WO2015055261A1

WO2015055261A1 - Distribution bus bar

Info

Publication number: WO2015055261A1
Application number: PCT/EP2013/075181
Authority: WO
Inventors: Michael Bartonek; Michael Koch
Original assignee: Eaton Industries (Austria) Gmbh
Priority date: 2012-11-29
Filing date: 2013-11-29
Publication date: 2015-04-23
Also published as: DE102012111617A1

Abstract

The invention relates to a distribution bus bar (1), in particular a low-voltage distribution bus bar, wherein the distribution bus bar (1) comprises at least a first bus bar (2) and a second bus bar (3), on which a predeterminable plurality of connecting tabs (4) are arranged at predeterminable distances. It is proposed according to the invention that a current sensor (5) is arranged in each case on the connecting tabs (4) of at least the first bus bar (2), that the distribution bus bar (1) comprises a control unit (6) and that the current sensors (5) and the control unit (6) are connected to each other in such a way as to transmit messages.

Description

DISTRIBUTION RAIL

The invention relates to a busbar according to the preamble of claim 1.

The electrical building installation is usually built with the construction of a building and usually hardly changed, as this is usually associated with considerable effort. This leads to the fact that in many buildings meanwhile aged protection technology is responsible for the protection of human life and the building protection. In recent years, however, the electrical protection technology has been steadily improved through the use of modern information technology, so that modern home installation systems not only allow a much better and more diverse protection of living things and facilities, but also a valuable help in finding and correcting any errors or . Presents problems.

However, these novel devices in the field of electrical protection measures are often costly and also their integration into an existing building protection concept is often problematic, since it must be intervened in the construction of a switching distributor, which has been shown that such interventions often cause errors themselves again. In addition to the cost of purchasing a "smart" switchgear, for example, there is also a considerable amount of installation work, which is one of the reasons for the low acceptance and spread of this new technology

Protection technology is often limited to commercial new buildings, while average households hardly get the benefit of higher protection. The object of the invention is therefore to provide a busbar of the type mentioned, with which the mentioned disadvantages can be avoided, with which simple and inexpensive safety in electrical systems can be increased.

This is achieved by the features of claim 1 according to the invention.

This can simply increase the safety in electrical systems. Thereby can above all, existing systems can be easily retrofitted without major financial or personnel expenses. As a result, it is only necessary the

Replacing busbars in a distribution cabinet without changing the switchgear itself. As a result, the entire installation arrangement can be extended by additional functions such as load management or continuous monitoring of the power consumption of individual branches. This makes it easier to troubleshoot and correct errors. As a result, even before the emergency shutdown of a circuit breaker, a corresponding warning to reduce the power purchase are issued, which it does not even come to an emergency shutdown and the life of the used

Protection switching devices is significantly extended. This ensures that the circuit breaker used safely switches off the load in the event of a fault.

The subclaims relate to further advantageous embodiments of the invention.

It is hereby expressly referred to the wording of the claims, whereby the claims at this point are incorporated by reference into the description and are considered to be reproduced verbatim.

The invention will be described in more detail with reference to the accompanying drawings, in which only preferred embodiments are shown by way of example. Showing:

Fig. 1 is a schematic representation of a preferred embodiment of a

objective distribution rail in elevation;

FIG. 2 shows a schematic illustration of the distributor rail according to FIG. 1 in plan view; FIG.

Fig. 3 is a schematic representation of an arrangement of a busbar according to the invention with two switching devices; and

4 shows a block diagram of a control unit in a distributor rail according to the invention. 1 to 4 each show a busbar 1, in particular a low-voltage busbar, wherein the busbar 1 at least a first busbar 2 and a second busbar 3, to which a predeterminable plurality of terminal lugs 4 are arranged at predetermined intervals, wherein the Terminal lugs 4 at least the first busbar 2 each have a current sensor 5 is arranged, wherein the Distributor rail 1 has a control unit 6, and wherein the current sensors 5 and the control unit 6 are connected by telecommunications technology.

This can simply increase the safety in electrical systems. This makes it possible to retrofit existing systems, in particular, easily and without major financial or personnel expenses. As a result, it is only necessary the

To replace busbars 1 in a distribution cabinet without changing the switchgear itself. As a result, the entire installation arrangement can be extended by additional functions such as load management or continuous monitoring of the power consumption of individual branches. This makes it easier to troubleshoot and correct errors. As a result, even before the emergency shutdown of a circuit breaker, a corresponding warning to reduce the power purchase are issued, which it does not even come to an emergency shutdown and the life of the used

Protective switching devices 10, 11 is significantly extended. This can ensure that in the event of a fault, the protective switching devices 10, 11 used safely switch off the load. Busbars 1, which are also referred to as busbars, are widely used for connecting electrical switching devices in distribution cabinets. In particular, for electrical connection so-called. Protective switching devices 10, 11 such as residual current circuit breaker and

Miniature circuit breakers in cabinets of low voltage technology or the

Hausinstalationstechnik. As a low voltage technology in particular voltages in the range of 240V / 400V three-phase network are considered. The distributor rail 1 preferably has an outer insulating material jacket 17 at least in regions.

A distributor rail 1 in this case has at least one first busbar 2 and a second busbar 3, which are generally formed comprising copper. These

Busbars 2, 3 are usually formed as a conductor with a rectangular cross-section and arranged in the insulating jacket 17, which hiezu has approximately slots in which the

Busbars 2, 3 are arranged. The Isolierstoffmantel 17 is shown only schematically in Figures 1 to 4. It is preferably provided that the distributor rail 1 can have further busbars, in particular a total of three or four busbars. The further description of the subject invention is applicable to other busbars.

The first busbar 2 and a second busbar 3 each have a predeterminable A plurality of terminal lugs 4, which preferably protrude substantially at right angles from the busbars 2, 3. The end tabs 4 are preferably U-shaped, whereby this when connecting a switching device, a screw of a

Can include screw terminal on both sides. It can also be designed differently shaped connecting lugs 4. Preferably, both busbars 2, 3 each have the same number of terminal lugs 4, which are also arranged at periodic intervals.

It is provided that at least the first busbar 2 each have a current sensor 5 is arranged at the terminal lugs 4. Through the current sensors 5, the currents flowing in each case via the relevant connection lug 4 can be detected. The current sensor 5 is preferably formed as a current transformer, which surrounds the connection tab 4 at least partially, wherein other embodiments of a current sensor 5 may be provided.

According to a preferred embodiment, it is provided that a respective current sensor 5 is arranged on the terminal lugs 4 of the second busbar 3, whereby the currents flowing via their terminal lugs 4 can also be detected and monitored.

It is further provided that the busbar 1 has a control unit 6, and that the current sensors 5 of the first busbar 2 and preferably also the second busbar 3 and the control unit 6 are connected by telecommunications technology. The control unit 6 can thereby read in each case the measurement signals generated by the individual current sensors 5, and thereby monitor the current flow via the distributor rail 1 and the individual connection lugs.

The control unit 6 is preferably arranged on an end region of the distributor rail 1. As a result, it is possible to freely cut or cut off the busbar 1 from the other end and to adapt it to the respective requirements. The electrician does not have to pay attention to an internal structure, but can simply cut the busbar 1. As a result, an electrician can essentially maintain his usual workflow, avoiding sources of error and supporting speedy, error-free work.

Figs. 1 and 2 show an elevation and a plan of a preferred

Embodiment of a busbar 1, wherein in Fig. 1, the busbars 2, 3 not are shown, but only the outgoing of these connecting tabs 4, and wherein in Fig. 2 on the representation of the connection between the current sensors 5 and the

Control unit 6 has been omitted.

Fig. 3 shows a schematic representation of an arrangement of a busbar 1 with a first protection device 10, and a second protection device 11, wherein further a reclosing device 12 is indicated by dashed lines.

The control unit 6 is preferably designed as an electronic circuit arrangement, wherein it is provided, in particular, that it has a microcontroller 13, which is also abbreviated as μC, and / or a programmable logic module, such as an FPGA.

Furthermore, the control unit 6, according to the preferred shown in Fig. 4

Embodiment, an analog / digital converter 14, also abbreviated as ADC, on, as well as a power supply unit 16, which preferably with the first and second

Busbar 2, 3 is in communication. In Fig. 4, furthermore, the first bus bar is shown only by dashed lines.

The control unit 6 is further with the individual current sensors 5 in one

telecommunications connection 9. This telecommunications connection 9 is preferred and, as shown in Figures 1, 3 and 4, conducted by cable, by the individual current sensors 5 are connected by means of wired conductors in each case with the control unit 6. But it can also be a wireless communication technology connection, in particular by radio, be provided, which can be dispensed with the additional lines in the busbar 1.

Preferably, it is further provided that the busbar 1 has a voltage sensor 7, for detecting the electrical voltage between the first busbar 2 and the second busbar 3, and that the voltage sensor 7 and the control unit 6 are connected by telecommunications technology. Such a voltage sensor 7 is provided in each of the distribution rails 1 shown in FIGS. 1 to 7. For more than two

Busbars 2, 3 in a busbar 1 are preferably provided additional voltage sensors, which preferably the electrical voltages between all

Busbars can be detected and monitored. By monitoring the

Voltage between the individual busbars 2, 3 can in conjunction with the currents the respective power consumption, or at least the reactive power consumption, can be detected via the individual connection lugs 4. In addition, when monitoring the voltages between a plurality of busbars 2, 3, for example in a three-phase system, an unbalanced load thereof can be detected and taken into account. It can be provided that the distributor rail 1 has further sensors. In this case, it is provided in particular that the distributor rail 1 has at least one temperature sensor, which is connected to the control unit 6 by telecommunications. Since the heating of a busbar 2, 3 is directly related to the current flow through it, can be obtained via a temperature sensor, a further parameter for evaluating the state of the subsequent electrical installation assembly. Furthermore, an optical sensor can also be provided in order to detect arcs in the region of the busbar 1.

The telecommunications connection 9 of the voltage sensor 7, as well as the

Temperature sensor is preferably analogous to that described above

telecommunications connection 9 between the current sensors 5 and the control unit 6 is formed.

Preferably, the control unit 6 further comprises a multiplexer 15 which connects the individual sensors, therefore current sensors 5 and / or voltage sensor 7 and / or temperature sensor, controllably to the ADC 14 and via this with the μC 13. It can be further provided the busbar 1 is a bus system for

Communication with at least one protective switching device 10, 11 and / or at least one reclosing device 12, which to the relevant busbar. 1

connected. It is preferably provided that on the busbar. 1

corresponding interfaces are arranged. By means of such a bus system, which is designed in particular as a field bus system, such as EIB, can be acted directly controlling single protection devices 10, 11 or about a reclosing device 12.

The illustrated in FIGS. 1, 2 and 4 preferred embodiments of a

Distribution rail 1 also have a data input and / or output 8, in particular a data interface, on which data input and / or output 8 is connected to the control unit 6. Preferably, this data input and / or output 8 is according to Modbus, CAN, Ethernet or USB trained, but this can also be designed as a simple TTL output. By means of such a data input and / or output 8, a communication with other external components, such as a PC or a smartphone, take place, whereby the external monitoring of a connected installation arrangement is simplified, but it can also be provided by means of this, for example, on the preferred μC, for example for the purpose of a software update.

Claims

1. busbar (1), in particular low-voltage busbar, wherein the busbar (1) at least a first busbar (2) and a second busbar (3) on which at predetermined intervals a predetermined plurality of terminal lugs (4) are arranged, characterized in that a respective current sensor (5) is arranged on the connection lugs (4) of at least the first busbar (2), that the

Distributor rail (1) has a control unit (6), and that the current sensors (5) and the control unit (6) are connected by telecommunications technology.

2. distributor rail (1) according to claim 1, characterized in that the

Control unit (6) is arranged at an end region of the distributor rail (1).

3. busbar (1) according to claim 1 or 2, characterized in that at the terminal lugs (4) of the second busbar (3) each have a current sensor (5) is arranged, which current sensors (5) with the control unit (6) telecommunications connected are.

4. busbar (1) according to one of claims 1 to 3, characterized in that the busbar (1) comprises a voltage sensor (7) for detecting the electrical voltage between the first busbar (2) and the second busbar (3), and that the voltage sensor (7) and the control unit (6) are connected by telecommunications technology.

5. distributor rail (1) according to one of claims 1 to 4, characterized in that the distributor rail (1) has at least one temperature sensor, which is connected to the control unit (6) telecommunications technology.

6. distributor rail (1) according to claim 5, characterized in that the

Control unit (6) with the current sensors (5) and / or the voltage sensor (7) and / or the temperature sensor conduction bound telecommunications technology.

7. busbar (1) according to claim 5 or 6, characterized in that the

Control unit (6) with the current sensors (5) and / or the voltage sensor (7) and / or the temperature sensor wirelessly, in particular by radio, telecommunications are connected.

8. busbar (1) according to one of claims 1 to 7, characterized in that the busbar (1) has a data input and / or output (8), in particular a data interface, and that the data input and / or output (8) to the control unit (6) is connected.