Compact bus bar assembly, switching device and power distribution system

• US 9,343,250 B2
• Filed: 02/20/2014
• Issued: 05/17/2016
• Est. Priority Date: 04/20/2011
• Status: Active Grant

• Current Assignee: Rockwell Automation Switzerland GmbH (Rockwell Automation, Inc.)
• Original Assignee: Rockwell Automation Switzerland GmbH (Rockwell Automation, Inc.)
• Inventors: Marzano, Thomas Strebel, Feller, Willy
• Primary Examiner(s): Datskovskiy, Michail V
• Application Number:
  US14/185,039
• Publication Number:
  US 20140166621A1
• Time in Patent Office: 817 Days
• Field of Search: 361/601, 361/605, 361/608, 361/611, 361/612, 361/614, 361/620, 361/623, 361/624, 361637-640, 361/648, 361/656, 361/658, 361/644, 174/68.2, 174/70.B, 174/71.B, 174/72.B, 174/88.B, 174/99.B, 174/117.F, 174/117.R, 174/149.R, 174/149.B, 174/137.R, 174/133.B, 439/212, 439/372, 439/530, 439/527, 200/304, 200/306, 200/293, 200/149, 200/155, 200/48.R, 200/50.A, 200/166.R, 218/22, 218/34, 218/117, 218/118, 218/149, 218/155, 218/134, 218/143, 218/140, 218 2- 14, 218/16, 218/43, 218/153, 218/154, 218/70, 218/74, 218/78, 218/84, 218/92, 218/119, 312/223.1, 296/22
• US Class Current: 1/1
• CPC Class Codes: H01H 11/00 Apparatus or processes specially adapted for the manufacture of electric switches processes specially adapted for manufacture of rectilinearly movable switches having a plurality of operating members associated with different sets of contacts, e.g. keyboards, H01H13/88
• CPC Class Codes: H01H 33/06 Insulating body insertable between contacts
• CPC Class Codes: H01H 71/08 Terminals; Connections
• CPC Class Codes: H01H 71/082 Connections between juxtaposed circuit breakers
• CPC Class Codes: H02B 1/205 for connecting electrical apparatus mounted side by side on a rail
• CPC Class Codes: Y10T 29/49105 Switch making

Abstract

A contact bus bar assembly for supplying power to a load, and further pertains to a switching device which can be connected to such a compact bus bar assembly, and to a power distribution system. The bus bar assembly includes at least two electrically conductive tracks which are at least partly covered by an electrically insulating cover. An outer surface of said insulating cover is provided with a plurality of ribs arranged in a region connecting pin terminals. The switching device may additionally comprise a separating element provided with a plurality of second ribs.

Claims

1. Switching device comprising:

at least one contact device for opening and closing an electrical connection between an input line and an output line;

an electrically insulating housing;

at least one input connector that is constructed to be electrically connected to a compact bus bar for connecting said input line to an external terminal; and

wherein said housing comprises at least one separating element for electrically separating said input connector from another connector, and wherein said separating element is provided with a plurality of ribs extending across a creepage current path between said input connector and said other connector.

2. Switching device according to claim 1, wherein said separating element comprises an at least partly closed collar arranged around said input connector, wherein said plurality of ribs is provided at least on an outer side wall of said collar which is adjacent to the other connector.

3. Switching device according to claim 1, wherein said separating element and said plurality of ribs are dimensioned to define a creepage distance of more than or equal to 2.0 inches (50.8 mm) between said input connector and said other connector.

4. Switching device according to claim 1, wherein said separating element and said plurality of ribs are dimensioned to define an air gap of more than or equal to 1.0 inch (25.4 mm) between said input connector and said other connector.

5. Switching device according to claim 1, wherein at least two input connectors are arranged within said housing, each of the input connectors being surrounded by a collar carrying ribs on a side wall adjacent to the respective other input connector.

6. Switching device according to claim 1, wherein at least three input connectors are arranged with said housing, each of the input connectors being associated with a collar carrying ribs on a side wall adjacent to the other input connectors such that the switching device can communicate three-phase power to the external terminal.

7. A switching device assembly comprising:

an electrically insulating housing;

at least one input connector for connecting an input line to an external terminal;

a non-conductive separating element defined as a collar that extends about the at least one input connector and disposed proximate the at least one input connector for electrically separating the input connector from an adjacent connector; and

a plurality of ribs formed in the non-conductive separating element and extending across a creepage current path between the at least one input connector and an adjacent connector.

8. The switching device assembly of claim 7 further comprising another input connector adjacent the at least input connector and another non-conductive separating element having a plurality of ribs formed therein that extend across a creepage current path between the at least one input connector and the another input connector.

9. The switching device of claim 7 wherein the plurality of ribs are oriented on multiple faces of the non-conductive separating element.

10. The switching device of claim 7 wherein the plurality of ribs are oriented in a crossing direction relative to another plurality of ribs associated with a bus bar constructed to be electrically connected to the at least one input connector.

11. The switching device of claim 7 wherein the non-conductive separating element and the plurality of ribs are dimensioned to define a creepage distance of more than or equal to 2.0 inches (50.8 mm) and an air gap of more than or equal to 1.0 inch (25.4 mm) between the input connector and an adjacent connector.

12. A method of forming a switching device assembly comprising:

providing at least one contact device that is operable to open and close an electrical connection between an input, line and an output line;

disposing an electrically insulating housing about at least a portion of 1 e at least one contact device;

providing a plurality of connectors that are each in electrical communication with one of the input line and the output line for connecting the respective input line or output line to a respective external terminal;

positioning a separating element having a plurality of ribs between at least two adjacent connectors such that the plurality of ribs are oriented to extend across a creepage current path between the at least two adjacent connectors; and

forming each separating element as a collar shaped to extend about a respective one of the plurality of connectors.

13. The method of claim 12 further comprising positioning a separating element proximate each of the plurality of connectors.

14. The method of claim 12 further comprising electrically connecting the input line and the output line to a bus bar.

15. The method of claim 14 further comprising providing the bus bar with an electrically conductive cover having a plurality of ribs which are oriented to be transversely aligned with the plurality of ribs of the separating element.

16. The method of claim 12 wherein the switching device assembly is formed by a molded case circuit breaker (MCCB).

17. The method of claim 12 further comprising forming the separating element and the plurality of ribs to define a creepage distance of more than or equal to 2.0 inches (50.8 mm) and an air gap of more than or equal to 1.0 inch (25.4 mm) between the adjacent connectors.

18. Switching device comprising:

at least one contact device for opening and closing an electrical connection between an input line and an output line;

an electrically insulating housing;

at least one input connector for connecting said input line to an external terminal; and

said housing comprising at least one separating element that comprises an at least partly closed collar arranged around said input connector for electrically separating said input connector from another connector, and wherein said separating element is provided with a plurality of ribs on at least an outer side will of said at least partly closed collar which is adjacent to the other connector and that extend across a creepage current path between said input connector and said other connector.

19. Switching device comprising:

at least one contact device for opening and closing an electrical connection between an input line and an output line;

an electrically insulating housing;

at least two input connectors for connecting said input line to an external terminal; and

wherein said housing comprises a separating element for electrically separating each input connector from another connector, and wherein each separating element is provided as a collar carrying a plurality of ribs on a side wall that is adjacent to another input connector such that the plurality of ribs extend across a creepage current path between each of the respective at least two input connectors.

20. A switching device assembly comprising:

an electrically insulating housing;

at least one input connector for connecting an input line to an external terminal;

a non-conductive separating element disposed proximate the at least one input connector for electrically separating the input connector from an adjacent connector; and

a plurality of ribs formed in and oriented on multiple faces of the non-conductive separating element and extending across a creepage current path between the at least one input connector and an adjacent connector.

21. A switching device assembly comprising:

an electrically insulating housing;

at least one input connector for connecting an input line to an external terminal;

a non-conductive separating element disposed proximate the at least one input connector for electrically separating the input connector from an adjacent connector; and

a plurality of ribs formed in the non-conductive separating element and extending across a creepage current path between the at least one input connector and an adjacent connector such that the plurality of ribs are oriented in a crossing direction relative to another plurality of ribs associated with a bus bar constructed to be electrically connected to the at least one input connector.

22. A method of forming a switching device assembly comprising:

providing at least one contact device that is operable to open and close an electrical connection between an input line and an output line;

disposing an electrically insulating housing about at least a portion of the at least one contact device;

providing a plurality of connectors that are each in electrical communication with one of the input line and the output line for connecting the respective input line or output line to a respective external terminal; and

positioning a separating element having a plurality of ribs between at least two adjacent connectors such that the plurality of ribs are oriented to extend across a creepage current path between the at least two adjacent connectors; and

electrically connecting the input line and the output line to a bus bar.

23. The method of claim 22 further comprising providing the bus bar with an electrically conductive cover having a plurality of ribs which are oriented to be transversely aligned with the plurality of ribs of the separating element.