Patent Application
20060232913
1. Field of the Invention
The present invention relates to a circuit breaker support insulator and, more specifically, to a consolidated circuit breaker support insulator and bus alignment piece.
2. Background Information
For certain enclosed circuit breaker configurations, external, socket busing was coupled to vertical busing at a circuit breaker support insulator assembly. The circuit breaker was enclosed in a housing assembly having a sidewall. The external socket busing, typically three buses, extended through an opening in the sidewall and each bus ended in a horizontal terminal. The sidewall opening was covered with a non-conductive bus alignment piece. The bus alignment piece included an opening for each socket bus. Each bus opening on the bus alignment piece was structured to place the bus that extended therethrough in the proper position for coupling with an associated horizontal bus. During installation, the bus alignment piece was coupled to the socket busing by passing the socket buses through the openings prior to positioning the horizontal terminals into the circuit breaker housing. The bus alignment piece was then coupled to the housing assembly by fasteners. Thus, each horizontal terminal was placed in the proper position to be coupled to the horizontal buses.
The horizontal terminals were also supported by a circuit breaker support insulator assembly within the circuit breaker housing assembly. The circuit breaker support insulator assembly included a generally planar, non-conductive member and a number of horizontal buses. The circuit breaker support insulator assembly also included two brackets, a first bracket structured to couple the planar, non-conductive member to the circuit breaker, and a second bracket structured to couple the planar, non-conductive member to the circuit breaker housing assembly. The planar, non-conductive member was coupled to each horizontal terminal by two fasteners. The planar, non-conductive member was typically structured to position two horizontal terminals on an upper side of the planar, non-conductive member and one horizontal terminal on the lower side of the planar, non-conductive member. The horizontal buses were structured to be coupled to the horizontal terminals and extend generally perpendicular thereto. The distal ends of the horizontal buses extended beyond the edge of the planar, non-conductive member and were generally aligned. The distal ends of the horizontal buses were structured to be coupled to the vertical buses. Each horizontal bus was coupled to the horizontal terminal by two fasteners. Thus, the prior art circuit breaker support insulator assembly and bus alignment piece included multiple components and an excessive number of fasteners.
There is, therefore, a need for a consolidated circuit breaker support insulator and bus alignment piece that requires fewer fasteners.
There is a further need for the consolidated circuit breaker support insulator and bus alignment piece to be compatible with prior art circuit breaker housing assemblies and socket buses.
These needs, and others, are met by the present invention which provides for a consolidated circuit breaker support insulator and bus alignment piece having a molded piece and at least one horizontal conductor. Preferably, there are three horizontal conductors. Each horizontal conductor is structured to extend between, and be in electrical communication with, a socket bus horizontal terminal and a vertical conductor. The molded support includes a non-conductive body having a vertical plate and a horizontal plate. The vertical plate includes an opening for each socket bus horizontal terminal. The openings are structured to position the horizontal terminals in a selected location. The vertical plate is further structured to be coupled to the circuit breaker housing assembly vertical wall and to be disposed within the circuit breaker housing vertical wall opening. The horizontal plate includes a plurality of short vertical walls which form a pocket structured to border each set of horizontal terminals and horizontal conductors. Each horizontal conductor extends generally perpendicular to the associated horizontal terminal and towards a first edge of the horizontal plate. Adjacent to the first edge of the horizontal plate, each pocket includes a horizontal wall having an opening. Each vertical conductor is passed through a horizontal wall opening before being coupled to the horizontal bus. Thus, the combination of the pockets, horizontal buses, and vertical conductors act to secure the molded body in a selected location and thereby eliminate the need for a number of fasteners that were required in the prior art. Additionally, by virtue of the fact that the molded body includes both the circuit breaker support insulator and the bus alignment piece, the total number of components is reduced. Moreover, because the horizontal plate is coupled to the vertical plate, the need for two support brackets is eliminated. However, if desired, one support bracket may be used to couple the horizontal plate to a circuit breaker.
A full understanding of the invention can be gained from the following description of the preferred embodiments when read in conjunction with the accompanying drawings in which:
As shown in
The consolidated circuit breaker support insulator and bus alignment piece 26 includes a molded body 30 and the horizontal buses 32A, 32B, 32C. The molded body 30 is molded from a non-conductive material such as, but not limited to, DuPont Crastin® HF672FR manufactured by DuPont Engineering Polymers, DuPont Building, 1007 Market Street, Wilmington, Del., 19898. The molded body 30 is a single piece having a vertical plate member 40 and a horizontal plate member 50. The vertical plate member 40 has one alignment opening 42 for each horizontal terminal 12A, 12B, 12C. Preferably, there are three alignment openings 42A, 42B, 42C. The alignment openings 42A, 42B, 42C are structured to allow one horizontal terminal 12A, 12B, 12C to pass therethrough. The alignment openings 42A, 42B, 42C further position the horizontal terminals 12A, 12B, 12C in a selected location so that the horizontal terminals 12A, 12B, 12C may be coupled to the vertical conductors 24A, 24B, 24C. The vertical plate member 40 is further structured to be disposed in the circuit breaker housing assembly sidewall opening 22. The vertical plate member 40 is further structured to be coupled to the circuit breaker housing assembly sidewall 20 by one or more fasteners 44.
The horizontal plate member 50 is structured to support, and be coupled to, the horizontal buses 32A, 32B, 32C. The horizontal plate member 50 has a top side 52, a bottom side 54, and a first edge 56. As shown in
When assembled, the vertical plate member 40 is disposed in the circuit breaker housing assembly sidewall opening 22 with the horizontal terminals 12A, 12B, 12C passing through an alignment openings 42A, 42B, 42C. The vertical plate member 40 is secured to the circuit breaker assembly sidewall 20 by the fasteners 44. The horizontal terminals 12A, 12B, 12C are each disposed in a pocket 62A, 62B, 62C. The horizontal buses 32A, 32B, 32C are each coupled to a horizontal terminals 12A, 12B, 12C. The horizontal buses 32A, 32B, 32C extend generally perpendicular to the horizontal terminals 12A, 12B, 12C toward the first edge 56. Each horizontal bus 32A, 32B, 32C is also disposed in a pocket 62A, 62B, 62C. Each horizontal bus 32A, 32B, 32C extends below the horizontal wall 64A, 64B, 64C of the pocket 62A, 62B, 62C. The vertical conductors 24A, 24B, 24C are passed through the horizontal wall openings 66A, 66B, 66C and are coupled to a horizontal bus 32A, 32B, 32C by a fastener 70. In this configuration, fasteners 44 on the vertical plate member 40 and the arrangement of horizontal terminals 12A, 12B, 12C and horizontal buses 32A, 32B, 32C disposed in the pockets 62A, 62B, 62C and secured to the vertical conductors 24A, 24B, 24C, act to secure the consolidated circuit breaker support insulator and bus alignment piece 26 in place. The consolidated circuit breaker support insulator and bus alignment piece 26 may also include a circuit breaker support bracket 80, structured to be coupled to a circuit breaker (not shown), if required.
While specific embodiments of the invention have been described in detail, it will be appreciated by those skilled in the art that various modifications and alternatives to those details could be developed in light of the overall teachings of the disclosure. Accordingly, the particular arrangements disclosed are meant to be illustrative only and not limiting as to the scope of invention which is to be given the full breadth of the claims appended and any and all equivalents thereof.
