branch circuit is a first branch bus, a second branch bus, and a third branch bus;

wherein said plurality of first electrical bus members is a first pair of electrical bus members, a second pair of electrical bus members, and a third pair of electrical bus members; and

wherein said plurality of second electrical bus members is a fourth pair of electrical bus members, a fifth pair of electrical bus members, and a sixth pair of electrical bus members.

13. The electrical enclosure of claim 12 wherein each electrical bus member of said plurality of first electrical bus members and said plurality of second electrical bus members has a first end, a second end, and an intermediate portion therebetween;

wherein said intermediate portion includes a first bend in a first direction and a second bend in a second direction; and

wherein said first direction of said first bend is opposite said second direction of said second bend in order that said intermediate portion is substantially perpendicular with respect to the first end of said each electrical bus member and the second end of said each electrical bus member.

14. The electrical enclosure of claim 13 wherein said intermediate portion of each electrical bus member of said first pair of electrical bus members extends substantially horizontally with respect to said plurality of branch circuit buses and overlays at least a portion of said second pair of electrical bus members;

wherein said intermediate portion of each electrical bus member of said second pair of electrical bus members extends substantially horizontally with respect to said plurality of branch circuit buses and overlays at least a portion of said third pair of electrical bus members;

wherein said intermediate portion of at least one electrical bus member of said fifth pair of electrical bus members extends substantially horizontally with respect to said plurality of branch circuit buses and overlays at least a portion of said fourth pair of electrical bus members; and

wherein said intermediate portion of each electrical bus member of said sixth pair of electrical bus members extends substantially horizontally with respect to said plurality of branch circuit buses and overlays at least a portion of said fifth pair of electrical bus members.

15. The electrical enclosure of claim 12 wherein said first pair of electrical bus members is electrically connected to said first branch bus;

wherein said second pair of electrical bus members is electrically connected to said second branch bus;

wherein said third pair of electrical bus members is electrically connected to said third branch bus;

wherein said fourth pair of electrical bus members is electrically connected to said first branch bus proximate said first pair of electrical bus members;

wherein said fifth pair of electrical bus members is electrically connected to said second branch bus proximate said second pair of electrical bus members; and

wherein said sixth pair of electrical bus members is electrically connected to said third branch bus proximate said pair of third electrical bus members.

16. The electrical enclosure of claim 15 wherein said first pair of electrical bus members extends from said first branch bus toward the second side of said electrical enclosure;

wherein said second pair of electrical bus members extends from said second branch bus toward the second side of said electrical enclosure;

wherein said second pair of electrical bus members is disposed between said first pair of electrical bus members and said third pair of electrical bus members;

wherein said third pair of electrical bus members extends from said third branch bus toward the second side of said electrical enclosure;

wherein said third pair of electrical bus members is disposed between the second side of said electrical enclosure and said second pair of electrical bus members;

wherein said fourth pair of electrical bus members extends from said first branch bus toward the first side of said electrical enclosure;

wherein the fifth pair of electrical bus members extends from said second branch bus toward the first side of said electrical enclosure;

wherein said fifth pair of electrical bus members is disposed between said fourth pair of electrical bus members and said sixth pair of electrical bus members;

wherein said sixth pair of electrical bus members extends from said third branch bus toward the first side of said electrical enclosure; and

wherein the sixth pair of electrical bus members is disposed between the first side of said electrical enclosure and said fifth pair of electrical bus members.

17. The electrical enclosure of claim 12 wherein said at least one electrical switching apparatus is a first circuit breaker and a second circuit breaker;

wherein said first circuit breaker and said second circuit breaker are disposed side-by-side in said corresponding one of said number of cells of said electrical enclosure; and

wherein said plurality of electrical bus members is a first plurality of stabs electrically connectable to said first circuit breaker and a second plurality of stabs electrically connectable to said second circuit breaker.

18. The electrical enclosure of claim 12 wherein said electrical enclosure includes a first horizontal plane and a second horizontal plane;

wherein said first pair of electrical bus members, said second pair of electrical bus members, and said third pair of electrical bus members are disposed in said first horizontal plane; and

wherein said fourth pair of electrical bus members, said fifth pair of electrical bus members, and said sixth pair of electrical bus members are disposed in said second horizontal plane.

19. The electrical enclosure of claim 11 wherein said corresponding one of said cells of said electrical enclosure has a width of about 22 inches;

and wherein said electrical bus assembly has a width of less than 22 inches.