Title of Invention

A LOW-VOLTAGE POWER BREAKER CONVERTIBLE FROM A PERMANENT INSTALLED BREAKER TO A WITHDRAWAL BREAKER

Abstract

The invention relates to a low-voltage power breaker (10) having a first contact arrangement (24) for the purpose of connecting a stationary contact (18) to a first busbar (22) and having a second contact arrangement (34) for the purpose of connecting an opposing contact (16), which is arranged on a contact lever (14), to a second busbar (30). the busbars (22, 30) have design features which mean that the low-voltage power breaker (10) can be in the form of both a permanently installed breaker and a withdrawable breaker.

Full Text

The abovementioned embodiment of the busbars makes it possible for them to be arranged directly on the permanently installed breaker for use in a permanently installed breaker, but it is also possible for these busbars to be arranged permanently on the withdrawable part rack of a withdrawable breaker when the permanently installed breaker is converted to a withdrawable breaker once said busbars have been removed from the permanently installed breaker, with the result that the conversion of a permanently installed brealer to a withdrawable breaker entails a minimum amount of complexity in terms of materials since only- one additional withdrawable part rack is required for this conversion. Owing to the contact region provided, the busbars can be arranged directly on the withdrawable part rack. In this case, the surfaces of the contact region should end evenly with the surface of the withdrawable part rack with which contact is to be made. As a result of the fact that the busbars have an accommodating region for retaining means, it is possible for them to be permanently provi.ded with a retaining means and, as a result, to be permanently locked on the withdrawable part rack of a power breaker. In a particularly preferred embodiment, both the first and the second busbar have identical dimensions. This advantageously makes it possible for the same contact arrangements, which are preferably in the form of isolating contact arrangements, to be used both for the first busbar and for the second busbar. In accordance with a further preferred embodiment, the busbars can be arranged on the withdrawable part rack such that the withdrawable part rack has the same installation depth as the busbars in a permanently installed breaker. This ensures that the busbars need be arranged permanently on the withdrawable breaker merely using retaining means in the regions of sald busbars which are provided 1 or this purpose in order to convert the permanently installed breaker to a withdrawable breaker. As a result of the fact that the busbars arranged on a withdrawable part rack have the same installation depth as the busbars in the case of a permanently installed breaker, no further adaptation or conversion work is required. In a particularly preferred embodiment, the busbars are in the form of plates or blades. The invention will be explained in more detail below with reference to exemplary embodiments which are at least partially / accompanying figures, in which: figure 1 shows a low-voltage power breaker according to the invention which is in the form of a permanently installed breaker having closed contacts; figure 2 shows a low-voltage power breaker according to the invention which is in the form of a permanently installed breaker having open contacts; figure 3 shows a low-voltage power breaker according to the invention having a corresponding withdrawable part rack, and figure 4 shows a low-voltage power breaker according to the invention which is in the form of a withdrawable breaker. As can be seen in figure 1, a low-voltage power breaker 10 has a first contact arrangement 24 which produces a connection between a first stationary contact 18, which is arranged on a connection rail 17, and a first busbar 22. Furthermore, the power breaker 10 has a second contact arrangement 3 4 for the purpose of connecting a second busbar 3 0 to an opposing contact 16 which is arranged on a contact lever 14. The low-voltage power breaker 10 is in the form of a permanently installed breaker in figure 1 by the two busbars 22 and 30, which serve the purpose of producing a connection to system-side busbars which are not further illustrated, being fixed to the outside of the rear wall of the power breaker 10. First retaining means 12, which pass through first accommodating regions 2 0 of the busbars, are used for this fixing. The connection to the system-side busbars takes place using second retaining means (not illustrated) which pass through second accommodating regions 13 of the busbars 22 and 30. In order to reduce the variety of breaker parts required and thus to save on production costs, the connection rail 17 and the busbars 22 and 30 are of identical design, the accommodating region 13 of: the connection rail 17 serving the purpose of accommodating a fourth retaining means 15. The fourth retaining means 15 serves the purpose of fixing an arcing horn 19 on the connection rail 17. The first busbar 22 and the second busbar 30, which according to the invention have the accommodating region 2 0 for retaining means and a contact regicn 3 8 for the purpose of arranging the busbars 22, 3 0 on a withdrawable part rack 11 of the power breaker 10, make contact with the power breaker 10 with their side which faces the power breaker 10. The accommodating region 20 is in the form of a through-hole. The contact region 3 8 is located on that side of the busbars 22, 3 0 which is remote from the power breaker 10. The contact region 3 8 makes it possible to remove the busbars 22, 30 according to the invention of a permanently installed breaker, as illustrated in figure 1 and figure 2, from the permanently installed breaker and to arrange them on a withdrawable part rack 11 of a power breaker 10, as is illustrated in figure 3 Furthermore, the busbars 22, 30 which are arranged in this manner on the withdrawable part rack 11 can be permanently locked by means of third retaining means 35. The retaining means being about a permanent, force-fitting connection between the busbars 22, 30 and the withdrawable part rack 11 (as is illuscrated in figure 4) by means of the accommodating regions 2) for retaining means. As has been described above, conversion of the power breaker according to the invention from a permanently installed power breaker to a withdrawable power breaker can be realized in a particularly advantageous manner. The busbars 22, 30, which are locked and arranged on the withdrawable part rack, of the power breaker which is in the form of a withdrawable power breaker advantageously have the same installation depth as the busbars of a power breaker which is in the form of a permanently installed breaker, in its operating position. For this purpose, the busbars 22 and 30 are arranged on the inside of the withdrawable part rack which is associated with the withdrawable power breaker such that they make contact with the power breaker with their side which faces the power breaker when the withdrawable power breaker is pushed in, as is also the case with the power breaker in figures 1 and 2 which is designed for permanent installation. The position of the busbars 22 and 30 with respect to the contact arrangements 2 1 and 34 and with respect to the system- side busbars (not illustrated) is therefore the same in the case of the power breaker in figures 1 and 2, which is in the form of a permanently installed power breaker, as in the case of the power breaker in figures 3 and 4, which is in the form of a withdrawable power breaker. We Claim: 1. A system comprising: a first busbar (22); a second busbar (30); and a low-voltage power circuit breaker (10) having a first contact arrangement (24) for connecting a stationary contact (18) to the first busbar (22), and a second contact arrangement (34) for connecting an opposing contact (16), arranged on a contact lever (14), to the second busbar (30), each of the first and second busbars (22,30) comprising at least one contact region (38) by which the busbars (22,30) are permanently arrangeable on a withdrawable part rack (11) of the low-voltage power circuit breaker (10), each of the first and second busbars (22,30) having a side which faces the low-voltage power circuit breaker (10), by which the busbars (22,30) are permanently arrangeable on the outside of the low-voltage power circuit breaker (10), and each of the first and second busbars (22,30) comprising at least one accommodating region (20) for at least one retaining device (12) by which the busbars (22,30) are permanently lockable on the withdrawable part rack (11) of the low-voltage power circuit breaker (10) so as to form the low- voltage power circuit breaker as a withdrawable circuit breaker or on the outside of the low-voltage power circuit breaker so as to form the low-voltage power circuit breaker as a permanently installed circuit breaker, wherein the busbars (22,30) are arrangeable on the withdrawable part rack (11) when the low-voltage power circuit breaker (10) is a withdrawable circuit breaker such that they have a same installation depth as the busbars (22,30) when the low-voltage power circuit breaker (10) is a permanently installed circuit breaker. 2. The system as claimed in claim 1, wherein the accommodating region (20) for the at least one retaining device (12) and the side which faces the low-voltage power circuit breaker (10) are designed such that the busbars (22,30) are permanently atrangeable and lockable, reversibly, on the outside of the low-voltage power circuit breaker (30). 3. The system as claimed in claim 1, wherein the accommodating region (20) for the at least one retaining device (12) and the contact region (38) are designed such that the busbars (22,30) are permanently arrangeable and lockable, reversibly, on the withdrawable part rack (11) of the low-voltage power circuit breaker (10). 4. The system as claimed in claim 1, wherein the first busbar (22) and the second busbar (30) have identical dimensions. 5. The system as claimed in claim 1, wherein the busbars (22,30) are in a form of at least one of plates and blades. 6. The system as claimed in claim 2, wherein the accommodating region (20) for the at least one retaining device (12) and the contact region (38) is designed such that the busbars (22,30) are permanently arrangeable and lockable, reversibly, on the withdrawable part rack (11) of the low-voltage power circuit breaker (10). This invention relates to a low-voltage power breaker (10) having a first contact arrangement (24) for the purpose of connecting a stationary contact (18) to a first busbar (22) and having a second contact arrangement (34) for the purpose of connecting an opposing contact (16), which is arranged on a contact lever (14), to a second busbar (30). the busbars (22, 30) have design features which mean that the low-voltage power breaker (10) can be in the form of both a permanently installed breaker and a withdrawable breaker.

Documents:

1342-KOLNP-2005-CHANGE OF ADDRESS UNDER RULE 94.pdf

1342-KOLNP-2005-FORM-27.pdf

1342-kolnp-2005-granted-abstract.pdf

1342-kolnp-2005-granted-claims.pdf

1342-kolnp-2005-granted-correspondence.pdf

1342-kolnp-2005-granted-description (complete).pdf

1342-kolnp-2005-granted-drawings.pdf

1342-kolnp-2005-granted-examination report.pdf

1342-kolnp-2005-granted-form 1.pdf

1342-kolnp-2005-granted-form 18.pdf

1342-kolnp-2005-granted-form 2.pdf

1342-kolnp-2005-granted-form 3.pdf

1342-kolnp-2005-granted-form 5.pdf

1342-kolnp-2005-granted-gpa.pdf

1342-kolnp-2005-granted-reply to examination report.pdf

1342-kolnp-2005-granted-specification.pdf

1342-kolnp-2005-granted-translated copy of priority document.pdf