Low-, medium- and/or high-voltage installation with a bonded current path connection with long-term stability by means of nanomaterials, and method for producing said current path connection

Abstract

A method for establishing a materially bonded current path connection in low-voltage, medium-voltage and/or high-voltage installations having long-term stability includes providing a first part and/or a second part of a current path with a nanomaterial at least in one region. The first part and the second part of the current path are force-lockingly or form-lockingly connected at least in the respective regions. A supply of a reaction energy together with the nanomaterial creates a conductive and bonded connection between the first part and the second part of the current path. A low-voltage installation, a medium-voltage installation and/or a high-voltage installation is also provided.

Claims

1. A method for establishing a materially bonded current path connection in at least one of medium-voltage or high-voltage switchgear installations having a current path with at least one first portion and one second portion, the method comprising the following steps: providing a nanomaterial in at least one region of at least one of the first portion or the second portion of the switchgear installation current path; providing a first permanent connection of the first portion and the second portion of the current path to one another in at least one of a force-locking or form-locking manner at least in the respective regions; forming a permanent conductive and materially bonded second connection between the first portion and the second portion of the current path with participation of the nanomaterial by supplying reaction energy: not removing the first permanent force-locking or form-locking connection after forming the permanent conductive and materially bonded second connection; and providing at least one of: the first portion of the current path as an electrically conductive and flexible current conductor or a pole head or a current conductor clamp, or the second portion of the current path as a connection to a moving contact or fixed contact of a vacuum interrupter, to a transformer, or to a busbar.

2. The method according to claim 1, which further comprises: placing the nanomaterial between the respective regions of the first portion and the second portion of the current path being connected to one another in at least one of a force-locking or form-locking manner, or extending the nanomaterial beyond the respective regions of at least one of the first portion or the second portion of the current path.

3. The method according to claim 1, which further comprises forming the first portion and the second portion of the current path from at least one of an identical conductive material or an identical material combination.

4. The method according to claim 1, which further comprises providing the nanomaterial by at least one of: applying the nanomaterial to the respective region of at least one of the first portion or of the second portion of the current path, or including the nanomaterial on the respective region of at least one of the first portion or the second portion of the current path as at least one of a paste, a foil, a powder or a precursor.

5. The method according to claim 1, which further comprises using at least one connecting device to connect the first portion and the second portion of the current path in a force-locking manner in at least one region.

6. The method according to claim 4, which further comprises providing the connecting device as at least one of screws, rivets or clamps.

7. The method according to claim 1, which further comprises supplying the reaction energy to lead to a materially bonded connection between the first portion and the second portion of the current path, the materially bonded connection being locally limited to the first portion of the current path adjoining the nanomaterial and the second portion of the current path adjoining the nanomaterial.

8. The method according to claim 1, which further comprises supplying the reaction energy: to the nanomaterial as at least one of thermal energy or electrical energy, or in another form being converted into at least one of thermal energy or electrical energy at least one of in or on the nanomaterial.

9. The method according to claim 1, which further comprises providing the materially bonded connection of the first portion and the second portion of the current path and the nanomaterial by at least one of: creating the materially bonded connection by supplying the reaction energy, or basing the materially bonded connection on a sintering process of the nanomaterial, or including a sintering process in the materially bonded connection, or basing the materially bonded connection on welding of the first portion and the second portion of the current path due to an exothermic reaction of the nanomaterial or of a portion of the nanomaterial.

10. A switchgear installation for at least one of medium-voltage or high-voltage, the installation comprising: a switchgear installation current path having at least one first portion and one second portion; at least one of said first portion being an electrically conductive and flexible current conductor or a pole head or a current conductor clamp or said second portion being a connection to a moving contact or fixed contact of a vacuum interrupter, to a transformer, or to a busbar; a nanomaterial in at least one region of at least one of said first portion or said second portion of said current path; said first portion and said second portion of said current path being permanently connected to one another by a first connection in at least one of a force-locking or form-locking manner at least in said respective regions; a conductive and materially bonded permanent second connection formed between said first portion and said second portion of said current path with participation of said nanomaterial due to supplied reaction energy; and said first permanent force-locking or form-locking connection configured to not be removed after forming said conductive and materially bonded permanent second connection.

Description

BRIEF DESCRIPTION OF THE SEVERAL VIEWS OF THE DRAWING

(1) The subject matter of the invention will be explained in more detail below with reference to three figures, in which:

(2) FIG. 1: shows a materially bonded and force-locking connection according to the invention of a first and a second portion of a current path;

(3) FIG. 2: shows a schematic illustration of a connection of a vacuum interrupter to a conductive and flexible current conductor by means of nanomaterials; and

(4) FIG. 3: shows a flowchart of a method according to the invention for establishing a materially bonded and force-locking current path connection.

DESCRIPTION OF THE INVENTION

(5) FIG. 1 shows a connection according to the invention in a switchgear installation 1, not illustrated in any detail, wherein a first portion 10 of a current path is connected to a second portion 20 of a current path in a force-locking manner by means of a connecting means 40 and in a materially bonded manner by means of a nanomaterial 30.

(6) The force-locking connection 40 can be achieved, for example, by screws, rivets and/or clamps. As an alternative to the force-locking connection using a connecting means 40, a form-locking connection—not shown here—can also be used. The form-locking connection can be made, for example, by connecting regions of the first and of the second portion of the current path latching into one another or by shaping, for example pressing or crimping.

(7) FIG. 2 shows the connection of a vacuum interrupter 2 in a switchgear installation 1, not illustrated in any detail, wherein the moving contact connection 25 and the flexible current conductor 15 are firstly connected to one another in a force-locking manner by means of a connecting means 40 and secondly are connected to one another in a materially bonded manner by means of a nanomaterial 30. As an alternative—not shown here —, the moving contact bolt 25′ and the flexible current conductor 15 can also firstly be connected to one another in a force-locking manner by means of a connecting means 40 and secondly be connected to one another in a materially bonded manner by means of a nanomaterial 30. In this example, the flexible current conductor 15 is connected in a materially bonded manner to a further portion 50 of the current path, wherein said materially bonded connection is a conventional weld or solder connection.

(8) FIG. 3 shows a schematic sequence of the method according to the invention for establishing a materially bonded and form-locking and/or form-locking connection of a first and a second portion of a current path in a switchgear installation 1, in particular a switchgear installation for medium voltages and/or high voltages. In a first step 100, the first portion of a current path and/or the second portion of a current path are provided with a nanomaterial at least in one region, or the portions of the current path which are provided with a nanomaterial are provided. This also includes the nanomaterial being provided in the form of a foil or lattice and the foil or the lattice being placed on the first portion of a current path and/or the second portion of a current path or between said first portion and second portion.

(9) In a second step 200, a force-locking and/or form-locking connection is created between the first portion of the current path and the second portion of the current path.

(10) In a third step 300, a conductive and materially bonded connection between the first portion of the current path and the second portion of the current path is established, with involvement of the nanomaterial, by supplying reaction energy. In this case, the nanomaterial can either form the conductive connection by a process comprising a sintering process or can effect an exothermic reaction, which welds the first portion of the current path to the second portion of the current path, by supplying reaction energy.

List of Reference Symbols

(11) 1 Switchgear installation 2 Vacuum interrupter 10 First portion of a current path 15 Conductive, flexible current conductor as first portion of the current path 20 Second portion of a current path 25 Moving contact connection of a vacuum interrupter as second portion of the current path 25′ Moving contact bolt of a vacuum interrupter as second portion of the current path 30 Nanomaterial 40 Connecting means, for example screw, rivet or clamp 50 Further portion of the current path 100 Step 1 200 Step 2 300 Step 3