Patent Application
20230187156
The invention relates to a mounting adapter for at least one electrical switch and to a switch cabinet having such a mounting adapter.
During the short-circuit turning-off of circuit breakers, switching gases are produced which carry impurities with them. These impurities may be, for example, metal beads or soot particles. In the event of a short-circuit, these impurities are distributed throughout the installation. Affected switch cabinets and distributors have to be cleaned frequently in a complicated way, which may lead to installation downtimes. Similarly, electronic devices or lines in said distributors may be adversely affected by the metal beads, giving rise, for example, to short-circuits.
Older circuit breakers frequently blow said impurities unhindered out of the switch and distribute same throughout the installation. Modern circuit breakers may be equipped with small filters. The cleaning effect of said filters is highly limited because of the small construction volume within a circuit breaker. Frequently, only approx. 50% of the particles are retained, and the remainder is distributed in the installation.
In order to avoid electrical flashovers, typically insulation distances in conventional distributor constructions are realized by relatively large phase partitions and/or clamping coverings. In the restricted construction space of switch panels, these measures are not possible, or can be realized only with difficulty, because of space reasons.
It is therefore the object of the present invention to provide a mounting adapter which, even in a restricted switch panel, permits the required insulation distances for protecting against flashovers and a targeted dissipation of the switching gases.
The object according to the invention is achieved by the mounting adapter as claimed in patent claim 1. Advantageous refinements of the mounting adapter according to the invention are indicated in dependent claims 2 to 11. The object according to the invention is also achieved by the switch cabinet as claimed in patent claim 12.
The mounting adapter for at least one electrical switch as claimed in patent claim 1 is configured in such a manner that the at least one electrical switch has outlets for switching gases on its output side and/or on its input side, wherein the at least one electrical switch can be mounted from the top side of the mounting adapter, wherein the mounting adapter can be securely mounted in a switch cabinet, wherein the switching gases of an electrical switch mounted in the mounting adapter are guided from the output side and/or the input side in exhaust gas channels in each case to the side/underside of the mounting adapter and can exit the mounting adapter from there.
An advantage of the mounting adapter according to the invention is that, in the event of a short-circuit of the electrical switch, the exhaust gas flow can be guided and controlled in a defined way. Furthermore, the mounting adapter according to the invention permits a compact design which can readily be integrated in a switch panel or a switch cabinet.
In one refinement of the mounting adapter according to the invention, the switching gases from the output side and/or from the input side of the at least one electrical switch are first of all guided in first exhaust gas channel sections substantially perpendicularly in the direction of the side/underside of the mounting adapter and are then fed to one another in second exhaust gas channel sections below the at least one electrical switch.
In a further refinement of the mounting adapter according to the invention, electrically insulated fittings past which the switching gases are conducted run through one of the first exhaust gas channel sections.
In one refinement, in the case of a multi-pole electrical switch, the switching gases are guided separately downstream of the respective poles as far as the side/underside of the mounting adapter. In the case of a multi-pole electrical switch, the switching gases can be guided at least partially separately downstream of the respective poles in the second exhaust gas channel sections.
In a further refinement of the mounting adapter according to the invention, the latter, on the side/underside, comprises a filter box through which the switching gases exit the mounting adapter.
In a further refinement, the filter box is arranged at the convergence of the second exhaust gas channel sections.
In a further refinement of the mounting adapter according to the invention, the filter box has an arrangement of holes, the filter box is filled with a filter medium, or the filter box comprises a labyrinth.
In one refinement, the electrical switch is introduced into the mounting adapter from the top side and/or fastening and contact screws are likewise accessible from the top side.
In a further refinement, the electrical switch is a circuit breaker.
The switch cabinet having a mounting adapter according to the invention as claimed in patent claim 12 comprises a wall at which the mounting adapter is securely mounted in the switch cabinet.
The above-described properties, features and advantages of this invention and the manner in which they are achieved will become clearer and more comprehensible in conjunction with the description below of the exemplary embodiments which will be explained in more detail in conjunction with the figures.
In the figures:
The switching gases of an electrical switch 1000 mounted in the mounting adapter 100 are guided from the output side 1010 and/or the input side 1020 in exhaust gas channels in each case to the side/underside 120 of the mounting adapter 100 and can exit the mounting adapter 100 from there.
These exhaust gas channels are described in more detail in
The same applies to the output side 1010 of the electrical switch 1000. Here too, the switching gases are guided in first exhaust gas channel sections substantially perpendicularly in the direction of the side/underside 120 of the mounting adapter 100 and then in a second exhaust gas channel section 181 below the at least one electrical switch 1000 in order to exit the mounting adapter 100.
The switching gases from the input side 1020 and/or from the output side 1010 are fed to one another below the at least one electrical switch 1000 in order to exit the mounting adapter 100.
Electrically insulated fittings 1021, 1022, 1023 past which the switching gases are conducted can run through the first exhaust gas channel sections 170, 171, 172. For example,
In
In
The outer housing covering of the first exhaust gas channel sections 170, 171, 172 and of the second exhaust gas channel sections 180, 181 covering said channels such that they withstand the turning-off pressure, is not illustrated in
In
In
The electrical switch 1000 can be introduced into the mounting adapter 100 according to the invention from the top side 110 thereof. This also applies to fastening and contact screws which are likewise accessible from the top side 110 of the mounting adapter 100.
The electrical switch 1000 can be, for example, a circuit breaker.
The mounting adapter 100 according to the invention can be securely mounted on a wall 2000 of a switch cabinet. This wall is likewise illustrated in the illustrations of the figures except for
The mounting adapter 100 according to the invention permits the following properties:
It is important that the mounting adapter 100 withstands the turning-off pressure and that little gas due to leakages of the exhaust gas channels 170, 171, 172; 180, 181 passes to the outside or to the neighboring pole so as to avoid phase flashovers or housing flashovers.
The mounting adapter 100 therefore enables the exhaust gas flow of the switching gases to be guided and controlled in a defined way in the event of a short-circuit of the electrical switch 1000. It permits a particularly compact design, especially for fitting on the wall 2000 of a switch cabinet.
On the rear side of the electrical switch 1000 or on the side/underside 120 of the mounting adapter 100, the mounting adapter 100 enables the switching gases emerging there to be filtered such that said switching gases pass without soot and contact combustion particles, for example, into the switch cabinet. For this purpose, the switching gases are conducted through a filter box 150 in which there is, for example, a filter medium, such as glass wool or rockwool.
An advantage in this case is that, after a short-circuit of the electrical switch 1000 located in the switch cabinet, the soot and contact combustion particles are filtered out of the switching gases and, as a result, the switch cabinet is not soiled and does not have to be cleaned. The solution according to the invention with the filter box 150 enables a high percentage, for example >90%, of the switching gases to be cleaned.
| Number | Date | Country | Kind |
|---|---|---|---|
| 10 2020 207 771.1 | Jun 2020 | DE | national |
| Filing Document | Filing Date | Country | Kind |
|---|---|---|---|
| PCT/EP2021/064133 | 5/27/2021 | WO |
